PCB Piezotronics GK291D, Installation And Operating Manual

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PAGE 9
MANUAL NUMBER: 19175
MANUAL REVISION: B
Battery Life & Replacement
Typical battery life is 100 hours at gain of 1 or 40 hours at gain of 10 or 100 when using high quality
alkaline batteries, assuming the unit is turned off when not in use. When a BATT Test fail occurs, find
and carefully remove the Philips head screw on the back of model 480C02. The housing will easily
separate from the working portion of the unit and expose the batteries. Gently remove each of the battery
connectors to avoid damage and remove the batteries. Re-install new PP3, 9-volt batteries in same
locations, making sure all are of the same type and same manufacturer. Replace housing and hand-
tighten screw on back of unit. It is not recommended to mix type or manufacturer of batteries or damage
can occur as batteries rupture or leak. It is recommended to remove batteries from units not in frequent
use, to avoid any damage from long-term battery corrosion.
Optional Power Connections
Rechargeable Battery Use & Charging
WARNING, models 480C02 / 480E09 do not ship with rechargeable batteries and PCB external battery
chargers are suitable for use with Nickel-Cadmium (Ni-Cad) rechargeable batteries only. It should not
be used with alkaline or other non-rechargeable batteries.
Use of battery chargers, model 488A02 (110 VAC) or model F488A02
(220 VAC) should only be attempted after installation of suitable
batteries. Plug 488A02 charging connector into front panel jack and
with unit off, recharge for 14 hours. Charger supplies 10 mA constant
current to the rechargeable batteries in the unit. Batteries should not
be charged in areas near combustible materials or left unattended.
Disconnect all power if any evidence of overheating occurs.
External Power Connection
The external power connector (which mates with a #750 Switchcraft telephone plug) is intended for use
when longer battery life is desired. Insertion of the plug into the jack isolates the battery power
connection, powering the unit from only the secondary power source. A variety of battery packs were
previously available for use with this connection, one being model 073A05. They are still viable for use,
but are no longer in production from PCB.
CAUTION: Insert plug into EXT PWR prior to powering ON the external power supply.