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586
TECPak
User’s Manual
any danger to TEC devices due to the relatively short duration of the over-
voltage condition.
For the voltage limit to engage, the following conditions must be met:
TEC:LIM:V is set to
1V
or higher
At least 25mA of TEC current
The second point is to ensure there is a sufficient current signal that can be used
in calculating the load impedance (and therefore limit the current to correctly
limit the voltage).
Operating at the voltage limit is common, especially when transitioning from one
temperature to another. There is no harm or danger to the
TECPak
when
operating in this condition.
Understanding the Sensor Inputs
The
586
TECPak
supports two primary sensor inputs, and either input can be
used to control the temperature of your device or mount.
The two sensor inputs support:
Sensor 1 supports thermistor, LM335, RTD, and 4-wire RTD sensors.
Sensor 2 supports thermistor and RTD sensors.
One or both can be enabled for monitoring, but only one can be used for the
control loop. The primary sensor selected for the control loop is called the
Active Sensor
. Use the TEC:ACTIVESENSOR command to change the active
sensor.
The
TECPak
has no auxiliary sensor inputs.
For best system performance, unused sensor inputs should be disabled.
Applying Sensor Limits
With the wide range of sensor connectivity options, the
586
TECPak
is designed
with a series of temperature protection limits and options to allow for flexibility
when meeting the demands of different applications.
Each sensor has a dedicated high and low temperature limit, set using the
TEC:LIM:THI or TEC:LIM:TLO commands. When the temperature input exceeds
these limits, that sensor is considered to be in limit, either high or low. Limit
