RKI Instruments M2A-XL Manuale utente

RKI Instruments, Inc.

www.rkiinstruments.com

M2A-XL Transmitter

Operator’s Manual

Part Number: 71-0610

Revision: P1

Released: 10/20/22

2• M2A-XL Transmitter Operator’s Manual

WARNING

Read and understand this instruction manual before operating instrument.

Improper use of the gas monitor could result in bodily harm or death.

Periodic calibration and maintenance of the gas monitor is essential for proper

operation and correct readings. Please calibrate and maintain this instrument

regularly! Frequency of calibration depends upon the type of use you have and

the sensor types. For most applications, typical calibration frequencies are

between 3 and 6 months but can be more often or less often based on your

usage.

M2A-XL Transmitter Operator’s Manual • 3

Product Warranty

RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in

materials, workmanship, and performance for a period of one year from date of shipment from

RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at

our option, free of charge. This warranty does not apply to those items which by their nature are

subject to deterioration or consumption in normal service, and which must be cleaned, repaired, or

replaced on a routine basis. Examples of such items are:

• Absorbent cartridges

• Pump diaphragms and valves

•Fuses

•Batteries

• Filter elements

Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair

procedures not in accordance with the operator’s manual. This warranty indicates the full extent

of our liability, and we are not responsible for removal or replacement costs, local repair costs,

transportation costs, or contingent expenses incurred without our prior approval.

THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND

REPRESENTATIONS, EXPRESSED OR IMPLIED, AND ALL OTHER OBLIGATIONS OR

LIABILITIES ON THE PART OF RKI INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO,

THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE. INNO

EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT, INCIDENTAL, OR

CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE OF ITS

PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR OPERATE PROPERLY.

This warranty covers instruments and parts sold to users by authorized distributors, dealers, and

representatives as appointed by RKI Instruments, Inc.

We do not assume indemnification for any accident or damage caused by the operation of this gas

monitor, and our warranty is limited to the replacement of parts or our complete goods.

4• M2A-XL Transmitter Operator’s Manual

Table of Contents

Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About the M2A-XL Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Chapter 2: Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

External Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Internal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Chapter 3: Installation & Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Mounting the M2A-XL Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Wiring the M2A-XL Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 4: Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Normal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Information Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4 - 20 mA Signal Output Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Chapter 5: Configuration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Viewing & Changing M2A-XL Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Chapter 6: Gas Type Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Selecting the Gas Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter 7: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Calibration Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Calibration, Combustible Gas, CO2, and Toxic Versions . . . . . . . . . . . . . . . . . . . . . . . . 58

M2A-XL Transmitter Operator’s Manual • 5

Calibration, Oxygen Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Replacing Components of the M2A-XL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Chapter 8: RS-485 Modbus Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Wiring the M2A-XL in a Modbus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Using the M2A-XL in a 4-wire Modbus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Modbus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Supported Modbus Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Chapter 9: Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Appendix A: Control Button Quick Reference Guide . . . . . . . . . . . . . . . . . . . .91

Appendix B: PLC and DCS Device Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Appendix C: Function Code 16 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

6• Chapter 1: Introduction M2A-XL Transmitter Operator’s Manual

Chapter 1: Introduction

Overview

This chapter briefly describes the M2A-XL Transmitter. This chapter also describes the M2A-XL

Transmitter Operator’s Manual (this document). Table 1 at the end of this chapter lists the

specifications for the M2A-XL.

About the M2A-XL Transmitter

The M2A-XL transmitter is a fixed mount, continuous-monitoring detector head. All user

adjustable parameters may be accessed using push button switches. In addition, calibration may

be performed non-intrusively by use of a magnetic wand accessory which activates magnetic

switches through a window at the front face of the detector head.

The M2A-XL displays the current gas reading on an OLED display which is visible through the

window in the cover (front face) and provides a 4 - 20 mA signal which indicates the target gas

reading for use by a gas monitoring controller, recording device, or programmable controller. The

M2A-XL also provides an RS-485 Modbus output. Three sets of relay contacts, two controlled by

the gas alarms and one by the fail alarm, rated at 115 VAC 5 amps are available for controlling

devices such as lights or horns or for controlling higher rated relays.

Four operating modes allow you to display and change setup and calibration settings and change

the gas type. They are Calibration Mode, Configuration Mode, Gas Type Mode, and Modbus

Mode.

About this Manual

The M2A-XL Transmitter Operator’s Manual uses the following conventions for notes, cautions,

and warnings.

NOTE: Describes additional or critical information.

CAUTION: Describes potential damage to equipment.

WARNING: Describes potential danger that can result in injury or death.

M2A-XL Transmitter Operator’s Manual Chapter 1: Introduction • 7

Specifications

Table 1 lists specifications for the M2A-XL.

Table 1: M2A-XL Specifications

Target Ga s/

Detection Range

Combustible Gas/Carbon Dioxide (CO2)

• Catalytic LEL: 0 - 100% LEL, 1% LEL increments (CH4calibration unless

otherwise specified. H2specific detector available)

• Catalytic CH4ppm: 0 - 9000 ppm, 20 ppm increments

• IR (infrared) CH4LEL: 0 - 100% LEL, 1% LEL increments

• IR HC LEL: 0 - 100% LEL, 1% LEL increments (propane calibration)

• IR CH4Volume: 0 - 5.00% volume, 0.01% increments

• IR CH4Volume: 0 - 100% volume, 1% increments

• IR CO2ppm: 0 - 5,000 ppm, 20 ppm increments

• IR CO2ppm: 0 - 10,000 ppm, 20 ppm increments

• IR CO2Volume: 0 - 5.00% volume, 0.01% increments

• IR CO2Volume: 0 - 50.0% volume, 0.1% increments

• IR CO2Volume: 0 - 100 % volume, 1% increments

Oxygen

• Oxygen (O2): 0 - 25.0% volume, 0.1% increments CO/H2S

• Carbon Monoxide (CO): 0 - 300 ppm, 1 ppm increments

• Carbon Monoxide (CO): 0 - 200 ppm, 1 ppm increments

• Carbon Monoxide (CO): 0 - 100 ppm, 1 ppm increments

• Hydrogen Sulfide (H2S): 0 - 100 ppm, 1 ppm increments

• Hydrogen Sulfide (H2S): 0 - 50 ppm, 0.1 ppm increments

Toxic

• Ammonia (NH3): 0 - 75.0 ppm, 0.1 ppm increments

• Ammonia (NH3): 0 - 100 ppm, 1 ppm increments

• Ammonia (NH3): 0 - 200 ppm, 1 ppm increments

• Ammonia (NH3): 0 - 500 ppm, 1 ppm increments

• Arsine (AsH3): 0 - 1.50 ppm, 0.01 ppm increments

•Chlorine(Cl

2): 0 - 3.00 ppm, 0.01 ppm increments

•Chlorine(Cl

2): 0 - 5.00 ppm, 0.01 ppm increments

•Chlorine(Cl

2): 0 - 10.0 ppm, 0.1 ppm increments

• Chlorine Dioxide (ClO2): 0 - 1.00 ppm, 0.01 ppm increments

• Chlorine Dioxide (ClO2): 0 - 3.00 ppm, 0.01 ppm increments

• Chlorine Dioxide (ClO2): 0 - 5.00 ppm, 0.01 ppm increments

• Hydrogen Cyanide (HCN): 0 - 15.0 ppm, 0.1 ppm increments

• Phosphine (PH3): 0 - 1.00 ppm, 0.01 ppm increments

• Sulfur Dioxide (SO2): 0 - 6.00 ppm, 0.01 ppm increments

• Sulfur Dioxide (SO2): 0 - 10.0 ppm, 0.01 ppm increments

8• Chapter 1: Introduction M2A-XL Transmitter Operator’s Manual

Alarm Settings

(Alarm 1/Alarm 2)*

Ammonia (0 - 75.0 ppm and 0 - 100 ppm): 12 ppm / 25 ppm

Ammonia (0 - 200 ppm): 25 ppm / 35 ppm

Ammonia (0 - 500 ppm): 35 ppm / 300 ppm

Arsine: 0.20 ppm / 0.50ppm

Carbon Dioxide (0 - 5,000 ppm): 2,500 ppm / 5,000 ppm

Carbon Dioxide (0 - 9,000 ppm): 2,000 ppm / 5,000 ppm

Carbon Dioxide (0 - 5.00%): 0.50% / 3.00%

Carbon Dioxide (0 - 50.0%): 50.0% / 50.0%

Carbon Dioxide (0 - 100%): 100% / 100%

Carbon Monoxide (all ranges): 25 ppm / 50 ppm

Chlorine (0 - 3.00 ppm): 0.50 ppm / 1.00 ppm

Chlorine (0 - 5.00 ppm): 0.50 ppm / 1.50 ppm

Chlorine (0 - 10.0 ppm): 1.0 ppm / 3.0 ppm

Chlorine Dioxide (0 - 1.00 ppm): 0.10 ppm / 0.30 ppm

Chlorine Dioxide (0 - 3.00 ppm): 0.30 ppm / 1.00 ppm

Chlorine Dioxide (0 - 5.00 ppm): 0.50 ppm / 1.00 ppm

Combustible Gas (%LEL): 10% LEL / 50% LEL

Combustible Gas (0-100%Volume): 100% / 100%

Hydrogen Cyanide: 5.0 ppm / 10.0 ppm

Hydrogen Sulfide (0 - 50 ppm): 5.0 ppm / 10.0 ppm

Hydrogen Sulfide (0 - 100 ppm): 10 ppm / 50 ppm

Methane (ppm): 5000 ppm / 8000 ppm

Methane (0-5.00%Volume): 0.5% / 2.5%

Oxygen: 19.5% (decreasing) / 23.5% (increasing)

Phosphine: 0.10 ppm / 0.30 ppm

Sulphur Dioxide (both ranges): 1.00 ppm / 2.00 ppm

Construction

(housing)

Explosion-proof Junction Box, NEMA 4X

Area Classification Explosion-proof for Class I, Groups B, C, and D (Combustible, CO2, CSA

Type CO and H2S, and CSA Type oxygen)

Sampling Method Diffusion

Input Power 10 - 30 VDC

Controls • Three push button switches

• Three magnetic switches for non-intrusive calibration

Weight 4.5 lbs.

Signal Output

• 4 to 20 mA with impedance maximums listed below

-12 VDC input: 500 ohms impedance max

-24 VDC input: 1000 ohms impedance max

• RS-485 Modbus

Table 1: M2A-XL Specifications

M2A-XL Transmitter Operator’s Manual Chapter 1: Introduction • 9

WARNING: When using the M2A-XL, you must follow the instructions and warnings in this

manual to assure proper and safe operation of the M2A-XL and to minimize the

risk of personal injury. Be sure to maintain and periodically calibrate the M2A-

XL as described in this manual.

Explosion Proof Non-Explosion

Proof

Operating

Temperature

Catalytic LEL/ppm -40°C to 75°C N/A

Oxygen -20°C to 45°C -20°C to 50°C

H2S -40°C to 40°C -40°C to 50°C

CO -5°C to 40°C -20°C to 50°C

Toxic (ESM-01) N/A -10°C to 40°C

Toxic (CT-7 Series) N/A -20°C to 40°C

Infrared Combustible -20°C to 50°C -40°C to 50°C

Infrared CO2-20°C to 50°C -40°C to 50°C

Accuracy

Catalytic Combustible Gas (LEL range):

± 5% of reading or ± 2% LEL (whichever is greater)

Catalytic CH4(ppm range):

± 5% of reading or ± 50 ppm (whichever is greater)**

IR Combustible Gas/IR CO2:

± 5% of reading or ± 2% of full scale (whichever is greater)

Oxygen:

± 0.5% O2

Hydrogen Sulfide:

± 5% of reading or ± 2 ppm H2S (whichever is greater)

Carbon Monoxide:

± 5% of reading or ± 5 ppm CO (whichever is greater)

Toxic Sensors (ESM-01 Type and CT-7 Series Type):

± 10% of reading or ± 5% of full scale (whichever is greater)

* These are RKI factory settings. See “Viewing & Changing M2A-XL Parameters” on page 47 to

change the alarm settings.

** Independent of zero drift

Table 1: M2A-XL Specifications

10 • Chapter 2: Description M2A-XL Transmitter Operator’s Manual

Chapter 2: Description

Overview

This chapter describes external and internal components of the M2A-XL Transmitter.

External Description

This section describes the junction box and all external components of the M2A-XL transmitter.

Figure 1: M2A-XL External Components

Junction Box

The M2A-XL’s cast aluminum junction box is dust and weather resistant. The junction box also

protects the M2A-XL and all connections made to it. Use the three 3/4 NPT conduit ports to

mount the detector to the junction box (factory installed in the bottom port) and connect wiring

from an external device (left port). The top port is shipped with a factory installed and sealed

conduit plug to avoid leaks into the junction box. If necessary, the conduit plug can be removed

and the top port can be used for wiring.

WARNING: If the top conduit port is used for wiring, be sure to seal the threads to ensure

water does not enter the junction box. See “Wiring the M2A-XL Transmitter” on

page 30 for complete wiring instructions.

Junction Box Cover

Window

Magnetic

Wand

Mounting Hole (2x)

3/4 NPT Conduit Port, Plugged

Detector

(Catalytic LEL Detector Shown)

3/4 NPT

Conduit Port

Indice

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