| |  ELSEC 764 and 764C
Overview
An hand sized instrument with an easy to read display, designed to be used by anyone, however technically literate, with little reference to an instruction manual.
► Replaces 4 separate instruments
► Easy one handed operation
► Ultra Violet (UV) level
► Visible light (Lux or Foot-candles)
► % Relative Humidity
► Dew point
► Temperature (oC or oF)
► Sized like a small mobile phone
Solid state sensors give accurate, drift free operation. The humidity sensor can be checked and recalibrated using an optional kit.
764 vs 764C The 764C is the same as the 764, with added data logging. Over 10,000 readings of all four parameters can be automatically taken at selectable intervals (every 10 seconds to 1 hour).
 Type 764C
Same as the 764, with added data logging. Over 10,000 readings of all four parameters can be automatically taken at selectable intervals (every 10 seconds to 1 hour). The saved data can then be transferred to a computer by a wireless infra-red link (IrDA compatible). This means that the unit need only be brought close to a PC with an infrared interface to download logged data, no cable or plugging/unplugging is required. Many modern computers have an infra-red interface built in; for those that do not, adapters are available.
When logging data the 764 can be turned off to save power and the built in clock will turn the unit on whenever a reading needs to be taken, this enables a 764 to be left taking readings for months at a time (10,000 readings at one per hour is more than a year). The clock can also be set to start logging at any time in the future (minutes or years ahead if required).
Software is provided to display the logged data as graphs, tables etc and export it in a CSV format that can be accessed and displayed by many programs (e.g. Microsoft Excel).
Specifications Measurement | Specification | Method of radiation detection | Twin silicon photodiodes connected to single chip microprocessor. | Visible wavelength range | 400-700nM (CIE response). No correction required for different light sources. | Visible power range | 0.1 - 200,000 Lux (0.1 - 20,000 Foot-candles). | UV wavelength range | 300 - 400 nM. | UV power range | 2 - 50,000 mW/M2. | UV proportion range | 0 - 10,000 mW/Lumen. | RH range | 0-100 %RH | Display resolution | Lux: 0.1 up to 100 then 1.Foot-candles: 0.1 up to 100 then 1.UV: 0.1 up to 100 then 1.Proportion of UV: 1 mW/Lumen.Temperature: 0.1oC or oF.RH: 0.1%. | Accuracy | Light: 5% +1 displayed digit.UV: 15%Temperature: 0.5oC (0.9oF).RH: 3.5%. | Angular response (Light & UV) | Cosine | Readout (764 & 764C) | 8 line graphical Liquid Crystal Display with automatic backlight. | Data logging time intervals | 10 seconds (30 hours), 1 minute (71/2days), 10 minutes (75 days), (Time till full) 1 hour (454 days). | Data logging storage capacity | 10,900 readings of all 4 parameters. | Logger name / serial number | Maximum 8 alphanumeric characters, adjustable by user. | Computer Interface | IrDA 1.0 compatible wireless infra-red link. | Date functions | Display as day-month-year or month-day-year. | Batteries | 2 off alkaline AA type. | Battery Life | Approx. 100 hours continuous use or 12,000 readings taking 30 seconds each. Battery life will be less if the 764 display backlight is used. | External Power Supply | 4.0-5.2V DC, 100 mA. A suitable mains power supply can be (Optional on 764 & 764C) provided as an optional extra, please specify mains voltage. | Operating Temperature | 0 to 50oC. | Dimensions | 150 x 65 x 25 mm (5.9 x 2.5 x 1 inches). | Weight with batteries | 165g (5.6 oz) |
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