Related Manuals for PEMTECH PT395 Series
Summary of Contents for PEMTECH PT395 Series
- Page 1 Gas Detection Technology PT395 Series Stand Alone Gas Detector Toxic, Oxygen Deficiency, & Combustible (HC) Revision 5 September 2015 Operator’s Manual Pem-Tech, Inc. Houston, Texas U.S.A www.pem-tech.com...
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Page 2: Table Of Contents
Response check / Bump Test Calibration errors and remedies Calibration Flow Chart Adjust Alarm Levels Setting Alarm Set Point Alarm Conditions Resetting Alarms MAINTENANCE Routine maintenance Sensor Inspection, sensitivity and replacement 32 Spare Parts Sub-assemblies and calibration accessories PT395 Series Detector... -
Page 3: Notice And Limited Warranty
• If needed the enclosure threads may be coated with silicone free grease. Silicone based lubricants must never be used. • Follow the wiring instruction for proper and safe operation under normal conditions. Be sure that all wiring complies with NEC and all local ordinances. PT395 Series Detector... -
Page 4: Specifications
Transient over voltage suppressor, Mechanical Specifications Reverse polarity protection Height: 7.4inches (188 mm) EMI/RFI Immunity Width: 6.2 inches (159 mm) Depth 4.9 inches (125 mm) Cable Entry Hub ¾” NPT Female Adapter available for ½” NPT / M20 PT395 Series Detector... -
Page 5: Overview
Earth Ground Lug Field Cable Entry (x2) ¾” NPT One Entry with Ex Plug Digital Display Mounting Holes (X2) Transmitter assembly Alarm LED Indicators Stainless Steel (316) Sensor Head Assembly Figure 1. PT395 Series Detector PT395 Series Detector... - Page 6 Table 1. Reference Table for Target Gas Range and default parameters Toxic Gases Rev 2: 1/5/16 Recovery Target Gas Max Range Sensor Res. Calib Gas Default Response Operating Temperature Default alarm Levels / Type Range Time (T10) Calib Gas time (T90) Set Points seconds (user...
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Page 7: Transmitter Board Assembly
Transmitter Board The transmitter board assembly consists of the signal conditioning circuit, microprocessor, LED display and 4-20 mA output circuit. The transmitter board assembly is connected to the connection board via ribbon cable and secured onto the stand-off via two thumb screws. To remove the transmitter board simply move the thumb screws counter-clockwise and slowly pull the transmitter board away. -
Page 8: Accessories
Figure 2. PT395 Series Transmitter and connection board assembly Accessories Range of accessories is available for the use of detector in various applications. Rain / Dust guard To protect the sensor head assembly against the ... - Page 9 : A tool used to initiate the internal magnet sensitive switches for alarm configuration and to initiate sensor calibration. Pipe Mount Assembly Includes hex bolts and stainless steel bracket to mount the sensor to up to a 2” pipe. PT395 Series Detector...
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Page 10: Installation
The other side must be plugged with the one supplied with the unit. An approved plug for hazardous location must always be used. 4.9" 5.50" (125mm) (139.7mm) Cable Entry " NPT Female Both Sides 7.4" (188mm) Ø 0.3" (7.6 mm) 2 Places Figure 3. Overall Dimensions PT395 Series Detector... -
Page 11: Transmitter Wiring
Note: Do not apply excessive force to tighten the screws. Place the cover back on the enclosure. Caution Cable Shield wire should be grounded at the controller or PLC side not inside the detector enclosure. PT395 Series Detector... - Page 12 100 on the controller or signal receiver. Ω Max resistance per core : R = V/I 8volts / detector consumption (A) Max Loop resistance for toxic & infrared 67.8 Ω Catalytic Bead: 29.8 Ω PT395 Series Detector...
- Page 13 Figure 4. Wiring Diagram for Power and 4-20 mA signal connection PT395 Series Detector...
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Page 14: Low And High Alarms Connections
Figure 5. Wiring diagram for Alarm Relay Connection PT395 Series Detector... -
Page 15: Start Up
If calibration is required then follow the steps in the Calibration procedure. If the unit is powered up for the first time then allow at least 15 to 20 minutes before attempting calibration or bump test. PT395 Series Detector... -
Page 16: Normal Operation
+ 4 = Analog output (mA) Detection Range Formula to convert mA to gas reading: ( mA Output - 4 ) x Detection Range = gas_reading (Note: Detection Range is the full scale range of the sensor) PT395 Series Detector... -
Page 17: Alarm Conditions
18 %, the relay will be energized if the oxygen level is at or falls below 18% Fault (Sensor Fail) PT395 is in Fault (Malfunction) condition when the sensor assembly malfunctions. In Fault condition the 4-20mA output generated would be less than 1.0 mA. The sensor displays “FLt” when sensor in Fault. PT395 Series Detector... -
Page 18: Calibration
Once the calibration is initiated the alarm relays will be inhibited and the 4-20mA analog signal will be held at approximately 2mA to avoid any false alarm. High Fault Figure 6. Magnetic switch position to activate calibration Mode switch PT395 Series Detector... - Page 19 *** Note: For Oxygen deficiency pure nitrogen is applied as calibration gas and thus value is not adjustable. Similarly for LEL detectors the Calibration Gas is fixed at 50% LEL. PT395 Series Detector...
- Page 20 If the ambient air is contaminated you may have to apply the zero air to clear all the residual gas from the sensor head assembly. The sensor must clear down to zero after the calibration gas in order to return to normal operation for successful and accurate calibration. PT395 Series Detector...
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Page 21: Calibrating Oxygen Depletion Sensor
If no gas is detected within 60 seconds the sensor aborts calibration and will display E-3 error code “Calibration Time Out” for few seconds before returning to normal operation. PT395 Series Detector... - Page 22 2mA level on the analog output line is an indication to any connected gas monitor that the sensor is in calibration mode thus avoiding any false alarm. Also refer to “Sensor calibration Flow Chart” for quick calibration review and “Calibration Error and remedies” PT395 Series Detector...
- Page 23 In case of Oxygen sensor if the oxygen level around the sensor is not 20.9% then zero air must be applied to set zero calibration of the sensor. 0.5 to 1.5 LPM Flow Regulator Figure 7. . Sensor Calibration using Flow regulator and adapter PT395 Series Detector...
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Page 24: Response Check / Bump Test
Furthermore, the sensor response time to the calibration gas must always be checked using calibration adapter. Do not verify the sensor response time with dust guard installed and applying the gas as stated in #1 above. PT395 Series Detector... -
Page 25: Calibration Errors And Remedies
The sensor detected the flow of the calibration gas but the sensitivity to the gas is not consistent. Double check the wires connecting the sensor head. And repeat the calibration procedure after few minutes. If same error reoccurs the sensor head assembly must be replaced. PT395 Series Detector... -
Page 26: Calibration Flow Chart
ADJ is being seconds displayed Remove Calib Gas when display Display flashes rapidly for about Starts flashing rapidly 10 seconds. Returns to normal (approximately 5 times per operation when sensor has second) cleared Sensor Calibrated Successfully PT395 Series Detector... -
Page 27: Adjust Alarm Levels
Refer to figure 8 below how to activate switch for Alarm Adjustments and follow the step by step instructions below. High Fault Figure 8. Seeing Alarm Levels using magnetic wand PT395 Series Detector... - Page 28 High alarm LED will start flashing displaying the current High alarm level. Repeat steps 2 to 4 to configure High alarm. High High Fault Fault Magnet Position to Magnet Position to Decrement Alarm Level Increment Alarm Level Figure 9. Using Magnet to adjust Alarm Levels PT395 Series Detector...
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Page 29: Alarm Conditions
Fault (Sensor Fail) The transmitter is in Fault (Malfunction) condition when the sensor assembly malfunctions. In Fault condition the 4-20mA output generated would be less than 1.0 mA. The Display will show “Sensor Fail” PT395 Series Detector... -
Page 30: Resetting Alarms
LCD. Move the magnet away. The relays will be de-energized, however, if the gas concentration continues to be above the alarm level the relays will be activated again. High Fault Figure 10. Magnetic switch position 4 o'clock to RESET alarms and to adjust alarm set points PT395 Series Detector... -
Page 31: Maintenance
Keep the sensor flame arrestor clean. Avoid any accumulation of dirt and oil on the filter since it will affect the diffusion of gas to the sensor. Use rain / dust shield for protection. Refer to the list of spare parts for Rain/Dust shield part number. PT395 Series Detector... - Page 32 Do not use the silicone based lubricant 7. Connect the sensor head wires to the terminals as shown in figure 4. Be sure to follow the color code as labeled on the terminal and to ensure that wires are secure and not loose. PT395 Series Detector...
- Page 33 “Start up” section in this manual. 10. Calibrate the sensor. Follow the instructions in calibration procedure in this manual. ** Note. Detector transmitter must be Calibrated any time a new sensor head assembly is installed or replaced. PT395 Series Detector...
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Page 34: Spare Parts
Hydrogen Chloride (HCL) S-61-319 S-162 Chlorine (CL S-61-320 S-359 Carbon Dioxide (CO S-842 (Range 5%) S-61-382 Range 5% or 10% S-844 (Range 10%) Combustible (HC) S-61-301 S-121 Catalytic Bead Sensor Head Combustible (HC) S-61-312 S-832 Infrared Sensor Head PT395 Series Detector... - Page 35 500 ppm Hydrogen balanced in Air 14-087 For 1000 ppm Range Sensor 50 ppm Nitric Oxide in Air 14-120 10 ppm Nitrogen Dioxide in Air 14-110 50 ppm Hydrogen Chloride in Air 14-125 5 ppm Chlorine in air 14-131 PT395 Series Detector...
- Page 36 The signature on this document authorizes the distinctive European mark to be applied to the equipment described. Authorized Signature: Rizwan Mistry Director of Engineering Date: August 29, 2014 PT395 Series Detector...