Consilium ST450EC User Manual & Technical Information
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Consilium ST450EC User Manual & Technical Information

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T E C H N I C A L I N F O R M A T I O N
ST450EC

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Summary of Contents for Consilium ST450EC

  • Page 1 U S E R M A N U A L & T E C H N I C A L I N F O R M A T I O N ST450EC...
  • Page 2 User manual & Technical information ST450EC version 1.11 – February 2019 All rights reserved ST450EC v1.11...
  • Page 3 The ST450 is designed for the detection (temporarily) of unexpected (toxic) gas concentrations or continues Oxygen (O ) measurement in ambient air. The ST450EC is equipped with an electrical chemical sensor and is not suitable for use in environments where continuous concentrations of gas are present (except O version, which performs continuous measurement).

  • Page 4: Table Of Contents

    USAGE IN EXPLOSION DANGEROUS AREAS ................ 30 LIABILITY IN CASE OF DAMAGES ..................30 TECHNICAL SPECIFICATIONS ....................31 PARTS AND ACCESSORIES ....................33 APPENDICES ........................34 Connection data ........................34 Relationship gas concentration vs. output signal..............34 Dimensions and mounting ....................35 Certificates ..........................36 ST450EC v1.11...

  • Page 5: General

    The sensing head uses the MODBUS as its communication protocol. The ST450EC sensing head is supplied with an Ex d/Ex t enclosure and includes an Ex d/Ex t certified cable gland. The Ex d/Ex t sensor of the gas detector is replaceable and is available for numerous toxic gasses and Oxygen.

  • Page 6: Measuring Principle

    1.1 Measuring principle The ST450EC sensing head is available in several versions for the detection of numerous gases with different gas concentrations. The sensing head features an electrochemical gas sensor using 2 or 3 electrodes (depending on the gas type).

  • Page 7: Installation

    2. INSTALLATION 2.1 Installation and mounting During the installation of the ST450EC sensing head, one should comply with the regulations and practices of the country concerned. The following general rules should be taken into account: 1. The sensing head should be installed in an area that is free from shocks or vibrations.
  • Page 8 ST450EC should be installed with an appropriate amount of distance from radio transmission equipment or similar devices. During installation the ST450EC should be isolated from local ground. The unit should only be connected to ground through the screening of the connection cable (see chapter 2.2 - Cable requirements and cable installation).

  • Page 9: Cable Requirements And Cable Installation

    2.2 Cable requirements and cable installation The signal cable for the ST450EC should be a 2-core cable (flexible) with a tinned copper braid (at least 80% optical coverage) with a core diameter of 0.75 – 2.5mm The cable should feature a suitable isolation that meets industrial standards and could withstand severe weather and industrial conditions.

  • Page 10: Maximum Cable Length

    The maximum cable length depends on the input impedance of the system that is connected with the ST450EC. The sum of the cable resistance and the input impedance results in the total load resistance and should not exceed 300 Ω.

  • Page 11: Electrical Connection

    2.5 Electrical connection For the connection of the ST450EC, the cable must be inserted in the proper manner. (See chapter 2.2 - Cable requirements and cable installation). The signal must be connected to the power supply and the signal output of the sensing head. These connections are available on connector CON1 (see wiring diagram).
  • Page 12 CONTROL 0 Vdc DETECTOR UNIT Rx (-) Modbus RTU RS485 Half Duplex Tx (+) ST450EC used as MODBUS slave device and 2 wire 4-20 mA transmitter: 0-25mA Signal PSU / +24 Vdc analog input CONTROL 0 Vdc DETECTOR UNIT...

  • Page 13: Rfi (Emi)/Emc Protection

    Use the ground connection of the gas detection system as start point grounded to earth.  Mount the ST450EC on a non-conductive structure or base.  Use an isolator when mounting on a conductive surface (like a steel I-profile, aluminium panel or swallow plate) to avoid connection to local electrical ground.

  • Page 14: Operation

    3. OPERATION After connecting the ST450EC the gas detector is ready for use. Depending on the supplied version, the sensing head is suitable for the detection of toxic gasses or Oxygen. Newly supplied sensing heads are always calibrated. The calibration (target) gas and the measurement range of the sensing head are indicated on the type label.

  • Page 15: Functions

    3.1 Functions Output signal Each ST450EC sensing head is supplied with a transmitter PCB with a 4-20mA interface. This transmitter PCB converts the sensor signal to an analogue 4-20mA signal. The sensing head has a number of predefined output levels.

  • Page 16: Control And Lc-Display

    ‘Select / enter’ button ‘Up’ button Type / model 3.2.1 Control buttons The ST450EC features capacitive control buttons which can be operated through the glass cover, without the need to remove the lid.  Use the buttons are to navigate through various menus.

  • Page 17: User Menu - Login

    3.3 User menu – Login The ST450EC has an integrated user menu which displays various settings of the gas detector and enables the user to perform an automatic calibration ZERO and SPAN calibration. To enter the menu, first login as follows;...

  • Page 18: Settings Menu

    3.3.1 Settings menu The settings menu contains a view of all user settings of the ST450EC gas detector. To activate the settings menu:  Highlight SETTINGS in the main screen of the user menu and press  The display shows the following information (max.

  • Page 19: Serial Number

    The third line displays the range of the gas detector. ▲ SN. 18-000000 The ranges corresponds with 20 mA of the analog output. Type: O2 ▼▼ RANGE: 25.0 The range is factory-set and cannot be changed. ▼ UNITS: Vol.% ST450EC v1.11...

  • Page 20: Units

    A LOW alarm can be recognized by a red LED on the front panel and the message that is shown on the LCD of the gas detector. However, a LOW alarm does not trigger an external control unit unless the control unit itself has a programmed set point based on the mA output. ST450EC v1.11...

  • Page 21: High Alarm

    SPAN to the setting menu. calibration. The set point can be changed in the menu SPAN GAS or when starting a SPAN calibration. Press to enter the menu SPAN GAS. ST450EC v1.11...

  • Page 22: Zero Suppression

    TOXIC sensors: “ZLOCK 0.5” means that the value between -0.5 and + 0.5 will be shown as “0”. OXYGEN sensors: “ZLOCK 0.5” means that the value between 20.4 and 21.4 will be shown as “20.9”. 3.3.10 Software info SOFTWARE INFO ▲ SOFTWARE INFO ST450EC OUTPUT 2.00 SENS OUTPUT ▼ BACK ← BACK Press to enter the sub menu SOFTWARE INFO.

  • Page 23: Output - Loop Test

    ▲ ▼ SELECT SELECT OUTPUT OUTPUT 15,84 ADJUST ▲▼ ADJUST ▲▼ ▲ ▼ ▲ ▼ SELECT SELECT OUTPUT OUTPUT 17,38 ADJUST ▲▼ ADJUST ▲▼ ▲ ▼ ▲ ▼ SELECT SELECT OUTPUT OUTPUT ADJUST ▲▼ ADJUST ▲▼ SELECT SELECT ST450EC v1.11...

  • Page 24: Calibration

    To guarantee an optimal use and a long life expectancy Consilium specifies a minimal calibration frequency for the ST450EC gas detector at delivery. The ST450EC has 2 calibration settings: the “zero” and “span” level. The calibration of the span level should be carried out using certified calibration gas.

  • Page 25: Calibration For Toxic Sensors And Oxygen Sensors

    OXYGEN SENSORS &PRESS SELECT o Always apply Nitrogen (N ) to IN PROGRESS perform a ZERO calibration, flow TEXT: [IN PROGRESS] 20-30l/h. BLINKS CAL TIMER STABILIZE or 60 sec. PASSED SAVE ZERO CALIBRATION CAL ZERO CAL ZERO PASSED FAILED ST450EC v1.11...

  • Page 26: Adjusting Sensitivity (Span Calibration)

    20.9 Vol. % Oxygen, CAL TIMER 180 s ec. otherwise use synthetic air for a SPAN calibration. CAL SPAN 50.0 IN PROGRESS PASSED LARGE SPAN CAL SPAN 50.0 LARGE SPAN SAVE SPAN CALIBRATION CAL SPAN CAL SPAN 50.0 28.0 PASSED FAILED ST450EC v1.11...

  • Page 27: Troubleshooting

    The following table contains the information needed to make a quick analysis of problems that may occur with the ST450EC gas detector. In case of doubt and/or severe problems, please contact the Consilium service department or a Consilium authorised service centre.
  • Page 28 ERROR GASTYPE Sensor is not connected Check the sensor and sensor (properly) connections. ERROR SENSOR GASTYPE Contact the Consilium Service Electronic defect department. ERROR GASTYPE Current source failure Check power supply. ERROR GASTYPE Sensor output failure Check if no gas is present Iout <...
  • Page 29 GASTYPE Try to get gas detector within 0.00 Temperature failure its temperature specifications. ERROR TEMP GASTYPE Contact the Consilium Service 0.00 Configuration corrupt department. ERROR CONFIG Status-LED action Cause Solution GREEN continuous Normal Operation Yellow flashing System failure Check the sensor connections.

  • Page 30: Usage In Explosion Dangerous Areas

    (not with a dry cloth) 7. LIABILITY IN CASE OF DAMAGES During use and maintenance of the ST450EC one must follow this guide and maintain as instructed. The instrument should only be used in applications as described in this manual. In case of repairs, only original Consilium parts should be used.

  • Page 31: Technical Specifications

    8. TECHNICAL SPECIFICATIONS Product Gas detector, type ST450EC Gas type Oxygen and Toxic gasses (O S, CO) Sensor type Electrochemical sensor (2 or 3 electrodes) Range Oxygen (O ), 0-25 Vol% Hydrogen sulphide (H S), 0-30 / 50 / 100 ppm...
  • Page 32 EN 50104:2010, EN 50271:2010 Conditions: Temperature range: -20 to +55°C Pressure range: 80 to 120 kPa Humidity range: 5 to 95 % RH Warm-up time 180 sec. Warranty 1 year Consilium reserves the right to alter these specifications without prior notice ST450EC v1.11...

  • Page 33: Parts And Accessories

    Flow regulator brass 9990600 l/min Flow regulator SS 9990601 Flow regulator SS (applicable for 58/110 gas liters), fixed flow 0,5 l/min Consilium offers a wide range of test gases, if the required test gas is not listed, please contact us. ST450EC v1.11...

  • Page 34: Appendices

    APPENDICES Connection data The following diagram shows a view of the main PCB of the ST450EC sensing head. The sensor is connected to connection block CN1. The connection cable (power supply and measurement signal) and the RS485 communication cable are connected to the connection block CON1.

  • Page 35: Dimensions And Mounting

    Dimensions and mounting Top view Side view ST450EC v1.11...

  • Page 36: Certificates

    Certificates The following certificate applies to the ST450EC sensing head: KIWA 16ATEX0008 X, IECEx KIWA 16.0003X With marking: IEC protection class Ex d IIC T6 Gb Ex tb IIIC T85°C…T200°C Db -20°C to +60° amb. ST450EC v1.11...
  • Page 37 ST450EC v1.11...
  • Page 38 ST450EC v1.11...
  • Page 39 ST450EC v1.11...
  • Page 40 EU Declaration of Conformity Issue: L04 Object of declaration: Gas detector for Toxic gases and Oxygen Product: BUTOX ST450EC Model/type: Manufacturer: Buveco Gasdetection BV Jan van der Heydenstraat 50 2665 JA BLEISWIJK - The Netherlands This declaration of conformity is issued under the sole responsibility of the manufacture.
  • Page 41 EU Declaration of Conformity Issue: M00 Object of declaration: Gas detector for Toxic gases and Oxygen Product: ST450EC Model/type: Manufacturer: BUVECO Gasdetection BV Jan van der Heydenstraat 50 2665 JA BLEISWIJK - The Netherlands This declaration of conformity is issued under the sole responsibility of the manufacture.
  • Page 42 NOTES ST450EC v1.11...
  • Page 43 NOTES ST450EC v1.11...
  • Page 44 BUVECO, a Consilium Group company, is specialized in:  Design  Production  Sales  Rental  Service and maintenance of industrial gas detection products for both portable and stationary use. Dutch gas detection equipment for your health and safety.

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