
ECA 450
Calibration
Instruction 0024-9400
51
3.3 Starting and Ending a Calibration Procedure
Start any calibration procedure by first pressing the
CALIBRATE
shortcut
key. Before calibration can begin, however, a 4-place alphanumerical
password must be entered. Enter the password by first pressing the
ENTER
key, and then using the
∧
∨
and < > keys until the correct password is
displayed.
Note:
The calibration password is provided on a separate card supplied with
the analyzer.
««««CALIBRATION«««««
« PASSWORD ----
Again press the
ENTER
key. If the correct password was entered, the
following Calibration List screen will appear.
Note:
Sensors that are not installed will not appear in the Calibration List.
««CALIBRATION LIST««
ª Pressure
T-Stack
T-Air
HC
CO-LO
SO2
NO
NO2
CO-HI
Use
∧∨
keys until cursor is in front of desired calibration function; then press
ENTER
to display that function’s corresponding Calibrate screen.
After the desired calibration procedures have been completed, press the
ESC
key to return to the Combustion Test HOLD screen.
3.4 Calibrate Pressure Sensor
This procedure calibrates the pressure sensor to a known pressure value.
Material Required:
• Calibration Pressure Fixture (Section 3.2)
• Bellows (adjustable)
• Micro manometer Range:
±8 in. H
2
O column (±20 mb)
Accuracy: ±0.01 H
2
O column (±0.025 mb)
Procedure:
1.
Enter Calibration List screen; then choose Pressure per Section 3.3 to
display the PRESSURE CALIBRATE screen.