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2 instructions for installation – VEGA VEGAPULS 63 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART - two-wire User Manual

Page 14

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4

.2 Instructions for installation

T

he flange screws of VEGAPULS 63 must be always screwed with the

torque stated in the technical data so that the PTFE washer of the
encapsulated antenna system seals.

Y

ou can counteract the material-induced tension loss with PTFE by

doing the following:

1

M

ake sure the number of flange screws corresponds to the

number of flange holes

2

U

se disc springs in addition to the flange screws for fastening the

ange

3

T

ighten the screws steadily with the torque specified in the

technical data

W

hen mounting the VEGAPULS 63, keep a distance of at least

200

mm (7.874 in) to the vessel wall. If the sensor is installed in the

center of dished or round vessel tops, multiple echoes can arise.
T

hese can, however, be suppressed by an appropriate adjustment

(

see chapter "Setup").

I

f you cannot keep this distance you should carry out a false echo

storage before setup. This applies mainly if buildup on the vessel wall
is expected. In this case, we recommend repeating a false echo
storage later with existing buildup.

> 200 mm

(7.87")

Fig. 5: Mounting on round vessel tops

1

Reference plane

2

Vessel center or symmetry axis

I

n vessels with conical bottom it can be advantageous to mount the

sensor in the center of the vessel, as measurement is then possible
down to the lowest point of the vessel bottom.

Mounting of instruments
with PTFE-coated flan-
ges

Mounting position

14

VEGAPULS

63 • 4 … 20

mA/HART - two-wire

4 M

ounting

28436

-EN

-120530