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Oldham Surveyor 4B Installation, Operating And Maintenance Manual

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Summary of Contents for Oldham Surveyor 4B

  • Page 3 OLDHAM SA GAS AND FLAME DETECTION STACK GAS AND DUST MONITORING We thank you for choosing an OLDHAM SA instrument. We have taken every step to ensure that this equipment continues to give you complete satisfaction. Please read the instruction manual carefully before using the instrument.
  • Page 4 OLDHAM SA, even if involved in the sale of the products of OLDHAM SA. * OLDHAM SA shall not be liable for any direct or indirect damage, or any direct or indirect legally awarded damages resulting from the sale and use of any of its products, UNLESS THOSE PRODUCTS WERE SPECIFIED AND CHOSEN BY OLDHAM SA FOR THE USE MADE OF THEM.
  • Page 5 The values indicated must not be exceeded in any circumstances. This is not a contractually binding document. In the interest of its customers, OLDHAM reserves the right to make any changes, without notice, to the technical characteristics of its equipment in order to improve performance levels.

  • Page 6: Table Of Contents

    Contents I. DESCRIPTION II. MOUNTING OF THE SURVEYOR 4B III. CONNECTIONS 3.1. Alternative power supply 3.2. DC power supply 3.3. Explosimetric detectors 3.4. External components 3.5. Examples of installation 3.5. Examples of installation IV. OPERATING INSTRUCTIONS 4.1. Switching on 4.2. Switching off 4.3.

  • Page 7: Description

    I. DESCRIPTION Surveyor 4B is equipped with a small "NORMAL" box (58 x 105 x 90 mm). It can be snap-fastened onto a standard symmetrical DIN rail and is easily integrated in an electric equipment cabinet. The components used in operation are located on the front of the appliance:...

  • Page 8: Connections

    3.2. DC power supply 12-volt power supply The 12-volt power supply can be connected to the points marked 0 and 12 V on the Surveyor 4B terminal block (see Fig. 2, item 2). The cable must have a minimum cross section of 1.5 mm².

  • Page 9: Explosimetric Detectors

    Surveyor 4B and the detector are connected together by a shielded cable with three active conductors. The shielded cable is to be connected to the earth at one end only. • Terminals C1, C2 and C3 of Surveyor 4B and the detector are to be connected in opposite mode (see Fig. 3). Detector terminal FIGURE 3 •...

  • Page 10: External Components

    Caution: If you add a detector to an existing installation, the link between terminals 1 and 4 must be broken on each detector. 3.4. External components Surveyor 4B is equipped with the following two relays. • Relay 1 (REL 1), which is in "positive safety" mode, corresponds to the first gas alarm threshold and to the "FAULT"...

  • Page 11: Examples Of Installation

    3.5. Examples of installation Example of installation set up of a SV4B with two detectors SV 4B C1 C2 C3 Telephone dialer Life Fuse or circuit breaker To a phone network line NEUTRAL Fuse Gas valve closed * Connection box Detector A Detector B Breaking capacity of rating relays switch contact : 1 20VA ou 30W...
  • Page 12 Example of installation set up of a SV4B with a single detector. SV 4B C1 C2 C3 Telephone dialer LIFE Fuse or circuit breaker To a phone netwok line NEUTRAL Fuse Gas valve closed * 1 2 3 Detector Breaking capacity of rating relays switch contact : 120VA ou 30W Important: The relay's contacts are shown on the SV4B label, unit switch off.

  • Page 13: Operating Instructions

    IV. OPERATING INSTRUCTIONS 4.1. Switching on It is assumed that all the necessary connections have been made and that the whole installation complies with the standards currently in force. As soon as the S4B is supplied with power, it is ready to use and the GREEN light-emitting diode lights up (item 1, Fig.

  • Page 14: Fault Alarms

    4.3.2. FAULT alarms The S4B is equipped with a fault alarm (visual alarm (item 2, Fig. 6), audio alarm and relay 1) which is activated in the following cases: • One or more wires of the telemetry line interrupted, • One or more wires of the telemetry line short-circuited or with excessive power consumption.
  • Page 15 If you stop at this point, alarm 2 will be set to twice the level of alarm 1. If you continue until alarm 2 is triggered: alarm 1 will be set to half the level of alarm 2. If you wish to lock the alarm relays (inhibiting the relays) during these alarm threshold adjustments: set the maintenance switch to the high position (item 2, Fig.

  • Page 16: Adjusting The Zero

    4.4.2. Adjusting the ZERO Necessary when a cell is replaced. At least twice a year. Connect a voltmeter to the two terminal posts provided for that purpose (MF and MES), as shown below. Item 1 Item 2 FIGURE 8 Be sure to be in pure atmosphere (without gas) (If not, inject air) Adjust the ZERO (0 mV) with the potentiometer, item 1.
  • Page 17 Inject reference gas with content > threshold Alarm 1 triggered? Cell sensitivity is satisfactory Cell sensitivity is inadequate Can AL 1 be triggered by adjusting the alarm potentiometer (item 2, Fig. 8)? Cell sensitivity is inadequate: Cell sensitivity is now satisfactory. replace the cell and repeat calibration (O/S).

  • Page 18: Replacing The Fuse

    4.5. Replacing the fuse It is mandatory that spare parts must be guaranteed original OLDHAM parts as, otherwise, the reliability of the equipment could be adversely affected. The fuse (Fig. 9, item 1) must be replaced by qualified personnel only.

  • Page 19: Technical Specifications

    V. TECHNICAL SPECIFICATIONS 5.1. Technical characteristics Manufacturer: OLDHAM Type: SURVEYOR 4B Function: Control station for explosive gas detectors Capacity: 1 channel: 1 or 2 detectors Measurement: Measurement: Continuous Display unit: None Visual alarms: Failure: yellow Gas, 1st threshold: red Gas, 2nd threshold: red...

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