TECPak
User’s Manual · Page 29
state. Later, if the logic input goes from true to false, then the output will be
turned off.
In this way, on/off operation can be supported simultaneously through the
analog interface and the PC interface without conflict.
On/Off Status Output
This logic level output reflects the present output state of the instrument.
When it is on and controlling the temperature, this output will be high.
Stable Status Output
The output is considered stable when the temperature has remained within
the temperature band around the set point (as defined by the tolerance
temperature) for a specific amount of time (as defined by the tolerance
time). Once the temperature is considered stable, then this logic level
output will be set to high. If the set point is changed, or a disturbance
causes the actual temperature to fall outside the tolerance temperature,
then this logic level output will be set to false, and the process starts over.
The output will also be false whenever the output is off.
In addition, there are two analog signals: analog set point input, and analog
monitor output.
Analog Set Point Input in Temperature (T) Mode
The analog set point input allows the user to change the temperature set point
using a voltage signal. The voltage input range goes from 0V to 2.5V, and the
transfer function is:
T
SETPOINT
= (V / 2.5 * (T
ANALOG-HIGH
– T
ANALOG-LOW
)) + T
ANALOG-LOW
Where V is the voltage input, in volts, and T
SETPOINT
is the resulting temperature
set point, in
°
C. T
ANALOG-HIGH
and T
ANALOG-LOW
can be adjusted using the
TEC:ANALOG:THIGH and TEC:ANALOG:TLOW commands, respectively.
CAUTION
The maximum allowable voltage input range on the
analog input is -01V to +3V. Be sure not to exceed this
range or damage to the instrument may occur.
Summary of Contents for TECPak 585 Series
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