Oldham OLC100 User Manual
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Oldham OLC100 User Manual

Explosimeter, toxic gas and oxygen detector
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(P/N : NPO100GB rev C)

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Summary of Contents for Oldham OLC100

  • Page 1 (P/N : NPO100GB rev C)
  • Page 2 Copyright © 2011 by Industrial Scientific – Oldham S.A.S First edition, French version All rights reserved. No reproduction of all or part of this document, in any form, is permitted without the written consent of Industrial Scientific – Oldham S.A.S.

  • Page 3: Table Of Contents

    Operating principle ..................7 Composition of the detector ...............8 Internal elements..................9 Identifiers....................10 Chapter 2 | Ranges ............... 11 OLC100 and OLCT100 ranges ..............11 OLCT100 range (Transmitter type)............12 Chapter 3 | Installation ............13 Necessary equipment ................13 Regulations and conditions of use ............13 Electrical power supply ................14...
  • Page 4 Chapter 6 | Maintenance............33 Checking the current generator..............34 Possible errors ..................35 Replacing sensor block ................36 Calibration kit....................38 Chapter 7 | Accessories ............39 Cable gland ....................41 Chapter 8 | Spare parts............42 Chapter 9 | Declaration of EC conformity ......44 Chapter 10 | Technical specifications ........46 Dimensional characteristics ..............47 General Specifications ................48...
  • Page 5 INDUSTRIAL SCIENTIFIC OLDHAM equipment, or for any other reason without the prior consent of INDUSTRIAL SCIENTIFIC OLDHAM. Limites de responsabilité...
  • Page 6 Warning This is not a contractual document. In the best interest of its customers and with the aim of improving performance, INDUSTRIAL SCIENTIFIC OLDHAM reserves the right to alter the technical features of its equipment without prior notice. READ THESE INSTRUCTIONS CAREFULLY BEFORE THE FIRST USAGE: these instructions should be read by all persons who have or will have responsibility for the use, maintenance, or repair of the instrument.

  • Page 7: Chapter 1 | Presentation

    (as with the OLC100 explosimeter) that operates on the principle of the Wheatstone bridge. Such a measurement unit is available in the OLDHAM range.

  • Page 8: Composition Of The Detector

    Composition of the detector A detector comprises the following elements: Description Company label Cover PCB protector (for OLCT version). PCB. Cable gland inlet. Enclosure. Sensor block. Nozzle. Ground connection. LEL sensor (high temperature). Figure 1 : component parts of an OLCT100 detector. OLC(T)100 Technical manual...

  • Page 9: Internal Elements

    Sensor block connector. Calibration ribbon connector. 4 mA adjustment. Push button access for 4 mA adjustment. Zeroing. Sensitivity adjustment. OLC100 detector OLCT100 explosimeter OLCT100 detector for toxic gases Figure 2 : internal view of the detectors. 1 - Presentation...

  • Page 10: Identifiers

    This in turn groups the detector features together: Description Manufacturer's name Type of product ATEX- IECEx Marking CE symbol and the number of the organisation that provided the OLDHAM production quality certification (INERIS) Warning. Type of gas detected and range of Figure 3 : Company label. measurement...

  • Page 11: Chapter 2 | Ranges

    Chapter 2 | Ranges OLC100 and OLCT100 ranges The OLC100 range is reserved for the detection of explosive vapor by using a Wheatstone bridge sensor. The OLCT100 range of detectors is provided with an amplifier producing a 2 or 3 wire 4-20 mA analog output.

  • Page 12: Olct100 Range (Transmitter Type)

    OLCT100 range (Transmitter type) OLCT100XP OLCT100XP-IR OLCT100IS OLCT100HT Features Explosionproof Explosionproof Intrinsically Explosionproof safe (1) Infrared sensor Catalytic sensor Detection of Catalytic explosive sensor (VQ1 or high gases AP 4F) or semi- temperature conductor Detection of Electrochemical Electrochemical toxic gases sensor sensor Or SC...

  • Page 13: Chapter 3 | Installation

    Chapter 3 | Installation It is recommended that the guides relating to the installation, use, and maintenance of flammable gas and oxygen detectors (standard EN/IEC 60079- 29-2) and toxic gas detectors (standard EN 45544-4) should be clearly understood. Installation shall be in accordance with the standards in force, classification of the zone, and in conformity with standards EN/IEC 60079-14 and EN/IEC 61241-14, the editions in force, or with other national and/or local standards.

  • Page 14: Electrical Power Supply

    If the user connects the Fault transmitter to a unit other than one that is provided by ISC Oldham, they should be certain that the transfer curve is fully compatible with the input characteristics of their equipment to ensure the proper interpretation of the information provided by the transmitter.

  • Page 15: Location Of The Detector

    Location of the detector Depending on the density of the gas to be detected or the application, the detector shall be positioned at the ground level, or on the ceiling at the same height as the airflow, or near to the air extraction ducts. Heavy gases may be detected at the ground level, while light gases will be found at ceiling height.

  • Page 16: Connector Cable

    A special holder is available for mounting the detector on the ceiling (see section on accessories. In the OLCT100 HT version, only the OLC20 HT removable detector head can be used at temperatures from -20°C to + 200° C. Only the OLCT100 HT enclosure can be used in ambient temperatures from - 40°...

  • Page 17: Cable Connection

    Ω Ω (2) for resistance calculations, the assumed load is 120 for 4-20 Ma, and a 300 Zener blocking diode. Warning: all wiring should meet the installation standards and should be described in a system document for SI installations The cable must have a braided screen to reduce the influence of electrical and radio-frequency interference.
  • Page 18 Armored cable Unarmored cable Note : If the instructions so indicate, the cable may be anchored either inside the housing, or outside of it, and next to the cable gland Figure 9 : example of connection of armored and unarmored cable. Figure 10 : implementation of a cable entry type of "simple compression.
  • Page 19 Figure 11 : connections for a 2-wire 4-20 Ma detector. Figure 12 : connections for an intrinsically safe, 2-wire 4-20 Ma detector with a Zener diode. Figure 13 : connections for a 3-wire 4-20 Ma detector. 3 - Installation...
  • Page 20 Figure 14 : connections for a 3-wire OLC100 type detector Connecting the enclosure to ground Connect the enclosure ground terminal to earth according to the regulations. This ground connection may, however, be taken from the terminal on the screw fixing the PCB to the inside of the housing.

  • Page 21: Scope Of Use

    Scope of use The gas detector sensors have certain limitations; it is essential to fully ecognize these limitations (see chapter 10). Presence of specific components Vapour from silicone or sulphur-containing components can affect the catalytic gas detector sensors and thereby distort the measurements. If the sensors have been exposed to these types of compounds, an inspection or calibration will become necessary.

  • Page 22: Chapter 4 | Calibration

    Chapter 4 | Calibration The tasks described in this chapter are reserved for authorised trained personnel only, since these tasks are liable to affect detection reliability This procedure describes: 4 mA calibration for 4-20 mA detectors; zero adjustment; Sensitivity adjustment. Necessary equipment Multimeter (ranges 0-30 mA and 0-2 V), intrinsically safe if necessary.

  • Page 23: Stabilization Time

    Stabilization time After mounting, it is essential to allow the detector temperature to stabilize. In addition, after turning the power on, certain sensors require a further pre-heating time. Any adjustment before the time indicated will result in an incorrect measurement, which may in turn compromise the safety of the goods and personnel.

  • Page 24: Calibrating The Olc100

    30 by using the recommended gas and corresponding coefficient. Zeroing Proceed as follows : Figure 16 : Zeroing (OLC100). 1. Inhibit any alarm signals on the central unit. 2. Place the calibration shroud onto the detector head (Figure 16, "A").
  • Page 25 7. Close valve "C" on the bottle and remove the calibration shroud "A". 8 . Walt for the measured signal to return to zero and reset the alarm signals on the central unit. Figure 17 : Sensitivity adjustment (OLC100). 5 – Preventive maintenance...

  • Page 26: Calibrating The Olct100

    Calibrating the OLCT100 Zeroing (OLCT100) Proceed as follows: Figure 18 : Zeroing (OLCT100). Inhibit any alarm signals on the central unit. 2. Insert the blue and green plugs on the measurement lead into the + and - multimeter sockets, respectively (0-2 V range or similar) (Figure 18, "H") 3.
  • Page 27 8. If a different value is displayed, adjust the "0" control ("C") in order to correct the value until 0.4 V is exactly displayed. 9. Close the valve "F" on the bottle. Remove calibration ribbon cable "A", calibration pipe "D", and close the detector again if no sensitivity control is necessary.
  • Page 28 5. Connect the calibration shroud to the standard gas bottle "G" by using a flexible hose "E". A stainless steel pressure gauge and Teflon tube must be used for toxic gases and Freons. Note: for an oxygen detector, use a bottle of pure air or roughly 19% oxygen. 6.
  • Page 29 Table 3 : Calibration coefficients of explosive gases for catalytic detectors with a 4F sensor. Chemical Vapor Butane Formula density Coeff Coeff Coeff Acetone 2,15 13,0 2,24 Acetylene 1,22 2-Butanone 11,5 2,46 Ethylene 34,0 0,98 1,47 Natural gas 15,0 0,55 1,05 Cells with a gray background: gases recommended for calibrating the detector Table 4 : Calibration coefficients of explosive gases for catalytic detectors...
  • Page 30 Benzene) Toluene C7H8 1,20 4,00 2,95 2,15 1,90 Xylene C8H10 1,00 7,60 4,00 2,90 2,15 1,90 Cells with a gray background: gases recommended for calibrating the detector Example (first line of table) Calibration of an "acetone" detector with a standard gas comprising 1% volume butane Value to be displayed: 1 %( injected butane)

  • Page 31: Chapter 5 | Preventive Maintenance

    Frequency of maintenance Gas detectors are safety devices. OLDHAM recommends the regular testing of fixed gas detection installations. This type of test consists of injecting the standard gas into the detector at a sufficient concentration to activate the pre-set alarms. It is to be understood that this test is in no way a replacement for a detector calibration.

  • Page 32: Actions

    Actions Periodic maintenance comprises the following actions: Removal of dust from the sensor’s protective housing, using only a dry cloth. No water or solvents should be used. Severely dusty heads or sensors should be replaced immediately. For use in dusty explosive atmospheres, the user should undertake full and regular cleaning to avoid the build-up of dust.

  • Page 33: Chapter 6 | Maintenance

    EN60079-17 or IEC 60079-17, with whatever editions are in force or with other national standards. The 4 mA level is factory-set. This value cannot be changed or adjusted. This check does not concern explosimeter OLC100. First follow the instructions Opening the cover. 6 - Maintenance...

  • Page 34: Checking The Current Generator

    Checking the current generator Although this setting is made in the factory, it is possible that the transmitter and central unit may have to be matched. In this case, proceed as follows Figure 20 : checking the current generator 1. Insert the blue and green plugs on the measurement lead into the + and – multimeter sockets, respectively (0-2 VDC range or similar).

  • Page 35: Possible Errors

    Possible errors The table below summarizes the various possible detector errors: OLC100 explosimeter Observed fault Possible cause Action Zero setting not Sensor Change sensor possible Cable Check cable Main unit detector module Check module Sensitivity Sensor Change sensor adjustment not...

  • Page 36: Replacing Sensor Block

    Replacing sensor block Standard Version First follow the instructions in the section Opening the cover The sensor block encloses the actual detector sensor itself. A sensor block can only be associated with a defined detector. A guide pin ensures that the sensor block goes together correctly Figure 21 : The sensor block (the black component) fits in the cover of...
  • Page 37 High temperature version Proceed as follows for the high temperature version. Inhibit any alarm signals on the central unit. Switch off the supply to the detector. Loosen the maintenance screw (Figure 20, "B") on the detector head cover and remove it. Replace the defective detector head and replace the maintenance screw "B"...

  • Page 38: Calibration Kit

    Calibration kit Description The kit generally comes with the following contents: Description Shroud for introducing the gas (optional) to be attached onto the detector to be calibrated. Plastic tube (Rylsan®). A Teflon® tube should be used for corrosive gases. Pressure release and flow regulator. Pressure gauge showing the internal bottle pressure.

  • Page 39: Chapter 7 | Accessories

    Chapter 7 | Accessories Accessory Utilization Illustration Reference 6331141 Calibration Facilitates the injection of standard gas into the measurement sensor Effect on measurement: measurement similar to that for natural diffusion Effect on response time: none 6327910 PTFE remote Enables measurement in sampling cup bypass mode Effect on measurement: no...
  • Page 40 Accessory Utilization Illustration Reference PTFE water Protects the gas inlet from 6335975 barrier dust and splashing Effect on measurement: no effect, but cannot be used for detecting O , HCL, HF, or Effect on response time: response time increased (contact us for heavy gases of a density greater than 3 and at low concentrations <...

  • Page 41: Cable Gland

    Accessory Utilization Illustration Reference Ceiling gas Allows the sensor to detect 6331168 collector more quickly the gas. (Ceiling) Effect on measurement: no effect. Effect on response time: response time can increase up to 10%. Humidifier kit Used for the calibration of the semi-conductor transmitters Tools kit Tool kit for maintenance...

  • Page 42: Chapter 8 | Spare Parts

    Chapter 8 | Spare parts List of spares for the various detectors Reference Description 6 314 010 Explo. Sensor 0-100% LIE CFC100 VQ1 for OLC100 6 314 042 Infra-red sensor 0-100% LIE CH for OLCT100 6 314 043 Infra-red sensor 0-5% vol. CO...
  • Page 43 R143a, R404a, R507, R410a, R32, R227, R407c and R408a freons for OLCT100 6 314 039 Semiconductor sensor for ethanol, toluene, isopropanol, 2- butanone and xylene for OLCT100 6 451 626 OLC100 Board 6 451 646 OLCT100 IR Board 6 451 621 OLCT100 SC Board 6 451 594 OLCT100 explo.

  • Page 44: Chapter 9 | Declaration Of Ec Conformity

    Chapter 9 | Declaration of EC conformity The page below reproduces the EC declaration of conformity for the OLCT100 and OLC100 family of detectors OLC(T)100 Technical manual...
  • Page 45 9 – Declaration of EC conformity...

  • Page 46: Chapter 10 | Technical Specifications

    Chapter 10 | Technical specifications OLC(T)100 Technical manual...

  • Page 47: Dimensional Characteristics

    Dimensional characteristics Figure 24 : dimensional characteristics of the detectors. Annexe – Ordering information...

  • Page 48: General Specifications

    General Specifications Supply voltage at the detector OLC100: 340 mA (current supply). terminals: OLCT100 XP HT: 15.5 V to 32 V. OLCT100 XP LEL: 15.5 V to 32 V. OLCT100 XP IR: 13.5 V to 32 V. OLCT100 XP EC: 10 V to 32 V.

  • Page 49: Catalytic Head (Olct100 Xp)

    Weight : OLC100: 0.950 kg. OLCT100 XP HT: 1.8 kg. OLCT100 XP LEL: 1.0 kg. OLCT100 XP IR: 1.1 kg. OLCT100 XP EC: 1.1 kg. OLCT100 XP SC: 1.1 kg. Materials: Epoxy painted aluminum Optional 316 stainless Catalytic head (OLCT100 XP)
  • Page 50 Mark on sensor VQ1 4F poison resistant sensor Figure 25 : mark on VQ1 sensor. OLC(T)100 Technical manual...

  • Page 51: Toximetric Heads (Olct100 Xp And Olct100 Is)

    Toximetric heads (OLCT100 XP and OLCT100 Common characteristics Measurement principle: Electrochemical sensor Pressure: Atmospheric ± 10% Specific characteristics (table 1/2) Type of gas % RH Measurement Temperature range range ° C Version Version (ppm) Arsine 1,00 -20 to +40 20 - 90 Chlorine 10,0 -20 to +40...
  • Page 52 Type of gas % RH Measurement Temperature range Version Version range° C (ppm) Ammonia -20 to +40 15 - 90 1000 5000 Nitrogen -20 to +50 15 - 90 monoxide 1000 Nitrogen 10,0 -20 to+ 50 15 - 90 dioxide 30,0 Oxygen 0-30% vol...

  • Page 53: Semiconductor Heads (Olct100 Xp)

    Type of Accuracy Life Response Storage Warm-up (ppm) (months) time conditions time max +/- 0,8 30/60 0,4 % vol 6-15 Aucun (3) (15 to 22 % O +/- 0,05 30/120 +/- 1 25/120 +/- 0,7 15/45 (range 0-10) 4 – 20 ° C 4 –...

  • Page 54: Infrared Head (Olct100 Xp-Ir)

    Type of gas Accuracy Measurement range 70% FS) Freon R23 1 % vol Freon R141 b 2000 ppm 25 / 50 Freon R143 a 2000 ppm Freon R404 a 2000 ppm Freon R507 2000 ppm Freon R410 a 1000 ppm Freon R32 1000 ppm Freon R227...

  • Page 55: Chapter 11 | Specific Instructions For Use In Explosive Atmospheres And Operational Safety

    Chapter 11 | Specific instructions for use in explosive atmospheres and operational safety General comments OLC/OLCT 100 conforms to the requirements of European Directive ATEX 94/9/CE relating to explosive Dust and Gas atmospheres. On account of their metrological performance as tested by the accredited organization INERIS (in process), the OLC/OLCT 100 transmitter detectors intended for the measurement of explosive gases are classed as safety devices in the sense of the European Directive and may, therefore, contribute to limiting the risks of explosion.

  • Page 56: Metrological Performance For The Detection Of Flammable Gases

    These detectors are classed as safety devices according to ATEX 94/9/CE Directive and may, therefore, contribute to limiting the risks of explosion. For this to be so, they must be connected to Oldham type MX15, MX32, MX42A, MX48, MX43, MX52 or MX62 detection units, or otherwise connected to measurement units with 4-20 mA inputs conforming to section 1.5 of Annex II of Atex Directive...

  • Page 57: Reliability Data

    The safety function of the OLC/OLCT100 detector is the detection of flammable gases using catalytic technology and a 4-20 mA current output proportional to the gas concentration expressed as a percentage of LIE, respectively from 0 to 100% LIE. In the event of failure, the current will assume a fall-back value less than or equal to 1 mA or greater than or equal to 23 mA.
  • Page 58 The detector may be opened in a gaseous explosive zone (dusty non-explosive) only to change the sensor block or for maintenance or to connect a compatible intrinsically safe voltmeter with the following characteristics: • Certified for use in explosive atmospheres (Group IIc), no generator of current or voltage •...

  • Page 59: Annexe | Ordering Information

    Annexe | Ordering information Gas List Please find below the list of gases that the OLC/OLCT100 detector can detect. Gas number Methane 0-100 % LEL Methane 0-100% LEL (4.4% vol) Hydrogen 0-100% LEL Butane 0-100% LEL Propane 0-100% LEL Ammonia 0-100% LEL Ethyl acetate 0-100% LEL Butyl Acetate 0-100% LEL Methyl acetate methyle 0-100% LEL...
  • Page 60 Gas number Heptane 0-100 % LEL Hexane 0-100% LEL Isobutane 0-100% LEL Isobutene 0-100% LEL Isopropanol 0-100% LEL Kerosene (JP4) 0-100% LEL Methalcrylate methyl 0-100% LEL Methanol 0-100% LEL Methylamine 0-100% LEL Naphta 0-100% LEL Naphtalene 0-100% LEL Nonane 0-100% LEL Octane 0-100% LEL Ethylene Oxide (epoxyethane) 0-100% LEL Propylene Oxide (Epoxypropane) 0-100% LEL...
  • Page 61 Gas number SO2, 0-100 ppm Cl2, 0-10 ppm H2, 0-2,000 ppm HCl, 0-30 ppm HCl, 0-100 ppm HCN, 0-10 ppm HCN, 0-30 ppm NH3, 0-100 ppm NH3, 0-1,000 ppm NH3, 0-5,000 ppm ClO2, 0-3 ppm CO2, 0-5% non linearized CO2, 0-10 % volume PH3, 0-1 ppm AsH3, 0-1 ppm R12, 0-1% volume...
  • Page 62 OLC(T)100 Technical manual...
  • Page 63 Annexe – Ordering information...

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