Bacharach Flue-Gas Sample Conditioning System Dokumentacja Pobierz pdf (Strona 64)

Calibration ECA 450

60 Instruction 0024-9400

3.12 Calibrate CO-HI Sensor

This procedure spans the optional Carbon Monoxide High sensor (4,000 –

80,000 ppm CO) to a known gas level.

Material Required:

• Calibration Gas Fixture (Section 3.2)

• Gas Cylinder: 4,000 ppm CO in air (refer to Section 6.2)

Procedure:

1. Enter Calibration List screen; then choose CO-HI per Section 3.3 to

display the CALIBRATE CO-HI screen. At the conclusion of this step the

pump should be running.

2. Using the Gas Fixture shown in Figure 3-1, attach a CO calibration gas

cylinder to the analyzer’s GAS inlet port.

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 250 to 11,000 ppm. An applied value that is

outside this range will cause the message “Bad Calibration Entry” to

appear.

Typical Calibrate CO-HI Screen During Calibration:

«««CALIBRATE CO-HI««

Measured 3890 ppm

Applied 04000 ppm

5. Press ENTER to calibrate the analyzer’s Measured value to that of the

Applied value; after which the message “Good Calibration” should appear

along with the Calibration List screen being redisplayed.

If the message “Sensor Output Low” or “Sensor Not Calibrated” appears,

refer Section “5.4 Troubleshooting Guide.”

6. Turn off regulator; then remove gas cylinder from calibration fixture.

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Bacharach Flue-Gas Sample Conditioning System Dokumentacja Strona 64