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  D12 Toxic / Combustible Gas Detector
 
Operational and Maintenance Manual(s)
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Every D12 Toxic Gas Transmitter will accept up to 46 different sensors, greatly reducing the need for multiple transmitter models. The self-aligning sensor holder simply plugs in, with automatic sensor recognition and verification when contact is made.

For many toxic and combustible gases, ATI offers a unique sensor response testing system unmatched by any competitive transmitter. Even outdoors in high wind conditions, the Auto-Test system provides reliable response checks to insure system integrity.  Sensor response is verified with an actual gas sample, generated on demand.  Generators store run time information accessible to operators, and are automatically tested for compatibility with the installed sensor.

D12 transmitters provide useful features that simplify installation, operation, and maintenance. From clear menu-driven setup pages to large numerical display of gas values, you simply can’t find a more versatile transmitter.  Gas concentrations are displayed in large, easy to read numbers. The display also provides alarm indication and complete menus for setting up operating parameters.  Backlighting is available when operating in 3-wire mode.

Operating functions such as calibration, alarm setup, alarm reset, data view, and setup options are all available using a magnetic tool. It is not necessary to open the enclosure when making adjustments.

Transmitters are designed for operation in hazardous areas. The cast aluminum housing for the D12 transmitter is rated for Class 1, Division 1, Group B, C, D locations and is UL, FM, and CSA certified.

The transmitter is available with either HART™ or MODBUS™ protocol. The HART™ protocol supports the HART™ Universal and Common Practice Commands at 1200 baud using the Bell 202 FSK modem standard. The MODBUS™ protocol supports 9600 baud access to concentration and status information, and supports alarm setup and many other functions on either RS485 or RS232 (software selectable).

  D12 Toxic / Combustible Gas Detector
 
This product has multiple models. Please Choose your product from one of the links below:
D12 Toxic Gas Transmitter
D12-17 Combustible Gas Transmitter
  Digital Toxic Gas Transmitter (Cut / Paste)
This product has multiple models. See additional links below photo:

Click one of the links below
to download the typical specs
in Microsoft® Word Format:

   D12 Digital Gas Transmitter
   D12-17 Combustible Gas Transmitter

Toxic Gas Transmitters for the detection of                         (Specify Gas) and shall be provided to monitor and display ambient gas concentration in                   (Specify location). Each gas transmitter shall consist of an explosion-proof electronic transmitter and close coupled sensor holder. Sensors shall be interchangable and designed to easily fit into a sensor holder. An optional gas generator for the purpose of sensor and system response verification shall be available (for most gases). Gas transmitters shall be ATI Series D12 , 2-wire type with integral LCD display or or 3-wire type for combustible gas and display back light feature.

Gas transmitters shall measure gas concentrations in the installation area using smart electrochemical gas diffusion sensors, physically housed in a special socketed sensor holder. Sensor gas type, range and calibration data shall stored in the sensors’ memory and be automatically read into the transmitter. Sensors shall be capable of remote calibration using a bench transmitter at a convenient location with the new calibration data stored in the sensor module memory.

Gas transmitters shall be capable of logging concentration data at user defined intervals of from 1 minute up to 60 minutes and shall be capable of storing over 450 days worth of data at 60 minute intervals. Logged data shall be displayed either in graphical or table form on the integral transmitter display. The user shall have the option of also recording the concentration data measured during a sensor Auto-Test event for a permanent sensor response record.

The Gas Transmitter shall be housed in an explosion proof enclosure with window and consist of an electronic board stack with LCD graphic display with magnetic function switches for non-intrusive access to all transmitter programming and display functions. The electronic board stack shall be designed to plug into a power pupply board at the base of the transmitter enclosure and be to be easily removable for service or field wiring. The transmitter shall display gas concentrations on an LCD graphics display along with alarm indication and menus for setup and operating parameters.

Gas transmitters shall operate from power supplies of 12-30 VDC, and shall be capable of driving external loads up to 675 ohms with a standard 24 VDC supply. Transmitter enclosure shall be rated explosion-proof for Class 1, Group B, C, & D.

OPTIONAL:

Each gas transmitter shall be supplied with an Auto-Test feature consisting of an electrochemical gas generator which plugs into a location within the sensor holder and automatically generate a small concentration of gas every 24 hours to verify sensor operation. During the verification test, the analog and optional digital output from the transmitter shall be held and optional relay alarms shall be inhibited to avoid activation of alarms.

Each gas transmitter shall be provided with three SPDT 5-Amp alarm relays that are assignable to any alarm setpoint or fault condition and fully programmable for setpoint, hysteresis and time delay.

Each gas transmitter shall be provided with Hart™ communication output supporting both 4-20 mA and constant current mode of operation.

Each gas transmitter shall be provided with Modbus™ protocol and software selectable on either RS485 or RS232.



 
 
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