64 EL3060 CONTINUOUS GAS ANALYZERS | OI/EL3060-EN REV. A
Activation
Automatic calibration is only performed if it has been activated. The "Off"
setting is only effective for the cyclic time-controlled start of automatic
calibration; it does not apply for the externally controlled start and the
manual start.
Cycle time
The cycle time must be set in the configurator. It specifies the intervals at
which automatic calibration is carried out.
Date and time of the next automatic calibration
The gas analyzer carries out the next automatic calibration at the time set
here. The cycle time starts from this point of time.
End-point calibration together with zero-point calibration
The cycles in which end-point calibration is to be carried out together with
zero-point calibration must be set in the configurator.
Example: End-point calibration at every 7th zero-point calibration
With a cycle time of 24 hours, this setting causes a zero-point calibration to
be carried out every day and an end-point calibration once a week.
If the automatic calibration is started manually, a zero-point and an
end-point calibration are always carried out; the cycle configured for the
time-controlled calibration is not affected by this.
Output current response
The configurator must be used to set whether the signals at the current
outputs (analog outputs) follow the changes in measured values during the
calibration or are held at the last value measured before the start of the
calibration.
If the current signals are configured to "hold", the alarm value monitoring is
not active during the calibration.
The setting of the output current response is effective for both automatic
and manual calibration.
Uras26: Automatic calibration with or without calibration cells
If the Uras26 analyzer is equipped with calibration cells, automatic calibra-
tion with calibration cells is to be activated ex works.
If the automatic calibration with calibration cells has been deactivated for
individual sample components in the configurator and it is to be carried out
with test gases instead, please note the following:
• The test gases for the zero-point and end-point calibration must be fed
in via solenoid valves; control of the solenoid valves via digital outputs
must be configured (see page 95).
• The automatic calibration is executed in the following steps:
1 The zero reference gas is fed in, and all the sample components are
calibrated at the zero point.
2 The zero reference gas remains connected, and the sample compo-
nents with an activated calibration cell are calibrated at the end
point.
3 The span gas is fed in, and the sample components with a deac-
tivated calibration cell are calibrated at the end point.
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