
Calibration
ECA 450
56
Instruction 0024-9400
3.
Adjust regulator of calibration fixture for a flow meter indication of
approximately 2 SCFH.
4.
Wait until Measured reading on screen stabilizes (approximately
3 minutes). Then use the
∧∨
and < > keys to enter an Applied value that
equals the concentration stamped on the CO gas cylinder.
The calibration range is from 10 to 1500 ppm. An applied value that is
outside this range will cause the message “Bad Calibration Entry” to appear.
Typical Calibrate CO-LO Screen During Calibration:
«««CALIBRATE CO-LO««
Measured 493 ppm
Applied 00500 ppm
5.
Press
ENTER
to calibrate the analyzer’s Measured value to that of the
Applied value; after which the Test Gas CO/H2 screen is displayed.
6.
Turn off regulator on CO calibration gas cylinder; then remove gas
cylinder from calibration fixture.
7.
Attach a combination CO and H
2
calibration gas cylinder to calibration
fixture.
8.
Use the
∧∨
and < > keys to enter a CO value that equals the CO
concentration stamped on the gas cylinder. Then press
ENTER
to display
the Calibrate H2 screen.
Typical Testgas CO/H2 Screen During Calibration:
«««TESTGAS CO/H2««««
--------------------
CO value 1000
Enter CO value
9.
Adjust regulator of calibration fixture for a flow meter indication of
approximately 2 SCFH.
10.
Wait until Measured reading on screen stabilizes (approximately
3 minutes). Then use the
∧∨
and < > keys to enter an Applied value that
equals the H
2
concentration stamped on the gas cylinder.
The calibration range is from 400 to 1500 ppm. An applied value that is
outside this range will cause the message “Bad Calibration Entry” to
appear.
Typical Calibrate H2 Screen During Calibration:
««««CALIBRATE H2««««
Measured 985 ppm
Applied 01000 ppm