1999 3157-01 AC GROUNDING HiTESTER Electronic Measuring Instrument CE certified low-resistance measurement compliant with major safety standards Protective ground tester indispensable for standard certification ISO14001 JQA-E-90091 The 3157-01 AC GROUNDING HiTESTER is designed to measure whether the metal enclosure of an electrical equipment is connected to the ground terminal at sufficiently low resistance levels. It also can be used to evaluate the grounding conditions of large-scale electrical installations. Measurement is carried out by using a high current according to the specifications of the measurement object, and determining the voltage drop at the measurement point. Reference values are as set out in the various safety standards. The 3157-01 can carry out measurements in accordance with the stipulations of multiple standards. http://www.hioki.co.jp/ HIOKI company overview, new products, environmental considerations and other information are available on our website. 1 Low-resistance measurements in accordance with all major Main applications safety standards The 3157-01 passes a large AC current through the measurement object and measures the voltage drop according to the AC 4-terminal method, making it possible to measure very low resistance values. ● Protective grounding checks of medical and general electrical equipment ● Ground connection tracing of machine tools and wiring panels ● Safeguard and equal-potential connection checks of medical installations ● High-current behavior evaluation of connections Major features ■ Compliant with a multitude of standards ■ “SOFT START” function The 3157-01 allows measurement as prescribed by most major safety standards. Using the 4-terminal method to measure the voltage drop for a high current, the unit offers evaluation features and a timer function to allow efficient standard compliance testing. The unit checks whether the probe is connected to the measurement object, and raises the output current to the preset value when a connection is detected. This serves to prevent sparks caused by connecting a live probe to a measurement object, thereby guarding against equipment damage and ensuring operator safety. ■ Constant-current testing (max. 31.0 A) with feedback control ■ Fluorescent tube display (VFD) The output current is controlled by a feedback loop to achieve stability, regardless of fluctuations in the load impedance. The display uses an easy to read fluorescent tube. Compared to conventional meters, the digital indication allows effortless reading of the data. ■ Test data count function For installations with many test points, the unit can automatically count the number of tests, to ensure that no points are missed. ■ Setting value store function Up to 20 settings can be stored, allowing quick switching between the various setups for different standards and legal requirements. ■ Light weight and compact dimensions Whereas conventional testing equipment required a trolley for transport, the 3157-01 can be easily carried with one hand. Its small dimensions, light weight, and ease of maintenance make it ideal for use in the field. [320 (W) × 90 (H) × 263 (D) mm 12.6" (W) × 3.56" (H) × 10.40" (D) 7 kg(247.2 oz)] Standards supported by the 3157-01 ●IEC60065 [S a f e t y r e q u i r e m e n t s f o r m a i n s o p e r a t e d electronic and related apparatus for household and similar general use] ●IEC60204-1 [Electrical equipment of industrial machines -Part1,General requirements] ●IEC60335-1 [Safety of household and similar electrical appliances - Part 1, General requirements] ●IEC60601-1 [Medical electrical equipment -Part 1, General requirements for safety] ●IEC60950 [Safety of data processing equipment, including office equipment] ●IEC61010-1 [Safety requirements for measurement, control, and laboratory electrical equipment] ●UL standard Relevant standards (UL 1012, UL 1270, UL 1409, UL 1419, UL 1437, UL 2601, etc.) 2 A multitude of functions in a compact body ■ Easy standard testing Measurement current ■ Measurement range Upper limit Load resistance [Ω] Measurement time Open terminal voltage 6 V line Preparation 1.8 Maximum output power 130 VA line Test condition file number 1.5 Remaining time For 6 A output, 6 V line yields Measurement 6 (V) 6 (A) 1.0 =1.0 [ Ω ] For 25 A output, 130 VA line yields Result PASS 130 (VA) =0.208 [ Ω ] 252 (A2) FAIL 0.5 Measurement range Measurement value 0 Measurement value 0 * If hold is not enabled, unit reverts to READY condition after 1 second. 10 20 30 Output current [ A ] ■ Versatile functions ➀ ➁ ➂ ➃ ➄ ➅ ➆ ➇ ➈ ➉ ➅ Test data count function (0: Disable/1: Enable) 11 Allows counting of test points for equipment with many test points. ➆ Buzzer setting (Pressing SHIFT + STOP keys allows the user to make settings for each function.) ➀ Output current frequency switching (0: 50 Hz / 1: 60 Hz) 1 2 3 ON OFF OFF ON Error ON OFF ON OFF ➇ Enable current control in test condition (0: No/1: Yes) Allows changing of the output current value while a test is in progress. ➁ PASS/FAIL hold function setting Determines whether the condition is held after detecting PASS or FAIL. 0 Evaluation 0 1 2 3 PASS NO YES NO YES FAIL YES YES NO ➈ Momentary out Enabling this function allows the current to be output only when the START key is pressed. 0: Disabled (trigger operation) 1: Enabled (momentary out operation) NO ➂ Hold function setting (0: Hold disabled / 1: Hold enabled) Holds the condition of the unit after the preset test time has elapsed or after the STOP key is pressed. ➉ Test mode 0: Soft start mode 1: Normal mode 2: Continuous test mode ➃ Use test lower limit setting (0: No / 1: Yes) Disabling the setting allows only the upper limit to be set. Enabling the setting allows also the lower limit to be set. ➄ Timer override (0: No / 1: Yes) Determines whether a test time can be set. If test time is not set, the test ends only when the STOP key is pressed or the result is FAIL. 11 Print function 0: Not used 1: Automatically print PASS/FAIL result 2: Optionally print in PASS/FAIL hold condition ■ External I/O The unit comes with I/O connectors as standard equipment. The connectors allow external START/STOP control, READY/TEST status checking, and PASS/FAIL result reading. Photocouplers are used to isolate the I/O signals from the internal circuitry. 9442 printer ■ External interface (option) The 9518-02 GP-IB interface or 9593-02 RS-232C interface can be installed in the unit. This allows remote control from a computer as well as export of measurement data. The 9593-02 RS-232C interface also allows connection of the 9442 printer for producing a hard copy of measurement data. Printing method Paper width Printing speed Power source : Thermal serial dot printer : 112 mm : 52.5 cps : 9443 AC adapter, or supplied nickel-hydride battery (Charged through 9443; printing capability approx. 3000 lines with full charge) * To use the 9442 printer, an optional 9593-02 RS-232C interface, 9446 connection cable, and AC adapter are required. 3 ■ 3157-01 Specifications ● Basic specifications : AC 4-terminal method resistance measurement Basic functions [ Generator section ] Current generator principle Current setting range Accuracy Maximum output power Open-terminal voltage Generator frequency SOFT START function : PWM constant current control : 3.0 A - 31.0 A AC (0.1 A resolution), into 0.1W load [ Timer section ] : ± (1% of setting + 0.2 A) within maximum output power range : 130 VA (at output terminals) * Setting ON Setting OFF Setting range * Subject to derating according to ambient temperature [80% at 40˚C (104˚F)] : Max. 6 V AC : 50 Hz or 60 Hz sine wave (selectable) : : : Setting resolution : : Accuracy Counts down time after start until preset time Shows elapsed time after start 0.5 - 999 s 0.1 s (0.5 - 99.9 s)/ 1 s (100 - 999 s) ±50 ms (0.5 - 99.9 s)/±0.5 s (100 - 999 s) [ Other functions ] : Apply current only after checking load connection [ Monitor section ] Resistance measurement range Accuracy Current monitoring range Accuracy Voltage monitor : 0 - 6.00 V AC (single range 0.01 V resolution) range Accuracy : ± (1% rdg.+5 dgt.) Monitoring cycle : 0.5 s : 0 - 1.800W (0.001W resolution) Comparator function Comparator result output Zero-adjust function Zero-adjust range Memory function : PASS/FAIL evaluation using preset upper/lower limit Interfaces : 1. External I/O * Output signals: PASS /UP FAIL /LOW FAIL /TEST /READY .... open collector Input signals: START /STOP /External I/O ENABLE .... 5 - 24 V DC 2. Front EXT connector * External START/STOP input .... contact signal : ± (2% rdg. +4 dgt.) after zero-adjust : 0 - 35.0 A AC (0.1 A resolution) : Internal buzzer (PASS/FAIL, ON/OFF switchable) and I/O output : For measurement probe impedance cancellation : 0 - 0.100W : Max. 20 settings (with save/load) : ± (1% rdg. +5 dgt.) (at 3 A or more) ● General Specifications Display Ambient conditions for use Ambient conditions for storage Ambient conditions for assured accuracy Suitable environments Power supply voltage range : Fluorescent tube (digital display) : 0 to +40˚C (32 to 104˚F), 30 to 90% RH (no condensation) : -10 to +50˚C (14 to 122˚F), 10 to 95% RH (no condensation) : 23˚C ± 5˚C (71.3˚F ± 9˚F) 30 to 90% RH (no condensation) After 30-minute warmup period : Indoors, altitude up to 2000 m * When external start/stop connector is used, START key is inactive 3. RS-232C or GP-IB (option; one only) Remote control, measurement data output : 100 - 120 V/200 - 240 V AC (auto-switching) (When RMT indicator is on, operation keys are locked; only LOCAL, STOP, and external keys work) Dimensions Power line frequency : 50 - 60 Hz Withstand voltage Maximum rated power Fuse Compatible standards : 1.35 kV AC, 20 mA, 1 min., between power supply and chassis : 350 VA (with optional equipment) : 250VT3. 15AL : 1. EMC : EN55011:1991+A1:1997+A2:1996 Group1 CLASS A EN50082-1:1992 2. Safety : EN61010-1:1993+A1:1995 Contamination 2 Overvoltage category II (expected overvoltage category 2500 V) Mass Standard accessories : Approx. 320 (W) × 90 (H) × 263 (D)mm Approx. 12.6" (W) × 3.56" (H) × 10.40" (D) (Without protruding parts) : Approx. 7 kg/247.2 oz (without options) : Power cord, spare fuse (integrated in inlet), shorting bar × 2 (current output - voltage sensing terminal) 3157-01 AC GROUNDING HiTESTER *For measurement, two 9296 or one each of 9296 and 9297 are required. ■ Options 9296 CURRENT PROBE 9297 CURRENT APPLY PROBE 9296 Length: approx. 1.5 m (59.3") 9297 9518-02 GP-IB INTERFACE 9593-02 RS-232C INTERFACE 9442 PRINTER 1196 RECORDING PAPER(25m, 10 rolls) 9443-02 AC ADAPTER(for printer, EU) 9443-03 AC ADAPTER(for printer, America) 9446 CONNECTION CABLE(for printer) Length: approx. 1.5 m (59.3") * 9296/9297 use dual wiring up to the probe tip. DISTRIBUTED BY ASM GmbH Am Bleichbach 18 - 22 85452 Moosinning / Germany All information correct as of Jan. 14, 1999. All specifications are subject to change without notice. ■Inter net HIOKI website h t t p : / / w w w . h i o k i . c o . j p / F3157E1-91M-03K Printed in Japan