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Sensidyne SENSALERT IR Instruction And Operation Manual

Infrared hydrocarbon gas detectors
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Infrared Hydrocarbon Gas Detectors
Instruction and Operation Manual
Document No. 360-2101-01 Rev A
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Sensidyne, LP • 1000 112
Circle N, Suite 100
St. Petersburg, Florida 33716 USA
800-451-9444 • +1 727-530-3602 • +1 727-539-0550 [fax]
web:
www.sensidyne.com
• e-mail:
info@sensidyne.com

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Summary of Contents for Sensidyne SENSALERT IR

  • Page 1 Infrared Hydrocarbon Gas Detectors Instruction and Operation Manual Document No. 360-2101-01 Rev A Sensidyne, LP • 1000 112 Circle N, Suite 100 St. Petersburg, Florida 33716 USA 800-451-9444 • +1 727-530-3602 • +1 727-539-0550 [fax] web: www.sensidyne.com • e-mail: info@sensidyne.com...
  • Page 2 SensAlert IR Sensor Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 3 Commitment Our quality and service are uncompromising. We back the SensAlert IR with a five-year warranty on all materials and workmanship. We offer technical support, user training and on-site service and maintenance of equipment to meet the needs of our customers.

  • Page 4: Table Of Contents

    III. GENERAL DESCRIPTION ........................7 IV. OPERATION ............................. 9 CALIBRATION ............................12 VI. MAINTENANCE ............................15 VII. DRAWING SECTION ..........................17 VIII. UNIT STATUS FLASH CODES ......................23 IX. UNIT ERROR CODES ..........................25 Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 5: Specifications

    NOTE: The SENSALERT IR SENSOR is only 100% accurate to the target gas on the label. It will not accurately read other gasses but may still respond to them. The SensAlert IR Sensor is meant to be a single gas sensor.
  • Page 6 Note: IP ratings do not imply that the equipment will detect gas during and after exposure to those conditions. If the SensAlert IR Sensor is exposed to powerful water jets, the optics must be cleaned as outlined in section VII and a calibration performed.

  • Page 7: General Description

    Lower Flammable Limit (LFL). The SensAlert IR Sensor is ideally suited for use in harsh environments and where the cost of required maintenance for conventional catalytic detectors is prohibitive. The SensAlert IR Sensor Infrared gas detector will perform reliably in the presence of silicone and other catalytic poisoning agents and can also operate in oxygen free environments or where high background gas levels are present.
  • Page 8 Using a dual channel receiver there is no need to use any special lenses or beam splitters to achieve the different measurement bands. The SensAlert IR Sensor utilizes a unique, patented feature; the AutoAC circuit. The AutoAC circuit is an automatic analog control circuit, which allows the SensAlert IR Sensor to be calibrated for any combustible hydrocarbon, provided that a calibration quality level of the gas is available.

  • Page 9: Operation

    The first step in the installation process is to establish a mounting location for the SensAlert IR Sensor. Select a location that is typical of the atmosphere to be monitored or close to the anticipated source of a dangerous gas.
  • Page 10 See the following chart for fault code status. Note: After the SensAlert IR Sensor has been installed and finished its warmup, wait at least 1 hour before issuing a zero calibration.
  • Page 11 Full scale (100% LEL) 20.1- 21 mA Over-range (> 100% LEL) Once the fault is cleared the SensAlert IR Sensor will atomatically resume normal operation. See sections IX and X for more details on unit status and errors. Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 12: Calibration

    The SensAlert IR Sensor can be calibrated for almost any hydrocarbon using a calibration gas of the hydrocarbon that is to be detected (target gas). The SensAlert IR Sensor is required to be spanned with gas only one time with the target gas. Typically, this is done at the factory, but it is possible to field span the device by either connecting the SensAlert IR Sensor to a computer and using a software package provided by Sensidyne or, by using a Sensidyne transmitter (SensAlert IR Single or Dual Transmitter).

  • Page 13: Span Calibration

    If using a SensAlert IR Single or Dual Transmitter for span calibration, consult the appropriate manual on how to issue the span calibration. The SensAlert IR Sensor can be spanned in the field if the customer wishes to change the target hydrocarbon gas. Please contact factory for additional equipment information and pricing.
  • Page 14 SensAlert IR Sensor Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 15: Maintenance

    VII. MAINTENANCE The SensAlert IR Sensor does not normally require cleaning of the optics. However, if the unit is operating in a very dirty or dusty environment the optical path might become obscured. If the obscuration is severe enough to affect the unit’s accuracy, the unit will activate an “Optics Fault” or “Zero Drift Fault”.
  • Page 16 Description 821-2102-01 ADAPTOR KIT, IR SAMPLE DRAW (Used for sample draw applications, not required for performance approval) 821-2104-01 WEATHER GUARD ASSEMBLY, SENSALERT IR SENSOR (Not required for performance approval) 821-2001-01 Remote Sensor Junction Box Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 17: Viii. Drawing Section

    SensAlert IR Sensor VIII. DRAWING SECTION Figure # Title Error! Reference source not found. Wiring Diagram, SensAlert IR Sensor Figure 2 SensAlert IR Sensor Separation Kit Figure 3 Weather Guard Assembly Figure 4 Weather Guard Exploded View Figure 5 Sample Draw Configuration...
  • Page 18 RED: +24 VDC 3/4“ NPT BLACK: -24VDC (DC Common) THREAD BLUE: 4 TO 20 mA Output Earth Ground Stud 10-32 6.5 inches 165mm 2.6 inches 66mm Figure 1 – Wiring Diagram SensAlert IR Sensor Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 19 Class I, Div I Group B, C & D Ex d IICC GB 2. TERMINALS: 6 3. HEIGHT: 4.11” COVER INSTALLED 4. GROUND SCREW ALSO LOCATED UNDER TERMINAL BLOCK Figure 2 - SensAlert IR Sensor Separation Kit Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 20 SensAlert IR Sensor Figure 3 - Weather Guard Assembly Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 21 SensAlert IR Sensor Figure 4 - Weather Guard Assembly Exploded Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 22 SensAlert IR Sensor Figure 5 - Sample Draw Configuration Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 23: Unit Status Flash Codes

    Unit goes through its Cool Temperature calibration procedure. (Factory Only) 4mA->20mA 0x0f Self-Test Unit generates zero to full scale output (4-20mA & Norm Gas Level) Reference Channel AGC Potentiometer reaches the minimum predetermined value during the 0.2ma 0x10 Fault unit AGC procedure. Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 24 24VDC < 18 or 24VDC >32V 0x13 Comp Zeroing 0x14 Comp Spanning 0x15 Fixed 4mA 0x16 Fixed 20mA 3.6mA 0x18 Flow Fault Sample Draw ONLY: Unit has detected flow is too high or too low Sensidyne Document No. 360-2101-01 (Rev A)

  • Page 25: Unit Error Codes

    When the Balance digital potentiometer reaches the minimum predetermined value during the ERR_BAL_POT_MIN 0x0C Calibration Fault unit calibration procedure. When the AGC digital potentiometer reaches the maximum predetermined value during the ERR_AGC_POT_MAX 0x0D Optics Fault unit AGC procedure. Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 26 24VDC too High Unit Fault PRESSURE_FAULT 0x1B No Pressure Sensor Input Unit Fault FAULT_EXTERNAL 0x1C LIM (Fault Version) Either input Active…External Fault Condition Unit Fault ERR_RD_PRES 0x1D SensAlert IR Sensor. No response from MPL115A2 Unit Fault Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 27 Sample Draw System detected the flow was less than 1/2 of target flow rate (cal val) Flow Fault HIGH_FLOW Flow Fault 0x35 Sample Draw System detected the flow was greater than 2X target flow rate (cal val) Sensidyne Document No. 360-2101-01 (Rev A)
  • Page 28 SensAlert IR Sensor Run (Warning) 0x84 Slave Not Found SensAlert IR Sensor Run (Warning) 0x85 EOL Warning SensAlert IR Sensor has reached its end of life Run (Warning) 0x8B Over-Range SensAlert IR Sensor gas output over predetermined range Run (Warning) 0x8C Revision...
  • Page 29 Sensidyne, LP 1000 112 Circle N, Suite 100 St. Petersburg, Florida 33716 USA 800-451-9444 • +1 727-530-3602 • +1 727-539-0550 [fax] web: www.sensidyne.com • e-mail: info@sensidyne.com...