You may experience temperature drift in an electronic strain gauge electronic balance. That is, due to the change in temperature, the indication of the balance at the time of initial loading and the indication after a period of time are inconsistent. The causes of temperature drift are various factors such as the temperature and humidity changes of the use environment, the length of the warm-up time, the sensitivity of the internal sensors and electrical components of the balance to the temperature and humidity (ie, the temperature drift coefficient). The higher the accuracy of the balance, the more obvious this phenomenon is.

The following experiment was done: Against this phenomenon.

Experiment 1 The effect of preheating time on the indication of the balance.

Temperature 16 ° C, precision analytical balance. There is a constant temperature device, loading 200gF2 standard weight. indoor

Boot after 2 hours of storage:

Time indication (g data disposal (g

9:00199.96/

9:05200.02+0.06

9:15200.06+0.10

9:35200.07+0.11

Show 0.10g to uninstall at this time.

The indication value of the balance gradually became stable; it was also proved that although the indication value at the initial loading was inconsistent with the indication after a period of time, the change in the 10 minutes after the change of 0.06g in the first 5 minutes was 0.04g from 9:159:3520 minutes. A change of 0.01 g is thus evidenced by an increase in the warm-up time. However, as long as the indication before unloading is subtracted from the value after unloading, an accurate reading of the load can still be obtained.

Experiment 2 The effect of temperature difference on the value of the electronic balance.

The outdoor temperature is 2 ° C and the test tool is the same as above. Move the electronic balance from the outside to the inside. The indoor temperature is 18 ° C, the humidity is 63% RH, that is, the temperature difference is 16 ° C, and there is a constant temperature device. Turn it on immediately and measure the data as follows:

Time indication (g data disposal (g

14:25200.00/

14:28200.44+0.44

Display 0.45g+0.4 Uninstall now. 5

Reload without peeling.

15:30200.70+0.70

15:59200.76+0.76

Show 0.76g+0.7 Uninstall now. 6

Load after zeroing

16:00200.000.00

16:20200.000.00

Due to the large temperature difference, when the electronic balance has just moved from the outside to the inside. The value of the electronic balance changed greatly. After the first 3 minutes, it changed to 0.44g and changed to 0.70g after 65 minutes. After 62 minutes, it changed to 0.26g. From 15:3015:59, it changed to 0.06g for nearly half an hour.

The change in the value of the electronic balance is also greater. 1. The greater the temperature difference. As time passed, the internal temperature gradually approached room temperature, and the electronic balance showed a steady state.

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