Figure 2-10: Low Pressure Gas Sampling - Teledyne MD300 Operating/Service Instructions Manual

Portable Oxygen Monitor
From the low pressure inflator hose using the sample
adapter as shown in Figure 2-10.
Directly from the high pressure gas cylinder using the
optional DIN restrictor shown in Figure 2-11.
NOTE: Both sample modes require the use of the gas diverter
cap and tee adapter as show in Figure 2.3. Make sure you
have calibrated the unit before proceeding.
INFLATOR HOSE SAMPLING. Connect the inflator hose adapter
supplied with the unit to the tee adapter as shown in Figure 2.10. Open
the gas bottle valve and allow gas to flow for approximately 30 seconds.
When a stable reading is observed close the cylinder valve. Allow
reading to settle for a few seconds. This is the oxygen value of the
sample gas.

Figure 2-10: Low Pressure Gas Sampling

HIGH PRESSURE SAMPLING. To measure the oxygen concentration
directly from the high pressure cylinder. Install the optional DIN connector
onto the tank and insert the blue tee adapter and sensor as shown in Figure 2-
3. Slowly open the cylinder valve until you detect gas flowing. When a stable
reading is observed close the cylinder valve and allow the reading to settle for
a few seconds. This is the oxygen value of the sample gas.
CAUTION: MAKE SURE YOU DO NOT PRESSURIZE THE
SENSOR DURING CALIBRATION OR USE, AS THIS
WILL PRODUCE ERRORS IN THE READINGS.
Teledyne Analytical Instruments
Operation
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