MeterMatch
™
Overview
The MeterMatch™ Model MM-02 by TechnoVersions LLC is for
making analog gauges more accurate, or to allow you to mix
and match different gauges and senders. It can be used with
many gauges that have resistive senders - such as common
fuel, oil-pressure and temperature gauges. In addition, it allows
you to have low and/or high set-points that will trigger a bright,
flashing LED indicator to alert if the gauge exceeds normal
values.
Note: If you are having trouble reading the small print of this instruction manual, go to the
TechnoVersions.com website and open the on-line copy that you can print out full size.
Theory of Operation
MeterMatch is wired between your sender (sensor) and your gauge. It reads the resistance of the
sender, then based on the calibration values, controls the current through the gauge to drive it to the
desired reading. It treats the input and output entirely separately, so it doesn't care if the input to the
gauge is scaled differently than the sender, or even if the sender signal is reversed - it can correct for
that. In the graphic above, prior to installation the green lines would be connected together.
MeterMatch interrupts that signal to process it and make corrections.
To calibrate MeterMatch, you first set the sender to a known value. For example, fill your fuel tank.
Set the MeterMatch to program mode, then with Up and Dn buttons, make your gauge read what you
want for that sender value. When you are happy with that, press the Save button, and the value is
