Emerson CMF200A installation manual Rupture Disks, Time required to purge Elite sensor cases

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Rupture Disks

Table 5 Time required to purge ELITE sensor cases

 

Purge rate

Time(1)

Sensor model

ft3/hr (l/hr)

minutes

 

 

 

CMF010

20 (566)

1

CMF025

20 (566)

1

CMF050

20 (566)

2

CMF100

20 (566)

5

CMF200

20 (566)

12

CMF300

20 (566)

30

CMF400

20 (566)

55

 

 

 

(1) If purge lines are being used, increase purge time to fill the additional volume.

Rupture Disks

If the sensor has rupture disks, they are installed in the sensor purge fitting openings. The rupture disks should remain installed at all times. If you remove a rupture disk from the sensor case, it will be necessary to re-purge the case (see Case purging procedure on page 21).

Rupture disks are meant to vent process fluid from the sensor case in the event of a flow tube rupture. Some users connect a pipeline to the rupture disk to help contain escaping process fluid.

Stay clear of the rupture disk pressure relief area. High-pressure fluid escaping from the sensor can cause severe injury or death.

If a rupture disk is removed, the instructions for repurging the case provided under Case purging procedure on page 21 must be followed. Improperly pressurizing the sensor case can result in serious injury.

For more information about rupture disks, contact Micro Motion Customer Service.

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Micro Motion® ELITE® Sensors

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Contents Micro Motion Elite Sensors Page Customer service TroubleshootingBefore You Begin Specifications Definitions European installationsInstallation options CMF025, CMF050, or CMF100 Elite sensor with core processor Elite sensor with junction box Hazardous area installations Determining a LocationFull flow tubes Environmental limits113 UL and CSA ambient temperature limits Sensor models ElectronicsMaximum wiring distances Maximum cable lengthsPipe run ValvesOrienting the Sensor Recommended sensor orientationsFlow direction arrow Vertical pipelineMounting the Sensor Mounting an Elite sensorInstalling extended mount electronics Feedthrough, plastic cap, and clamping ringMounting the temperature extender onto the sensor Installing wafer-style sensors Wafer-style assembly Wiring Core processor to a 4-wire remote transmitterWrapping the shield drain wires Applying the heat shrink Connecting the wires at the core processor Grounding Pressure RatingsElite pressure ratings Case purging procedure Purge FittingsRemoving a purge plug Rupture Disks Time required to purge Elite sensor casesReturn Policy New and unused equipmentUsed equipment 20002158
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