Vaisala DMP248 Service Manual download pdf (Page 26)

OPERATING MANUAL_______________________________________________________________

20 _____________________________________________________________________ U263EN-1.4

Optional installation by means of the sampling system

DSS10

When the operating environment is not suitable for direct installation

of the measurement probe, an alternate solution could possibly be

found with the complete sampling system DSS10.

The sample system allows for greater measurement accuracy and

stability by controlling the temperature, pressure and filtration levels

to optimize the performance of the sensor. The sampling system is

designed with cooling coils to reduce temperatures above 80 °C and

filters to remove particulate down to 0.01 micron of size. The system

is also provided with valves, flow meters, pressure gauges and

vacuum pumps to control flow rates and pressure levels.

Sample system is easy to install, operate and virtually maintenance

free. It comes mounted on a steel plate to be fixed to the wall. Connect

tubing from the process tap to the sample system to allow a sample of

process gas to travel. Connect a power supply to the DMP248

transmitter and possibly to the vacuum pump. The system is now

ready to operate. Turn the power on and adjust the values to achieve

the desired gas flow rates and pressure levels. Note that these

adjustments need to be done just once. As for maintenance, check the

filter elements periodically. The interval depends on the application.

FIGURE 3-17 Sample system DSS10Electrical connections

1. DMP248 transmitter

2. inlet valve

3. bracket

4. cooling coil

5. filter

6. sample cell

7. DMP248 probe

8. venting valve

9. pressure gauge

10. needle valve

11. flow meter

12. pump

13. power cord

connection

10.

11.

12.

13.

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Vaisala DMP248 Service Manual Page 26