8879 Series
Transmitter Controls and Indicators
RECHARGER
JACK
OUTPUT
FREQUENCY
CONTROL
BATTERIES NEED
REPLACEMENT
OR CHARGING
TRANSMITTER
ON INDICATOR
OUTPUT
SIGNAL
CONTROL
SIGNAL
OUTPUT JACK
OUTPUT
CIRCUIT
BREAKER
OUTPUT
CIRCUIT
IMPEDANCE
OUTPUT CIRCUIT BREAKER
The circuit breaker is tripped if the T
RANSMITTER is subjected to a voltage of 250V
or 1.5 amps.
TX OUTPUT (SIGNAL OUTPUT JACK)
The TX OUTPUT is the jack. The R
ED/BLACK CORD and the FLEXICOUPLER con
nects to create a circuit on the buried utility.
W
ARNING: LETHAL VOLT
AGE MAY BE PRESENT
OUTPUT SIGNAL LEVEL CONTROL
The OUTPUT SIGNAL LEVEL CONTROL adjusts the power output from the
T
RANSMITTER. The three selections include: LOW (One LED) HIGH (Two LEDS.
LOADING Indicator
The LOADING indicator flashes to indicate the output circuit impedance. When
the indicator blinks 4 times per second, it is indicating a nearly short circuit.
When the indicator blinks 1 time every 3 seconds, it is indicating a nearly
open circuit. (refer to page 6 for details)
LOW BAT Indicator
When the LOW BAT indicator is on, it is time to change the batteries in the
T
RANSMITTER. The output will cycle every 20 seconds to indicate a low battery
condition.
TX ON
The TX ON indicates the T
RANSMITTER is on.
OUTPUT FREQUENCY CONTROL
The frequency button toggles through the frequencies lighting the
LED next to the
selected frequency. The 82 kHz frequency is the higher of the three. The 82 kHz
frequency is often used to locate sharp corners in cables or pipes and is capable
of jumping disconnected shield bonds or grounds. The 815 Hz is the lower
frequency. It is less susceptible to locating errors caused by adjacent cables or
pipes. Also, by using the 815 Hz frequency, the locating range is greater. The
8 kHz is a mid-range frequency used when the 815 Hz is too weak and the
82 kHz is bleeding off to easily. The unit can transmit both 82kHz and 815Hz this
is indicated when both LEDs are lit.
3
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