0 to 1M Thermistor
This procedure shows how to configure the Series 800/850 TEC Controllers for use
with a 0 to 1M Thermistor.
ç Before changing the jumper settings on the Series 800/850 TEC
Controllers, remove ALL connections (including the AC power)
from the rear of the instrument and remove the cover.
¾ Setup the hardware for Thermistor (0 to 1 Megohm) as follows:
NEG
POS
GND
Thermistor
Mating Connector
THERMISTOR-1M
PCB
Rear Panel ConnectionsJumper Settings
ç Replace the cover of the Series 800/850 TEC Controllers by
sliding it back over the top of the controller and replace the
screws that were removed. Reapply ALL connections.
Front Panel Programming
Pressing ¿¯ simultaneously for 6 seconds will get you to the [`set] Menu in the
bottom display. Cycle through using ¿ or ¯ until you reach [inp1] in the top
display, then press ‰. Cycle through using ‰ to select the parameters to change in
the bottom display. Change the parameters by using the ¿ or ¯ arrows.
1. [Sen1] = [Proc} Remember the parameter to change is in the
lower display.
2. [In`1] = [0-10] The variable to change is in the upper display.
3.
[deC1] = [``)0] Change [deC1] first before [rL`1] &
[Rh`1] since changing the decimal point will
automatically load defaults into [rL`1] &
[Rh`1].
4. [rl`1] = [``)0] Range Low in Kohms.
1
5. [rh`1] = [99(9] Range High in Kohms. (See footnote)
6.
[Ftr1] = [``!0] Filter, this is optional. See Chapter Five
under “Filter Time Constant” for more
information.
ALPHA OMEGA INSTRUMENTS CORP. Instruction Manual
Series 800/850 Thermoelectric Cooler Controller Page 24
1
Thermistors have a fixed output based on the current flowing through them (i.e. 10uA). Therefore, the only way to read out
°C,°F, or °K is to use the optional EIA/RS-232/485 interface in conjunction with either Alpha Omega’s own TECView software or
a 3rd party MODBUS compatible program to convert the temperatures.
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