Instruction Manual
D102005X012
846 Transducer
June 2017
10
Supply Pressure
WARNING
Severe personal injury or property damage may occur from process instability if the instrument supply medium is not
clean, dry air. While use and regular maintenance of a filter that removes particles larger than 40 micrometers in diameter
will suffice in most applications, check with an Emerson Automation Solutions field office and industry instrument air
quality standards if you are unsure about the proper amount or method of air filtration or filter maintenance.
The supply medium must be clean, dry air that meets the requirements of ISA Standard 7.0.01 or ISO 8573-1. An
output span of 0.2 to 1.0 bar (3 to 15 psi) requires a nominal supply pressure of 1.4 bar (20 psi) and a flow capacity not
less than 6.4 normal m
3
/hr (240 scfh).
For multirange performance units with higher output spans, the supply pressure should be at least 0.2 bar (3 psi)
greater than the maximum calibrated output pressure.
The air supply line can be connected to the 1/4‐18 NPT supply port, or to the supply port of a filter‐regulator mounted
directly to the transducer. Figures 5, 6, 7, and 8 show the installation options.
Figure 5. Typical Dimensions with Fisher 67CFR Filter/Regulator and Gauges
6
(0.25)
COVER
REMOVAL
CLEARANCE
MODULE
COVER
REMOVAL
CLEARANCE
FOR PROPER MOISTURE DRAINAGE
THIS END MUST BE UP
67
(2.62)
78
(3.08)
CENTERLINE
OF ACTUATOR
191
(7.51)
137
(5.38)
YOKE MOUNTED
NOTE:
1 THE MOUNTING POSITIONS SHOWN ALLOW ANY MOISTURE BUILDUP IN THE TERMINAL COMPARTMENT
TO DRAIN TO THE SIGNAL WIRE CONDUIT ENTRANCE. DO NOT MOUNT THE TRANSDUCER WITH THE TERMINAL
COMPARTMENT COVER ON THE BOTTOM; MOISTURE MAY ACCUMULATE IN THE TERMINAL COMPARTMENT
OR PILOT STAGE, PREVENTING PROPER TRANSDUCER OPERATION. THE VERTICAL MOUNT IS MOST EFFECTIVE
FOR MOISTURE DRAINAGE IN WET APPLICATIONS.
14B7361‐D
A6626-3
mm
(INCH)
13
(0.50)
156
(6.15)
1
215
(8.48)
FOR ATEX/IECEx
FLAMEPROOF UNITS:
BOLT ENGAGEMENT
NOT TO EXCEED
12.9 mm (0.51 INCHES).
5/16‐18 BOLTS
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