Automatic Reset; Measuring High Oxygen Concentrations - Siemens SIPROCESS GA700 Quick Start Manual

2.3.3

Automatic reset

All SIPROCESS GA700 devices feature internal monitoring. When this monitoring is
activated, the standard digital outputs switch after about 4 seconds for a period of approx. 60
seconds to "inactive", i.e. to a recognized safe operating mode. These times are valid for
devices manufactured as of 09/2017. You can find this information on the nameplate. It can
take up to 10 seconds for older devices to switch over, and up to 100 seconds to switch to
safe operating mode.
If you are using SIPROCESS GA700 devices in critical processes, observe the following
information:
● Monitor the limits externally via the control system.
● Read out the device status only via the digital outputs of the analyzer module.
● Use an available manual measuring range switchover instead of the autoranging.
● Only use the "Total" parameter with the "Off" setting for the measuring range switchover.
● If you use the "Correction of cross-interference" and "External pressure compensation"
functions, store suitable substitute values.
● Only access the measured value via an analog output.
2.3.4

Measuring high oxygen concentrations

For the measurement of high O
that all parts that come in contact with the sample gas are free of oil and grease and do not
contain any particles that could react with O
We highly recommend you use specially cleaned analyzer modules with the "Cleaned for
O2" option for such measurements.
Quick Start
Compact Operating Instructions, 06/2017, A5E31805656-05
concentrations in excess of 25%, it is absolutely necessary
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General information
2.3 Information on use
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