Inficon XL3000flex, Translation Of The Original Operating Instructions

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INFICON Operation | 6
XL3000flex-Operating-instructions-jina83en1-07-(2105) 47 / 108
The upper limit (= 10 V) is set via the parameter "Upper limit exponent". The lower value is always 0 (leak
rate), which corresponds to 0 V output voltage. The exponent of the upper limit can be set in entire decades,
such as 1 x 10
-4
mbar l/s.
Settings > Set up > Interfaces > I/O module > Analog scale > AO exponent upper limit.
This setting is for both analog outputs, if an appropriate output function is selected. Depending on the selected
leak rate unit there is a different absolute limit.
The selected range can be additionally narrowed by the limits, which is valid for all interfaces, see above.
Leak rate log. x ... 10 V; logarithmic;
in the selected unit
The upper limit (= 10 V) and the scale (V / decades) are set via the parameters "Upper limit exponent" and
"Scale for leak rate". For example:
Upper limit set to 1 x 10
-5
mbar l/s (= 10 V). Scale set to 5 V / decade. Lower limit is at 1 x 10
-7
mbar l/s (= 0 V).
The logarithmic output function of both the slope in V / decade as well as the upper limit (10 V limit) can be set.
This results in the minimum displayable value. The following slopes are available: 0.5, 1, 2, 2.5, 3, 5, 10 V/The
higher the selected slope value, the smaller the displayable area. The logarithmic settings are the most useful
when several decades can be displayed, so a setting of <10 V / decade. The upper limit is the same for both
analog outputs. In both of the following figures the 1 V / decade and 5 V / decade with different upper limit
settings are exemplified. Depending on the selected leak rate unit there is a different absolute limit. The
selected range can be additionally narrowed by the limits, which is valid for all interfaces, see above.
Set by interface The output voltage can be specified for tests with the LD log command
221.
Leak rate Ma. Hys. 0.7 ... 10 V; linear;
in the selected unit
Useful only if the other analog output
is assigned "Leak rate exponent".
Through an overlap of the mantissa in
the range 0.7 to 1.0, a constant
jumping between two decades is
prevented. 0.7 V corresponds to a
leak rate of 0.7 x 10
-x
. 9.9 V
corresponds to a leak rate of 9.9 x 10
-
x
.
Pressure p1 (1 V / Dec.)/
Pressure p2 (1 V / Dec.)
1 ... 10 V; 1 V / decade;
2.5 V = 1 x 10
-3
mbar;
8.5 V = 1000 mbar
Leak rate log. H./
Leak rate exp. Inv.
Special function. Use only on
the recommendation of
INFICON.