Baker Hughes Masoneilan 12400 Series, Инструкция по эксплуатации и руководство по безопасности

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® 2017 Baker Hughes, a GE company. All rights reserved. Masoneilan 12400 Series Transmitter/Controller Instruction Manual | 13
4. Installation
4.1. STORAGE AND CONDITION AT DELIVERY
Level instruments have been carefully packed in our premises to
prevent them from damage during handling and transportation.
Units must be stored in an area where temperatures are between
-50 °C and +93 °C.
Units are factory dry calibrated (simulation by weight) to the
service specific gravity specified by the customer.
When service specific gravity has not been specified, units are
factory dry calibrated to a specific gravity of 1.
Recalibration is recommended when the actual specific gravity
differs from calibration specific gravity.
Recalibration is needed when verification of instrument
performance is made with liquid in the displacer chamber.
4.2. MOUNTING ON SITE
Unpack the unit carefully and record the serial number for future
reference. Remove the shipping stud that secures the displacer in
the chamber.
Whenever possible, locate the instrument at some easily
accessible, well-lighted place on the vessel. The location must
have ambient temperature at the instrument case within the
range of -50 °C to +80 °C (unless limitations due to hazardous area
approvals – see Section 2).
Note: Do not remove instrument cover until the unit has been
installed and is ready for calibration.
The codes shown on numbering system indicate the instrument
designation as a function of various installation modes, displacer
chamber connections, and environmental standard or protection
of the case against explosion. Figures 3 and 6 show the various
ways of installing the displacer chamber.
4.2.1. E
XTERNAL MOUNTING
(Chamber Type Model, Figures 3 & 4)
Install the instrument in a vertical position on the side of the tank
or vessel, so that the mid-range mark on the chamber is at normal
level. The mid-range is marked on the chamber.
The equalizing lines between chamber and vessel must be the
same size as the chamber connections. Install a block valve in
each line.
The use of a drain connection is recommended as shown in Figure
3.
CAUTION:
The displacer is always immobilized in the displacer chamber to
avoid any internal damage during transportation. During the level
installation, the displacer has to be unlocked by unscrewing the M6
stern at the drain.
Type 1240 5 (Screwed NPT, BW, SW) Type 1240 6 (Screwed NPT, BW, SW)
Type 1240 8 (Flanged) Type 1240 7 (Flanged)
Figure 4
Type 1240 0 (Screwed NPT, BW, SW) Type 1240 9 (Screwed NPT, BW, SW)
Type 1240 1 (Flanged) Type 1240 2 (Flanged)
MID
RANGE
MID
RANGE
MID
RANGE
MID
RANGE