Testing calibration, Ppr (tachometer calibration), Operation – Auto Meter 1290 User Manual

Page 3: Electronic speedometer calibration made easy!), For service send to: auto meter products, inc

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12 mONTh LImITEd WARRANTY

Auto Meter Products, Inc. warrants to the consumer that all Auto Meter High Performance products will be free from defects in material and workmanship for a period of twelve (12) months from date of the
original purchase. Products that fail within this 12 month warranty period will be repaired or replaced at Auto Meter’s option to the consumer, when it is determined by Auto Meter Products, Inc. that the product
failed due to defects in material or workmanship. This warranty is limited to the repair or replacement of parts in the Auto Meter instruments. In no event shall this warranty exceed the original purchase price of
the Auto Meter instruments nor shall Auto Meter Products, Inc. be responsible for special, incidental or consequential damages or costs incurred due to the failure of this product. Warranty claims to Auto Meter
must be transportation prepaid and accompanied with dated proof of purchase. This warranty applies only to the original purchaser of product and is non-transferable. All implied warranties shall be limited in
duration to the said 12 month warranty period. Breaking the instrument seal, improper use or installation, accident, water damage, abuse, unauthorized repairs or alterations voids this warranty. Auto Meter
Products, Inc. disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by Auto Meter.

SERVICE

For service send your product to Auto Meter in a well packed shipping carton. Please include a note explaining what the problem is along with your phone number. Please specify when you
need the product back. If you need it back immediately mark the outside of the box “RUSH REPAIR,” and Auto Meter will service product within two days after receiving it. ($10.00 charge will
be added to the cost of “RUSH REPAIR.”) If you are sending product back for Warranty adjustment, you must include a copy (or original) of your sales receipt from the place of purchase.

FOR SERVICE SEND TO:

AUTO mETER PROdUCTS, INC.

413 W. Elm St., Sycamore, IL 60178 USA (815) 899-0801

Email us at [email protected]

2650-1175-00 Rev. B 12/18/07

©

2007 Auto Meter Products, Inc.

Once the instrument is mounted and wired into the vehicle (see preceding page), the instrument should be tested to verify that the electrical
connections are working properly. First, watch the instrument’s pointers as power is applied with the key in the accessory position. The pointers
should first move to a midrange position, then down to the zero position on the dial. This action verifies that power is properly connected to the
instrument. Start engine. Tach should show idle RPM. The vehicle should be driven some distance to verify the Vehicle’s Speed Sender (VSS)
is connected properly and that the pointer moves. If the pointer does not move out of the zero position, verify that the VSS is connected properly
and that calibration has been performed

Testing

Calibration

(Electronic Speedometer calibration made easy!)

To calibrate your electronic speedometer:
1) With the power off, push and hold the trip/reset button. While holding the button, start the vehicle and continue to hold the button until the pointer sweeps to full scale and

stays at full scale. You may now release the button.

2) Drive to the beginning of a pre-marked 2 mile distance and come to a stop. It does not matter how far away it is to get to this pre-marked 2 mile distance. DO NOT SHUT THE

ENGINE OFF. Push and release the button. The pointer will drop to half scale.

3) Drive the 2 mile distance. The pointer will remain at the half scale mark no matter what speed you drive. If the speedometer has a LCD display odometer, it will be normal to

see it counting rapidly as it is receiving a speed signal. If you have to stop during the calibration, that is o.k. The speedometer will simply stop counting pulses during this time.

4) At the end of the 2 mile distance, come to a complete stop and push and release the button. The pointer will drop to 0 and the calibration is stored. You are now finished.
Remember the accuracy of your 2 mile distance will directly affect the accuracy of your speedometer.
The following list contains factors that can affect speedometer accuracy and how to minimize them during calibration.

1. Tire diameter increases slightly as vehicle speed increases. To minimize this error drive at an average speed of 45 MPH (175 KPH) during calibration.

2. Tire diameter increases slightly as tire air pressure increases. To minimize this error, check the vehicle’s tires to ensure correct air pressure.

3. Tire diameter changes with vehicle load. Minimize this error by having an average load in the vehicle during calibration.

4. Minimize tire slippage error by not breaking traction during calibration.

Note: Always recalibrate your speedometer after any tire size or differential ratio change.

With the power off, push and hold Odometer Trip button
While holding the button, turn power on to gauge by turning the key to the accessory position, and continue to hold trip button in while pointer
moves to 1/2 scale. Release the trip button once the pointer reaches 1/2 scale. The Odometer will show 0.5

NOTE: If the Trip button is held for 2 seconds or more, the gauge will enter PPM set mode. If this happens, press and release the Trip button. The
pointer will move to 1/2 scale. Press and realease the Trip button again. The pointer will move to the zero position. Turn off the power to the gauge
and repeat the PPR set procedure from the beginning.

The Odometer display will change, every 1.25 seconds to 1.0, then 1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0, and back to 0.5. It will continue to cycle
in this manner until the Trip button is pressed for 1 second and released. This enters the displayed PPR value and exits field cal mode.

PPR (Tachometer Calibration)

When power is first applied to the gauge, the odometer will display the current, PPM calibration, then the current, PPR calibration. Then it enters normal
operation mode and displays the odometer or trip miles, depending on the state of the odometer (total miles or trip) when it was last turned off.

Operation

ENGINE

Most 2 cyl.

Most 4 cyl.

Most 6 cyl.

Most 8 cyl.

PPR

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

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