Emerson Fisher 4194HA, Instruction Manual

Page: 5 / 92

Instruction Manual
D200156X012
4194HA, HB, HC Controllers
July 2018
5
Table 1‐1. Specifications
Available Configurations
See table 1‐2
Input Signal (Differential Pressure Sensing Element
Range)
Differential Pressure Range: See table 1‐3
Maximum Safe Working Pressure: See table 1‐3
Output Signal
Proportional‐Only, Proportional‐Plus‐Reset, or
Proportional‐Plus‐Reset‐Plus‐Rate Range:
0.2 to 1.0
bar (3 to 15 psig) or 0.4 to 2.0 bar (6 to 30 psig)
Action: Field‐reversible between direct
(1)
(increasing
differential pressure increases output pressure) or
reverse
(1)
(increasing differential pressure decreases
output pressure)
Process Scale
Standard scale is matched to the range of the
differential pressure sensing element. Linear, square
root, and optional scales
(2)
available
Process Connections (To Differential Pressure Unit)
Standard: 1/4 NPT internal stainless steel
(all input ranges)
Optional: 1/2 NPT internal stainless steel
Supply And Output Connections
1/4 NPT internal
Supply Pressure Requirements
See table 1‐4
Supply Pressure Medium
Air or Natural Gas
Supply medium must be clean, dry and non-corrosive
Per ISA Standard 7.0.01
A maximum 40 micrometer particle size in the air
system is acceptable. Further filtration down to 5
micrometer particle size is recommended. Lubricant
content is not to exceed 1 ppm weight (w/w) or
volume (v/v) basis. Condensation in the air supply
should be minimized.
Per ISO 8573-1
Maximum particle density size: Class 7
Oil content: Class 3
Pressure Dew Point: Class 3 or at least 10
_
C less than
the lowest ambient temperature expected
Remote Set Point Pressure Ranges
0.2 to 1.0 bar (3 to 15 psig) or
0.4 to 2.0 bar (6 to 30 psig)
Controller Adjustments
Proportional Band: 5 to 500% of process scale range
Reset: Adjustable from 0.01 to more than 74 minutes
per repeat (from 100 to less than 0.0135 repeats per
minute)
Rate: Adjustable from 0 to 20 minutes
Set Point: Continuously adjustable from 0 to 100% of
the scale range
Controller Performance
Repeatability: 0.4% of output span
Dead Band: Less than 0.2% of process scale range
Steady‐State Air Consumption
(3)
Without Auto/Manual Station
0.2 to 1.0 Bar (3 to 15 Psig) Output:
0.08 m
3
/hr (2.8 scfh)
0.4 to 2.0 Bar (6 to 30 Psig) Output:
0.07 m
3
/hr (2.5 scfh)
With Auto/Manual Station (suffix letter E)
Add 0.01 m
3
/hr (0.5 scfh)
Operative Ambient Temperature Limits
(4)
–40 to 70
°
C (–40 to 160
°
F)
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