User's Manual

DIGITAL CONTROL INCORPORATED
DigiTrak F5 Operator’s Manual xliii
Temperature
Warning Tones
118–133° F (48–56° C)
Three double-beep sequences (beep-beep, beep-beep, beep-beep) for
every 4° C increase in temperature. Cooling is critical to avoid irreversible
damage.
Above 140° F (60° C)
Three double-beep sequences every 5 seconds on the remote display, and
every 20 seconds on the receiver.THis warning signifies dangerous drilling
conditions; irreversible damage may have already been done.
Above 176° F (80° C)
None: transmitter shuts down.
180° F (82° C)
None: FS and FC transmitter overheat indicator (temp dot) turns black (see
next section).
220° F (104° C)
None: Long-range and extended long-range transmitter overheat indicator
(temp dot) turns black (see next section).
Transmitter Overheat Indicator (Temp Dot)
Each transmitter has a temperature overheat indicator (temp dot) on the front end cap. The
temp dot has an outer yellow ring with a
1
/
8
in. (3 mm) white dot in the center. The white dot
will change color if the transmitter is exposed to excessive heat.
Front End Cap of Transmitter Showing Temp Dot and Index Slot
If the temp dot changes to silver or gray, the transmitter has been exposed to heat but not in
excess of specifications. If the temp dot is black, the transmitter has been exposed to
temperatures in excess of 220° F (104° C) for long-range and extended long-range
transmitters and 180° F (82° C) for an FS or FC transmitter and can no longer be used. The
DCI warranty is void for any transmitter that has been overheated (black dot) or had its temp
dot removed.
Avoid transmitter overheating by practicing proper drilling techniques. Abrasive soils, clogged
jets, inadequate mud flow, and poorly mixed mud all contribute significantly to the
overheating of a transmitter.
Temp dot
Index slot at
6 o’clock position
Black temp dot
voids warranty