5
First start-up
Connect a type CUS 31 or CUS 41 sensor to the CUM 252 transmitter. After power-up, the
measuring chain is ready to measure turbidity (in FNU units) without requiring calibration. If you
intend to measure the solids concentration in ppm, g/l or %, you should select the measured
quantity/unit and the calibration data set after power-up (see chapters 7.1 and 7.4), and then
calibrate the sensor if necessary (see chapter 7.6).
Note:
Familiarise yourself with the operation of the measuring instrument before switching it
on for the first time!
Caution:
Before power-up, check that all connections have been properly made!
Warning:
Before power-up make sure that there is no risk of damage to the system the
instrument is a part of; for example, due to valves or pumps that might operate in an
uncontrolled manner, etc.
Power-up, test
After power-up, the instrument performs a
self-test and then starts up in the measuring
mode.
If the display is similar to figure 5.1, the
instrument is functioning properly.
The measured values shown on the display
may be different.
In order to check the alarm function as well as any connected alarm signalling device, the
current supply can be interrupted for a moment. All configuration data will be retained.
The relays can be operated manually for function checks, maintenance work, etc.
See chapter 6.6, Auto / manual mode of operation.
Fig. 5.1
Display after power-up and completion of
self-test
First start-up
liquisys CUM 252
14
Hauser
