
Instruction 24-9448 5-3
Calibration
Section 3.8. In the following procedure inwc is
selected, but note that any unit-of-measure can
be used for calibration purposes.
1. Assemble the pressure sensor calibration
equipment as shown in Figure 5-1, but DO
NOT connect the analyzer to the calibration
equipment at this time.
2. If not already done, turn ON the analyzer and
display the CALIBRATION LIST screen per
Section 5.2.
3. Use the buttons to highlight Pressure,
and then press ENT to display the
CALIBRATE PRESSURE screen.
“Measured” is the pressure value currently
being detected by the pressure sensor, while
“Applied” is a known value of pressure that
will be applied for calibration purposes.
4. With both the –∆P and +∆P ports open to the
atmosphere, observe that the current Measured pressure reading should
be 0 ±0.01 inwc. If necessary, zero the pressure sensor per Section 4.6, and
repeating Steps 2 thru 4.
5. Connect the hose from the manometer to the +∆P port and apply a
negative pressure to this port by adjusting the bellows for a manom-
eter reading of –4.00.
6. Use the and buttons to enter an Applied value that exactly
equals the manometer reading.
Figure 5-1. Pressure Sensor Calibration Equipment
POWER
P
T-STACK T-AIR
GAS
4
3
2
1
0
-1
-2
-3
-4
Parts:
1. 3/16" I.D. Tubing
2. Tee
3. Barbed Hose Connector
4. Bellows
5. Manometer
1
2
3
4
5
CALIBRATION MENU
Pressure
T-Stack
T-Air
CO-LO
SO2
NO
NO2
(more)
MENU
F1 F2 F3
CALIBRATE PRESSURE
Measured 0.00 inwc
Applied -4.00 inwc
Press ENT
to calibrate
06/27/06 11:55:30 PM
PRINT
F1 F2 F3
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