Mechanical Installation; Siting Requirements; Instruments; Dissolved Oxygen Flowcell - ABB 9438 User Manual

2 MECHANICAL INSTALLATION

2.1 Siting Requirements

2.1.1 Instruments – Fig. 2.1
Caution.
• Mount instruments in a location free from excessive
vibration.
• Mount away from harmful vapours and/or dripping fluids.
Information. It is preferable to mount the transmitter at eye
level thus allowing an unrestricted view of the front panel
displays and controls.
Maximum distance
Locate to suit
A – Maximum Distance of Instrument to Unit
–20 C
B – Within Temperature Limits
IP66
Liquid handling panel
IP65
C – Within Environmental Limits
Fig. 2.1 Siting Requirements – Instrument/Sensor
30 metres
55 C
Max.
Min.
IP54
Environmental cover
IP65
2.1.2 Dissolved Oxygen Flowcell – Fig 2.7
Allow sufficient clearance (200 mm all around) for easy removal
of the flowcell assembly for maintenance when not installed in
the optional enclosure – see Section 2.3.1 for overall dimensions
of units.
Note. To eliminate the risk of bubbles accumulating at the
sensor, and hence giving erroneous readings, the flowcell
assembly must be mounted vertically.

2.2 Mounting the Instrument

2.2.1 Wall-mounted Instrument – Figs 2.2 to 2.4
Dimensions in mm (in)
Three holes Ø6.3
suitable for M6
fasteners
160 (6.3)
232
(9.13)
69 (2.72)
Fixing Centers
Fig. 2.2 Overall Dimensions
Fix instrument to wall using
3
Fig. 2.3 Wall Mounting
42
(1.65)
68
(2.68)
214
250
(8.43)
(9.84)
Allowance for
Cable Bends
61 (2 3 / 8 ) o.d.
200 (7.9)
Vertical Post
Drill suitable
2
holes
1
Mark fixing centers
(see Fig. 2.3)
suitable fixings
3