Emerson Fisher 4195K Data Sheet

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Fisherr 4195K Gauge Pressure Indicating

Controllers

Fisher 4195K gauge pressure indicating controllers

show process pressure and set point on an

easy‐to‐read process scale. The controllers compare

process pressure with an operator‐adjusted set point

and delivers a pneumatic signal to a control element so

that process pressure changes toward the set point.

Controller types are available for proportional‐only,

proportional‐plus‐reset, proportional‐plus‐reset‐

plus‐rate, and differential gap for on‐off control. 4195K

controllers are used in industries where accurate

pressure control and process monitoring are required.

Unless otherwise noted, all NACE references are to

NACE MR0175-2002.

YOKE‐MOUNTED CONTROLLER

INTERIOR OF A FISHER 4195KBME CONTROLLER

Notes:

1 An internal cover protects the proportional band adjustment mechanism. In this photograph, the cover has been removed.

2 Controller components are indicated in figure 1.

W5660‐1

W5663‐1

4195K Pressure Controllers

D200050X012

Product Bulletin

34.5:4195K

July 2014

4195K Pressure Controllers

D200050X012

Product Bulletin

34.5:4195K

July 2014

Specifications

Available Configurations

See table 1

Process Sensor Range (Input Signal)

Lower and Upper Range Limits:

As shown in tables 2 and 5

Maximum Allowable Pressure:

As shown in tables 2 and 5

Process Scale

Standard scale is matched to the range of the sensing

element, with exception of receiver controllers.

Optional scales available

(1)

Process Connections

Standard: 1/4 NPT internal stainless steel (all input

ranges)

Optional: 1/2 NPT adaptors (see table 3)

Output Signal

Proportional, 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)

Differential Gap Range:

 0 to 1.4 bar (0 to 20 psig) or

 0 to 2.4 bar (0 to 35 psig)

Action: Field‐reversible between

 direct (increasing

sensed pressure increases output pressure), and

 reverse (increasing sensed pressure decreases

output pressure) action

Supply and Output Connections

1/4 NPT internal

Supply Pressure Requirements

(2)

See table 4

Supply Pressure Medium

Air or natural gas

(3)

Remote Set Point Pressures

 0.2 to 1.0 bar (3 to 15 psig) or  0.4 to 2.0 bar

(6 to 30 psig)

Construction Materials

See table 6

Controller Adjustments

Proportional Band: 5 to 500% of process scale span

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

Differential Gap Controllers: Adjustable from 5 to

100% of process scale span

Set Point: Adjustable from 0 to 100% of the scale span

Controller Performance

Repeatability: 0.4% of output span

Dead Band: Less than 0.4% of process scale span

Typical Frequency Response: 1.5 hertz and 90 degree

phase shift with 3.05 m (10 feet) of 6.4 mm (1/4‐inch)

tubing and 1639 cm

(100 cubic inch) volume

Steady‐State Air Consumption

(4)(5)

0.2 to 1.0 Bar (3 to 15 Psig) Output:

0.09 m

/hr (3.5 scfh)

0.4 to 2.0 Bar (6 to 30 Psig) Output:

0.13 m

/hr (5.0 scfh)

Delivery Capacity

(4)

0.2 to 1.0 Bar (3 to 15 Psig) Output:

6.4 m

/hr (240 scfh)

0.4 to 2.0 Bar (6 to 30 Psig) Output:

9.4 m

/hr (350 scfh)

(continued)

Table of Contents

Features 4.....................................

Construction Features 4.........................

Principle of Operation 8.........................

Proportional-Only Controllers 8..................

Proportional-Plus-Reset and

Proportional-Plus-Reset-Plus Rate Controllers 8..

Differential Gap Controllers 10..................

Remote Set Point Option 10....................

Auto/Manual Station Option 10..................

Anti-Reset Windup Option 11...................

External Feedback Option 11....................

Installation 12.................................

Ordering Information 12.........................

Application 12................................

Construction 12...............................

4195K Pressure Controllers

D200050X012

Product Bulletin

34.5:4195K

July 2014

Specifications (continued)

Exhaust Capacity

(4)

0.2 to 1.0 Bar (3 to 15 Psig) Output:

5.0 m

/hr (186 scfh)

0.4 to 2.0 Bar (6 to 30 Psig) Output:

7.9 m

/hr (295 scfh)

Operative Ambient Temperature Limits

(2)(6)

-40 to 71C (−40 to 160F)

Hazardous Area Classification

Complies with the requirements of ATEX Group II

Category 2 Gas and Dust

Housing

Designed to NEMA 3 (Weatherproof) and IEC 529

IP54 Specifications

Mounting

Controller can be mounted on

 actuator,  panel,

 wall, or  pipestand

Approximate Weight

4.5 kg (10 pounds)

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

1. Consult your Emerson Process Management sales office for additional information.

2. The pressure/temperature limits in this document and any applicable code or standard should not be exceeded.

3. This product can be used with natural gas. Natural gas should not contain more than 20 ppm of H

4. Normal m

/hr‐‐normal cubic meters per hour (m

/hr, 0C and 1.01325 bar, absolute). Scfh‐‐standard cubic feet per hour (ft

/hr, at 60F and 14.7 psig).

5. Without auto/manual station. With auto/manual station air consumption is 0.28 normal m

/hr (10.0 scfh).

6. Also use these temperatures for transportation and storage limits.

Table 1. Available Configurations

TYPE

NUMBER

(1)

MODES OPTIONS

Proportional‐

Only

Proportional‐

Plus‐Reset

Proportional‐

Plus‐Reset‐

Plus‐Rate

Differential

Gap

Anti‐Reset

Windup

(suffix letter F)

Remote

Set Point

(suffix letter M)

Internal Auto/

Manual Station

(suffix letter E)

4195KA

4195KAE

4195KAM

4195KAME

- - -

4195KB

4195KBE

4195KBF

4195KBFE

4195KBM

4195KBME

4195KBFM

4195KBFME

- - -

4195KC

4195KCE

4195KCF

4195KCFE

4195KCM

4195KCME

4195KCFM

4195KCFME

- - -

4195KS

4195KSE

4195KSM

4195KSME

- - -

1. Reverse‐acting constructions are designated by the suffix letter R in the type number.

4195K Pressure Controllers

D200050X012

Product Bulletin

34.5:4195K

July 2014

Features

n Easy Maintenance—Simple design allows fast, easy

maintenance and minimal spare parts inventory.

n Easy Adjustment—Adjusting the set point, the zero

and span of the process pointer, and switching

between direct and reverse action are accomplished

quickly and without special tools. Additionally, the

set point and proportional band can be adjusted

with no interaction between the two adjustments.

n Application Versatility—Either a Bourdon tube or

capsular input element is available to control a wide

range of positive pressures, vacuum pressures, or

compound pressures.

n Mounting Versatility—A 4195K controller can be

mounted directly on the actuator or it can mount

on a pipestand, wall, or in a panel.

n Vibration Resistance—The simple design and low

mass of internal parts allow a 4195K controller to

withstand the vibration levels encountered in most

plant environments.

n High‐Visibility Display—Two red pointers on a

114 mm (4 1/2‐inch) long, white‐on‐black scale

show process pressure and deviation from set point

at a glance. Two other gauges monitor supply

pressure and output pressure.

n Low Air/Gas Consumption—The relay and nozzle

design reduces the steady-state consumption rate

to as low as 0.09 m

/hr (3.5 scfh); 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).

n Corrosion Resistance—Tough, plastic housing resists

such corrosive environments as chemical plants and

the salt spray atmosphere on an offshore oil

platform. Internal constructions are available to

resist a corrosive supply pressure media.

Construction Features

Simplified Relay Maintenance

A clean‐out wire provides a fast, easy means of

cleaning the relay primary orifice during service.

Pressure Protection for the Case

A rubber plug in the plastic case pops out to relieve

excessive pressure buildup inside the case.

Easy Direct/Reverse Switching

Controller action can be switched from direct to

reverse or vice versa by simply loosening the screws on

the proportional band cover and moving the cover out

to rotate the proportional band knob to the desired

action (see figure 1).

Easy Mode Conversion

Conversion from proportional to

proportional‐plus‐reset control requires the addition

of a reset valve and two pieces of tubing. Conversion

from proportional to proportional‐plus‐reset‐plus‐rate

control requires the addition of a reset/rate valve and

three pieces of tubing. Conversion from proportional

to differential gap for on/off control requires the

addition of one piece of tubing.

Anti‐Reset Windup

Anti‐reset windup is available with

proportional‐plus‐reset controllers. A relief valve may

be installed to limit reset windup in either direction.

Remote Set Point

The capability to adjust the set point from a remote

location is available as an option on 4195K controllers.

Auto/Manual Capability

An optional internal auto/manual station permits

smooth, bumpless transfer between automatic control

and manual operation without disturbing the

controller output. A positive‐acting, two‐position

switch, showing either automatic or manual control

mode, is clearly visible with the controller cover

closed.

4195K Pressure Controllers

D200050X012

Product Bulletin

34.5:4195K

July 2014

Table 2. Process Sensor (Capsular Element) Pressure Ratings

CAPSULE

MATERIAL

CAPSULAR

STANDARD RANGES

SPAN

(1)

OPERATING RANGE

OPERATING

LIMIT

(2)

Min Max Min Max

N09902

Nickel Alloy

Metric

units

Positive

pressure

0 to 150 mbar

0 to 400 mbar

0 to 0.6 bar

0.2 to 1 bar

0 to 1 bar

100 mbar

350 mbar

0.35 bar

0.4 bar

0.5 bar

160 mbar

700 mbar

0.7 bar

0.8 bar

1 bar

-350 mbar

-1 bar

350 mbar

1 bar

1.4 bar

510 mbar

1.5 bar

2 bar

0 to 1.4 bar

0 to 1.6 bar

0.4 to 2 bar

0 to 2 bar

0.7 bar

1 bar

0.8 bar

1 bar

1.4 bar

2 bar

1.6 bar

2 bar

-1 bar

1.7 bar

2.4 bar

2 bar

2.4 bar

2.5 bar

3.5 bar

3 bar

3.5 bar

Vacuum

-150 to 0 mbar

-340 to 0 mbar

-400 to 0 mbar

-0.6 to 0 bar

-1 to 0 bar

85 mbar

170 mbar

350 mbar

0.35 bar

0.5 bar

170 mbar

340 mbar

700 mbar

0.7 bar

1 bar

-350 mbar

-480 mbar

-1 bar

350 mbar

480 mbar

1 bar

1.4 bar

510 mbar

724 mbar

1.5 bar

2 bar

Compound

-50 to 100 mbar

-175 to 175 mbar

-150 to 250 mbar

-0.2 to 0.4 bar

100 mbar

175 mbar

350 mbar

0.35 bar

160 mbar

350 mbar

700 mbar

0.7 bar

-350 mbar

-480 mbar

-1 bar

350 mbar

480 mbar

1 bar

510 mbar

724 mbar

1.5 bar

-0.4 to 0.6 bar

-0.6 to 0.8 bar

-1 to 0.6 bar

-1 to 1 bar

0.5 bar

0.7 bar

1 bar

1.4 bar

2 bar

-1 bar

1.4 bar

1.7 bar

2.4 bar

2 bar

2.5 bar

3.5 bar

U.S. units

Positive

pressure

0 to 60 inch wc

0 to 5 psig

0 to 10 psig

3 to 15 psig

0 to 15 psig

40 inch wc

2.5 psig

5 psig

6 psig

7.5 psig

60 inch wc

5 psig

10 psig

12 psig

15 psig

-10 inch Hg

-14 inch Hg

-30 inch Hg

5 psig

7 psig

15 psig

20 psig

7.5 psig

10.5 psig

22.5 psig

30 psig

0 to 20 psig

6 to 30 psig

0 to 30 psig

10 psig

12 psig

15 psig

20 psig

24 psig

30 psig

-30 inch Hg

25 psig

30 psig

35 psig

37.5 psig

45 psig

52.5 psig

Vacuum

-5 to 0 inch Hg

-10 to 0 inch Hg

-20 to 0 inch Hg

-30 to 0 inch Hg

2.5 inch Hg

5 inch Hg

10 inch Hg

15 inch Hg

5 inch Hg

10 inch Hg

20 inch Hg

30 inch Hg

-10 inch Hg

-14 inch Hg

-30 inch Hg

5 psig

7 psig

15 psig

20 psig

7.5 psig

10.5 psig

22.5 psig

30 psig

Compound

-30 to 30 inch wc

-5 inch Hg to 2.5 psig

-10 inch Hg to 5 psig

40 inch wc

2.5 psig

5 psig

60 inch wc

5 psig

10 psig

-10 inch Hg

-14 inch Hg

-30 inch Hg

5 psig

7 psig

15 psig

7.5 psig

10.5 psig

22.5 psig

-15 inch Hg to 7.5 psig

-20 inch Hg to 10 psig

-30 inch Hg to 15 psig

7.5 psig

10 psig

15 psig

20 psig

30 psig

-30 inch Hg

20 psig

25 psig

35 psig

30 psig

37.5 psig

52.5 psig

1. Minimum or maximum span or any span in between may be positioned anywhere within the operating range. For example, if a 0 to 350 mbar (0 to 5 psig) sensing element is used and the

minimum span of 175 mbar (2.5 psig) is set, the process indication can be calibrated to a range of 340 mbar to 203 mbar (10 inch Hg to 6 inch Hg), 0 to 172 mbar (0 to 2.5 psig), 172 to 345

mbar (2.5 to 5 psig), 305 to 480 mbar (4.5 to 7 psig), or any value between minimum and maximum values of operating range.

2. Capsules with the travel stops set may be pressured to this value without permanent zero shift.

Table 3. Optional Process Connection Adaptors

BAR INPUT

RANGE

PSIG INPUT

RANGE

CONNECTION

Size Material

Up to

0 to 400

Up to

0 to 5000

 1/2 NPT external or

 1/2 NPT internal

 steel or

 stainless

steel

0 to 400 to

0 to 600

0 to 5000 to

0 to 10,000

1/2 NPT internal stainless

steel

0 to 400 to

0 to 600

0 to 5000 to

0 to 10,000

1/2 NPT external stainless

steel

Table 4. Supply Pressure Data

Output Signal Range

Normal

Operating

Supply

Pressure

(1)

Maximum

Pressure

Limit

(2)

Bar

0.2 to 1.0 or 0 and 1.4

(diff gap)

1.4 2.8

0.4 to 2.1 or 0 and 2.4

(diff gap)

2.4 2.8

Psig

3 to 15 or 0 and 20 (diff gap) 20 40

6 to 30 or 0 and 35 (diff gap) 35 40

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

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

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