1、 Product Overview

The ESA-3Z individual dust sampler is an instrument used to collect the average concentration of dust. Suitable for use in atmospheric environment monitoring, disease prevention and control, health and epidemic prevention, labor protection and other units. Instrument dust pre collector (sampling head), refer to page 390 of the "Methods for Monitoring Hazardous Substances in the Workplace" for standards. The sampling head is based on the principles of aerodynamics and human respiratory simulation to effectively separate respiratory dust that poses a threat to the human body. Its separation efficiency meets the "BMRC" curve standard.

The instrument has a compact structure, built-in high-energy rechargeable battery for long continuous operation time, stable performance, small size, light weight, and is easy to carry

2、 Working principle

Flow rate: 0.1~3L/min

Microcomputer constant current system control, LCD digital display system, menu setting, AC/DC dual-use.

3、 Performance characteristics

The main parts of the instrument are composed of diaphragm pump, regulating valve, buffer, flowmeter, central processing unit, etc.

1. The structure and assembly of diaphragm pumps adopt advanced technology, making small pumps have the advantages of compact structure, high efficiency, high pumping pressure, strong load capacity, stable flow rate, low power consumption, and low noise. At a load capacity of 100mmHg, approximately 1L/mn was still obtained. The pump valve plate is made of special rubber, which is resistant to acid and alkali, aging, and has a long service life. After long-term testing, its performance remains good. The pump power motor adopts electronic speed regulation, which can ensure stable operation of the motor even under significant voltage fluctuations and changes in dry battery voltage drops. When the load changes within a certain range during the sampling process, the electronic circuit can adjust the power to stabilize the flow rate of the diaphragm pump.

2. The time control processor of this instrument adopts a single-chip microcontroller for intelligent design, with high countdown accuracy and the ability to be set arbitrarily within the range of 99 hours and 59 minutes. Users often set the sampling time to 15 minutes, so in order to reduce operational trouble, a 15 minute startup state is set to make operation convenient and fast.

3. When the four characters of the undervoltage indicator flash intermittently during use, it indicates that the instrument battery is in an undervoltage state, and the battery needs to be charged at this time.

4. When the characters on the instrument display screen flash intermittently during charging, it is necessary to charge. Simply connect the charger to charge, and the red light will turn on during charging. When the battery is fully charged, the red light will turn off. Charging usually takes 14-16 hours (standard), and the instrument uses nickel hydrogen batteries without memory effect, so the capacity is large and the service life is long.

4、 Technical parameters

1. Sampling flow range: 0.1~3L/min

2. Flow error: ≤ 5％

3. Flow meter accuracy: 2.5*

4. Sampling time:>8 hours

5. Timing range: freely set within 99 hours and 59 minutes

6. Timing error: ≤ 1‰

7. * Large negative pressure: ≥ 35000pa

8. Working temperature: - 25～45℃

9. Storage temperature:- 40℃～+60℃

10. Environmental atmospheric pressure: 80KPa~110Kpa

11. Noise: ≤ 55dB

12. Relative humidity: ≤ 85％

13. Power supply: 10VDC, 220V 50Hz AC

14. Charging current: 300mA (standard type)

5、 Usage method

Press the power start button to turn on or off

Press to display 00:15 on the screen, which is 15 minutes. To change the time, press to change it. Press to enter the sampling mode of the instrument. At the end of sampling, OUER is displayed. Press → → to enter the shutdown state of the instrument.

Attention: If not in use for a long time, it is necessary to recharge the battery to extend its lifespan.

6、 Configuration Description

1 host

1 instrument box

One sampling head is commonly used for respiratory dust with a diameter of 25

Two sampling clips with a diameter of 25

1 box of Φ 25 filter membrane

Connect one rubber hose

1 camera

1 smart charger

1 backpack

1 copy of instruction manual

1 certificate of conformity

1 warranty card