LEYBOLD 157 89, Manual

Page: 15 / 40

Page 9
Note
On parameter page 9 of instrument parameter level 2
there are different displays for the THERMOVAC channel
and the PENNINGVAC channel.
Page 9 for the THERMOVAC channel (TM)
Cable length adjustment for the THERMOVAC gauges.
Note
Equipment parameter page 9 is used to enter the length
of the cable for THERMOVAC gauge heads.
After calling up parameter page 9 the display will indica-
te „CL xxx“.
CL
Cable length
xxx Length in m
By operating the increment or decrement keys it is pos-
sible to enter cable lengths in the range between 0 m and
100 m in 5 m increments (5 m, 10 m, 15 m, 20 m, 25 m
etc.). The default setting is 5 m.
Note
Intermediate values must be rounded off.
The values only apply to standard cables 6 x 0.14 mm
2
.
Note
When combining a TR 211 gauge from series B1 or later
or a TR 215 / 216 and TM channel from software revisi-
on 2.0 or later the lenght of the gauge head cable is auto-
matically accounted for by means of automatic cable
lenght alignment. „CLA“ will be displayed on parameter
page 9.
Page 9 for the PENNINGVAC measurement
channel (PM)
Adjustment of the analogue output (for this also see Sec-
tion 2.10.3).
Seven different ranges can be set up.
Logarithmic output characteristic:
Ano
-8
: log 1·10
-9
- 1·10
-2
mbar (1.43 V / decade)
Linear output characteristic:
0 0,1 1 ... 5 V ... 10 V
Anl
-7
: 1·10
-9
1·10
-8
1·10
-7
mbar
Anl
-6
: 1·10
-8
1·10
-7
1·10
-6
mbar
Anl
-5
: 1·10
-7
1·10
-6
1·10
-5
mbar
Anl
-4
: 1·10
-6
1·10
-5
1·10
-4
mbar
Anl
-3
: 1·10
-5
1·10
-4
1·10
-3
mbar
Anl
-2
: 1·10
-4
1·10
-3
1·10
-2
mbar
Page 10 for the THERMOVAC measurement
channel (TM)
Adjustment of the analogue output (for this also see Sec-
tion 2.10.2).
Eight different ranges can be set up.
Logarithmic output characteristic:
Ano
-3
: log 1·10
-3
- 1000 mbar (1.67 V / decade)
Ano
-4
: log 5·10
-4
- 1000 mbar (1.587 V / decade)
Linear output characteristic:
0 0,1 1 ... 5 V ... 10 V
Anl
-2
: 1·10
-4
1·10
-3
1·10
-2
mbar
Anl
-1
: 1·10
-3
1·10
-2
1·10
-1
mbar
Anl
+0
: 1·10
-2
1·10
-1
1·10
+0
mbar
Anl
+1
: 1·10
-1
1·10
+0
1·10
1
mbar
Anl
+2
: 1·10
+0
1·10
1
1·10
2
mbar
Anl
+3
: 1·10
1
1·10
2
1·10
3
mbar
2.3.9.2 Locking of parameter settings
By locking the parameter settings, the entered and sto-
red parameters may be protected against any unquali-
fied changes.
When parameter page 5 is displayed (software release
number) pressing the PARA key of the TM 1 measure-
ment channel for more than 5 seconds will lock up all
parameters and prevent any further parameter changes.
The „LOCK“ message will come on. With the „LOCK“
message on, it is only possible to check the settings of
the parameters. However, keys TM 1, TM 2 and PM
remain accessible.
Unlocking is only possible by displaying the number of
the software release of the TM 1 measurement channel
once more (parameter page 5) and by pressing the
PARA key for more than 5 seconds.
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