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drawing. It is not recommended to use a PT 100 sensor since the accuracy and resolution will be
poor.
Steinhart mode: The regulator board is calculating the temperature of an NTC resistance by using
Steinhart equation. Normally the NTC sensor is difficult to use, but after correct Steinhart values are
selected, the temperature is very accurate in the area where the points are selected. Note that normal
values for Gain are 1, and Offset is 0, in this mode. If gain and offset are changed, the result from the
Steinhart equation is affected. Please contact Laird Technologies for more information.
Sensor 2, 3, 4
Additional sensors can be used for monitoring multiple temperatures and alarms. They can also be
used as feedback for the fans when algo mode is used. As previously shown, it is possible to change
in the edit box the name, and all parameters in the regulator that are used to calculate the
temperature of the sensor input.
Sensor 4 is mounted on the metal bracket of the PR-59 and is monitoring the temperature of the
bracket so the PR-59 does not over heat. Default alarm level is set to 60°C and if it is reached, an
external fan is required for additional cooling.
5.6 Regulator
Allows user to operate Thermoelectric Assembly in three modes: on/off, thermostatic control with
hysteresis (algo) or thru custom algorithm via Proportional Integral Derivative (PID).
Regulator mode
This is the heart of the regulator unit. Here the regulator mode is defined by parameters to get the
best performance specific to an application. Regulator can function in one of the following modes:
Off, Power, Algo, P, PI, PD, PID mode.
Off
Regulator will turn off
Power
This mode is used to directly control the output power. It can be useful when determining the
response of a system. You can either connect a potentiometer to the External pot-connector, or can
feed a voltage to the center pin of the External pot-connector where 0V = -100%, 2.5V = 0% and 5V =
