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Emerson Process Management GmbH & Co. OHG7-34
X-STREAM X2
Instruction Manual
HASX2E-IM-HS
02/2012
7.4.4.2 Modbus Activated Calibrations Without Valves
7.4.4 Remote Calibrations
Several Modbus commands allow to start
calibrations (
Chapter 9, List of Modbus
Commands).
If the analyzer does neither provide internal
valves nor digital inputs and outputs (for con-
trolling external valves), then the procedure
corresponds to the manual calibration, with
the Modbus commands replacing the manual
front panel button keypresses.
This means, the Modbus command imme-
diately starts the calculation. The operator
has to ensure in this moment, the proper gas
is applied and the measuring system is lled
with calibration gas. If applicable, he also has
to take care to not activate a span calibration
without a preceding zero calibration.
For detailled instructions about manual cali-
bration
7.3.2, page 7-15.