MSA MultiGard 5000, Manual

Page: 43 / 132

35
3103-1001 Rev. 0
Figure 11: Manual Calibration Figure 12: Manual Calibration (Dual)
The Manual Calibration screen consists of the following:
"Sensor 1 Gas Level" through "Sensor 4 Gas Level" - The four large gas level displays, show the
real-time sensor gas readings
without any corrections . These values are raw sensor readings that
are continuously updated and will NOT match the sensor bar graphs when auto standardization is
enabled. The sensor bar graphs show the corrected sensor readings. If auto standardization is not
enabled, the gas level displays on the Manual Calibration screen
WILL match the sensor bar graphs.
"Select Gas:" - This is a three position selector switch which allows the selection of Zero, Span 1,
and Span 2 gases for application to the sensors. The selection may be done at any time and the actual
application occurs only when the “GO TO MANUAL CALIBRATION MODE” button is pressed,
starting the manual calibration mode.
"CURRENTLY SAMPLING" - This indicator advises the operator that he may enter the manual
calibration mode. When auto standardization is in progress the indicator shows "ASTD IN
PROGRESS" and the manual calibration is locked out until auto standardization is over.
“MANUAL CAL INACTIVE” – This normally green indicator alerts the operator as to what
calibration mode the system is in. When a manual calibration is active, the indicator will turn yellow
and display “MANUAL CAL ACTIVE”.
"Manual Time-out (MIN):" - This indicator shows the time that remains for manual calibration
before the manual calibration time-out occurs. It is MSA factory set to 30 minutes and begins
counting down when the manual calibration mode is entered. Upon time-out completion, a full Auto
standardization will be executed on systems where auto standardization has been factory enabled.
Once the auto standardization is complete, the system resumes gas sampling. On systems where auto
standardization is not enabled, the unit resumes sampling.
"GO TO MANUAL CALIBRATION MODE" - This is the push button used to go to manual
calibration. When pushed the system starts the manual calibration mode and the button indicates
"RETURN TO SAMPLE MODE". Once done with manual calibration, pressing the “RETURN TO
SAMPLE MODE” button will end the manual calibration mode. The same auto standardization
rules apply as if the system were to time-out as discussed previously.