1. Incoming sample requirements: 4 low bendi alpha beta meter must be equipped with four independent sample ejector plates, which are flexible in the sample manner, and provide the sample of the equipment to take pictures to prove it.
There must be only one sample slot for each sample tray to place the sample tray.
U 3, instrument of four sample board finished samples separately the total alpha beta outcome measures, each sample smoke board can separate print measurement results, print the results report shows only the selected channel.
4. The instrument can still be placed on the fourth sample drawing board at the same time as the instrument is working at any three incoming sample.
5. The measurement results can be saved automatically after the measurement of each channel of the instrument.
6. The instrument adopts the 1-10 road combination low background alpha beta measurement system, and the measurement channels can be extended to 10 road, and provide the software copyright certificate of the 1-10 combination low background alpha beta measurement system.
The counting rate of alpha particles in the unit area is less than 0.003 cm-2min-1;
8. The counting rate of the beta particles in the unit area is less than 0.15 cm-2min-1;
9, instrument for 239 pu alpha source (active area Φ 25 mm) of two PI detection efficiency more than 85% or higher;
10, instrument for 90 sr - 90 y beta source (20 mm) active area Φ 2 PI detection efficiency more than 55% or higher;
11. Repeatability: the instrument continuously measures 24 hours, and the detection efficiency changes alpha < 2% and beta < 3%;
12. Crosstalk ratio: alpha entered beta with a ratio of < 1% (to 239Pu),
13. Crosstalk ratio: the count of beta entering the alpha channel is less than < 0.3% (for 90sr-90y);
14. Pressure insulation degree > 1500V;
15, insulation resistance or 2 m Ω;
16. Instrument sensitivity: alpha: 1.6 x 10-2bq; Beta: 2.8 x 10-2 bq
17. Measurement method: the alpha beta can be measured at the same time, and alpha or beta can be measured separately; The measurement process and measurement results can be displayed on the monitor and can be printed. The measurement time, the alpha threshold of the detector, the beta low threshold (beta L), the beta high threshold (beta H), and the high pressure can be adjusted by computer according to the requirements.
18. Working conditions
1) power supply voltage: ac 220V plus or minus 10%; 50 hz.
2) ambient temperature: 5 ~ 400C plus or minus 20C;
3) relative humidity: < 90% (+ 300C).
19. The machine cabinet and the computer are designed with separate design (the computer is placed on the experimental table to operate the instrument).
20. The instrument must be fitted with two anti-coincidence scintillator detectors to effectively reduce the base.
