Teledyne 1220 Instruction Manual
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Teledyne 1220 Instruction Manual

Teledyne 1220 Instruction Manual

Multi - channel combustible monitor
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Instruction Manual
Model 1220
Multi - Channel
Combustible
r
Monito
DANGER
HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING
SYSTEM.
PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST
FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.
ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING. BEFORE
CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/
P/N M68325
MANAGER.
ECO: #99-0323
08/06/1999
Teledyne Analytical Instruments
i

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  • Page 1 Instruction Manual Model 1220 Multi - Channel Combustible Monito DANGER HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING SYSTEM. PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM. HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.
  • Page 2 Any safeguards required such as locks, labels, or redun- dancy, must be provided by the user or specifically requested of Teledyne at the time the order is placed.
  • Page 3 Instrument Serial Number: _______________________ Options Included in the Instrument with the Above Serial Number: Dual-Sensor A second sensor PCB is installed to allow the Channel Module(s) to monitor two sensors simultaneously. Teledyne Analytical Instruments...
  • Page 4 IMPORTANT NOTICE The 1220 is a safety monitor. However, it is the responsibility of the user to establish whether or not the total system of instrument, environ- ment, alarm components, and any other relevant devices actually will assure safety in his particular circumstances.

  • Page 5: Table Of Contents

    3.4.2 Changing the Fuse ............3-8 3.4.3 Adding or Removing the Second Sensor PCB .... 3-9 3.4.4 Configuring the Internal Jumper Connections ..... 3-9 Combustible Sensors ........... 3-10 Operation Introduction ..............4-1 Control Unit Operation ........... 4-2 Teledyne Analytical Instruments...
  • Page 6 Calibration of Combustible Gas Detectors to the LEL of Gases other than Methane .......... 4-14 Failure and Error Codes Failure Codes ..............5-1 Error Codes ..............5-2 Appendix Specifications ..............A-1 Recommended Spare Parts List ........A-2 Drawing List ..............A-3 Teledyne Analytical Instruments...

  • Page 7: Introduction

    The alarms are user-configurable. Description The 1220 system is comprised of a System Chassis, Control Unit, Channel Modules, and Remote Sensors. Each System Chassis contain one Control Unit and up to eight Channel Modules. Each Channel Module monitors up to two remote sensors.

  • Page 8: System Chassis

    1 Introduction Model 1220 1.2.1 System Chassis (19” Rack) The System Chassis provides structural support and electrical intercon- nection for the Control Unit and Channel Modules (up to eight Channel Modules may be installed). These latter plug into the sockets of the system chassis.
  • Page 9 Multi-Channel Combustible Monitor Introduction 1 Model 1220 Combustible Monitor Front Panel Teledyne Analytical Instruments...

  • Page 10: Detector

    1 Introduction Model 1220 • Failure codes and testpoints • Two selectable analog outputs (0-10VDC or negative ground 4-20mADC) • Extensive, automatic self-test diagnostic testing during operation • Compact and versatile design: Small footprint with accessible internal PCBs 1.2.4 Detector The detector is a low temperature, catalytic oxidation, diffusion type sensor.

  • Page 11: Operational Theory

    Multi-Channel Combustible Monitor Operational Theory 2 Operational Theory Introduction The Model 1220 combustible gas analyzer is composed of four com- ponents: System Chassis Control Unit Channel Modules Combustible Sensors The System Chassis provides structural support and electrical inter- connection for a Control Unit and up to eight Channel Modules. Each Channel Module can monitor one or two sensors (dual-sensor option).
  • Page 12 The Control Unit is the power entry and distribution point. The 1220 system contains universal power supplies that operate on 100-240 VAC, 50/60Hz. The power switch on the Control Unit switches power for the entire system.

  • Page 13: Channel Module

    Multi-Channel Combustible Monitor Operational Theory 2 Channel Module The Model 1220 Combustible Gas Analyzer uses an Intel Microcon- troller with on-board RAM and ROM to control all signal processing, input/output, and display functions for the analyzer. The channel power is supplied from two separate universal power supply modules (100-240 VAC), designed to be compatible with most international power sources.
  • Page 14 2 Operational Theory Model 1220 When exposed to a mixture containing gases and oxygen, the measur- ing bead coating allows the oxygen and combustibles to combine at its surface. The energy produced by this reaction heats the measuring bead. The rise in temperature changes the bead’s resistance and is related to the concentration of the combustible gas.
  • Page 15 1.50 Cyclohexane 1.44 Heptane 1.05 1.59 Benzene 1.50 Toluene 1.48 Ethylene Oxide 0.76 Methyl Ethyl Ketone 0.96 Methyl Acrylate 0.59 * Taken from Fire Hazard Properties of Flammable Liquids, Gases and Volatile Solids, National Fire Protection Agency. Teledyne Analytical Instruments...
  • Page 16 2 Operational Theory Model 1220 A to D To CPU Converter 0-10 V dc Concentration Digital to Analog Converter ± 12 V Test (DAC) 4-20 mA dc Power Supply 2 Concentration AC/DC Analog Output Test + 5, ± 15 V Test...
  • Page 17 CAUTION: Exposing the sensor to lead, silicone, or acidic gases may damage the sensor. NOTE: For compounds not listed, consult TAI. Teledyne Analytical Instruments...
  • Page 18 2 Operational Theory Model 1220 Teledyne Analytical Instruments...

  • Page 19: Installation

    5. Making the gas connections 6. Testing the installation Unpacking the Analyzer Each TAI Model 1220 Combustible Gas Monitoring System is gener- ally shipped with the channel modules and control module installed. Since the system is intended as a safety monitor for detecting the...

  • Page 20: System Chassis

    The System Chassis is designed for installation in a NON HAZARD- OUS Environment. 3.2.2 Power The model 1220 is designed to operate from 100/240VAC @ 50/60 Hz. Ventilation must be provided to dissipate heat generated within the control unit. Natural convection is sufficient to cool 16 Channel Modules.
  • Page 21 Loop Resistance measurement. To measure the Loop Resistance directly, short the RED and BLACK Connections at the Sensor and measure the resistance between RED and BLACK at the channel module end of the cable. Figure 3-1 Sensors Connections Teledyne Analytical Instruments...
  • Page 22 3 Installation Model 1220 Figure 3-2 Maximum Loop Resistance for Sensor Connection The terminals marked "Ext. Audible Alarm" provide an external signal that is activated whenever the audible alarm is activated. By setting jumpers on the Control Unit PCB (see section 3.3), the external signal can be either (1) a contact closure, or (2) a powerline level signal.

  • Page 23: Control Unit

    Amp fuse protects the Control Unit circuitry. To change any of the fuses, twist the fuse holder knob counterclockwise and slide the holder out until the fuse is visible, install the new fuse, slide the holder back in, and turn the knob clockwise. Teledyne Analytical Instruments...

  • Page 24: Control Unit Jumper Settings

    3 Installation Model 1220 3.3.2 Control Unit Jumper Settings The Control Unit may be configured by changing the installation of the jumpers on the PCB. See the following sections for complete jumper installation information. The default jumper installation is: Three alarms (CAUTION, HIGH, and FAIL) may be configured for...
  • Page 25 The internal audible alarm may be disabled by removing JP17. WARNING: It is not recommended to remove JP17 unless there is an external audible alarm in use. With the jumper removed, the audible alarm will not warn personnel about alarm conditions. Teledyne Analytical Instruments...

  • Page 26: Channel Modules

    3 Installation Model 1220 3.4 Channel Modules Channel Modules may be removed by first unscrewing the top (retain- ing) screw and then unscrewing the bottom (jack) screw. As the jack screw is backed out, it will pull the module from its socket. When the jack screw is free, the module may be slid out by pulling on the two screws.

  • Page 27: Adding Or Removing The Second Sensor Pcb

    Installation 3 3.4.3 Adding or Removing the Second Sensor PCB The model 1220 channel module may be configured for operation with either one or two combustible sensors. Each sensor's power supply resides on a sensor PCB. The location of the two sensor PCBs is shown in Figure 3-4.

  • Page 28: Combustible Sensors

    3 Installation Model 1220 The Channel Module can provide one of three forms of output. The output appears at terminal 16 and 17 of the terminal strip, and is selected by jumper setting as in the following table: 3.5 Combustible Sensors The sensors should be mounted with their long axis vertical and the sensing surface downward.

  • Page 29: Operation

    50% and 80% LEL (Lower Explosive Limits). The Channel Module relays revert to normal state after start-up. 4. After verifying that the Control Unit, and each Channel Module are operating normally, allow the system to stabilize over a 24 hour period. Teledyne Analytical Instruments...

  • Page 30: Control Unit Operation

    4 Operation Model 1220 4.2 Control Unit Operation 4.2.1 System Power Switch and LED The power to the entire 1220 system is controlled by the System Power Switch. The green System Power LED indicates system power status (ON/ OFF). 4.2.2 Audible Alarm Switch and Bypass LED The Audible Alarm Switch overrides the audible alarm when in the Bypass position.

  • Page 31: Channel Module Front Panel Controls & Indicators

    Multi-Channel Combustible Monitor Operation 4 Channel Module Front Panel Controls and Indicators Teledyne Analytical Instruments...
  • Page 32 4 Operation Model 1220 4.3 Channel Module Front Panel Controls and Indicators STANDBY Switch - When pressed, this membrane switch places the Channel Module in the standby mode, i.e., removes power from the sensor(s) and extinguishes the LCD display. NOTE: If the relays are configured for fail-safe operation, they will remain energized.
  • Page 33 CAUTION CAUTION Yellow LED indicates Caution alarm condition. Flashes when bypassed. FAIL FAIL Blue LED indicates a Channel Module or Sensor failure. Flashes when bypassed. POWER Green LED remains on during operation, turns off in STANDBY Mode. Teledyne Analytical Instruments...
  • Page 34 4 Operation Model 1220 NOTE: When one of these modes are selected, the field light flashes indicating which mode the monitor is on. Configuration Display Panel Fields “S1” highlighted indicates that Sensor 1 options may be set. “S2” highlighted indicates that Sensor 2 options may be set.

  • Page 35: Calibration Procedures

    Use the right or left arrow key to highlight the ZERO option. c. Press ENTER. Result: Alarms are deactivated and the ZERO display option flashes. 2. (B) Introduce zero gas into the sensor. 3. (A) After the reading has stabilized: Teledyne Analytical Instruments...

  • Page 36: Span Calibrating A Single Sensor Ch. Module

    4 Operation Model 1220 a. Press the up or down arrow key until the display reads “0”. b. Press ENTER. 4. (B) Disconnect the zero gas from the sensor. 5. (A) If necessary, proceed to the previous or next procedure. Other- wise, press RUN to place the instrument in the analysis mode.

  • Page 37: Zero Calibrating A Dual Sensor Ch. Module

    (S1 = Sensor 1 or S2 = Sensor 2). c. Press ENTER. d. Perform the procedure listed in Paragraph 4.4.2 beginning with Step “1b” and then return here. 2. To calibrate the second sensor, perform this procedure again begin- ning with Step “1b”. Teledyne Analytical Instruments...

  • Page 38: Using The "1Man" Calibration Option

    4 Operation Model 1220 4.4.5 Using the “1MAN” Calibration Option The two following calibration procedure can be performed by one technician. 4.4.5.1 Zero and Span Calibrating a Single Sensor Channel Module 1. At the Front Panel of the Channel Module to be calibrated: a.

  • Page 39: Alarm Configuration Procedures

    (“FS” = Fail-safe and “NFS” = Non-Fail- safe.) f. Press ENTER. 2. If necessary, proceed to the previous or next procedure. Otherwise, press RUN to place the instrument in the analysis mode. Teledyne Analytical Instruments 4-11...

  • Page 40: Setting The Latching Or Non-Latching Mode

    4 Operation Model 1220 4.5.2.2 Setting the Latching or Non-Latching Mode 1. At the Front Panel of the Channel Module to be configured: a. Press SELECT twice to enter the “Alarm Configuration” Mode. (“H” {High} will be flashing.) b. Use the up or down arrow key to highlight the appropriate alarm to be defined (“H”...

  • Page 41: Setting The Sensitivity Gauge

    LCD display reading on the channel module. When the level has diminished to less than the alarm level, the system may be reset by depressing the RESET button. Teledyne Analytical Instruments 4-13...

  • Page 42: Fail Alarm Conditions

    4 Operation Model 1220 4.10 FAIL Alarm Conditions The possible FAIL Alarm Conditions are: - A sensor fails. - One of the power suppliers fails. - 0-10V Output fails. - The ADC times out without a proper end-of-conversion (EOC). Whenever a failure is detected, the FAIL alarm is activated: the blue LED turns on, the alarm relay is de-energized (the FAIL relay is FAIL- SAFE, and the audible alarm is activated.
  • Page 43 Using the calibration procedures in this manual, adjust the span so that with calibration gas flowing through the calibration adapter, a meter reading of 62 is obtained. The instrument will then be calibrated to indi- cate 0 to 100% LEL of Ethane. Teledyne Analytical Instruments 4-15...
  • Page 44 4 Operation Model 1220 TABLE II Calibration Factors for TAI Combustible Gas Sensor COMPOUND CALIBRATION FACTOR Methane Hydrogen Carbon Monoxide Ethane Ethylene Acetylene Propane Propylene Butane Cyclohexane Heptane Pentane Toluene Ethylene Oxide Methyl Ethyl Ketone Methyl Acrylate Hexane 4-16 Teledyne Analytical Instruments...

  • Page 45: Failure And Error Codes

    Multi-Channel Combustible Monitor Failure and Error Codes 5 Failure and Error Codes 5.1 Failure Codes Teledyne Analytical Instruments...

  • Page 46: Error Codes

    5 Failure and Error Codes Model 1220 Error Codes Teledyne Analytical Instruments...

  • Page 47: Appendix

    Failure Alarm Indicators illuminate at Alarm Setpoint. HIGH-RED; CAUTION-AMBER; FAIL-BLUE. Sensor Type: Two element catalytic bead, anodized aluminum housing, Stainless Steel (Flame Arrestors) Signal Output: Internal: LCD Display External: 0-10 VDC or 4-20 mA nega- tive ground (user- configurable) Teledyne Analytical Instruments...

  • Page 48: Recommended Spare Parts List

    Appendix Model 1220 Power Requirements: 100-240 VAC 50/60 Hz System Enclosure: Control Module fits standard 19” Relay Rack Dimensions: 7” H x 12.3” D x 19” W Maximum Loop Resistance for Sensor Connections/Cabling: 35 Maximum Loop Resistance for 4-20 mA OUTPUT: Sensor Probe Mounting: 2 MTG.

  • Page 49: Drawing List

    Drawing List C-67019 Outline Drawing, Control Unit A-13450 Outline Drawing, Sensing Detector B-68172 Interconnection Diagram, Model 1220 C-67478 Schematic Diagram, Constant current supply D-65445 Schematic Diagram, Model 1220 Front Panel Display D-65442 Schematic Diagram, Model 1220 Main PCB Teledyne Analytical Instruments...
  • Page 50 Appendix Model 1220 Teledyne Analytical Instruments...

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