Frequency/Rate Meter K3NR High-speed, Intelligent Interface Modules with Seven Operating Modes Convert Single or Dual Input Pulses to Display Values • 50-kHz input range and 0.006% accuracy for sophisticated control. • A wide selection of outputs: relay, transistor, BCD, linear, or communications. • Maximum/Minimum value hold, set value write protection, and more. • Banks with four comparative output values and four prescale values. • Prescale function available, which displays in units of actual physical parameters (length, volume, etc.). • Set value teaching, linear output range teaching, and prescale teaching are available using actual measured values. • Displays values in hours, minutes, and seconds in operating mode 6. • A startup compensation time parameter keeps the measurement operation from sending an unnecessary output for a preset period up to 99.9 s. • Built-in sensor power supply (12 VDC, 80 mA). • Compact 1/8 DIN size. • Conforms to EMC standards, EN61010-1 (IEC61010-1). • UL/CSA approved. Model Number Structure ■ Model Number Legend Base Units and Output Boards can be ordered individually or as sets. Refer to the Output Board Combinations table on page 130. K3NR - Output Boards K31 - 6 7 5 1 2 3 4 1, 2. Input Sensors Codes NB: NPN inputs/Voltage pulse inputs PB: PNP inputs 3. Supply Voltage 1: 100 to 240 VAC 2: 12 to 24 VDC 4. Display A:Basic C:Set Value LED Display 5, 6, 7, 8. Output Type Codes C1: 3 comparative relay contact outputs (H, PASS, L: SPDT) C2: 5 comparative relay contact outputs (HH, H, L, LL: SPSTNO; PASS: SPDT) C5: 5 comparative relay contact outputs (HH, H, L, LL: SPSTNC; PASS: SPDT) T1: 5 comparative transistor outputs (NPN open collector) T2: 5 comparative transistor outputs (PNP open collector) B2: BCD output (NPN open collector) (see note) B4: BCD output + 5 transistor outputs (NPN open collector) L1: Linear output (4 to 20 mA) (see note) Note: These output types are available on Basic Models only. Base Units with Output Boards K3NR 8 1 2 3 4 5 6 7 8 Linear output (1 to 5 VDC) (see note) Linear output (1 mV/10 digits) (see note) Linear output, 4 to 20 mA + 5 transistor outputs (NPN open collector) L5: Linear output, 1 to 5 V + 5 transistor outputs (NPN open collector) L6: Linear output, 1 mV/10 digits+ 5 transistor outputs (NPN open collector) L7: Linear output, 0 to 5 VDC (see note) L8: Linear output, 0 to 10 VDC (see note) L9: Linear output, 0 to 5 VDC + 5 transistor outputs (NPN open collector) L10: Linear output, 0 to 10 VDC + 5 transistor outputs (NPN open collector) FLK1: Communication RS-232C (see note) FLK2: Communication RS-485 (see note) FLK3: Communication RS-422 (see note) FLK4: RS-232C + 5 transistor outputs (NPN open collector) FLK5: RS-485 + 5 transistor outputs (NPN open collector) FLK6: RS-422 + 5 transistor outputs (NPN open collector) L2: L3: L4: Frequency/Rate Meter K3NR K-129 Panel indicators Base Units Ordering Information ■ Base Unit Input type NPN/Voltage pulse Supply voltage 100 to 240 VAC PNP 12 to 24 VDC 100 to 240 VAC 12 to 24 VDC Basic Models These models provide a present value LED and front-panel control keys. Can be connected to any Output Board, or can be used for display only without an Output Board. K3NR-NB1A K3NR-NB2A K3NR-PB1A K3NR-PB2A Set Value LED Models These models provide a present value LED, set value LED, and front-panel control keys. Can be connected to Relay, Transistor, or Combination Output Boards. K3NR-NB1C K3NR-NB2C K3NR-PB1C K3NR-PB2C ■ Available Output Board Combinations Output type Output configuration Output boards Base units Basic Relay contact Transistor Set Value LED Display 3 outputs: H, PASS, L (SPDT) K31-C1 Yes Yes 5 outputs: HH, H, L, LL (SPST-NO), and PASS (SPDT) K31-C2 Yes Yes 5 outputs: HH, H, L, LL (SPST-NC), and PASS (SPDT) K31-C5 Yes Yes 5 outputs (NPN open collector) K31-T1 Yes Yes 5 outputs (PNP open collector) K31-T2 Yes Yes BCD (see note) 5-digit output (NPN open collector) K31-B2 Yes --- Linear 4 to 20 mA DC K31-L1 Yes --- 1 to 5 VDC K31-L2 Yes --- 1 mV/10 digits K31-L3 Yes --- Communication boards (see note) Combination output and communication boards 0 to 5 VDC K31-L7 Yes --- 0 to 10 VDC K31-L8 Yes --- RS-232C K31-FLK1 Yes --- RS-485 K31-FLK2 Yes --- RS-422 K31-FLK3 Yes --- BCD output + 5 transistor outputs (NPN open collector) K31-B4 Yes Yes 4 to 20 mA + 5 transistor outputs (NPN open collector) K31-L4 Yes Yes 1 to 5 V + 5 transistor outputs (NPN open collector) K31-L5 Yes Yes 1 mV/10 digits + 5 transistor outputs (NPN open collector) K31-L6 Yes Yes 0 to 5 VDC + 5 transistor outputs (NPN open collector) K31-L9 Yes Yes 0 to 10 VDC + 5 transistor outputs (NPN open collector) K31-L10 Yes Yes RS-232C + 5 transistor outputs (NPN open collector) K31-FLK4 Yes Yes RS-485 + 5 transistor outputs (NPN open collector) K31-FLK5 Yes Yes RS-422 + 5 transistor outputs (NPN open collector) K31-FLK6 Yes Yes Note: For details, refer to the Communication Operation Manual. K-130 Frequency/Rate Meter K3NR Specifications ■ Ratings Supply voltage 100 to 240 VAC (50/60 Hz); 12 to 24 VDC Operating voltage range 85% to 110% of supply voltage Power consumption (see note) 15 VA max. (max. AC load with all indicators lit) 10 W max. (max. DC load with all indicators lit) Sensor power supply 80 mA at 12 VDC±10% Insulation resistance 20 MΩ min. (at 500 VDC) between external terminal and case. Insulation provided between inputs, outputs, and power supply. Dielectric strength 2,000 VAC for 1 min between external terminal and case. Insulation provided between inputs, outputs, and power supply. Noise immunity ±1,500 V on power supply terminals in normal or common mode ±1 µs, 100 ns for square-wave noise with 1 ns Vibration resistance Malfunction: 10 to 55 Hz, 0.5-mm for 10 min each in X, Y, and Z directions Destruction: 10 to 55 Hz, 0.75-mm for 2 hrs each in X, Y, and Z directions Shock resistance Malfunction: 98 m/s2 for 3 times each in X, Y, and Z directions Destruction: 294 m/s2 for 3 times each in X, Y, and Z directions Ambient temperature Operating: Storage: −10°C to 55°C (with no icing) −20°C to 65°C (with no icing) Ambient humidity Operating: 25% to 85% (with no condensation) EMC (EMI) Emission Enclosure: Emission AC Mains: (EMS) Immunity ESD: Approved standards UL508, CSA22.2; Conforms to EN61326+A1, EN61010-1 (IEC61010-1) Conforms to VDE0106/P100 (finger protection) when the terminal cover is mounted. Weight Approx. 400 g EN61326+A1 Industry CISPR 11 Group 1 class A: CISRP16-1/-2 CISPR 11 Group 1 class A: CISRP16-1/-2 EN61326+A1 Industry EN61000-4-2: 4 kV contact discharge (level 2) 8 kV air discharge (level 3) Immunity RF-interference: EN61000-4-3: 10 V/m (amplitude-modulated, 80 MHz to 1 GHz) (level 3) Immunity Fast Transient Noise: EN61000-4-4: 2 kV (power line) (level 3) Immunity Burst Noise: 1 kV line to line (I/O signal line) Immunity Surge: EN61000-4-5: 1 kV line to line 2 kV line to ground (power line) Immunity Conducted Disturbance EN61000-4-6: 3 V (0.15 to 80 MHz) (level 2) Immunity Voltage Dip/Interrupting EN61000-4-11: 0.5 cycles, 0, 180°, 100% (rated voltage) Panel indicators Note: A K3NR with DC supply voltage requires approximately 1 A DC as control power supply current the moment the K3NR is turned ON. Do not forget to take this into consideration when using several K3NR units. When the K3NR is not in measuring operation (e.g., the K3NR has been just turned ON or is operating for startup compensation time), the display will read “00000” and all outputs will be OFF. Frequency/Rate Meter K3NR K-131 ■ Characteristics Input signal No-voltage contact (30 Hz max., ON/OFF pulse width: 15 ms min.) Voltage pulse (50 kHz max., ON/OFF pulse width: 9 µs min., ON voltage: 4.5 to 30 V/OFF voltage: −30 to 2 V) Open collector (50 kHz max., ON/OFF pulse width: 9 µs min.) Connectable Sensors ON residual voltage: 3 V max. OFF leakage current: 1.5 mA max. Load current: Must have switching capacity of 20 mA min. Must be able to dependably switch a load current of 5 mA max. Measuring accuracy (at 23±5°C) Operating modes 1 and 6: ±0.006%rdg±1 digit Operating modes 2 to 5: ±0.02%rdg±1 digit Measuring modes and ranges (Operating modes 1 to 6 are for no-contact sensor models) Operating mode 1: Operating mode 2: Operating mode 3: Operating mode 4: Operating mode 5: Operating mode 6: Operating mode 7: Rotational/circumferential speed 0.0005 to 50,000 Hz Absolute ratio 0.0005 to 50,000 Hz Error ratio 0.0005 to 50,000 Hz Rotational difference 0.0005 to 50,000 Hz Flow rate ratio 0.0005 to 50,000 Hz Passing time 0.0005 to 50,000 Hz Pulse counting 0 to 4G count (32-bit counter) Max. displayed digits 5 digits (−19999 to 99999) Display 7-segment LED Polarity display “−” is displayed automatically with a negative input signal. Zero display Leading zeros are not displayed. Prescale function Programming via front-panel key inputs. (0.0001 x 10−9 to 9.9999 x 109, decimal point can be set freely) Can be set using prescale value teaching. HOLD functions (see note 2) Max. value (peak) hold, Min. value (bottom) hold External control HOLD (Process value held) RESET (Maximum/minimum data reset, counting value reset) BANK (Selection of one bank out of 4 banks of set values) (Selection of one bank out of 4 banks of prescale values) Comparative output hysteresis setting Programmable with front-panel key inputs (1 to 9999). Other functions Variable linear output range (for models with linear outputs only) (note 1) Remote/Local processing (available for communications output models only) Maximum/Minimum value data reset with front panel keys Comparative output pattern selection Process time for averaging measured values Startup compensation time (0.0 to 99.9 s) Time unit display Security Memory power failure Output configuration Relay contact output (3 or 5 outputs) Transistor output (NPN and PNP open collector), BCD (NPN open collector) Parallel BCD (NPN open collector) + transistor output (NPN open collector) Linear output (4 to 20 mA, 1 to 5 V) + transistor output (NPN open collector) Communication functions (RS-232C, RS-485, RS-422) Communication functions (RS-232C, RS-485, RS-422) + transistor output (NPN open collector) Operating modes 1 to 6: 200 ms max. Delay in comparative 1 ms max. outputs (at transistor output) Operating mode 7: Linear output response time Operating modes 1 to 6: 220 ms max. Operating mode 7: 20 ms max. Degree of protection Front panel: NEMA4X for indoor use (equivalent to IP66) Rear case: IEC standard IP20 Terminals: IEC standard IP00 Memory protection Non-volatile memory (EEPROM) (possible to rewrite 100,000 times) Note: 1. The linear output range cannot be set when connected to a 1 mV/10-digit Linear Output Board. 2. Not effective for operating mode 7. K-132 Frequency/Rate Meter K3NR ■ Input/Output Ratings Relay Contact Output (Incorporating a G6B Relay) Item Resistive load (cosφ = 1) Inductive load (cosφ = 0.4, L/R = 7 ms) Rated load 5 A at 250 VAC; 5 A at 30 VDC 1.5 A at 250 VAC, 1.5 A at 30 VDC Rated carry current 5 A max. (at COM terminal) Max. contact voltage 380 VAC, 125 VDC Max. contact current 5 A max. (at COM terminal) Max. switching capacity 1,250 VA, 150 W Min. permissible load (P level, reference value) 10 mA at 5 VDC Mechanical life 50,000,000 times min. (at a switching frequency of 18,000 times/hr) Electrical life (at an ambient temperature of 23°C) 100,000 times min. (at a rated load switching frequency of 1,800 times/hr) 375 VA, 80 W Transistor Output Rated load voltage 24 VDC max. Max. load current 50 mA Leakage current 100 µA max. BCD Output I/O signal name Inputs Outputs Item REQUEST, HOLD, MAX, MIN, RESET DATA, POLARITY, OVERFLOW, DATA VALID, RUN Rating Input signal No-voltage contact input Input current with no-voltage input 10 mA Signal level ON voltage: 1.5 V max. OFF voltage: 3 V min. Rated load voltage 24 VDC max. Max. load current 10 mA Leakage current 100 µA max. Note: Logic method: negative logic Linear Output Item 4 to 20 mA Resolution 4,096 Output error ±0.5% FS Permissible load resistance 600 Ω max. 1 to 5 V 1 mV/10 digits (see note) ±1.5% FS 500 Ω min. 1 KΩ min. Note: For the 1 mV/10-digit output, the output voltage changes for every 40 to 50 increment in the display value. ■ Communications Specifications RS-232C, RS-422 4-wire, half-duplex Synchronization method Start-stop synchronization Baud rate 1,200/2,400/4,800/9,600/19,200/38,400 bps ASCII (7-bit) Transmission code Communications RS-485 2-wire, half-duplex Write Comparative set value, prescaling value, remote/local programming, reset control of maximum/minimum values, and other setting mode items excluding communications conditions. Read Process value, comparative set value, maximum value, minimum value, model data, error code, and others For details, refer to Communication Operation Manual. Frequency/Rate Meter K3NR K-133 Panel indicators Item Transmission method Connections ■ Terminal Arrangement Terminal Numbers Output unit Output unit 18 19 20 21 22 23 24 25 26 10 11 12 13 14 15 16 17 Input unit Input unit 1 2 3 4 5 6 7 8 9 Note: Terminals 7 to 13 are connected internally. Terminals 7 and 11 are mutually isolated. Input Unit 12 VDC 80 mA When inputting the external control signals and input signals through the open collector: Transistor Inputs: ON: Residual voltage must be 3 V max. OFF: Leakage current must be 1.5 mA max. The switching capacity must be 20 mA or greater. When the external signal input is short-circuited, a voltage of approximately 5 V will be applied to between the terminals 5 to 7 and the COM terminal, and a current of approximately 18 mA (nominal value) will flow. − 100 to 240 VAC or 12 to 24 VDC Signal input terminal Note: Check the power supply specifications of the model used before connecting the power supply. Voltage Pulse Inputs NPN Inputs PNP-Inputs External sensor power 10 supply (+) +12 V 820 Ω 1 +12 V 590 Ω +12 V GND 590 Ω 820 Ω Input B 2 External sensor 11 power supply (−) Input A 10 k Ω 3 590 Ω 820 Ω Input A GND +12 V Input B 10 k Ω 4 590 Ω 820 Ω Input B 1 820 Ω GND 2 820 Ω External sensor 11 power supply (−) GND GND +12 V 590 Ω +12 V Internal circuits Input A +12 V Internal circuits External sensor 10 power supply (+) 11 590 Ω Internal circuits + GND GND K3NR-NB (NPN Input/Voltage Pulse Input) NPN Open Collector Output (NPN Linear 2-wire Output) K3NR-PB (PNP Input) Contact Output Voltage Output PNP Open Collector Output Input resistance: 10 kΩ 10 10 1 1 +12 V INA 10 11 10 11 11 2 3 4 2 INA 3 INB 4 +12V GND INB 1 2 3 1 4 +12V INA INB 0V INA 11 2 3 4 INB 0V 0V Contact NPN output sensor Note: When the contact is shortcircuited, a current of approximately 13 mA will flow at a voltage of approximately 12 V. Note: Connect the + side of the NPN linear 2-wire input to terminal 1 and the − side to terminal 11. K-134 Frequency/Rate Meter K3NR Voltage pulse output sensor Note: With voltage pulse input not from a 3-wire sensor, connect the + side to terminal 3 and the − side to terminal 11. PNP output sensor Output Units K31-C1: Relay (3 Outputs) K31-C2: Relay (5 Outputs) Outputs (5 A max. at 250 VAC) H 18 19 PASS 20 21 Outputs (5 A max. at 250 VAC) H HH L 22 23 24 25 26 K31-C5: Relay (5 Outputs) 18 LL PASS 19 20 21 L 22 23 24 25 26 K31-T1: Transistor (NPN Open Collector) Outputs (5 A max. at 250 VAC) H Outputs (50 mA max. at 24 VDC) LL PASS L 18 19 20 21 22 p 19 20 24 25 26 ( H PASS L LL COM 21 22 23 24 25 26 4 8 K31-L1, L2, L3,-L4, -L5, -L6, -L7, -L8, -L9, -L10: Linear 20 Note: LL COM 24 25 26 1 2 4 8 1 2 4 8 1 2 4 8 1 2 4 8 1 2 100 COMMON 101 102 HH H PASS L LL COM 21 22 23 24 25 26 104 K31-FLK1: RS-232C 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 SG With K31-L4/-L5/-L6/-L9/-L10 models, terminals 19 and 26 are connected internally. K31-FLK2, -FLK5: RS-485 (Terminals 21 to 26 are provided only on K31-FLK5.) K31-FLK3, -FLK6: RS-422 (The right connector is provided only on K31-FLK6) Output NPN Tr. (50 mA max. at 24 VDC) Terminator Outputs (50 mA max. at 24 VDC) OFF HH H PASS L LL COM 20 21 22 23 24 25 26 Terminator ON 6 7 8 9 1 2 3 4 5 OFF SG RDB 19 ON SDB RS-485 + − SDA RDA RS-422 18 103 Outputs (50 mA max. at 24 VDC) SD RD 19 L 23 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 (Terminals 21 to 26 are provided only on K31-L4, -L5, -L6, -L9, -L10.) 18 PASS 22 ) HH 104 L1, L4: 4 to 20 mA L2, L5: 1 to 5 V L3, L6: 1 mV/10 digit L7, L9: 0 to 5 VDC L8, L10: 0 to 10 VDC + − H 21 LL 18 23 20 6 7 8 9 1 2 3 4 5 HH H COM PASS L 18 19 HH DATA OVERFLOW DATA VALID RUN COMMON REQUEST MAX. REQ. MIN. REQ. HOLD RESET POLARITY HH H PASS L LL COMMON HH Output NPN Tr. (50 mA max. at 24 VDC) LL RS-232C Panel indicators K31-FLK4: RS-232C + Transistor (NPN Open Collector) 9 8 7 6 5 4 3 2 1 L PASS COM H HH SD RD 9 8 7 6 5 4 3 2 1 SG • D-sub 37P Connectors for BCD output (attachment) Plug: XM2A-3701 Hood: XM2S-3711 • D-sub 25P connectors for RS-232C output (K31-FLK1) (order separately) Plug: XM2A-2501 Hood: XM2S-2511 • D-sub 9P connectors for RS-422 output (K31-FLK3 and K31FLK6) (order separately) Plug: XM2A-0901 Hood: XM2S-0911 • D-sub 9P connectors for RS-232C output (K31-FLK4) (order separately) Plug: XM2D-0901 Hood: XM2D-0911 Frequency/Rate Meter K3NR K-135 ■ Block Diagram Key switch LED Power supply for sensor Sensor A Sensor B GND Input circuit Control input Control input circuit Control power supply Power supply circuit K-136 Frequency/Rate Meter K3NR Frequency measurement circuit 8-bit microcomputer Output circuit Waveform adjustment circuit Voltage stabilizing circuit Power supply for sensor (input circuit) Voltage stabilizing circuit Frequency measurement circuit Waveform adjustment circuit 8-bit microcomputer Voltage stabilizing circuit Control input circuit Operation ■ Main Functions Output Pattern Selection c-out Startup Compensation Time stime The patterns of comparative output are selectable according to the level change. Select the pattern according to the application. The startup compensation time parameter keeps the measurement operation from sending an unnecessary output corresponding to instantaneous, fluctuating input from the moment the K3NR is turned ON until the end of the preset period. Standard Output Set value HH The compensation time can be set in a range from 0.0 to 99.9 seconds as the waiting time until the devices subject to measurement become stable after the startup of the power supply. Set value H Set value L Set value LL Display ON OFF Comparative output HH Comparative output H Startup compensation time Set value L PASS Comparative output L Comparative output LL Time 00000 displayed Zone Output Set value HH Power supply Set value H Set value L Comparative output L Set value LL Hysteresis hys ON OFF Comparative output HH Comparative output H The hysteresis of comparative outputs can be set to prevent the chattering of comparative outputs. Refer to page 152 for more details. PASS Linear Output Range lset Comparative output L Comparative output LL A linear output range can be set as required. A value corresponding to the maximum output value and that corresponding to the minimum output value can be set. Level Output Set value HH Set value H Set value L Set value LL Comparative output HH For the 4- to 20-mA output type ON OFF Comparative output H Output 20 mA 4 mA Comparative output L PASS Note: The following setting conditions must be satisfied, otherwise no zone output will turn ON correctly. LL < L < H < HH Lower limit Upper limit Display Remote/Local Selection r-l Select remote programming when performing all settings through the host devices and select local programming when performing settings through key operation. Process Time for Averaging Measured Value Process time for averaging measured value is the time over which the measured values will be averaged. If this time is shorter than the input pulse interval, processing will be based on the input pulse interval. Frequency/Rate Meter K3NR K-137 Panel indicators Comparative output LL ■ BCD Output Timing Chart A request signal from an external device (such as a Programmable Controller) is required to read BCD data. Single Sampling Data Output Pulse with a width of no less than 20 ms. (no more than 50 ms.) REQ. Max. Min. DATA All data "high" Data All data "high" DATA VALID 40 ms Approx. 30 ms 16 ms Approximately 30 ms after the REQ signal rises, a sample is taken and the DATA VALID signal is output. Read the data when the DATA VALID signal is ON. The DATA VALID signal will turn OFF in 40 ms, and then in 16 ms, the data will go OFF. Models with a BCD output have an open collector output configuration so that wired-OR connection is possible. REQ. (1) K3NR (1) Programmable controller REQ. (1) REQ. (1) K3NR (2) DATA (incl. POL and OVER) and DATA VALID are wired-OR processed. The RUN, HH, H, PASS, L, and LL signals are always output regardless of the status of the REQ signal. Do not OR-wire these signals. K3NR (3) DATA (1) (2) (3) DATA VALID * * * *The period between the DATA VALID signal and the REQ signal should be no less than 20 ms max. Continuous Data Output REQ. Max. Min. DATA All data "high" Data 1 Data 2 DATA VALID 40ms Approx. 30 ms 64ms 24ms 40ms 64ms 24ms The K3NR outputs each measurement at an interval of 64 ms when a REQ signal is ON continuously. If the HOLD signal is ON at the moment the DATA output is switched from Data 1 to Data 2 or vice versa, the output BCD data will be either Data 1 or Data 2 according to the timing of the HOLD signal. However, output data will never be below. K-138 Frequency/Rate Meter K3NR Example of Connection to Programmable Controller K3NR PC (SYSMAC) DC Input Unit 1. COMMON COM 2. 1 IN 3. 2 IN IN 5. 8 IN Internal circuit 100 4. 4 23. DATA VALID 24. RUN IN IN 25. COMMON Transistor Output Boards 26. REQUEST OUT 30. RESET OUT 240 Ω 240 Ω 31. POLARITY (Polarity: +, −) COM (0 V) 24 VDC +24 V DC power supply 0V Panel indicators 240 Ω Internal circuit 240 Ω Internal circuit +5 V Frequency/Rate Meter K3NR K-139 Example of Connection to Display Unit K3NR 1.COMMON 2.1 3.2 100 4.4 5.8 23.DATA VALID 24.RUN 101 102 25.COMMON 26.REQUEST +5V Connected 240 Ω 240 Ω 240 Ω 31.POLARITY (Polarity: +, −) V O D C B A DP LE V O D C B A DP LE V O D C B A DP LE V O 30.RESET 240 Ω 8 8 8 M7E-01D@N2 or M7E-01H@N2 M7E Digital Display Unit K-140 Frequency/Rate Meter K3NR SEC Nomenclature 1. SV Display 7. Status Indicators 2. PV Display 3. Comparative Output Status Indicators 4. SV Display Status 8. Teaching Indicator 5. ESC Key 9. RESET/TEACH Key 6. Mode Key 10. Up Key and Shift Key Name Functions 1. SV display Displays the set value or parameter. Available for Set Value LED Models only. 2. PV display Displays the process value in addition to the max./min. value or parameter. 3. Comparative output status indicators Displays the status of comparative output. 4. SV display status Indicates which comparative set value is currently on the SV display. 5. ESC Key Used to return to the RUN mode from the Setting, Protect, or Maintenance mode. The process value, maximum value, or minimum value to be displayed can be selected. 6. Mode Key Used to enter the Setting mode. Used to allow the PV display to indicate set values sequentially. Available for Basic Models only. Used to indicate set values sequentially on the SV display. Available for Set Value LED Models only. 7. Status indicators HOLD: MAX: MIN: PROG: 8. Teaching indicator Lit when the teaching function is enabled and flashes when the K3NR is in teaching operation. 9. RESET/TEACH Key The maximum value, minimum value, and counting values are reset by pressing this key. Teaching is available when the teaching function is enabled. 10. Up Key and Shift Key The digit being set is scrolled by pressing the Shift Key. The set value increases by one whenever the Up Key is pressed. Panel indicators Lit when HOLD input is ON. Lit when the maximum value is indicated on the PV display. Lit when the minimum value is indicated on the PV display. Lit or flashes while parameters are being set. Frequency/Rate Meter K3NR K-141 Engineering Data Max. current (mA) Derating Curve for Sensor Power Supply Note: The derating curve shown is for standard installation. The derating curve depends on the mounting direction. Ambient temperature (°C) K-142 Frequency/Rate Meter K3NR Dimensions Note: All units are in millimeters unless otherwise indicated. PV Display 14.2 8.2 Panel Cutouts 45+0.8 −0 92+0.8 −0 75 min. Note: The K3NR uses M3.5 terminals. A terminal cover is provided. Panel indicators 120 min. Frequency/Rate Meter K3NR K-143 Precautions !WARNING Do not touch any of the terminals while the power is being supplied. Doing so may result in electric shock. !Caution Do not allow metal objects or conductive wire cuttings to enter the product. Doing so may result in electric shock, fire, or malfunction. !Caution Do not attempt to take the product apart or touch any internal parts while the power is being supplied. Doing so may result in electric shock. !Caution Do not use the product in locations subject to flammable or explosive gases. Doing so may result in explosion. !Caution The lifetime of output relays varies greatly with the switching capacity and conditions. Consider the actual operating conditions, and use the relays within the rated load without exceeding the number of operations specified as the rated electrical life. Using relays beyond their rated electrical life may result in contact deposit or burning. !Caution Do not use loads exceeding the rated value. Doing so may result in damage or burning. !Caution Use a power supply voltage within the specified range. Not doing so may result in damage or burning. !Caution Use settings that are appropriate for the control system. Discrepancies between the settings and the actual control conditions may result in unexpected operation leading to damage or accidents. !Caution Be sure to tighten terminal screws to the specified torque. Specified torque for M3.5 screws: 0.74 to 0.90 N·m Loose screws may result in burning or malfunction. ■ Application Precautions • Use a power supply voltage within the specified range. Not doing so may result in damage or burning. • Be sure to perform wiring correctly, verifying the terminal names. Incorrect wiring may result in burning. • Be sure to tighten the screws on the terminal block properly. • Do not connect anything to unused terminals. ■ Correct Use Long-term Use Use all products within the specified ranges. When using inside a control panel, ensure that the temperature around the product, rather than the temperature around the control panel, does not exceed the specified temperature range. Electronic products, such as this product, have a lifetime that is dependent on the lifetime of internal electronic components, as opposed to the lifetime related to the number of relay switching operations. The lifetime of these components varies with the temperature; the higher the temperature, the shorter the lifetime. Therefore, the product lifetime can be extended by lowering the internal temperature of the product. When several Frequency/Rate Meters are mounted close together (either horizontally or vertically), the internal temperature of the Frequency/Rate Meters may rise, leading to a reduction in the lifetime. In this case, take measures to cool the Frequency/Rate Meters, such as installing fans. Ensure, however, that the terminals are not cooled as this may lead to incorrect measurement. Operating Environment Do not use the product in locations subject to temperatures or humidity levels above the specified ranges, or in locations subject to condensation. Do not use the product in locations subject to severe shocks or vibrations. Separate the product from machines that generate high-frequency noise, such as high-frequency welding machines and high-frequency sewing machines. Do not use the product in locations subject to dust or corrosive gases. Do not use the product outdoors or in locations subject to direct sunlight. Operation When using models with comparative outputs, if an error occurs at the Frequency/Rate Meter, comparative output may not operate correctly. We therefore recommend that you consider providing an alarm system separately as a countermeasure. Parameter settings that allow the functions to operate properly are made, using the setting menu, at the factory prior to delivery. When using the product, change the settings as required for the application. Mounting Recommended panel thickness is 1 to 3.2 mm. Panel K-144 Frequency/Rate Meter K3NR Attach the mounting bracket on the left and right sides of the Frequency/Rate Meter as shown in the illustration above and gradually tighten each screw evenly in turn by considering the balance of the tightening force until the ratchets start slipping without being further tightened. Unit Label (Provided) No product is shipped with the unit label attached. Select a unit label from the sheet provided and attach it to the Frequency/Rate Meter. Mount the Frequency/Rate Meter as horizontally as possible. Waterproof Specifications Products for which the degree of protection is not specified or models with IP@0 degree of protection do not have waterproof specifications. Noise Countermeasures Separate the product as far as possible from machines that generate high-frequency noise, such as high-frequency welding machines and high-frequency sewing machines, and machines that generate surges. Attach surge absorbers or noise filters to noise-generating peripheral devices (in particular, devices with inductance such as motors, transformers, solenoids, and magnet coils). Signal input + − K3NR K3NR Power input Power input Line filter Surge absorber In order to prevent inductive noise, wire the lines connected to the terminal block separately from power lines carrying high voltages or large currents. Also, do not wire in parallel to, or in the same cable as power lines. There are other methods that are effective for reducing noise, such as running wires along ducts and using shield lines. When using a noise filter for the power supply, check the voltage and current and install as close to the Frequency/Rate Meter as possible. Inductive Noise Countermeasure for Input Line Analog Input + Signal input Processor − Two-conductor shield wire Temperature Input Panel indicators In order to prevent the influence of induction, separate the lead wire joining the temperature sensor and the Frequency/Rate Meter from power and load lines. Using the product near radios, television sets, or other wireless devices may result in reception interference. Frequency/Rate Meter K3NR K-145 Operating Procedures ■ Operation in RUN Mode Reset (Enabled in operating mode 7 only.) Bank Selection BANK1 The incremental display value can be reset using key operations. BANK2 Display value COM • Switch between the comparative set values and the prescaling values for banks 1 to 4 using the BANK 1 and BANK 2 signals. • The relationship between the BANK 1 and BANK 2 signals and the bank numbers is shown in the following table. Incremental value Incremental value after reset Bank number Reset input RESET during incremental display to • Press the RESET/TEACH Key /TEACH reset the incremental value and continue incremental counting operation. RESET is not possible if reset of • Reset using the RESET/TEACH Key /TEACH counting values was prohibited in Protect Mode. BANK 1 BANK 2 1 OFF OFF 2 ON OFF 3 OFF ON 4 ON ON Comparat Prescaling ive set value value sU1.** sU1. sU2.** sU2. ps1.** ps1. ps2.** ps2. sU3.** sU3. sU4.** sU4. ps3.** ps3. ps4.** ps4. Checking the Bank Number Note: If the prescale value bank is set to OFF, then the prescaling value for each bank is fixed. Press the Shift Key for 1 s min. during measurement to display the bank number in the PV display. (The display will return to the measurement value if there is no key operation for 5 seconds.) Confirming Maximum and Minimum Values Press the ESC Key during measurement to display the maximum and minimum values. Maximum value Measurement value Minimum value RESET Press the RESET/TEACH Key /TEACH while the maximum or minimum value is displayed to reset the value. (This is not possible, however, if maximum/minimum value reset was prohibited in Protect Mode.) Confirming and Setting Comparative Set Values When the measurement value, the maximum value, or the minimum value is displayed, press the Mode Key repeatedly to display the comparative set values in the order HH, H, L, and LL. (With models that have an SV display, the comparative set values are displayed in the SV display.) Measurement value Maximum value Minimum value Comparative set value HH Comparative set value H No key operation for 5 s Comparative set value L No key operation for 5 s Note: When a comparative set value is displayed, it can be changed using the Up Key K-146 Frequency/Rate Meter K3NR Comparative set value LL No key operation for 5 s and Shift Key No key operation for 5 s (if key protection is OFF). ■ Setting Procedures The K3NR has four modes: RUN mode for normal operations, Setting mode for initial parameter input, Protect mode for lock-out configuration, and Maintenance mode for initializing set values. The parameters that are accessible on any individual K3NR will vary depending on the Output Board installed. Refer to the K3NR Operation Manual for details. RUN Mode: Remains in this mode under normal operation. The process value or the max./min. value can be monitored. Using the front panel keys, the comparative set value can be changed and max./min. value and counting value reset can be performed. Setting Mode: Used for making initial settings. Includes settings for four menus (Set value (sUset sUset), pscl), setup), opt)) sUset prescaling (pscl pscl setup (setup setup option (opt opt and the output test. Protect Mode: Used for locking the front key operation or parameter changes. Maintenance Mode: Used for initializing set values. When power is ON + Power ON Maintenance mode ESC RUN mode ESC + 1s 1s ESC ESC Protect mode Setting mode s.bank Select bank no. of set values sU*.hh sU .hh Enter set value HH of bank 1 sU*. sU . h Enter set value H of bank 1 sU*. sU . l Enter set value L of bank 1 sU*. sU . ll Enter set value LL of bank 1 Note: The above is an example when the bank number is set to 1. prot - Program lock-out configuration all sUset reset mm.rst secr pscl - Display prescaling p.bank Select bank no. of prescale values ps*.ax ps .ax Set the mantissa (X) of the prescale value of input A ps*.ay ps .ay Set the exponent (Y) of the prescale value of input A ps*.bx ps .bx Set the mantissa (X) of the prescale value of input B ps*.by ps .by Set the exponent (Y) of the prescale value of input B Select decimal point decp.* decp. Note: The above is an example when the bank number is set to 1. setup - Program operating mode/input sensor/serial communications Specify operating mode func Select a sensor type of input A ina Select a sensor type of input B inb =ro.ax Set the mantissa (X) of the auto zero time of input A =ro.ay Set the exponent (Y) of the auto zero time of input A =ro.bx Set the mantissa (X) of the auto zero time of input B =ro.by Set the exponent (Y) of the auto zero time of input B opt - Supplementary settings related to display or control Set the process time for averaging measured value aUg stime Set startup compensation time Select power failure memory function memo Enter hysteresis value hys c-out Select the output pattern lset.h Enter the upper limit (H) of linear output range lset.l Enter the lower limit (L) of linear output range Select the remote/local programming r-l time u-no bps len sbit prty Enable all key protection Enable set value change prohibition Enable prohibition of counting value reset using the front panel keys Enable prohibition of max./min. value reset using the front panel keys Specify the menus to be protected against setting in the setting mode Select the display time unit Enter the unit no. for the host Select the baud rate Select the word bit length Select the stop bits Select the parity bits Panel indicators sUset - Program set values test - Generating simulated input for testing the output function Frequency/Rate Meter K3NR K-147 ■ Initial Settings ■ Parameters Power ON Press the Mode Key Mode. Power ON for 1 s min. to move to the Setting Press the ESC Key for 1 s. RUN Mode and Up Key Refer to Operation in RUN Mode. Select the setup menu ( ) with the Mode Key and set the operating mode, the input type, and other settings. Setting Mode If required, set a prescale value in the prescaling menu ( ). 1s Set value menu Set comparative set values in the set value menu ( ). 1s Comparative set value bank Make settings in the option menu ( − No key operation for 5 s ) as required. (See note 4.) Comparative set value HH − No key operation for 5 s (See note 4.) If necessary, generate simulated input for testing the output function in output test ( ). Comparative set value H − No key operation for 5 s After completing all the settings, press the ESC Key return to RUN Mode. to (See note 4.) Output test Comparative set value L − No key operation for 5 s (See note 4.) Comparative set value LL Measurement starts. − No key operation for 5 s Prescaling To display rotational speeds, circumferential speeds, or other values based on input pulse calculations, the rotational speed must be multiplied by a factor input before the input pulses are measured. This factor is called a prescale value. K3NR Proximity Sensor Rotation speed (rpm) = f × 60 × a Where, f: Input pulse frequency (p/s) a: Prescale value If there are 5 pulses per rotation, then an accurate rotation speed can be calculated if a = 1/5 (= 0.2 = 2 × 10-1). In actual application, input as follows: Mantissa X = 2.0000 Exponent Y = 10-1 Auto-zero Time (Set before use.) In operation modes 1 to 6, the time to force-zero the frequency if no pulse is received for a specified period can be set. This time is called the auto-zero time. Set the auto-zero time to a value that is somewhat longer than the longest input pulse interval. (If the time setting is too long or if the factory-set value is used, the display may not return to zero even if no input pulse is received.) Time Unit Setting Setting Selecting the Sensor Type Meaning Minutes No-contact or voltage pulse input Minutes and seconds Contact input Hours, minutes, and seconds Note: The time unit can be set only if operating mode 6 (passing time) is selected. K-148 1s Process time for averaging measured value No key operation for 5 s Startup compensation time Note: If there are large discrepancies in the display select or . Note, however, that the maximum counting frequency is 30 Hz. Frequency/Rate Meter K3NR − No key operation for 5 s Power failure memory No key operation for 5 s Hysteresis − No key operation for 5 s Output pattern No key operation for 5 s Upper limit (H) of linear output range − No key operation for 5 s Lower limit (L) of linear output range NO: Voltage NC: Voltage pulse H pulse L Set in the prescaling menu Seconds Option menu − No key operation for 5 s Remote/local programming No key operation for 5 s Changing Set Values By pressing the Shift Key while a parameter is displayed, the set value can be changed (setting status). The PROG status indicator will flash. Change the set value as required, and press the Mode Key to register the setting and move to the next parameter. Setting Status func Protect Mode f1 Change the set value using the Up Key and the Shift Key . PROG flashes. If there is no key operation for Next parameter 5 seconds, the setting is registered and the parameter is displayed again. Setup menu Prescaling menu 1s 1s Prescale value bank (See note 1.) − No key operation for 5 s No key operation for 5 s (See note 4.) − Operating mode Input A sensor type Input A prescale value mantissa − − No key operation for 5 s No key operation for 5 s Input B sensor type (See note 2.) (See note 4.) No key operation for 5 s Input A prescale value exponent − − Input A auto-zero time mantissa No key operation for 5 s (See note 4.) Input B prescale value mantissa (See note 2.) (See note 4.) − No key operation for 5 s − − Input A auto-zero time exponent No key operation for 5 s Input B prescale value exponent (See note 2.) − − No key operation for 5 s Input B auto-zero time mantissa (See note 2.) − No key operation for 5 s − Decimal point − No key operation for 5 s Input B auto-zero time exponent (See note 2.) − No key operation for 5 s No key operation for 5 s Time unit (See note 3.) No key operation for 5 s Communications unit number − No key operation for 5 s Note 1: Set a number in the range 2 to 4 to set more than one prescale value (i.e., to display measurements in more than one unit). 2: These parameters will be displayed if F2, F3, F4, or F5 (i.e., operating mode 2, 3, 4, or 5) is set. 3: This parameter is displayed if F6 (i.e., operating mode 6) is set. If a parameter other than 5cal is set, the prescaling menu ( p5cl ) will not be displayed. Baud rate 1200/2400/4800/ 9600 /19200/38400bps No key operation for 5 s Word bit length 7 /8bit No key operation for 5 s Stop bits 1/ 2 bit No key operation for 5 s Parity bits / / Panel indicators • In the Setting Mode, measurement stops and all outputs turn OFF. • Depending on the output type of the model used, some parameters (indicated in ) are not displayed (and hence cannot be set). • If the operating mode is changed, the prescale values and linear output range parameters will be reset to their initial values. Set the operating mode first. 4. A number in the range 1 to 4 will be displayed. Settings displayed in reverse colors are defaults. Frequency/Rate Meter K3NR K-149 Power ON • Measurement stops in Protect Mode. • Depending on the output type of the model used, some parameters (indicated in displayed (and hence cannot be set). RUN Mode ) are not Press the ESC Key and Up Key for 1 s. Protect Mode Protect menu All key protection prot Set value change prohibition Reset prohibition sUset reset all Maximum/minimum value reset prohibition mm.rst Menus protected in Setting Mode secr 1s (See note.) Key-protection ON: kpon Key-protection OFF: kpoff Menu display Parameter display all prot Press the Mode Key to display the parameter. Setting: Next parameter: sUset Setting: Next parameter: reset Press the ESC Key to return to the menu. Setting: Next parameter: mm.rst Setting: Next parameter: secr Note: Press the Shift Key to make it possible to set or change parameters. Displayed only for models with comparative outputs. Setting: Next parameter: Meaning of parameter Setting range All key protection: All key operations are prohibited in RUN Mode. (If all key protection is ON, only the key for going to Protect Mode is enabled.) Use the Up Key to change the setting. ➤ kpon ➤ kpoff Use the Mode Key Set value change prohibition: to enable the setting and move to the Changes to comparative set values next parameter. are prohibited in RUN Mode. (Displayed only for models with comparative outputs.) kpon Key protection ON: Reset prohibition: Key protection OFF: kpoff Resetting using the front panel keys is prohibited. (Resetting by external signals is not prohibited.) Maximum/minimum value reset prohibition: Resetting of maximum and minimum values using the front panel keys is prohibited. (Resetting by external signals is not prohibited.) Use the Up Key to change the setting. Menus protected in Setting Mode: Setting operations in Setting Mode are prohibited in the way shown below. Setting menu 0 1 Option menu 2 × × Prescaling menu Setup menu × × × Note: If there is no key operation for 5 seconds, the setting is automatically registered. Frequency/Rate Meter K3NR ➤ Setting Set value menu K-150 Setting key (See note.) 0 /1/2 0 ➤ 1 ➤ 2 Use the Mode Key to enable the setting and move to the next parameter. ■ Troubleshooting When an error occurs, error details will be displayed in the PV display. Take the appropriate countermeasures according to the error displayed. Error display Error contents Output status Comparative output BCD output Countermeasure Communications output Linear output m1.err (M1.ERR) Memory error m2.err (M2.ERR) OFF OFF (all outputs in "H" status) OFF OFF Reset the power. If the same error occurs, repair is necessary. m3.err (M3.ERR) OFF OFF (all outputs in "H" status) OFF OFF Reset the power while holding down the ESC Key, the Up Key, and the RESET/TEACH Key. The settings will be returned to their initial values. Redo the settings. If the same error occurs, repair is necessary. OFF OFF (all outputs in "H" status) OFF OFF (minimum value) Reset the power. If the same error occurs, repair is necessary. If normal operation is restored, it is possible that the original error was caused by the influence of noise. Check that there are no sources of noise in the vicinity. Continues Continues Continues The OVER signal The OVER or UNturns ON. DER signal turns ON. Take steps to ensure that the input values and display values are within the allowable ranges. Continues If an attempt to change a setting using key operations is made with the remote/local selection set to remote, this error will flash for 3 s. To enable settings to be changed, set the remote/local selection to local. Output error (Display value flashes.) The input range and Continues display range were exceeded. The remote/local rmt (RMT) (Flashes for 3 s.) section is set to remote. Continues Continues Continues Panel indicators err-o (ERR-O) chg-o (CHG-O) Frequency/Rate Meter K3NR K-151 Additional Information ■ Output Operation Timing in RUN Mode (Relay or Transistor Outputs) The following timing chart is for a 5-comparative Output Board when the standard output pattern is selected. For Operating Mode 1 to 6 Display Display value HH set value HYS H set value HYS HYS L set value LL set value Hysteresis HYS HH comparative output H comparative output PASS output L comparative output LL comparative output Note: The hysteresis is set in setting mode and the hysteresis value will be applied to all set values. For Operating Mode 7 INA input RESET Display HH set value Display value H set value L set value LL set value HH comparative output H comparative output PASS output L comparative output LL comparative output Note: Comparative output L or LL turns ON when the measured value exceeds the set value. K-152 Frequency/Rate Meter K3NR ■ Operating Modes The K3NR provides 7 operating modes for converting input pulses to display values. The mode can be selected via key operations on the front panel. Basically, the operating modes can be divided into the following two groups. Operating Modes 1 to 6 Operating Mode 7 Rotational speed and other displays are based on calculations for continuous pulses (frequency). The number of pulses is measured. Each pulse is counted as 1 count up to a maximum of 99,999 counts. Decrementing the count is not possible. Although the limits of the display enables displaying only up to 99,999 counts, prescaling can be used to count up to 4 gigacounts. Example Processing Operating mode no. Conveyor line Use Pulse counting 07 The count is reset by shorting terminals 6 and 7 (RESET ON) or by pressing the RESET/TEACH Key on the front panel Operating mode no. Because only incrementing is possible, the L and LL comparative outputs turn ON when the measured values exceed set values. Use 01 Rotational/Circumferential speed 02 Absolute ratio 03 Error ratio 04 Rotation difference 05 Flow rate ratio 06 Passing time Mode No. 1: Rotational or circumferential speed display for 1 input Mode No. 2 to 5: Display of calculations for two rotational speeds Mode No. 6: Passing time display based on 1 input frequency and processing length Basic Principles of Rotational Speed Displays The ON/OFF time (T) of a sensor input or other input is measured with the internal system clock to automatically calculate the frequency. This frequency is multiplied by 60 and displayed as a rotational speed. Input sensor pulse ON/OFF time (T) = Frequency (f) = 1/T T Rotational speed (rpm) = f x 60 Circumferential speed = Circumference x Rotational speed Passing time = Processing length/Circumferential speed Automatic measuring by the K3NR is enabled simply by providing an input pulse. Operating Mode 1: Rotational/Circumferential Speed Units: rpm; rps; rph; Hz; kHz; mm/s; m/s; m/min; km/h; l/min; l/h; etc. Application Example Measuring Roller Winding Speed Measuring Motor Speed (for Product Testing) H PASS L Pass/fail determination Frequency/Rate Meter K3NR K-153 Panel indicators The frequency of input A is calculated and displayed as a rotational or circumferential speed. Operating Mode 2: Absolute Ratio Input B is divided by input A (B/A) and then multiplied by 100 for display as a percentage. Unit: Application Example Measuring Ratio between Rotational Speed of Two Rollers % Alarm HH H PASS L LL Operating Mode 3: Error Ratio The error between input A and input B (B/A − 1) is multiplied by 100 for display as a percentage. Unit: Application Example Measuring Difference between Two Line Speeds (Two Conveyors) % Communication output (remote monitoring) To computer Operating Mode 4: Rotational Difference The difference between input B and input A (B − A) is displayed as a rotational speed error or circumferential speed error. Application Example Units: rpm; rps; rph; Hz; kHz; mm/s; m/s; m/min; km/h; l/min; l/h; etc. Measuring the Absolute Difference between the Speeds of Two Conveyors Alarm HH H PASS L LL Operating Mode 5: Flow Rate Ratio Input A and input B are used to find the concentration (B/(A+B)) as a percentage. Unit: Application Example Monitoring the Concentration of a Liquid Mixture % Linear output Recorder K-154 Frequency/Rate Meter K3NR Operating Mode 6: Passing Time The pulse frequency of input A is calculated and is displayed as the passing time for a preset distance. Application Example Passing Time for a Conveyor Line Units: s; min; h, min, s; min, s, 1/10 s; etc. The passing time measurement operation in operating mode 6 is ideal for measuring time corresponding to a frequency change. Operating mode 6 allows the real-time, continuous time measurement of the revolutions of any rotating object without recovery time. Distance Alarm output Operating Mode 7: Pulse Counting Application Example The total number of pulses on input A is displayed. 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 Counting Workpieces Input A Input B BCD Hold input To PC Reset input 0 1 2 3 4 5 Units: count; mm; cm; m; l; kl; etc. 6 10 0 1 2 3 4 5 Note: The operation of comparative outputs in operating mode 7 is different to that in other modes. Because only incrementing is possible, the L and LL comparative outputs turn ON when the measured values exceed set values. Panel indicators Display Frequency/Rate Meter K3NR K-155 ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. Cat. No. N087-E1-02 K-156 In the interest of product improvement, specifications are subject to change without notice. Frequency/Rate Meter K3NR