SAMPLE GAS DEHUMIDIFIER DH6 Manual, Rev. 10/2020
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To adjust the set point temperature, the button has to be pressed. The display will show the set
point temperature, which now can be adjusted to a new value between 1ºC and 15°C in one de-
gree increments by turning the potentiometer with a small screw driver (supplied with the DH6).
Default setting is 5°C. The button has to be pressed and held all the time during setting the new
set point temperature. After releasing the button, the display will show the new set point temper-
ature flashing three times, and the parameter is saved.
Three LEDs on the digital display additionally are signaling the status as shown above.
The "warm" LED is activated if the set point temperature is exceeded by more than 1 K. The
Error relay is not activated. The LED is deactivated if the temperature reaches the set point tem-
perature (hysteresis of 1 K).
The "max. power" LED is activated upon maximum cooling power. This does not necessarily
mean any failure.
After power-on, both LEDs are activated for several minutes until the conditions for normal
operation are met.
In normal operation, all three LEDs are off, and the temperature inside the cooler is below the
set point plus 1 K. With increasing flow rate, temperature or dew point temperature of the sam-
ple gas, the cooler would increase the cooling power to compensate for the higher demand. If
any of the "warm" or "max. power" LEDs is on, the user should use the displayed temperature to
decide whether this still is well below the ambient temperatures around the gas path following the
dryer.
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Error Messages
The display shows several alphanumeric error messages:
