STATUS SCIENTIFIC CONTROLS
Installation, Commissioning & Routine Gas Testing
FGD10A-M Gas Detector
TD18/032
Issue:
10
Change Note:
1869
Page 29
9.1.3. Sensor Span
The following description applies to Pellistor, Toxic, Oxygen, IR Methane and
IR propane gases. For other IR flammable gases e.g. propylene, see below.
Always zero the sensor prior to performing a span operation, even if the
display shows zero. IR sensors will not accept Span values less than 10% of
FSD.
•
Apply a known concentration of gas (applicable to sensor type)
at a flow rate of between 500 and 1000cc/min. Allow time for
the sensor to respond.
•
From the menu system select menu option:
Sensor Span
and
press ENTER.
Gas Level
Edit
+
.
•
Use the
button to select an individual digit then use the
button to change the digit to 0 through 9, continue for all digits
until the desired gas level is set.
•
Press ENTER to accept the new gas level will be
displayed to confirm the new gas level.
•
Press the MENU button to exit the gas editing menu. The
display shows
Calibration
Span Sensor
•
Press ENTER to span the sensor, will be displayed
to confirm the sensor span has been performed.
Note: pressing MENU rather than ENTER exits the span
feature without performing the calibration.
Wait until the reading is stable, if necessary press ENTER
again to span the sensor.
•
Press MENU to close the menu system.
•
Turn off and disconnect the calibration gas.
Updated
Updated
