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33x
Calibration Information
Backlight Test
The 334, 335, 336, and 337 Clampmeters are equipped with a display backlight. To test the backlight,
press s. The backlight will come on and the unit will beep. To turn off the backlight, press s a second
time. Refer to Figure 3.
Keypad Test
To test the keypad, turn the Meter on and push each button separately. Each button push will cause the
Meter to beep.
Preparing for the Performance Test
To avoid possible electric shock or personal injury:
•
Do not perform the following procedures unless qualified to do so. Some
procedures involve the use of high voltages.
•
Before handling the test connections and in between tests, make sure the
calibrator is in standby mode (STBY).
To prepare for the performance test:
1. Make sure that you have the required equipment, see Table 1.
2. Warm up the calibrator as required by its specifications.
3. Allow the temperature of the UUT to stabilize at room temperature ( 23 °C ± 5 °C [73 °F ± 9 °F] ).
6
V
OFF
Figure 3. Testing the Backlight
WWarning
V
OFF
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