Oldham SV 4B, User Manual

Page 1: ...Surveyor 4B Part Number NPS4BGB Version C The Fixed Gas Detection People User Manual...

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Page 3: ...HEIR SPECIFIC USE C C L L A A U U S S E E S S C C O O N N C C E E R R N N I I N N G G P P R R O O P P E E R R T T Y Y Drawings plans specifications and information included in this document contain co...

Page 4: ...ly as concerns electricity and fitting connections and connection to the power network Any modification of the equipment or the use of parts not specified as original manufacturer s parts could lead t...

Page 5: ...tallation 11 IV OPERATING INSTRUCTIONS 12 4 1 Switching on 13 4 2 Switching off 13 4 3 Alarms 13 4 3 1 GAS alarm 13 4 3 2 FAULT alarms 14 4 4 Adjustments 14 4 4 1 Adjusting the gas alarm thresholds 15...

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Page 7: ...ests on the top item 1 indicator lights on the FRONT face item 2 connections at the bottom item 3 II MOUNTING OF THE SURVEYOR 4B The surveyor 4B appliance fitted on its symmetrical DIN rail can be ins...

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Page 9: ...r 12 VCC 2 3 1 Alternative power supply 230 volt AC power supply The Surveyor 4B must be protected on the upstream side by a two pole earth leakage circuit breaker 1A The response curve must be of typ...

Page 10: ...to the first gas alarm threshold and to the FAULT alarm This relay is equipped with SPDT contacts available on the SV 4B terminal block item 3 Fig 5 Relay 2 REL 2 which is negative safety mode corres...

Page 11: ...di is sp pl la ay y l li ig gn nt t Gas valve closed Breaking capacity of rating relays switch contact 120VA ou 30W Important The relay s contacts are shown on the SV 4B label unit switch off The AL1...

Page 12: ...a al lv ve e s st ta at tu us s d di is sp pl la ay y l li ig gn nt t Gas valve closed Breaking capacity of rating relays switch contact 120VA ou 30W Important The relay s contacts are shown on the SV...

Page 13: ...sitive safety position 4 2 Switching off The SV 4B is switched off by cutting off the power supply on an electrical equipment cabinet 4 3 Alarms 4 3 1 GAS alarm The SV 4B has two adjustable GAS alarm...

Page 14: ...for each sensor for the purpose of verifying sensor and alarm operation and is not intended to be a measure of the accuracy of the instrument OLDHAM further recommends that a full instrument calibrat...

Page 15: ...inimum of 25 LEL should be injected Adjust the alarm potentiometer item 1 Fig 7 to trigger the first threshold AL1 the red LED AL1 flashes for 7 seconds and then remains on in steady mode trip the cor...

Page 16: ...ou read 1 000 mV for instance If you set the alarm potentiometer to read 1 500 mV the alarm is triggered at 1 5 methane Signal mV mV mVx 1500 1000 1 1000 Or Threshold 1 1500 1000 15 x mV mV 4 4 2 Ackn...

Page 17: ...ure8 4 4 4 Checking the sensitivity Necessary when a cell is replaced At least twice a year Prepare the calibration kit and secure the gas input pipe to the detector Adjust the flow rate of the refere...

Page 18: ...is satisfactory Cell sensitivity is inadequate Can AL 1 be triggered by adjusting the alarm potentiometer item 2 Fig 8 Cell sensitivity is now satisfactory Cell sensitivity is inadequate replace the...

Page 19: ...ise the reliability of the equipment could be adversely affected The fuse Fig 9 item 1 must be replaced by qualified personnel only The fuse is and must be in compliance with CEI 127 with time delay l...

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Page 21: ...ms Mounting On symmetrical DIN rail Miscellaneous Technology Mains visual indicator Housing Warranty SMC surface mounted component Green LED NORYL 1 year Dimensions 58 x 105 x 90 mm Weight 0 360 kg Ca...

Page 22: ...22 VII EC DECLARATION OF CONFORMITY...

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Page 24: ...The Fixed Gas Detection People Ex Ox Tox Gasdetectie Westerdreef 5V 2152 CS Nieuw Vennep Telefoon 0252 620885 E mail info exoxtox n Website www exoxtox nl...