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Combustible Gas Transmitter
Home Office
Analytical Technology, Inc.
6 Iron Bridge Drive
Collegeville, PA 19426
Phone: 800-959-0299
610-917-0991
Fax:
610-917-0992
Email: sales@analyticaltechnology.com
Web: www.Analyticaltechnology.com
Fax:
610-917-0992
O & M Manual
A12-17
European Office
ATI (UK) Limited
Unit 1 & 2 Gatehead Business Park
Delph New Road, Delph
Saddleworth OL3 5DE
Phone: +44 (0)1457-873-318
Fax:
Email: sales@atiuk.com
Fax:
+ 44 (0)1457-874-468
+ 44 (0)1457-874-468
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Summary of Contents for ATI Technologies A12-17
- Page 1 O & M Manual A12-17 Combustible Gas Transmitter 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 Road, Delph Phone: 800-959-0299 Saddleworth OL3 5DE...
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Page 2: Table Of Contents
SENSOR LOCATION ................................10 INTERFERENCES ................................10 ELECTRICAL CONNECTIONS – TRANSMITTER .......................11 DUAL CONDULET SYSTEM ............................13 A12-17 TO B14 CUSTOMER WIRING DIAGRAM......................15 A12-17 TO GENERIC INSTRUMENT WIRING DIAGRAM ..................16 OPERATION ..................................17 START-UP ..................................17 START-UP DELAY ................................18 FRONT PANEL MAGNETIC CONTROLS ........................18 LIQUID CRYSTAL DISPLAY ............................19 MENU SEQUENCE ................................20... - Page 3 FIGURE 10 - B14 RECEIVER CONNECTIONS ..................15 FIGURE 11 - GENERIC INSTRUMENT CUSTOMER WIRING..............16 FIGURE 12 - MODEL A12-17 FRONT PANEL ..................18 FIGURE 13 - LIQUID CRYSTAL DISPLAY ....................19 FIGURE 14 - TRANSMITTER PROGRAM CHART ................... 20 FIGURE 15 - CALIBRATION ADAPTER ASSEMBLY ................
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Page 4: Introduction
The A12-17 transmitters are composed of two main parts, the gas sensing element and the electronic transmitter. The sensor is an explosion-proof assembly made of type 316 stainless steel with a flame arrestor bonded at the sensing end. -
Page 5: Figure 1 - Transmitter Components
A12-17 Combustible Gas Transmitter A12-17 TRANSMITTER MODULE EXPLOSION-PROOF ENCLOSURE RELAY BASE WALL MOUNT BRACKET PLUG TRANSMITTER MODULE INTO THE RELAY BASE VIA THE RELAY PLUG MOUNTED ON THE BOTTOM OF THE TRANSMITTER MODULE. ¾” NPT ¾” NPT 1 3/8” FLATS C10-17 COMBUSTIBLE SENSOR 1¼”... -
Page 6: Figure 2 - Typical System Diagram
4-20 mA signal from the transmitter is locked at 3 mA, providing a trouble signal to any receiving equipment. A typical installation for the A12-17 is shown in Figure 2 below. It is shown connected to ATI’s series B14 single channel receiver, but the transmitter may be used directly with PLC, DCS, or computer monitoring systems without the use of a special receiver. -
Page 7: Specifications
A12-17 Combustible Gas Transmitter SPECIFICATIONS Range: 0-100% LEL (Lower Explosive Limit) Display: 3 Digit LCD Response Time (T90): 10 Seconds Sensitivity: 1% LEL Zero Drift: < 2%/Month Power: 12-28 VDC, 12 VDC at 150mA nominal, 200mA max. 24 VDC at 75mA nominal, 100mA max. -
Page 8: Installation
Sensor/transmitters should be mounted with the sensor facing down as shown in Figure 3 and 4. A12-17 transmitters are also supplied with a mounting bracket that can be used to secure the unit to a wall or plate. -
Page 9: Figure 4 - Gas Transmitter Dimensions, With Auto-Test
A12-17 Combustible Gas Transmitter 1.75” DIA. 44.4 mm DIA. Figure 4 - Gas Transmitter Dimensions, with Auto-Test O & M Manual Rev-H, 7/15 - 9 -... -
Page 10: Sensor Location
A12-17 Combustible Gas Transmitter SENSOR LOCATION Combustible gas sensors are used to detect a variety of gases or vapors. The proper sensor location will depend on the type of gas is expected. For gases that are lighter than air, such as methane, sensors should be located near the ceiling. -
Page 11: Electrical Connections - Transmitter
A12-17 Combustible Gas Transmitter ELECTRICAL CONNECTIONS – TRANSMITTER External connections to the A12-17 transmitter can be made using 3 conductor cable. Three conductor cable uses one conductor (GND) as the power supply and output signal common. Figures 5 and 6 show power, output, and sensor connections for transmitters with and without Auto-test. -
Page 12: Figure 6 - Transmitter Connections With Auto-Test
A12-17 Combustible Gas Transmitter Figure 6 - Transmitter Connections with Auto-Test O & M Manual Rev-H, 7/15 - 12 -... -
Page 13: Dual Condulet System
A12-17 Combustible Gas Transmitter DUAL CONDULET SYSTEM For some indoor applications, it is more convenient to mount the sensor toward the ceiling of the room while keeping the transmitter electronics down at a convenient elevation for making calibration adjustments. ATI’s dual Condulet system is designed for this purpose, and the interconnecting wiring is shown below. -
Page 14: Figure 9 - Dual Condulet Typical Installation
A12-17 Combustible Gas Transmitter Figure 9 - Dual Condulet Typical Installation O & M Manual Rev-H, 7/15 - 14 -... -
Page 15: A12-17 To B14 Customer Wiring Diagram
A12-17 Combustible Gas Transmitter A12-17 TO B14 CUSTOMER WIRING DIAGRAM Figure 10 - B14 Receiver Connections O & M Manual Rev-H, 7/15 - 15 -... -
Page 16: A12-17 To Generic Instrument Wiring Diagram
A12-17 Combustible Gas Transmitter A12-17 TO GENERIC INSTRUMENT WIRING DIAGRAM Figure 11 - Generic Instrument Customer Wiring O & M Manual Rev-H, 7/15 - 16 -... -
Page 17: Operation
A12-17 Combustible Gas Transmitter OPERATION After mechanical and electrical installation is complete, the transmitter is ready for operation. Prior to start-up, recheck the wiring connections to be sure power is connected to the proper terminals. START-UP When power is first applied, the transmitter will go through a start-up sequence. The LCD display will indicate the following information. -
Page 18: Start-Up Delay
These controls also allow manual activation of the Auto-Test function, and simulating manual adjustment of the 4-20 mA output to 4 different values for full system verification. Figure 12 - Model A12-17 Front Panel O & M Manual Rev-H, 7/15... -
Page 19: Liquid Crystal Display
A12-17 Combustible Gas Transmitter LIQUID CRYSTAL DISPLAY The display in the A12 transmitter provides the operator with a real time concentration display and a variety of prompts for selecting transmitter operating modes. Figure 13 shows the display, including all of the special indicators contained in it. -
Page 20: Menu Sequence
4 different mA output values, and reset the transmitter to normal operation in the event of an Auto-Test failure. Figure 14 provides a block diagram of the program in the A12-17 transmitter. Figure 14 - Transmitter Program Chart O &... -
Page 21: Figure 14 Cont'd - Transmitter Program Chart
A12-17 Combustible Gas Transmitter Figure 14 cont’d - Transmitter Program Chart O & M Manual Rev-H, 7/15 - 21 -... -
Page 22: Transmitter Mode Selection
A12-17 Combustible Gas Transmitter TRANSMITTER MODE SELECTION The transmitter provides 4 main mode selections. After the display scrolls through the power-up sequence and completes the start-up delay, it enters the NORMAL mode of operation, displaying gas concentration. By holding a magnet over the MODE control, the display will indicate “InFo”. Repeating this process will change the display to “tESt”... -
Page 23: Analog Output Simulation
ANALOG OUTPUT SIMULATION The A12-17 transmitter provides the ability to simulate 4 different current output values in order to test the complete detection system. The output may be set to values of 4.0, 12.0, and 20.0, and may also be set to the “Trouble”... -
Page 24: Calibration
A12-17 Combustible Gas Transmitter CALIBRATION A12-17 transmitters should be calibrated every 1-2 months. The frequency of calibration is dependent on the operating environment and the degree to which accuracy is important. Sensors exposed to dirt, oil mist, or vapors need more frequent calibration. -
Page 25: Span Adjustment
A12-17 Combustible Gas Transmitter To zero the transmitter, allow zero air to flow to the sensor for 5 minutes. If the sensor is located in air known to be gas free, the 5 minute delay is not necessary. Set the new zero value as follows: Step 1 With the LCD indicating normal mode of operation, activate the MODE control repeatedly until the display shows “CAL”. -
Page 26: Ma Output Adjustment
“donE”. This will take you back to the NORMAL display and mode of operation. AUTO-TEST ENABLE/DISABLE SELECTION (Units with Auto-Test) The automatic daily Auto-Test function on the A12-17 transmitter can be activated (enabled) or deactivated (disabled) from the calibration menu. Normally, this function will be enabled at all times so that the sensor response is verified regularly. -
Page 27: Calibration For Other Combustible Gases
A12-17 Combustible Gas Transmitter CALIBRATION FOR OTHER COMBUSTIBLE GASES As previously mentioned, a combustible gas sensor has a slightly different response to each combustible gas or vapor. In addition, the LEL (Lower Explosive Limit) represents different percent concentrations for different gases. For instance, the LEL for methane is 5% by volume while the LEL for butane is 1.9% by volume. -
Page 28: Error Messages
A12-17 Combustible Gas Transmitter ERROR MESSAGES The A12-17 constantly evaluates the condition of the sensor and the output loop to detect errors that might compromise the performance of the instrument. The following messages will appear on the LCD display if the transmitter detects certain failures. -
Page 29: Sensor Replacement
A12-17 Combustible Gas Transmitter SENSOR REPLACEMENT Combustible gas sensors used in the A12-17 are warranted for 12 months and generally last 2 years or more in the absence of poisoning agents. When sensor replacement is required, it can be done easily and quickly. -
Page 30: Spare Parts List
A12-17 Combustible Gas Transmitter SPARE PARTS LIST Part Number Description 03-0120 A12-17 Combustible Transmitter Module 03-0121 Explosion-proof Enclosure with Base 00-0252 C10-17 Combustible Gas Sensor 00-0258 Calibration Adapter (sensor without auto-test) Remote Calibration Adapter/Rain Shield (sensor without auto-test) 00-0261 00-0298... -
Page 31: Product Warranty
PRODUCT WARRANTY Analytical Technology, Inc. (Manufacturer) warrants to the Customer that if any part(s) of the Manufacturer's products proves to be defective in materials or workmanship within the earlier of 18 months of the date of shipment or 12 months of the date of start-up, such defective parts will be repaired or replaced free of charge. - Page 32 WATER QUALITY MONITORS GAS DETECTION PRODUCTS Dissolved Oxygen Ammonia Carbon Monoxide Free Chlorine Hydrogen Combined Chlorine Nitric Oxide Total Chlorine Oxygen Residual Chlorine Dioxide Cl2 Phosgene Bromine Potassium Permanganate Chlorine Dissolved Ozone Chlorine Dioxide pH/ORP Fluorine Conductivity Iodine Hydrogen Peroxide Acid Gases Ethylene Oxide Peracetic Acid...
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