PCA
3 Manual
90
0024-9473 Rev 3
7.6. Nitric Oxide (NO) Sensor Battery Replacement
A single lithium battery, located on the NO Smart Sensor assembly, applies a
bias voltage to the NO sensor to prevent the sensor from destabilizing when the
analyzer is turned off. The NO bias battery is expected to last at least the life of
the NO sensor.
NOTE:
It is recommended that the bias battery be replaced
whenever the NO sensor is replaced.
7.6.1. Material Required
•
Bias battery (refer to Replacement Parts on page 94)
7.6.2. Procedure
1. Follow the instructions on page 82 (PCA
®
3 Disassembly) to remove the
sensor assembly from sensor position 4.
2. Remove the old battery from its holder on the nitric oxide printed circuit
board.
3. Insert the new battery with the positive side toward the sensor (the
battery contact is stamped with a + symbol).
4. Re-install the Smart Sensor assembly.
5. Before powering up and using the analyzer, allow the nitric oxide sensor
to stabilize as described below. Note that recalibration of the nitric oxide
sensor is not required after replacing its bias battery.
Depending on how long the nitric oxide sensor was without bias voltage,
the time required for the sensor to completely stabilize varies from less
than a minute to several days. Typical stabilization times are shown
below. Generally, however, the sensor is sufficiently stable after 4 hours
for measurement purposes.
Bias Battery Stabilization Specifications for NO Sensor
Bias Battery Removed for...
Stabilization Time
Less than 15 minutes
Less than 1 minute
Less than 1 hour
Less than 5 minutes
Less than 2 days
Less than 4 hours
Greater than 2 days
Up to 2 days
Содержание PCA3
Страница 23: ...PCA 3 Manual 0024 9473 Rev 3 23 Figure 3 2 Connecting the Probe to the Analyzer...
Страница 64: ...PCA 3 Manual 64 0024 9473 Rev 3 Figure 5 23 Printer Alignment and Sample Printout...
Страница 84: ...PCA 3 Manual 84 0024 9473 Rev 3 Figure 7 2 Inside View with Rear Case Removed...
Страница 85: ...PCA 3 Manual 0024 9473 Rev 3 85 Figure 7 3 Tubing Connections Main Figure 7 4 Tubing Connections Sensors...
Страница 86: ...PCA 3 Manual 86 0024 9473 Rev 3 Figure 7 5 Wire Routing Connectors and Solder Connections...
Страница 96: ...PCA 3 Manual 96 0024 9473 Rev 3 Figure 8 3 Replacement Parts Main PCB Assembly Replacement Part Not Available...
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Страница 102: ...PCA 3 Manual 102 0024 9473 Rev 3...
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