D 085
06/10
10k Solar Sensor 085
- Data Brochure
1 of 2 © 2010 D 085 - 06/10
Overview
Sensor Wiring
Installation
Waterproof
Corrosion Resistant
UV Resistant Wire
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Operating range -40 to 356°F (-40 to 180°C)
0.24 in (6 mm) OD for immersion well installation
5
ft (1.5
m) wire length
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Sensor wiring can be extended up to 520’ (158 m) using
18 AWG wire.
Wire splices should be properly soldered and protected
in an accessible waterproof junction box.
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A good quality test meter capable of measuring up to 5,000
kΩ (1 kΩ = 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 a thermometer is not available, a second sensor can
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 performed. Using the chart on the
following page, estimate the temperature measured by
the sensor. The sensor and 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.
Do not apply voltage to a sensor at any time as damage
to the sensor may result.
The tekmar Solar Sensor 085 has a stainless steel head and silicone jacketed wire, ideal for use as an immersion well
sensor in a solar collector.
Caution: Do not run sensor wires parallel to telephone or
power cables. If the sensor wires are located in an area with
strong sources of electromagnetic interference, shielded
cable or twisted pair should be used or the wires can be
run in a grounded metal conduit.
Controller effectiveness depends heavily on proper
installation of temperature sensors. The 085 sensor should
always be measuring the hottest part of the collectors which
is normally the flow output of the last collector in a string.
The Solar Sensor 085 was specifically designed to mount
in a 6.2 mm ID temperature sleeve or well provided by
most collector manufacturers.
If a temperature well isn’t available, the Solar Sensor 085
can be strapped directly to the pipe using a stainless steel
clamp (not provided).
Insulation should be placed around the sensor in this case
to reduce the effects of air currents on the temperature
measurement. Thermal paste is recommended to improve
thermal contact with the sensor.
Sensor Testing Instructions
Insulation
around
sensor & pipe
Stainless steel clamp
6.2 mm ID
Sensor well
(12 pages)
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