Note!
To calibrate the currently used gas, its display
value must be at least 85 % of the adjusted
upper measuring range value
Δ
p100.
Calibration of the span is subject to particular
protection (switch
3
) to prevent the span from
being changed unintentionally due to im-
proper operation of the keys.
Checking the measuring range (span)
When the
key is pressed five times in dis-
play mode, the value for the max. differential
pressure
Δ
p100
is indicated.
4
Check zero as described in section 6.3.
4
Press
key five times. Display shows
Δ
p 100 = X.XXX (x1000) mbar.
4
Use a precision regulator to apply a test
pressure corresponding to the max. differ-
ential pressure
Δ
p100 while monitoring
the pressure gauge.
Set points:
Δ
p = 0 mbar = 4 mA (see also note
on gas column correction on page 23)
Δ
p100 = XXXX mbar = 20 mA
When display and output signal do not match
the indicated
Δ
p100 value, readjust the up-
per range value (span).
Adjusting the measuring range (span)
4
Check zero as described in section 6.3.
4
Deactivate write and span protection by
setting both switch
4
and switch
3
to posi-
tion
OFF
.
4
Press
key five times. Display shows:
Δ
p100 = X.XXX ( x1000 ) mbar.
4
Use a precision regulator to apply a test
pressure corresponding to the max. differ-
ential pressure
Δ
p100 while monitoring
the pressure gauge.
4
Press and hold
key until display shows
currently measured value. Current signal I
indicates current value in mA.
4
Press
key to calibrate the span. Current
signal becomes 20 mA, display corre-
sponds to
Δ
p100.
4
Release
key. Reactivate write and span
protection by setting switch
4
and switch
3
to position
ON
.
6.5 Setting the limit switches
6.5.1 Max. filling limit during oper-
ation
Note!
The filling limit during operation preset by the
software can be modified only in filling level
mode using the operating keys.
UCW
marker
4
Deactivate write protection by setting
switch
4
to position
OFF
.
4
Press and hold
key until, after approx.
8 s,
UCW
is shown at the top and the asso-
ciated value in % at the bottom of the dis-
play.
4
Press
key to confirm display.
4
Press
key to reduce value in steps of
1 %, or
4
Press
key to increase it.
4
Press
key to confirm adjusted value.
4
Reactivate write protection by setting
switch
4
to position
ON
.
EB 9527-3 EN
25
Adjustment
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