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DALEMANS DAT 420 Calibration Manual

Toxic gas and oxygen detector
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TOXIC GAS AND
OXYGEN DETECTOR
DAT 420
CALIBRATION MANUAL

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Summary of Contents for DALEMANS DAT 420

  • Page 1 TOXIC GAS AND OXYGEN DETECTOR DAT 420 CALIBRATION MANUAL...
  • Page 2 Each apparatus must be installed, operated and maintained according to the instructions, the warnings and the operational limits detailed in this manual. Use only DALEMANS original parts when you assume the maintenance of this product as specified in this manual. The use of non-Dalemans spare parts may seriously impair the performances of the apparatus.
  • Page 3 Document : DAT420_MAN02_EN.DOCX Version : V1R1 Date : 11/07/2011 DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 4: Table Of Contents

    Figure 8 : Calibration for oxygen ....................10 Table 1 : Technical specifications ....................2 Table 2 : Calibration parameters ....................11 Table 3 : Troubleshooting ......................12 Table 4 : Accessories and spare parts ..................12 DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 5: Warnings

    The length of the wires of the sensing head may not be modified. Possible defective parts must be replaced by original parts delivered by Dalemans only. Do not open the junction box or the sensing head while explosion hazard might be present. Only clean or wipe the detector surface with a DAMP cloth so as to avoid the risk of electrostatic sparks.

  • Page 6: Specifications

    Certificate FTZU 09 ATEX 0074 EN 60079-0:2006, EN 60079-1:2007 Standards EN 61241-0:2006, EN 61241-1:2004 * Non-exhaustive list. Other target gases are available upon request. Please contact Dalemans for further information. Table 1 : Technical specifications DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 7: Introduction

    • A junction box containing the connection terminals; • The FPH01 sensing head, which contains an electrochemical sensor and the 4..20 mA transmitter. For information concerning the installation and use of the DAT 420, refer to the instruction manual supplied with the detectors, or contact Dalemans.

  • Page 8: Equipment Required

    EQUIPMENT REQUIRED Check that the following equipment is available in order to ensure that maintenance or calibration operations on the detector may be completed successfully. For more information, do not hesitate to contact Dalemans. • A cylinder of pure nitrogen;...

  • Page 9: Simulation Of The 4

    4..20 mA current loop of the control unit or the programmable controller (PLC) with which it is associated. If not, it is possible to use the OctoPRO calibration unit to simulate the 4..20 mA current loop. Contact Dalemans for further information. The 4..20 mA current loop may also be simulated as follows: 1.

  • Page 10: Calibration Of Detector

    To avoid contamination of the calibration gas by the ambient atmosphere or air draughts, always use the calibration mask supplied by Dalemans (Figure 2 - Page 4) to inject nitrogen or calibration gas. To apply nitrogen or calibration gas on to the detector: 1.

  • Page 11: Figure 6 : Installing The Calibration Mask And The Voltmeter

    "40…200 mV" measurement signal as shown below. LOCKING SCREW CALIBRATION MASK OUT00000089 "40..200 mV" CYLINDER + CONNECTOR REGULATOR VOLTMETER mV ═ FLEXIBLE HOSE POTENTIOMETERS Figure 6 : Installing the calibration mask and the voltmeter DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 12: Calibration For Toxic Gases

    CALIBRATION FOR TOXIC GASES : for DAT 420 detectors fitted with a 0-20 ppm or 0-50 ppm nitrogen dioxide sensor, use a calibration gas composed of NO at 20 ppm in air! During adjustment, avoid touching the transmitter circuit or its components with your fingers.
  • Page 13 40 mV and that the reading shown on the control unit/PLC drops to zero. 11. Check that the sensor and transmitter are correctly positioned on their supports. Screw on the body of the sensing head and tighten the locking screw (Figure 5 – Page 6). DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 14: Calibration For Oxygen

    (20.9 %). 10. Check that the sensor and transmitter are correctly positioned on their supports. Screw on the body of the sensor housing and tighten the locking screw (Figure 5 - Page 6). DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 15: Calibration Conditions

    Hydrocyanic acid 0.250 Hydrofluoric acid 0.500 Hydrogen 0.270 Hydrogen 0.270 Hydrogen sulphide 0.420 Nitrogen dioxide 0.300 Nitrogen monoxide 0.300 Ozone Generator Phosgene COCl 0.500 Phosphine Calibration with A Silane 0.300 Table 2 : Calibration parameters DAT 420 DAT420_MAN02_EN.docx • V1R1...

  • Page 16: Troubleshooting

    Sintered metal filter PRE00000033 Stopper plug - Ex d brass M20 x 1.5 mm BOR00000087 Terminal block - Ex e 2P + DIN rail BASTRX00017 Transmitter - 4..20 mA TOX420 Table 4 : Accessories and spare parts DAT 420 DAT420_MAN02_EN.docx • V1R1...
  • Page 17 DALEMANS s.a. Rue Jules Mélotte 27 • B-4350 Remicourt Tel. : +32 (0)19 54 52 36 • Fax : +32 (0)19 54 55 34 info@dalemans.com www.dalemans.com...

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