Data Sheet

C1 Controllers and Transmitters
D103291X012
Product Bulletin
34.3:C1
July 2014
2
Specifications
Available Configurations
See table 1
Input Signal
Pressure
Type:
J Gauge pressure, J vacuum, J compound
pressure, or
J differential pressure of a liquid or gas
Limits: See table 2 or 3
Output Signal
Proportional or Proportional-Plus-Reset Controllers
and Transmitters:
J 0.2 to 1.0 bar (3 to 15 psig) or
J 0.4 to 2.0 bar (6 to 30 psig) pneumatic pressure
signal
Differential Gap Controllers:
J 0 and 1.4 bar
(0 and 20 psig) or
J 0 and 2.4 bar (0 and 35 psig)
pneumatic pressure signal
Action: Control action is field reversible between
J direct (increasing sensed pressure produces
increasing output signal) and
J reverse (increasing
sensed pressure produces decreasing output signal).
Supply Pressure Requirements
(1)
See table 4
Supply Pressure Medium
Air or natural gas
Air Quality: Supply pressure must be clean, dry air
that meets the requirements of 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
Natural Gas: Natural gas must be clean, dry, oil-free,
and noncorrosive. H
2
S content should not exceed 20
ppm.
Steady-State Air Consumption
(2)(3)
0.2 to 1.0 bar (3 to 15 psig): 0.08 normal m
3
/hour
(3 scfh)
0.4 to 2.0 bar (6 to 30 psig): 0.12 normal m
3
/hour
(4.5 scfh)
Supply and Output Connections
1/4 NPT internal
Supply and Output Pressure Gauge Ranges
See table 5
Proportional Band Adjustment
For Proportional-Only Controllers: Full output
pressure change adjustable from
J 2% to 100% of the
sensing element range for 0.2 to 1.0 bar (3 to 15 psig)
or
J 4% to 100% of the sensing element range for 0.4
to 2.0 bar (6 to 30 psig)
For Proportional-Plus-Reset Controllers: Full output
pressure change adjustable from
J 3% to 100% of the
sensing element range for 0.2 to 1.0 bar (3 to 15
psig), or
J 6% to 100% of the sensing element range
for 0.4 to 2.0 bar (6 to 30 psig)
Differential Gap Adjustment
For Differential Gap Controllers: Full output pressure
change adjustable from 15% to 100% of sensing
element range
Reset Adjustment
For Proportional-Plus-Reset Controllers: Adjustable
from 0.01 to 74 minutes per repeat (100 to 0.01
repeats per minute)
Zero Adjustment (Transmitters Only)
Continuously adjustable to position span of less than
100% anywhere within the sensing element range
Span Adjustment (Transmitters Only)
Full output pressure change adjustable from 6 to
100% of process sensing element range
Performance
Repeatability: 0.5% of sensing element range
Dead Band (Except Differential Gap Controllers
(4)
):
0.1% of sensing element range
Typical Frequency Response at 100% Proportional
Band:
Output to Actuator: 0.7 Hz and 110 degree phase shift
with 1850 cm
3
(113 inches
3
) volume actuator at
mid-stroke
Output to Positioner Bellows: 9 Hz and 130 degree
phase shift with 0.2 to 1.0 bar (3 to 15 psig) output to
33 cm
3
( 2 inches
3
) bellows
-continued-