User Guide

Page 5
PERFORMANCE VERIFICATIONS
Perform the following analysis, if the meter conforms to the limits listed in Table 1 the meter is functioning
correctly. If the meter does not conform to any of the listed limits the calibration procedure must be performed.
Performance Verification Preparation
• Turn on the calibrator, allow calibrator to warm up. Temperature stabilization should be reached after 30
minutes.
• Remove battery cover and use a calibrated meter to ensure the battery measures a minimum of 4.8V DC. If
the battery measures under 4.8V DC, replace the battery before beginning the performance test.
• To test the performance of the 61-920 you will need to construct a loop using general resistors with an
accuracy of 0.5% or better of fixed values 0.1, 10, 20 200 1000)
Construct the loop using low
resistive wire. Minimize
connectivity resistance.
• Note: Error for the general resistors are not included in the test data of Table 1
• If the display reading falls outside of the range shown in the Table 1, steps 1 - 6, the meter does not meet
specification.
• Clamp jaws in the center of the test loop.
Table 1: Resistance Performance Verification
Steps
Range Input Low Limit High Limit
1 20
00.10Ω
00.05 00.15
2 20
10.00Ω
9.80 10.20
3 200
20.00Ω
19.1 20.9
4 200
100.0Ω
95.0 105.0
5 1200
200.0Ω
185 215
6 1200
500.0Ω
440 560
• Connect the meter to a single wire loop on the calibrator and place the clamp around the center of the wire.
• Apply the current listed in Table 2, steps 1 - 3.
• If the display reading falls outside of the range shown in the Table 2, steps 1 - 4, the meter does not meet
specification.
Table 2: mA, A Performance Verification
Steps
Range Input Low Limit High Limit
1 100mA 100mA @ 60Hz 97.3 102.7
2 1000mA 1000mA @ 60Hz 980 1020
3 10A 10.0A @ 60Hz 9.80 10.20
4 30A 30.0A @ 60HA 29.4 30.60
Form number TM61920 Rev 4 July 2008