Digatron DT-31RI Installation Instructions

DT-30RI SERIES INSTRUMENT INSTALLATION INSTRUCTIONS
IMPORTANT
Thoroughly read all of the installation instructions before
attempting to install your instrument. Failure to do so could
result in damage to the instrument or other problems arising.
These instructions cover the installation of all sensors in
the "30RI" series. You need only those that apply to your par-
ticular Model.
If you have any questions about the installation or prob-
lems with the instrument, call the DIGATRON Technical Serv-
ice Department at (509) 467-3128.
BATTERY INSTALLATION
Your instrument is supplied with a fresh set of batteries in-
stalled. When it is time to replace the batteries, remove the
battery cover from the instrument and remove the old batteries.
Install 4 new AA batteries in the battery holder paying atten-
tion to the polarity markings inside the battery holder.
Before reattaching the battery cover, check the battery
pressure pad on the inside of the battery cover. This pad must
apply pressure to the batteries when the cover is in place. E r-
ratic instrument readings may be experienced if the batteries
move around excessively during use.
For longest battery life, we recommend alkaline batteries.
INSTRUMENT INSTALLATION
Before you begin cutting and drilling your dash panel, two
conditions should be met whenever possible.
1: A distance of at least 6" must be maintained between the
instrument and any ignition components (plug wires, spark
plugs, ignition coil, distributor, or magneto) to prevent electri-
cal interference from affecting the operation of the instrument.
2: Access to the rear of the instrument should be provided
to allow for connecting and disconnecting the sensors. Easy
removal of the instrument from the dash panel is also needed
for battery changes.
For dash panel mounting the instrument, a correctly sized
rectangular opening in the dash panel is required. ( A template
is provided with each instrument for your convenience.)
Below is a chart showing the size of the opening required
for each model.
MODEL
DT-31
DT-32
DT-33
DT-34
DT-35
REAR MOUNT
3.500" x 4.500"
3.500" x 4.050"
3.500" x 6.600"
3.500" x 6.600"
3.500" x 9.000 "
GROUNDING
If the instrument is not mounted in a well-grounded alumi-
num dash panel, run a grounding wire from the instrument's
mounting bracket to a near by ground point. Keep this wire as
short as possible.
The engine of the vehicle should also be grounded to the
chassis by a wide, braided ground strap (1/2" or wider and as
short as practical) for best instrument operating results. When
establishing a new ground connection, it is important to make
these connections to clean bare metal. Paint, anodizing, rust
and other contaminants will impede the shorting out of electri-
cal interference which may affect the operation of your instru-
ment. Wire lengths must also be kept as short as possible.
WIRE ROUTING NOTES
The following instructions apply to the sensors that run
from the engine compartment to the instrument. These sensors
should always be routed as far away as possible from the igni-
tion system components. (plug wires, spark plugs, ignition
coils, distributor or magneto). Leads too close to these comp o-
nents may pick up radiated electrical interference and cause
erratic instrument readings and operation. A distance of at
least 6" from these components is desirable in all installations
Route all the sensor wires from the engine into the driver's
compartment through a protected opening in the firewall. The
opening must provide protection against the sharp metal edges
of the hole. Large rubber grommets available from most auto
supply or hardware stores work best.
Do not coil sensor wires together. Keep the individual
sensor wires separated as much as possible. Separating the
wires will help to eliminate the induction of electrical interfer-
ence from one sensor into the other sensor leads. Induced
interference will cause erratic instrument readings.
Exhaust Sensor leads must not be routed together with any
Tach Sensor leads. Provide a totally separate routing path for
the Tach Sensor lead.
DO NOT OPERATE the instrument with any disconnected
or open inputs. Unused instrument inputs must be terminated
at the back of the instrument with a shorting plug available
from DIGATRON. Inputs that are left open can cause erratic
display readings and in some instances, instrument damage
can result.
DASH INDICATOR WARNING LIGHT
P/N DI-118BN Mount the Dash Indicator light directly
in the driver's line of sight in the dash panel. The indicator
mounts in a 1/2" diameter hole. It is important that the driver
be able to see this indicator while driving without looking
away from the track.