User's Manual

DIGITAL CONTROL INCORPORATED
xlii DigiTrak F5 Operator’s Manual
3. Slowly roll the transmitter clockwise to its 2 o’clock position (± one-half clock position)
and allow it to remain there for 10–18 seconds.
4. Slowly roll the transmitter clockwise to its 7 o’clock position (± one-half clock
position).
5. When transmitter data disappears from the receiver, the transmitter frequency has
changed (this will take approximately 10–18 seconds).
6. Go to the transmitter selection menu on the receiver and select the new frequency,
which will then display at the top of the menu screen. Open the Locate Mode screen
to verify that transmitter data appears on the display.
Note If you must disable the roll offset function before changing frequencies,
be sure to note the transmitter’s uncompensated roll position when the
drill head is at its 12 o’clock position. After a successful frequency
change, you must rotate the drill head so the roll position of the
transmitter shows the noted value and re-enable the roll offset.
Temperature Status and Overheat Indicator
All DigiTrak transmitters are equipped with an internal digital thermometer. The temperature
is displayed on the bottom right of the receiver and remote display screens next to the
transmitter temperature symbol . Normal drilling temperatures range from 64° F (16° C) to
104° F (40° C). You should suspend drilling when temperatures exceed 95° F (35° C) to
permit cooling.
Note Because the digital thermometer is inside the transmitter, temperature
increases due to external drilling conditions will take time to transfer to
the transmitter. Any increase in temperature should be dealt with quickly
to avoid irreversible damage.
If the temperature reaches 118° F (48° C), the transmitter is becoming dangerously hot. The
thermometer icon will change to show that the transmitter is reaching a dangerous
temperature, . The transmitter must be cooled immediately or it will be damaged.
To cool the transmitter, stop drilling and retract the drill bit a few feet and/or add more drilling
fluid.
Transmitter Temperature Warning Tones
The F5 receiver and remote display emit the following audible tones to indicate increases in
the transmitter temperature:
Temperature
Warning Tones
Below 61° F (16° C)
None
61–97° F (16–36° C)
Double-beep sequence (beep-beep) for every 4° C increase in
temperature.
104–111° F (40–44° C)
Two double-beep sequences (beep-beep, beep-beep) for every 4° C
increase in temperature. Action is required to cool the transmitter.