Does 0ct (=0V) at DAC mean no current for heater? (Is there no offset between DAC output and temp. controller?)
Figure 1 shows the temperature change when DAC output was changed as
0ct -> -3000ct -> +3000ct -> 0ct.
There is no change in temperature during negative output.
Figure 2 shows output count to temperature actuator and uncalibrated temperature.
Calibration factor is roughly -0.031K/ct.
For the negative output, heater cannot give any actuation.
Finally output is saturated at -15000ct by software limit.
We need to modify the k1psl in order to record calibrated temperature.
Current model cannot be record calibrated value even EPICS channel
because "_OUT16" and "_OUTPUT" don't work due to the output switch.
"_OUTMON" is not recorded.
