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pm2.5检测仪器元件说明书

日期:2020-03-27 12:18
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摘要:
pm2.5检测仪器元件说明书

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1.Scope
This specification establishes the configuration, performance, test and acceptance requirement
for Particulate Matter Sensor Model PD4NS
2.Configuration
The configuration and connector pin allocation are shown in the attached drawing Fig1.
3.Sensor Performance
This sensor is to create Digital (Lo Pulse) output to Particulate Matters(PM).
Lo Pulse Occupancy time (LPO time) is in proportion to PM concentration.
The output from “P1” is for PM whose size is around 1 micro meter or larger.
“P1” Output characteristics is shown in the attached drawing Fig2.,when tested in standard
condition stipulated below.
4. Specification
4-1. Detectable particle size: approx. 1m (minimum.)
4-2. Detectable range of concentration: 0~28,000 pcs/liter (0~8,000pcs/0.01 CF=283ml)
4-3. Supply Voltage : DC5V +/- 10% (CN1:Pin1=GND, Pin3=+5V)
                  Ripple Voltage within 30mV
4-4. Power consumption: 90mA
4-5. Operating condition range
Temperature: 0~45°C
Humidity: under 95%RH max.(without dew condensation)
4-6. Recommended storage condition: -30~60°C
4-7. Time for stabilization: 1 minute after power turned on
4-8. Dimensions: 59(W)  45(H)  22(D) [mm]
4-9. Weight: 24g(approx.)
4-10. Output Method: Negative Logic, Digital output,
Hi : over 4.5V Lo : under 0.7V
(As Input impedance : 200k)
                  Op-Amp output, Pull-up resistor : 10kΩ


PRODUCT SPECIFICATIONS PD4NS 2

5. Standard test Method
Burn two pieces of cigarettes in an ambient of temperature 23 +/- 7°C to generate cigarette
smoke in the room. Then extinguish them after fully burned out, use air purifier (with HEPA
filter) to lessen the concentration of smokes. Check the sensor output variation in accordance
with fluctuation of concentration.
Sensor output characteristics should be set in between standard “upper limit” sensor and
standard “lower limit” sensor.
Particle counter is to be referred for the smoke concentration.
Cigarette: 1 pcs. Cigarette (Japanese Brand :Mild seven)
Particle counter: RION Co., Ltd. Model No. KC-01B or KC-01C or KC-01D
(particle size level : 1m min.)
Smoke generator: Automatic smoke suction machine
(Japan Electric Industrial Organization JEM1467)
Room capacity: 20~30m3
Stirring: Stir by electric fan. During the test, collect dusts
by air purifier, and lessen the concentration rate of cigarette smoke.
Sensor setting location: Center of the room, 40~80cm height from the floor level.
Rated input voltage: DC5V +/- 2%

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9. Open-Short Circuit Test
9-1. Test method :
Keep the mutual terminals of electronic parts in short circuit, or keep the terminals
opened, and supply the electric current to it.
9-2. Characteristics :
Not to cause the smoking, firing, burning on the electric circuits, for which open-short
circuit test was taken. But the simple smoke or burn, which is not in danger of fire
can be disregarded.

PRODUCT SPECIFICATIONS PD4NS        4

10. Tracking Endurance Test
10-1. Test method :
Drops 5% saltwater 200 times on the printed board with 30 seconds interval.
10-2. Characteristics :
Not to cause the smoke or fire.
11. Solder Crack Test
11-1. Test method :
Repeat 200 times of following cycle. Have the sensor to be kept in the atmosphere
of -40°C for 1 hour, and then move it within 10 seconds to the atmosphere of
+80°C and have it kept for 1 hour.
  11-2. Characteristics :
Not to crack


12. Life expectancy
The light emitter is continuously turned on for 7 years minimum.
13. Maintenance of the Sensor
Lens need to be cleaned depending on the condition. Cigarette tar on the lens should affect
the sensitivity of the sensor. Wet a end of the swab with water and wipe the lens with it and
then dry lens with the other end of swab.
14. Standard Sensor
We hold “upper limit” sensor and “lower limit” sensor as standard against which every unit
of sensor to be set its characteristics in between upper and lower limit characteristics curve.
Those standard “upper limit” sensor and “lower limit” sensor are to be tested, calibrated
periodically.
15. Instruction for operation / Caution
15-1. Setting position : Use it at the Vertical position (within +/- 3° )
15-2. Please have a kind of door to cover the front window to make sensing area completely
dark condition
15-3. Don’t use in an ambient of the organic gas and flammable gas.
15-4. Don’t use the material such as alcohol to clean the lens. Use water only.
16. Marking for Lot Number
Indicate the model number, date of manufacture on PCB by silk screening.
17. Specification is subject to change for improvement, without prior notice.


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