Rosemount 499ACL-03 Monochloramine Sensor Quick Start Guide

Rosemount™ 499ACL-03

Monochloramine Sensor

Quick Start Guide

00825-0300-3499, Rev AB

November 2019

Quick Start Guide November 2019

Safety information

CAUTION

Sensor/process application compatibility

The wetted sensor materials may not be compatible with process composition and operating
conditions.

Application compatibility is entirely the operator's responsibility.

CAUTION

Equipment damage

Do not exceed pressure and temperature specifications

Pressure: 65 psig (549 kPa abs) max.
Temperature: 32 to 122 °F (0 to 50 °C)

WARNING

Physical access

Unauthorized personnel may potentially cause significant damage to and/or misconfiguration of end
users’ equipment. This could be intentional or unintentional and needs to be protected against.

Physical security is an important part of any security program and fundamental to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is true for
all systems used within the facility.

Contents

First steps.....................................................................................................................................3

Install........................................................................................................................................... 5

Wire............................................................................................................................................. 7

Calibrate.................................................................................................................................... 12

Maintenance.............................................................................................................................. 14

Accessories................................................................................................................................ 16

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November 2019 Quick Start Guide

1 First steps

1.1 Unpack and inspect

Procedure

1. Inspect the shipping container. If it is damaged, contact the shipper
immediately for instructions.

2. If there is no apparent damage, unpack the container. Be sure all
items shown on the packing list are present. If items are missing,
notify Emerson immediately.

1.2 Product description

Figure 1-1: Rosemount 499ACL-03 Sensor Parts

A. Membrane retainer
B. Membrane assembly
C. O-ring

D. Cathode

E. Electrolyte fill plug (wrap with pipe tape)
F. Pressure equalizing port

G. Sensor cable (integral cable shown)

1.3

Table 1-1: Sensor Specifications

Physical characteristics Specifications

Pressure Sensor must drain to open atmosphere. No back pressure.

Temperature (operating) 32 to 122 °F (0 to 50 °C)

Process connection 1-in. male national pipe thread (MNPT)

Wetted parts Noryl®, Viton®, silicone, wood, and Zitex® (PTFE)

Quick Start Guide 3

Specifications

Quick Start Guide November 2019

Table 1-1: Sensor Specifications (continued)

Physical characteristics Specifications

Cathode Gold mesh

Linearity 2% (typical)

Table 1-2: Other Specifications

Type PN Wetted

Low flow cell
with bubble
sweeping

(1)

nozzle

(1) Flow cell must drain to open atmosphere. Do not install the sensor in a pressurized line.

Temperature and pressure specifications for the low flow cell exceed the temperature and
pressure specifications for the sensor.

24091-01 Polycarbon-

materials

ate/
polyester,
316 stainless
steel, and
silicone

Process
connection

Compression
fitting for
¼-in. O.D.
tubing

Maximum
temperature

158 °F (70 °C) 90 psig

Maximum
pressure

(722 kPa abs)

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November 2019 Quick Start Guide

2 Install

Install sensor in the low flow cell (PN 24091-01) only. Keep the flow as
constant as possible between 1 and 4 gph (3.8 to 15 L/hr). The flow cell must
drain to open atmosphere.

Figure 2-1: Sensor Orientation

Install sensor within 45 degrees of vertical.

Quick Start Guide 5

Quick Start Guide November 2019

Figure 2-2: Low Flow Cell (PN 24091-00)

A. Inches
B. Millimeters
C. Outlet

D. Inlet

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November 2019 Quick Start Guide

3 Wire

NOTICE

For additional wiring information on this product, including sensor
combinations not shown here, please refer to the Liquid Transmitter Wiring

Diagrams.

Figure 3-1: Rosemount 499ACL-03 Sensor Wiring to Rosemount 1056
and 56 Transmitters

Table 3-1: Rosemount 499ACL-03 Sensor Wiring to Rosemount 1056 and 56
Transmitters

Terminal
number

1 A White Resistance temperature

2 B White/red RTD sense

3 C Red RTD in

4 D Clear RTD shield

5 N/A N/A +5 V out

6 N/A N/A -4.5 V out

7 D Clear Anode shield

8 E Gray Anode

9 D Clear Cathode shield

Quick Start Guide 7

Letter Wire color Description

device (RTD) return

Quick Start Guide November 2019

Table 3-1: Rosemount 499ACL-03 Sensor Wiring to Rosemount 1056 and 56
Transmitters (continued)

Terminal
number

10 F Orange Cathode

Letter Wire color Description

Figure 3-2: Rosemount 499ACL-03 Sensor Wiring to Rosemount 5081
Transmitter

Table 3-2: Rosemount 499ACL-03 Sensor Wiring to Rosemount 5081 Transmitter

Terminal
number

1 N/A N/A N/A

2 N/A N/A +0.8 V

3 A White RTD return

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Letter Wire color Description

November 2019 Quick Start Guide

Table 3-2: Rosemount 499ACL-03 Sensor Wiring to Rosemount 5081 Transmitter

(continued)

Terminal
number

4 B White/red RTD sense

5 C Red RTD in

6 N/A N/A Reference guard

7 N/A N/A Reference in

8 D Clear Solution ground

9 N/A N/A pH guard

10 N/A N/A pH in

11 N/A N/A -5 V

12 N/A N/A +5 V

13 E Gray Anode

14 F Orange Cathode

15 N/A N/A HART®/FOUNDATION™ Fieldbus

16 N/A N/A HART/FOUNDATION Fieldbus (+)

Letter Wire color Description

(-)

Quick Start Guide 9

Quick Start Guide November 2019

Figure 3-3: Rosemount 499ACL-03 Sensor Wiring to Rosemount 1066
Transmitter

Note

Connect clear shield wires to solution ground terminal on TB 2. Use wire nut
and pigtail if necessary.

Table 3-3: Rosemount 499ACL-03 Wiring to Rosemount 1066
Transmitter

Letter Color Terminal description

A Orange Cathode

B Gray Anode

C White Return

D White/red Sense

E Red RTD in

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November 2019 Quick Start Guide

Figure 3-4: Rosemount 499ACL-03-01-54-VP Sensor Pin-out Diagram
(Top View of Connector End of Sensor)

Table 3-4: Pin-out Diagram

Terminal number Description

1 Cathode

2 N/A

3 RTD sense

4 Anode

5 RTD return

6 RTD in

When making a connection through a junction box (PN 23550-00), wire
point-to-point.

NOTICE

Use a wire nut and pigtail (included) when connecting several wires to the
same terminal.

Quick Start Guide 11

Quick Start Guide November 2019

4 Calibrate

4.1 Zero point calibration

Even in the absence of monochloramine, the sensor generates a small signal
called the zero current. Failing to correct for the zero current can introduce a
bias, particularly if the monochloramine concentration is small (<0.4 ppm).
Zero the sensor when it is first placed in service and every time the fill
solution is changed.

To zero the sensor:

Procedure

1. Pour a cup of deionized or bottled water.

2. Place the sensor in the water.

3. Wait until the sensor current has reached a stable low value (at least
two hours).

4. Follow the transmitter prompts for zeroing the sensor.

Note

Refer to the manual for the transmitter you are using (Rosemount
56, 1056, or 1066).

The zero current should be between -10 and +15 nA. For more information,
refer to the transmitter manual.

4.2

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Full scale calibration

Because stable dilute monochloramine standards are not available, the
sensor must be calibrated against the results of a laboratory test run on a
grab sample of the process liquid.

Procedure

1. Place the sensor in the flow cell.

2. Start the sample and reagent flow.

3. Adjust the sample flow to between 1 and 4 gph.

4. Adjust the concentration so that it is near the upper end of the
operating range.

5. Wait for the readings to stabilize.

6. Follow the transmitter prompts to complete the calibration.

Note

Refer to the manual for the transmitter you are using (Rosemount
56, 1056, or 1066).

November 2019 Quick Start Guide

Be sure taking the sample does not alter flow to the sensor.

7. After calibration, go to the Diagnostics menu and check the
sensitivity.

The sensitivity should be between 250 and 450 nA/ppm. For more
information, refer to the transmitter manual.

Quick Start Guide 13

Quick Start Guide November 2019

5 Maintenance

WARNING

Pressurized spray injury

Before removing the sensor, be absolutely certain that the process pressure
is reduced to 0 psig and the process temperature is lowered to a safe level!

5.1 Cleaning the membrane

Keep the membrane clean and free from dirt and algae. Periodically inspect
the membrane. If it appears fouled, clean the membrane with water sprayed
from a wash bottle.

CAUTION

EQUIPMENT DAMAGE
Do not wipe the membrane with a tissue. Do not touch the membrane.
Doing so may damage the cathode, making the sensor unusable.

5.2 Replacing the electrolyte solution and membrane

WARNING

Corrosive substance

Fill solution is corrosive.

Avoid contact with skin and eyes.
Consult Material Safety Data Sheet (MSDS) for safety information.

Procedure

1. Unscrew the membrane retainer.

2. Remove the membrane assembly and O-ring.
See Figure 1-1.

3. Hold the sensor over a container with the cathode pointing down.

4. Remove the fill plug.

5. Allow the electrolyte solution to drain out.

6. Remove the old pipe tape from the plug.

7. Wrap the plug with one or two turns of pipe tape..

8. Prepare a new membrane.

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November 2019 Quick Start Guide

a) Hold the membrane assembly with the cup formed by the

membrane and membrane holder pointing up.

b) Fill the cup with electrolyte solution.

9. Hold the sensor at about a 45 degree angle with the cathode end
pointing up.

10. Add electrolyte solution through the fill hole until the liquid
overflows.

11. Tap the sensor near the threads to release trapped air bubbles.

12. Add more electrolyte solution if necessary.

13. Place the fill plug in the electrolyte port and begin screwing it in.

14. After several threads have engaged, rotate the sensor so that the
cathode is pointing up and continue tightening the fill plug.

Do not overtighten.

15. Place a new O-ring in the groove around the cathode post.

16. Cover the cathode with electrolyte solution; then place the
membrane assembly over the cathode.

17. Screw the membrane retainer in place.

18. Hold the sensor with the cathode end pointing down.

19. Give the sensor several sharp shakes to dislodge air bubbles trapped
behind the cathode.

The sensor may require several hours operating at the polarizing
voltage to equilibrate after the electolyte solution has been replaced.

Quick Start Guide 15

Quick Start Guide November 2019

6 Accessories

Part # Description

23750-00 Electrolyte fill plug with wooden osmotic pressure relief

9550094 O-ring, Viton 2-014

33521-00 Membrane retainer

23501-09 Monochloramine membrane assembly: includes one

23502-09 Monochloramine membrane kit: includes three

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

port

membrane assembly and one O-ring

membrane assemblies and three O-rings

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November 2019 Quick Start Guide

Quick Start Guide 17

Quick Start Guide November 2019

18 Emerson.com/Rosemount

November 2019 Quick Start Guide

Quick Start Guide 19

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*00825-0300-3499*

Quick Start Guide

00825-0300-3499, Rev. AB

November 2019

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