Detcon DM-100 Series, DM-100, DM-100 O2 Operator's Installation And Instruction Manual

DETCON, INC.

RANGE

100 PPM

DM-100

GAS

H2S

DETCON, Inc.

June 08, 2018 • Document #3604 • Revision 3.5

Model DM-100

DM-100 Toxic Gas Sensors

DM-100 O2 Deficiency Sensors

Operator’s Installation and Instruction Manual

Covers all Model DM-100 Sensors

4055 Technology Forest Blvd,

The Woodlands, Texas 77381

Ph.281.367.4100 / Fax [phone]

www.detcon.com

Model DM-100

This page left intentionally blank

Model DM-100 ii

Model DM-100

Table of Contents

1. Introduction ..................................................................................................................................................1

1.1 Description .......................................................................................................................................... 1

1.2 Modular Mechanical Design ............................................................................................................... 2

1.3 Model 100 Standard Terminal Board (Optional) ................................................................................ 4

1.4 DM-100 Display Terminal Board (Optional) ..................................................................................... 4

1.5 DM-100 Series Display (Optional) ..................................................................................................... 5

1.6 Wireless Transceiver and Battery Pack ( Optional) ............................................................................. 5

2. Installation ....................................................................................................................................................6

2.1 Hazardous Locations Installation Gui delines for Safe Use ................................................................. 6

2.2 Sensor Placement ................................................................................................................................ 7

2.3 Sensor Contaminants and Interference ............................................................................................... 8

2.4 Sensor Mounting ................................................................................................................................. 8

2.5 Electrical Installation .......................................................................................................................... 9

2.6 Field Wiring ...................................................................................................................................... 10

2.6.1 DM-100 Display Terminal Board Settings ................................................................................... 11

2.7 Initial Start Up................................................................................................................................... 11

2.7.1 Toxic Gas Sensors ........................................................................................................................ 11

2.7.2 O

3. Operation .................................................................................................................................................... 14

3.1 Normal Operation ............................................................................................................................. 14

3.2 Auto Span Level Adjustment ............................................................................................................ 14

3.3 Calibration ........................................................................................................................................ 15

3.3.1 Zero Calibration ............................................................................................................................ 15

3.3.2 Span Calibration ........................................................................................................................... 17

3.4 Fault Diagnostic/Failsafe Feature ..................................................................................................... 19

4. Service and Maintenance ............................................................................................................................ 20

4.1 Replacement of Plug-in Sensor ......................................................................................................... 20

4.2 Replacement of ITM ......................................................................................................................... 21

4.3 Replacement of the Model 100 Terminal Board ............................................................................... 21

5. Troubleshooting Guide ............................................................................................................................... 23

5.1 Smart Display Error Codes ............................................................................................................... 25

6. Customer Support and Service Policy ........................................................................................................ 26

7. DM-100 Sensor Warranty .......................................................................................................................... 27

8. Appendix .................................................................................................................................................... 28

8.1 Specifications .................................................................................................................................... 28

8.2 Sensor Specific Data ......................................................................................................................... 29

8.3 Interference Table ............................................................................................................................. 31

8.4 Proper Application and Maintenance of Acrylonitrile Sensor .......................................................... 37

8.5 Intrinsically Safe Installation Guidelines, Control Drawing #3993 .................................................. 38

8.6 Spare Parts, Sensor Accessories, Calibration Equipment ................................................................. 39

8.7 Revision Log ..................................................................................................................................... 40

Deficiency Sensors .................................................................................................................. 13

2

Model DM-100 iii

Model DM-100

Shipping Address: 4055 Technology For est Blvd, The Woodlands, Texas 77381

Phone: [phone] • F ax: 281.292.2860 • www.detcon.com • [e-mail]

Table of Figures

Figure 1 Sensor Assembly with Optional J-Box and LED Display ..................................................................... 1

Figure 2 Construction of Electrochemical Toxic Sensor...................................................................................... 1

Figure 3 Construction of Galvanic Cell ................................................................................................................ 2

Figure 4 Sensor Assembly Breakaway ................................................................................................................. 2

Figure 5 Functional Block Diagram ..................................................................................................................... 3

Figure 6 Plug-in Sensor ........................................................................................................................................ 3

Figure 7 DM Standard Terminal Board ................................................................................................................ 4

Figure 8 Model 100 Display Terminal Board ...................................................................................................... 4

Figure 9 Model 100 Series Display ...................................................................................................................... 5

Figure 10 Approval Label .................................................................................................................................... 6

Figure 11 Typical DM-100 Sensor Assembly and Mounting Dimensions .......................................................... 9

Figure 12 Typical Installation ............................................................................................................................ 10

Figure 13 Magnetic Programming Tool ............................................................................................................. 14

Figure 14 Magnetic Programming Switches ...................................................................................................... 14

Figure 15 Control Drawing #3993 ..................................................................................................................... 38

List of Tables

Table 1 Terminal Board Connectors .................................................................................................................... 5

Table 2 Model 100 Terminal Board Jumper ...................................................................................................... 11

Table 3 Sensor Specific Data ............................................................................................................................. 29

Table 4 Interfering Gases ................................................................................................................................... 31

Table 5 Cross Interference Table ....................................................................................................................... 32

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

Model DM-100 iv

Model DM-100

DETCON, INC.

H2S

100 PPM

DM-100

Model 100

1. Introduction

1.1 Description

Detcon Model DM-100 toxic gas and O
designed to detect and monitor a wide range of toxic gases in the air. Ranges of detection for toxic gases are 0­1ppm up to 0-10,000ppm; typical ranges of detection are 0-10ppm, 0-25ppm, 0-50ppm and 0-100ppm. Ranges
for O

deficiency are 0-1% up to 0-25% by volume.

2

The basic sensor assembly consists of an electrochemical fuel cell mounted in Intrinsically Safe stainless s teel
housing and includes a Splash Guard Cal Adapter. Optionally, the sensor can be installed on an explosion
proof junction box with a Model 100 Terminal Board and may include a Model 100 Loop Powered LED
display. Other options are available, contact Detcon for more information.

deficiency sensors are non-intrusive 4-20mA loop powered sensors

2

Figure 1 Sensor Assembly with Optional J-Box and LED Display

Electrochemical Sensor Technology

The DM-100 toxic gas sensors are based on electrochemical cells. Each cell consists of three electrodes
embedded in an electrolyte solution all housed beneath a diffusion membrane. Sensitivity to specific target
gases is achieved by varying composition of any combination of the sensor components. Go od specificity is
achieved in each sensor type. The cells are diffusion limited via small capillary barriers resulting in a long
service life of up to three or more years. The electrochemical cell is packaged as a field replaceable pl ug-in
sensor.

Figure 2 Construction of Electrochemical Toxic Sensor

DM-100 Instruction Manual Rev. 3.5 Page 1 of 41

Model DM-100

O-Ring

100 Series Bottom

Housing Assembly

Plug-in
Replaceable
Sensor

Interconnect

Wires

Housing Bottom

Locking Screw

Intelligent Transmitter Module (ITM)
Micro-processor controlled circuit
encapsulated in an Explosion proof
housing.

Magnetic

Programming

Switches

Splash Guard

DETCON, INC.

H2S

100 PPM

DM-100

3

4

" NPT Locking Nut

All metal components are constructed from electro polished 316 Stainless Steel in order to
maximize corrosion resistance in harsh en vironments.

The DM-100 O2 deficien cy sensor technology is a two electrode g alvanic metal air battery type cell, wh ich is
housed as a field replaceable intelligent plug-in sensor. The cell is diffusion limited and functions as a dir ect
current generator proportional to the amount of oxygen adsorption. The sensors are temperature co mpensated
and show good accuracy and stability over the operating temperature range of -20° to 50°C (-4° to +122° F).
The sensor is warranted for two years and has an expected service life of up to 2.5 years in ambient air at

20.9% oxygen.

Figure 3 Construction of Galvanic Cell

The Model DM-100 Sensor Assembly is completely modular and is made up of four parts (Figure 4):

1.2 Modular Mechanical Design

1. DM-100 Intelligent Transmitter Module (ITM)

2. Intelligent Plug-in Sensor (varies by gas type and range)

3. 100 Series Bottom Housing Assembly (H2S assemblies use 100 Series Bottom Housing Assembly

with Integral Filter)

4. Splash Guard.

NOTE

Figure 4 Sensor Assembly Breakaway

DM-100 Instruction Manual Rev. 3.5 Page 2 of 41

Model DM-100

RS-485 Port

Analog 4-20mA Out
Power In

RS-485

4-20mA

Intrinsically
Safe Barrier

DM-100 Intelligent Transmitter Module

The Transmitter Module is a microprocesso r-based package that is attached to the explosion proof junction
box.

Circuit functions include;

• an intrinsically safe barrier,

• on-board power supply,

• microprocessor,

• magnetic programming switches,

• and a linear 4-20mA DC output.

Magnetic program switches located on either side of the ITM are activated via a hand-held magnetic
programming tool, thus allowing non-intrusive operator interface with the Transmitter Module. Electrical
classifications are Class I, Division 1 , Groups A, B, C, and D.

Plug-In

Sensor

Micro-

Processor

I/O

Circuit

Protection

Loop

Power

Figure 5 Functional Block Diagram

Field Replaceable Sensor

The Detcon family of electrochemical gas sensors is field proven, plug-in sensors with over-sized gold-plated
connections that eliminate corrosion problems. The sensor can be accessed and replaced in th e field easily by
releasing the locking screw and unthreading the Splash Guard Adapter. Detconꞌs family of toxic sensors has a
long shelf life and is supported by an industry-leading warranty (Section 7).

DM-100 Instruction Manual Rev. 3.5 Page 3 of 41

Figure 6 Plug-in Sensor

Model DM-100

RED

GREEN

BLUE

WHITE

V+
mA

Customer
Wiring

Sensor Wiring

J6

J7

J4

J1

J5

J8

L9

J2

AIN1

W/BK

W/BN

W/BU

W/GN

W/V

WIRELESS

AIN2

MA

GND

PWR

POWER IN
( SOLAR)

WIRELESS
PROGRAM

B

A

GND

24V

MODBUS OUT
( WIRELESS)

24V

GND

A

B

MODBUS IN

24V

GND

A

B

SENSOR

PWR

GND

SCL

SDA

SP1

SP2

DISPLAY

JP1

SW2

SW1

TERM

PROGRAM

POWER

mA

RED

BLACK

BLUE

WHITE

Customer Wiring

1.3 Model 100 Standard Terminal Board (Optional)

If the sensor is ordered with an explosion proof condulet/junction box, the sensor will come with the Model
100 Standard Terminal Board mounted in the J-Box (Figure 7). This terminal board affords the user easy plug­in connectors for use in wiring the unit during installation, and convenient test points for measuring the
milliamp (mA) output.

Figure 7 DM Standard Terminal Board

The standard terminal board provides an easy Digital Volt Meter (DVM) connection for reading the mA output
from the sensor. Two test points (TP1 and TP2) provide a connection across a 10Ω resistor that develops a
10mV voltage drop per 1mA output. Thus a reading of 40mV on a DVM equals 4mA of current. This is an
alternative method to reading the mA output of the sensor for assemblies that do not include the DM-100
Series Display option. Refer to Section 2.6, Field Wiring for more information about the setup of the DM-100
Terminal Board.

1.4 DM-100 Display Terminal Board (Optional)

If the unit is ordered with the optional display or a battery pack (wireless configurations) the uni t comes with
the DM-100 Display Terminal Board mounted in the J-Box (Figure 8).

Figure 8 Model 100 Display Terminal Board

DM-100 Instruction Manual Rev. 3.5 Page 4 of 41

Model DM-100

J1

4-Pin Connector

Modbus Out (Wireless Transceiver Option)

J2

6-Pin Header

Wireless Transceiver Programm i ng Header

J3

6-Beau Connector

Battery operation or display interface dependent on sensor configuration

J4

4-Pin Connector

Modbus In

J5

6-Pin Connector

Display interface with battery/ wi reless configurations

J6

4-Pin Connector

Sensor connections

J7

4-Pin Connector

Auxiliary power in and mA out

J8

6-Pin Connector

Wireless Transceiver

J9

5-Pin Header

Terminal Board Programming

Install JP1 jumper on pins 1 and 2 if a battery pack is used. Install JP1 on pins 2 and 3 if
battery is not used.

This terminal board includes connectors for the following:

Table 1 Terminal Board Connectors

Terminal Connector Purpose

The Model 100 Display Terminal Board does not provide test points for measuring the milliamp (mA) output.
The mA output is available at J7.

NOTE

1.5 DM-100 Series Display (Optional)

The DM-100 Series Display is a 4-digit LED display that provides a direct display of the sensor readings. In
units that are ordered with the optional display, the display is mounted directly onto the J3 Beau connector of
the Display Terminal Board so the display can be easily seen through the J-box window. The display
automatically identifies the ITM, the sen sor typ e, an d rang e. This f actor y installed option must be ordered with
the sensor assembly.

Figure 9 Model 100 Series Display

1.6 Wireless Transceiver and Battery Pack (Optional)

The DM-100 has the option to operate on a wireless netwo rk with the addition of a wireless tran sceiver and
battery pack. These options allow the sensor to be remotely mounted without the need for cables. These
options are factory installed. Contact Detcon for more information on these options.

DM-100 Instruction Manual Rev. 3.5 Page 5 of 41

Model DM-100

2. Installation

2.1 Hazardous Locations Installation Guidelines for Safe Use

1. Install the sensor only in areas with classifications matching the approval label. Follow all warnings

listed on the label.

Figure 10 Approval Label

2. For intrinsically safe Ex ia installations, follow the intrinsical ly safe installation guidelines shown in

control drawing #3993, Section 8.5.

3. For non-intrinsically safe Ex mb [ib] installations, ensure that the sensor is properly threaded into a

suitable explosion-proof rated junction box with a downward pointing female
connection. The sensor should be threaded at least 5 full turns until tight, with the locking screw
facing forward. Avoid use of Teflon Tape, or any type of non-conductive pipe thread coating on the
NPT threaded connection.

4. A good ground connection should be verified between the sensor’s metal enclosure and the junction

box. If a good ground connection is not made, the sensor can be grounded to the junction box using
the sensor’s external ground lug. Verify a good ground connection between the junction box and earth
ground.

5. Proper precautions should be taken during installation and maintenance to avoid the build-up of static

charge on the plastic components of the sensor (Splash Guard and Splash Guard adapter).

6. All input circuits of the DM-100 must be connected to current limiting devices (e.g. Fuses of 1500

amp breaking capacity) to ensure that the maximum input current does not exceed 62mA.

7. Do not substitute components. Substitution of components may impair the intrinsic safety rating.

8. Do not operate the sensor outside of the stated operating temperature limits.

9. Do not operate the sensor outside the stated operating limits for voltage supply.

10. These sensors meet AT E X stand ard s EN60079-0, EN60079-18 and EN60079-11.

11. These sensors have a maximum safe location voltage of Um=60V.

12. These sensors p ass dielectric stren gth of 500VRM S between circuit and enclosure for a minimum of 1

minute at a maximum test current of 5mA.

3

/4" NPT threaded

DM-100 Instruction Manual Rev. 3.5 Page 6 of 41

Model DM-100

In all installations the gas sensor should point straight down (Figure 12). Improper sensor
orientation may result in false readings and permanent sensor damage.

13. The DM-100 may be used as an oxy gen deficiency sensor; the DM-100 must not be used for detecting

oxygen concentrations expected to be greater than 21%.

14. The DM-100 must only use gas senso r cell models 371-xxxxxx-xxx (Table 5, Section 8.1). No other

gas sensor cells shall be used.

2.2 Sensor Placement

Sensor location is critical to the o verall safe pe rformance of t he produ ct. Five factors play an important role in
selection of sensor locations:

1. Density of the gas to be detected

2. Most probable leak sources within the industrial process

3. Ventilation or prevailing wind conditions

4. Personnel exposure

5. Maintenance access

Density

Placement of sensors relative to t he density of the target gas is such that sens ors for the detection of heavier
than air gases should be located within 4 feet of grad e as these heavy gases will tend to settle in low lying
areas. For gases lighter than air, sensor placement should be 4 to 8 feet above grade in open areas or in pitched
areas of enclosed spaces.

Leak Sources

The most probable leak sources within an industrial process include flanges, valves, and tubing connections of
the sealed type where seals may either fail or wear. Other leak sources are best determined by facility
engineers with experience in similar processes.

Ventilation

Normal ventilation or prevailing wind conditions can dictate efficient location of gas sensors in a manner
where the migration of gas clouds is quickly detected.

Personnel Exposure

The undetected migration of gas clouds should not be allowed to approach concentrated personnel ar eas such
as control rooms, maintenance or warehouse buildings. A more general and applicable thought toward
selecting sensor location is combining leak source and perimeter protection in the best po ssible configuration.

Maintenance Access

Consideration should be given to providing easy access for maintenance personnel and the consequences of
close proximity to contaminants that may foul the sensor prematurely.

NOTE

Additional Placement Considerations

The sensor should not be positioned where it may be sprayed or coated with surface contamin ating subst ances.
Painting sensor assemblies is prohibited.

DM-100 Instruction Manual Rev. 3.5 Page 7 of 41

Model DM-100

If wall mounting without a mounting plate, make sure to use at least 0.5" spacers

from the wall and allow access clearance to the senso r assembly.

Do not use Teflon Tape or any other type of Pipe Thread material on the 3/4" threads unless

be externally grounded using a ground strap.

Although the sensor is designed to be RFI resistant, it should not be mounted in close proximity to high­powered radio transmitters or similar RFI generating equipment.

When possible mount in an area void of high wind, accumulating dust, rain, or splashing from hose spray,
direct steam releases, and continuous vibrati on. If the sensor cannot be mounted away from these conditions
then ensure the Detcon Harsh Location Dust Guard accessory is used.

Do not mount in locations where temperatures will exceed the operating temperature limits of the sensor.
Where direct sunlight leads to exceeding the high temperature-operating limit, use a sunshade to help reduce
temperature.

2.3 Sensor Contaminants and Interference

Electrochemical toxic gas may be adv ersely affected by exposure to other airborne gases. Depending on the
cross-sensitivity relationship, there may be a positive or negative impact on the reading.

The most commonly present gases that potentially cause interference problems are listed in Table 4,
Interfering Gases and Table 5, Cross Interference Table (Section 8.3, Interference Table).

The presence of cross-interference gases in an area does not preclude the use of th is sensor technology. The
sensor could experience a false high or false lo w r eading should exposure occur.

Cross-Interference Data Table

The gases typically found in industrial environments that may cause a cross-interference response on Detcon
toxic gas sensors are listed in Table 5 (Section 8.3, Interferenc e Tabl e). Review Table 5 for the correct gas and
then scan across the list for possible interference gases. Determine the magnitude of cross-interference that
may occur.

2.4 Sensor Mounting

The DM-100 should be vertically oriented so that the sensor points straight downward. The explosion-proof
enclosure or junction box is typically mounted on a wall or pole (Figure 11). Detcon provides a selection of
standard junction boxes in both Aluminum and Stainless Steel.

NOTE

NOTE

underneath the J-Box’s 1/4" mounting holes to move the wireless sensor assembly away

the sensor is mounted in a severe or harsh environment. Metal-on-metal contact must be
maintained to provide a solid electrical ground path. If Teflon Tape is used the Sensor must

DM-100 Instruction Manual Rev. 3.5 Page 8 of 41

Model DM-100

8-32 tapped
ground point

4.35"

3

4

NPT Ports

6.1"

5.5"

1

4

" mounting holes

Wall

(or other

mounting surface)

Splash Guard Adapter

Splash Guard

2"

DETCON, INC.

H2S

100 PPM

DM-100

ITM Assembly

13.75" Typ.

9.625" Typ.

Use spacers to move

sensor assembly away

from wall at least 0.5".

Spacer

If a conduit run exits the secondary port, repeat the installation technique shown in
Figure 12.

When mounting on a pole, secure the Junction Box to a suitable mounting plate and attach the mounting plate
to the pole using U-Bolts. (Pole-Mounting brackets for Detcon Junction Box’s are available separately.)

Figure 11 Typical DM-100 Sensor Assembly and Mounting Dimensions

2.5 Electrical Installation

The Sensor Assembly should be installed in accordan ce with local electrical codes. The sensor assemblies are
CSA/NRTL approved (US and Canada) for Class I, Division 1, Groups A, B, C, & D area classifications, and
are ATEX Approved for Class I, Zone 1, Group IIC area classifications.

Proper electrical installation of the gas sensor is critical for conformance to Electrical Codes and to avoid
damage due to water leakage. Refer to Figure 8 and Figure 12 for proper electrical installation.

NOTE

In Figure 12, the drain allows H
assembly. The electrical seal fitting is requ ired to meet the National Electrical Code per NEC Article 500-3d
(or Canadian Electrical Code Handboo k, Part 1, Section 18-154). Requirements for locations of electrical seal s

O condensation inside the conduit run to safely drain away from the sensor

2

are covered under NEC Article 501-5. Electrical s eals act as a secondary seal to prevent water from enterin g
the wiring terminal enclosure. However, they are not designed to provide an absolute watertight seal,
especially when used in the vertical orientat i on.

DM-100 Instruction Manual Rev. 3.5 Page 9 of 41

Model DM-100

For products utilizing the aluminum junction box option, the conduit seal shall be placed at

nction box option, the conduit seal shall be placed within 18" of the

enclosure. Crouse Hinds type EYS2, EYD2 or equivalent are suitable for this purpose.

The Detcon Warranty does not cover water damage resulting from water leaking into the
enclosure.

Drain

Conduit

"T"

EYS Seal Fitting

DETCON, INC.

H2S

100 PPM

DM-100

Model 100

Any unused ports should be blocked with suitable 3/4" male NPT plugs. Detcon supplies one

an appropriate male plug of like construction material.

Shielded cable is required for installations where cabl e trays or conduit runs include high

highly recommended in these cases.

NOTE

The supply of power should be from an isolated source with over-current protection.

NOTE

NOTE

the entry to the junction box (see Figure 12 as an example). For products utilizing the
stainless steel ju

Figure 12 Typical Installation

NOTE

3

/4" NPT male plug with each J-box enclosure. If connections are other than 3/4" NPT, use

2.6 Field Wiring

Detcon Model DM-100 sensor assemblies requ ire two conductor connections between power supplies and host
electronic controller’s 4-20mA input. Wiring designations are PWR and mA (sensor signal).

NOTE

voltage lines or other possible sources of induced interference. Separate conduit runs are

DM-100 Instruction Manual Rev. 3.5 Page 10 of 41

Model DM-100

A 6-32 or 8-32 threaded exterior ground point is provided on most junction boxes for an

strap must be used to ensure that the senso r is electrically grounded.

JP1

1-2 – Battery installed

2-3 – Display only

Terminal Connections – with Junction Box Option

Do not apply System power to the sensor until all wiring is properly terminated.

CAUTION

Refer to Section 2.7, Initial Start Up.

1. Remove the junction box cover.

2. If the sensor has the Display optio n installed, unplug the display from the terminal board by pulling the

display out of the junction box. The display option plugs directly into the terminal board’s Beau
Connector.

3. Observing correct polarity, terminate th e 2-conductor power and 4-20mA field wiring (+ and mA) at the

terminal board connector J1 (4-20mA Out) on the Standard Terminal Board shown in Figure 7, or J7
(PWR and MA) on the Display Terminal Board shown in Figure 8.

4. Trim and cap all exposed wire leads if they are n ot permanently landed in the terminal board.

5. The sensor should be connected to J2, labeled SENSOR on the Standard Terminal Board, and J6, labeled

SENSOR, on the Display Terminal Board. On the Standard Terminal Board, the wiring from the sensor
should match the silkscreen on the terminal board: R–Red, BK–Black, GN-Green, BU–Blue, and W–
White. On the Display Terminal Board the wiring should be: Red-PWR, Black-GND, White–A, Blue–B
(Green is not connected).

6. On the Display Terminal Board other connectors are provided for factory installed options. The options

ordered will dictate if, and what connectors are used. The display option is plugged into the Beau
connector (J3) for a DM-100 with just the display option added. Other options are covered in the
associated manual for those options.

7. If a display was removed in Step 2, re-install the display by plugging it back into the terminal board.

8. Replace the junction box cover after initial startup.

NOTE

external ground. If the Sensor Assembly is not mechanically grounded, an external ground

2.6.1 DM-100 Display Terminal Board Settings

The Model 100 Display Terminal Board contains a jumper that must be configured properly for the board to
operate correctly. The jumper is normally configured at the factory and should not be changed. Misplacement
of the jumper may cause the sensor to become inoperative.

Table 2 Model 100 Terminal Board Jumper

2.7 Initial Start Up

2.7.1 Toxic Gas Sensors

Upon completion of all mechanical mounting and termination of all field wiring, apply system power in the
range of 11-26VDC (24VDC typical) and observe the following normal conditions:

DM-100 Instruction Manual Rev. 3.5 Page 11 of 41

Model DM-100

NOTE

The 4-20mA signal is held constant at 4mA for the first two minutes after power up.

Calibration gas generators using perm tubes or electrochemical sources may be used in
place of span gas cylinders.

The cover of the junction box will need to be removed if there is not a loop powered
display. The area may need to be de-classified.

1. If the Loop Powered Display option is installed, the display should read 0.0 upon power up. If a Loop

Powered Display is not installed on the sensor, set a DVM to measure millivolts, and connect it across
TP1 and TP2 on the terminal board. The DVM will read the voltage drop across a 10Ω resistor. The
resistor develops a 10mV voltage drop per 1mA of current. Thus a reading of 40mV on a DVM equals
4mA of current.

2. A temporary upscale reading may occur as t he sensor stabilizes. This upscale reading wi ll decrease to

"0" ppm (40mV on the DVM) within 1 to 2 minutes of power-up, assuming there is no gas in the area
of the sensor.

3. Sensors cells that use a bias voltage require a lo nger time to stabilize. This can vary between 1 and 24

hours depending on the sensor type and range. Biased sensors includ e NH

, NO, HCl, and VOC gases

3

(ethylene oxide, ethylene, methanol, formaldehyde….etc).

Initial Operational Tests

After a warm up period of 1 hour (or when zero has stabilized), the sensor should be checked to verify
sensitivity to the target gas.

Material Requirements

• Detcon PN 613-120000-700 700 Series Splash Guard with integral Cal Port and Calibration Wind

Guard (P/N 943-000000-000) -OR-

• Detcon PN 943-000006-132 Threaded Calibration Adapter - OR -

• Detcon PN 943-01747-T05 Teflon Calibration Adapter for highly reactive gases

• Detcon Span Gas; 50% of range target gas in balance N2 or Air at fixed flow rate between

200-500cc/min (500cc/min is preferred)

• DVM (if a loop powered display is not installed)

NOTE

NOTE

1. If the sensor has a loop power display installed, the display should read "0". If a DVM is used to

measure the 4-20mA output, set the DVM to measure millivolts and connect the leads across TP 1 and
TP2 on the terminal board. The DVM should read 40±2mV.

2. Attach the calibration adapter to the Splash Guard adapter or connect tubing to integral cal port. It is

recommended that the Wind Guard (PN 943-000000-000) in installed over the Splash Guard during
calibration. Apply the test gas at a controlled flow rate of 200-500cc/min (500cc/min is the
recommended flow). If the sensor has a loop power display attached the reading should increase to
50% of full range (if the range is 100, the display should read 50). Observe that the DVM increas es to
a level near that of the applied calibration gas value. Typically this would be 50% of full range, a
reading of 120±2mV (12mA).

3. Remove test gas and observe that, if the sensor has a loop power display installed, the display

decreases to "0". If a DVM is used the DVM reading should decrease back to 40mV (4mA).

DM-100 Instruction Manual Rev. 3.5 Page 12 of 41

Model DM-100

The cover of the junction box will need to be removed if there is not a loop powered
display. The area may need to be de-classified.

4. If a calibration adapter was used during these tests, remove them from the unit, and re-install the

Splash Guard. If the wind guard was used, remove the wind guard.

Initial operational tests are complete. DM-100 toxic gas senso rs are factory calibrated prior to shipment, and
should not require significant adjustment on start up. Howev er, it is recommended that a complete calibr ation
test and adjustment be performed 16 to 24 hours after power-up. Refer to zero and span calibration instruction s
in Section 3.3, Calibration.

2.7.2 O2 Deficiency Sensors

Upon completion of all mechanical mounting and termination of all field wiring, apply system power in the
range of 11-30VDC (24VDC typical) and observe the following normal conditions:

If the sensor has a loop power display installed, the disp lay should read close to 20.9%. If a DVM is used to
measure the 4-20mA output, set the DVM to measure millivolts and co nnect the leads across T P1 and TP2 on
the terminal board. The DVM should read 173.7±2mV.

The reading should stabilize within 1 to 2 minutes of power-up (assuming a ‘normal’ ambient O
concentration).

Initial Operational Tests

2

After a warm-up period of 5 minutes the sensor should be checked to verify response to O

deficiency.

2

Material Requirements

• Detcon PN 613-120000-700 700 Series Splash Guard with integral Cal Port and Calibration Wind

Guard (P/N 943-000000-000) -OR-

• Detcon PN 943-000006-132 Threaded Calibration Adapter - OR -

• Detcon PN 943-01747-T05 Teflon Calibration Adapter for highly reactive gases

• Detcon Zero Gas: 100% N2 at fixed flow rate of 200-500cc/min

• DVM (if a loop powered display is not installed)

NOTE

1. Attach the calibration adapter to the th readed sensor housing or connect tubing to the integral cal port.

Apply the test gas at a controlled flow rate of 200-500cc/min (500cc/min is the recommended flow).

2. If the sensor has a loop power display installed, the display reading should drop to "0". If a DVM is

used to measure the 4-20mA output, set the DVM to measure millivolts and co nnect the leads across
TP1 and TP2 on the terminal board. The DVM should read 40±2mV.

3. Remove test gas and calibration adapter. If the sensor has a loop power display instal led, the display

should return to a reading of 20.9%. The DVM should return to a reading of 173.7mV (17.37mA).

Initial operational tests are complete. DM-100 O

deficiency sensors are factory calibrat ed prior to shipment,

2

and should not require significant adjustment on start up. A complete calibration test and adjust ment should be
performed 16 to 24 hours after power-up. Refer to zero and span calibration instructions in Section 3.3,
Calibration.

DM-100 Instruction Manual Rev. 3.5 Page 13 of 41

Model DM-100

DETCON, INC.

H2S

100 PPM

DM-100

Program 1

Program 2

3. Operation

The Operator Interface of the Model 100 Series gas sensors is accomplished via two internal magnetic
switches located on the left and the right of the sensor (Figure 14). The two switches, labeled PGM1 and
PGM2, allow for complete calibration of the sensor. The addition of the Loop Powered Display allows the
ability to calibrate the sensor without the need to de-classify the area or the use of hot permits.

Figure 13 Magnetic Programming Tool

The magnetic programming tool (Figure 13) is used to operate the magnetic switches. Switch action is defined
as momentary contact and 3-second hold. Hold time is defined as the time from the point when the mag net is
placed in close proximity with the switch. For momentary contact the programming magnet is briefly held
over a switch location. The location of PGM1 and PGM2 are shown in Figure 14.

Figure 14 Magnetic Programming Switches

3.1 Normal Operation

In normal operation, the mA output will be the current sensor reading. In normal operation, the 4-20mA
current output linearity corresponds with the full-scale range. If the DM-100 Display option is add ed to the
sensor, the display continuously shows the current sensor reading in ppm or % by volume, which will
normally appear as "0". If the sensor is actively experiencing any diagnostic faults, the mA output will be
taken to 1.2mA to designate a fault to the controller. The DM-100 Display will display an error code to signify
a fault. E rror codes are noted by Fxx, where F is Fault and xx is an error code. Error codes are def ined in
Section 5, Troubleshooting Guide .

3.2 Auto Span Level Adjustment

This procedure can only be achieved if the unit has a display.

1. In normal operation, hold the programming magnet over PGM2 for a minimum of 3 seconds to set the

Auto span level.

DM-100 Instruction Manual Rev. 3.5 Page 14 of 41

Model DM-100

The zero gas source may be zero air o r N2 for toxic sensors, but must be pure N2 (99.99%)
for O2 deficiency sensors.

The Calibration Wind Guard must be used when the Splashguard Adapter with integral Cal
Port is used. Failure to use the Calibration Wind Guard may result in an inaccurate
AutoZero calibration.

The cover of the junction box will need to be removed if there is not a loop powered
display. The area may need to be de-classified.

2. SET AUTO SPAN will scroll across the display to indicate entry into the routine.

3. When adjustments can be made, the display will scroll ADJUST AUTO SPAN. Swipe PGM2 to

adjust the AutoSpan Level up. Swipe PGM1 to adjust it down.

4. If no action is taken within 5 seconds, the display will scroll AUTO SPAN NOT SAVED to indicate

a value was not saved. The unit will then return to normal operation.

5. If changes are made, the display will reflect the adjustments.

6. A 2 second hold on PGM1 or PGM2 will save the level. The display will scroll AUTO SPAN

SAVED to indicate that the value was saved and the unit will return to normal operation.

7. If no hold is placed on PGM1 or PGM2, the level will revert to the previous value. The display will

scroll AUTO SPAN NOT SAVED to indicate that th e value was not saved and the unit will return to
normal operation.

3.3 Calibration

Zero and span calibration should be performed on a routine basis (quarterly minimum) to ensure reliable
performance. If a sensor has been exposed to any de-sensitizing gases, or to very high over-range combustible
gas levels, re-calibration should be considered. Unless otherwise specified, span adjustment is recommended at
50% of the full scale range.

3.3.1 Zero Calibration

The zero calibration is used to zero the sensor. Zero calibration should be performed periodically or as
required. Zero calibration should be considered after periods of over-range target gas exposure. Local ambient
air can be used to zero calibrate a toxic gas sensor as long as it can be confirmed that it c ontains no target or
interference gases. If this cannot be confirmed then a zero air or N
used for zero calibration of the O

deficiency sensors.

2

Material Requirements:

cylinder should be used. Pu re N2 must be

2

• Detcon PN 327-000000-000 Programming Magnet

• Detcon PN 613-120000-700 700 Series Splash Guard with integral Cal Port and Calibration Wind

Guard (P/N 943-000000-000) -OR-

• Detcon PN 943-000006-132 Threaded Calibration Adapter - OR -

• Detcon PN 943-01747-T05 Teflon Calibration Adapter for highly reactive gases

• Detcon PN 942-001123-000 Zero Air cal gas (or use ambient air if no target gas is present).

• Detcon PN 942-640023-100 Nitrogen 99.99%

• DVM (if a loop powered display is not installed)

NOTE 1:

NOTE 2:

NOTE 3:

DM-100 Instruction Manual Rev. 3.5 Page 15 of 41

Model DM-100

For O2 deficiency sensors N2 (99.99%) MUST be applied at a flow rate o f 500cc/min for
a time period of 3 to 5 minutes to successfully zero calibrate the sensor .

For O2 deficiency sensors N2 (99.99%) MUST be applied at a flow rate o f 500cc/min for
a time period of 3 to 5 minutes to successfully zero calibrate the sensor.

NOTE

If no action is taken unit returns to normal operation after time expires, 10 seconds.

3.3.1.1 Display Not Installed

1. If a DM-100 Display is not installed on the sensor, set a DVM to measure milliv olts, and connect it

across TP1 and TP2 on the terminal board. The DVM will read the voltage drop across a 10Ω resistor.
The resistor develops a 10mV voltage drop per 1mA of current. Thus a reading of 40mV on a DVM
equals 4mA of current.

2. For toxic sensors, if the ambient air is known to contain no target gas content, then it can be used for

zero calibration. If a zero gas cal cylinder is going to be used, attach the calib ration adapter and set
flow rate of 200-500cc/min (500cc/min is the recommended flo w r ate) and let the sensor purge for 1 to
2 minutes before zeroing the sensor. For O

deficiency sensors, apply N2 at a set flow rate of

2

500cc/min for 3 to 5 minutes before zeroing the sensor.

NOTE:

3. From Normal Operation, hold the programming magnet over PGM1 for 3 seconds. The reading will

dip momentarily to 2mA (20mV on the meter). The reading will then return to 4ma. (The ideal reading
for zero is 4.03mA or 40.3mV.)

4. Observe the reading for a minute or so to ensure that the reading does not drift.

5. If zero gas was used, remove the gas from the sensor.

3.3.1.2 With Display

1. For toxic sensors, if the ambient air is known to contain no target gas content, then it can be used for

zero calibration. If a zero gas cal cylinder is g oing to be used, attach the calibration adapter and set
flow rate of 200-500cc/min (500cc/min is the recommended flow rate) and let the sensor purge for 1 to
2 minutes before zeroing the sensor. For O
500cc/min for 3 to 5 minutes before zeroing the sensor.

deficiency sensors, apply N2 at a set flow rate of

2

NOTE:

2. From Normal Operation, hold the programming magnet over PGM1 for 3 seconds. The display will

scroll 1-ZERO…2-SPAN for 10 seconds.

3. Hold PGM1 to start Auto Zero routine, ZERO IN PROGRESS… will scroll across the display. Output

current from the sensor will drop to 3.5mA.

4. Observe the reading for a minute or so to ensure that the reading does not drift.

5. If zero gas was used, remove the gas from the sensor.

DM-100 Instruction Manual Rev. 3.5 Page 16 of 41

Model DM-100

The cover of the junction box will need to be removed if there is not a loop powered
display. The area may need to be de-classified.

A target gas concentration of 50% of range is strongly recommended. This should be
applied at a controlled flow rate of 200 to 500cc/min, with 500cc/min being the

levels of 10% to 100% of range.

The Calibration Wind Guard must be used when the Splashguard Adapter with integral Cal

Guard may result in an inaccurate

AutoZero calibration.

NOTE 4:

Contact Detcon for ordering information on Span Gas cylinders.

Ambient air should be used to calibrate O2 deficiency sensors as long as the oxygen
concentration is confirmed to be 20.9%.

Cross-calibration for sp an by use of other gases is not advised and should be confirmed by
Detcon.

3.3.2 Span Calibration

Span Calibration is used to adjust th e span of the sensor and should be performed periodically or as required.
Span calibration should be considered after periods of over-range target gas exposure. Unless otherwise
specified, span adjustment is recommended at 50% of range.

Material Requirements:

• Detcon PN 327-000000-000 Programming Magnet

• Detcon PN 613-120000-700 700 Series Splash Guard with integral Cal Port and Calibration Wind

Guard (P/N 943-000000-000) -OR-

• Detcon PN 943-000006-132 Threaded Calibration Adapter - OR -

• Detcon PN 943-01747-T05 Teflon Calibration Adapter for highly reactive gases

• Detcon Span Gas (See Detcon for Ordering Information). Recommended span gas is 50% of range

with target gas. Other suitable span gas sources containing the target gas in air or N2 balance are
acceptable.

• DVM (if a loop powered display is not installed)

NOTE 1;

NOTE 2:

recommended flow rate. Other concentrations can be used if they fall within allowable

NOTE 3:

Port is used. Failure to use the Calibration Wind

NOTE 5:

NOTE 6:

Span consists of applying the correct gas concentration at the correct flow rate, and adjusting the sensor for the
proper output. The recommendation for span gas concentration is 50% of range. If a span gas containing the
recommended concentration is not avail able, other concentrations may be used as long as they fall between
10% and 100% of range.

3.3.2.1 Display Not Installed

1. Set a DVM up to measure millivolts, and connect it across TP1 and TP2 on the terminal board. The

DVM will read the voltage drop across a 10Ω resistor. The resistor develops a 10mV voltage drop per
1mA of current. Thus a reading of 40mV on the DVM equals 4mA of current.

2. Install the Calibration Wind Guard, or the appropriate calibration adapter.

DM-100 Instruction Manual Rev. 3.5 Page 17 of 41

Model DM-100

12mA and 50% of full range are based on the use of a span gas concentration of 50%. If a

adjust the mA reading to the target set-point.

For O2 deficiency sensors, N2 (99.99%) MUST be applied at a flow rate of 500cc/min for

autospan cycle is complete. If not done properly a clearing fault will occur.

For O2 deficiency sensors, N2 (99.99%) MUST be applied at a flow rate of 500cc/min for

autospan cycle is complete. If not done properly a clearing fault will occur.

Any fault during the AutoSpan will cause the current output from the sensor to drop to

1.2mA (12mV).

3. From normal operation, hold the programming magnet over PGM2 for at least 3 seconds. Apply the

span calibration test gas for toxic gas sensors at a flow rate of 200-500cc/min (500cc/min is the
recommended flow rate). The DVM reading will remain at 2mA or "0" for 2 minutes.

4. When the 2 minute wait is complete, the reading will increase to a level that corresponds to the level

of gas the plug-in sensor is detecti ng. There is a 30 second period to decide if the reading needs to be
adjusted. If the reading matches the level of gas applied continue to Step 7.

5. To adjust the reading, hold the programming magnet over PGM2. The reading will also start to

increase. Continue to hold the programming magnet over PGM2 to make the current increase, or hold
the magnet over PGM1 to make the current decrease. Use PGM1 and PGM2 to adjust the output to
match the target gas set-point. Assuming 50% of full range was applied, adjust the reading to 12mA
(120mV on the DVM).

NOTE

different concentration of span gas is used, the mA r ead in g wil l need to be cal culat ed. I.E. if
a 25% concentration span gas is used the reading would be 8mA. Use the magnetic tool to

6. When the correct adjustment has been made, wait 15 seconds without holding the programming

magnet over either PGM1 or PGM2. The reading will momentarily decrease about 20% and then
return to the target reading. This indicates that the span cal ibration point has been successfully saved.
If a lack of proper signal level change is internally detected th e sensor will immediately go into fault.
The reading will go to 1.2ma (12mV). Only a successful re-calibration will clear this fault (Section 5,
Troubleshooting Guide).

NOTE:

2 to 3 minutes until the sensor reading clears below 2.5% volume O2. At this point the

7. Remove the span gas and calibration adapter (or calibration wind guard), or for O

apply N

at a set flow rate of 500cc/ min. On the DVM, the reading will fall from the repo rted span

2

deficiency sensors,

2

level to 4mA (40mV). The sensor now allows 5 minutes for the reading to clear below 10% of full
scale range (5.6mA). If the reading does not meet the cleari ng test cr iteria the senso r will go into fault.
The reading will go to 1.2ma 12Mv). Only a successful re-calibration will clear this fault (Section 5,
Troubleshooting Guide).

NOTE:

2 to 3 minutes until the sensor reading clears below 2.5% volume O2. At this point the

8. Span calibration is complete. If the Splash Guard was removed for calibration, re-install the Splash

Guard.

NOTE

3.3.2.2 Display Installed

1. Install calibration adapter or wind guard.

2. From Normal Operation, hold the programming magnet over PGM1 for 3 seconds. The display will

DM-100 Instruction Manual Rev. 3.5 Page 18 of 41

scroll 1-ZERO…2-SPAN.

Model DM-100

For O2 deficiency sensors, N2 (99.99%) MUST be applied at a flow rate of 500cc/min for

autospan cycle is complete. If not done properly a clearing fault will occur.

For O2 deficiency sensors, N2 (99.99%) MUST be applied at a flow rate of 500cc/min for

autospan cycle is complete. If not done properly a clearing fault will occur.

Any fault during the AutoSpan will cause the current output from the sensor to drop to

3.25mA.

3. Hold PGM2 for three seconds an d Auto span routine is executed and APPLY XXXXX UUU GGG is

scrolled across the display. W here XXXXX represent t he auto span level, UUU represen t the units (%
or PPM), and GGG represent the gas type. Output current from the sensor will drop to 3.5mA.

4. Apply the span calibration test gas for to xic gas senso rs at a flow rate o f 200-500cc/min (500cc/min is

the recommended flow rate). As the sensor signal begins to increase the display will switch to XX
reading as the ITM shows the sensor’ s "as found" respon se to th e span gas pr esented . If it f ails to meet

1

the minimum in-range signal change criteria within 2

/2 minutes, the display will report a Range Fault

fault code and the ITM will return to normal operation, aborting the AutoSpan sequence. The ITM will
continue to report a Range Fault and will not clear the fault until a successful AutoSpan is completed.

5. Assuming acceptable sensor signal change, after 1 minute the reading will auto-adjust to the

programmed AutoSpan level. During the next 30 seconds, the AutoSpan sequence checks the sensor
for acceptable reading stabil ity. If the senso r fails th e stab ility check, the read ing is re-adjusted back to
the AutoSpan level and the cycle repeat s until the stability check is passed. Up to three additional 30­second stability check periods are allowed bef ore the display scrolls a Stability Fault fault code and
the sensor will return to normal operation, aborting the AutoSpan sequence. The sensor will continue
to report a Stability Fault and will not clear the fault until a successful AutoSpan is completed.

NOTE:

2 to 3 minutes until the sensor reading clears below 2.5% volume O2. At this point the

6. Remove the span gas source and calibration adapter, or for O

deficiency sensors, apply N2 at a set

2

flow rate of 500cc/min. The display will toggle between reporting a live reading and "REMOVE
GAS" as it clears toward "0". When the reading clears below 10% of range, the display will scroll
Span Complete and will revert to normal operation. If the sensor fails to clear to less than 10% in less
than 5 minutes, a Clearing Fault fault code will be displayed and the sensor will return to normal
operation, aborting the AutoSpan sequence. The sensor will continue to report a Clearing Fault and
will not clear the fault until a successful AutoSpan is completed.

NOTE:

2 to 3 minutes until the sensor reading clears below 2.5% volume O2. At this point the

NOTE

3.4 Fault Diagnostic/Failsafe Feature

If the ITM should incur a fault, the ITM will drop the mA output to 1.2mA (without display) or 3.25mA (with
display). This can occur if the ITM;

• detects a problem with the sensor,

• detects that there is no sensor cell connected, or

• detects an internal ITM fault.

The ITM will hold the fault current output until the problem is resolved. If the DM-100 Display is installed,
the display will show an error code. The error codes are defin ed in Section 5, Troubleshooting Guide.

DM-100 Instruction Manual Rev. 3.5 Page 19 of 41

Model DM-100

It is not necessary to remove power while changing the plug-in toxic gas sensor in order to
maintain area classification, since it is intrinsically safe.

NOTE

Only replace the plug-in sensor with an autho rized DM-100 family of gas sensors.

NOTE

One turn will suffice. Do not remove cap head screw completely.

4. Service and Maintenance

Calibration Frequency

In most applications, monthly to quarterly span calibration intervals will assure reliable detection. However,
industrial environments differ. Upon initial installation and commissioning, close frequency tests should be
performed, weekly to monthly. Test results should be recorded and reviewed to determine a suitable
calibration interval.

Visual Inspection

The Sensor should be inspected annually:

• Inspect the sensor for signs of corrosion, pitting, and water damage.

• Remove the Splash Guard and inspected it for blockage, broken, cracked, or missing pieces.

• For H2S Sensor assemblies, inspect DM-100 Bottom Housing Assembly with integral filter (PN 602-

003552-100) for blockage of filter material.

• Inspect inside of the Junction Box for signs of water accumulation, signs of corrosion.

• Check wiring to ensure there are no loose or pinched wires and all connections are clean and tight.

Condensation Prevention Packet

A moisture condensation prevention packet (PN 960-202200-000) should be installed in every explosion proof
Junction Box. The prevention packet will prevent the internal volume of the J-Box from condensing and
accumulating moisture due to day-night humidity changes. This packet provides a critical function and should
be replaced annually.

4.1 Replacement of Plug-in Sensor

NOTE

1. Use a

2. Unthread and remove the Splash Guard Adapter and Splash Guard from the ITM.

3. Gently pull the plug-in sensor out of the ITM. Orient the new plug-in sensor so that it matches with the

4. Thread the Splash Guard Adapter onto the ITM to a snug fit and tighten the locking cap head screw

5. Check and perform zero calibration and span calibration as per Section 3.3, Calibration.

1

/8" Allen wrench to release the locking cap head screw that locks the ITM and Splash Guard

Adapter together.

female connector pins. Use the alignment marks provided to assure alignment is correct. When
properly aligned, press the sensor in firmly to make the proper connection.

1

using the

/8" Allen wrench. Reinstall the Splash Guard.

DM-100 Instruction Manual Rev. 3.5 Page 20 of 41

Model DM-100

It is necessary to remove power to the Junction box while changing the ITM in order to
maintain area classification.

It is necessary to remove power to the Junction Box while changing the Model 100
Terminal Board in order to maintain area classification.

4.2 Replacement of ITM

1. Remove the power source to the sensor assembly. Disconnect all sensor wire connections at the

Junction Box Terminal Board taking note of the wire connections.

NOTE

2. Use a wrench and the wrench flats provided at the top sectio n o f the ITM an d unth read t he ITM u nt il it

can be removed.

3. Use a

4. Unthread and remove the Splash Guard Adapter and Splash Guard from the ITM. These will be re-

5. Gently remove the plug-in toxic gas sensor from the old ITM and install it in the new ITM. Orient the

6. Thread the Splash Guard Adapter onto the new ITM until snug, tighten the locking cap head screw and

7. Feed the sensor assembly wires through the

8. Check and/or perform Zero Calibration and Span Calibration (Section 3.3, Calibration).

1

/8" Allen wrench to release the locking cap head screw that locks the ITM and Splash Gu ard

Adapter together (One turn will suffice - Do not remove setscrew completely).

used with the new ITM.

plug-in sensors so that it matches the female connecto r pins on the new ITM and press the sensor in
firmly to make proper connection.

reinstall Splash Guard.

3

/4" female NPT mounting hole and thread the assembly
into the J-box until tight and the ITM faces toward the front access point. Use the locking nut to secure
the ITM in this position. Connect the sensor assembly wires to the terminal board inside the Jun ction
Box (Section 2.6).

4.3 Replacement of the Model 100 Terminal Board

1. Remove the power source to the sensor assembly.

NOTE

2. Remove the junction box cover and remove the Loop Powered Display, if one is installed.

3. Remove the power connector on the terminal board.

4. Unplug all other connectors from the terminal board, noting where they are plugged into.

5. Remove the four 6-32 screws holding the terminal board to the base of the junction box and remove

the terminal board.

6. Install the new terminal board using the four 6-32 screws removed in Step 5.

7. If the unit has the DM-100 Display Terminal Board, ensure that the jumper on the terminal board is set

properly (Section 2.6.1, DM-100 Display Terminal Board Settings).

8. Re-connect the sensor connector to the terminal board and all other connections removed in Step 4.

DM-100 Instruction Manual Rev. 3.5 Page 21 of 41

Model DM-100

9. Reconnect the power connector to the terminal board.

10. Re-install the DM-100 Display, if one was installed.

11. Reinstall the junction box cover, and restore power to the sensor.

12. Check operation of sensor assembly (Section 2.7, Initial Start Up).

DM-100 Instruction Manual Rev. 3.5 Page 22 of 41

Model DM-100

5. Troubleshooting Guide

If the ITM detects any functional errors the ITM will bring the mA output to 0mA and hold it there until the
problem has been resolved. If the unit has a Display, the display will show an error code. Error codes are
displayed as FLXX where XX is the actual error code.

The Display Error Codes are:
FL01 Auto Span Fault
FL05 ITM Memory Fault
FL06 Processor Fault
FL07 Clearing Fault
FL08 Stability Fault
FL09 Range Fault
FL10 Sensor Fault
FL11 Zero Fault
FL12 Sensor Fault 2

AutoSpan Fault (FL01)
This fault occurs when a span calibration has not been performed in the last 180 days. Execute a span

calibration to clear this fault.

Transmitter Not Responding (FL05, FL06)

• Verify condulet has no accumulated water or abnormal corrosion.

• Verify required DC power is applied to correct terminals. Swap with a known-good ITM to determine

if ITM is faulty.

Clearing Problem (FL07)

• The sensor must recover to < 10% of range in < 5 min after Span calibration is complete. Verify the

cal gas is being removed at the appropriate time during span calibration.

• Background gas may be present. Use bottled air (zero air or N

) if there is a known continuous

2

background level.

• Check validity of span gas using pull tube or other means (check MFG date on cal gas cylinder).

Use proper cal gas regulators and tubing for highly corrosive gases.

• Check for obstructions affecting cal gas hitting sensor face, including being wet, blocked, or corroded.

H2S sensors assemblies use 100 Series Bottom Housing Assembly with integral filter. Clean or replace
if necessary.

• Replace the plug-in toxic sensor.

Stability Fault (FL08)

• Verify the cal gas cylinder is not close to being empty.

• Check validity of span gas using pull tube or other means, verify MFG date on cal gas cylinder. Use

proper cal gas regulators and tubing for highly corrosive gases.

• If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can

compromise span gas delivery

• Check for obstructions affecting cal gas hitting sensor face, including being wet, blocked, or corroded.

H2S sensors assemblies use 100 Series Bottom Housing Assembly with integral filter. Clean or replace
if necessary.

• Replace the plug-in toxic sensor.

DM-100 Instruction Manual Rev. 3.5 Page 23 of 41

Model DM-100

Range Fault (FL09)

• Check validity of span gas with regulator and sample tubing in place using pull tube or other means

(check MFG date on cal gas cylinder). Use proper cal gas regulators and tubing for highly corrosive
gases (HF, HCI, Cl2, NH3, HBR, F2, etc.)

• Check for obstructions affecting cal gas hitting sensor face (including being wet, blocked, or

corroded). H2S sensors assemblies use DM-100 Bottom Housing Assembly with integral filter. Clean
or replace if necessary.

• If using Splashguard with Integral Cal Port, must use Calibration Wind Guard or air movement can

compromise span gas delivery

• Verify there is no background cross interference gases.

• Replace the plug-in toxic sensor.

Sensor Fault (FL10)

• Verify that the sensor cell is plugged into the ITM.

• Swap cell with a known good cell to see if the fault clears.

• Replace the sensor cell.

Zero Fault (FL11)

• The sensor zero baseline may have drifted lower. Perform Zero Calibration. Use Zero Air or N

(Section 3.3.1, Zero Calibration). Allow more time for zero stabilization if usuing a biased sensor type.

• Execute successful Span Calibration (Section 3.3.2, Span Calibration). Replace plug-in toxic sensor if

error continues.

Unstable Output/Sudden Spiking

• Verify that the field wiring is properly shielded and grounded.

• Verify that the power source is stable.

• Contact Detcon to optimize shielding and grounding.

• Add Detcon’s RFI Protection Circuit Accessory (PN 975-343002-007) if problem is proven RFI induced.

Nuisance Alarms

• Check condulet for accumulated water and abnormal corrosion on terminal board. If nuisance alarms

are happening at night, suspect condensation in condulet.

• Add or replace Detcon’s Condensation Prevention Packet (PN 960-202200-000).

• Investigate the presence of other target gases that are causing cross-interference signals.

• Determine if cause is RFI induced.

Unreadable Display (If a DM-100 display is installed.)

• If due to excessive sunlight, install a sunshade to reduce glare.

• Replace Display Assembly.

• Replace DM-100 Display.

source

2

Blank or Incorrect Reading on Display (If a DM-100 display is installed.)

• ITM has an internal fault, problem with display.

• Swap with a known-good ITM to determine if ITM is faulty.

DM-100 Instruction Manual Rev. 3.5 Page 24 of 41

Model DM-100

• Swap DM-100 Display Terminal Board with known good board.

• Swap DM-100 Display with known good display.

5.1 Smart Display Error Codes

These error codes are determined b y the smart display and must be rectified before normal operation of the
unit will continue.

ER01

Firmware Incompatible: Sensor firmware version is not compatible with the display.

ER02

Zero Range: The sensor has a range value of zero.

ER03

Zero Auto Span: The sensor has an Auto Span value of zero.

DM-100 Instruction Manual Rev. 3.5 Page 25 of 41

Model DM-100

6. Customer Support and Service Policy

Detcon Headquarters
Shipping Address: 4055 Technology Forest Blvd, The Woodlands, Texas 77381
Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067
Phone: [phone]
Fax: [phone]

• www.detcon.com

• [e-mail]

• [e-mail]

All Technical Service and Repair activit ies should be handled by the Detcon Service Department via phone,
fax or email (contact information given above). RMA numbers should be obtained from the Detcon Service
Department prior to equipment being returned. For on-line technical service, have the model number, part
number, and serial number of product(s) in question available.

All Sales activities (including spare parts purchase) should be handled by the Detcon Sales Department via
phone, fax or email (contact information given above).

Warranty Notice

Detcon Inc. warrants the Model DM-100 gas sensor to be free from defects in workmanship of material under
normal use and service for two y ears from the date of shipment on the tran smitter electronics. See Warranty
details in Section 7 DM-100 Sensor Warranty.

Detcon Inc. will repair or replace without charge any such equipment found to be defective during the
warranty period. Full determination of the nature of, and responsibility for, defective or damaged equipment
will be made by Detcon Inc. personnel.

Defective or damaged equipment must be shipped to the Detcon Inc. factory or representative from which the
original shipment was made. In all cases, this warranty is limited to the cost of the equipment supplied by
Detcon Inc. The customer will assume all liability for the misuse of this equipment by its employees or other
contracted personnel.

All warranties are contingent upon the proper use in the application for which the product was intended and
does not cover products which have been modified or repaired without Detcon Inc. approval, or which have
been subjected to neglect, accident, improper installation or application, or on which the original identification
marks have been removed or altered.

Except for the express warranty stated abov e, Detcon Inc. disclaims all warranties wit h regard to the products
sold. Including all implied warranties of merchantability and fitness and the express warrant ies stated herein
are in lieu of all obligations or liabilities on the part of Detcon Inc. for damages including, but not limited to,
consequential damages arising out of, or in connection with, the performance of the product.

DM-100 Instruction Manual Rev. 3.5 Page 26 of 41

Model DM-100

7. DM-100 Sensor Warranty

Plug-in Sensor Warranty

Detcon Inc. warrants, under normal intended use, each new intelligent plug-in sensor per the period specified
in the Warranty column of Table 3, Sensor Specific Data (Section 8.2, Sensor Specific Data) and under the
conditions described as follows:

• The warranty period begins on the date of shipment to the original purchaser.

• The sensor element is warranted to be free of defects in material and workmanship.

• Should any sensor fail to perform in accordance with published specifications within the warranty

period, return the defective part to Detcon, Inc., 4055 Technology Forest Blvd, The Woodlands, Texas
77381, for necessary repairs or replacement.

Terms & Conditions

• The original serial number must be legible on each sensor element base.

• Shipping point is FOB the Detcon factory.

• Net payment is due within 30 days of invoice.

• Detcon, Inc. reserves the right to refund the original purchase price in lieu of sensor replacement.

ITM Electronics Warranty

Detcon Inc. warrants, under intended nor mal use, e ach n ew Model 100 I TM to be fr ee from d efects in mater ial
and workmanship for a period of two years from the date of shipment to the original purchaser. All warranties
and service policies are FOB the Detcon facil ity located in The Woodlands, Texas.

Terms & Conditions

• The original serial number must be legible on each ITM.

• Shipping point is FOB the Detcon factory.

• Net payment is due within 30 days of invoice.

• Detcon, Inc. reserves the right to refund the original purchase price in lieu of ITM replacement.

DM-100 Instruction Manual Rev. 3.5 Page 27 of 41

Model DM-100

8. Appendix

8.1 Specifications

System Specifications

Sensor Type: Continuous diffusion/adsorption type

3-Electrode Electrochemical Sensor (2-E lectrode for O
Plug-in Replaceable Type

Sensor Life: 2 years typical

Measuring Ranges: 0-1ppm up to 0-10,000ppm (Toxic Gases)
0-1% up to 0-25% volume (O

)

2

Accuracy/ Repeatability: ±2% of full-range (other Toxic Gases)
±1% of full-range (O

)

2

Response Time: T90 < 30 seconds typical (Table 3)

Electrical Classification: CSA and US (NRTL)

Class I, Division 1, Groups A, B, C, D

ATEX
Class I, Zone 1, Group IIC
Ex d [ib] ib IIC T6

Approvals:

CSAUS, ATEX, CE Marking

C

Warranty: Electronics – 2 years
Sensor – (Table 3)

Environmental Specifications

)

2

Operating Temperature: -40°C to +50°C typical (Table 3)
Storage Temperature: -35°C to +55°C typical
Operating Humidity: 10-95% RH Continuous Duty (Table 3)

0-100% RH Short-Term Duration Only

Operating Pressure: Ambient ± 10%
Maximum Altitude 9000 Feet/3000 Meters

Air Velocity: 0-5 meters/second

Electrical Specifications

Input Voltage: 10-28 VDC

Power Consumption: Normal operation = 4 mA (0.1 watts @ 24VDC);

Maximum = 20 mA (0.5 watts @ 24VDC; 0.23 watts @ 11.5VDC)

RFI/EMI Protection: Complies with EN61326

DM-100 Instruction Manual Rev. 3.5 Page 28 of 41

Model DM-100

Response
(seconds)

O2

Oxygen

371-343400-025

T95<30

<5%signal loss/year

-20 to+50

15 to 90

2 years

C2H3O

Acetyldehyde

371-12EA00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

C2H2

Acetylene

371-12EG00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

C3H3N

Acrylonitrile

371-12EM00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

<2%signal

loss/month

<5%signal

loss/month

<2%signal

loss/month

C4H6

Butadiene

371-12EB00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

Carbon
Monoxide

<2%signal

loss/month

<2%signal

loss/month

Analog Output: Linear 4-20mA DC current
750 ohms maximum loop load @ 24VDC

1.2 mA All Fault Diagnostics (without display)
2mA Sensor in calibration (without display)

3.25mA All Fault Diagnostics (with display)

3.5mA Sensor in calibration (with display)
4-20 mA 0-100% full-scale
22 mA Over-range condition

Cable Requirements: Power/Analog: 2-wire shielded cable

Maximum distance is 13,300 feet with 14 AWG

Mechanical Specifications

Length: 8.5 inches (215mm) DM-100

13.25 inches (337 mm) DM-100 w/ XP Display

Width: 2.2 inches (55 mm) DM-100

6.0 inches (152 mm) DM-100

Weight: 2.5 lbs (1.2 Kg) DM-100

7.4 lbs (3.4 Kg) DM-100 w/ XP Display

3

Mechanical Connection:

/4" Male NPT threaded connection with locking nut (DM-100)

Two ¾” female NPT Threaded connections (DM-100 w/ XP Display)

Electrical Connection: four 18 gauge wire leads - 5.5" long (DM-100)
Input terminations for two 18 gauge wires (DM-100 w/ XP Display)

8.2 Sensor Specific Data

Gas GasName Part Number1

NH3

AsH3

Br2

CO

Cl2

ClO2 (>10ppm)

1

The last three digits of the Part Number are the range of the sensor cell. I.E. "-100" is a 100ppm range.

DM-100 Instruction Manual Rev. 3.5 Page 29 of 41

Ammonia

Arsine
Bromine

Chlorine
Chlorine Dioxide 371-777700-001 T90<60

Table 3 Sensor Specific Data

Time

371-171700-100 T90<90

371-191900-001 T90<60
371-747500-005 T90<60

371-444400-100 T90=30 <5%signal los s/year -40 to+50 15 to 90 3 years
371-747400-010 T90<60

SpanDrift

Temperatur

e Range °C

-20 to+50 15 to 90 2 years

-20 to+40 20 to 95 1.5 years

-20 to+50 15 to 90 2 years

-20 to+50 15 to 90 2 years

-20 to+50 15 to 90 2 years

Humidity

Range%

Warranty

Model DM-100

Response
(seconds)

ClO2
(<=10ppm)

<1%signal

loss/month

<5%signal

loss/month

C2H5OH

Ethanol

371-12EO00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

0

<2%signal

loss/month

C2H4

Ethylene

371-12ED00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

C2H4O

Ethylene Oxide

371-12EJ00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

F2

Fluorine

371-272700-001

T90<80

<5%signal loss/year

-10 to+40

10 to 95

1.5 years

CH2O

Formaldehyde

371-12EP00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

<1%signal

loss/month

<5%signal

loss/month

<2%signal

loss/month

<2%signal

loss/month

Hydrogen
Bromide

<3%signal

loss/month

1.5 years

Hydrogen
Chloride

<2%signal

loss/month

1.5 years

Hydrogen
Cyanide

<5%signal

loss/month

Hydrogen
Fluoride

<10%signal

loss/month

<2%signal

loss/month

CH3OH

Methanol

371-12EE00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

Methyl
Mercaptan

<2%signal

loss/month

<2%signal

loss/month

<2%signal

loss/month

<1%signal

loss/month

<1%signal

loss/month

1.5 years

<1%signal

loss/month

1.5 years

<1%signal

loss/month

1.5 years

<2%signal

loss/month

C4H6O2

Vinyl Acetate

371-12EF00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

C2H3Cl

Vinyl Chloride

371-12EL00-100

T90<140

<5%signal loss/year

-20 to+50

15 to 90

2 years

Gas GasName Part Number1

Chlorine Dioxide 371-282800-050 T90<120

B2H6

C2H5SH

GeH4

N2H4

H2 (ppm)

H2 (LEL)*

HBr

HCl

Diborane

Ethyl Mercaptan

Germane
Hydrazine
Hydrogen
Hydrogen

371-192100-005 T90<60

371-24EZ00-10

371-232500-002 T90<60
371-262600-001 T90<120
371-848400-100 T90=30
371-050500-04P T90<60
371-090800-030 T90<70

371-090900-030 T90<70

Time

T90<45

SpanDrift

Temperatur

e Range °C

-20 to+40 10 to 95 2 years

-20 to+40 20 to 95 1.5 years

-40 to+50 15 to 90 2 years

-20 to+40 20 to 95 1.5 years

-10 to+40 10 to 95 1 year

-20 to+50 15 to 90 2 years

-40 to+40 5 to 95 2 years

-20 to+40 10 to 95

-20 to+40 10 to 95

Humidity

Range%

Warranty

HCN

HF

H2S

CH3SH

NO

NO2

O3

COCl2

PH3

SiH4

SO2

371-131300-030 T90<40
371-333300-010 T90<90

Hydrogen Sulfide 371-242400-100 T80<30

371-24EK00-100 T90<45
Nitric Oxide
Nitrogen Dioxide
Ozone
Phosgene
Phosphine

Silane
SulfurDioxide

371-949400-100 T90=10

371-646400-010 T90<40

371-999900-001 T90<120

371-414100-001 T90<120

371-192000-005 T90<30

371-232300-050 T90<60

371-555500-020 T90=20

-40 to+40 5 to 95 2 years

-20 to+35 10 to 80 1.5 years

-40 to+50 15 to 90 2 years

-40 to+50 15 to 90 2 years

-20 to+50 15 to 90 3 years

-20 to+50 15 to 90 2 years

-10 to+40 10 to 95 2 years

-20 to+40 10 to 95

-20 to+40 20 to 95

-20 to+40 20 to 95

-20 to+50 15 to 90 2 years

DM-100 Instruction Manual Rev. 3.5 Page 30 of 41

Model DM-100

Acetyldehyde

C2H3O

Dimethyl Sulfide

C2H6S

Methane

CH4

Acetylene

C2H2

Disilane

Si2H6

Methanol

CH3OH

Acrylonitrile

C3H3N

Epichlorohydrin

C3H5OCl

Methyl-ethyl-ketone

C4H8O

Alcohols

Alcohols

Ethanol

C2H5OH

Methyl Mercaptan

CH3SH

Amines

Amines

Ethyl Mercaptan

C2H5SH

Nitric Oxide

NO

Ammonia

NH3

Ethylene

C2H4

Nitrogen

N2

Arsenic Triflouride

AsF3

Ethylene Oxide

C2H4O

Nitrogen Dioxide

NO2

Arsenic Pentaflouride

AsF5

Fluorine

F2

Ozone

O3

Arsine

AsH3

Formaldehyde

CH2O

Phosgene

COCl2

Boron Triflouride

BF3

Germane

GeH4

Phosphine

PH3

Bromine

Br2

Hydrazine

N2H4

Phosphorous Triflouride

PF3

Butadiene

C4H6

Hydrocarbons

C-H's

Silane

SiH4

Buten-1

Buten-1

Hydrocarbons (unsaturated)

C-H's (μ)

Silicon

Si

Carbon Dioxide

CO2

Hydrogen

H2

Silicon Tetra Fluoride

SiF4

Carbon Disulfide

CS2

Hydrogen Bromide

HBr

Sulfur Dioxide

SO2

Carbon Oxide Sulfide

COS

Hydrogen Chloride

HCl

Tetrahydrothiophene

C4H8S

Carbon Monoxide

CO

Hydrogen Cyanide

HCN

Thiophane

C4H4S

Carbonyl Sulfide

CS

Hydrogen Fluoride

HF

Toluene

C6H5CH3

Chlorine

Cl2

Hydrogen Selenide

HSe

Tungsten Hexafluoride

WF6

Chlorine Dioxide

ClO2

Hydrogen Sulfide

H2S

Vinyl Acetate

C4H6O2

Chlorine Trifluoride

ClF3

Dimethyl Sulfide

C2H6S

Vinyl Chloride

C2H3Cl

Diborane

B2H6

Disilane

Si2H7

8.3 Interference Table

To match the interfering gas symbol with th e gas name, reference Table 4, Interfering Gases. Then refer to
Table 5, Cross Interference Table which extends for five pages with each sensor sp ecific gas repeated in each
section of the table, for a column listing of 40 gases. The list is followed by a row of 14 possible interfering
gases per page. Review each page for the applicable sensor gas and then scan across the row for possible
interference gases.

Table 4 Interfering Gases

DM-100 Instruction Manual Rev. 3.5 Page 31 of 41

Model DM-100

Gas

C2H30

C2H2

C3H3N

Alcohols

Amines

NH3

AsF3

AsF5

AsH3

BF3

Br2

C4H6

Buten-1

C2H3O

n/a

40=340

40=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

40=170

n/d

C2H2

340=40

n/a

340=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

340=170

n/d

C3H3N

75=40

75=340

n/a

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

75=170

n/d

NH3

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

AsH3

n/d

n/d

n/d

n/d

n/d

100=0.01

n/d

n/d

n/a

n/d

n/d

n/d

n/d

Br2

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/a

n/d

n/d

C4H6

170=40

170=340

170=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/a

n/d

CS2

140=40

140=340

140=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

140=170

n/d

CO

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

Cl2

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

1=0.55

n/d

n/d

ClO2 (>10ppm)

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

1=0.18

n/d

n/d

ClO2 (=10ppm)

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

B2H6

n/d

n/d

n/d

n/d

n/d

100=0.013

n/d

n/d

0.15=0.2

n/d

n/d

n/d

n/d

C3H5OCl

50=40

50=340

50=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

50=170

n/d

C2H5OH

180=40

180=340

180=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

180=170

n/d

C2H5SH

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H4

220=40

220=340

220=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

220=170

n/d

C2H4O

275=40

275=340

275=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

275=170

n/d

F2

n/d

n/d

n/d

1000=0

n/d

n/d

n/d

n/d

0.1=0

n/d

yes n/d

n/d

n/d

CH2O

330=40

330=340

330=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

330=170

n/d

GeH4

n/d

n/d

n/d

n/d

n/d

100=<1

n/d

n/d

0.2=0.14

n/d

n/d

n/d

n/d

N2H4

n/d

n/d

n/d

1000=0

n/d

200=0.04

n/d

n/d

0.1=0.1

n/d

n/d

n/d

n/d

H2 (ppm)

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

H2 (LEL)

n/d

n/d

n/d

n/d

n/d

100=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HBr

n/d

n/d

n/d

1000=0

no

n/d

n/d

n/d

0.1=0.3

n/d

n/d

n/d

n/d

HCl

n/d

n/d

n/d

1000=0

no

n/d

n/d

n/d

0.1=0.3

n/d

n/d

n/d

n/d

HCN

n/d

n/d

n/d

1000=0

n/d

n/d

n/d

n/d

0.1=0

n/d

yes n/d

n/d

n/d

HF

n/d

n/d

n/d

1000=0

n/d

n/d

yes n/d

yes n/d

0.1=0

yes n/d

n/d

n/d

n/d

H2S

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CH3OH

415=40

415=340

415=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

415=170

n/d

CH3SH

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

275=170

n/d

NO

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

NO2

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

O3

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

0.1=0.05

n/d

yes n/d

n/d

n/d

COCl2

n/d

n/d

n/d

1000=0

n/d

50=0.5

n/d

n/d

n/d

n/d

n/d

n/d

n/d

PH3

n/d

n/d

n/d

n/d

n/d

100=0.01

n/d

n/d

1=1

n/d

n/d

n/d

n/d

SiH4

n/d

n/d

n/d

n/d

n/d

100=<1

n/d

n/d

0.2=0.14

n/d

n/d

n/d

n/d

SO2

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C4H6O2

200=40

200=340

200=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

200=170

n/d

C2H3Cl

200=40

200=340

200=75

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

200=170

n/d

Table 5 Cross Interference Table

n/a – not applicable
n/d – no data

DM-100 Instruction Manual Rev. 3.5 Page 32 of 41

Model DM-100

Gas

CO2

CS2

CO

COS

CL2

CLO2

CLF3

B2H6

C2H6S

Si2H6

C3H5OCL

C2H5OH

F2

C2H3O

n/d

40=140

40=100

40=135

n/d

n/d

n/d

n/d

40=150

n/d

40=50

40=180

n/d

C2H2

n/d

340=140

340=100

340=135

n/d

n/d

n/d

n/d

340=150

n/d

340=50

340=180

n/d

C3H3N

n/d

75=140

75=100

75=135

n/d

n/d

n/d

n/d

75=150

n/d

75=50

75=180

n/d

NH3

n/d

n/d

300=8

n/d

1=-1

10%=-15

n/d

n/d

n/d

n/d

n/d

n/d

n/d

AsH3

5000=0

n/d

300=0

n/d

0.5=-0.04

n/d

n/d

0.2=0.15

n/d

5=yes n/d

n/d

n/d

n/d

Br2

n/d

n/d

300=0

n/d

1=2

1=6

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C4H6

n/d

170=140

170=100

170=135

n/d

n/d

n/d

n/d

170=150

n/d

170=50

170=180

n/d

CS2

n/d

n/a

140=100

140=135

n/d

n/d

n/d

n/d

140=150

n/d

140=50

140=180

n/d

CO

n/d

n/d

n/a

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

200=0

n/d

Cl2

n/d

n/d

300=0

n/d

n/a

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

ClO2 (>10ppm)

n/d

n/d

300=0

n/d

3=1

n/a

n/d

n/d

n/d

n/d

n/d

n/d

n/d

ClO2 (=10ppm)

5000=0

n/d

1000=0

n/d

1=0.9

n/a

yes n/d

0.1=0

n/d

n/d

n/d

n/d

yes n/d

B2H6

5000=0

n/d

300=0

n/d

0.5=-0.05

n/d

n/d

n/a

n/d

5=yes n/d

n/d

n/d

n/d

C3H5OCl

n/d

50=140

50=100

50=135

n/d

n/d

n/d

n/d

50=150

n/d

n/a

50=180

n/d

C2H5OH

n/d

180=140

180=100

180=135

n/d

n/d

n/d

n/d

180=150

n/d

180=50

n/a

n/d

C2H5SH

n/d

n/d

300=5

n/d

1=-0.6

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H4

n/d

220=140

220=100

220=135

n/d

n/d

n/d

n/d

220=150

n/d

220=50

220=180

n/d

C2H4O

n/d

275=140

275=100

275=135

n/d

n/d

n/d

n/d

275=150

n/d

275=50

275=180

n/d

F2

5000=0

n/d

1000=0

n/d

1=1.3

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/a

CH2O

n/d

330=140

330=100

330=135

n/d

n/d

n/d

n/d

330=150

n/d

330=50

330=180

n/d

GeH4

5000=0

n/d

300=0

n/d

0.5=-0.04

n/d

n/d

0.2=0.11

n/d

5=yes n/d

n/d

n/d

n/d

N2H4

5000=0

n/d

1000=0

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

H2 (ppm)

n/d

n/d

300=<30

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

H2 (LEL)

1000=0

n/d

50=6

n/d

5=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HBr

5000=0

n/d

1000=0

n/d

5=1

n/d

yes n/d

n/d

n/d

n/d

n/d

n/d

n/d

HCl

5000=0

n/d

1000=0

n/d

5=1

n/d

1=yes n/d

n/d

n/d

n/d

n/d

n/d

n/d

HCN

5000=0

n/d

1000=0

n/d

5=-1

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HF

5000=0

n/d

1000=0

n/d

1=0.4

n/d

yes n/d

0.1=0

n/d

n/d

n/d

n/d

yes n/d

H2S

n/d

n/d

300==1.5

n/d

1=˜-0.2

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CH3OH

n/d

415=140

415=100

415=135

n/d

n/d

n/d

n/d

415=150

n/d

415=50

415=180

n/d

CH3SH

n/d

n/d

300=3

n/d

1=-0.4

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

NO

n/d

n/d

300=0

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

NO2

n/d

n/d

300=0

n/d

1=˜1

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

O3

5000=0

n/d

300=0

n/d

1=1.4

0.1=0.12

1=1(theory

n/d

n/d

n/d

n/d

n/d

0.1=0.07

COCl2

5000=0

n/d

1000=0

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

PH3

5000=0

n/d

300=0

n/d

0.5=-0.04

n/d

n/d

0.2=0.15

n/d

5=yes n/d

n/d

n/d

n/d

SiH4

5000=0

n/d

300=0

n/d

0.5=-0.04

n/d

n/d

0.2=0.11

n/d

5=yes n/d

n/d

n/d

n/d

SO2

n/d

n/d

300=<5

n/d

1=<0.5

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C4H6O2

n/d

200=140

200=100

200=135

n/d

n/d

n/d

n/d

200=150

n/d

200=50

200=180

n/d

C2H3Cl

n/d

200=140

200=100

200=135

n/d

n/d

n/d

n/d

200=150

n/d

200=50

200=180

n/d

Table 5 Cross Interference Table (pg.2)

n/a – not applicable
n/d – no data

DM-100 Instruction Manual Rev. 3.5 Page 33 of 41

Model DM-100

Gas

C2H4

C2H4O

CH2O

GeH4

N2H4

C-H's

C-H's (U)

H2

HBr

HCL

HCN

HF

I2

C2H3O

40=220

40=275

40=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H2

340=220

340=275

340=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C3H3N

75=220

75=275

75=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

NH3

100=0

n/d

n/d

N/d

n/d

n/d

n/d

200=4

n/d

5=-3

10=0

n/d

n/d

AsH3

n/d

n/d

n/d

1=0.4

n/d

%range=0

n/d

3000=0

n/d

5=0

10=0.1

4=0

n/d

Br2

100=0

n/d

n/d

N/d

n/d

n/d

n/d

100=0

n/d

5=0

10=0

n/d

n/d

C4H6

170=220

170=275

170=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CS2

140=220

140=275

140=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CO

100=<100

n/d

n/d

N/d

n/d

n/d

n/d

100=<60

n/d

5=0

10=<2

n/d

n/d

Cl2

100=0

n/d

n/d

N/d

n/d

n/d

n/d

100=0

n/d

5=0

10=0

n/d

n/d

ClO2 (>10ppm)

100=0

n/d

n/d

N/d

n/d

n/d

n/d

100=0

n/d

5=0

10=0

n/d

n/d

ClO2 (=10ppm)

n/d

n/d

n/d

1=0

n/d

%range=0

n/d

1%=0

n/d

n/d

n/d

n/d

n/d

B2H6

n/d

n/d

n/d

1=0.53

n/d

%range=0

n/d

3000=0

n/d

5=0

10=0.13

4=0

n/d

C3H5OCl

50=220

50=275

50=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H5OH

180=220

180=275

180=330

N/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H5SH

100=0

n/d

n/d

N/d

n/d

n/d

n/d

1%=<15

n/d

5=0

10=0

n/d

n/d

C2H4

n/a

220=275

220=330

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H4O

275=220

n/a

275=330

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

F2

n/d

n/d

n/d

n/d

n/d

%range=0

n/d

1%=0

n/d

5=0

1=-3

3=0

n/d

CH2O

330=220

330=275

n/a

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

GeH4

n/d

n/d

n/d

n/a

n/d

%range=0

n/d

3000=0

n/d

5=0

10=1

4=0

n/d

N2H4

n/d

n/d

n/d

n/d

n/a

%range=0

n/d

1000=0

n/d

5=0.1

n/d

3=0

n/d

H2 (ppm)

100=˜80

n/d

n/d

n/d

n/d

n/d

n/d

n/a

n/d

5=0

10=˜3

n/d

n/d

H2 (LEL)

yes n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/a

n/d

n/d

10=0

n/d

n/d

HBr

n/d

n/d

n/d

n/d

n/d

%range=0

n/d

1%=0

n/a

1=1

15=1

3=0

n/d

HCl

n/d

n/d

n/d

1=n/d

n/d

%range=0

n/d

1%=0

1=1

n/a

15=1

3=0

n/d

HCN

n/d

n/d

n/d

n/d

n/d

%range=0

n/d

1000=0

n/d

5=0

n/a

3=0

n/d

HF

n/d

n/d

n/d

1=0

n/d

%range=0

n/d

1%=0

n/d

5=3.3

n/d

n/a

n/d

H2S

100=0

n/d

n/d

n/d

n/d

n/d

n/d

1%=<5

n/d

5=0

10=0

n/d

n/d

CH3OH

415=220

415=275

415=330

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CH3SH

100=0

n/d

n/d

n/d

n/d

n/d

n/d

1%=<10

n/d

5=0

10=0

n/d

n/d

NO

100=0

n/d

n/d

n/d

n/d

n/d

n/d

100=0

n/d

5=<1

10=0

n/d

n/d

NO2

100=0

n/d

n/d

n/d

n/d

n/d

n/d

100=0

n/d

5=0

10=0

n/d

n/d

O3

n/d

n/d

n/d

n/d

n/d

n/d

n/d

1%=0.003

n/d

10=0

10=0.03

5=0

yes n/d

COCl2

n/d

n/d

n/d

n/d

n/d

%range=0

n/d

1%=0

n/d

5=0

5=0

3=0

n/d

PH3

n/d

n/d

n/d

1=0.4

n/d

%range=0

n/d

3000=0

n/d

5=0

10=0.1

4=0

n/d

SiH4

n/d

n/d

n/d

1=1.0

n/d

%range=0

n/d

3000-=0

n/d

5=0

10=1

4=0

n/d

SO2

100=0

n/d

n/d

n/d

n/d

n/d

n/d

100=0

n/d

5=0

10=<5

n/d

n/d

C4H6O2

200=220

200=275

200=330

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C2H3Cl

200=220

200=275

200=330

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

Table 5 Cross Interference Table (pg.3)

n/a – not applicable
n/d – no data

DM-100 Instruction Manual Rev. 3.5 Page 34 of 41

Model DM-100

Gas

HSe

H2S

C3H8O

CH4

CH3OH

C4H8O

CH3SH

NO

N2

NO2

O3

COCL2

PH3

C2H3O

n/d

n/d

n/d

n/d

40=415

n/d

40=275

n/d

n/d

n/d

n/d

n/d

n/d

C2H2

n/d

n/d

n/d

n/d

340=415

n/d

340=275

n/d

n/d

n/d

n/d

n/d

n/d

C3H3N

n/d

n/d

n/d

n/d

75=415

n/d

75=275

n/d

n/d

n/d

n/d

n/d

n/d

NH3

n/d

15=30

n/d

n/d

n/d

n/d

n/d

35=6

n/d

5=-1

n/d

n/d

n/d

AsH3

0.05=0.005

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/d

0.1=0.11

Br2

n/d

15=-1.5

n/d

n/d

n/d

n/d

n/d

35=0

n/d

5=˜10

n/d

n/d

n/d

C4H6

n/d

n/d

n/d

n/d

170=415

n/d

170=275

n/d

n/d

n/d

n/d

n/d

n/d

CS2

n/d

n/d

n/d

n/d

140=415

n/d

140=275

n/d

n/d

n/d

n/d

n/d

n/d

CO

n/d

15=<0.3

n/d

n/d

n/d

n/d

n/d

35==7

n/d

5=0.5

n/d

n/d

n/d

Cl2

n/d

15=-0.75

n/d

n/d

n/d

n/d

n/d

35=0

n/d

5=˜5

n/d

n/d

n/d

ClO2 (>10ppm)

n/d

15=0.25

n/d

n/d

n/d

n/d

n/d

35=0

n/d

5=1.66

n/d

n/d

n/d

ClO2 (=10ppm)

n/d

10=-0.015

n/d

n/d

n/d

n/d

n/d

n/d

n/d

yes n/d

yes n/d

n/d

n/d

B2H6

0.05=0.006

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/d

0.1=0.14

C3H5OCl

n/d

n/d

n/d

n/d

50=415

n/d

50=275

n/d

n/d

n/d

n/d

n/d

n/d

C2H5OH

n/d

n/d

n/d

n/d

180=415

n/d

180=275

n/d

n/d

n/d

n/d

n/d

n/d

C2H5SH

n/d

1:03

n/d

n/d

n/d

n/d

5=8

35=<6

n/d

5=-1.5

n/d

n/d

n/d

C2H4

n/d

n/d

n/d

n/d

220=415

n/d

220=275

n/d

n/d

n/d

n/d

n/d

n/d

C2H4O

n/d

n/d

n/d

n/d

275=415

n/d

275=275

n/d

n/d

n/d

n/d

n/d

n/d

F2

n/d

1=-1.5

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

1=0.05

0.1=0.2

n/d

n/d

CH2O

n/d

n/d

n/d

n/d

330=415

n/d

330=275

n/d

n/d

n/d

n/d

n/d

n/d

GeH4

0.05=0.005

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/d

0.1=0.13

N2H4

n/d

1=0.1

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

1=-0.25

0.1=-0.1

n/d

0.3=0.1

H2 (ppm)

n/d

15=<3

n/d

n/d

n/d

n/d

n/d

35=˜10

n/d

5=0

n/d

n/d

n/d

H2 (LEL)

n/d

n/d

yes n/d

1%=0

n/d

n/d

n/d

yes n/d

n/d

10=0

n/d

n/d

n/d

HBr

0.1=0

10=2.75

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

0.1=0

0.1=0.3

HCl

0.1=0

10=2.75

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

0.1=0

0.1=0.3

HCN

n/d

10=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

10=-12

0.1=0

n/d

0.3=0

HF

n/d

10=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

10˜0.1

n/d

n/d

0.1=0

H2S

n/d

n/a

n/d

n/d

n/d

n/d

2:01

35=<2

n/d

5=-0.5

n/d

n/d

n/d

CH3OH

n/d

n/d

n/d

n/d

n/a

n/d

415=275

n/d

n/d

n/d

n/d

n/d

n/d

CH3SH

n/d

1:02

n/d

n/d

n/d

n/d

n/a

35=<4

n/d

5=-1.0

n/d

n/d

n/d

NO

n/d

15=˜5

n/d

n/d

n/d

n/d

n/d

100=0

n/d

5=<1.5

n/d

n/d

n/d

NO2

n/d

15=-0.75

n/d

n/d

n/d

n/d

n/d

35=0

n/d

n/a

n/d

n/d

n/d

O3

n/d

1=-.015

n/d

n/d

n/d

n/d

n/d

10=0

100%=0

1=0.7

n/a

n/d

0.3=0.03

COCl2

n/d

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/a

0.3=0

PH3

0.05=0.005

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/d

n/a

SiH4

0.05=0.005

1=0

n/d

n/d

n/d

n/d

n/d

n/d

100%=0

n/d

n/d

n/d

0.1=0.13

SO2

n/d

15=0

n/d

n/d

n/d

n/d

n/d

35=0

n/d

5=˜-5

n/d

n/d

n/d

C4H6O2

n/d

n/d

n/d

n/d

200=415

n/d

200=275

n/d

n/d

n/d

n/d

n/d

n/d

C2H3Cl

n/d

n/d

n/d

n/d

200=415

n/d

200=275

n/d

n/d

n/d

n/d

n/d

n/d

Table 5 Cross Interference Table (pg.4)

n/a – not applicable
n/d – no data

DM-100 Instruction Manual Rev. 3.5 Page 35 of 41

Model DM-100

Gas

PF3

SiH4

Si

SiF4

SO2

C4H8S

C4H4S

C6H5CH3

WF6

C4H6O2

C2H3CL

C2H5SH

C6H5CH3

C2H3O

n/d

n/d

n/d

n/d

n/d

n/d

40=45

n/d

n/d

40=200

40=200

n/d

40=55

C2H2

n/d

n/d

n/d

n/d

n/d

n/d

340=45

n/d

n/d

340=200

340=200

n/d

340=55

C3H3N

n/d

n/d

n/d

n/d

n/d

n/d

75=45

n/d

n/d

75=200

75=200

n/d

75=55

NH3

n/d

n/d

n/d

n/d

5=-0.5

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

AsH3

n/d

1=0.56

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

Br2

n/d

n/d

n/d

n/d

5=-0.1

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C4H6

n/d

n/d

n/d

n/d

n/d

n/d

170=45

n/d

n/d

170=200

170=200

n/d

170=55

CS2

n/d

n/d

n/d

n/d

n/d

n/d

140=45

n/d

n/d

140=200

140=200

n/d

140=55

CO

n/d

n/d

n/d

n/d

5=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

Cl2

n/d

n/d

n/d

n/d

5=-0.05

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

ClO2 (>10ppm)

n/d

n/d

n/d

n/d

5=-0.016

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

ClO2 (=10ppm)

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

B2H6

n/d

1=0.72

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C3H5OCl

n/d

n/d

n/d

n/d

n/d

n/d

50=45

n/d

n/d

50=200

50=200

n/d

50=55

C2H5OH

n/d

n/d

n/d

n/d

n/d

n/d

180=45

n/d

n/d

180=200

180=200

n/d

180=55

C2H5SH

n/d

n/d

n/d

n/d

5=<3

n/d

n/d

n/d

n/d

n/d

n/d

n/a

n/d

C2H4

n/d

n/d

n/d

n/d

n/d

n/d

220=45

n/d

n/d

220=200

220=200

n/d

220=55

C2H4O

n/d

n/d

n/d

n/d

n/d

n/d

275=45

n/d

n/d

275=200

275=200

n/d

275=55

F2

n/d

n/d

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

CH2O

n/d

n/d

n/d

n/d

n/d

n/d

330=45

n/d

n/d

330=200

330=200

n/d

330=55

GeH4

n/d

1=1

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

N2H4

n/d

n/d

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

H2 (ppm)

n/d

n/d

n/d

n/d

5=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

H2 (LEL)

n/d

n/d

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HBr

n/d

n/d

n/d

n/d

5=2.5

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HCl

n/d

n/d

n/d

n/d

5=2.5

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HCN

n/d

n/d

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

HF

yes n/d

n/d

n/d

3=4(theory)

yes n/d

n/d

n/d

n/d

yes n/d

n/d

n/d

n/d

n/d

H2S

n/d

n/d

n/d

n/d

5=<1

n/d

n/d

n/d

n/d

n/d

n/d

3=1

n/d

CH3OH

n/d

n/d

n/d

n/d

n/d

n/d

415=45

n/d

n/d

415=200

415=200

n/d

413=55

CH3SH

n/d

n/d

n/d

n/d

5=<2

n/d

n/d

n/d

n/d

n/d

n/d

2=1

n/d

NO

n/d

n/d

n/d

n/d

5=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

NO2

n/d

n/d

n/d

n/d

5=-0.025

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

O3

n/d

1=0.015

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

COCl2

n/d

n/d

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

PH3

n/d

1=0.56

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

SiH4

n/d

n/a

n/d

n/d

2=0

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

SO2

n/d

n/d

n/d

n/d

n/a

n/d

n/d

n/d

n/d

n/d

n/d

n/d

n/d

C4H6O2

n/d

n/d

n/d

n/d

n/d

n/d

200=45

n/d

n/d

n/a

200=200

n/d

200=55

C2H3Cl

n/d

n/d

n/d

n/d

n/d

n/d

200=45

n/d

n/d

200=200

n/a

n/d

200=55

Table 5 Cross Interference Table (pg.5)

n/a – not applicable
n/d – no data

DM-100 Instruction Manual Rev. 3.5 Page 36 of 41

Model DM-100

8.4 Proper Application and Maintenance of Acrylonitrile Sensor

Acrylonitrile (ACN) is a very d angerous toxic gas that has OSHA and NIOSH TWA li mits of 1 and 2 ppm
respectively. It has an IDLH (Immediately Danger ous to Life and Health) limit of 85 ppm and a 15 minute
ceiling limit exposure of 10 ppm.
The Detcon Model DM-700 Acrylonitrile Sensor is based on an electrochemical sensor which has certain
limitations of use. Although it has good original span sensitivity to measure acrylonitrile, it has been known in
certain application cases to lose sensitivi t y over time.
Continuous exposure to background ACN levels or repeated high ACN exposures will cause the sensor’s
response to ACN gas to be lost, and hence its useful life be shortened.
It is not reliably suitable for strict industrial hygiene monitoring where the application goal may be to assure
that the ACN levels remain below the 2 ppm TWA limit s.
When properly maintained it does offer the ability to function as gross leak detection method for ACN
releases.
The lowest recommended scale range for ACN is 0- 50 ppm. The lowest recommended alarm set limit is 4
ppm.
Sensor Warranty is 6 months (this shortened warr anty period reflects the vulnerability to un predictable losses
of sensitivity).
Using appropriate PPE, the sensor should p eriodically b e span calibrat ed with ACN targ et gas (or occasionally
bump tested with ACN target gas). However, frequent exposures to ACN during calibrations and bump testing
will also shorten the life of the senso r. To add ress th is, it is p ossib le to use Carb on M onoxi de (CO) as a cro ss­calibration gas, but CO may only be used if it is in combination with a program of periodic ACN bump testing
that confirms the ultimate ability to adequatel y sense the ACN should a release occur. If the ACN bu mp test
result is not acceptable, then a formal AC N span calibration must take place.
The end-user should work with Detcon to assure that a suitable amount of replacement Plug-in sensors are
available on hand to handle the ongoing exchange of sensors that may require periodic replacement.

DM-100 Instruction Manual Rev. 3.5 Page 37 of 41

Model DM-100

8.5 Intrinsically Safe Installation Guidelines, Control Drawing #3993

DM-100 Instruction Manual Rev. 3.5 Page 38 of 41

Figure 15 Control Drawing #3993

Model DM-100

921-245400-000

DM-100 Intelligent Transmitter Module (ITM for Toxic Gas Sensors is
universal design for all gas types and ranges via lab el inscription.)

921-345500-025

DM-100 Intelligent Transmitter Module (ITM for O2 Sensors)

371-

XXXX00-XXX

Replacement Plug-in toxic gas sensor (Table 3, Sensor Specific Data)

500-005157-100

Model 100 Standard Terminal Board

500-005158-100

Model 100 Display Terminal Board (used with display option)

500-005158-200

Model 100 Display Terminal Board (used with batt ery option)

345-001560-100

Model 100 Display Assembly

613-120000-700

Sensor Splash Guard with integral Cal Port

602-003552-000

100 Series Bottom Housing Assembly (includes DM-100 Splash Guard
adapter, O-Ring and Gasket)

602-003552-100

100 Series Bottom Housing Assembly with integral f ilt er
O-Ring ,Gasket and Filter)

943-002273-000

Harsh Environment Sensor Guard

327-000000-000

Programming Magnet

943-000000-000

Calibration Wind Guard

943-000006-132

Threaded Calibration Adapter

943-000000-000

Calibration Wind Guard

943-01747-T05

Calibration Adapter for highly reactive gases

943-050000-132

Span Gas Kit: Includes calibration adapter, span gas humidifier, 500cc/min
fixed flow regulator, and carrying case. (Not including gas).

943-050000-HRG

Highly Reactive Gas Span Gas Kit (Used for NH3, Cl2, HCl, HBr, etc.)

See Detcon

Span Gases – various

943-05AM00-000

500 cc/min Fixed Flow Regulator for span gas bottle

897-850800-010

NEMA 7 Aluminum Condulet Base

897-850400-010

NEMA 7 Aluminum Condulet Solid Cover

897-850500-010

NEMA 7 Aluminum Condulet w/Window Cover

897-850801-316

NEMA 7 316SS Condulet Base

897-850401-316

NEMA 7 316SS Condulet Solid Cover

897-850701-316

NEMA 7 316SS Condulet w/Window Cover

960-202200-000

Condensation prevention packet (For condulet , replace annually)

800-004221-000

Mounting Plate

500-005157-100

Model 100 Standard Terminal Board

500-005158-100

Model 100 Display Terminal Board (used with display option)

500-005158-200

Model 100 Display Terminal Board (used with battery option)

345-001560-100

Model 100 Display Assembly

975-343002-007

Detcon’s RFI Protection Circuit Accessory

8.6 Spare Parts, Sensor Accessories, Calibration Equipment

Part Number Spare Parts

Part Number Sensor Accessories

(Used in H2S sensor assemblies) (includes DM 100 Splash Guard adapter,

Part Number Calibration Accessories

Part Number Optional Accessories

DM-100 Instruction Manual Rev. 3.5 Page 39 of 41

Model DM-100

Revision

Date

Changes made

Approval

0.0

09/01/2010

Initial Release

LU

0.1

11/08/2010

Update to Cross Interference table to correct wrong value for

value is 200=100

LU

0.2

11/17/2010

Added updated table for Jumper descriptions and Jumper
settings on DM-100 Terminal Board

LU

0.3

11/30/2010

Corrections to Cross Interference Table, and some spelling

LU

1.0

02/02/2011

Revised ATEX operational guidelines. Updated manual to

100 manual so manuals can

This includes removing duplicate

adding/modifying tables and figures,

updating drawings, adding/modifying sections, etc.

BM

1.1

02/15/2011

Added additional notes required by approval agencies.

LU

1.2

04/06/2011

Added references to 100 Series Bottom Housing Assembly with

100 Series Bottom Housing Assembly

with integral filter to spare parts. Modified troubleshooting

100 Series Bottom Housing

Assembly with integral filter

BM

1.3

04/13/2011

Add additional guidelines in 2.1 per ATEX requirements.

VR

1.4

06/02/2011

Added “DM-200L Toxic Gas Sensors” on Cover Sheet

LU

1.5

08/01/2011

Added DM-100 intrinsically safe installation notes drawing to
back of manual.

LU

2.0

08/17/2011

Updated Terminal Boards, new display

LU

3.0

10/5/2012

Added AutoZero and AutoSpan

LU

3.1

11/22/13

Corrected instructions for performing span with no display

LU

3.2

12/26/13

Added Wind Guard to Calibration Procedure

BM

3.3

01/30/14

Stress and highlight parts of span calibration for O2 sensors

BM

3.4

11/15/17

Added Max Altitude and dimensions for DM-100 w/ Display to
Specifications

BM

3.5

06/08/18

Updated Section 2.5 Conduit Seal

MM

8.7 Revision Log

C2H3CL against CO. Previous value was 1250=100, corrected

reflect most current template. Made significant changes due to
creation of Wireless DM­complement each other.
tables and figures,

integral filter. Added

section to reference use of

DM-100 Instruction Manual Rev. 3.5 Page 40 of 41

Model DM-100

Shipping Address: 4055 Technology For est Blvd, The Woodlands, Texas 77381

Phone: [phone] • Fax: [phone] • www.detcon.com • [e-mail]

Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067

DM-100 Instruction Manual Rev. 3.5 Page 41 of 41