Form Number TM61312-4
Rev 2 Aug 2007
Page 19
Testing the Frequency Function (for 61-312 / 61-314)
To verify the accuracy of the meter’s frequency function, do the following:
1. Connect the calibrator to the
V
Ω
Hz
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
Hz
.
3. Set the calibrator or function generator for the square wave voltage and frequency
for steps 1 through 6 of Table 7.
4. Compare the reading on the meter display with the display reading shown in Table 7.
5. If the display reading falls outside of the range shown in Table 7, the meter does not
meet specification.
Table 7 Frequency Test:
Step Range
Source
Level
Reading
1
10Hz
9.0Hz
3V rms
8.969 to 9.031
2 100Hz 90Hz 3V rms
89.69 to 90.31
3 1kHz 900Hz 3V rms
896.9 to 903.1
4 10kHz 9kHz
3V rms
8.969 to 9.031
5 100kHz 90kHz 3V rms
89.69 to 90.31
6 1MHz 900kHZ 3V rms
896.9 to 903.1