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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. |
2.Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified accuracy of the meter.
3.Set the rotary switch to 
.
4.Set the calibrator or function generator for the square wave voltage and frequency for steps
5.Compare the reading on the meter display with the display reading shown in Table 7a.
6.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 |
|
|
|
|
1 | 100Hz | 9.0Hz | 3V rms |
|
|
|
|
2 | 100Hz | 90Hz | 3V rms |
|
|
|
|
3 | 1kHz | 900Hz | 3V rms |
|
|
|
|
4 | 10kHz | 9kHz | 3V rms |
|
|
|
|
5 | 100kHz | 90kHz | 3V rms |
|
|
|
|
6 | 1MHz | 900kHZ | 3V rms |
|
|
|
|
Reading
8.987 to 9.013
89.87to 90.13
898.7to 901.3
8.987 to 9.013
89.87to 90.13 898.7to 901.3
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. |
2.Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified accuracy of the meter.
3.Set the rotary switch to 
.
a. Press the Hz/DUTY button to select the DUTY CYCLE function
4.Set the calibrator or function generator for the square wave voltage and frequency as Table 7b.
5.Compare the reading on the meter display with the display reading shown in Table 7b.
6.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 |
|
|
|
|
1 | 1kHz | 1kHz | 3V rms |
|
|
|
|
Reading
48.3% to 51.7%
Form Number | Rev 2 November 2007 |
