User Guide

Multiple Outdoor Sensor for Heating Controls
Product Instructions
Testing
A good quality test meter capable of
measuring up to 5,000 kΩ (1kΩ =
1000Ω) is required to measure the
sensor resistance. In addition to this,
the actual temperature must be
measured with either a good quality
digital thermometer, or if one is not
available, a second sensor may be
placed alongside the one to be
tested and the readings compared.
First measure the temperature using
the thermometer and then measure
the resistance of the sensor at the
control. The wires from the sensor
must not be connected to the control
while the test is being performed.
Using the chart below, estimate the
temperature measured by the sensor.
The sensor and the thermometer
readings should be close. If the test
meter reads a very high resistance,
there may be a broken wire, a poor
wiring connection, or a defective
sensor. If the resistance is very low,
the wiring may be shorted, there may
be moisture in the sensor, or the
sensor may be defective. To test for
a defective sensor, measure the
resistance directly at the sensor
location with the wires disconnected.
Do not apply voltage to a sensor at
any time as damage to the sensor
may result.
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