Emerson Fisher C1 Data Sheet

C1 Controllers and Transmitters

D103291X012

Fisherr C1 Pneumatic Controllers and Transmitters

Fisher C1 controllers and transmitters continue the tradition of durable and dependable Fisher pressure instrumentation while addressing air/gas consumption concerns. The C1 is used wherever durable and dependable pressure instrumentation is required. The use of this product in demanding applications, such as those found in chemical process, gas, and oil production industries, demonstrates its versatility. The C1 can reduce steady-state air/gas consumption to as little as 1/10th that of previous products.

C1 controllers compare sensed process pressure (or differential pressure) with an operator-adjusted set point, and send a pneumatic signal to an adjacent control element that maintains the process pressure at or near the set point value. C1 transmitters sense process variables and send out a pneumatic signal, usually to an indicating or recording device that directly indicates the process measurement.

Product Bulletin

34.3:C1

July 2014

Unless otherwise noted, all NACE references are to NACE MR0175 / ISO15156 & NACE MR0103.

Features

n Wide Range of Sensing Elements—A Bourdon tube is

available for high pressures or bellows for vacuum and low pressures. Either kind of sensing element can be installed in the case with the controller or transmitter. Two interchangeable ranges of output bellows and gauges also are available.

n Reduced Air/Gas Consumption—The C1 pneumatic

controller is an energy efficient choice, helping to improve profits and uptime. Steady-state consumption rate is less than the 6 scfh requirement set for the oil and gas industry by the US Environmental Protection Agency (New Source Performance Standards Subpart OOOO, EPA‐HQ‐QAR‐2010-0505).

FISHER C1 PNEUMATIC CONTROLLER

YOKE-MOUNTED ON CONTROL VALVE ACTUATOR

n Sour Service Capability—Materials are available for

applications handling sour process fluids. These constructions comply with the metallurgical requirements of NACE MR0175 / ISO15156 & NACE MR0103. Environmental restrictions may apply.

n Mounting Versatility—Install the case on a panel,

wall or pipestand, as well as directly on the control valve actuator.

n Reduced Maintenance Costs—A spring-out cleaning

wire, shown in figure 4, provides for in-service cleaning of the relay orifice.

n Proportional-Only, Proportional-Plus-Reset, and

Differential Gap Configurable—The C1 controller

can be configured to provide various modes of control.

(Features continued on page 3)

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Product Bulletin

34.3:C1 July 2014

Specifications

C1 Controllers and Transmitters

D103291X012

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 0.4 to 2.0 bar (6 to 30 psig) pneumatic pressure

J 0.2 to 1.0 bar (3 to 15 psig) or

signal

Differential Gap Controllers:

(0 and 20 psig) or

J 0 and 2.4 bar (0 and 35 psig)

J 0 and 1.4 bar

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

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 m3/hour (3 scfh)

0.4 to 2.0 bar (6 to 30 psig): 0.12 normal m

/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

(113 inches3) 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

( 2 inches3 ) bellows

-continued-

C1 Controllers and Transmitters

D103291X012

Specifications (continued)

Ambient Operating Temperature Limits

Standard Construction: -40 to 71_C (-40 to 160_F)

J High Temperature Construction: -18 to 104_C

(1)

(0 to 220_F)

Anti-reset windup (differential pressure relief) and process pressure gauge options are only available in the standard construction

Typical Ambient Temperature Operating Influence

Proportional Control only: ±3.0% of output span for each 28_C (50_F) change in temperature between

-40 and 71_C (-40 and 160_F) for a controller set at 100% proportional band Reset Control only: ±2.0% of output span for each 28_C (50_F) change in temperature between -40 and 71_C (-40 and 160_F) for a controller set at 100% proportional band Transmitters only: ±3.0% of output span for each 28_C (50_F) change in temperature between -40 and 71_C (-40 and 160_F) for a transmitter set at 100% span

NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology.

1. The pressure and temperature limits in this document, and any applicable standard or code limitation should not be exceeded.

2. Normal m

3. To convert from air flow rate to natural gas flow rate multiply by 1.29.

4. An adjustable differential gap (differential gap controllers) is equivalent to an adjustable deadband.

/hr: normal cubic meters per hour (m3/hr, 0_C and 1.01325 bar, absolute). Scfh: standard cubic feet per hour (ft3/hr, 60_F and 14.7 psig).

Housing

Designed to NEMA 3 (Weatherproof) and IEC 529 IP54 Specifications

Hazardous Area Classification

Complies with the requirements of ATEX Group II Category 2 Gas and Dust

Construction Materials

See tables 2, 3, and 6

Approximate Weight

8.2 kg (18 pounds)

Product Bulletin

34.3:C1

July 2014

Table 1. Available Configurations

AVAILABLE CONFIGURATIONS

DESCRIPTION

Proportional controller

Proportional-plus-reset controller

Differential-gap controller - - Transmitter C1D

1. See figure 4 and 5 for construction details.

Features (continued)

(1)

Without anti-reset windup With anti-reset windup - - -

Bourdon Tube Sensing Element

(Gauge Pressure Only)

C1P C1B

n Easy, More Accurate Adjustments—Make pressure

set point, proportional band, and reset changes

Pressure

Bellows Sensing Element

Gauge Pressure Differential Pressure

with simple dial-knob controls that help to assure

n Field Reversible—Switch action from direct to

positive settings. reverse or vice versa without additional parts. As illustrated in figure 3, transfer the reversing block to the opposite side of the flapper, invert the proportional band assembly and change the feedback bellows tubing connections.

n Sensitive Response—Area ratio of large relay

diaphragm to small relay diaphragm permits small

nozzle pressure changes to induce much greater

output pressure changes.

C1D

Product Bulletin

34.3:C1 July 2014

C1 Controllers and Transmitters

D103291X012

Table 2. Bourdon Tube Pressure Ranges and Materials

PRESSURE RANGES

(1)

MAXIMUM ALLOWABLE STATIC PRESSURE LIMITS

Standard With Optional Travel Stop

Bar Psig Bar Psig Bar Psig

0 to 2.0 0 to 4.0 0 to 7.0

0 to 14 0 to 20 0 to 40 0 to 70

0 to 100 0 to 200 0 to 350

0 to 550 0 to 700

1. Range marked on Bourdon tube may be in kPa (1 bar = 100 kPa).

2. Bourdon tube may be pressured to limit shown without permanent zero shift.

3. With travel stop set at 110% of the range.

4. Bourdon tubes are also available in NACE compliant material. Contact your Emerson Process Management sales office for additional information.

0 to 30 0 to 60 0 to 100

0 to 200 0 to 300 0 to 600 0 to 1000

0 to 1500 0 to 3000 0 to 5000

0 to 8000 0 to 10,000

2.0

4.0

7.0

14 20 40 70

100 200 350

550 700

30 60

100

200 300 600

1000 1500

3000 5000

8000

10,000

3.3

6.6 11

19 29 50 83

115 230 380

550 700

(2)

(3)

48 96

160

280 420 720

1200 1650

3300 5500

8000

10,000

Table 3. Bellows Pressure Ranges and Materials

PRESSURE RANGES

0 to 150 mbar (0 to 60 inch wc)

Vacuum

0 to 340 mbar (0 to 10 inch Hg) 0 to 1.0 bar (0 to 30 inch Hg)

Compound pressure

Gauge pressure

Positive pressure

75 mbar vac. to 75 mbar (30 inch wc vac. to 30 inch wc) 1.4 20 6.9 100 500 mbar vac. to 500 mbar (15 inch Hg vac. to 7.5 psig) 2.8 40 6.9 100

1.0 bar vac. to 1.0 bar (30 inch Hg vac. to 15 psig) 2.8 40 - - - - - 0 to 150 mbar (0 to 60 inch wc)

0 to 250 mbar 0 to 350 mbar

(2)

(0 to 100 inch wc)

(3)

(0 to 140 inch wc) 0 to 0.35 bar (0 to 5 psig) 0 to 0.5 bar (0 to 7.5 psig)

0 to 0.7 bar (0 to 10 psig) 0 to 1.0 bar (0 to 15 psig) 0 to 1.4 bar (0 to 20 psig) 0 to 2.0 bar (0 to 30 psig)

0 to 200 mbar (0 to 80 inch wc)

Differential pressure

(4)

0 to 0.7 bar (0 to 10 psi) 0 to 1.4 bar (0 to 20 psi) 0 to 2.0 bar (0 to 30 psi)

1. Bellows may be pressured to limit shown without permanent zero shift.

2. C1B transmitter only.

3. Except C1B transmitter.

4. The overrange limit for these sensing elements is a differential pressure equal to the maximum allowable static pressure limit.

Brass Construction

Bar Psig Bar Psig

1.4

2.8

1.4

2.8

1.4

2.8

- - -

MATERIAL

(4)

316 Stainless Steel

MAXIMUM ALLOWABLE

STATIC PRESSURE LIMITS

Stainless Steel

Construction

20 40 40

20 20 40 40 40

40 40 40 40

20 40 40

- - -

6.9

- - -

6.9

- - -

6.9

- - -

6.9

(1)

- - -

100

- - -

100

- - -

100

- - -

100

Table 4. Supply Pressure Data

Output Signal

Bar

Psig

1. If this pressure is exceeded, control may be impaired.

2. If this pressure is exceeded, damage to the controller may result.

0.2 to 1.0 or 0 and 1.4 (differential gap) 1.4 2.8

0.4 to 2.0 or 0 and 2.4 (differential gap) 2.4 2.8 3 to 15 or 0 and 20 (differential gap) 20 40 6 to 30 or 0 and 35 (differential gap) 35 40

Normal Operating Supply

Pressure

(1)

Maximum Allowable Supply Pressure To Prevent

Internal Part Damage

(2)

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Emerson Fisher C1 Data Sheet

Specifications and Main Features

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