ASI294MC - Temperature control precision

ASI's Range of Specialised CMOS camera's

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ASI294MC - Temperature control precision

Post by allhoest » Sun Oct 20, 2019 2:09 pm


I ran the camera in cold environment, with a target T° of -30°.

At the first run, the measured temperature didn't change. I needed to disconnect the camera and reconnect again / restart Maxim to have the temperature from the sensor changing.

Then, when reaching around -30°, the sensor temperature continuously changed from -29.7 to -30.9°C.

I made a trial on an other computer, in room temperature.
With a setpoint of -5C, the sensor T° jumps from -4.5° to -4.9°; the TEC power was about 52%

Going from -5° to -10°, then the sensor temperature changes:

Then the temperature is unstable: -9.4, -10.0, -9.4, -10, etc.
The TEC power is 69%.

I wonder the behavior of the sensor T°
All cameras that I used show a precision of 0.1°, with a control at the target.
Also the ASI1600 doesn't not show strange behavior of the cooling control.

Is something wrong with this ASI294MC?


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Joined: Fri Dec 07, 2018 10:24 am

Re: ASI294MC - Temperature control precision

Post by Support1@ZWO » Mon Oct 21, 2019 12:15 pm

Hi Alex,
The tolerance of the cooling is ±1 degree.
When the target temperature getting lower, the ftemperature will be less stable.

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