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4194A, B, and C Series
Available Configurations
See table 1-2
Input Signal(Differential Pressure Sensing Ele-
(1)
ment Range)
Lower and Upper Range Limits: As shown in
table 1-3
Maximum Allowable Pressure: As shown in table
1-3
Output Signal
Proportional-Only, Proportional-Plus-Reset, or
Proportional-Plus-Reset-Plus-Rate Range: 3 to
15 psig (0.2 to 1.0 bar) or 6 to 30 psig (0.4 to 2.0
bar)
Action: Field-reversible between direct (increasing
differential pressure increases output pressure) or
reverse (increasing differential pressure decreases
output pressure)
Process Scale
Standard scale is matched to the range of the differ-
ential pressure sensing element. Linear, square
(2)
root, and optional
scales available
Process Connections
Standard: 1/4 inch NPT female stainless steel (all
input ranges); also available, steel or stainless steel
reducing adapters that permit 1/2 inch male or fe-
male connections
Optional: 1/2 inch NPT male stainless steel
Supply and Output Connections
1/4 inch NPT female
Supply Pressure Requirements
See table 1-4
Remote Set Point Pressures
3 to 15 psig (0.2 to 1.0 bar) or 6 to 30 psig (0.4 to
2.0 bar)
Controller Adjustments
(1)
Proportional Band
range
(1)
Reset
: Adjustable from 0.01 to more than 74 min
per repeat (from 100 to less than 0.0135 repeats
per min)
1. These terms are defined in ISA Standard S51.1-1979
2. Consult your Fisher Controls sales office or sales representative for additional
information
1–4
Table 1-1. Specifications
: 5 to 500% of process scale
(1)
Rate
: Adjustable from 0 to 20 minutes
Set Point: Adjustable from 0 to 100% of the scale
range
Controller Performance
(1)
Repeatability
: 0.4% of output span
(1)
Dead Band
: Less than 0.5% of process scale
span
Typical Frequency Response
deg phase shift with 10 ft (3.05 m) of 1/4 inch (6.4
mm) tubing and 100 cubic inch (1639 cm
Steady-State Air Consumption
Without Auto/Manual Station
3 to 15 Psig (0.2 to 1.0 Bar) Output: 3.5 scfh (0.1
3
m
/hr)
6 to 30 Psig (0.4 to 2.0 Bar) Output: 2.0 scfh (0.14
3
m
/hr)
With Auto/Manual Station (suffix letter E)
3 to 15 Psig (0.2 to 1.0 Bar) Output: 10.0 scfh (0.28
3
m
/hr)
6 to 30 Psig (0.4 to 2.0 Bar) Output: 10.0 scfh (0.28
3
m
/hr)
(3)
Delivery Capacity
3 to 15 Psig (0.2 to 1.0 Bar) Output: 240 scfh (5.6
3
m
/hr)
6 to 30 Psig (0.4 to 2.0 Bar) Output: 350 scfh (9.9
3
m
/hr)
(3)
Exhaust Capacity
3 to 15 Psig (0.2 to 1.0 Bar) Output: 186 scfh (4.6
3
m
/hr)
6 to 30 Psig (0.4 to 2.0 Bar) Output: 295 scfh (7.0
3
m
/hr)
Operative Ambient Temperature Limits
–40 to 160 F (–40 to 70 C)
Housing
Designed to NEMA 3 (Weatherproof) and IEC 529
IP54 specifications
Mounting
Controller can be mounted on actuator, panel,
wall, or pipestand
Approximate Weight
10 lb (4.5 kg)
3. Scfh—Standard cubic feet per hour (60 F and 14.7 psia). Normal m
meters per hour (0 C and 1.01325 bar, absolute).
(1)
: 1.5 Hz and 90
3
) volume
(1,3)
(1)
3
/hr—Normal cubic
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