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Minimum wire area (mm
2
per meter)Figure 1-3:
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.350
0.400
0.450
0.500
0.550
0.600
0.650
0.700
0.750
0.800
0.850
0.900
100 200 300 400 500 600 700 800 900 1000
Minimum Wire Area (mm
2
)
Distance of Installation (m)
Minimum Wire Area (mm
2
)
22.8V
24V
1.5 Installation requirements for the thermo-well
pocket
Installation of the GDM in a thermo-well pocket helps maintain temperature equilibrium
between the sample gas and pipeline gas. Micro Motion provides thermo-well pocket
installation kits for purchase. Contact your local sales representative or Micro Motion
Customer Support at flow.support@emerson.com for more information.
A thermo-well pocket installation requires the following, before you can mount and
connect the GDM:
1. Create an aperture in the pipeline to receive the pocket (see Figure 1-4 for the pocket
dimensions).
Important
Micro Motion recommends that you do not exceed more than a 10% reduction of the cross-
sectional area at the point of insertion to ensure minimal effect on pressure. Follow local
practices and guidelines for welding in hazardous areas, if applicable.
2. Install and weld the pocket in place. Be sure to follow local practices and guidelines
for welding in hazardous areas, if applicable.
Planning
Installation Manual 5