WEF-PM2.5 constant temperature and humidity weighing system

Product introduction

　At present, the ordinary constant temperature and humidity weighing system on the market can no longer meet the requirements of the national standard, Wolf (Luoyang) Furnace Industry Co., Ltd. according to the new standard requirements, the Ministry of Environmental Protection issued a new determination standard for the low concentration of waste waste from fixed pollution sources: "Determination of low concentration particulate matter in the exhaust gas of fixed pollution sources" (HJ836-2017). HJ836-2017 "Determination of Low Concentration Particulate Matter in Exhaust Gas from Fixed Pollution Sources" Detection Limit: Modification of "Determination of Particulate Matter in Fixed Pollution Sources and Sampling Method for Gaseous Pollutants" (GB/T16157-1996): Add "1.2 When determining the concentration of particulate matter in the exhaust gas of fixed pollution sources, the concentration is less than or equal to 20mg/m3, which is applicable to HJ836 ("Determination of Low Concentration Particulate Matter in Exhaust Gas from Fixed Pollution Sources"), and the concentration is greater than 20mg/ When m3 does not exceed 50mg/m3, the measurement result states that "less than 20mg/m3, and a low-concentration weighing constant temperature and humidity equipment that meets the requirements of the new national standard HJ836-2017 has been developed. It breaks the monopoly of foreign equipment in this regard, makes the product price closer to the market demand, and is more convenient for the promotion of new standards.WEF-PM2.5 constant temperature and humidity weighing system is to meet the requirements of the Ministry of Environmental Protection in the new international HJ836-2017 "Determination of Low Concentration of Fixed Pollution Sources" on post-sampling weighing conditions, place a high-precision balance in a constant temperature and humidity environment, and put the sample to be weighed into a constant temperature and humidity box for 24 hours before weighing. This product solves the influence of the change of temperature and humidity in the laboratory environment on the weighing results of the sample, greatly improves the accuracy of the weighing sample results, and is also used for the weighing of samples with high requirements in other weighing environments.　

Product Features

High accuracy of constant humidity control, meeting the requirements of national standard HJ836-2017 and HJ656-2013.

2. The system has a high stability process, and the weighing test can be carried out after stabilization, and there is no need to wait for the compressor to stop before weighing.

3. The man-machine interface adopts a 7-inch touch screen, beautiful and durable, truthfully displays the temperature and humidity values, and can view the temperature and humidity fluctuation curves separately through the temperature and humidity curves, and view the temperature and humidity historical data through the table records.

4. The constant temperature and humidity box adopts a reasonable circulating wind method, the wind force is soft and the wind direction is reasonable, which not only has uniform temperature and humidity in the box, but also does not interfere with the weighing of the balance due to too strong wind.

5. The compressor unit and box adopt the overall transportation/split operation structure, which not only facilitates transportation and installation, but also effectively avoids the influence of compressor vibration on the weighing balance, and overcomes the problem of shockproof and silent.

6. The heating and cooling system is complete and independent.

7. Air circulation system: temperature-resistant and low-noise air-conditioning motor, multi-blade axial flow wind wheel.

8. There are two operation entrances on the box, and they are isolated with latex long gloves to avoid the influence of constant temperature and humidity conditions during manual operation.

9. Overall equipment overtemperature, overload, leakage protection, compressor overpressure protection, low pressure protection.

10. Equipped with different sample holders, different samples can be weighed.

11. Optional electronic balance with high accuracy of one hundred thousandth, Chinese operating system, dual range, automatic calibration.

12. The frequency conversion compressor unit is adopted, and the refrigeration effect is good.

13. Humanized design: with casters, split type, easy to handle.

14. Equipped with 7-inch touch screen, printer and USB interface.

Technical parameters