MSA SUPREMA - Page 60

REV 0, June 2005Page 60
Operation Manual SUPREMA
4. Operation of the System
At preliminary calibration the difference signal Ux for zero gas is set to 0 mV. At all following
calibrations the current difference signal is always based on the defined value.
Bar Display
Field type: Display (5-digit)
Indicator for a stable difference signal Ux. On manual calibration procedure all 5 digits must be
filled black, only then the measured values can be accepted.
Store
Field type: Button
This button is relevant only for the manual calibration process. If it is pressed during zero gas
measurement, the current measurement value is placed into the zero gas field. If it is pressed
during test gas measurement, the current measurement value is placed in the test gas field.
End
Field type: Button
When readings for zero gas and test gas measurement are displayed in the corresponding
fields, they can be validated by pressing the “End” button. If there are already inputs to the
calibration history, the operator will then be asked whether this is a first calibration. If it is a first
calibration, the existing inputs in the history will be deleted.
Cancel
Field type: Button
Pressing this button will cancel a calibration process at any time. The results up to that time will
be voided.
Back
Field type: Button
Pressing this button will close the menu
without affecting the calibration process.
Interface Tests
Test of the analogue outputs
This function is not yet available at present.
Calibration InterfaceTest Menu A
[Analog] [Serial] [Driver Output]
Output Number: ---
Output Value: ---- mA
[End]
Test of the serial interfaces
From a list of interfaces situated at the SUPREMA, an interface can be selected at the DIS-
PLAY + OPERATION UNIT. As soon as this interface has been selected, its usual function is
inhibited. Therefore, testing of serial interfaces can not be carried out via PC/laptop.
Every time the [Test] button is operated, a test text consisting of all printable characters of the
font is given to the interface. The text is introduced by the “Carriage-Return” character and
terminated by “Line-Feed”.