Carrier 69NT40-489-100 Series, Руководство по эксплуатации и обслуживанию

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110 T-305
Table 25. Controlled Atmosphere Pre-Trip Test Codes -- Continued
CODE
NO.
TITLE DESCRIPTION
P4-0
Carbon Dioxide
Zero Calibration
This test will attempt a zero-point calibration of the carbon dioxide sensor using
the nitrogen stream, and will run for up to 10 minutes and 30 seconds.
Pass/Fail Criteria: Passes for a successful calibration. Fails otherwise.
P4-1
Oxygen Sensor
Zero Calibration
This test will attempt a zero-point calibration of the oxygen sensor using a
calibration gas, and will run for up to 12 minutes.
Pass/Fail Criteria:
Passes for a successful calibration. Fails otherwise.
NOTE
If test P4-1 fails, then recheck after test P6-0.
P4-2
Carbon Dioxide
Sensor Check
This test will check the span of the carbon dioxide sensor using a calibration
gas, and will run for up to eight minutes.
Pass/Fail Criteria: Passes for a successful check. Fails otherwise.
P5-0
System
Performance Tests
Requirements:
Valid oxygen sensor calibration values must be available.
(Zero-point and span.) The membrane temperature should be within 3
_
C of
setpoint. However, this test will not fail if this requirement is not met.
Setup: This test will check the nitrogen percentage from the membrane, and
will run for up to 10 minutes.
Pass/Fail Criteria: Passes for a successful check with a nitrogen range greater
than 97.5%. Fails otherwise.
P5-1
System
Performance Tests
Requirements: Valid oxygen sensor calibration values must be available.
(Zero-point and span.) The membrane temperature should be within 3
_
C of
setpoint. However, this test will not fail if this requirement is not met.
Setup: This test will check the nitrogen percentage from the membrane while
the nitrogen purity valve is energized, and will run for up to 10 minutes.
Pass/Fail Criteria: Passes, with P5-1 displayed, for a successful check as
defined by the following: N2 range between 88 and 97%. Fails otherwise.
P6-0
Carbon Dioxide
Zero Calibration
This test will attempt a zero-point calibration of the carbon dioxide sensor using
the nitrogen stream, and will run for up to 10 minutes and 30 seconds.
Pass/Fail Criteria:
Passes for a successful calibration. Fails otherwise.
P6-0 is the same as, but independent from P4-0, and is not run during the Auto
Mode of Pre-Trip.