manualshive.com logo in svg

Oldham OLC 100, User Manual, Page: 35 / 63

Share
Download
Oldham OLC 100 User Manual Download Page 35

 

6 - Maintenance  

35 

 

 

 

Possible errors

 

The table below summarizes the various possible detector errors: 

OLC100 explosimeter 

Observed fault

 

Possible cause

 

Action

 

Zero setting not 
possible 

Sensor 

Change sensor

 

 

Cable  

Check cable

 

 

Main unit detector module 

Check module

 

Sensitivity 
adjustment not 
possible 

Sensor 

Connector cable 

Inappropriate standard gas

 

Change sensor 

Check cable 

Check standard gas 
concentration

 

High concentration 
of explosive gases 

Déréglage 

Zero setting 

Calibration

 

OLCT100 Detector  

Observed fault

 

Possible cause

 

Action

 

Line current 0 mA 

Connector cable 

Power supply 

PCB 

Check cable 

Check voltage 

Change PCB 

0 mA < Line 
current < 1mA

 

Sensor 

 

PCB 

 

Line resistance too high 

Power supply

 

Change sensor 

Change PCB 

Check cable 

 

Check voltage

 

Zero setting not 
possible

 

Sensor 

 

PCB

 

Change sensor 

Change PCB

 

Sensitivity 
adjustment not 
possible

 

Sensor 

 

PCB

 

Change sensor 

Change PCB

 

High concentration 

 

Settings disturbed

 

Zero setting 

Calibration

 

030 

Summary of Contents for OLC 100

Page 1: ...P N NPO100GB rev C...

Page 2: ...ut the written consent of Industrial Scientific Oldham S A S All of the information that is provided in this document is accurate to the best of our knowledge As a result of continuous research and de...

Page 3: ...Necessary equipment 13 Regulations and conditions of use 13 Electrical power supply 14 Transfer curve 14 Location of the detector 15 Detector positioning 15 Connector cable 16 Cable connection 17 Sco...

Page 4: ...47 General Specifications 48 Catalytic head OLCT100 XP 49 Toximetric heads OLCT100 XP and OLCT100 IS 51 Semiconductor heads OLCT100 XP 53 Infrared head OLCT100 XP IR 54 Chapter 11 Specific instruction...

Page 5: ...assuming responsibility on behalf of INDUSTRIAL SCIENTIFIC OLDHAM even though they may be involved in the sale of INDUSTRIAL SCIENTIFIC OLDHAM products INDUSTRIAL SCIENTIFIC OLDHAM shall not be respo...

Page 6: ...AL SCIENTIFIC OLDHAM by INDUSTRIAL SCIENTIFIC OLDHAM personnel or by personnel authorised by INDUSTRIAL SCIENTIFIC OLDHAM Guarantee Under normal conditions of use and on return to the factory parts an...

Page 7: ...rameter is either conducted directly via a connecting cable to a dedicated central measurement unit as with the OLC100 explosimeter that operates on the principle of the Wheatstone bridge Such a measu...

Page 8: ...omprises the following elements Id Description 1 Company label 2 Cover 3 PCB protector for OLCT version 4 PCB 5 Cable gland inlet 6 Enclosure 7 Sensor block 8 Nozzle 9 Ground connection 10 LEL sensor...

Page 9: ...ble being connected to the central unit measurement unit automation 2 Sensor block connector 3 Calibration ribbon connector 4 4 mA adjustment 5 Push button access for 4 mA adjustment 6 Zeroing 7 Sensi...

Page 10: ...er of the organisation that provided the OLDHAM production quality certification INERIS 5 Warning 6 Type of gas detected and range of measurement 7 Maximum ATEX certification temperature excluding met...

Page 11: ...r The OLCT100 range of detectors is provided with an amplifier producing a 2 or 3 wire 4 20 mA analog output These are transmitter detectors and therefore the letter T OLC100 Enclosure Explosion proof...

Page 12: ...e Detection of toxic gases Electrochemical sensor Or SC Electrochemical sensor Detection of oxygen Electrochemical sensor Electrochemical sensor Detection of CO2 Infrared sensor 4 20 mA output 2 wires...

Page 13: ...f necessary Tools Fixing hardware Regulations and conditions of use The installation should meet all the regulations currently in force for installations in explosive atmospheres in particular the sta...

Page 14: ...e curve shown gives the transmitter output current as a function of the gas concentration If the user connects the transmitter to a unit other than one that is provided by ISC Oldham they should be ce...

Page 15: ...found at ceiling height Gas densities are provided on page 30 Detector positioning The detector shall be installed with the detector sensor pointing downwards For explosive gas detectors only any tilt...

Page 16: ...mation unit by a shielded instrumentation cable armored if necessary The choice of cable will be dictated by the particular requirements of the installation distance and type of detector see table bel...

Page 17: ...zone xx xx 09 15 EG SF or EG FA or EG PF U 300 compatible with M87202 The maximum permissible length will depend on the cross section of the cable conductors see table and on the minimum supply voltag...

Page 18: ...ored and unarmored cable 054 Figure 10 implementation of a cable entry type of simple compression Cable connection The connection of the cable between the detector and central unit should be made with...

Page 19: ...on 19 022 Figure 11 connections for a 2 wire 4 20 Ma detector 024 Figure 12 connections for an intrinsically safe 2 wire 4 20 Ma detector with a Zener diode 023 Figure 13 connections for a 3 wire 4 20...

Page 20: ...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 028 Figure 15 Ground connec...

Page 21: ...pecified range of measurement can damage the electrochemical sensors Inspection or calibration is then recommended In the presence of high concentrations of carbon dioxide CO2 1 vol the oxygen measuri...

Page 22: ...y Bottle of pure air Bottle of standard gas of suitable concentration for the measurement range between 30 and 70 of the measurement range Commissioning Prior checks Check the following points Wiring...

Page 23: ...nductor sensor 4 hours Infra red detector 2 hour Opening the cover This stage is necessary for the 4 mA check zeroing and calibration of the detector Unscrew the lid of the enclosure by using a tool p...

Page 24: ...Proceed as follows 034 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 3 Connect the calibrator shroud to the...

Page 25: ...standard gas bottle D by using a flexible hose B 4 Open the valve on the standard gas bottle C flow rate 30 to 60 litres hr 5 After the measurement has stabilized approx 2 minutes read the display of...

Page 26: ...lar Figure 18 H 3 Insert the measurement lead plug into connector A 4 Place the calibration shroud on the detector head D 5 Connect the calibration shroud to the pure air bottle G by using a flexible...

Page 27: ...e gas to be detected If the user would like to calibrate the detector with a gas other than that detected and programmed in the factory reference should be made to the table on page 30 by using the re...

Page 28: ...ge displayed mV 4 mA 16 mA x bottle concentration Sensor range For example for a range of 1000 ppm CO with a standard gas bottle of 300 ppm the voltage displayed will be Voltage displayed mV 4 mA 16 m...

Page 29: ...00 18 0 9 2 35 1 75 1 25 1 15 Ammoniac NH3 15 00 30 20 100 0 6 0 90 0 65 0 50 0 45 Butane C4H10 1 50 8 50 60 2 0 1 90 1 50 1 00 0 90 Ethane C2H6 3 00 15 50 135 1 0 1 50 1 10 0 80 0 75 Ethanol C2H6O 3...

Page 30: ...ay 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 injec...

Page 31: ...ts depends on the industrial application where the detector is in use Frequent inspections should be made in the months following the commissioning of the installation and should then become more wide...

Page 32: ...mediately For use in dusty explosive atmospheres the user should undertake full and regular cleaning to avoid the build up of dust The maximum permissible thickness of a dust layer must be less than 5...

Page 33: ...described in this chapter are reserved for authorized trained personnel only Inspection and maintenance shall be carried out in accordance with standards EN60079 17 or IEC 60079 17 with whatever edit...

Page 34: ...the and multimeter sockets respectively 0 2 VDC range or similar 2 Insert the measurement lead plug into connector A 3 Use a small screwdriver to press the 4 mA adjust button D The instrument then sen...

Page 35: ...Check standard gas concentration High concentration of explosive gases D r glage Zero setting Calibration OLCT100 Detector Observed fault Possible cause Action Line current 0 mA Connector cable Power...

Page 36: ...e procedure below Inhibit any alarm signals on the central unit Switch off the supply to the detector For a catalytic sensor first remove the PCB connector Loosen the locking screw on the detector hea...

Page 37: ...enance screw B on the detector head cover Disconnect the high temperature cable from terminal block A on the detector head Connect the high temperature cable to terminal block A 048 Figure 22 OLC100HT...

Page 38: ...s should be between 30 and 70 of the detector s scale of measurement 042 Figure 23 calibration kit Use Proceed as follows 1 Connect the tube Figure rep B to the cap Figure rep A and to the pressure re...

Page 39: ...ct on measurement no effect if calibration is carried out under the same conditions shroud flow rate Effect on response time none 200 6327910 Splash guard kit Protects the detector against splashes Ef...

Page 40: ...passing through a sheath Requires the use of the gas circulation head Effect on measurement no effect Effect on response time negligible 224 6793322 Mounting kit Enables a detector to be fixed to the...

Page 41: ...ptater kit Enables the detector to be attached to the same place without having to drill more holes 220 6793718 Cable gland Purpose Reference M20 compression gland kit for non armored cable Material s...

Page 42: ...10 0 ppm 0 30 0 ppm and 0 100 ppm SO2 for OLCT100 6 314 025 Electrochemical sensor 0 10 0 ppm Cl2 for OLCT100 6 314 023 Electrochemical sensor 0 2000 ppm H2 for OLCT100 6 314 026 Electrochemical sens...

Page 43: ...R23 R141b 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 4...

Page 44: ...44 OLC T 100 Technical manual Chapter 9 Declaration of EC conformity The page below reproduces the EC declaration of conformity for the OLCT100 and OLC100 family of detectors...

Page 45: ...9 Declaration of EC conformity 45...

Page 46: ...46 OLC T 100 Technical manual Chapter 10 Technical specifications...

Page 47: ...Annexe Ordering information 47 Dimensional characteristics 044 Figure 24 dimensional characteristics of the detectors M44 pitch 1 M44 pitch 1 M44 pitch 1...

Page 48: ...upply 1 mA fault 2 mA Initialization mode Current greater than 23 mA off scale Type of cable Explosimeter screened 3 live wires HT Explosimeter screened 3 live wires Electrochemical detector screened...

Page 49: ...nse time T50 6 seconds T90 15 seconds for Methane Lifetime typical 48 months Storage conditions 50 to 70 C 20 to 60 RH 1 bar 10 6 months maximum Warm up time max 2 hours to first switching on power Sp...

Page 50: ...50 OLC T 100 Technical manual Mark on sensor VQ1 4F poison resistant sensor Figure 25 mark on VQ1 sensor...

Page 51: ...ement range ppm XP Version IS Version Temperature range C RH AsH3 Arsine 1 00 20 to 40 20 90 Cl2 Chlorine 10 0 20 to 40 10 90 ClO2 Chlorine dioxide 3 00 20 to 40 10 90 CO Carbon monoxide 100 300 1000...

Page 52: ...iH4 Silane 50 0 20 to 40 20 95 SO2 Sulfur dioxide 10 0 30 0 100 20 to 50 15 90 Specific characteristics table 2 2 Type of gas Accuracy ppm Life months Response time T50 T90 s Storage conditions Warm u...

Page 53: ...cteristics Measurement principle semiconductor Temperature range 20 C to 60 C Relative humidity 20 to 95 RH non condensing relative humidity Pressure atmospheric 10 Lifetime typical 36 months Storage...

Page 54: ...head OLCT100 XP IR Measurement range 0 100 LEL explosive gases 0 5 CO2 carbon dioxide Measurement principle Infra red absorption Accuracy CO2 version 3 of full scale at mid scale 20 C LEL version 5 of...

Page 55: ...s of explosion The information given in the following sections should be respected and taken into account by the manager of the site where the equipment is installed As far as the aim of improving the...

Page 56: ...P66 and shall be installed in accordance with standard ICE EN 60079 14 whatever edition is in force and possibly in accordance with further requirements related to the local or national regulations Th...

Page 57: ...m experience in the field The analysis of the information recorded during maintenance by our technical team has enabled us to determine the following Probabilities of Failure on Demand under normal co...

Page 58: ...nge 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...

Page 59: ...L 011 Acetonitrile 0 100 LEL 012 Acetylene 0 100 LEL 013 Acrylic acid 0 100 LEL 014 Acrolein 0 100 LEL 015 Butyl acrylate 0 100 LEL 016 Ethyl avrylate 0 100 LEL 017 Acrylonitrile 0 100 LEL 018 Benzene...

Page 60: ...L 050 Propylene Oxide Epoxypropane 0 100 LEL 051 Pentane 0 100 LEL 052 Propylene 0 100 LEL 054 Styrene 0 100 LEL 055 Super SP95 0 100 LEL 056 Toluene 0 100 LEL 057 Triethylamine 0 100 LEL 058 White sp...

Page 61: ...02 R134A 0 2 000 ppm 503 R141 0 2 000 ppm 504 R142B 0 2 000 ppm 505 R11 0 1 volume 506 R23 0 1 volume 507 Dichloromethane 0 500 ppm 508 Chloromethane Methylchloride 0 500 ppm 509 R123 0 2 000 ppm 510...

Page 62: ...62 OLC T 100 Technical manual...

Page 63: ...Annexe Ordering information 63...

Reviews:

No comments