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Summary of Contents for ELSEC 764
- Page 1 764 ENVIRONMENTAL MONITOR USER MANUAL LITTLEMORE SCIENTIFIC ENGINEERING (ELSEC) Gutchpool Farm Gillingham Dorset Tel: (+44) (0)1747 835550 Fax: (+44) (0)1747 835552 Email: elsec@elsec.co.uk 764.DOC V3.702...
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Page 3: Table Of Contents
CONTENTS INTRODUCTION ....................1 BASIC OPERATION ..................2 Set Button ...................... 3 UNITS OF MEASUREMENT................4 Ultra-Violet (UV) .................... 4 Visible Light ....................5 Temperature ....................6 Humidity ......................6 MAXIMUM AND MINIMUM ................7 DISPLAY ......................8 Contrast ......................8 Backlight ...................... -
Page 4: Introduction
% relative humidity and temperature as °C or °F. The 764 can be left for extended periods to log the above parameters at a user set interval (10 seconds to 1 hour). The saved data can then be transferred to a computer for display, graphing etc. -
Page 5: Basic Operation
BASIC OPERATION To take a reading the appropriate yellow button is pushed depending on the measurement required and the reading is taken. UV= Ultra Violet (µW/lumen or mW/M Vis= Visible light (Lux or Foot-candles) T= Temperature (Centigrade or Fahrenheit) RH= Humidity (%Relative Humidity) The unit automatically turns off 10 seconds after the button is released unless a button is held down for over 5 seconds, this will cause readings to be taken continuously until a button is pressed. -
Page 6: Set Button
The above format is slightly different for some parameters and can be altered by the user if required, see below. Set Button The blue Set button is used to access advanced functions, change units etc. If it is pushed once a menu similar to that below is shown: Max-Min>... -
Page 7: Units Of Measurement
UNITS OF MEASUREMENT Ultra-Violet (UV) Traditionally UV has been measured in museums as the proportion of ultraviolet present. This result is useful for checking a particular lamp or window because the proportion of UV does not change with the distance from the light source. Using a simple rule the amount of UV on an object can be limited. -
Page 8: Visible Light
Visible Light This can be displayed either in Lux or Foot-candles. To change the units press Set\Units\Lux-Footcandl. A visible light readout is provided to control illumination and limit damage done by visible light. Normal museum light levels should be limited to 150-250 Lux. Once measurements have been made the light level can be altered if necessary and UV filters can be fitted on windows, fluorescent tubes or other UV producing light sources as required. -
Page 9: Temperature
(form mist/cloud or drops of water on a surface), the relative humidity has reached 100%. The temperature at which this happens is the dewpoint. The 764 displays the dewpoint with the humidity and with the temperature. -
Page 10: Maximum And Minimum
MAXIMUM AND MINIMUM The maximum and minimum values for each unit are displayed along with the day of the month and time the maximum or minimum occurred. The values can be reset by pressing Set\Max-Min\Reset (This equates to pressing Set 3 times). -
Page 11: Display
DISPLAY Contrast The display contrast can be increased/decreased by pressing Set\Display\Contrast UP or DOWN. If this is done the menu continues to be displayed and the set button can be pressed repeatedly until the required contrast is achieved. Backlight The display backlight operation can be adjusted from the Set\Display menu as follows: Menu item Action... -
Page 12: Data Logging
DATA LOGGING Data logging is an optional extra. A standard unit can be upgraded to include data logging by returning it to the manufacturer. If data logging is not fitted then the relevant menu items are not displayed. If data logging is fitted “Data logging” is one of the options when the Set button is pushed. -
Page 13: Stop Logging
"Logger/Set & Download" from the menu. Something similar to the following is displayed: If "Auto Download" is checked then any new data is downloaded as soon as contact is made with the logger. 3. Select Set\Data logging\Transmit on the 764. - Page 14 The infrared link can be closed by pressing the 'X' key on the 764 or closing the "Set & Download" window on the PC. If the 764 is just taken away without the link being officially terminated the computer will complain that it has lost communication, this does not matter.
- Page 15 · If power has been lost then the 764 may forget how many records it has saved and no data will be transferred. It is possible to force the 764 to transmit data by selecting “File\Get Data”...
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Page 16: Installing The Software
Windows. Others require software to be installed BEFORE they are plugged in. Test the infrared adaptor: Aim the 764 at the computer IR port and select SET\Data Logging\Transmit. After a few seconds the 764 should recognise the presence of the PC and display the PC name (No data will be transmitted unless the RView program is running). -
Page 17: Viewing The Results Using Rview
Viewing the Results using RView For more detailed information on RView see the help file. When RView is started an empty window is shown. One or more data files can be opened by selecting File\Open on the menu or pressing the appropriate button on the toolbar. -
Page 18: Clock
CLOCK The 764 has a built in clock, this is used to show the time of maximum and minimum values and for data logging. The date functions are valid until January 2098 so the unit is completely year 2000 compliant. -
Page 19: Maintenance
Software Version The internal software version is displayed when the 764 is turned on. A typical start- up message might be “ELSEC 764 V2.1”, in this case the software version is 2.1... -
Page 20: Calibration
Humidity Like most other RH sensors the 764 should be checked every 6 months or a year. This can be done by returning the unit to the manufacturer or by using the optional humidity calibration kit. - Page 21 5. Insert the 764 sensor probe into the side hole of the Magnesium Chloride chamber, push it all the way in. A support stand is provided to place under the 764 so that it and the sample chamber are level. Be sure not to get any paste on the sensor.
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Page 22: Temperature
Temperature The 764 is fitted with a solid state temperature sensor that should not normally require calibration. The unit can be checked by putting it together with another, known accurate, temperature measuring device for at least an hour. Make sure that the two sensors are within 2cm (1") of each other and that neither are close to anything hot or cold,... -
Page 23: Uv & Visible Light
(e.g. ordinary filament light bulbs). Because the 764 has a cosine angular response it may give different readings to a type 762 which is relatively directional. In other words the 764 is more sensitive to light coming at an oblique angle than the 762. -
Page 24: Service And Support
Dorset UK SP8 5QP Tel: 01747 835550 Fax: 01747 835552 Email: support@elsec.co.uk http://www.elsec.co.uk This equipment complies with EU Directive 2002/96/EC The symbol of the crossed container on the equipment shows that the product, at the end of its useful life, must be collected separately from other refuse. When it is disposed of in the European Union it should be placed with other electronic waste at the place designated by the waste collection authority. -
Page 25: Specifications
SPECIFICATIONS Method of radiation detection Twin silicon photodiodes connected to 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/M 0 - 10,000 mW/Lumen...
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