BR12 type Barograph

 USAGE

BR12 type Barograph is used to record continuously the atmospheric pressure within a certain period by meteorological office and other relevant departments.

 SUMMARY

1. Record type:

♦ Daily type——drum rotation 24 hours.

♦ Weekly type——drum rotation 7 days.

♦ Daily and weekly type—-daily and weekly can be switched. If weekly record, the time button on the base should be pressed on “7”; if daily record, the time button on the base should be pressed on “1”.

2. The barograph is manufactured with the elements that a set of aneroid capsule shrinks as the atmospheric pressure changes. It includes the following:

♦ Sensing element is made with a set of aneroid capsule.

♦ Drive mechanism includes lever and pull bar.

♦ Record: pen with nib an recording drum.

3. Drum rotation rotates with a clocking mechanism.

4. Chart graduation: horizontal scale is pressure value, and curve is time value.

5. When replacing the chart, strike out the gear lever, which makes the nib out of the chart.

6. To turn the rotary switch can put the nib on required pressure value of the chart.

 TECHNICAL SPECIFICATION

1. Measuring range: atmospheric pressure 960hpa ~1060hpa , under circumstance temperature -10 ~ +40C;                

2. Temperature coefficient of atmospheric pressure: not more than +/-0.13hpa/1℃;

3. When corrected value of 1010hpa is 0.0, the corrected value of Barograph’s two points (960hpa and 1050hpa) no more than 1.5hpa;

4. Allowable deviation of recording time: Daily type ≤±5min; Weekly type ≤±30min.

 A COMPLETE SET  

♦ BR12 barograph         1set

♦ Spare pen nib               2pcs

♦ Special ink               1bottle

♦ Special chart: Daily type 400pcs; Weekly type 60pcs.

♦ Certificate               1pc

♦ Manual                   1pc

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