LEYBOLD 157 89, Manual

Page: 8 / 40

2 Operation
2.1 Start-up
Please refer to the technical data of this instrument to
determine whether or not this instrument suits your appli-
cation.
For safety reasons please check the following before
connecting the instrument to the AC power:
- The correct line voltage setting (on the rear)
see Fig. 1.
If it has to be changed, refer to Section 2.2.1
- The use of the correct line fuse.
For this refer to Section 2.2.1.
The COMBIVAC CM 31 is supplied ready for immediate
use.
Connect the gauge head via the corresponding gauge
head cable (refer also to Section 2.4).
Connect the AC power voltage to the CM 31 via the sup-
plied power cord. After applying power to the instrument
it runs a self test. When in progress, all display elements
come on briefly.
Depending on the operational status of your vacuum
system you will now get a corresponding pressure rea-
ding. Via keys TM 1, TM 2 or PM it is possible to select
the required gauge head.
Check or adjust the equipment parameters as appro-
priate according to Section 2.3.9.
Note
After having applied the mains voltage and after comple-
tion of the self test or after having exchanged a sensor
(TM channel) „TEST“ and „noSEn“ will be displayed
alternatingly for 1 to 5 seconds. While this is in progress
the instrument is trying to determine which THERMO-
VAC sensor is connected to the TM channel.
2.2 Electrical connection
Caution
Before applying power to the instrument
for the first time, please carry out the fol-
lowing steps:
- Check and if required adapt the line
voltage setting to the local line voltage.
- Check and if required exchange the
built-in line fuse (see Section 2.2.1).
The line voltage of the CM 31 is set to the value which is
indicated upright on the AC power socket (legible) and
which points to the arrow (1/3) on the right side.
Integrated into the AC power socket is the line fuse and
the voltage selector for 4 different line voltage ranges.
The line voltage is applied to the instrument via the sup-
plied detachable power cord. An AC power socket (7/5)
is provided on the rear for connection of the power cord.
Warning
Only 3-conductor power cords with
safety ground may be used. The instru-
ment may not be operated with an un-
connected safety ground conductor.
8
Key to fig. 1
1 AC power socket
2 Fuse insert
3 Arrow for indication of the line voltage setting
4 Slot for applying a screwdriver
Fig. 1 AC power socket (line voltage setting 230 V)