Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG
23
and no extra calibration is required. In case of
replacement of a flow meter, a new calibration of
the unit to that other sensor is needed.
Therefor, install an additional calibrated flowmeter in
the cooling water circuit downstream of the sensor
to be calibrated and adjust a water flow of 90 l/min.
Starting from the normal surveillance mode, press
and maintain the „DOWN“-key (7), then press
additionally the „M“-key (3) once. Release then the
DOWN-key (7) and press again the „M“-key (3).
In the upper display line, the calibration factor is
shown, in the lower line, the word „CAL“ is shown
alternating with the actual flow value. With the „UP/
DOWN“-keys (2/7), you can now alter the calibration
factor in 0,01 steps within a range from 0,1 up to
9,99. Modify the calibration factor until the actual
flow value shown in the lower display line matches
the flow value measured with the additional flow
meter mounted downstream of the new sensor.
The new calibration factor is confirmed by pressing
the „M“-key (3). If no confirmation takes place, the
unit switches automatically back to normal surveil-
lance mode by using the former calibration factor.
