Operating voltage:
10.8 – 32 Volts
Operating current:
< 100 mA
(< 600 mA with light)
Operating temperature:
– 4° F to 158° F
(-20° C to 70° C)
Protection:
IP65 (Front)
Ozone and UV
resistant housing
Dimensions —
Depth:
3.6" (91 mm)
Diameter:
3
¹⁄₈
" (80 mm)
3
³⁄₈
" (85 mm)
4" (100 mm)
Illumination:
Backlit / Frontlit
dial and display
Calibration range:
0.5 to 200 pulses
per revolution
TECHNICAL DATA
Siemens V D O . http://sso-usa.siemensvdo.com/ . Phone: 1-800-265-1818
VDO North America warrants all merchandise against defects in factory workman-
ship and materials for a period of 24 months after purchase. This warranty applies
to the first retail purchaser and covers only those products exposed to normal use
or service. Provisions of this warranty shall not apply to a VDO product used for a
purpose for which it is not designed, or which has been altered in any way that
would be detrimental to the performance or life of the product, or misapplication,
misuse, negligence or accident. On any part or product found to be defective after
examination by VDO North America, VDO North America will only repair or replace
the merchandise through the original selling dealer or on a direct basis. VDO North
America assumes no responsibility for diagnosis, removal and/or installation labor,
loss of vehicle use, loss of time, inconvenience or any other consequential ex-
penses. The warranties herin are in lieu of any other expressed or implied warran-
ties, including any implied warranty of merchantability or fitness, and any other
obligation on the part of VDO North America, or selling dealer.
(NOTE: This is a “Limited Warranty” as defined by the Magnuson-
Moss Warranty Act of 1975.)
Siemens VDO Limited Warranty
To access and use the fine calibration function:
1. Press and release the pushbutton on the back of the
tachometer. This enables you to adjust the running
speed/difference ratio between –20% and +20%.
Adjustments are made in (+) or (–) steps of 0.5% by
pressing and holding the button. When the adjustment
is complete, release the button. After a short time, the
display reverts back to its normal mode. See Diagram J
for examples of:
Display 1: 0.0% difference to the adjusted value;
Display 2: 2.0% difference to the adjusted value;
Display 3: 2.5% difference to the adjusted value.
TO COMPLETE THE INSTALLATION:
Perform Step 4 of Section One on Page 1. When the
tachometer is secure in the panel, your installation is
finished.
4. Fine Calibration
When the ignition is on and power is supplied to the
tachometer you can select the fine calibration function
to very accurately adjust the running speed — differ-
ence ratio. This allows for compensation of alternator
slippage over various speed ranges, for example. This
function also allows for syncronization of two engines.
Diagram J
Fine calibration of the tachometer reading
NOTE:
If you move the pointer past the upper
limit of the calibration range, the LCD display will
flash and you will only be able to adjust the pointer
downward. If you move the pointer past the lower
calibration limit, the LCD display will also flash,
and you will only be able to adjust the pointer up-
ward.
VDO
then
or
Example #1
Example #2
Example #3
To manually calibrate the pointer on the analog display:
1. Press and hold in the button on the tachometer as you
turn on the ignition and start the engine. Hold in the
button until the word “
” shows up. When it does,
release the button. Set the RPM using a reference ta-
chometer at a value above idle (e.g. 2000 RPM).
2. Press the button once, and the word “
” will be
displayed on the LCD readout. Press it twice rapidly
then release it for a second, and the word “
” will be
displayed. So if you need an upward calibration of the
pointer, press the button once. If you need a downward
calibration, press the button twice rapidly and release it.
3. When either “
” or “
” is showing, press the button
again, and hold it in. If you hold the button in for just a
short time, the pointer will move slowly either upwards or
downwards, depending on which mode you selected. This
allows for a very accurate adjustment of the pointer. Hold-
ing the button in for a longer period of time makes the
pointer move faster.
Adjustments between – 30% and +100% are possible, but
must be done
WITH A REFERENCE TACHOMETER
ONLY!!!
Diagram I
Calibration of the analog (pointer) display on the
tachometer
3. Analog (Pointer) Calibration (
)
You can adjust the calibration of the tachometer’s analog
display (the pointer showing revolutions per minute) by
using speed test equipment and the “
” function on
the LCD readout. The pointer can be repositioned any-
where within the calibration range of the tachometer.
Adjust pointer by pushing
and holding in the
button on the
rear of the tachometer
VDO
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' (5+6'
72
It is recommended that these adjustments be done
only by experienced mechanics.
4. When you have repositioned the pointer where you
want it, release the button and wait. If no further adjust-
ments are made within one minute, the tachometer will
revert back to the normal operating mode.