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Testing the Display
Press and hold the blue key, and simultaneously turn the UUT on. Compare the display with the
example in Figure 2. Check all segments for clarity and contrast.
Backlight Test
The display backlight is a toggle function controlled by the H key. Each press of
Hcauses the backlight to change states, on to off or off to on. To test the backlight:
1. Press the H key twice to verify that the toggle function is working.
2. Turn the backlight off.
Keypad Test
The keypad consists of six keys located above the rotary switch. To test the keypad:
1. Turn the rotary switch to
press of an operational key will cause the Tester to beep. No beep in response to
a key press indicates a defective keypad.
2. Reset the Tester by turning it
Disassembling and Reassembling the Tester
This section of the manual provides instructions for disassembling and reassembling the
Tester. The instructions are limited to major replaceable assemblies and do not include
component-level detail. See Figure 3 for an exploded view of the major assemblies. Also,
the emphasis is placed on disassembly. However, when appropriate, an italicized entry at
the end of each disassembly procedure provides critical hints for reassembly.
riešenia na presné meranie
Figure 2. Display Test
and momentarily press each of the six keys. Each
V
, and then to any other position.
OFF
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Disassembling and Reassembling the Tester
Insulation Testers
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