Rosemount Analytical MCL Data sheet

Rosemount MCL Monochloramine System

LIQ-PDS-MCL

Product Data Sheet

July 2017

Rosemount

TM

MCL

Monochloramine System

A trusted system for making your monochloramine measurements

The RosemountTM MCL monochloramine system is a complete system suitable for measuring monochloramine in fresh water. The
system requires zero sample conditioning reagents.

Rosemount MCL Monochloramine System Rosemount MCL Monochloramine System

July 2017 July 2017

Overview

Ease of Use and Maintenance.

 The Rosemount MCL features a Rosemount 499ACL-03

monochloramine sensor, a transmitter, and constant
head flow controller mounted on a backplate for easy
installation.

 Integrated constant head flow controller eliminates the

need to install additional valves, rotameters, or pressure
regulators.

 Easily replace and perform maintenance and calibration

on the sensor with quick-disconnect Variopol fittings.

 Replacing sensor membrane and electrolyte solution

requires no special tools or fixtures and takes only
minutes.

Reliable Transmitter Options

 Rosemount 56 and 1056 Transmitters are easy to use with

simple and intuitive programming and calibration.

 Both transmitters have fully programmable analog

outputs and fully programmable alarm relays.

Contents

Ordering Information ........................................................................................................................................................................3

Specications ....................................................................................................................................................................................3

Dimensional Drawings .......................................................................................................................................................................6

Rosemount MCL-1056 Engineering Specication ...............................................................................................................................7

Rosemount MCL - 56 Engineering Specication ................................................................................................................................. 8

Component Parts ..............................................................................................................................................................................9

Accessories........................................................................................................................................................................................ 9

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Ordering Information

The Rosemount MCL Monochloramine System consists of a sensor, a
transmitter, quick-disconnect Variopol cable, and constant head flow
controller. All components are mounted on a backplate, and the cable is
pre-wired to the transmitter. Three replacement membranes and a 4 oz
(120 mL) bottle of electrolyte solution are shipped with the sensor.

Table 1. Rosemount MCL Monochloramine System Ordering Information

Model Sensor type

MCL Monochloramine System

Transmitter

220 Rosemount 1056 transmitter, single input, with alarm relays (1056-03-24-38-AN)

240 Rosemount 56 Transmitter, single input (56-03-24-38-HT)

Typical model number: MCL-240

Specifications

Table 2. General Specifications

General

Sample conductivity > 10 µS/cm at 25 °C (77 °F)

Process connection 1/4 in. OD tubing compression fitting (can be removed and replaced with barbed fitting

for soft tubing).

Drain connection 1/4 in. barbed fitting. Sample must drain to open atmosphere.

Wetted parts Acrylic, nylon, polycarbonate, polyester, Kynar1, silicone, Noryl2, Viton3, silicone, and

Zitex4, PTFE , (gold mesh cathode - not normally wetted)

Response time to step change in monochloramine

concentration

Weight/shipping weight (rounded up to the nearest 1

lb or 0.5 kg)

Sample requirements

Pressure 3 to 65 psig (122 to 549 kPa abs). Inlet check valve opens at 3 psig (122 kPa abs). If the

Flow 3 to 80 gal/hr (11 to 303 L/hr)

Temperature 0 to 50 °C (32 to 122 °F)

1. Kynar is a registered trademark of Elf Atochem North America.

2. Noryl is a registered trademark of General Electric.

3. Viton is a registered trademark of E.I. duPont de Nemours & Co.

4. Zitex is a registered trademark of Performance Plastic Corp.

<60 sec to 95% of final reading for inlet sample flow of 17 gph (64 L/hr)

10 lb/143 lb (4.5 kg/6.0 kg))

check valve is removed, minimum pressure is 1 psig (108 kPa abs).

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Rosemount MCL Monochloramine System Rosemount MCL Monochloramine System

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Table 3. Sensor Specifications

Range 0 to 6 ppm as Cl2. For higher ranges, consult the factory.

pH range Signal is practically independent of pH between pH 7.0 and 10.0. Sensor current at pH

10.0 is within 5% of sensor current at pH 7.0.

Accuracy Accuracy depends on the accuracy of the chemical test used to calibrate the sensor.

Linearity 2% (typ.)

Interferences Free chlorine and other oxidizing agents

Electrolyte volume 25 mL (approx.)

Electrolyte life 2 months (approx.)

Table 4. Rosemount 1056 Transmitter Specifications

Display Monochromatic back-lit LCD. Main character height 0.6 in. (15 mm). Display is user-programmable.

Languages English, French, German, Italian, Spanish, Portuguese, and Chinese

Ambient temperature and humidity 0 to 55 °C (32 to 131 °F); relative humidity 5 to 95% (non-condensing)

Storage temperature -20 to 60 °C (-4 to 140 °F)

Power 85 to 265 Vac, 47.5 to 65.0 Hz, switching, 15 W

Equipment protected by double insulation.

RFI/EMI

LVD

Alarms Four alarm relays. Any relay can be configured as a fault alarm instead of a process alarm. Each relay can be

Conduit openings Accepts PG 13.5 or 1/2 in. conduit fittings

Terminal connections rating Power connector (3-leads): 18-12 AWG wire size. Current output connectors (2-leads): 24-16 AWG wire

Relay contact ratings

Relays Form C, SPDT, epoxy sealed

Case Polycarbonate NEMA 4X/CSA 4 (IP65)

Hazardous location approvals For more information, refer to the Rosemount 1056 product data sheet. Approvals apply to the transmit-

EN 61326

EN 6101-01

configured independently, and each can be programmed with interval timer settings.

size. Alarm relay terminal blocks: 18 - 16 AWG wire size

5A at 28 Vdc or 300 Vac (resistive)

1/8 HP at 120/240 Vac

ter only. The MCL is not suitable for use in hazardous areas.

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Table 5. Rosemount 56 Transmitter Specifications

Display Full color LCD, 3.75 x 2.20 in. (95 x 56 mm); display can be customized..

Languages English, French, German, Italian, Spanish, Portuguese, Chinese, Russian, and Polish

Ambient temperature and humidity -10 to 60 °C (14 to 140 °F); relative humidity 5 to 95% (non-condensing). Between -5 and 55 °C (23 and

131 °F) there is no visible degradation in display response or performance.

Storage temperature -20 to 60 °C (-4 to 140 °F)

Power 85 to 265 Vac, 47.5 to 65.0 Hz,20 W.

RFI/EMI

LVD

Alarms and timers Four relays, fully configurable as a setpoint alarm, interval timer, TPC, bleed and feed timer, delay timer,

Outputs Four 4-20 or 0-20 mA isolated current outputs; assignable to measurement or temperature; fully scalable;

Control features PID control (analog ouput) and time proportional control or TPC (relays) are standard.

Relay contact ratings

Relays Form C, SPDT, epoxy sealed

Case Polycarbonate

Hazardous location approvals For more information, refer to the Rosemount 56 product data sheet. Approvals apply to the transmitter

Data logger Data automatically stored every 30 seconds for 30 days; older data removed to make room for new data.

Event logger Stores up to 300 events with date and time stamps: faults, warnings, calibration data, calibration results

Data and event downloading Through USB port on front panel

Graphical display Dual graphical display shows measurement data on the Y-axis and time on the X-axis. Y-axis is fully assign-

Digital communication HART digital communication is standard.

EN 61326

EN 6101-01

date and time timer, and fault alarm

maximum load 550 Ω. HART digital signal is superimposed on output 1.

5A at 28 Vdc or 300 Vac (resistive)

1/8 HP at 120/240 Vac

only. The MCL is not suitable for use in hazardous areas.

The following data are automatically stored: date and time, ppm, temperature, and raw sensor current.

(pass or fail), power on/off cycles, and hold on/off. Alarm relay activation and deactivation can also be

stored. Older events are automatically removed to make room for new events.

able and scalable. X-axis can be set to 1 hour, 1 day, 7 days, or 30 days.

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Dimensional Drawings

Figure 1. Rosemount MCL-220 shown. All versions of the Rosemount MCL have the same overall dimensions.

MILLIMETER

INCH

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Rosemount MCL-1056 Engineering Specification

1. The system shall be suitable for the determination of
monochloramine in water without sample conditioning
reagents. Systems that use sample conditioning reagents
are not acceptable.

2. The system shall consist of a transmitter, a

monochloramine sensor, a ow cell for the sensor, and
a ow controller. The components shall be mounted on

a back plate. The sensor cable shall be pre-wired to the
transmitter and shall plug into the cable using a Variopol

quick disconnect tting. The ow cell shall be clear plastic

to allow the sensor to be easily inspected for fouling. The

inlet shall be tted with a check valve to ensure the sensors
remain wet in the event sample ow is lost.

3. The system shall use no mechanical devices, such as

pressure regulators, valves, or rotameters, to control ow.
Instead, ow shall be regulated using a constant head ow
controller. Minimum sample ow shall be not more than

about 3 gallons per hour (11 liters per hour). Maximum

ow can be as high as 80 gallons per hour (303 liters per
hour). The ow controller shall be able to handle inlet

pressure between 3 and 65 psig (122 and 549 kPa abs) and
temperature between 0 and 50 °C (32 and 122 °F).

4. The monochloramine sensor shall be a two electrode
membrane-covered sensor with a gold mesh cathode

and a silver/silver chloride anode. The ll solution shall

be a solution of potassium bromide in dilute acetic acid.

The sensor shall be tted with an RTD to allow continuous

correction for changes in membrane permeability caused
by temperature.

10. The transmitter shall have a four line, back-lit display. The
display shall show ppm monochloramine and temperature
on one screen. The user shall be able to customize the main
display to show additional information, such as raw sensor
current.

11. The transmitter shall be capable of operating between 0
and 55 °C (32 and 131 °F) and between 5 and 95% relative
humidity (non-condensing).

12. The transmitter shall have dual 0/4-20 isolated outputs.
Outputs shall be fully scalable and assignable independent
to monochloramine or temperature.

13. The transmitter shall have four alarm relays, fully
programmable for logic (high or low operation), deadband,

and set point. Relays can also be congured to energize

when the transmitter detects a fault with the sensor or the
transmitter.

14. All transmitter programming shall be through a front panel
membrane keypad. The language (English, Spanish, Italian,
Portuguese, German, or French) used in the menu screens
shall be selectable by the user.

15. The transmitter shall have a security feature to prevent

unauthorized tampering with calibration and conguration

settings.

16. The transmitter shall be Rosemount Model MCL-220.

5. The effect of pH on sensor response shall be less than 5%
between pH 7.0 and 10.0.

6. The linear range of the sensor shall be at least 0 to 6 ppm
as Cl2.

7. The linearity shall be about 2%.

8. The transmitter shall receive the raw signal from the
monochloramine sensor and automatically correct it for
temperature effects. Results shall be displayed as ppm Cl2.

9. The transmitter shall require single point calibration if the
expected monochloramine level is within the linear range
of the sensor. A correction for the sensor zero current shall
also be available.

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Rosemount MCL Monochloramine System Rosemount MCL Monochloramine System

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Rosemount MCL - 56 Engineering Specification

1. The system shall be suitable for the determination of
monochloramine in water without the use of reagents.
Systems that use sample conditioning reagents are not
acceptable.

2. The system shall consist of a transmitter, a

monochloramine sensor, a ow cell for the transmitter,
and a ow controller. The components shall be mounted

on a back plate. The sensor cable shall be pre-wired to the
transmitter, and the sensor shall plug into the cable using a

Variopol quick disconnect tting. The sensor ow cell shall

be clear plastic to allow the sensor to be easily inspected

for fouling. The inlet shall be tted with a check valve to
ensure the sensor remains wet if sample ow is lost. The

inlet connector shall be a 1/4 inch tubing compression

tting.

3. The system shall use no mechanical devices, such as

pressure regulators, valves, or rotameters, to control ow.
Instead, ow shall be regulated using a constant head ow
controller. Minimum sample ow shall be no more than

about 3 gallons per hour (11 liters per hour). Maximum

ow can be as high as 80 gallons per hour (303 liters per
hour). The ow controller shall be able to handle inlet

pressure between 3 and 65 psig (122 and 549 kPa abs) and
temperature between 0 and 50 °C (32 and 122 °F).

4. The monochloramine sensor shall be a two-electrode,
membrane-covered amperometric sensor using a gold

mesh cathode and a silver/silver chloride anode. The ll

solution shall be a solution of potassium bromide in dilute

acetic acid. The sensor shall be tted with a pt100 RTD

to allow continuous correction for changes in membrane
permeability caused by temperature.

5. The effect of pH on sensor response shall be less than 5%
between pH 8.0 and 10.0.

6. The linear range of the sensor shall be at least 0 to 6 ppm
as Cl2.

7. The linearity shall be about 2%.

8. Sensor electrolyte life shall be about four months.

9. The transmitter shall use a single point calibration based on
the results of a test run on a grab sample. A correction for
the zero current shall also be available.

10. The transmitter shall have a four line, back-lit display.
The display shall show ppm chlorine, pH (if required),
and temperature on one screen. The display shall be
programmable to show additional information, such as raw
sensor current.

11. The transmitter shall be capable of operating between -10
and 60 °C (14 and 140 °F) and between 5 and 95% relative
humidity.

12. The transmitter shall have four 0/4-20 mA isolated outputs
and HART digital communications. Outputs shall be fully
scalable and assignable independently to chlorine, pH, or
temperature. PID control shall be available as a standard
feature.

13. The transmitter shall have four alarm relays, fully
programmable as a high/low alarm with adjustable
deadband or as a timer. Timer functions shall include an
interval timer, bleed and feed timer, delay timer, and
date and time timer. Time-proportional control shall also

be available. In addition, relays shall be congurable to

energize when the transmitter detects a fault with itself or
the sensor.

14. All transmitter programming shall be through a front panel
membrane keypad. The language (English, Spanish, Italian,
Portuguese, German, French, Russian, Polish, or Chinese)
used in the menu screens shall be selectable by the user.

15. The transmitter shall have a data logger that automatically
stores data every 30 seconds for 30 days, with older data
being discarded to make room for newer data. In addition
to storing date and time, chlorine concentration, pH, and
temperature, the transmitter shall store raw sensor current
(chlorine sensor) and mV reading and glass and reference
impedance (pH sensor). Stored data shall be downloadable
through a USB port.

16. The transmitter shall have a dual graphic display that allows
data to be viewed over 1 hour, 1 day, 7 days, and 1 month
intervals.

17. The transmitter shall have a data logger that stores up to
300 events.

18. The transmitter shall have help screens, available at
the touch of a button, that provide information about

conguration, calibration, and troubleshooting.

19. The transmitter shall have a security feature to prevent

unauthorized tampering with calibration and conguration

settings.

20. The transmitter shall be Rosemount Model MCL-240 or
approved equal.

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Component Parts

Transmitter model Description

1056-03-38-AN Rosemount 1056 Transmitter, single input, with alarm relays, 85 - 265 Vac, 47.5 - 65.0 Hz

56-03-24-38-HT Rosemount 56 Transmitter, single input, 85 - 265 Vac, 47.5 - 65.0 Hz

Sensor model Description

499ACL-03-54-VP Monochloramine sensor with Variopol connector

Sensor cabler Description

23747-04 Interconnecting cable, Variopol for Rosemount 499ACL sensor, 4 ft

Accessories

Part number Description

9240048-00 Tag, stainless steel (specify marking)

23750-00 Fill plug with wooden osmotic pressure relief port

9550094 O-ring, Viton 2-014

33521-00 Membrane retainer cap

23502-09 Monochloramine membrane kit: includes 3 membrane assemblies and 3 O-rings

9210372 Monochloramine sensor fill solution, 4 oz (120 mL)

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Rosemount MCL Monochloramine System Rosemount MCL Monochloramine System

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Notes

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Notes

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Rosemount MCL Monochloramine System

LIQ-PDS-MCL

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Product Data Sheet

July 2017

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