Ametek Land 4750-PM, Руководство пользователя

Страница: 22 / 64

User Guide 3 - 4
Particulate Measurement System 4750-PM
3.3.1 Sensor Checks
Manually triggered Zero and Span sensor checks ensure consistent data
quality and reliable performance. An automatic Air Purge Flow self-check is
available to continuously monitor the purge air flow to the sensor and trigger
an alarm if the purge air flow fails or is greatly reduced. The automatic
sensor self-check is standard on high-temperature sensor variants (see
below).
3.4 Purge Air Blower
The 4750-PM sensor requires purge air at all times during installation,
operation, and maintenance. AMETEK Land supplies the Medium Purge
Blower, which provides a continuous supply of purge air to the sensor (for
more information see page Section 2.2). A Purge Air Flow sensor is available
to monitor the constant, sufficient supply of purge air to the sensor. The
Purge Air Flow sensor is standard on high-temperature sensor variants (refer
to the Section 2.2.3 Sensor Options).