User's Manual

Transmitter
DigiTrak
®
SE™ Operator’s Manual 37
Transmitter Housing Requirements
For maximum transmitter range and battery life, the slots in the drill housing must meet minimum length
and width requirements and be correctly positioned. DCI recommends at least three slots, each at least
1/16-inch or 0.0625 in. (1.6 mm) wide and equally spaced around the circumference of the housing. For
accuracy, slot measurements must be taken from the inside of the housing.
For the standard-range ST transmitter (15 in./38.1 cm long), the slots must be at least 8.5 in. (21.6 cm)
long and begin at least 2 in. (5.1 cm) but not more than 3 in. (7.6 cm) from the front of the transmitter, as
shown below.
Battery Compartment End Front End Cap
Slot Position
Slot Length
8.5 in. (21.6 cm)
2 in.
(5.1 cm)
ST Transmitter Housing Slot Requirements
The index slot in the front end cap of the transmitter should fit onto the anti-roll pin (key) in the housing for
proper alignment of the transmitter in the housing. When the drill head's 12 o'clock position does not
match that of the transmitter, use the receiver’s roll offset function to display appropriate roll values. See
the “Roll Offset Menu” in the Receiver section.
Temperature Updates and Overheat Indicator
The ST transmitter is equipped with an internal digital thermometer. The internal temperature of the trans-
mitter is sent to the receiver and remote display every 2 seconds. This temperature is displayed on the
bottom right of the receiver display screen next to the transmitter temperature symbol
. See the opera-
tor’s manual provided with your remote display to see how your remote graphically indicates transmitter
temperature.
NOTE: Because the digital thermometer is inside the transmitter, temperature increases due to ex-
ternal drilling conditions will take time to transfer to the transmitter. Any increase in tempera-
ture should be dealt with quickly to avoid irreversible damage.
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. Once the temperature reaches 118°F (48°C) the
thermometer icon will change to display steam and it will flash:
. At this point, the transmitter has be-
come dangerously hot and must be cooled immediately or it will be damaged.
To stop temperature increases and cool the transmitter, slow or stop drilling and/or add more drilling fluid.