Ningbo Jiangnan Instrument Factory supports the implementation of the new environmental protection standard "Determination of Low Concentration Particulate Matter in Fixed Pollution Source Exhaust Gas by Weight Method" (HJ836-2017)

Guide

Recently, the Ministry of Environmental Protection of China released a new standard for measuring low concentrations of fixed pollution source exhaust gas: "Determination of Low Concentration Particulate Matter in Fixed Pollution Source Exhaust Gas by Weight Method" (HJ836-2017). The new standard will be officially implemented on March 1, 2018. At the same time, the Ministry of Environmental Protection of China has revised the "Determination of Particulate Matter and Sampling Methods for Gaseous Pollutants in Fixed Pollution Sources" (GB/T16157-1996), which will also be implemented together with HJ836-2017. The release of this new standard is bound to touch the hearts of millions of environmental testing personnel.

JNVN-800S Low Concentration Weighing Constant Temperature and Humidity System

1、 Product Introduction
The JNVN-800S low concentration weighing constant temperature and humidity system is suitable for manually weighing low concentration particulate matter such as fixed pollution source exhaust gas. A high-precision electronic balance is placed in the working chamber of the equipment, and the sample to be weighed is manually weighed after 24 hours of balancing in the equilibrium zone of the constant temperature and humidity chamber. The work cabin can be sealed to ensure effective isolation of the system from external dust; This product solves the problem of the influence of temperature and humidity changes in laboratory environment on sample weighing results, greatly improving the accuracy of weighing results; The stable and adjustable constant temperature and humidity control system ensures the accuracy of the sample weighing results and the stability of the sample weighing data; No additional construction of a constant temperature and humidity laboratory is required. Multi level shock resistant technology and system decoupling design ensure that precision electronic scales are not affected by micro vibration interference. This product can be widely used in environmental monitoring stations, meteorological monitoring stations, scientific research, and third-party testing laboratories.

2、 Product Parameters: JNVN-800S Low Concentration Weighing Constant Temperature and Humidity System
1. Sealed: The weighing room adopts an integrated structural design with good sealing performance; Avoid secondary pollution of atmospheric dust.
2. Constant temperature and humidity: Controlled by a microcomputer, it will automatically prompt an alarm when a fault occurs.
3. Monitoring: Real time monitoring of the weighing environment inside the box.
4. There is good grounding and grounding identification.
5. The humidifier adopts an external humidification function and can be optionally supplied with tap water directly. The humidification function requires manual addition of water (tap water or purified water are both acceptable).
6. The sample placement area is made of rust proof stainless steel material. (Optional installation of marble countertop)
7. Static electricity removal: automatically removes static electricity from the sample (with electrical grounding function)
8. Anti vibration: 4.5 level anti vibration function, the main chassis is equipped with pulleys, self-locking function, easy to move and fix the whole machine, and has adjustable fixed foot support; The casters come with adjustable horizontal and shock-absorbing functions.
9. Temperature
9.1 Temperature control: 15-30 ℃, can be set at any point (factory setting is 20 ℃);
9.2. Temperature resolution: 0.1 ℃;
9.3. Temperature fluctuation range: ± 0.8 ℃; (@20℃)
10. Humidity
10.1 Humidity control: 30% RH~70% RH, can be set at any point (factory setting is 50% RH);
10.2. Humidity resolution: 0.1% RH;
10.3. Humidity fluctuation range: ± 4.5% RH; (@ 50% RH)
11. Balance scale
Optional 1/100000 precision balance (purchased by the user);
11.1. The controller instrument can monitor the temperature and humidity inside the box in real time; Optional touch screen device;
11.2 Working hours: 1-9999 hours can be set or run continuously;
11.3 Working environment: Temperature of 10-35 ℃, humidity below 85% RH, no corrosive gases;
11.4. Compressor delay protection time: about 3 minutes;
11.5 Working mode: Continuous operation (intermittent operation of compressor);
11.6. Power requirements: 220V (range 187-246V), 50HZ;

3、 Product Features: JNVN-800S Low Concentration Weighing Constant Temperature and Humidity System

① Realize sample equilibrium in a high-precision constant temperature and humidity chamber.
② Realize the interference free operation of electronic scales in high-precision constant temperature and humidity clean environments.
③ Realize sample balancing and weighing in the same constant temperature and humidity chamber to ensure the accuracy of sample weighing results.
④ The constant temperature and humidity box adopts a specially designed advanced circulating air method to ensure uniform temperature and humidity inside the box.
⑤ Realize the separation of vibration sources such as compressors from the box body, flexible connection, overcome the problem of shock resistance and noise reduction, and avoid the interference of equipment vibration on the balance weighing.
⑥ There are two operation entrances on the box, which are isolated with latex gloves to avoid the influence of manual operation on constant temperature and humidity conditions.
⑦ The balance workbench is equipped with multi-level shock-absorbing devices to ensure stable operation of the balance.
⑧ Standard purified water circulation water supply method for humidification; Optional tap water direct supply humidification function.