Thermo Scientific MIRAN 205B Series Instruction Manual page 194

MIRAN SapphIRE Field Performance Verification Kit
3. Slowly squeeze the trigger. When the trigger is fully depressed, insert the
trigger holder as shown in Figure E-3. This holder keeps the gas tank valve
open while the test proceeds. Once the gas sampling accessory is installed, lay
the complete assembly down with no further intervention. Watch the gas
readings climb.
Caution: If, during this operation, the small capillary tubing is ejected from the nozzle,
remove the trigger holder to shut off gas flow. Then reinsert the tubing, making sure to
slide the tubing in far enough. It should remain in place even if slight rearward tugs are
applied to it. Always firmly grasp a portion of the capillary tubing as it is removed.
4. The displayed gas readings should first rise and then, after approximately 3-4
minutes, level off and stabilize. Note these readings.
Disconnecting the Sampling Accessory
After the readings have stabilized and have been recorded:
1. Remove the trigger holder from the gas tank. This normally shuts off the flow
of any gas remaining in the tank, but a slight upward nudge on the trigger
itself ensures that the tank valve is fully closed.
2. Remove the tubing sleeve from the INLET port and reattach the zero filter.
3. Restart the pump by selecting Option 2 from the CONTROL menu; the
concentration readings should now begin to drop. Continue until the readings
have returned to substantially zero. At this point, the analysis may be
terminated to stop logging. Remember to upload the file for subsequent
analysis.
4. Remove the capillary tubing end from the tank trigger nozzle and return the
sampling accessory to its storage bag. Observe the caution note above when
removing the capillary tubing.
Figure E-3. Inserting the Trigger Holder
E-4