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Performance Tests
The following performance tests verify the complete operability of the meter and checks the accuracy of
each meter function against the meter’s specifications.
Accuracy specifications are valid for a period of one year after calibration, when measured at an operating
temperature of 18°C to 28°C and at a maximum of 80% relative humidity.
To verify the accuracy of each function do the following:
1. Connect the calibrator to the proper input terminals for the function listed in each table.
2. Turn the rotary switch to the function being tested and input the source to the meter
3. For each input, compare the readings on the meter display to the display readings
in each table.
5. If the display reading falls outside of the range shown in the tables, the meter does
not meet specification.
DC Voltage Test: Model 61-480
Range Source Reading
300mV 290mV 289.2 to 290.8
-300mV -290mV -289.2 to -290.8
3V 2.900V 2.888 to 2.912
30V 29.00V 28.92 to 29.08
300V 290.0V 289.2 to 290.8
1000V 900V 897 to 903
DC Voltage Test: Model 61-481 and 61-482
Range Source Reading
400mV 390mV 388.6 to 391.4
-400mV -390mV -388.6 to -391.4
4V 3.9V 3.884 to 3.916
40V 39V 38.90 to 39.10
400V 390V 389.0 to 391.0
1000V 900V 897 to 903
*Press the blue button on the Meter to toggle to ACV Function
AC Voltage Test: Model 61-480
Range Source Frequency Reading
3V 2.900V 50Hz 2.858 to 2.942
3V 2.900V 500Hz 2.858 to 2.942
30V 29.00V 50Hz 28.58 to 29.42
30V 29.00V 1KHz 28.58 to 29.42
300V 290.0V 50Hz 285.8 to 294.2
300V 290.0V 1KHz 285.8 to 294.2
750V 700V 50Hz 686 to 714
750V 700V 1KHz 686 to 714
Form number TM61480-1-2 Rev 5 July 2002
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