KROHNE H250 M8-M9-M10 EN - Manual (Page 42)

5
START-UP
42
H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
Start-up
5.1 Standard device
A minimum operating pressure (primary pressure) is necessary to operate the device:
5.2 Indicator M10
Start
After the device is switched on, the display shows the following in sequence
• "Test",
• the device type and
• the version number.
Afterwards the device performs a self-test and switches to measurement mode. Here all of the
parameters preset for the customer are analysed and checked for plausibility, and the current
measured value is displayed.
Operation
CAUTION!
When starting up the device, the following points must be observed:
• Compare the actual operating pressure and the product temperature of the system with the
specifications on the nameplate (PS and TS). These specifications may not be exceeded.
• Make sure materials are compatible.
• Slowly open the shut-off valve.
• When measuring liquids, vent the pipes carefully.
• When measuring gases, increase pressure slowly.
• Avoid float impact (e.g. caused by solenoid valves), as this is likely to damage the measuring
unit or float.
Medium Pressure loss : operating pressure
Liquids 1 : 2
Gases without float damping 1 : 5
Gases with float damping 1 : 2
INFORMATION!
The device is always preset for the user and his application.
INFORMATION!
The device is low-maintenance
Comply with the application limits with regard to temperature of the medium and ambient
temperature.
MA_H250_R02_en_269302_PRT.book Page 42 Tuesday, April 12, 2011 10:17 AM