Onicon F-5100 Insertion Manual de usuario descargar pdf (Pagina 15)

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F-5100 Insertion Thermal Mass Flow Meter Manual 05/15 - 0663-20 / 18333 Page 15

3.3 INSTALLING THE FLOW SENSOR

Begin by calculating the effort that will be required to hold the sensor. Establish adequate footing

for this task, taking extra care when working from a ladder or platform. Use the following

formula:

E=0.2 x P Where: E = effort in pounds

P = system pressure in pounds per square inch

Example: In a 50 PSI system, 10 pounds of force is required to insert the sensor into the pipe.

WARNING

SYSTEM MAY BE UNDER HIGH PRESSURE. When inserting, removing or adjusting the sensor

position, be sure to hold the enclosure rmly by hand before SLOWLY loosening the

compression tting. Failure to do this will allow the pressure to suddenly and rapidly force the

sensor from the pipe causing serious injury. The hand effort required to hold the sensor will be 0.2

times the pipe pressure.

WARNING

Remove all sources of ignition (i.e. open ame, welding equipment, a lit cigarette, etc.) from the

area prior to installing, removing or adjusting the ow sensor when working with combustible

gases.

3.3.1 Determining the Insertion Depth, Inserting the Sensor and Tightening the

Compression Fitting

WARNING

The following instructions assume that the pipe is pressurized. Whenever the ball valve is open;

a rm grip must be maintained on the sensor at all times until the insertion depth is set and the

compression tting is properly tightened.

WARNING

Do not attempt to insert the sensor into a pipe pressurized to greater than 200 PSIG. For pipes

pressurized above 200 PSIG isolate ow and relieve pressure in the pipe before attempting to

install the sensor.

The insertion depth is based on the inside diameter of the pipe into which the sensor is

installed. When the sensor is properly installed, the ow sensor is positioned in the center

of the pipe.

For sensors installed in pipes with a nominal diameter ≤ 6 inches, the reference point for

the insertion depth measurement is the inside wall of the pipe directly opposite from the

insertion point. For sensors installed in pipes with a nominal diameter > 6 inches, a depth

gage is provided. See Appendix A-2 for instructions on the use of the insertion depth gage.

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Onicon F-5100 Insertion Manual de usuario Pagina 15