RD4000 Locating System User Manual
Page 49
If the receiver bargraph response is the same or increases it indicates that the receiver is picking up airborne
signals.
In either case reduce the transmitter power and reduce the receiver sensitivity. It may also be necessary to
move the receiver as much as 25 or 30 paces from the transmitter.
Do not place the transmitter on a manhole cover as this prevents the signal from reaching the line.
RD4000T3 AND RD4000T3F OPERATION
Switching the transmitter on/off
To switch the transmitter on, press and release the on/off key.
To switch the transmitter off, press the on/off key until the LEDs go off.
Holding down the on/off key for 2-3 seconds while switching on the transmitter reduces the transmitter volume
level. (Depending on the model, the volume is either reduced or set to zero).
Selecting a frequency (direct connection)
The RD4000T3 transmitter is supplied with three frequencies and induction mode. In addition, the RD4000T3F
has a FaultFind frequency
The frequencies are those chosen by the customer at the time of transmitter purchase. If the values of the
frequencies require changing when the unit is in-service, the unit must be returned to Radiodetection for re-
configuration.
•
To select a frequency, ensure that an accessory is plugged into the transmitter. The induction mode LED
will extinguish
•
Press the frequency key to select the next available frequency. The selected frequency LED will illuminate.
Further key presses cycle through all available frequencies.
Selecting induction
Switch the transmitter on. Induction mode is automatically selected if no accessory is plugged in. The induction
mode LED illuminates.
Note: You can switch between induction and direct connection modes whilst the transmitter is operating by
removing or plugging in an accessory.
Selecting a power output level/induction level
•
Select the required frequency
•
Press the up arrow key to select a higher output level and press the down arrow to select a lower output
level. The LEDs will illuminate to show that the transmitter is supplying the requested signal current. A
flashing LED indicates that the transmitter cannot supply the requested output, but is supplying as much
signal current as possible. Restricted signal current may be because the connected line has high resistance
on it. Improving the ground connection may increase the output.
