Maintenance - Projekt Elektronik FM 302 Operating Manual

8. Maintenance

8.1 Visual Inspection
Be sure before any measurement that the probe itself, the probe cable, the
probe housing, the Teslameter housing, the power adapter and the power
cord are undamaged and in a proper safety condition.
Check that the housing shows no cracks.
Check the cables for breakage or chafing.
Check the probe for cracks or similar damage.
Check the power adapter for cracks.
8.2 Checking Battery
To check the battery of the Teslameter FM 302 open the battery
compartment on the rear (remove and lift the lid from the instrument). The
battery can be removed now.
Check the battery for leaked fluid at regular three-months intervals, but in
any case after extended inactivity.
If the battery is low (see section 6.3.1.6 for FM 302), replace it by a fresh 9 V
E-block, e.g. Panasonic type 6LR61.
Pay attention to polarity when inserting a new battery!
8.3 Maintaining Accumulators
If the instrument is run with a 9 V block accumulator, it must be checked for
leaked fluid at regular monthly intervals, but after extended inactivity at any
rate.
Accumulators have a self-discharge. That means that the accumulator
looses charge even if the device is switched off.
To check the accumulator of the Teslameter FM 302 open the battery
compartment on the rear (remove and lift the lid from the instrument). The
accumulator can be removed now.
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH Page 114