TQC LD0800 - 5.4 Trouble Shooting; System reset; 7 REPLACING BATTERIES; 8 MAINTENANCE

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5.4 Trouble Shooting
If the instrument does not response or can’t be turned on, you can remove the batteries, reinstall
them a few minutes later and try again. If the problem remains, please contact your supplier for
help.
The following errors should be solved by a system reset:
-Illogical readings
-Several of the keys don’t work
System reset:
1. Turn o the instrument.
2. Press and hold “ZERO Key” and then turn on the instrument.
3. Release the “ZERO Key” until a dialog box of the system reset is shown on the LCD.
4. Press “Left Key” to conrm system reset. The instrument will restart automatically.
6 CALIBRATIONS
We recommend annual calibration. For calibration, send the instrument, together with a RMA
form* to TQC, Molenbaan 19, 2908 LL Capelle aan den IJssel, NL.
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7 REPLACING BATTERIES
Place the instrument upside down on a suitable surface, remove the screws from the battery
compartment with a cross tip screwdriver, raise the lid of the compartment, remove battery,
insert new battery according to the
positive and negative poles and close the lid and fasten with screws.
8 MAINTENANCE
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means such as a wire brush or abrasive paper. This may cause, just like the use of aggressive
cleaning agents, permanent damage.
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