Reference Gas Monitoring - Siemens 7MB3000 Series Operating Instructions Manual

Wall-mounted device

Table of Contents

4.4.4

Reference gas monitoring

NOTICE

Damage to the microflow sensor

The microflow sensors can be damaged by aggressive sample gas components. As long as the

reference gas is flowing, the sample gas is prevented from diffusing to the microflow sensors

and destroying them.

• Ensure that the microflow sensors have no contact to the sample gas. To do this, monitor

• Ensure that there is a continuous supply of reference gas during operation.

• Interrupt the sample gas supply if the reference gas pressure is too low, and flush the sample

Note

Sample gas pressure increase influences the sample gas pressure switch

At the time of delivery of an OXYMAT 7 analyzer module, the internal pressure switch for

reference gas monitoring is preset to approx. 2000 hPa (3000 hPa abs.). Changes in the sample

gas pressure in the analyzer module by more than 150 hPa require a change in the pressure

switch switching point by the same amount. The monitoring functionality of the reference gas

pressure switch is modified as a result.

• For changes to the sample gas pressure, contact the Service.

• Have the pressure switching point of the reference gas pressure switch adjusted by a Siemens

technician or someone trained for this case.