Siemens SITRANS 7ME3500, Руководство по эксплуатации, Страница: 71 / 296

Connecting
5.5 Sensor Installation
FUE1010 IP65 NEMA 4X
Operating Instructions, 12/2014, A5E03086491-AC
69
15.Temporarily position the frame (in the 3 o’clock position opposite the mounted frame - see
below) where it will be mounted. Ensure that this is a smooth area without any raised
spots (seams, etc.). Mark a generous area of 13 mm (1/2-inch) all around the mounting
frames with a pencil or chalk. Remove the frame and the Mylar guide.
①
9 o'clock Sensor
②
3 o'clock Sensor
Figure 5-19 Aligning the Sensors for Direct Mode operation (End View)
16.Prepare the area you marked by de-greasing the surface, if needed, and removing any
grit, corrosion, rust, loose paint or surface irregularities with the abrasive pipe
conditioning material provided. Clean the pipe of any debris and abrasive particles.
17.Replace the Mylar guide back in the same position it was in and retape it to the pipe
18.Put a mounting strap around the pipe and engage an end into adjusting screw (screw
should be pointing up).
19.Position frame in the middle of area you have cleaned and centered on the pipe with its
angled end facing away from where the other frame will sit and aligned with the edge and
center marks on the guide. Slide the mounting strap over it (and under the clip if there is
one) and tighten with a screwdriver. While tightening, check to ensure that the center of
the tapered roller is centered on the pipe.
20.Take either sensor and apply a continuous lengthwise 3 mm (1/8-inch) bead of coupling
compound across the center of the sensor emitting surface.
21.Tighten the sensor clamping screws to hold the sensor firmly in place.
Repeat procedure
for the other sensor.
22.Slide sensor into a mounting frame back end first aligning the angled edge of the sensor
with the angled edge of the mounting frame. Keep sensor from making contact with the
pipe until it butts up against the mounting frame stop. Push sensor down to mate with
pipe.
23.Open the transmitter top cover. Using a flat blade screwdriver, remove the Cable Strain
Relief bracket.
24.Observing the upstream and downstream orientation, attach the UP (upstream) and DN
(downstream) cables to the sensors and make snug. Attach the other ends to the UP and
DN terminals of the transmitter.
25.Replace the Cable Strain Relief bracket. Close top cover.
26.Proceed to Commissioning (Page 87).