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## Introduction
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This is a simple design for a UV-meter. It uses as much as possible
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ready-made components and will require a minimum amount of soldering.
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ready-made components and will need a minimum amount of soldering.
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It fully complies to the requirements, but will only need a sticker over
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the rightmost digit to comply.
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the rightmost digit to show in mMED/hr.
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## Components
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### Box
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- Serpac [M6](http://www.serpac.com/m6.aspx)
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- 105.41 mm x 60.96 mm x 21.59 mm
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- Integrated 9V battery compartment with contacts
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- Can be customised with [full colour
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printing](http://www.serpac.com/printing.aspx)
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Alternatively (but too large):
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- Serpac [H659V - Handheld 9V Remote Electronic
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Enclosure](http://www.serpac.com/h659v.aspx)
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- 125.48 mm x 69.85 mm x 23.98 mm
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- [Farnell/USA
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stock](https://fr.farnell.com/serpac/h-65-9v-bk/enclosure-hand-held-plastic-black/dp/9254935)
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\< 10 Euro
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- Serpac [H65 Shock Absorbing
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- A cool yellow protection exists: Serpac [H65 Shock Absorbing
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Boot](http://www.serpac.com/H65-Boot.aspx)
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- Cool yellow protection
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Design
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- Need cutouts for display, pushbutton, sensor, hole for calibration
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- Printed customisation by factory or with sticker
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-----
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### Display/voltmeter
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- Murata [31⁄2 Digit, LCD Display Digital Panel Voltmeter
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DMS-20lcd-1-9-c](https://www.murata-ps.com/datasheet?/data/meters/20lcd.pdf)
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- 2V full range
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- Auto-zero, full-scale calibration with
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screwdriver
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- [Arrow](https://www.arrow.com/en/products/dms-20lcd-1-9-c/murata-power-solutions)
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- [DMS Application note 3: Analog Common and Reference
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in-out](https://www.murata-ps.com/data/meters/dms-an3.pdf)
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-----
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### UV-sensor
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- sglux [SiC UV TOCONs / Broadband UV
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sensor](https://sglux.de/en/product-category/sic-uv-tocons/broadband-tocons/)
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- [TOCON\_ABC5](https://sglux.de/en/product/tocon_abc5-en/)
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- Gives 0-5V output
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- Lower and higher sensitive sensors exist
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Not needed: digital calibration could be made with a [TOCON Adjustment
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board](https://sglux.de/en/product/tocon-adjustment-board/)
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-----
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### Printed Circuit Board
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- Holds
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- TOCON (via additional board?)
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- Display/voltmeter
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- Needs careful adjustment in height, or with socket that
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allows movement? Or wire the display up to the PCB?
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- Allow for hole to reach calibration screw
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- Resistors for the full-scale adaptation from 0-5V to 0-2V (1%
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metal-film)
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- Final calibration on Display/Voltmeter
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- Push button (height should be right)
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- Wires up to 9V holder
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-----
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### Various
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- 9V battery
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-----
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