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4. MAINTENANCE
4.1 Battery Replacement (FD650/R)
To avoid shock or injury, remove the FD650/R from the vicinity of
any external circuits before proceeding.
The battery compartment is underneath the unit.
To gain access, undo the screw securing the compartment cover,
then slightly lift the screw end of the cover, slide forward and remove
the cover.
Fit a new 9V PP3 battery (IEC 6LR61, NEDA 1604A).
Replace the battery cover and screw.
4.2 Cleaning
To reduce the risk of surface leakage, this instrument must be
kept in a clean condition.
Prior to cleaning, ensure that the instrument is disconnected from
any voltage source.
If contamination is found, clean with a damp soft cloth and if
necessary a mild detergent or alcohol. Do not use abrasives,
abrasive solvents, or detergents which can cause damage to the
unit. If a mild detergent is used, the unit should subsequently be
thoroughly cleaned with a water dampened soft cloth. After cleaning,
dry and allow to remain in a dry environment for 2 hours before use.
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3.2 Low Battery Indication
If the green battery LED on the receiver flashes, the battery needs
replacing (See section 4.1 Battery Replacement).
3.3 Auto Power Off
The receiver will automatically power off after approximately 5
minutes if a valid signal is not present.
The power down mode can only be reset by switching the unit OFF
and then on again.
The power down function can be deactivated by holding down the
press button switch while switching the FD650/R on.
3.4 Set/Prove Push-button
The push-button is used to set the following:
Deactivation of auto power off function.
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When the FD650/R is set to the FIND function:
Automatic threshold mode - hold down for 2 seconds;
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A utomatic mode bar graph centring - momentarily press to set
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the bar graph indication to the centre of the scale;
M anual mode threshold - momentarily press to set a new
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threshold in the presence of a signal;
T hreshold sensitivity reset - with the receiver out of signal range,
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momentarily press to set the sensitivity threshold to the power-
up default level.
When the FD650/R is set to the ACV function:
Activation of the test signal.
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3.5 Buzzer
An internal buzzer is used to indicate a signal has been detected.
In the fuse finder function the buzzer will continue to sound even if
the LED's are not illuminated, provided that a signal is present.
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