Bacharach Portable Combustion Analyzer Spécifications télécharger pdf (Page 86)

PCA

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3 Manual

86 0024-9472 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 90)

7.6.2. Procedure

1. Follow the instructions on page 78 (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

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 99 100

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Bacharach Portable Combustion Analyzer Spécifications Page 86