General Technologies TD101 SmarTach + D: Gas and Diesel Tachometer with Ignition Voltage Tester - Manual (Page 12)

sions due to sparks tracking around damaged wires.
This practice will interfere with the normal use of the SmarT-
ach+. Please see the comments under SHIELDED SPARK-
PLUG WIRES (above).
Motorcycles, Ski-Doos and Jet Skis
Some of these machines may have motors which are “shoe-
horned” into a substantial frame so that frame members ef-
fectively split the radio transmissions from different plug wires
and the SmarTach+ antenna cannot receive transmissions
from all the wires simultaneously. If possible, try holding the
antenna close to a point where all the spark-plug wires are
grouped together. If this is not possible consider how many
cylinders the antenna cannot detect. Typically this will be half
the cylinders. For example, in a 4 cylinder motorcycle with
a transverse crankshaft, 2 cylinders will be to the left of the
frame and 2 cylinders to the right. When making tests while
standing on the right side of the bike it is likely that the an-
tenna will only detect the transmissions from the two cylinders
on the right. In this case, just set the SmarTach+ to the “2CYL”
setting to start reading correct RPMs.
SMARTACH+ D (Diesel)
OVERVIEW
If you purchased the model SmarTach+ D, it is very important
you read the instructions in this section.
Your SmarTach+ D can measure the speed of diesel engines
in addition to all the measurements of the regular SmarTach+.
It is recommended that you read the SmarTach+ Detailed
Instructions of this handbook first, to become familiar with the
basic method of operation.
SHORT INSTRUCTIONS
1. Clamp the sensor clamp onto a clean unpainted section of
any diesel injection pipe. Do not over tighten the thumb
screw. (see Fig. 1)
Fig. 1 Piezo Sensor Clamp Set Up
Page 20 Page 21