User Manual

If necessary, turn to the reverse side of this card
to calculate Signal Frequency and Gate Time.
SPD-100 and SPD-100L
Signal-Powered Tachometer
Calibration Instructions
The SPD-100 and SPD-100L tachometers are normally factory-
calibrated to the customer-specified number of sensing teeth or
discontinuities, sensing speed, and desired numerical display.
To calibrate an SPD-100 or SPD-100L
1. Remove the sealing plug on the back of the housing.
2. Apply the calculated signal frequency to terminals 1 and 2.
A Dynalco F-16 or F-15 signal generator is ideal.
3. Select the appropriate gate time range on the 4-position
switch.
See label on back of SPD-100 or SPD-100L; or Item 3,
reverse side of card.
4. Adjust the vernier potentiometer for the desired display.
See below .
Shown with sealing plug removed
4-position switch
Vernier potentiometer
[clockwise to increase display reading;
counterclockwise to decrease]
© 2002 Dynalco Controls 145F-12040, Rev. 0
(
For example: 60/113 teeth = 0.53 sec. gate time)
QUICK
GATE TIME
CALCULATION
}
60
Number of
Teeth
Assumes the pickup is “seeing” the
gear of interest directly, not through
a step up or step down ratio .
{
See label on back of SPD-108, SPD-108L for additional information
Example: If 3390 Hz = 1800 RPM, then gate time is 0.53 seconds.
1. Apply 3390 Hz to terminals 1 and 2 on tachometer (no polarity).
2. Turn the gate time range switch to (either) position number 1 to
select gate time range of 0.26–0.72 seconds.
3. Adjust the vernier potentiometer to obtain a display of 1800.