AirSense
Model 310en Operator’s Manual
4. Remove the dust
cover from the
barbed calibration
nipple by grasping
its top with a pair of
needle-nose pliers
and pulling straight
back.
5. Attach a 1/8 “ ID
flexible tube to the
nipple and establish
a flow of between
50 and 100 cc/min
(0.002 to 0.004
SCFM) of 2000
ppm or or lower
concentration
calibration gas through the sensor. Allow approximately
two minutes for the reading to stabilize.
6. If the reading differs by less than ± 50 ppm from the
known concentration of the calibration gas, no adjustment
is recommended; proceed directly to step 9.
Figure 3:
Showing location of
calibration nipple
Otherwise
note whether the shorting block at jumper
JP5 is covering both pins or only a single pin
, then
borrow the shorting block and slide it over both pins of
jumper JP2 (see Figure 2 on page 5).
7. Use the 'UP' and 'DOWN' buttons (see Figure 2 on page
5) to adjust the reading.
8. When the reading agrees with the concentration of the
calibration gas, remove the shorting block on jumper JP2,
and replace in its original position at jumper JP5.
9. Turn off the calibration gas flow, disconnect the gas
tubing from the calibration nipple and replace its dust
cover. Remove the meter leads from the terminal strip
and replace the front cover (see procedure on page 7).
3/9/15
Digital Control Systems
Page:
12
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