IDEAL INDUSTRIES technical manual Testing the Frequency Function for 61-340

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.

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 1-6 of Table 7a.

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 TM61340-2 Rev 2 November 2007