Product Manual
94
TW-82 TRANSMITTER
TW-82 Transmitter
The Transmitter has two controls: & .
The Button has a dual function:
1. When the Transmitter is powered on, switches
the device between normal (1/4 watt) and high (1.0 watt)
output.
2. With the Transmitter powered off:
A. Press-and-hold to program the
Auto
Power-Down
feature.
Successive presses of will show a flashing
battery indicator, followed by a blank screen or the
illuminated battery indicator.
• An illuminated battery indicator means that
Auto Power-Down is activated.
• A blank screen means that Auto Power-Down
is deactivated.
B. After you release , the transmitter
power will turn on.
With the Auto Power-Down feature activated, the
Transmitter will automatically turn off 60 minutes after
the last key-pad press by the user. This is a battery saving
feature. The Transmitter will warn of power-down as
described on the following page.
5. Current Measure:
mA (miliAmperes) of current
flowing on the conductor.
Use Current Measure as
an aid for distinguishing
utilities in close proximity.
The Current Measure will
generally be the highest on
the utility you are connected
directly to, regardless of the utility’s depth.
6. Depth
Depth reading is
only accurate if the
electromagnetic field is
perfectly round.
The electromagnetic field
must have enough energy
for the device to accurately
calculate the depth. The
weaker the signal strength,
the less reliable the depth indicator. For this reason, depth
readings for inductively located utilities will tend to be less
accurate than conductively located ones.
The depth reading is the distance between the tip of Receiver
blade and the center of the electromagnetic field. The center of the
electromagnetic field is generally the center of the utility. The only
100% reliable method for determining depth is to hand-excavate.
AUTO POWER-DOWN, RECEIVER
When 90 minutes have passed without the operator pressing the
control button, the Receiver will automatically power down.
• Lower left of the display will indicate “OFF”.
• Lower right of the display will count down from 10 to 0.
• The Transmitter will then turn off.
To stop Auto Power-Down, press the button once.
current
depth
current
depth
TW-82 RECEIVER