CU-EMA+
5 Operation and control
NOTICE
Only operate the device with the door closed and within the specifications!
After starting the device via circuit breaker FC43, the display of the sample gas cooler will show the software version, then the
block temperature. The display S2 will stay on until the block temperature has reached the preset value (± adjustable alarm
range). The status contact is in the Alarm position.
Once the target temperature range has been reached and the moisture detector does not report an error, the temperature will
continuously be displayed and the status contact switches over. With the optional regulated heated line, the temperature signal
will also be sent to the status contact.
If the display flashes during operation or an error message appears, please refer to item "Troubleshooting”.
Please refer to the data sheet for performance data and maximum ratings.
5.1 Description of functions
The sample gas cooler is controlled by a microprocessor.
The programmable display shows the block temperature in the selected display unit (°C/°F) (factory preset °C). Application-spe-
cific settings can easily be configured guided by the menu, using the 5 buttons. For one, this applies to the target outlet dew
point, which can be set from 2 to 20 °C (36 to 68 °F) (factory setting 5 °C/41 °F).
And then the warning thresholds can be adjusted for low and excess temperature. These are set relative to the outlet dew point
τ
a
setting. For the low temperature the range is
τ
a
-1 to - 3 K (at a minimum 1 °C cooling block temperature), for the excess tem-
perature the range is
τ
a
+1 to +7 K. The factory settings for both values are 3 K.
The flashing and an LED on the display unit plus the potential-free contact indicate the warning range has been overrun or un-
derrun (e.g. after switching on) plus the potential-free contact.
11
Bühler Technologies GmbH
BE440029 ◦ 10/2020
