User's Manual

USER'S MANUAL
MODEL PT-90 TELEMETRY TRANSMITTER
INTRODUCTION
The Communications Specialists Model PT-90 is to be used as a telemetry transmitter to locate
livestock and other animals by doppler positioning or triangulation. It also transmits back data relative
to activity, mortality, etc. by changing pulse rate. It is FCC Certified and must be used with a valid
FCC license, issued for telemetry uses, under Part 90.259 of the Rules. It is preprogrammed at the
factory to operate in the 217-220Mhz band. Power output is 95mW. The PT-90 is waterproof and
includes a changeable, screw-on, antenna. It uses a widely available CR123A Lithium battery or a LIR
17335 rechargeable Lithium battery. The transmitter can be disabled to preserve battery life by sliding
the supplied magnet into the slot between to top of the transmitter and the collar.
BATTERY INSTALLATION
First remove the magnet, if installed. Then slide the supplied CR123A Lithium battery into the
collar battery compartment + (positive) end in first. Screw on the battery compartment cap with a
screwdriver or coin. A small amount of Vaseline on the battery compartment cap "O" ring will allow
easy cap removal and keep the battery compartment watertight. Dispose of any used batteries properly.
If the battery is inserted backwards, the transmitter will not function but it will not be damaged.
Simply reverse it to start the transmitter working. If you are using the LIR17335 rechargeable Lithium
Ion battery and quick charger, please note that if a discharged battery is being charged, the LED
indicator light on the charger will be orange. When the battery is charged, it will change to green. A
battery can be left in the charger indefinitely without being damaged. The rechargeable battery can be
recharged over 500 times before needing replacement. Charge time is less than 3 hours.

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