Summary of Contents for ELSEC 765
- Page 1 765 & 765C 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 765.docx V4.7...
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Page 3: Table Of Contents
CONTENTS INTRODUCTION ......................1 BASIC OPERATION ....................2 Set Button ......................2 Firmware and Hardware ..................3 UNITS OF MEASUREMENT ..................4 Ultra-Violet (UV) ..................... 4 Visible Light ......................4 Temperature, Humidex & Heat Index ..............5 Humidity ......................... 5 Atmospheric Pressure .................... -
Page 4: Introduction
One of the primary responsibilities of the custodian of artworks and museum artefacts is to preserve them for future generations. How they are stored and displayed is central to this, the 765 Environmental Monitor is an easy to use tool to help in achieving the safest long term protection. -
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 20 seconds after the button is released unless a button is held down for over 3 seconds, this will cause readings to be taken continuously until a button is pressed again. -
Page 6: Set Button
G: H shows that the reading is “Held” and the unit will turn itself off after 10 seconds of inactivity. A round blob “●” shows the unit is in continuous reading mode until a button is pushed, nothing here means that a single reading is being taken. -
Page 7: Firmware And Hardware
To take a measurement without having to look at the display while the reading is taken (for example where the operators head may affect the reading) proceed as follows: 1. Position the monitor where the reading is to be taken. 2. -
Page 8: Units Of Measurement
Which is displayed where can be swapped by pressing Set\Units\µW/Lumn-mW/M². When measuring low levels of UV the 765 can take up to 5 seconds to take the reading. So, to get a reasonably quick response, when initially turned on, the unit only measures for one second and if UV levels are low this will show as zero. -
Page 9: Temperature, Humidex & Heat Index
The UK National Trust tries to keep the indoor relative humidity between 50% and 65%, aiming for 58%. Also shown in later versions of the 765 with a pressure sensor is the Absolute Humidity in g/m³ Atmospheric Pressure Later versions of the 765 (V13 hardware or greater) have a pressure sensor. -
Page 10: Display
DISPLAY Brightness As supplied the 765 automatically adjusts the display brightness to suit the ambient light level. For a fixed brightness press Set\Display\Manual and select a brightness level between 0 (dim) and 127 (bright) before pressing Set. To make the display brightness automatic again press Set\Display\Auto The display uses a large amount of battery power, the brighter it is the quicker the batteries run down. -
Page 11: Date Format
Date Format The time and date are shown at the bottom of the display with every reading. The date is normally displayed as day-month-year, this can be changed to the American format (month-day-year) by pressing Set\Clock\DMY-MDY. The format can be restored to day-month-year by repeating this. -
Page 12: Data Logging
DATA LOGGING Data logging is an optional extra and is only available on the 765C. A standard 765 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. -
Page 13: Storage Capacity
Storage Capacity The storage capacity is over 73,000 readings of all 4 parameters (UV, Visible light, temperature and humidity). The other values (e.g. dewpoint and µW/Lumen) are calculated from the 4 saved parameters. Log Period Log time for 73,000 records 10 seconds 8+ Days 1 Minute... -
Page 14: Format
RView can be downloaded from the “Accessories” section on the Littlemore Scientific web site, www.elsec.com. 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 15: Data Format
Check the time/value of a point on the graph. Move the mouse cursor to the point of interest, the time and value represented by the position is shown on a status bar at the bottom of the window. Add/Change the title of the graph. Press the Titles button on the toolbar and enter the title as required. -
Page 16: Batteries
We have successfully tested Sanyo “eneloop”. Non Standard Batteries In an emergency any AAA size 1.2 – 2V battery can be used in the 765 with the following limitations: • If using non-rechargeable types (eg alkaline) NEVER try to charge the batteries. -
Page 17: Charging
USB cable supplied. Turn on the 765 by pressing any button briefly and charging will start indicated by the red lamp to the left of the display. The 765 needs to be on for charging to start but can be allowed to turn off while charging continues. -
Page 18: Calibration
Humidity Like most other RH sensors the 765 should be checked every 6 months or a year. This can be done by returning the unit to the manufacturer, by using the optional humidity calibration kit or by comparison to another known good source. - Page 19 2 hours. 5. Insert the 765 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 unit so that it and the sample chamber are level.
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Page 20: Temperature
Temperature The 765 is fitted with a solid state temperature sensor that should not normally require calibration. This sensor is part of the RH sensor and so can be replaced in the same way as above. UV & Visible Light The 765 calibration should not drift with time but to be sure of accuracy the instrument can be returned to the manufacturer for a calibration check every 2-5 years. -
Page 21: Maintenance
It is permissible to use a cloth dampened with clean water, ethanol, methylated spirits or iso propyl alcohol (IPA) to clean the outside of the 765. Keep all fluids and other contaminants away from the humidity sensor in the probe at the top of the instrument. -
Page 22: Service And Support
Dorset UK SP8 5QP Tel: 01747 835550 Fax: 01747 835552 Email: support@elsec.co.uk http://www.elsec.com 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 23: 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. 0.1 - 200,000 Lux (0.1 – 20,000 Foot-candles) Visible power range UV wavelength range 300-400 nM UV power range 5 - 10,000 mW/M 0 - 10,000 W/Lumen...
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