Note

If you change to another probe with a different full scale measurement range, the alarm threshold will also change. A setting that is often used with shaped frequency response probes is 50% of Standard. To set the alarm for one of the 8722 series probes, which have full scale measurement ranges of 300% of standard, calculate the threshold setting by dividing the desired alarm level by the full scale value. In this case

50/300 = 16.66%. Set the alarm threshold to 17% and the alarm threshold will be 51% of Standard when using a

8722 series probe.

4.The left side of the display gives the status of the fixed alarm. It indicates whether the fixed alarm is either on or off and the current alarm threshold setting in terms of percent of full scale of the probe in use (1% to 99%).

5.The right side of the display indicates whether the variable tone alarm is either on or off.

6.The bottom line of the display indicates which function key (F1-F4) is used to turn the two alarms on or off.

Fixed Alarm

1.Use F1 (ON) or F2 (OFF) to change the status of the fixed alarm.

2.Use the numeric key pad to enter a two-digit alarm threshold number. This number is equal to the percent of full scale of the measurement range of the probe in use. For example, to set the meter to sound its alarm at 5 mW/cm2 when using a Model 8721D probe, which has a full scale measurement range of 20 mW/cm2, set the alarm threshold to 25%.

3.If you want to turn the variable tone alarm on or off do that next. See Variable Tone Alarm on the following page.

4.When you are satisfied with all the alarm settings, press ENTER and the meter will return to the measurement screen.

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Operating the Meter