Amprobe AMB-110 Insulation-Resistance-Tester - Manual (Page 41)

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MAINTENANCE
Inserting and charging batteries for the first time
Battery cells are stored in the bottom section of the instrument casing under the battery cover (see
Fig. 30). When inserting batteries for the first time please note the following:
• Disconnect any measurement accessories or mains supply cable connected to the instrument
before opening the battery cover to avoid electric shock.
• Remove the battery cover.
• Insert the batteries correctly (see Fig. 30), otherwise the test instrument will not operate!
• To easy insert the batteries to the battery holder first insert the upper and the lower batteries
in each columns and at end the middle batteries.
• The battery cover has to be placed and fixed back.
Connect the instrument to the mains power supply for 20 hours to fully charge batteries. (Typical
charging current is 600 mA).
When you charge the batteries for the first time, it normally takes about 3 charge and discharge
cycles for the batteries to regain full capacity.
Replacing and charging batteries
The instrument is designed to be power by rechargeable battery supported by mains supply. The
LCD contains an indication of battery condition (lower left section of LCD). When the low-battery
indication appears the batteries have to be recharged, connect the instrument to the mains power
supply for 20 hours to recharge cells. The typical charging current is 600 mA.
Note
• The operator does not need to disconnect the instrument from mains supply after the full
recharging period. The instrument can be connected permanently.
Fully charged rechargeable batteries can supply the instrument for approx. 4 hours. (Continues
testing at 10kV)
If the batteries have been stored for a long time, it normally takes about 3 charge and discharge
cycles for the batteries to regain full capacity.
Battery cells are stored in the bottom section of the instrument casing under the battery cover (see
Fig. 30). In case the batteries become defective please note the following:
• Turn the power off and disconnect any measurement accessories or mains supply cable
connectedto the instrument before opening the battery cover to avoid electric shock.
• Remove the battery cover.
• All six cells have to be replaced and they have to be of the same type.
• To easy remove batteries from battery holder first remove the middle batteries in each column
and then the others (see the Fig. 30).
• Insert the batteries correctly (see Fig. 30), otherwise the test instrument will not operate and
battery may be discharged!
• To easy insert batteries to battery holder first insert the upper and the lower batteries in each
columns and at end the middle batteries.
• The battery cover has to be placed and fixed back.
• The Instrument will only work when rechargeable batteries are inside the instrument
Nominal power supply voltage is 7.2 V DC. Use six NiMH cells with size equivalent to IEC LR20
(dimensions: diameter = 33 mm, height = 58 mm). See the Fig. 30 for correct polarity of the
batteries.