... | @@ -4,7 +4,8 @@ |
... | @@ -4,7 +4,8 @@ |
|
|
|
|
|
## Introduction
|
|
## Introduction
|
|
|
|
|
|
The requirement for XP applications is to measure very low levels of UV.
|
|
The requirement for XP applications is to measure very low levels of
|
|
|
|
UV.
|
|
Most of the sensors on the market are for high levels (for warning of
|
|
Most of the sensors on the market are for high levels (for warning of
|
|
getting a sunburn on normal skin), and so cannot be
|
|
getting a sunburn on normal skin), and so cannot be
|
|
used.
|
|
used.
|
... | @@ -15,7 +16,50 @@ la Lune** |
... | @@ -15,7 +16,50 @@ la Lune** |
|
|
|
|
|
-----
|
|
-----
|
|
|
|
|
|
## Requirements
|
|
-----
|
|
|
|
|
|
|
|
## Functional specification (December 2018)
|
|
|
|
|
|
|
|
1. Sensor: [unfiltered SiC photodiode from
|
|
|
|
sglux](https://sglux.de/en/product-category/sic-uv-photodiodes/broadband-photodiodes/)
|
|
|
|
or [TOCON version of unfiltered SiC photodiode with integrated
|
|
|
|
amplifier](https://sglux.de/en/product-category/sic-uv-tocons/broadband-tocons/).
|
|
|
|
2. Display on top of the meter.
|
|
|
|
3. Press-and-hold power button (on top of the meter) to make a
|
|
|
|
measurement. Releasing the power button fully switches off the
|
|
|
|
device.
|
|
|
|
4. Reading of 00 mMED/hr up to 199 mMED/hr (disabling the rightmost
|
|
|
|
digit of a 3½ digit display).
|
|
|
|
- *Internal* precision in 0.1 mMED/hr.
|
|
|
|
- For calibration the digit on the right can be enabled, allowing
|
|
|
|
the internal precision of 0.1 mMED/hr to be shown.
|
|
|
|
- Reading should be stable within two seconds.
|
|
|
|
|
|
|
|
#### Calibration
|
|
|
|
|
|
|
|
1. Enable the rightmost digit, allowing the internal precision of 0.1
|
|
|
|
mMED/hr to be shown.
|
|
|
|
2. Calibrate against a calibrated CIE 1987 erythema weighted instrument
|
|
|
|
with a source spectrum of natural unfiltered sunlight.
|
|
|
|
- Any value between 50.0 mMED/hr and 199.9 mMED/hr may be used to
|
|
|
|
calibrate.
|
|
|
|
- Difference between the two meters may be +/- 0.3 mMED/hr.
|
|
|
|
- Verify with no light on the sensor a reading of 00.0 +/- 0.3
|
|
|
|
mMED/hr.
|
|
|
|
3. Disable the digit on the right with an internal switch or jumper,
|
|
|
|
|
|
|
|
#### Technical implementation suggestions
|
|
|
|
|
|
|
|
- Handheld box: [Serpac M6](http://www.serpac.com/m6.aspx).
|
|
|
|
- Enable the rightmost digit with an internal switch or jumper that
|
|
|
|
can be reachable via the battery trap.
|
|
|
|
- Power supply by a single 9V battery.
|
|
|
|
|
|
|
|
-----
|
|
|
|
|
|
|
|
-----
|
|
|
|
|
|
|
|
## Original User Requirements (Summer 2016)
|
|
|
|
|
|
#### The following requirements were agreed on in the Summer camp 2016:
|
|
#### The following requirements were agreed on in the Summer camp 2016:
|
|
|
|
|
... | @@ -215,5 +259,5 @@ December 16, 2018 |
... | @@ -215,5 +259,5 @@ December 16, 2018 |
|
|
|
|
|
-----
|
|
-----
|
|
|
|
|
|
17 December 2018
|
|
18 December 2018
|
|
|
|
|