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Emerson Process Management GmbH & Co. OHG7-32
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
7.4.4.1 Calibrations Initialized Via Digital Inputs
7.4.4 Remote Calibrations
As already mentioned, the analyzer must eit-
her provide internal valves or external valves
( connected to its digital outputs), to make use
of this feature.
Chapter 4 for information about electrical
data and installation of digital inputs and
outputs.
Depending on the assigned function, digital
inputs are either edged triggered or level
triggered and have different priority classes:
Signals of priority class I are of higher priority
as the signals of class II: if any valve is activa-
ted by a digital input, the moment a calibration
is started by another digital input, this input
(better: the related procedure) takes control
of the valves.
Beside this, there are some more conditions
to observe (see notes in table 7-3):
1) "Cancel Calibration" has an effect on on-
going calibrations only: Applying a signal
without a calibration ongoing does not
work as an inhibit signal for future calibra-
tion signals.
Tab. 7-1: Digital Inputs Priorities
Assigned Function Trigger Mode Priority Class Priority inside Class
Cancel Calibration
1)
edge triggered I
"Cancel Calibration" has the
highest priority within this class.
For the other function applies:
Whichever signal is applied rst
activates the related function
ZeroAll
SpanAll
ZSCalAll
V1 ... V8, sample
2)
level triggered II
"V1" has highest priority, decrea-
sing to "sample" with lowest priority
Pump
3)
level triggered (none)
these signals may be applied in pa-
rallel to all other signals, including
those of other priority classes
Zoom1 ... Zoom4
1) 2) 3) see paragraphs below
2) The sample valve is activated, if no other
valve (V1 ... V8) is activated, AND
• the sample valve is NOT assigned a
digital input (auto ON)
OR
• the sample valve is assigned a digital
input and this input is activated.
3) If a digital input is assigned to Pump, this
pump is controlled by this digital input
ONLY, not any longer by the software menu.
If ALL valves are closed, the pump is
always switched off automatically, regard-
less of how it is controlled.