UNI DM-1170A, Руководство по эксплуатации

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8. MAINTENANCE
The meter is a precise and intelligent instrument. It has been accurately calibrated in the factory before
shipment. Readjustment is recommended only if repairs have been made in a circuit affecting adjustment
accuracy or if you have a reason to believe the unit is out of adjustment.
The following instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any
servicing other than contained in the operating instructions unless you are qualified to do so.
Do not verify the circuit to avoid damaging.
NOTE:

Do not connect the voltage higher than DC1000V or AC 1000V rms.

Do not measure voltage at the Ω range.

When replacing fuse, please take away the test leads from the measuring point and power off at first.

Keep the instrument away from water, dust and shock.

Do not operate the meter in high temperature or strong magnetic place.

Do not use the abrasives or solvents to clean the meter.
Please select fuse of the same specification to replace it. The fuse must be replaced by qualified personnel.
Power fuse: 200mA/250V (located in input power socket); Fuse for measuring current: 800mA/250V (located
in the current input terminal), 20A/250V (located the main circuit).
WARNING: To avoid electric shock or electric arc burns or damage to the meter, please
follow below steps and instructions to replace fuse.
Test fuse:
1) Press the function key to Ω range
2) Connect a test lead to “V Ω Hz” terminal, use the pen tip to touch the “mA” or “20A” terminal to test the
resistance of the fuse
3) If the tested fuse resistance is below 5 Ω , it means the fuse is good.
4) If the tested result is “OL” (over load), the fuse needed to be replaced.
5) If the fuse is tested as good but the meter cannot carry any measurement, please send the meter for
repair.
Fuse replacement
Disconnect the meter from AC power source, and take off all test leads.
800mA fuse replacement
1) Press “mA” input jack by finger; take out the fuse jack after turning 90°angle anti-clockwise
2) Take off the fuse, and replace an equivalent then turn on the fuse jack.
3) After pressing the fuse into the fuse jack, turn 90°angle by an inverse hour direction.
20A fuse replacement (must be replaced by qualified personal.)
1) Screw off the four screws on the key shell by a screwdriver, take off the upper shell.
2) Take off the fuse, and replace an equivalent then turn on the fuse jack.
3) Take on the shell, screw on the four screws on the key shell by a screwdriver.
8155+ V1.0