ATI Technologies d12 User Manual

Series D12

Toxic Gas Transmitter

With H10 Smart Sensor

Home Office European Office

Analytical Technology, Inc. ATI (UK) Limited
6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park
Collegeville, PA 19426 Delph New Rd. Delph
Saddleworth OL3 5DE
Ph: 800-959-0299 Ph: [phone]

610-917-0991

Fax: [phone] Fax: + 44 (0)1457-874-468
Email: [e-mail] Email: [e-mail]

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Product Warranty

Analytical Technology, Inc. (Manufacturer) warrants to the Customer that if any part(s) of the
Manufacturer's products prove to be defective in materials or workmanship within the earlier
of 18 months after the date of shipment or 12 months after the date of start-up, such
defective parts will be repaired or replaced free of charge. Inspection and repairs to products
thought to be defective within the warranty period will be completed at the Manufacturer's
facilities in Collegeville, PA. Products on which warranty repairs are required shall be
shipped freight prepaid to the Manufacturer. The product(s) will be returned freight prepaid if
it is determined by the manufacturer that the part(s) failed due to defective materials or
workmanship.

This warranty does not cover consumable items, batteries, or wear items subject to periodic
replacement including lamps and fuses.

Gas sensors, except oxygen sensors, are covered by this warranty, but are subject to
inspection for evidence of extended exposure to excessive gas concentrations. Should
inspection indicate that sensors have been expended rather than failed prematurely, the
warranty shall not apply.

The Manufacturer assumes no liability for consequential damages of any kind, and the buyer
by acceptance of this equipment will assume all liability for the consequences of its use or
misuse by the Customer, his employees, or others. A defect within the meaning of this
warranty is any part of any piece of a Manufacturer's product which shall, when such part is
capable of being renewed, repaired, or replaced, operate to condemn such piece of
equipment.

This warranty is in lieu of all other warranties (including without limiting the generality of the
foregoing warranties of merchantability and fitness for a particular purpose), guarantees,
obligations or liabilities expressed or implied by the Manufacturer or its representatives and
by statute or rule of law.

This warranty is void if the Manufacturer's product(s) has been subject to misuse or abuse, or
has not been operated or stored in accordance with instructions or if the serial number has
been removed.

Analytical Technology, Inc. makes no other warranty expressed or implied except as stated
above.

Revision N (7/15) 2

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Table Of Contents

INTRODUCTION ______________________ 5

COMPONENTS ..........................................................5

D12 Toxic Transmitter ..................................................... 5

H10 Smart Sensor and C18 Gas Generator ................... 5

SPECIFICATIONS ____________________ 8
INSTALLATION ______________________ 9

MECHANICAL MOUNTING .......................................9

Transmitter ...................................................................... 9

H10 Sensor Duct-Mount Option ...................................... 10

ELECTRICAL CONNECTIONS ..................................12

Board Stack .................................................................... 12

Power Supply Board Connections................................... 13

External Connections ...................................................... 14

ATI A17/B14 Monitor(s), 2-Wire Mode ............................... 14

ATI A17/B14 Monitor(s), 3-Wire Mode ............................... 15

Power Only, No Output Options ........................................ 16

Current Loop Receiver, Single Supply (2-Wire Mode) ....... 17

Current Loop Receiver, Single Supply (3-Wire Mode) ....... 18

Current Loop Receiver, Dual Supplies (4-Wire Mode) ....... 19

HART Transmitter, Point-to-Point (2-Wire) ........................ 20

HART Transmitter, Point-to-Point, Active Source (3-Wire) . 21

Modbus RS485 Multi-drop ................................................. 23

Computer RS232 .............................................................. 24

Remote Sensor Wiring .................................................... 25

Duct-Mount Sensor Wiring .............................................. 26

Heater Option for Sensor/Generator Housing ................. 27

CPU Board Configuration ................................................ 28

OPERATION _________________________ 29

OPERATOR INTERFACE ..........................................29

Interface Panel ................................................................ 29

Startup Review Sequence ............................................... 30

Main Display Page .......................................................... 31

Five-minute Time-out Rule ................................................ 31

Esc Key Operation (Main Display Page) ............................ 31

Fault Indication (Main Display Page) ................................. 31

Main Reading .................................................................. 32

Variable Editing ............................................................... 33

SENSORS AND GENERATORS .................................34

Sensor Setup .................................................................. 34

Sensor Setup Page ........................................................... 34

Sensor More Page ............................................................ 35

Changing H10 Sensors and C18 Generators .................. 35

Removing Sensors ............................................................ 35

Installing Sensors .............................................................. 35

Removing Generators ....................................................... 36

Installing Generators ......................................................... 36

Bump-Testing .................................................................. 37

Calibration ....................................................................... 38

Calibration Frequency ....................................................... 38

Zero Calibration ................................................................. 38

Span Calibration ............................................................... 38

Calibration Terminology .................................................... 38

Calibration Kits .................................................................. 38

Indications During Sensor Calibration ............................... 38

Calibration Exceptions ...................................................... 38

Zero Calibration Procedure ............................................... 39

Span Calibration Procedure .............................................. 40

Calibration of Duct-Mount H10 Sensors ............................ 41

Sensor Calibration Records .............................................. 42

Auto-test .......................................................................... 43

Auto-test Controls ............................................................. 45

Auto-test Controls ............................................................. 45

Auto-test Setup ................................................................. 45

Auto-test Setup Options .................................................... 46

Next Auto-test ................................................................... 46

Auto-test History ............................................................... 47

Gas Generator Information ............................................... 47

Auto-test Sequence .......................................................... 47

ALARMS AND RELAYS ............................................. 49

Gas Concentration Alarms .............................................. 49

Manual Alarm Reset ......................................................... 49

Remote Reset ................................................................... 49

Gas Alarm Operation ........................................................ 50

Gas Alarm Setup .............................................................. 51

Fault Alarms .................................................................... 53

Corrective Actions ............................................................. 53

Alarm Relays .................................................................... 56

Relays Setup .................................................................... 57

Testing Alarm Relays ........................................................ 57

Relay Test Page ............................................................... 57

Inhibiting Alarms .............................................................. 58

Alarm Inhibit Setup ............................................................ 58

4-20MA OUTPUT .......................................................... 59

Output Overrides .............................................................. 59

4-20mA Setup ................................................................... 59

4-20mA Control ................................................................. 60

Loop Adjustment ............................................................... 60

DATA-LOG ................................................................... 61

Data-log Access ................................................................ 61

Data-log Setup .................................................................. 61

Data-log Graphic Report ................................................... 62

Data-log Tabular Report .................................................... 62

Data-log Printout ............................................................... 63

DISPLAY ...................................................................... 64

Display Setup .................................................................... 64

SYSTEM ....................................................................... 65

System Access ................................................................. 65

Real-time Clock ............................................................... 65

Clock Setup ...................................................................... 65

Security ........................................................................... 66

Security Control ................................................................ 66

Activating Security ............................................................ 66

Deactivating Security ........................................................ 67

Changing the Password .................................................... 67

Communications .............................................................. 68

Communication Setup ....................................................... 68

ASCII ................................................................................ 69

HART ................................................................................ 69

Modbus ............................................................................. 71

Transmitter Version ......................................................... 71

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Restart ............................................................................ 72

Resets ............................................................................. 72

SPARE PARTS _______________________ 73
APPENDIX A. ________________________ 76

PRINTING DATA LOG REPORTS ......................................76

Serial Connection ............................................................ 76

List of Figures

Figure 1. Transmitter, sensor, generator 5
Figure 2. Overall dimensions 9
Figure 3. Duct-mount sensor holder 10
Figure 4 Duct Mount Sensor Exploded View 10
Figure 5. Duct-mount adapter 11
Figure 6. Duct-mount assembly 11
Figure 7. Separating the board stack 12
Figure 8. Power Supply Board Connections 13
Figure 9. ATI A17/B14 Monitors, 2-wire 14
Figure 10. ATI A17/B14 Monitor(s), 3-Wire Mode 15
Figure 11. Power Only, No Output Options 16
Figure 12. Current Loop, Single Supply (2-Wire Mode) 17
Figure 13. Current Loop Single Supply (3-Wire Mode) 18
Figure 14. Current Loop, Dual Supplies (4-Wire Mode) 19
Figure 15. HART Operation, Point-to-Point (2-Wire) 20
Figure 16. HART Operation, Point-to-Point (3-Wire) 21
Figure 17. HART Transmitter Operation, Multi-drop 22
Figure 18. Modbus RS485 multi-drop connections 23
Figure 19. Computer RS232 24
Figure 20 - Remote H10 Sensor Wiring 25
Figure 21 - Duct Mount Wiring 26
Figure 22 - Optional Heated Sensor Wiring 27
Figure 23. CPU Board configuration 28
Figure 24. Operator interface panel 29
Figure 25. Startup review sequence 30
Figure 26. Main display 31
Figure 27. Standard fault indication 31
Figure 28. Variable editing 33
Figure 29. Sensor setup page 34
Figure 30. Data-log warning page 34
Figure 31. Sensor “more” page 35
Figure 32. Sensor removal 35
Figure 33. Generator removal 36
Figure 34. Zero calibration 39
Figure 35. Zero_Sensor page 39
Figure 36 Span calibration 40
Figure 37. Span_Sensor page 40
Figure 38. Calibration of duct-mount H10 sensors (ATI-0664) 41

Communication Setup Page ............................................ 76

Flow Control .................................................................... 76

Report Format ................................................................. 77

Report Control ................................................................. 77

EXAMPLE: CHARTING A DATA LOG REPORT .................. 78

Starting the Report .......................................................... 81

Charting with Microsoft Excel .......................................... 84

Figure 39. Sensor calibration history page 42
Figure 40. Auto-test control page 45
Figure 41. Auto-test setup page 45
Figure 42. Auto-test sequence 48
Figure 43. Default alarm relationships for toxic gas sensors. 49
Figure 44. Default alarm relationships for oxygen sensors 49
Figure 45. Manual alarm reset 49
Figure 46. Rising alarm (Active=ABOVE_SP, Reset=AUTO) 50
Figure 47. Falling alarm (Active=BELOW_SP, Reset=AUTO) 50
Figure 48. Alarm setup pages 51
Figure 49. Fault alarm (Main Display) 53
Figure 50. Fault page 53
Figure 51 Alarm relay schematic(default – no alarms active) 56
Figure 52. Relay setup page (example) 57
Figure 53. Relay test page example 57
Figure 54. Inhibiting alarms from the Main Display 58
Figure 55. Alarm inhibit setup page 58
Figure 56. Current loop output plot 59
Figure 57. 4-20mA setup page 59
Figure 58. 4-20mA control page 60
Figure 59. Loop adjustment pages 60
Figure 60. Data log access page 61
Figure 61. Data log setup page 61
Figure 62. Data log graphic report page 62
Figure 63. Data log tabular report page 62
Figure 64. Data-log printout (example) 63
Figure 65. System access page 65
Figure 66. Clock setup page 65
Figure 67. Security control page 66
Figure 68. Activating security 66
Figure 69. Deactivating security 67
Figure 70. Changing the password 67
Figure 71. Communication setup page 68
Figure 72. Hart setup pages 69
Figure 73. Hart a) Find-me and b) Device found pages 70
Figure 74. Modbus setup page 71
Figure 75. Transmitter version page 71

Revision N (7/15) 4

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Operating H10 sensors in extremely dry air or in

1

Lock Ring

Sensor

Housing

2 3

INTRODUCTION

COMPONENTS

D12 Toxic Transmitter

The D12 Toxic Transmitter is used to monitor for gas leaks near storage cylinders, process piping, or
gas feed equipment in virtually any type of industrial plant environment. The transmitter housing is
explosion proof, and is rated for use in hazardous locations (see specifications). The transmitter features
an H10 Smart Sensor, a non-intrusive four button user interface with a back-lighted graphics display,
three level alarm system with three (optional) alarm relays, high-resolution 4-20mA current loop
output, real-time clock, data-logger, and optional HART™ or Modbus™ communication interface. In
addition, the transmitter offers several optional H10 gas generators for automatic, timed testing of H10
sensors.

H10 Smart Sensor and C18 Gas Generator

H10 Smart Sensors and C18 generators contain non­volatile memory to store information about the target gas
they were designed to monitor, or generate. They contain
general information about the target gas, such as the name,
range, units, alarm settings, along with specific calibration
information, such as response to gas, mA-Hr of usage, and
calibration history. Information is transferred into the
transmitter at startup, and whenever one of the
components is inserted into a live transmitter. Because all
calibration data is stored in the memory, sensor modules
may be calibrated using a spare transmitter in the shop,
and subsequently installed into a field transmitter,
eliminating the need for field calibration.

Sensors and generators plug into the external housing at
the base of the transmitter. They are easily removed, and
installation is simplified by way of molded carrier that
aligns each connector for a perfect fit. Once installed, a ¼
turn locking ring secures the carrier in place. Simply
install the sensor and generator into the carrier (1), slide it
onto the alignment pins (2), and twist the ring ¼ turn
counter clockwise (3).

Sensors and generators are designed for use in ambient air
at temperatures of -30° to +60° C, at a relative humidity
between 20 and 98 %RH (some sensors are rated to -40°
C, oxygen sensors are rated to -10° C).

condensing gas streams is not recommended.

D12

Transmitter

Sensor
Generator

Figure 1. Transmitter, sensor, generator

(carrier shown rotated 90° for clarity).

D12 GAS Transmitter

Carrier

Revision N (7/15) 5

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Gas Part No.

Standard

Minimum

Maximum

Table 1. H10 Smart Sensors

Range

GENERAL GASES

Acetylene 00-1057 0-200 PPM 0-50 PPM 0-500 PPM
Alcohol 00-1043 0-200 PPM 0-50 PPM 0-500 PPM
Alcohol 00-1044 0-500 PPM 0-500 PPM 0-2000 PPM
Ammonia 00-1010* 0-100 PPM 0-50 PPM 0-500 PPM
Ammonia 00-1011 0-1000 PPM 0-500 PPM 0-2000 PPM
Carbon Monoxide 00-1012* 0-100 PPM 0-50 PPM 0-1000 PPM
Dimethylamine (DMA) 00-1450 0-100 PPM 0-100 PPM 0-200 PPM
Ethylene Oxide 00-1039* 0-20 PPM 0-20 PPM 0-200 PPM
Formaldehyde 00-1040* 0-20 PPM 0-20 PPM 0-200 PPM
Formaldehyde 00-1349 0-1000 PPM 0-500 PPM 0-2000 PPM
Hydrogen 00-1041 0-2000 0-500 PPM 0-2000 PPM
Hydrogen 00-1013 0-4 % 0-1% 0-10 %
Nitric Oxide 00-1021 0-100 PPM 0-50 PPM 0-500 PPM
NOx 00-1181 0-200 PPM 0-50 PPM 0-500 PPM
Oxygen 00-1014 0-25% 0-10% 0-25%
Phosgene 00-1015 0-1 PPM 0-1 PPM 0-5 PPM
Phosgene 00-1016 0-100 PPM 0-5 PPM 0-100 PPM

OXIDANT GASES

Bromine 00-1000* 0-1 PPM 0-1 PPM 0-5 PPM

Bromine 00-1001* 0-10 PPM 0-5 PPM 0-200 PPM
Chlorine 00-1002* 0-1 PPM 0-1 PPM 0-5 PPM
Chlorine 00-1003* 0-10 PPM 0-5 PPM 0-200 PPM
Chlorine Dioxide 00-1004* 0-1 PPM 0-1 PPM 0-5 PPM
Chlorine Dioxide 00-1005* 0-10 PPM 0-5 PPM 0-200 PPM
Chlorine Dioxide 00-1359 0-1000 PPM 0-200 PPM 0-1000 PPM
Chlorine Dioxide 00-1425 0-1 PPM 0-1 PPM 0-5 PPM

Fluorine 00-1006* 0-1 PPM 0-1 PPM 0-5 PPM

Fluorine 00-1007* 0-10 PPM 0-5 PPM 0-200 PPM

Hydrogen Peroxide 00-1042* 0-10 PPM 0-10 PPM 0-200 PPM

Hydrogen Peroxide 00-1169 0-1000 PPM 0-200 PPM 0-2000 PPM

Iodine 00-1036* 0-1 PPM 0-1 PPM 0-5 PPM

Iodine 00-1037* 0-10 PPM 0-5 PPM 0-200 PPM

Ozone 00-1008* 0-1 PPM 0-1 PPM 0-5 PPM

Ozone 00-1009* 0-10 PPM 0-5 PPM 0-200 PPM

Ozone 00-1358 0-1000 PPM 0-200 PPM 0-1000 PPM

Range

Range

(continued on next page)

Revision N (7/15) 6

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

7

ACID GASES

Hydrogen Bromide 00-1455* 0-20 PPM 0-10 PPM 0-200 PPM

Hydrogen Chloride 00-1017* 0-10 PPM 0-10 PPM 0-200 PPM

Hydrogen Cyanide 00-1018* 0-10 PPM 0-10 PPM 0-200 PPM

Hydrogen Fluoride 00-1019* 0-10 PPM 0-10 PPM 0-200 PPM

Hydrogen Sulfide 00-1020* 0-50 PPM 0-10 PPM 0-500 PPM

Hydrogen Sulfide 00-1469 0-500 PPM 0-200 PPM 0-1000 PPM

Nitrogen Dioxide 00-1022* 0-10 PPM 0-10 PPM 0-200 PPM

Sulfur Dioxide 00-1023* 0-10 PPM 0-10 PPM 0-200 PPM

General Acid Gases 00-1038* 0-10 PPM 0-10 PPM 0-200 PPM

HYDRIDE GASES

Arsine 00-1024 0-1000 PPB 0-500 PPB 0-2000 PPB

Arsine 00-1025 0-10 PPM 0-10 PPM 0-200 PPM

Diborane 00-1026 0-1000 PPB 0-500 PPB 0-2000 PPB

Diborane 00-1027 0-10 PPM 0-10 PPM 0-200 PPM

Germane 00-1028 0-1000 PPB 0-500 PPB 0-2000 PPB

Germane 00-1029 0-10 PPM 0-10 PPM 0-200 PPM

Hydrogen Selenide 00-1030 0-1000 PPB 0-500 PPB 0-2000 PPB

Hydrogen Selenide 00-1031 0-10 PPM 0-10 PPM 0-200 PPM

Phosphine 00-1032 0-1000 PPB 0-500 PPB 0-2000 PPB

Phosphine 00-1033 0-10 PPM 0-10 PPM 0-200 PPM

Phosphine 00-1034 0-1000 PPM 0-200 PPM 0-2000 PPM

Silane 00-1035 0-10 PPM 0-10 PPM 0-200 PPM

Silane 00-1285 0-1000 PPB 0-500 PPB 0-2000 PPB

*Corresponding C18 gas generator available for standard range of sensor, and lower.

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Sensor Type

Gas Type

Range

Response Time

Accuracy

Repeatability

Linearity

Zero Drift

Sp

an Drift

Analog Output

Serial Interface

Power

Alarm Relays

Relay Coil

Enclosure

Auto

-

Test Option

Display

Controls

Operating Temp.

Weight

SPECIFICATIONS

Table 2. Specifications

Electrochemical cell
Select from list (see Table 1)
User adjustable within limits of selected sensor (see Table 1)
Sensor dependent
Generally ±10% of value, but limited by available calibration gas accuracy.
±1% (Electronic)
±0.5% (Electronic)
Less than 2% full scale per month
Dependent on operating environment but generally less than 3% per month
4-20 mA, 600 ohms max. at 24 VDC
HART® (1200 baud modem interface), Modbus®1200-9600,14.4k, 28.8k – RS232 or RS485,

user configurable)
Class 2 power source as follows:

Regulated 12 - 30 VDC; 25 mA maximum in loop-powered mode, 250 mA maximum in 3-wire
mode.

Three SPDT relays:
5A @ 230 VAC resistive; 5A @ 30 VDC resistive

Programmable either normally energized or normally de-energized
Explosion-proof, Class 1, Div. 1, Groups B, C, & D.
Dependent on sensor gas type and programmed range (see Table 1)
Graphics LCD, 96w x 32h, back-lighted in 3-wire mode
Four button, non-intrusive (magnetic switches); remote alarm reset input

-30° to +60° C (Min. temp. for O2 sensor is –10° C)
4 Lbs (1.8 Kg.)

Revision N (7/15) 8

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Screw

MECHANICAL MOUNTING

Transmitter

Figure 2 shows the
dimensions of the
transmitter enclosure and
the location and size of
the electrical conduit
connection. In locations
classified as hazardous,
the transmitter housing must be earth grounded, and an explosion-proof seal must be installed as
required by the local electrical code. The conduit or cable gland entry into the enclosure must be
sealed. If conduit is used, it must also be sealed internally at the housing entry. This is required to
prevent condensation from draining into the enclosure.

Secure the transmitter to a wall or flat surface through two mounting holes in the enclosure, as shown in
Figure 2. If appropriate fasteners are used, the transmitter may be supported by conduit alone.

Housing Ground

INSTALLATION

HAZARDOUS LOCATIONS

Connect housing to earth ground. Use explosion

proof conduit, and seal it inside and out.

Follow national, state, and local, electrical codes.

Seal conduit inside and out to keep out water.

Follow national, state, and local, electrical codes.

D12 GAS TRANSMITTER

Figure 2. Overall dimensions

Revision N (7/15) 9

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

H10 Sensor Duct-Mount Option

The H10 sensor duct mount option allows H10 Smart Sensors to be installed in a duct or pipe, and
provides easy access to the sensor for service.

The assembly is comprised of a special H10 sensor holder (Figure 3) that slides into the hollow duct
mount adapter (Figure 4). The adapter has 1-1/2” MNPT threads on the insertion end, for securing it to
the duct or pipe, and a barb fitting for supplying calibration gas to the sensor. An interface cable is
provided to connect the sensor holder to the transmitter. Note that a mating flange for securing the
adapter is not provided.

As shown in Figure 5, screw the adapter to the duct or pipe so the barb fitting is accessible to connect
gas tubing. Once the adapter is in place, slide in the sensor holder, lock it in place, and connect the
interface cable. It is recommended that the sensor not be installed in the holder until you are ready to
start the transmitter. This is especially true during construction when excessive dust and dirt may be
blowing through the duct system, and otherwise foul the sensor.

Figure 3. Duct-mount sensor holder

Figure 4 Duct Mount Sensor Exploded View

Revision N (7/15) 10

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Figure 5. Duct-mount adapter

Revision N (7/15) 11

Figure 6. Duct-mount assembly

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Please be aware of the hidden ribbon cable that connects the top

Set switch SW5 to OFF before removing the upper board stack from

Display Board

Board

Ribbon Cable

Isolation Board

ELECTRICAL CONNECTIONS

Board Stack

The transmitter consists of four circuit boards, known collectively as the “stack”. From top to bottom,
they are the, Display, CPU, Isolation, and Power Supply boards. The top three boards, Display, CPU,
and Isolation, are fastened together with metal standoffs, and plug into the Power Supply board, which
is fastened to the lower housing with similar metal standoffs. Since most external wiring connections
are made to terminals on the Power Supply board, it will be necessary to remove the top three boards.

three boards to the sensor. This cable is just long enough to permit

the top boards to come free from the housing, but no further.

To remove the top boards, unscrew the transmitter housing cover and turn off the power switch, SW5,
located at the 12 o’clock position on the CPU board. Grasp the outer edge of the metal faceplate
covering the Display board and gently rock it side to side, while pulling it up, and away from the
housing. Once the top boards come free, lift them out and disconnect the sensor ribbon cable (note: this
connector is keyed for ease of reconnecting later).

the transmitter. Since SW5 does not disconnect power at the

terminals of the Power Supply Board, declassify hazardous areas

prior to opening the transmitter housing.

Disconnect sensor
ribbon cable on
bottom of board stack.

Power Supply

Figure 7. Separating the board stack

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Power Supply Board Connections

Electrical connections are made to terminal blocks on the Power Supply board. Power, current loop,
(optional) digital communications, and remote alarm reset, are connected at TB1. Connections to the
three (optional) relays are made at TB2.

Current loop operation requires 12-30 VDC power supplied on the mA(+) terminal, from which the
transmitter sources a 4-20mA current loop output signal on the mA(-) terminal. The transmitter can
operate from current loop power alone, but without relays, LCD backlighting, and RS232/RS485
communications.

Loop-powered operation requires a
maximum current of 25 mA, while
transmitters wired in 3-wire mode
will require a maximum of 250
mA, with all relays active. Power
supplies operating multiple units
should be sized for twice the
calculated current requirement to
allow for start-up inrush current
requirements.

Figure 8. Power Supply Board Connections

The transmitter has limited space for wire; therefore, use the smallest gauge wire available that is
compatible with electrical code and current requirements. When powering a group of transmitters in 3­wire mode from the same power supply, 12 AWG wire is recommended for long runs, with drops of
higher gauge wire to each transmitter.

Internal relays are best used as pilot relays if heavy load switching is desired. Use suitable arc
suppression devices across loads switched through internal relays.

The transmitter housing is normally grounded through explosion proof conduit. In the absence of such
conduit, use a suitable grounding strap to bond the transmitter’s housing to earth ground.

Always follow wiring practices governed by local, state, and national electrical codes.

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

terminals.

External Connections

ATI A17/B14 Monitor(s), 2-Wire Mode

D12 (toxic gas) transmitters may be connected in 2-wire mode to an ATI A17/B14 receiver system. In
2-wire mode, transmitters will not include alarm relays, LCD backlighting, or RS232/RS485
communication options. Consult the A17 Power Supply and B14 Receiver Module O&M manuals to
properly size power supply requirements.

Analytical Technology, Inc.

Revision N (7/15) 14

Loop supply voltage must

not drop below 12V, as

measured at transmitter

Figure 9. ATI A17/B14 Monitors, 2-wire

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

terminals.

ATI A17/B14 Monitor(s), 3-Wire Mode

D12 transmitters may be connected in 3-wire mode to an ATI A17/B14 receiver system. In 3-wire
mode, transmitters will include alarm relays, LCD backlighting, and RS232/RS485 communication
options. Consult the A17 Power Supply and B14 Receiver Module O&M manuals to properly size the
system power requirements.

Analytical Technology, Inc.

TOXIC Gas Transmitter

Primary supply voltage

must not drop below 12V,

as measured at transmitter

Figure 10. ATI A17/B14 Monitor(s), 3-Wire Mode

Revision N (7/15) 15

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

24

-

+

TB1 TB1

+

-

Power Only, No Output Options

If there are no output options, transmitters may be powered from a single, primary supply as shown.
Size each power supply according to the number of transmitters, the current demand of each (see
specifications), and the wire resistance. The wire resistance must not be allowed to drop the primary
supply voltage below 12V at the primary supply terminals of any transmitter. Hint: If possible, use 12­14 AWG wire on primary supply connections (shown in bold), keep the number of transmitters low,
and verify the voltage on the on the transmitter furthest from the supply.

Primary Supply

12 to 30 VDC

Class 2 Power

Source

Primary Supply Voltage
(12v Minimum)

Figure 11. Power Only, No Output Options

Revision N (7/15) 16

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

+

-

Multichannel Current

Loop Receiver with

(Channels are

typically not isolated

- +

0.0

-

+

24

Sig

TB1

- +

0.0

Sig

TB1

Current Loop Receiver, Single Supply (2-Wire Mode)

The transmitter will source current to a loop receiver in 2-wire mode, as shown. A single power supply
provides loop power, which is sufficient to power the transmitter, but without relays, LCD backlighting,
and RS232/RS485 communications. Size each power supply according to the number of transmitters,
the loop powered current demand of each (see specifications), and the wire resistance. The wire
resistance must not be allowed to drop the Loop Supply Voltage below 12V at the terminals of any
transmitter.

Integral 24V Supply

from supply)

Loop Supply Voltage

(12v Minimum)

Figure 12. Current Loop Receiver, Single Supply (2-Wire Mode)

Revision N (7/15) 17

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Multichannel Current

Loop Receiver with

(Channels are

typically not isolated

-

+ 0.0 - +

24

Sig

TB1

- +

0.0

Sig

TB1

Current Loop Receiver, Single Supply (3-Wire Mode)

The transmitter will source current to a loop receiver as shown. A single power supply provides both
primary and loop power to the transmitter. Size each power supply according to the number of
transmitters, the current demand of each (see specifications), and the wire resistance. The wire
resistance must not be allowed to drop the Primary Supply Voltage below 12V at the terminals of any
transmitter. Hint: if possible, use 12-14 AWG wire on supply connections (shown in bold).

Integral 24V Supply

from supply)

Primary Supply Voltage

(12v Minimum)

Figure 13. Current Loop Receiver, Single Supply (3-Wire Mode)

Revision N (7/15) 18

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

I M P O R T A N T

Supply Voltage at terminals

Hint: Use 12 AWG wire on

Primary supply connections

to minimize voltage drops.

Select a Primary Supply with a

2

-

Primary Supply Voltage

Loop Supply Voltage

(Vprimary >= Vloop>=12V )

+ +

- +

0.0

-

+

0.0

- +

24

TB1 TB1

30.0

Current Loop Receiver, Dual Supplies (4-Wire Mode)

To reduce the power requirement of a single current loop supply, the transmitter may be powered from
both a primary and loop supply, providing the following conditions are met.

1. Supply grounds are directly connected to minimize ground loops, and,

2. The Primary Supply Voltage is at least 12V, and must be equal to, or exceed, the Loop Supply

Voltage, as measured at instrument terminals.

Size each power supply according to the number of transmitters, the current demand of each (see
specifications), and the wire resistance. The wire resistance must not be allowed to drop the Primary
Supply Voltage below the Loop Supply Voltage, which must be at least 12V, as measured at the
terminals of any transmitter. Hint: select a Primary Supply with a higher voltage output than the Loop
Supply, and use 12-14 AWG wire, if possible. Keep the number of transmitters supplied by the
Primary Supply low, and verify the voltages at the terminals of the transmitter furthest from the Primary
Supply.

Primary Supply

24 to 30 VDC

Class 2 Power

Source

Figure 14. Current Loop Receiver, Dual Supplies (4-Wire Mode)

Multichannel Current Loop Receiver with Integral 24V Supply

(Channels are typically not isolated from supply)

Primary Supply Voltage

must not drop below Loop

of any transmitter.

Sig

Sig

1

higher voltage output, and,

Connect supply commons to
minimize ground loops and
voltage drops that might
reduce the Primary Supply
Voltage below the Loop
Supply Voltage, at transmitter.

Revision N (7/15) 19

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

-

+

TB1

Bell202

DCS or SCADA System

(primary master)

d Communicator

-

+

0.0

+

Gnd

Sig

24

analog output resistance stated

- +

24

HART Transmitter, Point-to-Point (2-Wire)

The HART “Point-to-Point” connection permits the transmitter to communicate digitally, while
retaining the functionality of its 4-20mA current loop. Setting the transmitter’s polling address to 0
permits the current loop to function normally. According to HART specifications, the current loop
must be terminated with a load resistor between 230 and 1100 ohms; however, transmitter
specifications restrict the maximum analog output resistance to a lower value (see Specifications). The
term, “active source”, refers to a transmitter that is not loop powered, and sources current from power
applied to it on separate terminals. Size the power supply according to the number of transmitters, the
current demand of each transmitter (see specifications), and wire resistance. Wire resistance must not
be allowed to drop the Primary Supply Voltage below 12V at the terminals of any transmitter. Hint:
use at least 14 AWG wire on supply connections (shown in bold).

Hand-hel

(secondary master)

Loop Supply Voltage

(12v Minimum)

Primary Supply

12 to 30 VDC

Class 2 Power

OR

Load Resistor for
Digital Signaling Only

Modem

Optional

Barrier/Isolator

for Hazardous

Figure 15. HART Transmitter Operation, Point-to-Point (2-Wire)

Current Loop Receiver/Alarm
Module with Integral 24V Supply
For Digital and Analog Signaling

Channels are typically not
isolated from the supply, and
must include appropriately
sized load resistor between
230 ohms, and the maximum

in the transmitter specifications.

Revision N (7/15) 20

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

-

+

TB1

Bell202

held Communicator

-

+

0.0

- +

- +

24

24

stated

HART Transmitter, Point-to-Point, Active Source (3-Wire)

The HART “Point-to-Point” connection permits the transmitter to communicate digitally, while
retaining the functionality of its 4-20mA current loop. Setting the transmitter’s polling address to 0
permits the current loop to function normally. According to HART specifications, the current loop
must be terminated with a load resistor between 230 and 1100 ohms; however, transmitter
specifications restrict the maximum analog output resistance to a lower value (see Specifications). The
term, “active source”, refers to a transmitter that is not loop powered, and sources current from power
applied to it on separate terminals. Size the power supply according to the number of transmitters, the
current demand of each transmitter (see specifications), and wire resistance. Wire resistance must not
be allowed to drop the Primary Supply Voltage below 12V at the terminals of any transmitter. Hint:
use at least 14 AWG wire on supply connections (shown in bold).

Load resistor required for

digital signaling, only

DCS or SCADA System

(primary master)

Hand-

(secondary master)

Primary Supply Voltage

(12v Minimum)

Primary Supply

12 to 30 VDC

Class 2 Power

Source

Modem

Barrier/Isolator

for Hazardous

Figure 16. HART Transmitter Operation, Point-to-Point (3-Wire)

OR

Optional

Current loop receiver/alarm module

with integral 24V supply

for digital and analog signaling

Sig

Channels are typically not
isolated from the supply, and
must include appropriately
sized load resistor between
230 ohms, and the maximum
analog output resistance
in the transmitter specifications.

Revision N (7/15) 21

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Bell202

-

Primary/Loop

+

TB1 TB1

1

- +

24

N

IR Sensor Versio

ns)

1

The HART multi-drop connection permits up to 15 transmitters to communicate digitally on the same
bus, but at the cost of analog current signaling. Setting the transmitter’s polling address from 1 to 15
fixes the current loop output at 4mA. According to HART specifications, the current loop must be
terminated with a load resistor between 230 and 1100 ohms; however, transmitter specifications restrict
the maximum analog output resistance to a lower value (see Specifications). The term, “active source”,
refers to a transmitter that is not loop powered, and sources current from power applied to it on separate
terminals. Size the power supply according to the number of transmitters, the current demand of each
transmitter (see specifications), and wire resistance. Wire resistance must not be allowed to drop the
Primary Supply Voltage below 12V at the terminals of any transmitter. Hint: use at least 14 AWG wire
on supply connections (shown in bold).

DCS or SCADA System

(primary master)

Primary Supply

12 to 30 VDC

Class @ Power

Source

Load Resistor for
Digital Signaling Only

Modem

Barrier/Isolator

for Hazardous

N x 4mA

4mA

2-Wire Transmitter
(H10 Sensor Version, Only)

Figure 17. HART Transmitter Operation, Multi-drop

Loop Powered (2-Wire) and Active Source (3-Wire)

(Required)

Optional

Hand-held Communicator

(secondary master)

Supply Voltage

(12v Minimum)

3-Wire Transmitter
(H10, Cat. Bead, and

4mA

Revision N (7/15) 22

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

A(

+ -

24

TB1

N

TB1

(furthest from master)

1

A(

A(

RS485

master.

RS232

-to-

RS485 Adapter

RS485

-

+ 0

Modbus RS485 Multi-drop

RS485 operation requires the transmitter to be wired in 3- or 4- wire mode. Modbus permits up to 247
devices to communicate digitally on the same bus; however, RS485 limits this to 32. Request the D12
Transmitter Modbus Interface Manual for complete details on the Modbus interface.

DCS, SCADA, or

Computer System

(Modbus master)

Primary Supply

12 to 30 VDC

Class 2 Power

Common
B(+)

-)

Common
B(+)

3-Wire Transmitters

Install RS485 Unterminated jumper
block on all CPU boards except on
transmitter furthest from master.

Figure 18. Modbus RS485 multi-drop connections

-)

Unterminated

Primary Supply Voltage
(12v Minimum)

Install RS485 jumper block
on transmitter furthest from

Common
B(+)

-)

3-Wire Transmitter

Revision N (7/15) 23

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

+

- 24

TB1

block on CPU board.

5 3 2

-

+

Computer RS232

RS232 operation requires the transmitter to be wired in 3- or 4- wire mode. See Printing Data Log
Reports in Appendix A.for details on sending the data log to a printer or computer. Request D12
Transmitter Modbus Interface Manual for complete details on the Modbus interface.

DCS, SCADA, or

Computer System

(Modbus master or

terminal program)

Primary Supply

12 to 30 VDC

Class 2 Power

Source

Figure 19. Computer RS232

DB9 Female

Primary Supply Voltage

(12v Minimum)

Install RS232 jumper

Sig.Gnd
Rx
Tx

3-Wire Transmitter

RS232

Revision N (7/15) 24

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Remote Sensor Wiring

The figure below shows the wiring of the remote sensor option, which allows separation of the
transmitter and sensor by up to 50 feet. Interconnect cable is sold separately. Connections are made to
terminal blocks in the transmitter and J-box (junction box) assembly. The sensor/generator housing is
threaded into the J-box, and connected to a 14-position header. Do not allow exposed wires contact
each other, the printed circuit boards, or any components.

Recommendation: run cable

Through metal conduit.

D12 GAS TRANSMITTER

NOTE: When Optional Heated Sensor housing is ordered, 2 Cond. Wire must be used to
Connect from Junction Box to Transmitter or External 24V power Source. ATI can
supply 2 Cond. 20 Awg wire our part # (31-0008) sold as /ft. if requested. If connected
as a 2-wire device an customer supplied 24V power source must be used to supply
voltage required to make heater circuit functional. A 3 or 4-wire device can be hooked
to the transmitter as shown in Fig 22 on page 27.

Figure 20 - Remote H10 Sensor Wiring

Revision N (7/15) 25

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Duct-Mount Sensor Wiring

The figure below shows the wiring of the sensor duct-mount option, which allows the sensor to be
installed inside of a duct or pipe. The cable plugs into the rear of the sensor holder, and connects to a
terminal block in the transmitter. Do not allow exposed wires contact each other, the printed circuit
boards, or any components.

H10 Duct Mount
Sensor Holder

Figure 21 - Duct Mount Wiring

Revision N (7/15) 26

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Multichannel Current

Loop Receiver with

Integral 24V Supply

(Channels are

cally not isolated

from supply)

- +

0.0 -

+

24

Sig

TB1

Heater Option for Sensor/Generator Housing

The heater should be supplied with 24VDC to provide approximately 5.8W to the housing. This may
be derived from the transmitter supply in 3-wire mode, as shown below, or from a separate power
supply. Heater leads are polarity insensitive.

typi

To

Heated Sensor
Housing (03-0307)

Figure 22 - Optional Heated Sensor Wiring

To
+24VDC

Common

Revision N (7/15) 27

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Protocol

Interface

Jumper P

lug

Comments

I M P O R T A N T

location of pin 1

Pin 1

JP4

CPU Board Configuration

Install one jumper plug on
JP4 as prescribed by
communication interface.

If equipped with relays,
install the relay option
jumper on pins 3-4 of JP1.

Set switch SW5 to ON
before replacing the
housing cov

Table 3. Communication option jumpers

Jumper block on JP4
(see table above) Note

Figure 23. CPU Board configuration

On

After re-installing the
transmitter board stack, set
switch SW5 to ON before
replacing housing cover.

Install jumper on pins 3-4
of JP1 to enable relay
operation.

Label

HART Bell 202 N/A

Modbus RS232 “RS232” Use to connect one transmitter to a master device in a

Modbus RS485 “RS485” Use to connect up to 4 transmitters to a master device in a

Modbus RS485 “RS485

Unterminated”

ASCII RS232 “RS232” Use to connect one transmitter to a printer, or system

No plug required (okay to install any)

“point-to-point” configuration. See “D12 Modbus Manual”
for details.

“multi-drop” configuration. Each transmitter connection
biases and terminates the transmission line, as shown
below. See “D12 Modbus Manual” for details.

Use to connect more than 4 transmitters to a master
device in a “multi-drop” configuration. Transmitters are
connected without adding bias or termination. Install one
(terminating) “RS485” jumper plug on transmitter at
furthest end of transmission line. See “D12 Modbus
Manual” for details.

terminal (see Data logging section).

Revision N (7/15) 28

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Enter

Esc

OPERATION

OPERATOR INTERFACE

Interface Panel

The D12 operator interface is non-intrusive, so you do not have to remove the housing cover to view
the display, configure the transmitter, or calibrate the sensor. It features a backlighted*, 96x32 dot
LCD display, and four “keys”. The keys are implemented as four magnetic switches, each centered
below a graphic icon, and activated when a magnet is held approximately ¼” above the icon. The
transmitter is provided with a powerful, magnetic-screwdriver, designed specifically for activating the
switches through the housing’s thick, glass window. Throughout this manual, activating keys in this
manner is referred to as, “touching” the keys, even though it is not necessary to make physical contact.

Escape Key

(Magnetic Switch)

D12 GAS TRANSMITTER

LCD Display

(Magnetic Switch)

Up Key

Figure 24. Operator interface panel

The operator interface is organized into pages that consist mostly of text objects representing readings,
indicators, variables, functions, and links to other pages. Navigating the pages of objects is simplified
through the use of a “point-and-click” interface, using an arrow cursor that may be moved from one
object to the next by “touching” the up or down key. While the cursor is “pointing” at an object,
touching the magnet to the Enter key is said to “select” the object, and the action performed depends on
the type of object. If the object is a function, the Enter key executes the function. If a variable is
selected for editing, the Up and Down keys change its value, and the Enter key saves it. Touching the
Esc key aborts the edit and restores the previous value. If not executing a function, or editing a
variable, touching the Esc key returns to the previous page.

(* back-lighting available in 3- or 4-wire mode, only)

Enter Key
(Magnetic Switch)

Down Key
(Magnetic Switch)

Special Tool
(Magnetic-Screwdriver)

Revision N (7/15) 29

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Sensor Review

(Normal)

(New Type)

50

50

-

10.0

20.0

20.0

-

10.0

W

10.0

10.0

Model

number

Version

check

results

System clock

Alarm set point a

Data logger status

Generator information

0.0

OR OR

OR OR

OR

OR OR

Startup Review Sequence

When the transmitter starts, the display cycles through a series of pages to review the configuration of
the transmitter, sensor, and generator. Alarms are inhibited, and the output of the transmitter is held at

4.0 mA (17.4mA for Oxygen sensors). This state is maintained for 5 minutes to provide time for the
sensor readings to stabilize.

Startup Review

ATI Model D12
Tox Gas Monitor

►Hold Next Skip

Information

Self-

Version Info

HW=X.XX SW=X.XX

►Hold Next Skip

Transmitter

Self Check

►Hold Next Skip

setting

System Clock

MM/DD/YY HH:MM

►Hold Next Skip

Datalog Status
Logging is OFF

►Hold Next Skip

Auto-test status

Displays the date and time of
the next scheduled Auto-test
(if Status is READY). Date is
automatically adjusted when
past due, or within 24 hours
(see Auto-test)

►Hold Next Skip

MM/DD/YY

Pass

Monday

0 days of 11

AUTOTEST

Status=OFF

24.2 H2S
Range= 10 PPM
To 200 PPM
►Hold Next Skip

PPM
H2S
►Hold Next Skip

PPM
H2S
►Hold Next Skip

PPM
H2S
►Hold Next Skip

PPM
H2S
►Hold Next Skip

Datalog Status
Logging is ON
11 days of 11

24.2 H2S
10 PPM 1.00mA

0.00Hrs of 3.00

►Hold Next Skip

AUTOTEST

Status=READY

OR

09/12/06 10:15

►Hold Next Skip

Main Display

PPM
H2S

Figure 25. Startup review sequence

24.2 H2S
Range= 10 PPM

OR

To 200 PPM
►Verify Sensor

PPM
H2S
►Verify Range

PPM
H2S
►Verify C-Alarm

PPM

OR

H2S
►Verify W-Alarm

PPM
H2S
►Verify A-Alarm

Datalog Status
Logging is ON
11 days of 11
►Clear Datalog

OR

►Hold Next Skip

Cannot Autotest

►Cancel Fault

Gas Generator
Not Installed

Gas Generator
Not Installed

If the auto-test state is READY and the generator is
not installed, or is not compatible with the sensor type
and range, select “Cancel Fault” to force the auto-test
state to OFF. This is the default action if no action is
taken within 5 minutes.

Sensor Status
Not Installed

►Hold Next Skip

Programmed full
scale range

Caution alarm set
point and direction

Warning alarm set
point and direction

direction

Datalog is cleared
after installing new
type of sensor.

Gas Generator

Incompatible

Cannot Autotest

►Cancel Fault

Sensor
information

nd

Revision N (7/15) 30

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

I L A D S MENU

C F!

0.0

L MENU

----

2s

Main Display Page

The Main Display Page shows the name and concentration of the target gas, and units of measurement
(PPM, PPB, %, etc). Indicators on the left and below show alarm and operating status.

High Alarm Active Flag
Arrow indicates rising or falling
alarm. Select to manually reset and
view time of alarm.

Warning Active Flag
Arrow indicates rising or falling
alarm. Select to manually reset and
view time of alarm.

Caution Active Flag
Arrow indicates rising or falling
alarm. Select to manually reset and
view time of alarm.

Fault Active Flag
Select to identify fault condition(s).

Main Reading
Blanked to suppress display of
negative values, and may also
be blanked slightly above zero
(see Sensor )
Used to derive 4-20mA output

Main Display

PPM
H2S

Figure 26. Main display

Five-minute Time-out Rule

Most other pages are used for configuring the transmitter and sensor, and
have five-minute timeout. That is, after five minutes of no key activity,
the transmitter automatically returns to the Main Display page.
Exceptions to this rule include the zero and span calibration pages.

Esc

Esc Key Operation (Main Display Page)

Holding the magnet over the ESC key for 2 seconds, then removing,
toggles alarm inhibit mode on and off. If the alarm inhibit mode was off,
it is turned on for 15 minutes (default value). If alarm inhibit was on, it is
turned off immediately. Alarm inhibit mode is on when the “I” status
indicator is visible.

Fault Indication (Main Display Page)

Faults are indicated on the Main Display Page as shown in Figure 27.

Main Display

PPM
H2S

F!

Figure 27. Standard fault indication

Indicates concentration
Below 20% full scale

Indicates concentration
Above 100% full scale

Units of Measurement
PPM,PPB,%,%LEL

Name of Gas
Identifies the target gas species
being monitored.

Menu
Select to access menus.

Status Indicators

I=Alarm inhibit on
L=4-20MA loop locked
A=Autotest in progress
D=Data logger on
S=Security on (password req.)

Select each to view description.

Revision N (7/15) 31

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

0.0

Main Reading

The main reading represents the gas concentration value and appears on the Main Display, along with
the gas name, and units of concentration. It is reported on the 4-20mA output1, and is the PV (Primary

Main Display

PPM
H2S

concentration falls to –20% of the full-scale range, a fault alarm is generated. Blanking is typically
extended slightly above zero, as a means of stabilizing the main reading in the presence of excessive
external noise, or other environmental factors (see Sensor Setup Page).

During zero and span calibration, the “un-blanked” gas concentration value is displayed, primarily to
assess the amount of positive or negative drift. The “un-blanked” reading is also available on the
Modbus interface (request “D12 Transmitter Modbus Interface Manual”, for more information).

Variable) reported on the optional HART™ interface. It also appears at
register 40043 (D12_SYS_CONCBL) on the optional Modbus interface.

By default, the main reading is blanked to suppress the display of negative
values. That is, the reading is reported as zero if the concentration should dip
below zero, which can occur over time as a result of sensor aging. If the

1

The 4-20mA may not match the reading when the “L” status indicator is visible on the Main Display, or when the output is in

a physical limit.

Revision N (7/15) 32

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

brings up the edit cursor.

increments the value.

decrements the value.

previous value.

normal.

More

D MENU

0.0

Variable Editing

When a variable is selected, the edit cursor appears. The shape of the cursor symbolizes the up-down
scroll nature of the value being edited. To provide feedback about which key is being activated, the
cursor changes to a solid up-arrow when the magnet is touching the Up key, and to a solid down-arrow
when the magnet is touching the Down key. When the variable has been adjusted to the desired value,
touching the magnet to the Enter key changes the cursor to an hourglass shape while the program is
saving the new value (recalculating associated variables and updating non-volatile memories).
Touching the magnet to the Esc key discards the edited value and restores the original value.

1. Upon entry, the selection
cursor points to the first
variable for editing.

2. Touching the magnet to
the ENTER key selects the
variable for editing and

3. Touching the magnet to
the DOWN changes the edit
cursor to a down arrow and

4. Touching the magnet to
the UP key changes the edit
cursor to an up arrow and

Edit Mode

>Menu >Setup >Sensor

►Range = 50
Damping = 10
Blanking = 2.00
More

>Menu >Setup >Sensor

►Range= 50
Damping= 10
Blanking= 2.00
More

>Menu >Setup >Sensor

►Range= 45
Damping= 10
Blanking= 2.00

>Menu >Setup >Sensor

►Range= 55
Damping= 10
Blanking= 2.00
More

Increase

Decrease

>Menu >Setup >Sensor

►Range= 50
Damping= 10
Blanking= 2.00
More

>Menu >Setup >Sensor

►Range= 50
Damping= 10
Blanking= 2.00
More

Main Display

PPM
H2S

Figure 28. Variable editing

Save Value

5. Touching the magnet to
the ESCAPE key changes
the cursor and restores the

6. Touching the magnet to
the ENTER key changes the
cursor to the hourglass until

7. If left unattended for 5
minutes, operation reverts to

Revision N (7/15) 33

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

►Save Abort

SENSORS and GENERATORS

Sensor Setup

As mentioned, the D12 transmitter accepts a wide variety of H10 Smart Sensors, which configure the
transmitter with the name of the gas, the full-scale range, units of concentration, blanking, damping,
alarm settings, and data to assist the transmitter with transforming the sensor’s output signal into a
representation of gas concentration. For this reason, it is imperative to make certain the sensor and
transmitter are properly configured for your particular application.

Sensor Setup Page

>Menu >Setup >Sensor

►Range = 50
Damping = 10
Blanking = 2.00
More

Table 4. Sensor variables

Figure 29. Sensor setup page

Range

Damping

Blanking

More

The Range variable sets the 100% full-scale value of the transmitter, which
corresponds to the 20mA output value. Changing the range value also changes
the Blanking value, which is computed as a fraction of the range. In this version of
the transmitter, Range limits vary from sensor to sensor.

The Damping variable allows minor adjustment of the transmitter’s auto-damping
feature, used to stabilize readings. It is a unit-less value from 1 to 100, where a
value of 1 corresponds to a T902 response of approximately 20s, and 100 is a T90
of approximately 30s.

The Blanking variable is used to force the main reading to zero, whenever the gas
concentration is below the programmed value. In this version of the transmitter,
Blanking limits vary from sensor to sensor, but are typically 0 to 5% of the full
scale range. Note that the transmitter always performs negative blanking, even
when Blanking is set to 0.

The variable is recomputed when the Range variable changes, so that same
fraction of range is maintained. Doubling, or halving the Range variable, doubles
or halves the Blanking variable, respectively.

More is a link to an additional sensor information page (below).

The data-logger records readings as a fraction of the sensor range. If data-logging is turned on
(indicated by “D” status indicator on the Main Display), changing the Range variable causes a warning

Data-log Warning Page

WARNING
Changing this pa

message to appear prior to saving the value. Select “Save” to save the
new Range variable, or “Abort” to leave it unchanged.

< Changing this parameter will clear the datalog.>

Figure 30. Data-log warning page

2

T90 is the time required for the transmitter to reach 90% of its final value, after a step change in gas concentration.

Revision N (7/15) 34

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

D

----

F!

►Hold

00:59

Sensor More Page

>Menu >Setup >Sensor >More

►Cal_History
Test_History
Temp= 21.7°C

Table 5. Sensor “more” variables

Figure 31. Sensor “more” page

Cal_History

Test_History
Temp

Cal_History is a link to the Calibration History page (see Sensor Calibration
Records).

Test_History is a link to the Auto-test History page (see Auto-test History)

The Temp variable is the sensor temperature reading in degrees Celsius,
which may be adjusted up or down to achieve a temperature offset calibration.

Changing H10 Sensors and C18 Generators

H10 sensors and C18 generators may be “hot-swapped”, that is, removed and replaced with power
applied. To remove, rotate the sensor housing lock-ring ¼ turn clockwise (bottom view), slide the
molded carrier down, and carefully pull down on the sensor and/or generator body. To install, reload
the carrier, push it into the housing, and rotate the ring ¼ turn counter-clockwise (bottom view).

Removing Sensors

Removing the sensor with powered applied starts a 60 second count down timer, during which alarms
are inhibited, and the current loop output is fixed at 4.0mA (17.4mA for Oxygen sensors). This
“immunity” period should be long enough to reinstall the sensor, or install a replacement sensor. If
more time is needed, the count may be stopped indefinitely by selecting “Hold”, which causes it to
blink. A “Sensor Removed” fault will occur if a sensor is not installed before the timer expires. Figure
32 illustrates the display sequence associated with removing the sensor.

Sensor Removed

Sensor Removed

Main Display

PPM
H2S

Figure 32. Sensor removal

Installing Sensors

The transmitter maintains a copy of the previously installed sensor and compares the part numbers of
the new sensor with the old. If the part numbers match, the transmitter sequences the startup review as
normal, beginning with the sensor information3. If they do not match, review halts and waits for the

3

As a convenience during field replacement, the transmitter sets the new sensor’s full-scale range, blanking, damping, and
alarms to match the previously installed sensor. This could cause confusion when transferring sensors from field transmitters
to shop transmitters for calibration. During review, the shop transmitter will display the settings of the previously installed
sensor, which might not match the field transmitter. Fortunately, this is not a real problem. The sensor may be calibrated as

Revision N (7/15) 35

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

36

►Cancel Fault

00:59

0.0

Warning:

operator to verify the new sensor, full-scale range, and alarm settings4. The startup review is illustrated
in Figure 25.

If data logging is turned on (indicated by the “D” status indicator appearing on the Main Display), and
the sensor is replaced by one with a different part number, you will be prompted to clear the data log
during review.

Once the sensor is installed, the transmitter executes a 5-minute (typical value) warm-up period, during
which alarms are inhibited, the 4-20mA output is held at 4mA (17.4mA for Oxygen sensors), and Zero
and Span calibration are not permitted.

NOTE: Sensors can take as long as 12 hours to stabilize (bias) if not previously stored in the
sensor keeper.

Removing Generators

When a gas generator is removed, and the auto-test control is “READY”, the transmitter displays a
count down page similar to that for the sensor. Although the generator is not critical to the normal
operation of the transmitter, attempting to auto-test without a generator would certainly fail. Selecting
“Cancel Fault” forces the auto-test control to “OFF”, which occurs by default on expiration of the
timer. The auto-test control must be changed back to “READY” when a new generator is eventually
installed. The display sequence associated with removing the gas generator is illustrated in Figure 33.

Generator Removed

Gas Gen. Removed

Installing Generators

When a generator is installed, the transmitter sequences the startup review, beginning with the
generator information, as depicted in Figure 25. If problems with the gas type5 or range6 are detected,
they are announced during review, and the auto-test control is set to OFF.

Changing sensor types will clear the data log.

Startup Review

Datalog Status
Logging is ON
11 days of 11
►Clear Datalog

Generator Removed

Gas Generator
Not Installed

Cannot Autotest

►Cancel Fault

Figure 33. Generator removal

Main Display

PPM
H2S

normal, and when it is eventually returned to the field, the field transmitter will restore its original settings. Always verify
settings of field transmitters.

4

After verifying the sensor, the transmitter copies the sensor settings to its local memory.

5

Some generators produce a surrogate gas, instead of the sensor’s target gas (see Auto-test)

6

Some generators may not produce enough gas to pass Auto-test on higher sensor ranges (see Auto-test.

Revision N (7/15)

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

37

2s

Reminder:

Bump-Testing

“Bump-testing” refers to a test whereby the sensor is briefly exposed to gas in order to verify the
reading moves upscale from zero. It is recommended that it be performed at least once a month, using a
small amount of bottled span gas.

Exposing the sensor to any reactive gas could cause false alarms, and can be avoided by temporarily
inhibiting them. The most convenient method for doing so is from the Main Display, using the Esc key.
This also allows you to view the transmitter reading to verify the sensor’s response.

To quickly inhibit alarms…

Esc

Inhibit alarms before

bump-testing.

Hold the magnet over the ESC key for 2 seconds, and remove it. This
will toggle the alarm inhibit mode on for 15 minutes (default value),
hold the current loop at 4mA (17.4mA for Oxygen sensors7), and cause
the “I” and “L” status indicators to appear. Repeat the procedure when
finished with the bump-test, and verify the flags disappear. See
“Inhibiting Alarms” for more details.

7

Oxygen sensors are usually exposed to air continuously, and do not require bump-testing.

Revision N (7/15)

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Calibration

Calibration Frequency

While the transmitter itself requires no periodic calibration, H10 sensors should be “zero” and “span”
calibrated every 3-6 months, based upon environmental factors. Sensors frequently exposed to dirt, oil
mist, vapors, or very dry air, may require more frequent calibration.

Zero Calibration

As the name implies, zero calibration corrects the transmitter reading to zero in the absence of any
reactive gas. During zero calibration, the transmitter offset error is stored, and subsequently subtracted
from future readings. ATI recommends bottled zero gas as a source, which should be selected based on
the type of sensor. For example, bottled “Zero” Air may be used to zero Chlorine sensors, but Oxygen
sensors require bottled Nitrogen gas.

Span Calibration

The role of span calibration is to correct the transmitter reading to a known concentration of target gas
(the gas for which the sensor was designed to monitor). During span calibration, the transmitter
effectively stores the slope of the error, and divides it out of subsequent readings. Sensors for most
gases, such as Ammonia, require a bottled “span gas” source. This applies even to Oxygen sensors,
where the span gas source is bottled zero air.

Calibration Terminology

The zero calibration is referred to as, “zero”, “zeroing”, and “zeroed”. Likewise for the span
calibration, which appears as, “span”, “spanning”, and “spanned”. As with most instruments, zero
calibration should be performed before span.

Calibration Kits

Calibration kits, containing zero and span bottle gas sources, are available from ATI for many toxic
gases. Contact ATI, or your local ATI representative, if you have questions about calibration gas kits
or gas sources.

Indications During Sensor Calibration

The “un-blanked” gas concentration value is displayed during zero and span calibration, primarily to
observe any slight amount of positive or negative drift. In addition, alarms are cleared and inhibited,
and the 4-20mA output of the D12 transmitter is locked at 4.0mA (transmitters equipped with Oxygen
sensors are locked at 17.4mA, representing normal, 20.9% atmospheric Oxygen). The 4-20mA output
will not change when gas is applied and removed, and for 15 minutes thereafter (the default value).
While viewing the calibration pages, the LCD display will indicate the changing gas concentration.

Calibration Exceptions

Zero and span calibration are not allowed during the following conditions:

v Sensor removed, or in 5-minute8 warm-up period
v Transmitter fault is active
v Auto-test is active (“A” status indicator appears on Main Display page)

To help prevent errors, zero and span are not allowed if the sensor output, or span value entered, is too
high or too low. Memory errors are reported if detected while updating the sensor or transmitter
memory.

8

Typical value, may vary by sensor gas type.

Revision N (7/15) 38

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

-

0.0

2

0

Zero Calibration Procedure

Performing a zero calibration requires a bottled
“Zero-gas” with a 500 cc/min regulator, calibration
adapter, and a convenient length of ¼” tubing. The
gas used depends on the type of sensor installed. For
example, an H2S sensor may be zeroed with Zero-air,
while Oxygen sensors must be zeroed with Nitrogen.
In some cases, a sensor may be zeroed directly to the
atmosphere, but only when it is known to be free of
reactive gasses. Check with the factory if you are
uncertain about which gas to use.

Referring to Figure 34, push the calibration adapter
onto the exposed end of the sensor and connect one
end of the tubing (1), connect the other end of tubing
to the cylinder’s regulator (2). Do not open the gas
valve until instructed below.

From the Main Display, select Menu, then
Zero_Sensor, as shown in Figure 35. This will clear
and inhibit alarms at the transmitter, and hold the
current loop output at 4mA (17.4mA for Oxygen
sensors).

>Menu

►Zero_Sensor

Span_Sensor

View_Log

Setup

>Zero_Sensor

PPM
H2S
►Zero Undo

Figure 35. Zero_Sensor page

Open the regulator to flow Zero-gas to the sensor. After approximately four minutes, select Zero. The
“Cal” message will appear briefly at the bottom of the page and the reading will be forced to 0, 0.0, or

0.00. Since the reading is not blanked, it may show a negative sign, like “-0.0”, which is normal. The
procedure may be cancelled by selecting Undo. The Undo function is only possible while remaining on
the Zero_Sensor page. Leaving the page will disable the possibility of canceling the calibration.

Touch the Escape key twice to leave the Zero_Sensor page and return to the Main page. By default,
alarms will remain inhibited, and the current loop fixed for 15 more minutes (the default value).

D12 GAS TRANSMITTER

1

Figure 34. Zero calibration

Revision N (7/15) 39

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

0.0

24.8

25.0

>Span Sensor

2

0

Span Calibration Procedure

Span calibration* requires a bottled “span-gas” with a
500 cc/min regulator, calibration adapter, and a
convenient length of ¼” tubing. The gas type and
concentration used depends on the type of sensor
installed. Check with the factory if you are uncertain
about which gas to use.

Referring to Figure 36, slip the calibration adapter
onto the exposed end of the sensor and connect one
end of the tubing (1), connect the other end of tubing
to the cylinder’s regulator (2). Do not open the gas
valve until instructed below.

* Perform the Zero calibration prior to the Span
calibration.

From the Main Display, select Menu, then
Span_Sensor, as shown in Figure 37. This will clear
and inhibit alarms at the transmitter, and hold the
current loop output at 4mA (17.4mA for Oxygen
sensors).

>Menu

Zero_Sensor
►Span_Sensor
View_Log
Setup

>Span Sensor

PPM
H2S
►Span Undo

Figure 37. Span_Sensor page

Open the regulator and allow span gas to flow to the sensor. The displayed reading should begin to
increase, and stabilize after 5 to 10 minutes, depending on the gas type and range of the sensor.

>Span Sensor

PPM

H2S

►Span Undo

Select Span, the concentration reading will become fixed, and the blinking
Up/Dn edit cursor will appear just to the left of the reading. Touch the Up or
Down key to correct the reading to match the known concentration of gas,
then touch Enter.

The ‘Cal’ message will appear briefly at the bottom of the page. The

PPM
H2S
►Span Cal Undo

procedure may be cancelled by selecting Undo. The Undo function is only
possible while remaining on the Span_Sensor page. Leaving the page will
disable the possibility of canceling the span calibration.

Touch the Escape key twice to leave the Span_Sensor page and return to the Main page. Disconnect
the calibration adapter from the sensor and permit the readings to return to zero. By default, alarms will
remain inhibited and the current loop fixed for 15 more minutes (the default value). Once the reading is
below any of the alarm set points, you may terminate the alarm inhibit (and fixed loop output) using the
Esc key on the Main Display, see Esc Key Operation (Main Display Page).

D12 GAS TRANSMITTER

1

Figure 36 Span calibration

Revision N (7/15) 40

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

For best results, pressure in the pipe

or duct should be neutral, or slightly

Calibration of Duct-Mount H10 Sensors

To Zero and Span calibrate a duct-mounted H10 sensor; pull the sensor out of the duct until the
calibration locking pin clicks into the retaining slot. By pulling back slowly, the retaining pin will drop
into place and automatically locate the sensor just behind the gas inlet port. Connect a length of tubing
from the gas regulator to the barb fitting, and then follow the zero and span calibration procedures
detailed earlier.

negative. Positive pressure may restrict the flow of calibration gas to the

sensor, resulting in an inaccurate calibration.

Figure 38. Calibration of duct-mount H10 sensors (ATI-0664)

Revision N (7/15) 41

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Sensor Calibration Records

A calibration record is written into the sensor memory each time a zero or span calibration is
performed, and when a calibration Undo is performed. Enough memory is reserved for 63 zero
calibrations and 63 span calibrations. Zero and span calibration records are accessed on the
Cal_History page.

Zero calibration records are accessed on line 1, and are composed of an index number, date, and the
concentration reading just prior to performing the calibration. The concentration reading can be
thought of as the sensor “drift” from the previous zero calibration. Upon entry, the index number is set
to the most recent calibration and may be scrolled down to view earlier calibration records.

Span calibration records are accessed on line 3, and include an index number, date, and the relative
sensitivity of the sensor, in percent. Like the zero records, the index number is set to index the most
recent calibration and may be scrolled down to view earlier calibration records. Span calibrations
record the deviation from the reference sensitivity and display it in units of percent. Sensitivity is a
measure of the sensor output for a given exposure to gas. More specifically, it is defined as the ratio of
the signal output to the gas concentration and is often measured in µA/PPM. During manufacture, the
sensitivity of the sensor is recorded and used as a reference. A value of 100% signifies that the
sensitivity has not changed from the reference e.g., the sensor calibration is the same at it was when the
system was calibrated at the factory. Lower values indicate a decreased sensitivity and, although not
typical, higher values indicate increased sensitivity.

>Menu >Setup >Sensor

Range = 50
Damping = 10
Blanking = 2.00
►More

>More >Cal_History

Zero►1 09/12/06

0.0 PPM
Span 1 09/12/06
(Sens)= 100%

Figure 39. Sensor calibration history page

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Auto-test

The Auto-test option verifies the serviceability of the transmitter on a prescribed schedule by exposing
the sensor to a small amount of gas, and verifying a minimum response. Three attempts per test are
made, and if the sensor does not respond on the third attempt, a fault alarm is triggered (may be
optionally disabled). A summary of pass, fail, and retry counts are maintained in the sensor memory,
and may be viewed on the Auto-test History page.

The test is performed at a specific time of day, and may be scheduled to repeat every 1 to 14 days. The
date and time of the next test is available for editing, and the test may be triggered manually at any
time, without affecting the preset schedule.

During startup, the transmitter examines the date and time of the next scheduled Auto-test. If the
scheduled time and date has past, or if it is scheduled to occur within the next 24 hours, the transmitter
moves the date by one day to provide a minimum of 24 hours before the first (or next) test is performed.
This is done to allow sensors an additional “settling time”, and to avoid confusion to installers during
the commissioning period. Set the system clock to local time before scheduling the Auto-test time of
day.

The Auto-test option requires a C18 gas generator, which must be compatible with the installed
sensor’s gas type, and full-scale range.
lists gas compatible generators and sensors. Contact factory for a complete list.

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Table 6. Compatible generators and sensors

C18 Generator

Part No.

00-1239 Cl2

00-1240 NH3

00-1241 CO

00-1243 H2S

00-1244 SO2

* DMA (Dimethylamine) compatible on one range only.

Generator

Type

Compatible H10 Sensors

Sensor Type Part No. Min. Range Max. Range

Br

2

Cl

2

ClO

2

F

2

O

3

HF 00-1019 10 PPM 20 PPM
NO2 00-1022 10 PPM 20 PPM

I

2

Acid Gas 00-1038 10 PPM 20 PPM

NH3 00-1010 50 PPM 100 PPM
DMA* 00-1450 100 PPM 100 PPM

CO 00-1012 50 PPM 100 PPM
ETO 00-1039 20 PPM 50 PPM
HCOH 00-1040 20 PPM 50 PPM

H2S 00-1020 10 PPM 100 PPM
HCl 00-1017 10 PPM 100 PPM

SO2 00-1023 10 PPM 20 PPM
HCN 00-1018 10 PPM 20 PPM

00-1000
00-1001

00-1002
00-1003

00-1004
00-1005
00-1006
00-1007
00-1008
00-1009

00-1036
00-1037

1 PPM
5 PPM

1 PPM
5 PPM

1 PPM
5 PPM
1 PPM
5 PPM
1 PPM
5 PPM

1 PPM
5 PPM

5 PPM
20 PPM

5 PPM
20 PPM

5 PPM
20 PPM
5 PPM
20 PPM
5 PPM
20 PPM

5 PPM
20 PPM

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

Variables

Description

Auto-test Controls

Auto-test is controlled by the Status variable, which appears on the Auto-test page shown below.

>Menu >Setup >Auto-T

►Status=OFF
Setup NextAT
GasGen
History

Table 7. Auto-test control variables

Figure 40. Auto-test control page

Status

The variable Status may be set to one of three values:

OFF – Auto-test will not begin automatically
READY – Auto-test will occur on a regularly scheduled basis
START – Auto-test will run once after returning to the Main Display
page, and does not affect the preset schedule.

If a generator is not installed, Status will be forced to OFF, and may not be
changed to READY or START until one is installed.

Setting the Status variable to START will not begin a manual Auto-test until you
return to the Main Display page. This is designed to permit changes to the
setting, or other settings, before launching the Auto-test sequence.

Auto-test Setup

The Auto-test setup page configures the Auto-test schedule pass threshold, and options for various
transmitter indications.

>Menu >Setup >Auto-T >Setup

►Day_Interval= 1
▲Pass= 2.5PPM
Options

Figure 41. Auto-test setup page

Table 8. Auto-test setup variables

Day_Interval

▲Pass

The Day_Interval variable specifies the number of days between automatic tests.
The default is 1, and the limit is 1 to 14 (the exact time of day for testing may be
set on the NextAT page, see below).

The delta-Pass variable specifies the amount by which the gas concentration
must increase, in order to pass. Prior to starting the test, this amount is added to
the “un-blanked” gas concentration reading to compute the pass threshold value
that appears on the display (see

Auto-test Sequence). This value is limited between 5%(default value), and 10%
of the full-scale range (see Range in Table 4)

Options

Options is a link to the Auto-test Options page (below).

Revision N (7/15) 45

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

Auto-test Setup Options

>Menu>Setup>Auto-T>NextAT

►Log_Data=YES
Cause_Fault=YES
Override_mA=YES

The Auto-test Setup Options page variables control the behavior of the
transmitter during Auto-test.

Log_Data

Cause_Fault

Override_mA

The Log_Data variable controls values logged during Auto-test. When set to YES
(default), the gas concentration (main reading) is logged as usual, including any
increase caused by the gas generator. When set to NO, a code is logged that will
display as, “TEST”, on graphic and tabular report pages, and printouts.

The Cause_Fault variable determines if Auto-test failures cause transmitter fault
alarms. When set to YES (default), a failure to pass Auto-test after the third attempt
will cause a fault alarm, and force the 4-20mA output to the Fault_mA value,
regardless of how the test was initiated (automatic or manual). When set to NO,
Auto-test failures do not cause fault alarms (not recommended).

The Override_mA variable controls the 4-20mA output during Auto-test. When set
to YES (default), the 4-20mA output will be forced to the Autotst_mA value to
prevent receiver alarms (see 4-20mA Setup). When set to NO, the output will
increase as the gas concentration rises, and may cause receiver alarms (not
recommended).

Next Auto-test

>Menu>Setup>Auto-T>NextAT

The date and time of the next scheduled Auto-test appears on the
NextAT page. The time appearing on this page establishes the time of

Next Auto Test
►09/14/06 09:00

day for all future Auto-tests. After each Auto-test, the date will be
incremented by the Day_Interval variable on the Auto-test Setup page
(above). Note that if the Auto-test Status variable is set to READY, and

the next auto-test setting is deliberately (or unintentionally) scheduled in
the past, an Auto-test is immediately scheduled. This is apparent upon returning to the Auto-test
control page (above), and seeing the Status variable blinking START. At this point, you may change
the control to OFF, change the system clock, then change the control back to READY.

During startup, the transmitter examines the date and time of the next scheduled Auto-test. If the
scheduled time and date has past, or if it is scheduled to occur within the next 24 hours, the transmitter
moves the date by one day to provide a minimum of 24 hours before the first (or next) test is performed.
Set the system clock to local time before scheduling the Auto-test time of day.

Revision N (7/15) 46

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Auto-test History

>Menu>Setup>Auto-T>History

Passes= 267
Failures= 1
Retries= 2
►Reset(Y/N)=NO

The Reset function permits all counts to be zeroed. This is done by selecting Reset, and scrolling the
value to YES. Clearing the counts is not recommended, since this information can prove useful over
the lifetime of the sensor.

Gas Generator Information

>Menu>Setup>Auto-T>GasGen

11.1 Cl2

0.25PPM 0.26mA

0.07mAH Used
►Exit

display to the previous page.

Auto-test Sequence

When the Auto-test starts (automatically or manually), alarms are inhibited and by default, the loop is
fixed at 4mA (see Auto-test Setup Options and 4-20mA Setup). The transmitter will then step through
a series of displays representing the test sequence.

Alarm relays are inhibited during Auto-test, and for up to 10 minutes afterwards during the recovery
period. If a gas leak occurs during the recover period, will cancel the alarm inhibit and revert to normal
operation. A gas leak is presumed when the concentration rises to 50% of the full-scale range, or
higher.

While the alarms are inhibited during Auto-test, the 4-20mA output will usually be at a fixed level
(Override_mA=YES). The output override may be disabled by setting Override_mA=NO, however,
steps should be taken to disable receiver alarms in the control room.

The Auto-test History page provides a summary of passes, failures, and
retries, which are maintained in the sensor memory. Since three
attempts are made, there are always two retries before a failure is
recorded. The total number of tests is the sum of the passes and failures,
and the number of gas generations is the sum of all three values.

The Gas Generator page lists information about the C18 gas generator.
The top line contains the generator gas code and the chemical
abbreviation of the gas. The second line shows the delta-Pass value
(described on the Auto-test Setup), and the amount of current required
generate that particular concentration. The third line displays the mAH
consumption of the generator. Selecting the Exit function returns the

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Autotest PASS is

for the reading to return

Autotest reverts to either

Autotest FAIL is displayed if the

reading does not reach the pass

value after 3 attempts. Since some

gas may have been generated, this

y is held for 10 minutes while

0.0

AUTO TEST

0.0

AUTO TEST

AUTO TEST

AUTO TEST

AUTO TEST

T

AUTO TEST

AUTO TEST

AUTO TEST

AUTO TEST

0.0

PLEASE NOTE

to begin Auto

-

test.

Main Display

PPM
H2S

Auto-Test Page

►Start 00:00
Reading= 0.0PPM

Gas Conc
Greater Than
10% Range?

Auto-Test Page

►GENERATE 04:59
Reading= 0.0PPM
PassVal=0.25PPM

Auto-Test Page

►Pass 9:59
Reading=0.5PPM
PassVal=0.3PPM

Auto-Test Page

►READY 00:00
Reading=0.0PPM

Main Display

PPM
H2S

Message Page

Concentration …

Concentration too high

After one hour…

Auto-Test Page

►FAIL 1/3 59:59
Reading= 0.0PPM
PassVal=0.25PPM

If after 5 minutes of gas generation the reading is still below the pass value…

displayed for 10
minutes to allow time

to normal.

Auto-Test Page

►OFF 00:00
Reading=0.0PPM

Figure 42. Auto-test sequence

Main Display

PPM
H2S

After one hour…

Auto-Test Page

►FAIL 2/3 59:59
Reading= 0.0PPM
PassVal=0.25PPM

displa

READY or OFF at the
completion of the test (or when
the state is changed to STOP).

the gas dissipates.

Retry every minute for
1 hour and 30 minutes.

Auto-Test Page

►FAIL 3/3 59:59
Reading= 0.0PPM
PassVal=0.25PPM

Auto-Test Page

►Fail 9:59
Reading=0.0PPM
PassVal=0.3PPM

Revision N (7/15) 48

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

(least dangerous)

Toxic Gas

D MENU

0.0

ALARMS and RELAYS

Three gas concentration alarms and one fault alarm are standard in the D12 transmitter. Alarm status
flags appear on the Main Display, and status is available over the optional serial interface. Alarms may
be assigned to activate one or more of three optional relays (see Alarm Relays).

Gas Concentration Alarms

The gas alarms are labeled, Caution, Warning, and Alarm, and although not strictly enforced, Alarm
usually has the highest priority, followed by Warning and Caution. Figure 43 depicts the default
relationship between each alarm.

For toxic gas sensors, the typical default
setting for the Warning alarm is the TLV
(threshold limit value) of the target gas.
Alarm is usually set to 2 or 3 times higher
than the TLV, and Caution is typically used to
alarm on negative drift of –10% range or
more (a fault alarm occurs if the reading drifts
to –20% range, or below).

Figure 43. Default alarm relationships for toxic
gas sensors.

Normal atmospheric oxygen is 20.9%.
Oxygen sensor alarms default to: Warning

19.5%, Alarm 16%, and Caution 23%. Note
that Caution is used to trap positive sensor
drift.

Figure 44. Default alarm relationships for
oxygen sensors

Manual Alarm Reset

Alarms programmed for manual reset (see below) are held active, or latched, even after alarm
conditions have subsided, and are reset by selecting the respective flag (A,W, or C) on the Main
Display page. The Alarm Reset page appears and displays the date and time of the alarm. If alarm
conditions have subsided, you may reset just the selected alarm (Reset), or all alarms (ResetAll). A link
to the Alarm Inhibit page is provided for convenience.

Main Display

>A▲

PPM
H2S

Date=09/26/06
Time=18:11
►Reset ResetAll
Inhibit_Alarms

Figure 45. Manual alarm reset

Remote Reset

Grounding the “Remote Reset” input (see Figure 8) resets all latched alarms, if the respective alarm
conditions have subsided.

Highest level

alarm

(most dangerous)

Lowest level

alarm

(least dangerous)

O2

Lowest level

alarm

Highest level

alarm

(most dangerous)

Alarm

Warning

(Caution)

(Caution)

Warning

Alarm

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Conc. at Set Point

Alarm Becomes Active

Set

_Delay

Res_Delay

Conc. At Reset

Alarm Becomes Inactive

Conc. at Set Point

Alarm Becomes Active

Conc. at Reset Point

Alarm Becomes Inactive

Gas Alarm Operation

Figure 46 depicts relationships between variables associated with a rising gas alarm, and how they
function in the presence of a gas leak, and recovery.

Figure 47 depicts relationships between variables associated with a falling gas alarm (such as for
Oxygen deficiency), and how they function in the presence of a gas displacement, and recovery.

Set_Point

Res_Point

Res_Point

Set_Point

C
O
N
C
E
N

T
R
A

T

I
O

S e c o n d s

Figure 46. Rising alarm (Active=ABOVE_SP, Reset=AUTO)

C
O
N
C
E
N
T
R
A
T

I

Set_Delay

O

S e c o n d s

Figure 47. Falling alarm (Active=BELOW_SP, Reset=AUTO)

Res_Delay

Revision N (7/15) 50

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variable

Description

Gas Alarm Setup

Variables for the gas alarms are configured on the respective setup pages, as shown in Figure 48, and
described in Table 9.

►Alarm Relays
Warning Setup
Caution Test
Inhibit

>Alarm

Active=ABOVE_SP
Set_Point= 20.0
Res_Point= 20.0
►More

>Alarm >More >Warning >More

>Warning

Active=ABOVE_SP
Set_Point= 10.0
Res_Point= 10.0

►More

►Reset=MANU

Fault_Goto=HOLD
Set_Delay=0

►Reset=AUTO
Fault_Goto=HOLD
Set_Delay=0
Res_Delay=0

Figure 48. Alarm setup pages

Table 9. Alarm variables

>Caution

Active=BELOW_SP
Set_Point= -10
Res_Point= -10
►More

>Caution >More

►Reset=AUTO
Fault_Goto=HOLD
Set_Delay=0
Res_Delay=0

Active

Set_Point

Res_Point

The Active variable is used to specify the region of concentration where
the alarm is active. When set to ABOVE_SP, the alarm becomes active
at and above the set point (referred to as a rising alarm). When set to
BELOW_SP, the alarm becomes active at and below the set point
(referred to a falling alarm). Setting the value to DISABLED permanently
deactivates the alarm. The variable setting is stored in the sensor
memory.

The Set_Point variable defines the concentration level that the alarm
becomes active. The alarm becomes active immediately if the set delay
variable is 0, otherwise, it becomes active at the expiration of the set delay
period. When the set point is reprogrammed, the reset point value is also
reprogrammed to the same value.

The Res_Point variable defines the concentration level that the alarm
becomes inactive. Once the alarm is active, it will remain active until the
concentration level reaches the reset point. The alarm then becomes
inactive immediately if the set delay variable is 0, otherwise, the alarm
becomes inactive at the expiration of the reset delay period (only if the
reset variable is programmed as AUTO – see below). The limits for the
reset point are defined below.

Revision N (7/15) 51

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Active=ABOVE_SP
Upper limit = current set point value
Lower limit = lowest set point value

Active=BELOW_SP
Upper limit = highest set point value
Lower limit = current set point value

When the set point is reprogrammed, the reset point value is
reprogrammed to the same value.

Reset

Fault_Goto

Set_Delay

Res_Delay

The Reset variable defines how the alarm is permitted to transition from
active, to inactive. When the variable is set to AUTO, the alarm will
transition without operator intervention, as soon as conditions permit
(concentration reaches the reset point, and the reset delay period expires).
When the variable is set to MANU, the alarm conditions must have
subsided, and an operator must acknowledge the alarm manually, through
the operator interface, the serial interface, or through the remote reset
(see Electrical Connections, page 12).

Note: Res_Delay is operational for AUTO only. Setting the Reset variable
to MANU suppresses display of the Res_Delay variable.

The Fault_Goto variable specifies alarm behavior during transmitter faults,
and overrides all other alarm settings. If the fault alarm should become
active, you may program the concentration alarm to behave in one of three
ways:
HOLD - the transmitter will attempt to hold the alarm in its current state. If
the alarm is active, it will remain active. If the alarm is inactive, it will be
inhibited from becoming active until after the fault is cleared.
SET - activates the alarm immediately, the set delay period is ignored.
This feature permits the alarm to signal both concentration and fault
conditions.
RESET – deactivates the alarm immediately, the reset delay period is
ignored.

The set delay variable is used to configure the amount of time in seconds
that the concentration must be in the alarm active region before becoming
active. It may be used to avoid triggering alarms on relatively short gas
exposures. Also, it may be used to help prevent alarm relay chattering
when the concentration level is varying between the set point and reset
point. The variable may be programmed between 0 (its default) and 10
seconds.

The reset delay variable is only displayed when the Reset variable is set to
AUTO. It is used to configure the amount of time in seconds that the
concentration must be in the alarm inactive region before becoming
inactive. Like the set delay variable, it may be used to help prevent alarm
relay chattering and is preferred over using set delay. The variable may
be programmed between 0 (its default) and two hours (7200 seconds).

Revision N (7/15) 52

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Fault

Description

Corrective Action(s)

L

MENU

----

Fault Alarms

When a fault alarm occurs, the Main Display appears as shown below. By default, new alarms are
inhibited, and active alarms are held so that relays controlling lights, sirens, and fans may continue to
operate (this behavior may be modified on the Alarms Setup pages). Faults are permitted to clear
automatically, without operator intervention, if they do not persist.

Main Display

PPM
H2S

F!

Selecting the fault alarm flag causes the transmitter to display the fault code on line 1, and a description
of the problem(s) on line 2. Selecting the Next function causes line 2 to display the next fault, if any.

>Menu >F!

FAULT= 00000020
Sensor Removed
(See O&M Manual)
►Next

Corrective Actions

Transmitter faults may be caused by improper wiring, ground loops, power supply sizing, current loop
receivers, and other external factors.

1. At power on, transmitters can demand 2 or 3 times the normal amount of supply current. If the

supply is not sized properly, transmitters may not power on, or may produce a fault in the external
power supply. If this is suspected, try starting transmitters one at a time using switch SW5 on the
CPU Board.

2. Check that each transmitter has the proper supply voltage at TB1 on its Power Supply Board. The

D12 Toxic Gas Transmitter requires at least 12v in all wiring modes.

3. When troubleshooting, it is permissible to temporarily swap sensors, generators, and board stacks

with other transmitters. When finished, you MUST RE-VERIFY all transmitter settings, especially
sensor, alarm, and 4-20mA settings. Also note that swapping components may result in losing data
log records, since the log is dependent on sensor part numbers, and the full-scale range.

Table 10 lists transmitter faults and corrective actions.

Table 10. Fault descriptions

Figure 49. Fault alarm (Main Display)

Figure 50. Fault page

ADC0 Read Error

LCD Busy Error

The analog-to-digital converter channel
assigned to the sensor’s gas concentration
output signal has failed, or is out of range.

The LCD driver chip cannot recover from an
internal error.

Revision N (7/15) 53

1. Cycle power off and on

2. Replace sensor

3. Replace upper stack

4. Replace full stack

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

SPI Bus Error

ADC1 Read Error

Sensor (-)Range

Sensor Removed

Sensor Mem Error

Sensor Cfg Error

Gas Gen Removed

Gen Incompatible

System Mem Error

Alarm Mem Error

Operator Mem Err

HART Mem Error

Serial peripheral interface bus has faulted.

The analog-to-digital converter channel
assigned to the sensor’s temperature output
signal has failed, or is out of range.

The sensor has drifted -20% range (below
zero).

The sensor cannot be detected. 1. Reinstall sensor

One or more configuration variables in the
sensor memory do not pass checksum test.

One or more sensor configuration variables
are outside of expected range.

The generator cannot be detected. 1. Install generator

The gas generator is not compatible with
the installed sensor type or range.

A checksum error has been detected in the
system setup memory.

A checksum error has been detected in the
alarm setup memory.

A checksum error has been detected in the
operator setup memory.

A checksum error has been detected in the
HART setup memory.

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

1. Cycle power off and on

2. Replace sensor

3. Replace upper stack

4. Replace full stack

1. Zero sensor

2. Replace sensor

2. Cycle power off and on

3. Replace sensor

4. Replace upper stack

5. Replace full stack

1. Cycle power off and on

2. Replace sensor

3. Replace upper stack

4. Replace full stack

1. Cycle power off and on

2. Replace sensor

3. Replace upper stack

4. Replace full stack

2. Cycle power off and on

3. Replace generator

4. Replace sensor

5. Replace upper stack

6. Replace full stack

1. Replace generator

2. Change sensor range

3. Replace sensor

4. Replace upper stack

5. Replace full stack

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

1. Cycle power off and on

2. Replace upper stack

3. Replace full stack

Revision N (7/15) 54

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Autotest Failed

Use 3-Wire Power

Stack Overflow

Factory Cal Err

UNCALIBRATED

Fault Alarm Test

Auto-test failed after 3 attempts. 1. Replace generator

2. Replace sensor

3. Replace upper stack

4. Replace full stack

Relay option jumper is installed, but
transmitter is powered from loop (2-wire).

An internal error occurred in the CPU. 1. Cycle power off and on

An error has been detected in the factory
calibration memory.

This appears on the Main Display, in place
of the gas name, when the transmitter has
not been factory calibrated, or the
calibration memory has become corrupted.

This is not a real fault. This occurs when
the fault alarm is being tested locally, or
remotely.

1. If relays are not used, remove
jumper.

2. Re-wire transmitter in 3- or 4­wire mode.

3. Replace upper stack

4. Replace full stack

2. Replace upper stack

3. Replace the full stack

1. Cycle power off and on

2. Replace upper stack

1. Cycle power off and on

2. Replace upper stack

3. Replace the full stack

Revision N (7/15) 55

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

ALARM

WARNING

CAUTION

Fault

Remote Reset

FAULT

Logic

RL1 Failsafe

RL3 Failsafe

Tst

TstF

R S R S R

Tst

Tst

C

Active

A

W

Active

W

Active

Alarm Relays

The D12 transmitter provides three optional SPDT mechanical relays rated for 5 amps, non-inductive
loads at 250VAC. These relays are suitable for switching small loads, such as horns and warning
lights, but should not be used to switch motors or other high current, inductive loads.

Each relay is assigned to one of the four alarms, and may be programmed as normally energized
(failsafe), or normally de-energized. A normally energized relay will have electrical continuity between
its C and NO contacts (while the transmitter is powered on), and will be open between its C and NC
contacts. Conversely, a normally de-energized relay will have continuity between its C and NC
contacts, and will be open between its C and NO contacts. Figure 51 illustrates the function of alarm
and relay variables on the operation of the relays.

Gas

Alarm

Set_Point

A

Res_Point

A

SdlyA

RdlyA

S

Set_Point

W

Res_Point

Sdly

Rdly

W

W

Set_Point

C

Res_Point

C

C

SdlyC

RdlyC

RL2 Failsafe

Inhibit

Figure 51 Alarm relay schematic(default – no alarms active)

Relay Logic

(- - - user configurable)

Revision N (7/15) 56

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Caution: devices wired to the relays may activate

of 5 minutes. Notify proper authorities prior to performing this test.

Relays Setup

Relays are configured in the Relays Setup page, which is accessed by selecting Menu, Setup, Alarms,
and (Relays) Setup. Select the alarm trigger source (Alarm,Warning,Caution,Fault), and failsafe
property (Normal-On or Normal-Off).

Testing Alarm Relays

Relays are tested by triggering (simulating) their assigned alarms on the Relay Test page. To trigger an
alarm, scroll the “Select” variable up and down until an X appears below the letter representing the
alarm. Save the selection by touching the Enter key, and move the cursor to the function labeled
“Start”.

when “Start” is selected. Be sure to inform proper

When ready, select “Start” to begin the test. “Start” will be replaced by, “Any key to Stop”, and
touching any key will end the test.

Relay Test Page

>Menu >Setup >Alarms

Alarm Relays
Warning Setup
Caution ►Test
Inhibit

>Test

Warning: this wi
C W A F
►Select _ _ _ _
Start

>Test

>Menu >Setup >Alarms

Alarm Relays
Warning ►Setup
Caution Test
Inhibit

>Setup

Rly Alarm Normal
RL1►Fault On
RL2 Warning Off
RL3 Alarm Off

Figure 52. Relay setup page (example)

personnel before performing the test.

Warning: this will activate transmitter alarm relays for a maximum

>Test

Warning: this wi
C W A F
Select _ X X _
Start

Figure 53. Relay test page example

Warning: this wi
C W A F
Select _ X X _
>Start

>Test

Warning: this wi
C W A F
Select _ X X _
Any key to STOP

Revision N (7/15) 57

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

0.0

0.0

Inhibiting Alarms

Alarms should be inhibited to prevent false activation, such as done just prior to “bump-testing” the
sensor.

The most convenient method for temporarily inhibiting alarms is from the Main Display. Hold the
magnet over the ESC key for 2 seconds, and remove it. This will toggle the alarm inhibit mode on for
15 minutes, which will clear and inhibit alarms, hold the current loop at 4mA (17.4mA for Oxygen
sensors), and cause the “I” and “L” status indicators to appear. Repeating the procedure toggles alarm
inhibit mode off immediately, restores the current loop to normal operation, and clears the “I” and “L”
status indicators. Both the inhibit duration, and loop output, are programmable and may be accessed on
the Alarm Inhibit setup page (see below).

Figure 54. Inhibiting alarms from the Main Display

Alarm Inhibit Setup

Variables and controls associated with the alarm inhibit mode are accessible on the Alarm Inhibit setup
page (below), and are detailed in Table 11.

>Menu >Setup >Alarms >Inhibit

►Inhibit_mA= 4.0
Inhibit_Time=
15:00(mm:ss)
Start

Table 11. Alarm inhibit variables and controls

Main Display

PPM
H2S

Esc

2 Seconds

Figure 55. Alarm inhibit setup page

Main Display

PPM
H2S

Inhibit_mA

Inhibit_Time

Start (Stop)

The Inhibit_mA variable is output on the current loop during alarm inhibit. It ranges from 3.5
to 22.0 mA (this is the same value that appears on the 4-20mA Setup page).

Alarm Inhibit Off
The Inhibit_Time variable is the duration of the alarm inhibit mode, and is programmable
from 00:00 to 99:59 (mm:ss).

Alarm Inhibit On:
The variable counts down from its programmed duration. Selecting it temporarily freezes
the count and permits it to be scrolled up and down. If Enter is touched, counting resumes
from the new value. If Esc is touched, counting resumes at the previous value. These
changes are temporary, and are not saved as the programmed value.

The Start function turns on alarm inhibit, which clears and inhibits alarms, holds the current
loop at 4mA (17.4mA for Oxygen sensors), causes the “I” and “L” status indicators to
appear, and starts the Inhibit_Time variable to begin ticking down. The label then changes
to “Stop”, and selecting it again turns off alarm inhibit, restore the current loop to normal
operation, clears the “I” and “L” status indicators, and restores the Inhibit_Time variable to
its programmed value.

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

4-20mA Output

The 4-20mA output normally sources
positive current to a receiver, proportional to
the main reading. The output is 4 mA at zero,

24

and rises to 20mA at the full-scale range (see
“Range” variable in Sensor Setup Page), and

20

may go as high as 24mA (125% Range) in
case of gas flooding. Since the reading is
blanked below zero, the output should never
go below 4mA in the course of normal
operation.

16

12

mA

8

4

Figure 56. Current loop output plot

0

0 20 40 60 80 100

Output Overrides

By default, the output is forced to 3.6mA to signal fault alarms to the receiver. During alarm inhibit
and auto-test modes, the loop is fixed at 4.0mA (17.4mA for Oxygen sensors) to prevent false alarms at
the receiver. These are the default values, which may be changed on the 4-20mA Setup page shown in
Figure 57.

4-20mA Setup

Variables listed on this page are described in

>Menu >Setup >4-20mA

►Autotst_mA= 4.0
Inhibit_mA= 4.0
Fault_mA= 3.6
More

Table 12. 4-20mA variables

Figure 57. 4-20mA setup page

4-20mA Output

Autotst_mA= 4.0
Inhibit_mA = 4.0

Fault = 3.6mA

%Range

Autotst_mA

The Autotst_mA variable is the mA value output during Auto-test mode – to prevent
false alarms at the receiver. The default is 4.0mA (17.4mA for Oxygen sensors), and
is limited between 3.59 and 22.0 mA.

Inhibit_mA

The Inhibit_mA variable is the mA value output during the Alarm Inhibit mode – to
prevent false alarms at the receiver. The default is 4.0mA (17.4mA for Oxygen
sensors), and is limited between 3.52 and 22.0 mA.

Fault_mA

The Fault_mA variable is the mA value output during Fault alarms. The default is

3.6mA, and is limited between 3.5mA2 and 22.0mA. The value should be recognized
as a fault by the loop receiver.

More

More is a link to the 4-20mA control page.

9

Since the transmitter may be powered from the current loop, 3.5mA is the lower limit for all settings.

Revision N (7/15) 59

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

Warning:

4-20mA Control

The 4-20mA Control page permits adjustment of the analog output, and provides a method for
manually forcing it to a fixed value to overcome leakages, verify linearity, or test receiver alarms.

>Menu >Setup >4-20mA >More

►Adjust_4mA
Adjust_20mA
Force= 4.0mA

Figure 58. 4-20mA control page

Table 13. 4-20mA control variables

Adjust_4mA
Adjust_20mA
Force

The Adjust_4mA variable is used to adjust the 4mA level on the 4-20mA output.
The Adjust_20mA variable is used to adjust the 20mA level on the 4-20mA output.
The Force variable is used to force the 4-20mA output to a fixed value. While the

variable is not selected, the displayed value is updated to show the real-time output
level. The loop is fixed at the instant the variable is selected, and the value may be
scrolled up and down as desired, between 3.5 and 22.0 mA.

Loop Adjustment

Loop adjustment consists of adjusting the 4 and 20 mA levels (order does not matter) by scrolling the
corresponding DAC10 value. This may be accomplished by reading a current meter connected across
the mA(+) and mA(-) terminals of TB1 on the transmitter’s Power Supply Board, or reading the display
of a calibrated, current loop receiver.

Disable current loop receiver alarms before proceeding.

Select Adjust_4mA or Adjust_20mA and observe the following displays. Select DAC_Value and
scroll the displayed value up and down to achieve the desired output level, and touch Enter to save, or
Esc to exit without saving.

>Menu >Setup >4-20mA >More

>Adjust_4mA

>Menu >Setup >4-20mA >More

>Adjust_20mA

4-20mA_Output
Monitor the 4-20
►DAC_Value=23

4-20mA_Output
Monitor the 4-20
►DAC_Value=759

< Monitor the 4-20 while slowly
adjusting the DAC value.

Figure 59. Loop adjustment pages

(DAC values shown may not match)

10

Digital-to-Analog-Converter value ranging 0 to 1023 (10-bits). Adjustment is performed at factory, values will vary from

transmitter to transmitter. This range may increase on future versions.

Revision N (7/15) 60

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Sampling

Samples/Day

Days

Variables

Description

Data-log

The D12 transmitter data log records gas concentrations in one of 12 discrete intervals ranging from 1
to 60 minutes, providing data from 11 to 474 days. Table 14 details sampling intervals and the
associated metrics.

Table 14. Data-log sampling metrics

(Minutes)

1
2
3
4
5

6
10
12
15
20
30
60

1440 11

720 22
480 32
360 43
288 54
240 64
144 104
120 124

96 152
72 196
48 278
24 474

Gas concentration (see Main Reading) is recorded as an instantaneous value, and is not averaged or
filtered in any way. When the data log memory is filled, new records will overwrite older ones.

Data-log Access

The Data Log Access page provides links to the setup, review, and print pages, which are described
below.

>Menu >Setup >DataLog

►Setup
Review_Tabular
Review_Graphic
Print

Figure 60. Data log access page

Data-log Setup

>Menu>Setup>DataLog>Setup

►Sample= 1 mins
Sample/Day=1440
Max_Days= 11
Sampling=ON

Variables on the Data Log Setup page select one of the 12 discrete
sampling intervals listed in Table 14, and control starting, stopping and
clearing of the data-log.

Figure 61. Data log setup page

Table 15. Data-log setup variables

Sample,
Sample/Day,
Max_Days

Sampling

These variables are used to select one of the 12 sampling intervals listed in
Table 14. Each variable functions identically, and scrolling any one of the
variables updates the other two. Warning: changing the sampling interval will
clear the data-log.

The Sampling variable is used to control data recording, which starts when set to
ON, and stops when set to OFF. The data-log is cleared when set to CLR, after
which the control is returned to its previous value (ON or OFF).

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Special

Description

>Menu >

Setup >DataLog

>Menu >Setup >DataLog

(short

-

cut) >Menu >View_Log

Data may be displayed on the LCD graphically, or in a tabular report format. Data may also be output
to a terminal, terminal program, or serial printer. Dates formats are configurable as MM/DD or
DDMMM (see System Clock), and samples are displayed in the concentration units shown on the Main
Display Page.

In place of numeric data samples, a report may display special text to indicate samples were
unavailable, not yet sampled, or some condition prevented sampling.

Table 16. Data log special text

Text

---­FFFF
TEST
****

Data-log Graphic Report

>Review_Graphic

07/09 23:44 0.02

Upon entry, the cursor is parked at the most recent sample. Moving the cursor left displays the date,
time, and values of earlier samples (moving it right will show “- - - -“, not sampled yet). Touching the
Enter key switches to the Tabular Report page, shown below, and touching the Esc key returns to the
Menu page. Data is not plotted while viewing the page.

Data-log Tabular Report

>Review_Tabular

►Date=07/09/06
Time=23:44
Conc=0.02
Show_Graphic

Sample unavailable (transmitter powered off, or sample not yet recorded)
Fault alarm active at time of sample
Auto-test active at time of sample (if Log_Data=NO, see Auto-test Setup Options)
Data is corrupted, or unreliable

The Graphic Report page plots samples on the LCD from left to right,
where older samples are on the left, and newer samples are to the right.
Touching the Up and Down keys moves the vertical cursor line right
and left, respectively, while updating the date, time, and sample data
text on the bottom line.

Figure 62. Data log graphic report page

The Tabular Report page displays samples in the text field labeled
“Conc”(gas concentration) and provides direct access to data by
scrolling to an exact date and time.

Figure 63. Data log tabular report page

Revision N (7/15) 62

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Date Time S0 S1 S2

S3

Upon entry, the Date, Time, and Conc variables are set to the most recent sample. Scrolling the Time
variable up increments it by the sampling interval, and causes the next, successive sample to be
displayed at Conc. Scrolling Time down displays the previous sample time, and value. Scrolling Time
up and down will cause a date rollover at midnight. Scrolling the Date variable up increments it by one
day, while holding the Time variable fixed. This is an expedient method to access specific data, and is
useful for examining samples recorded at the time of day.

Once the date and time are set, select the Show_Graphic link to switch to the Graphic Report page.
Data is not updated while viewing the page.

Data-log Printout

Data-log reports may be sent to serial printer, terminal, or
terminal emulation program, such as Microsoft
Hyperterminal®. See Appendix A. details on how to setup
and print reports.

07/09/06 22:40 0.01 0.00 0.02 0.01
07/09/06 22:44 –0.0 0.00 0.00 –0.0
07/09/06 22:48 0.01 TEST TEST TEST
07/09/06 22:52 TEST TEST TEST TEST
07/09/06 22:56 TEST TEST TEST TEST
07/09/06 23:00 0.07 0.06 0.07 0.06
07/09/06 23:04 0.06 0.05 0.06 0.06
07/09/06 23:08 0.05 0.05 0.04 0.05
07/09/06 23:12 0.06 0.05 0.05 0.04
07/09/06 23:16 0.01 0.01 0.01 0.00
07/09/06 23:20 0.00 0.00 0.00 -0.1
07/09/06 23:24 –0.0 0.00 0.00 0.00
07/09/06 23:28 ---- ---- ---- ---­07/09/06 23:32 ---- ---- ---- ---­07/09/06 23:36 ---- ---- ---- ---­07/09/06 23:40 FFFF FFFF 0.02 0.02

Figure 64. Data-log printout (example)

Revision N (7/15) 63

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

Display

The D12 Transmitter features a backlighted, 96w x 32h graphics LCD. Note: backlighting operates in
3- or 4-wire mode only (see External Connections).

Display Setup

>Menu >Setup >Display

►Contrast=
Light= MANUAL

Table 17. Display page variables

Variables on the Display Setup page are used to control the display
contrast, and manage the backlight.

Contrast

Light

The Contrast variable is used to adjust the LCD contrast. Scroll the variable up to
increase contrast (darker text), or down to decrease it (lighter text). The default value is
68%, and is adjustable between 0 and 100%.

The Light variable is used to control when the LCD backlighting is turned on and off.

Setting
Backlight is …

MANUAL

On when any key is touched
Off when no key touched for 5 minutes

AUTO

On when any key is touched or alarm is active
Off when no key touched for 5 minutes, and no alarms active

NEVER_ON

Off permanently

ALWAYS_ON

On permanently (not recommended)

Revision N (7/15) 64

ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

System

System pages are used to access and configure the internal clock, security, reset functions,
communication protocols, and version information.

System Access

>Menu >Setup >System

►Clock Commun
Secure Version
Reset

Real-time Clock

Clock Setup

>Menu >Setup >System >Clock

►Day= Tuesday
Date=09/17/06
Format=MM/DD/YY
Time=14:00

The System Access page provides links to the clock, security,
communications, and version pages (the Reset link has been removed
on transmitters beginning with version 2.23).

Figure 65. System access page

The Clock Setup page is used to set the transmitters real-time clock,
which is referenced during sensor calibrations and data logging, and
used to trigger Auto-test.

Figure 66. Clock setup page

Day
Date

Format

Time

Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday
Used to configure the month, date, and year, in the format specified by the

Format variable (below). Built-in support for leap year.
Selects the date format:

MM/DD/YY, example: 09/19/06
DDMMMYY, example: 09Sep06

24-hour format, 00:00 to 23:59

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0.0

Security

The transmitter protects its configuration using a 4-digit, numeric password, from 0000 to 9999. When
security is active, the “S” status indicator appears on the Main Display, variables may be read, but not
modified, and functions will not execute, including the sensor verification function during startup
review.

Security Control

>Menu>Setup>System>Secure

SECURITY
►Change_Pswd
Status=OFF

Security is off by default, and may be toggled on and off by entering the
4-digit password.

Figure 67. Security control page

Activating Security

Select the Status variable on the Security Control page, which doubles as a link to the Password Entry
page. When the page appears, select Enter Pswd, scroll to the password value (0 by default), and touch
Enter. If successful, “PASS” appears briefly and you are returned to the Security Control page where
the Status variable is set to ON. If not successful, “FAIL” appears and Status remains OFF.

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=OFF

Password Entry Page

Security is OFF
…Enter Pswd to
►Enter Pswd 0

Main Display

PPM
H2S

Password Entry Page

Security is OFF
…Enter Pswd to
►Enter Pswd PASS

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=ON

Figure 68. Activating security

Password Entry Page

Security is OFF
…Enter Pswd to
►Enter Pswd FAIL

OR

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=OFF

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The automatic relock time

but may be set between 1

but may be

Deactivating Security

The procedure to deactivate security is identical to that used for activating it, and if successful, the
transmitter presents an option to automatically reactivate it after a timed interval.

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=ON

Default is NO,
scrolled to YES to setup
the auto-relock time.

defaults to 30 minutes,
and 60 minutes.

Changing the Password

The security password is changed by selecting Change_Pswd from the Security Control page. Start by
entering the old password, the enter the new one, and repeat it.

>Menu>Setup>System>Secure

SECURITY
►Change_Pswd
Status=OFF

Old Password

Old_Pswd= 0

Password Entry Page

Security is ON
…Enter Pswd to
►Enter Pswd 0

Auto-Relock Page

Security is OFF
…Would you like
Auto Relock?YES

Auto-Relock Page

Security is OFF
…Set time until
Set_Timer
30 Minutes

Figure 69. Deactivating security

New Password

Figure 70. Changing the password

Password Entry Page

Security is OFF
…Enter Pswd to
►Enter Pswd PASS

Auto-Relock Page

Security is OFF
…Would you like
Auto Relock?NO

OR

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=OFF

New_Pswd= 7543

Password Entry Page

Security is ON
…Enter Pswd to
►Enter Pswd FAIL

OR

>Menu>Setup>System>Secure

SECURITY
Change_Pswd
►Status=ON

New Password

Repeat_New=7543
Accepted

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Variables

Description

Communications

The D12 Transmitter supports ASCII, HART 5, and Modbus communications. ASCII is the default
protocol if the HART or Modbus option is not ordered.

Communication Setup

Menu>Setup>System>Commun

►Protocol=ASCII
Interface=RS232
Baud_Rate=9600
Parametrs=N,8,1

Figure 71. Communication setup page

Table 18. Communication setup variables

Communication Setup page variables are used to configure the
protocol and settings of the physical communication interface. The
protocol selection is performed at the factory, and may not be
changed. Settings for the physical communication interface may be
changed for ASCII and Modbus protocols, however, they are
restricted for the HART protocol).

Protocol

Interface

Baud_Rate

Parametrs

The Protocol variable identifies the installed protocol driver:

• None

• ASCII (default)

• Modbus (option)

• HART (option)

The Interface variable selects the physical communication interface that the
transmitter will control during transmit and receive functions:

• RS232 (available for ASCII or Modbus, not for HART)

• RS485 (available for ASCII or Modbus, not for HART)

• MODEM (available for HART only)

The transmitter must be wired in accordance with this selection (see External
Connections).

The Baud_Rate variable is used to configure the baud rate of the transmitter’s
UART, and may be set to: 300,600,1200,2400,4800,9600,14.4k, or 28.8k

The value is fixed at 1200 for HART protocol, and defaults to 9600 for Modbus
and ASCII.

The Parametrs variable is used to configure parity, the number of data bits, and
number of stop bits of the transmitter’s UART:

• N,8,1 …no parity, 8 data bits, 1 stop bits

• N,8,2 …no parity, 8 data bits, 2 stop bits

• E,8,1 …even parity, 8 data bits, 1 stop bit

• O,8,1 …odd parity, 8 data bits, 1 stop bit

The value is fixed at O,8,1 for HART protocol, and defaults to N,8,1 for Modbus
and ASCII.

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Variables

Description

Protocol specific settings are configured on separate pages that are accessible from links on the Setup
page, and are discussed below.

ASCII

ASCII is used for sending the data log to a serial printer, terminal, or terminal program, using RS232
(RS485 might be used under certain conditions). Handshaking is XON/XOFF only, and the
Communication Setup page may be used to configure the interface, baud rate, and communication
variables. See Computer RS232 for connection details. There are no additional pages for protocol
variables.

HART

HART is a master/slave protocol that supports 1 or 2 masters, and up to 15 slave devices. Devices
communicate digitally at an effective rate of 1200 baud by modulating the 4-20mA loop. Modulation is
performed by a modem that conforms to the BELL 202 standard, which uses FSK (frequency shift
keying), where 1200Hz represents a logic 1, and 2200Hz represents logic 0, and does not affect the
loop’s DC level. Connections are typically point-to-point, which enables bi-directional digital
communication and preserves the transmitter’s analog output signal. Up to 15 devices may be
connected in a multi-drop configuration for digital communication, but requires each device to fix its
output at 4mA. See HART Transmitter connection examples in External Connections, or consult the
HART Foundation (www.hartcomm.org) for details on how to connect a HART transmitter.

When the HART protocol driver is installed, a link to the HART Setup page appears on the main Setup
page.

>Menu >Setup

Sensor DataLog
Alarms Display
Auto-T System
4-20mA ►HART

Table 19. HART setup variables

>Menu >Setup >HART

HART V5 Setup
Tag=GAS_XMTR
►Identification
Operation

>Menu … >Identification

Dev= 9f/7f/02
►Poll_Addr=0
Dev_Id=1426

Figure 72. Hart setup pages

>Menu … >Operation

►Loop= NOT_FIX
Fixed_mA=0.0
Resp_Preamb=5
Find-Me

Tag

Dev

The Tag variable can be used as a unique identifier for communicating to the
transmitter. The variable is read only at the operator interface, but may be modified
using HART network management commands.

The Dev variable displays read-only device information used in long-frame address
commands, and by devices capable of utilizing the transmitter’s DDL (device
description language) file. The format of the information is, MFG_ID/DEV/REV. The
MFG_ID is 9f, and identifies Analytical Technology, Inc as the manufacturer. DEV is
7f, and identifies the device as a D12 transmitter. REV is the revision level of the
transmitter, currently set at 2 (may increment in the future).

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Poll_Addr

Dev_Id

Loop

Fixed_mA

Resp_Preamb

Find-Me

The Poll_Addr variable sets the polling address of the transmitter. The default value
is 0, which allows the transmitter to communicate digitally, while preserving the
function of the 4-20mA output. The value may be set from 1 to 15, which fixes the
output at 4mA, and disables analog signaling.

The Dev_Id variable is used to form a unique identifier in the HART long frame
address. This value is set at the factory, and appears on a label attached to the
transmitter. Changing this setting is not recommended.

The Loop variable specifies the operation of the 4-20mA output. When the HART
polling address is 0, the value is NOT_FIX and loop functions as normal. When the
address is set to 1 or higher, the value is FIXED and the output is fixed at 4mA. The
ability to alter this behavior is reserved for future use, and changing this setting is not
recommended.

The Fixed_mA variable provides direct access the associated HART network
management variable. The value is adjustable only when the Loop variable is
FIXED, and may be adjusted between 3.5 and 22 mA.

The Resp_Pream variable provides direct access to the associated HART network
management variable, which determines the number of preamble characters (FF
hex) transmitted at the beginning of each message. The default value is 5, and may
be set from 3 to 20. Changing this setting is not recommended.

The Find-Me function places the transmitter into the Find-Me mode, where a master
device can issue a command to positively identify the physical location of the
transmitter.

Selecting the Find-Me function presents the special page that remains until the master device issues a
“Find-Me” command to the transmitter, at which point the display changes to the “Device Found” page.

a) Find Me Page

b) Device Found Page

FIND ME ARMED

ESC Key to exit

DEVICE FOUND

ESC Key to exit

Figure 73. Hart a) Find-me and b) Device found pages

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

Variables

Description

Modbus

Modbus is a master/slave protocol that supports a single master, and up to 247 slave devices on a
common bus. The RS485 interface physically limits this number to 32 (1 master, 31 slaves), and
RS232 restricts communication to a master and a single slave. The Communication Setup page may be
used to configure the interface, baud rate, and communication variables. See Modbus RS485 Multi­drop and Computer RS232 for connection details.

When the Modbus protocol driver is installed, a link to the Modbus Setup page appears on the main
Setup page.

Table 20. Modbus setup variables

>Menu >Setup

Sensor DataLog
Alarms Display
Auto-T System
4-20mA ►Modbus

Figure 74. Modbus setup page

>Menu >Setup >Modbus

Modbus Setup
►Slave_Addr=1
Time_Out= 3

Slave_Addr

Time_Out

The Slave_Addr variable is the transmitter’s slave address, which may set from 1
(default) to 247.

The Time_Out variable belongs to the data-link layer of the protocol and defines
the number of 1.5 character timeouts used to frame messages. This variable is
reserved for future use and changing it is not recommended.

Transmitter Version

The Transmitter Version page displays transmitter information:

>Menu>Setup>System>Version

ATI/D12/Tox Gas

[protocol option]

HW=X.XX SW=X.XX

MM/DD/YY

Line 1: model and version name
Line 2: protocol option (if any)
Line 3: hardware and software version numbers
Line 4: software build date

Figure 75. Transmitter version page

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Function

Description

Restart

The Restart function will cause the transmitter to start up, just as it does during a power-on-reset. This
function replaces the Reset page beginning with version 2.23 of the D12 Toxic Gas Transmitter.

Resets

Note: the Reset page has been removed on software versions 2.23, and higher.

The Reset page provides functions for resetting configuration memories, and restarting the transmitter,
which may prove useful for correcting specific faults. These functions should not be used unless they
are specified in troubleshooting procedures, or directed by authorized factory personnel.

>Menu>Setup>System>Reset

Reset Functions
►Sensor DataLog
Alarms All
4-20mA Restart

Table 21. Reset functions (do not use except for troubleshooting).

Sensor

Alarms
4-20mA
DataLog
All

Restart

Resets zero and span calibration, restarts transmitter. Sensor must be completely
recalibrated. On LEL transmitters, calibration and Auto-test history are cleared.

Resets alarm set/reset points, options, delays, and inhibit_mA, restarts transmitter.
Resets 4-20mA calibration, loop must be recalibrated, restarts transmitter.
Clears the data log history, restarts transmitter.
Resets entire transmitter to factory defaults, excluding sensor, restarts transmitter.

Requires full transmitter setup.
Restarts transmitter, only.

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D12 GAS

SPARE PARTS

(03-0250)

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Part No.

Description

Table 22. Transmitter

03-0275 PCB Stack Assembly w/o Relays
03-0263 PCB Stack Assembly with Relays
03-0279 Remote PCB Stack Assembly w/o Relays
03-0280 Remote PCB Stack Assembly with Relays
03-0250 Connector Housing Assembly
03-0307 Connector Housing Assembly w/Heater
03-0246 Sensor/Generator holder
31-0162 Remote Interconnect Cable (25’ Standard)
03-0276 PCB Stack Assembly w/Rlys
80-0066 Transmitter explosion-proof housing
46-0003 Sensor gasket (non auto-test version)
46-0002 Sensor/generator gasket (auto-test version)
00-1056 Calibration adapter
00-1251 Flowcell Assembly
29-0007 Battery
55-0004 Magnetic Screwdriver

Table 23. H10 sensor modules

Part No. Description
00-1000 Bromine, 0-1/5 PPM (2 PPM Standard)
00-1001 Bromine, 0-5/200 (20 PPM Standard)
00-1002 Chlorine, 0-1/5 PPM (2 PPM Standard)
00-1003 Chlorine, 0-5/200 (20 PPM Standard)
00-1004 Chlorine dioxide, 0-1/5 PPM (2 PPM Standard)
00-1005 Chlorine dioxide, 0-5/200 (20 PPM Standard)
00-1006 Fluorine, 0-1/5 PPM (2 PPM Standard)
00-1007 Fluorine, 0-5/200 (20 PPM Standard)
00-1008 Ozone, 0-1/5 PPM (2 PPM Standard)
00-1009 Ozone, 0-5/200 PPM (20 PPM Standard)
00-1010 Ammonia, 0-50/500 PPM (200 PPM Standard)
00-1011 Ammonia, 0-500/2000 PPM (1000 PPM Standard)
00-1012 Carbon monoxide, 0-50/1000 PPM (200 PPM Standard)
00-1013 Hydrogen, 0-1/10% (4% Standard)
00-1014 Oxygen, 0-5/25% (25% Standard)
00-1015 Phosgene, 0-1/5 PPM (2 PPM Standard)
00-1016 Phosgene, 0-5/100 PPM (100 PPM Standard)
00-1017 Hydrogen chloride, 0-10/200 PPM (20 PPM Standard)
00-1018 Hydrogen cyanide, 0-10/200 PPM (20 PPM Standard)
00-1019 Hydrogen fluoride, 0-10/200 PPM (20 PPM Standard)
00-1020 Hydrogen sulfide, 0-10/200 PPM (50 PPM Standard)
00-1021 Nitric oxide, 0-50/500 PPM (200 PPM Standard)
00-1022 Nitrogen dioxide, 0-10/200 PPM (20 PPM Standard)
00-1023 Sulfur dioxide, 0-10/500 PPM (20 PPM Standard)
00-1024 Arsine, 0-500/2000 PPB (1000 PPB Standard)
00-1025 Arsine, 0-10/200 PPM (10 PPM Standard)
00-1026 Diborane, 0-500/2000 PPB (1000 PPB Standard)
00-1027 Diborane, 0-10/200 PPM (10 PPM Standard)
00-1028 Germane, 0-500/2000 PPB (1000 PPB Standard)
00-1029 Germane, 0-10/200 PPM (10 PPM Standard)
00-1030 Hydrogen selenide, 0-500/2000 PPB (1000 PPB Standard)
00-1031 Hydrogen selenide, 0-10/200 PPM (10 PPM Standard)
00-1032 Phosphine, 0-500/2000 PPB (1000 PPB Standard)

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Part No.

Description

Part No.

Description

00-1033 Phosphine, 0-10/200 PPM (10 PPM Standard)
00-1034 Phosphine, 0-200/2000 PPM (1000 PPM Standard)
00-1035 Silane, 0-10/200 PPM (10 PPM Standard)
00-1036 Iodine, 0-1/5 PPM (2 PPM Standard)
00-1037 Iodine, 0-5/200 PPM (20 PPM Standard)
00-1038 Acid gases, 0-10/200 PPM (20 PPM Standard)
00-1039 Ethylene oxide, 0-20/200 PPM (20 PPM Standard)
00-1040 Formaldehyde, 0-20/200 PPM (20 PPM Standard)
00-1041 Hydrogen, 0-500/2000 PPM (2000 PPM Standard)
00-1042 Hydrogen peroxide, 0-10/100 PPM (20 PPM Standard)
00-1043 Alcohol, 0-50/500 PPM (200 PPM Standard)
00-1044 Alcohol, 0-500/2000 PPM (2000 PPM Standard)
00-1057 Acetylene, 0-50/500 PPM (0-200 PPM Standard)
00-1169 Hydrogen peroxide, 200/2000 PPM (500 PPM Standard)
00-1181 NOx, 50/500 PPM (200 PPM Standard)
00-1285 Silane, 500/2000 PPB (1000 PPB Standard)
00-1349 Formaldehyde, 500/2000 PPM (1000 PPM Standard)
00-1358 Ozone, 200/1000 PPM (1000 PPM Standard)
00-1359 Chlorine dioxide, 200/1000 PPM (1000 PPM Standard)
00-1425 Chlorine dioxide, 1/5 PPM (low Cl2 response)
00-1450 Dimethylamine (DMA), 100/200 PPM (100 PPM Standard)
00-1455 Hydrogen bromide, 10/200 PPM (20 PPM Standard)
00-1469 Hydrogen sulfide, 200/1000 PPM (500 PPM Standard)

Table 24. C18 gas generators

00-1239 Chlorine
00-1240 Ammonia
00-1241 Carbon Monoxide
00-1243 Hydrogen Sulfide
00-1244 Sulfur Dioxide

Table 25. Duct mount sensor accessories

00-1388 H10 Duct Mount Adapter
00-1389 H10 Duct Mount Sensor Holder
46-0003 Sensor Gasket for (00-1389)
03-0290 Duct Mount Cable Assembly

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76

Appendix A.

Printing Data Log Reports

Serial Connection

The data log report may be sent to a printer or a computer over an RS232 connection, or in some cases,
an RS485 connection.

Communication Setup Page

Menu>Setup>System>Commun

►Protocol=ASCII
Interface=RS232
Baud_Rate=9600
Parametrs=N,8,1

The communication interface, baud rate, parity, number of data bits, and
number of stop bits are configured on the Communication Setup page.

Flow Control

The transmitter uses XON/XOFF flow control while sending a report. That is, once the data stream
has begun, it will continue until the XOFF character (19) is received. After sitting idle, the report
stream will begin again upon reception of the XON character (17).

An RS232 connection can support full duplex communication and is perfectly suited for XON/XOFF
flow control. However, an RS485 connection is only half duplex. It cannot receive while it is
transmitting and might miss the XOFF character, resulting in a buffer overflow at the receiving device.

A receiving device will send the XOFF character when its buffer is nearly full. Some older dot-matrix
printers will send an XOFF because they have a small receive buffers and cannot process characters
while the head is returning to start a new line. On the other hand, most computers have comparatively
large buffers and can easily accept the report stream without sending an XOFF. Therefore, an RS485
connection may work for sending reports to a computer.

The D12 features an additional method to help avoid losing data due to buffer overflow problems on
receiving devices that lack XON/XOFF capability (or have the capability but are using an RS485
connection). A programmable time delay of up to 10s may be inserted at the end of each report line.
This permits the receiver time to process more characters in its buffer and avoid an overflow. However,
this may be a method of trial and error until the proper delay setting is determined so that no characters
are missing from the report.

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Samples …

Are forced to…

Symbol

Description

S0 S1 S2 S3

Report Format

The format of the report is suitable for import into most spreadsheet programs and consists of a date
column, a time column, and 1-30 columns for sample values. Each line of the report shows the date
and time of the first sample. Samples appearing in subsequent columns (left to right) were recorded at
equal sampling intervals.

In the top line of the example below, the first sample (S0) occurred at 22:40. The next sample to the
right (S1) occurred at 22:41, followed by the next (S2) at 22:42, and so on. This pattern is repeated
throughout the report.

Date Time

07/09/06 22:40 0.01 0.00 0.02 0.01
07/09/06 22:44 –0.0 0.00 0.00 –0.0
07/09/06 22:48 0.01 TEST TEST TEST
07/09/06 22:52 TEST TEST TEST TEST
07/09/06 22:56 TEST TEST TEST TEST
07/09/06 23:00 0.07 0.06 0.07 0.06
07/09/06 23:04 0.06 0.05 0.06 0.06
07/09/06 23:08 0.05 0.05 0.04 0.05
07/09/06 23:12 0.06 0.05 0.05 0.04
07/09/06 23:16 0.01 0.01 0.01 0.00
07/09/06 23:20 0.00 0.00 0.00 -0.1
07/09/06 23:24 –0.0 0.00 0.00 0.00
07/09/06 23:28 ---- ---- ---- ---­07/09/06 23:32 ---- ---- ---- ---­07/09/06 23:36 ---- ---- ---- ---­07/09/06 23:40 FFFF FFFF 0.02 0.02

The transmitter permits selection of either a CR (carriage
return) or CR/LF (carriage return/line feed) as the EOL (end­of-line) characters. If the lines of the report appear to be
printing over each other, choose the CR/LF option. If the
lines appear to be double spaced, choose the CR option.

The number of sample columns appearing across the page is
programmable from 1 to 30. This is designed so that a report
may be directed to either a small carriage printer, or to a
wider format device. A wider report will take less time to
print because the date and time fields will be printed less
frequently.

Samples reported are assumed to be in units of PPM, PPB,
%, or %LEL, as determined by the gas concentration units
appearing on the main display of the transmitter. Sample
values outside of printing limits are forced to the following
values.

Less than –999 -999
Greater than 9999 9999

Symbols may appear in place of sample values, and are defined as follows.

---­FFFF

TEST

****

No sample recorded. The transmitter was not on to
record the sample, or has not yet recorded the sample.
The transmitter was in fault during the sample.

The transmitter was in auto-test during the sample. This
symbol appears only if the Log_Data variable in the
Menu/Setup/Auto-T/Setup menu is set to “NO”.
Data in the log is corrupted or unreliable.

Report Control

The start date and length of the report may be controlled from the operator interface. The length of the
report is limited to the number of days actually stored in the log. The report always begins at 00:00 on
the start date, and continues forward for the number of days specified. If no data has yet been logged,
the report will show four dashes (----) in place of samples.

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Example: Charting a Data Log Report

Start HyperTerminal by clicking Start, pointing to Programs, pointing to Accessories, pointing to
Communications, clicking HyperTerminal, and then double-clicking Hypertrm.exe.

When the Connection Description dialog box appears, type in Connect To D12. If you wish, choose
an icon by sliding the horizontal scroll bar over and clicking one of the selections. Click OK when
ready.

When the Connect To dialog appears, set Connect using: to Direct to Com1 (or Direct to Com2 if
you are using COM2) and click OK.

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When the COM1 Properties dialog box appears, configure the Port Settings as shown below and click
OK.

Click View, then click Font and configure the font settings as shown. This will insure that the data is
presented in the terminal window without wrapping from line to line. You may need to experiment with
these settings to obtain an acceptable presentation in the terminal window.

Click OK when finished.

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Click File, then click Save As, and click the Save button to store the settings as a HyperTerminal
session file named Connect To D12.ht (the filename should automatically appear). You may later place
this file on your desktop and simply click it to get this point automatically.

In order to chart the report data, it must be “captured” in a file and given a name. Click Transfer on
the menu bar, click Capture Text, and then click the Browse button. Navigate to a folder and type the
name of a file to store the report in (or choose an existing file to append the new report).

Click the Save button to return to the Capture Text dialog box.When the Capture Text dialog box
reappears, click the Start button.

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ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor

►

HyperTerminal is now ready to accept a report from the D12 transmitter and save it in a file. Note that
data may appear in the terminal window (shown below) if the Connect To D12 session has been run
previously, but this data will not appear in the file just opened.

Starting the Report

Prior to sending a report to the computer, the system clock should be set and the data logger turned on
to record at least one sample. In addition, the Log_Data variable (in the Menu/Setup/Auto-T/Setup
menu) should be set to NO if you prefer to see the symbol TEST and not gas concentration values
during auto-test.

Configure the communication variables as shown below. Note that 9600 is the highest baud rate
common to the D12 transmitter and the Hyperterminal program.

Menu>Setup>System>Commun

Protocol=ASCII
Interface=RS232
Baud_Rate=9600
Parametrs=N,8,1

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Navigate to the DataLog page and select Print. You will not be allowed access if there are no samples
in the log.

>Menu >Setup

Sensor ►DataLog
Alarms Display
Auto-T System
4-20mA

Select the first (starting) date. This will automatically re-compute the maximum number of days shown
of the report (variable values will most likely differ from yours).

>Menu >Setup >DataLog >Print

►First=07/13/06
Days= 2 of 2
Page_Setup
Start Printing

Edit the Days variable if you prefer to reduce the length of the report, otherwise the entire report will be
printed.

>Menu >Setup >DataLog >Print

First=07/13/06
►Days= 1 of 2
Page_Setup
Start Printing

Select Page_Setup and configure the Width, Eol, and EolDly variables as shown. The Width variable
controls the number of sample columns printed and is settable from 1 to 30. Since the Hyperterminal
display is 80 characters wide, set this to 10 columns so that data does not wrap around to the next line.
Set Eol for CR/LF, and EolDly to 0.

>Menu >Setup >DataLog >Print

►Width= 10 Sampls
Eol=CR/LF
EolDly=0 ms

Escape from Page_Setup and select Start_Printing. “Printing” will begin flashing, and you may stop at
any time by touching the Esc key.

>Menu >Setup >DataLog >Print

First=07/13/06
Days= 1 of 2
Page_Setup
►Start Printing

>Menu >Setup >DataLog

Setup
Review_Tabular
Review_Graphic
►Print

>Menu >Setup >DataLog >Print

First=07/13/06
Days= 1 of 2
Page_Setup
Printing

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The HyperTerminal terminal window should now begin to fill with lines from the report.

07/13/2006 00:00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 00:60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 01:50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
07/13/2006 02:00 0.00 0.02 0.04 0.08 0.10 0.11 0.12 0.12 0.13 0.13
07/13/2006 02:10 0.14 0.14 0.14 0.14 0.13 0.14 0.13 0.13 0.12 0.13
07/13/2006 02:20 0.13 0.13 0.12 0.13 0.12 0.12 0.12 0.11 0.12 0.11
07/13/2006 02:30 0.11 0.12 0.10 0.10 0.10 0.09 0.10 0.10 0.09 0.09

When the transmitter has stopped printing (displays Start_Printing), click Transfer, move down to
Capture Text and click Stop. This will close the report file so that it may be opened by another

program.

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Charting with Microsoft Excel

Microsoft Excel can be used to import data log reports and create useful and informative charts.

Start Excel by clicking Start, pointing to Programs, and clicking Microsoft Excel.
When Excel opens, click File and then click Open. Navigate to the data log report file you wish to

chart and click Open. Excel will recognize the report as a text file and offer some configuration
options.

When the Text Import Wizard – Step 1 of 3 appears, configure the settings as shown below and click
Next. (Note that the values in your report file will be different than those shown below.)

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When the Text Import Wizard – Step 2 of 3 appears, configure the settings as shown below and click
Next.

When the Text Import Wizard – Step 3 of 3 appears, click Finish.

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The report should appear as a spreadsheet resembling the format shown below. Of course the dates,
times, and values will be different.

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To chart the report, select one full day of data by dragging the mouse cursor over the region to be
charted. Notice that this region begins in the time of day column and extends across each of the sample
columns.

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After selecting the region, click Insert and then Chart (or click the Chart icon directly from the toolbar).

When the Chart Type dialog appears, click on Column, and click Next.

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When the Chart Source Data dialog appears, click Next.

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When the Chart Options dialog appears, click off the Show legend option, and click Next.

When the Chart Location dialog appears, click the As new sheet radio button and enter the name of a
new sheet to store the chart in. Alternately, you may click the As object in radio button to place the
chart onto the sheet you have just created.

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If you have previously clicked the As new sheet radio button, the chart will appear on the new sheet
named above. You may now move between the new sheet and the old sheet by clicking the sheet tabs
that appear just below the chart display.

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If you have previously clicked the As object in: radio button, the chart will appear on the existing
sheet.

Finally, click File, then Save to store the chart.

Once the chart has been created, you may wish to rescale it, title it, and print it. These features are
detailed in Microsoft Excel Help and are beyond the scope of this document.

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