Avtron Model T477W Bonding Meter
with B14703 Battery Pack Replacement Instructions
Part Number T477WC15292
Battery Charging
Subject to the EAR, ECCN [9E610.a].
This information is subject to the export control laws of the United States, specifically including the Export Administration Regulations (EAR),
15 C.F.R. Part 730 et. seq. Transfer, retransfer, or disclosure of this data by any means to a non-U.S. person (individual or company), whether in the United States or abroad, without any
required export license or other approval from the U.S. Government is prohibited, including without limitation any diversion to a military end user or use in a military end use application.
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BATTERY CHARGING
Batteries located within the T477W Bonding Meter are charged from external power supply B15693. Connections from the power
supply to the T477W are made through the front panel connector J1 and prevent the use of the Bonding Meter during charging. This
procedure is necessary because the power supply is not rated for use in hazardous locations.
The battery charger is a transformer isolated power supply which is designed to accommodate a wide range of input power. Two
basic ranges of input voltage are available: 115 or 230 volts, 50 or 60 Hz. A voltage range switch is located on the back of the power
supply and must be set to the appropriate range before use. Failure to position the switch to the appropriate range may damage the
power supply.
It is recommended that power supplies operated from input power voltage between 100 and 125 volts have the voltage selector
positioned to 115 volts and those operated from input power voltage between 200 and 250 volts have the voltage selector positioned to
230 volts.
The battery charger is designed to provide sufficient power to recharge T477W batteries overnight (14-16 hours). When the power
supply is used on voltage and frequency other than 115 volts, 60 Hz, charging time will vary. Power supply input voltage smaller than
115 volts (115 volt range) or 230 volts (230 volt range) will require a longer charging time. If the input voltage is greater than
115 volts (115 volt range) or 230 volts (230 volt range), a shorter charging time is required.
The power supply has an adapter plug to convert the standard type plug to a European (round pin) plug.
The power supply connector is provided with a jumper wire used to short the meter voltage sensing input. If the meter is turned on (2
milliohm range) during charge, the meter display should be .000 + or – 2 digits.
NOTE
The power supply design was changed during T477W production from a single voltage 120 volt,
60 Hz, power supply, B15422, to the more flexible B15693 type, which is a voltage selectable
120/240 volt, 50/60 Hz design. Early production T477W Bonding Meters purchased for use in the
U.S.A. were supplied with B15422.
