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Summary of Contents for Calex ExTemp Series
- Page 1 ExTemp Series Intrinsically Safe Infrared Temperature Sensor and LCT Loop Configuration Tool Operator’ s Guide...
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Page 2: Safety Parameters
INTRODUCTION ExTemp intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a two-wire, linear 4-20 mA output. Temperature ranges from -20°C to 1000°C are available. All models have an adjustable emissivity setting, and may be used to measure a wide variety of target materials, including food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, asphalt and paint. - Page 3 Zone Description Supported? Explosive gas air mixture continuously present. Explosive gas air mixture likely to occur in normal operation. Explosive gas air mixture not likely to occur, and if it does it will only exist for a short time. Dust Explosive atmosphere in the form of a cloud of ...
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Page 4: Model Numbers
MODEL NUMBERS Cable Length = 5 m 10 = 10 m 25 = 25 m User Configurable C = Configurable via optional USB adapter Temperature Range LT = -20°C to 100°C MT = 0°C to 250°C HT = 0°C to 500°C XT = 0°C to 1000°C ST = Special temperature range Temperature range may be re-scaled... -
Page 5: Dimensions (Mm)
M20 x 1.5 mm thread, length 46 mm, supplied with two mounting nuts Cable Length Choice of 5 m, 10 m or 25 m factory-fitted. Contact Calex for information about extending cable. Weight with 5 m Cable 475 g Environmental... -
Page 6: Installation And Maintenance
• Certificate of calibration • Extended cable (25 m max. factory-fitted; contct Calex for information about extending the cable) OPTICS The below chart shows the measured spot diameter at the given distances from the sensing head and assumes 90% energy. The sensor may be used at longer distances than shown below, with a larger measured spot size. -
Page 7: Mechanical Installation
Wiring Check the distance between the sensor and the indicating/controlling device. If necessary, the sensor can be ordered with a longer cable attached. Contact Calex for information about extending the cable. Power Supply A suitable intrinsically safe barrier or isolator must be used. See Specifications for the supply voltage, current and safety requirements. -
Page 8: Mounting Brackets
MOUNTING BRACKETS AIR PURGE COLLAR The lens must be kept clean and dry for an accurate reading. The optional air purge collar is used to keep dust, fumes, moisture, and other contaminants away from the lens. It must be screwed on fully. Air flows into the hose barb fitting and out of the front aperture. -
Page 9: Electrical Installation
ELECTRICAL INSTALLATION An alternative certified Intrinsically Safe isolator or safety barrier may be used. The connections shown above are for the suggested isolator, model MTL 5541. WIRE IDENTIFICATION - EXTEMP SENSOR Identification tags are attached to the PWR+ and PWR- wires. If the tags are removed, the wires can be identified by the numbers marked on the black insulation: Wire Markings Wire Identity... -
Page 10: Configurable Parameters
From the Settings menu, go to Emissivity and Compensation. • Emissivity Setting Enter the emissivity of the target. Target emissivity can be determined experimentally, or estimated using an emissivity table. For more information, contact Calex. Default setting: 0.95 • Reflected Energy Compensation On/Off If enabled, compensates for errors caused by reflected energy from hotter or colder objects. -
Page 11: Maintenance
IMPORTANT Be aware of the following when using the sensor: • If the sensor is exposed to significant changes in ambient temperature (hot to cold, or cold to hot), allow 20 minutes for the temperature to stabilise before taking or recording measurements. -
Page 12: Electrical Connection
LOOP CONFIGURATION TOOL (LCT) The Loop Configuration Tool model LCT is a configuration adapter for ExTemp infrared temperature sensors. It is designed to be connected to the 4 to 20 mA current loop on the safe side of an Intrinsically Safe barrier or isolator, and to a Windows PC via USB. - Page 13 EXAMPLE ISOLATOR: MODEL MTL5541 This isolator has an internal resistance of 220Ω. Two wiring configurations are possible, depending on whether or not this internal resistance is used. Configuration A: 400 Ω ≤ RL ≤ 800 Ω (not using the internal resistance) MTL5541 4/20 mA Configuration B:...
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Page 14: Using The Software
SOFTWARE The latest version of the software is available for download from the Calex website at the following URL: www.calex.co.uk/software Install the software before connecting the LCT to a Windows PC. This will ensure the driver is properly installed. USING THE SOFTWARE See Configurable Parameters and the Configuration Software diagram opposite. -
Page 15: Configuration Software
CONFIGURATION SOFTWARE Connection List Select connected sensor Temperature Display Temperature List Unlock Settings Graph Default Password: 1234 Exit Clear graph Unlock Change Password Apply (save and exit) 4 to 20 mA Emissivity & Processing Output Compensation... - Page 16 Issue O - Aug 2018 Calex Electronics Limited PO Box 2, Leighton Buzzard, Bedfordshire, England LU7 4AZ Tel: +44 (0)1525 373178 Fax: +44 (0)1525 851319 Email: mail@calex.co.uk Online: www.calex.co.uk...
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