Extech Instruments Corporation
EICMEX505-CP
January 2008
Revision: Initial Release
JTM-97a CALIBRATION PROCEDURE
Revision Log
Revision
Number
Date
Approved
Pages
Affected
Description of Revision
Initial
January 2008
All
Initial Release
Written By:
_____________________________
Dolores Murphy
Approved By:
_____________________________
Robert Godzwon
Date Approved:
______________________
Revision #:
EX505 Calibration Procedure
Initial
Page #:
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Procedure Number: EICMEX505-CP
Table of Contents
REVISION LOG …………………………………………………………......................... 2
1.0. INTRODUCTION……………………………………………………………….......
1.1. Purpose……………………………………………………………………...
1.2. Policy……………………………………………………………………….
1.3. Scope / Field of Application………………………………………………..
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EX505 Calibration Procedure
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1.4. Document Security…………………………………………………............. 4
1.5. Document References………………………………………………............ 4
1.6. Special Terms / Definitions…………………………………………........... 4
2.0. REQUIRED EQUIPMENT………………………………………………………….
4
3.0. EX505 ACCURACY TEST…………….…………………………………………...
4
4.0. EX505 CALIBRATION ADJUSTMENTS…………...…………….………………. 5
4.1.
mVDC Adjustment…………………………………………………………
5
4.2. VAC Adjustment…………………………………………………………
5
4.4. Capacitance Adjustment……………………………………………………
5
FIGURE: 1………………………………………………………….......................
6
APPENDIX: A “Checking Procedure……………………………………………….
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1.0. INTRODUCTION
1.1. Purpose
The purpose of this procedure is to provide detailed instructions on how to test and/or adjust
Extech Instruments Model JTM-97a.
1.2. Policy
This procedure will be used as a guideline for instructions needed to properly calibrate
Extech Instruments Model JTM-97a.
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Revision #:
EX505 Calibration Procedure
Initial
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4 of 8
Procedure Number: EICMEX505-CP
1.3. Scope / Field of Application
This procedure will be used by Extech Instruments Calibration Laboratory for detailed
instructions on how to test and/or adjust Extech Instruments Model JTM-97a.
1.4. Document Security
This document is considered to be proprietary. Therefore, this document may not be
reproduced or transmitted in any form for use outside of Extech Instruments without the
consent of Extech Instruments Corporation.
1.5. Document References
• Model JTM-97a “True RMS Industrial Multimeter” Checking Procedure.
• JTM-97a Data Sheet (EICDS- EX505).
1.6. Special Terms / Definitions
• National Institute of Standards and Technology (NIST) – Is the internationally
recognized body in which all calibrations are traceable through.
2.0. REQUIRED EQUIPMENT
The following equipment will be needed to properly calibrate the instrument.
•
•
•
(1) Calibrated Wavetek Universal Calibrator (Model: 9100) or equivalent.
(1) Premium Grade Type K Thermocouple wire.
(2) Banana to Banana test leads.
3.0. EX505 ACCURACY TEST
3.1. Install one (1) 9VDC battery into the instrument.
3.2. Connect the banana to banana test leads to the output socket of the EX505.
3.3. Connect the other end of the banana to banana test leads to the input of the Wavetek 9100.
3.4. Power on and set the EX505 to VDC.
3.5. Set the Wavetek 9100 to DC Voltage.
3.6. Input 350.0 mVDC.
3.7. Record the EX505 reading on the proper data sheet. (EICDS- EX505)
3.8. For the remaining test points refer to the “Model EX505 – Checking Procedure” listed in
Appendix A.
NOTE: For instruments coming in under a RMA number, record all of the readings on the
proper data sheet, even if they are not within the specified tolerance. If the instrument is new and
out of the specified tolerances, proceed to Section: 4. There is no need to record “Out of
Tolerance” conditions for new instruments.
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3.10. If any of the readings were outside of the specified tolerances, proceed to Section: 4.
3.11. If all of the readings were within the specified tolerances, the instrument is now complete.
4. EX505 CALIBRATION ADJUSTMENTS
NOTE: To perform the following adjustments, the same equipment is required as indicated on
Section: 2.0.
4.1.0 Temperature Adjustment
4.1.1 Set the EX505 to temperature mode.
4.1.2 Input 25.0ºC to the input sockets of the EX505.
NOTE: The display should indicate “25.0ºC.”
4.1.3 Adjust VR4 until you have a reading of 25.0ºC.
4.1.4 Input 750.0ºC to the UUT’s input sockets.
4.1.5 The display should read 750ºC.
4.1.6 Adjust VR5 until the display reads 750ºC.
4.1.7 Switch the EX505 to ºF.
4.1.8 Input 77ºF.
4.1.9 The meter should display 77ºF.
4.1.10 Adjust VR6 until the display shows 77ºF.
NOTE: After all adjustments have been made, proceed to Section: 3 to retest the instrument. Record the
data from Section: 3 as the “Final Reading” of the instrument. If the instrument is new, record the data
as the “Calibration Data”.
Figure: 1
Calibration Potentiometers
NOTE: To access the calibration potentiometers, remove the screw located on the back of the unit. Then carefully
remove the back cover.
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Procedure Number: EICMEX505-CP
Appendix: A
CHECKING PROCEDURE
Page 1 of 2
Model# EX505
True RMS Industrial Multimeter
Extech Instruments Corporation
Revision #:
Initial
EX505 Calibration Procedure
Page #:
7 of 8
Procedure Number: EICMEX505-CP
1. VISUAL - Check for cosmetic problems, scratches, wrong labels, loose labels, etc.
2. Insert 1 each "9V" battery and observe correct polarity.
3. Power "ON" and check for any missing display segments.
4. Test the following functions:
FUNCTION
DC Volts
DC Volts
DC Volts
DC Volts
DC Volts
RANGE
400.0 mV
4.000 V
40.00 V
400.0 V
1000.0 V
INPUT
350.0 mV
3.500 V
35.00 V
350.0 V
950.0 V
TOLERANCE
+/- (0.5%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.5%rdg+2d)
READING
348.0 – 352.0
3.456 – 3.544
34.56 – 35.44
345.6 – 354.4
934 – 966
AC Volts
AC Volts
AC Volts
AC Volts
AC Volts
400.0 mV
4.000 V
40.00 V
400.0 V
1000.0 V
350.0 mV
3.500 V
35.00 V
350.0 V
950.0 V
+/- (2.0%rdg+10d)
+/- (2.0%rdg+5d)
+/- (2.0%rdg+5d)
+/- (2.0%rdg+5d)
+/- (2.5%rdg+5d)
342.0 – 358.0 manually select mV
3.425 – 3.575
auto range
34.25 – 35.75
342.5 – 357.5
921 – 979
DC Amps
DC Amps
DC Amps
DC Amps
DC Amps
400.0 uA
4000 uA
40.00 mA
400.0 mA
10.00 A
350.0 uA
3.500 mA
35.00 mA
350.0 mA
7.50 A
+/- (1.0%rdg+3d)
+/- (1.5%rdg+3d)
+/- (1.5%rdg+3d)
+/- (1.5%rdg+3d)
+/- (2.5%rdg+5d)
346.2 – 353.8
3.444 – 3.556
34.44 – 35.56
344.4 – 355.6
7.26 – 7.74
AC Amps
AC Amps
AC Amps
AC Amps
AC Amps
400.0 uA
4000 uA
40.00 mA
400.0 mA
10.00 A
350.0 uA
3.500 mA
35.00 mA
350.0 mA
7.50 A
+/- (2.5%rdg+10d)
+/- (2.5%rdg+5d)
+/- (2.5%rdg+5d)
+/- (2.5%rdg+5d)
+/- (3.0%rdg+7d)
340.2 – 359.8
3407 – 3593
34.07 – 35.93
340.7 – 359.3
7.20 – 7.80
Resistance
Resistance
Resistance
Resistance
Resistance
Resistance
400.0 Ω
4.000 K Ω
40.00 K Ω
400.0 K Ω
4.000 M Ω
40.00 M Ω
350.0
3.500
35.00
350.0
3.500
35.00
+/- (1.2%rdg+4d)
+/- (1.0%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (2.0%rdg+3d)
345.4 – 354.6
3.463 – 3.537
34.56 – 35.44
345.6 – 354.4
3.456 – 3.544
34.27 – 35.73
Ω
KΩ
KΩ
KΩ
MΩ
MΩ
NOTES
CHECKING PROCEDURE
Page 2 of 2
Model# EX505
True RMS Industrial Multimeter
FUNCTION
RANGE
INPUT
TOLERANCE
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READING
NOTES
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EX505 Calibration Procedure
Initial
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Procedure Number: EICMEX505-CP
Capacitance
Capacitance
Capacitance
Capacitance
Capacitance
40.00 nF
400.0 nF
4.000 uF
40.00 uF
100.0 uF
35.00 nF
350.0 nF
3.500 uF
35.00 uF
95.0 uF
+/- (5.0%rdg+7d)
+/- (3.0%rdg+5d)
+/- (3.0%rdg+5d)
+/- (3.0%rdg+5d)
+/- (5.0%rdg+5d)
33.18 – 36.82
339.0 – 361.0
3.390 – 3.610
33.90 – 36.10
89.7 – 100.3
Frequency
Frequency
Frequency
Frequency
Frequency
Frequency
Frequency
9.999 Hz
99.99 Hz
999.9 Hz
9.999 KHz
99.99 KHz
999.9 KHz
9.999 MHz
9.500 Hz
95.00 Hz
950.0 Hz
9.500 KHz
95.00 KHz
950.0 KHz
9.500 MHz
+/- (1.5%rdg+5d)
+/- (1.5%rdg+5d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.5%rdg+4d)
9.352 – 9.648
93.52 – 96.48
938.4 – 961.6
9.384 – 9.616
93.84 – 96.16
938.4 – 961.6
9.353 – 9.647
Duty Cycle
0.1 to 99.9%
0.1 to 99.9%
0.1 to 99.9%
0.1 to 99.9%
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
+/- (1.2%rdg+2d)
9.7 – 10.3
24.5 – 25.5
49.2 – 50.8
73.9 – 76.1
Temperature
-4 to 1382 °F
-4 to 1382 °F
-4 to 1382 °F
-4 to 1382 °F
Temperature
-20 to 750 °C
-20 to 750 °C
-20 to 750 °C
-20 to 750 °C
10.0%
25.0%
50.0%
75.0%
0.0
+/- (3.0%rdg+9degrees)
-9.0 to 9.0
32.0
+/- (3.0%rdg+9degrees)
22.0 to 42.0
212.0
+/- (3.0%rdg+9degrees) 196.6 to 227.4
1350.0
+/- (3.0%rdg+9degrees) 1300 to 1400
-15.0
0.0
100.0
700.0
+/- (3.0%rdg+5degrees)
-20.5 to -9.5
+/- (3.0%rdg+5degrees)
-5.0 to 5.0
+/- (3.0%rdg+5degrees) 92.0 to 108.0
+/- (3.0%rdg+5degrees) 674.0 to 726.0
5. Test the "CONTINUITY" function. The unit should "beep" continuously at less than 100 Ω.
6. Test the "DIODE" function with a known good diode and note a typical reading of 0.400 to 0.700V.
7. Test the “HOLD” function. It should freeze the reading in the display.
8. Test the “RELATIVE” function. Refer to manual.
9. Test that the "AUTO POWER OFF" function turns the meter OFF in approximately 30 minutes.
10. Turn the meter to the "OFF” position.
11. If all of the above tests are within acceptable limits re-package the meter and transfer it to warehouse status.
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