One: A few technologies with medium JJG-539-97 of regulations of weighing apparatus calibrating ask.

1: Accuracy grade: The accuracy cent of weighing apparatus is 2 class. Specific following watches:

In accuracy

Ⅲ

Common accuracy

Ⅳ

2: Calibrating scale division value:

The calibrating scale division value of weighing apparatus and actual (show) scale division value is equal

Namely: E (calibrating scale division value) =d (indication scale division value)

3: The grade of the balance:

The relation of number of graduation of the calibrating scale division value that concerns with accuracy grade, calibrating and the smallest metage sees next tables:

Accuracy grade

Calibrating scale division value

E

Calibrating divides degree: N=Max/e

The smallest metage

Min

The smallest *

The biggest

In (Ⅲ )

0.1g≤e≤2g

5g≤e

100

500

10000

10000

20e

20e

Common (Ⅳ )

5g≤e

100

1000

10e

Note: *: Rotten to shirk gallops the astounded that catch sprain 〖 of wetting plutonium of some cherry at ǚ brother's son ” of Ⅲ of?rdquo; of benevolence , n=1000; To ” Ⅳ ” , n=400

4: Of the balance the biggest allow an error: See next tables

The biggest allow an error

MpeM expresses with E of calibrating scale division value

Ⅲ

Ⅳ

±0.5e

0≤m≤500

0≤m≤50

±1e

500 ＜ M≤2000

50 ＜ M≤200

±1.5e

2000 ＜ M≤10000

200 ＜ M≤1000

2: From above a few technologies ask to be able to get a verdict: Of weighing apparatus actual (show) scale division value and calibrating scale division value are equal. But as software technology rise, the weighing apparatus with unequal both often can appear on the market at present, namely E≠d. The person that make use thereby is promiscuous use, how will understand correctly: = of scale division value of calibrating of the “ in commonly used weighing apparatus is the at present biggest metage / 3000” (E=Max/3000) , namely calibrating graduation number is 3000. But it is OK to show minute of degree is highest now on the market accomplish 60000 (have 5000 commonly, 6000, 7500, 10000, 15000, 20000, 30000) . Make clear on the nameplate of weighing apparatus only: “e=d” this is calibrating graduation number shows graduation is counted namely otherwise.

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