WIKA CPG1000 - Handbuch (Seite 19)

WIKA operating instructions model CPG1000 19
11568047.02 08/2012 GB/D
GB
4. Design and function
4.5.1 Battery replacement
WARNING!
Do not change the alkaline batteries in hazardous area!
Rotate the faceplate of the CPG1000 to the left by approx. 90° and remove it. After that the
front panel of the pressure gauge can be removed and the battery compartment is acces-
sible. Insert the three AA-sized alkaline batteries in correct polarity.
WARNING!
Always use AA alkaline batteries and observe the correct polarity. During
enclosure assembly ensure that the front is aligned properly.
4.5.2 Battery life time
The battery life time is 1,500 hours (62 days) for continuous operation (without background
illumination). In the lower left corner of the display there is a symbol for the battery capacity.
This symbol appears if the battery voltage is too low. For instructions on batteries refer to
chapter 3 "Specifications".
4.6 RS-232 interface
The CPG1000 has as standard an RS-232 interface. Only the interface converter offered
by WIKA may be used. The serial data transmission can be used for configuration, calibra-
tion and transmission of the instrument’s measured values.
WARNING!
The RS-232 interface must not be used in hazardous areas.
4.7 Connections
The CPG1000 uses a ¼ NPT male thread connection for its process connection. An
adapter on G ½ male thread is included in the scope of delivery. Different adapters may
be necessary for connection to the pressure reference standard. When screwing the NPT
thread of the CPG1000 to an adapter or a process connection, it is necessary to use an
additional sealing compound, e.g. Teflon tape between the threads. The hose, lines and
fittings etc. must always be approved, as a minimum, for the working pressure which corre-
sponds to the pressure of the instrument. In addition, there must be no leaks during the
calibration process. If necessary, seal using Teflon tape.