Installation Instructions

Page 20
Testing the Frequency Function (for 61-340 / 61-342)
To verify the accuracy of the meter’s frequency function, do the following:
1. Connect the calibrator to the
and COM inputs on the meter.
Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified
accuracy of the meter.
2. Set the rotary switch to the
position.
3. Set the calibrator or function generator for the square wave voltage and frequency for steps 1 - 6 of
Table 7a.
4. Compare the reading on the meter display with the display reading shown in Table 7a.
5. If the display reading falls outside of the range shown in Table 7a, the meter does not meet
specification.
Table 7a Frequency Test:
Step Range Source Level Reading
1 100Hz 9.0Hz 3V rms 8.988 to 9.012
2 100Hz 90Hz
3V rms
89.88 to 90.12
3 1kHz 900Hz
3V rms
898.8 to 901.2
4 10kHz 9kHz
3V rms
8.988 to 9.012
5 100kHz 90kHz
3V rms
89.88 to 90.12
6 1MHz 900kHZ
3V rms
898.8 to 901.2
7 10MHz 9.00MHZ
5V rms
8.97 to 9.03
Testing the Duty Cycle Function (for 61-340 / 61-342)
To verify the accuracy of the meter’s frequency function, do the following:
1. Connect the calibrator to the
and COM inputs on the meter.
Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified
accuracy of the meter.
2. Set the rotary switch to the
position. Press the Hz/DUTY button to select the DUTY CYCLE
function
3. Set the calibrator or function generator for the square wave voltage and frequency in Table 7b.
4. Compare the reading on the meter display with the display reading shown in Table 7b.
5. If the display reading falls outside of the range shown in Table 7b, the meter does not meet
specification.
Table 7b Duty Cycle Test:
Step Range Source Level Reading
1 1kHz 1kHz 3V rms 48.3% to 51.7%
Form Number TM61340-2 Rev 3 January 2008