User’s Guide
Dual Input, 3-Display Thermometer/Datalogger
Model 421509
•
Accepts J, K, T, E, R, S, & N thermocouples
•
Internal Memory stores up to 16 data sets,
with 1024 maximum data capacity
•
Backlit Electro-luminescent LCD Display
•
T1 / T2 / T1 – T2 displays
•
MIN / MAX / AVG Record/Recall
421509
APO
¡F T1
K
ESC -
•
¡F T1-T2
0
ENTER
¡C/¡F
[Limits]
[INVT]
1
SAVE
READ
•
T1
2
LOG
READ
4
Selectable temperature units (C/F)
Data Hold, Relative Mode, Elapsed Timer
REL
HOLD
5
[APO]
MAX/MIN
3
CLR ?
SET[ ]
6
SHIFT
[OFS]
7
8
9
TYPE
T1/T2
TYPE
T1/T2
[TIME]
T1-T2
SECOND
THIRD
MAIN
DISPLAY
•
Bi-directional RS-232 PC Interface
Introduction
Congratulations on your purchase of Extech’s Dual Input, 3-Display, Hand-Held Digital
Thermometer/Datalogger. This portable digital thermometer is designed to use external K /
J / T / E / R / S / N type thermocouples (K-type supplied). Temperature indication follows
Reference Temperature/Voltage Tables (N.I.S.T. Monograph 175 Revised to ITS-90). It
features an adjustable T/C offset and an RS-232 interface for uploading data to a PC using
optional software and cable. This professional meter, with proper care, will provide years of
safe reliable service.
Specifications
General Specifications
Display
Input Protection
4-1/2 digit (19,999), 3-Display, LCD with EL Backlighting
24VDC or 24VAC rms maximum input on any combination of
inputs. Max voltage between T1 and T2 inputs is 1V
Reading rate
Input connectors
Alarm Output
Operating conditions
Storage conditions
Dimensions / Weight
2.5 times per second
Accepts standard sub-miniature thermocouple connectors
6-pin mini DIN, max. 5mA@5 to 30VDC (external source)
o
o
32 to 122 F (0 to 50 C); less than 80% RH
o
o
-4 to 140 F (-20 to 60 C); less than 70% RH
7.5 x 3.6 x 2.1” (192 x 91 x 52.5mm); 11.7oz. (365g)
Power Supply
Auto Power off
Battery life
9V battery or optional AC Adaptor
User programmable from 5 to 19999 minutes
100 hours typical
Range Specifications
Thermocouple
K type
Range
o
o
-328 to 2501 F (-200 to 1372 C)
J type
-346 to 2192 F (-210 to 1200 C)
T type
E type
R type
S type
N type
-328 to 752 F (-200 to 400 C)
o
o
-346 to 1832 F (-210 to 1000 C)
o
o
32 to 3212 F (0 to 1767 C)
o
o
32 to 3212 F (0 to 1767 C)
o
o
-58 to 2372 F (-50 to 1300 C)
o
o
o
o
Resolution
o
o
0.1 F (0.1 C),
o
1 F > 2000°
o
o
0.1 F (0.1 C),
o
1 F > 2000°
o
o
0.1 F (0.1 C)
o
o
0.1 F (0.1 C)
o
o
1 F (1 C)
o
o
1 F (1 C)
o
o
0.1 F (0.1 C)
Accuracy Specifications
Thermocouple
K, J, T, E types
N type
R, S types
Temperature
Coefficient
Supplied
Thermocouples
Accuracy
o
o
o
±(0.05% rdg + 0.6 F) -58 F to 2501 F
o
o
o
±(0.05% rdg + 1.4 F) -58 F to -346 F
o
o
o
±(0.05% rdg + 0.3 C) -50 C to 1370 C
o
o
o
±(0.05% rdg + 0.7 C) -50 F to -210 C
o
o
o
±(0.05% rdg + 1.6 F) -58 F to 32 F
o
o
o
±(0.05% rdg + 0.8 F) 32 F to 2372 F
o
o
o
±(0.05% rdg + 0.8 C) -50 C to 0 C
o
o
o
±(0.05% rdg + 0.4 C) 0 F to 1300 C
o
o
o
±(0.05% rdg + 4.0 F) 32 F to 3212 F
o
o
o
±(0.05% rdg + 2.0 C) 0 C to 1767 C
o
o
o
o
0.1 multiplied by the accuracy per C from 0 C to 18 C and 28 C to
o
o
o
o
o
50 C (32 F to 64 F and 82 F to 122 F)
o
o
4', type K (with teflon insulation) Max insulation temp: 500 F (260 C)
o
o
Accuracy: ± 4 F (±2.2 C) or ± 0.75% of rdg (whichever is greater)
o
o
from 32 to 1472 F (0 to 800 C)
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421509 Version 2.0 10/07
Safety Information
Please read the safety and operational instructions before using this device.
WARNING
To avoid electrical shock, do not use this instrument when working near voltages over 24V
AC/DC.
WARNING
To avoid damage or burns, do not make temperature measurement in microwave ovens.
CAUTION
Repeated flexing can break the thermocouple leads. To prolong lead life, avoid sharp
bends in the leads, especially near the connector.
This symbol on the instrument indicates that the operator must refer to an
explanation in this manual.
!
Meter Description
1
2
3
1.
Optical RS-232 Interface
2.
Thermocouple inputs
9
421509
APO
3.
4
Mini DIN I/O port
¡F T1
K
4.
Triple LCD Display
5.
Keypad Overlay
T1
5
ESC -
¡F T1-T2
0
1
6.
6
Keypad
SAVE
READ
Protective rubber holster
Battery compartment on rear
9.
12VDC Adaptor input
7
[INVT]
3
LOG
READ
5
CLR ?
SET[ ]
6
[APO]
MAX/MIN
SHIFT
[OFS]
7
8
9
TYPE
T1/T2
TYPE
T1/T2
[TIME]
T1-T2
SECOND
THIRD
MAIN
8.
2
4
REL
HOLD
7.
ENTER
¡C/¡F
[Limits]
DISPLAY
8
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421509 Version 2.0 10/07
Operation
There are three operation modes—Normal, Shift, and Setup mode
Normal Mode
This is the default mode. The operating functions for normal mode are printed on the face
of each button in white. The following functions can only be used in Normal Mode.
Power Button
The Power key turns the thermometer ON or OFF. When entering data in Setup Mode, the
power off function is disabled.
[Limits] Button
The Limits function will alert the user when a measurement exceeds a specified limit. To
set the limit values, refer to the limits function in the Setup Mode. Press the [Limits] button
to activate the Limits function ("LIMIT" will be displayed on the LCD). When the measured
temperature on the main display is higher than the High Limit (or lower than the Low Limit),
the alarm beeper emits a tone and "Hi" “or “Lo” is displayed. Note: The tones for High and
Low Alarms are different; the High Alarm tone is pulsed while the Low Alarm tone is
continuous. Note: When reading over 2000°F using a K or J thermocouple, the reading
should be multiplied by 10. (example: 2100°F x 10 = 21000). To exit the Limits function,
press the [Limits] button. In this mode, the automatic power-off feature is disabled along
with the following keys: REL, HOLD, & MIN MAX.
Backlight Button
Press the backlight button to toggle the backlighting on and off. The backlight will switch-off
automatically after 60 seconds to conserve battery life.
SAVE/READ Button
The Read data function is used for reading saved data. It works in conjunction with the
Save function in the Shift Mode.
1. Press the SAVE/READ button to activate the read data function. The word READ will
be displayed on the LCD.
2. Press the “SECOND” button until the # sign is displayed in the bottom left display.
The location of the read pointer within the saved data table will be displayed.
3. Press the “▲3” or “▼6” button to display the next data location.
Press the “▲2” or “▼5” button to increment the data location by ten.
4. Press the overlay “ESC” button to deactivate the read data function.
LOG/READ Button
The read log function is used for reading logged data. It works in conjunction with the Log
function in Shift Mode.
1. Press the LOG/READ button to activate the read log function. The word READ will be
displayed in the lower right display.
2. Press the overlay “SECOND” button to rotate through the following display menus:
T1, T2, GRP, and #. T1 and T2 displays the T1 or T2 saved value. GRP displays the
current group number and # displays the current location of the read pointer within a
selected group.
3. The arrow buttons on the overlay are used for scrolling through the saved data.
Press the “▲3” or “▼6” buttons to display the next data location or group.
Press the “▲2” or “▼5” buttons to increment to the next data or group location by
ten. To navigate around the logged data and groups, press the overlay “SECOND”
button until “GRP” appears in the display. Select the group using the arrow buttons,
then press the “SECOND” button again until the “#” sign is displayed. The location of
the read pointer will be displayed. Use the arrow keys to scroll through the data.
4. Press the overlay “ESC” button to deactivate the read log data function.
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421509 Version 2.0 10/07
HOLD Mode (Main Display only)
Press the HOLD button to enter the Data Hold mode, the "HOLD" annunciator will display.
When HOLD is selected, the thermometer freezes the reading on the main display only.
Press the HOLD button again to return to the normal measurement mode.
MIN/MAX with Time Record Mode (Main Display only)
Note: Auto Power OFF and several keys (Power, C/F, REL, SET, HI/LO, TYPE, and T1,
T2, T1-T2) are defeated in this mode
Press MIN MAX to enter the MIN/MAX recording mode; the meter will begin keeping track
of the highest (MAX), lowest (MIN), MAX-MIN, and Average (AVG) readings. There are
four displays (listed below) for this mode. Use the MIN MAX key to scroll through all four.
1. When the “REC” icon is on the display (top), the meter is displaying measurements
normally while it is recording.
2.
With the “REC MAX” icon on the display, the meter continues taking measurements
but the main display shows only the highest (MAX) reading recorded. The Elapsed
Time (in hours, minutes, and seconds) is shown in the lower right LCD field. The
Timer shows when the MAX reading was taken.
3.
With the “REC MIN” icon on the display, the main display shows only the lowest
reading recorded. The Time of the MIN reading is shown in the lower right LCD field.
4.
With the “REC MAX-MIN” icon on the display, the main display shows the difference
between Max and Min.
5.
With the “REC AVG” icon on the display, the main display shows only the average of
all the readings recorded. Note that the averaging limit is 22 hours. After 22 hours, the
last average reading display is held on the LCD.
The meter emits a tone when a new minimum or maximum value is recorded. Use the
HOLD button to pause recording (all values are then held). Press HOLD again to resume
recording. To exit the MIN MAX mode press and hold the MIN MAX button for more than 2
seconds until the “REC” icon switches off.
T1/T2 Button (Main Display)
Press this button to select which thermocouple input configuration is represented on the
main display; ‘T1’ will display for thermocouple input 1 or ‘T2’ for thermocouple 2. When
the meter is turned on, it is set to the display that was in use when the meter was last
powered off.
T1/T2 (Second Display)
Press this button to select which input is shown on the secondary display (lower left
display); T1 for thermocouple 1 or T2 for thermocouple 2. When the meter is turned on, it is
set to the display that was in use when the meter was last powered off.
T1-T2/Time (Third Display)
Press this button to select system time, date, or the differential between the two
thermocouples (T1-T2) for the third display (lower right display). When the meter is turned
on, it is set to the display that was in use when the meter was last powered off.
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421509 Version 2.0 10/07
Shift Mode
The operating functions for the shift mode are printed in yellow on the buttons. When in
normal mode, push the SHIFT button to switch to shift mode. The word “Shift” will be
displayed in the lower right corner of the LCD. To switch back to normal mode, press the
SHIFT button again.
°C/°F Key
Readings can be displayed in degrees Celsius (°C) or degrees Fahrenheit (°F). Note that
the meter remembers the unit of measure when it is turned off. Press the °C/°F key to
change the temperature units.
SAVE Button
The save function stores T1 and T2 measurements in up to 128 locations in non-volatile
memory. Press the SAVE button to store the current reading, the word “SAVE” is
momentarily displayed on the bottom right LCD to indicate that the data has been saved.
Data can be read using the read function in normal mode.
LOG Button
The data log function continuously records measurement data using the stored sampling
interval. The time interval is set using the interval time setup function [INTV] in the setup
mode.
Press the LOG button to activate the log function. “LOG” will be displayed and “MEM” will
continuously flash on the LCD. There are 16 groups that are used for storing the log data
and each group has 64 data locations. If the current session exceeds 64 locations, the log
function will automatically use the next group to continue storing the data. A maximum of
1024 locations can be saved in one log session.
Press the LOG button again to exit the data log function.
CLR ? Button
The CLR function clears all the saved and logged data in memory. When the CLR button is
pressed, “MEM” is displayed and “CLR” flashes on the upper right of the LCD.
Press the overlay “ENTER” button to clear all saved and logged data, or the “ESC” button
to exit the function.
REL Button
Press the REL key to enter the Relative mode. The meter will store the displayed reading
(main display) as a reference value and display ‘REL’. All subsequent readings will now
display the measured value less the stored reference value.
Press the REL key again to exit the relative mode.
[APO] Button
Press the APO button to enable/disable auto power off. “APO” is displayed on the upper
left of the LCD. When enabled, it will automatically turn the thermometer off if the key
switch is inactive for the preset auto power off time (default time for APO is 5 minutes). The
time can be programmed in Setup Mode. Press the Power button to resume operation.
Type Button (Main display
Press the TYPE button to select the thermocouple type (K, J, T, E, R, S, or N) in the main
display. If the inputs of the main and second display are the same, then pressing this
button will change the thermocouple type for both displays. The selected type becomes the
default selection.
Type Button (Second display)
Press the TYPE button to select the thermocouple type (K, J, T, E, R, S, or N) in the
second display. If the inputs of the main and second display are the same, then pressing
this button will change the thermocouple type for both displays. The selected type
becomes the default selection.
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421509 Version 2.0 10/07
Setup Mode
The operating functions for the setup mode are printed between the bracket “[ ]” signs on
each button. Press the SET [ ] button in normal mode to switch to the setup mode. The
indicator “SET” will be shown on the left side of the display. Press SET [ ] again to return to
normal mode.
Hi/Lo Limit Setup
In Setup Mode, press the [Limits] button to enter the Hi/Lo setup function. The “LIMIT”,
“HI”, and main display will blink on the LCD and the previous settings will be displayed.
Press the number buttons (printed in white) on the overlay to set Hi and Lo limit values.
The button “-“ (same as the ESC overlay) can be used to set a negative value. Setting is
from left to right digit. Press the ENTER button to confirm each setting.
Mini DIN Hi/Lo Alarm Output
The alarm output jack (refer to Figure 1), located on the top of the meter, can be used to
power external warning or switching devices when programmed Hi/Lo alarm limits are
reached. To enable this function, an external power source (5 to 30VDC, 5mA max) must
be used to supply power to the connected device. Connect the power source (5-30VDC)
between pin 5 (+) and pin 6 (-) of the connector (refer to Figure 2). For the Hi limit output,
connect a device between pin 1 (+) and pin 2 (-) (refer to Figure 3). For the Lo limit output,
connect a device between pin 3 (+) and pin 4 (-) (refer to Figure 4).
Pin 5 (+)
Pin 6
Pin 5
Pin 4
Pin 3
Pin 2
Pin 1
5 to 30V
Pin 6 (-)
Figure 1
Figure 2
Pin 1 (+)
Pin 3 (+)
Hi Limit
Lo Limit
Pin 2 (-)
Pin 4 (-)
Figure 3
Figure 4
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421509 Version 2.0 10/07
Interval Time Setting
To set up the interval time for the log function, press the [INVT] button. The indicator “INV”
will blink at the top right of the LCD and previous settings are displayed. Press the number
buttons (printed in white) on the overlay to change the time setting. Setting changes from
left to right in the following format: HH:MM:SS. Press the ENTER button to confirm. Press
the “ESC” button to exit this function.
HH: 0-23
MM: 0-59
SS: 0-59
MAX: 23:59:59
MIN: 00:00:01
Auto Power Off Time Setting
Press the [APO] button in Setup Mode. The indicator “APO” and the main display will blink
on the LCD showing the previous setting. Press the number buttons (printed in white) on
the overlay to change the APO time. Press the ENTER button to confirm. To exit this
function without changing the setting, press the ESC button.
MAX: 19999 minutes
MIN: 0005 minutes
Thermocouple Offset Adjustment
To change the offset for T1, the main display input should be set to T1. Set the main
display to T2 for adjusting the offset to T2. Press the [OFS] button to enter the offset
adjustment mode. “CAL” will be displayed on the top right of the LCD and the main display
will blink showing the previous setting. Press the number buttons (printed in white) on the
overlay to change the offset. The resolution is 0.1°. Use the “-” button to set a negative
value. Press the ENTER button to confirm.
MAX: ±1999.9°C/°F
System Time Setting
To set or change the system time, press the [TIME] button in Setup Mode. The time and
date in the bottom right display will blink. Enter from left to right YY:MM:DD and
HH:MM:SS. Press the number buttons (printed in white) on the overlay to change the
settings. Press the ENTER button to confirm. Exit this function by pressing the ESC button.
Error messages:
If Err-02, Err-02 or Err-03 appears in the display, one of the following conditions has
occurred:
Err-01: In the “SAVE” mode, the maximum recording range is 128 samples. The lower
right display will show Err-01 if the maximum capacity of 128 samples has been reached.
Err-02: In the “LOG” mode, the maximum recording is 16*64=1024 samples. The lower
right display will show Err-02 if the maximum capacity of the 16 groups has been reached.
Err-03: In the “READ LOG” and “READ SAVE” mode, when the main display shows 6028
and the lower right display shows “OL, Err-03”, one of the following conditions has
occurred::
1. There is no data in the memory.
2. The memory is full, and the meter will warn the user this is the last sample.
SAVE=128 samples
LOG=1024 samples
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421509 Version 2.0 10/07
RS-232 PC Interface
The Model 421509 Thermometer is supplied with a sophisticated Windows® software
package on disk. A communications cable (meter to PC) is also supplied. The program allows
the user to operate the meter remotely and view the readings from all three LCD fields on the
PC monitor. The software also permits measurement data to be stored as text files on a PC.
The data files can then be exported to spreadsheet or other programs for further manipulation
(graphing, sorting, filing, etc.).
Connecting the Meter to a PC
Connect the Optical Interface connector to the 421509 Thermometer. The “IR2” label should
be facing up. Connect the 9-pin female connector to the 9-pin serial PC port (COM1-4).
PC Requirements
•
486-33 IBM compatible PC or better
•
One CD-ROM drive
•
Available serial port.
•
Windows 95, 98, 2000, NT, ME, XP Operating System
Installing the Windows Application Program
1. Place the supplied software CD in the PC CD-ROM drive and run setup.exe
2. Change the path if necessary or choose the “Finish” button to install the program to its
default location.
3. Launch the program by double clicking the program file in the location where it was
saved during installation.
4. Remember not to run the supplied software until the meter is properly connected to the
PC as described earlier.
Software Control Panel Description
Button
T1 INPUT
T2 INPUT
T1-T2
RECORD
READ DATA
START
STOP
WORKING
COM PORT
Description
Open the T1 input control window to activate function
Open the T2 input control window to activate function
Open the T1-T2 control window to activate function
Open the recording control window to activate data acquisition
Downloads the logged data from the meter
Press the “START” button to activate the meter’s serial port output and
then the auto-power-off function will be disabled.
Press the “STOP” button to stop the meter’s serial port output and then
the auto-power-off function will be enabled.
The “WORKING” sign will blink when the meter is communicating with
the PC, otherwise “RS-232ERR” will be displayed.
Select serial port (COM1 to 4)
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421509 Version 2.0 10/07
Operation
1. Select the correct COM port
2. Press the “START” button
3. Press the T1 INPUT, T2 INPUT or T1-T2 button to open the control window
Button
MAX MIN
AVG
REL
HI/LO
TYPE
GRAPH
Description
Activate Max/Min reading with time
Activate Average reading measurement
Activate Relative mode
Activate Hi/Lo limit comparative mode. The limit will also be visible
on the graphical display as red (HI) and blue (LO) horizontal lines.
The display value will blink between red and blue when the input
temperature value exceeds the LO value.
Select the K/J/T/E/R/S/N type thermocouple
Open the graph sub-window
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421509 Version 2.0 10/07
Record Function (Data Acquisition)
Button
FILE NAME
USER FILE
INTV
LIST
CLR
REC
Description
Select Default or User
Name for Data Acquisition
Saved in .xls format
Sample rate from 1 to
65535
Enter the number of the
lines from 200 to 65535
Clears the screen
Starts data
acquisition/Press OFF to
stop recording
Importing Data from the Meter
1. Click the READ DATA button
2. The window will open and the data stored in the meter’s memory will automatically
download to the PC. A red bar at the bottom of the screen will indicate the
download progress.
3. After the download is complete, select the Log Data tab to open the log window to
retrieve datalogged measurements, or Saved Data to open the save window for
manually stored data retrieval
4. Click the Query button to open the data
5. Switch from Table to Diagram view if desired
6. Click on the File menu to save the data as text or xls (Excel) format
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421509 Version 2.0 10/07
Battery Replacement
Replace the battery when the low battery indication symbol appears on the upper left
corner of the display. To replace the battery, remove the protective rubber holster to
access the battery compartment. Remove the two screws that secure the rear battery
compartment cover. Remove the old battery, install a new one, and replace cover.
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be performed
on an annual basis to ensure calibration integrity.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one
year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to
return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781)
890-7440 ext. 210 for authorization or visit our website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service
Department’ to request an RA number). A Return Authorization (RA) number must be issued before any product is returned
to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in
transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation
outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any
implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental
or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth
above is inclusive and no other warranty, whether written or oral, is expressed or implied.
Support line (781) 890-7440
Technical support: Extension 200; E-mail: [email protected]
Repair & Returns: Extension 210; E-mail: [email protected]
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Copyright © 2007 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
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421509 Version 2.0 10/07