JJG 1036-2008Verification Regulation for Electronic Balance (English PDF)

3.1 Terms

3.1.1 Zero-setting device. It refers to the device which sets the indication value

to zero when there is no load on the scale pan.

3.1.2 Zero-tracking device. It refers to the device which automatically maintain

the zero indication value within a certain limit.

3.1.3 Tare device. It refers to the device which sets the indication value to zero when there is load on the scale pan.

3.1.4 Multiple range. There are two or more weighing ranges, which have different maximum capacity and different actual intervals, AND each weighing range can be from zero to the corresponding maximum capacity.

3.1.5 Multi-interval. There is only one weighing range, which is divided into several local weighing ranges in accordance with different actual intervals. The local weighing range is automatically determined based on the increase or decrease in the load applied.

3.1.6 Maximum capacity. It refers to the maximum weighing capacity excluding

the added tare weight.

3.1.7 Minimum capacity. It refers to the load value below which an excessive

relative error may be caused.

3.1.8 Weighing range. It refers to the range between the minimum capacity

and the maximum capacity.

3.2 Units of measurement

The units of measurement are kilograms (kg), grams (g), milligrams (mg), micrograms (µg), and tons (t).

5.1 Actual interval value (d)

It refers to the difference between the two adjacent indication values.

5.2 Verification interval value (e)

It refers to the value which is used for balance grade division and metrological verification AND expressed in mass unit. The verification interval value e is selected by the manufacturer in accordance with the requirements of Table 1.

5.2.1 Verification interval value e may be in the form as followings.

1 × 10k OR 2 × 10k OR 5 × 10k

Wherein k is a positive integer, a negative integer or zero.

5.2.2 Verification interval value e is defined by.

d <= e <= 10d

In general, the verification interval value e shall also be subject to e = 10k kg, where k is a positive integer, a negative integer or zero.

5.3 Verification interval number (n)

The ratio of the maximum capacity to the verification interval value, n = Max/e.

f) Marking of the certificate for measurement instrument manufacture;

g) Maximum capacity. expressed as Max;

h) Minimum capacity. expressed as Min;

i) Actual interval value. d;

j) Verification interval value. e;

k) Exit-factory number;

l) Exit-factory date (or given in some form).

6.1.1.2 Necessary markings at the appropriate time

a) Power supply voltage... V;

b) Power frequency... Hz;

c) As for the balance which is composed by several independent but mutually related modules, each module shall have identification marking;

d) Special temperature limits when complying with normal working requirements.

6.1.2 Requirements for marking

6.1.2.1 Handwriting size and shape must be clear and standardized;

6.1.2.2 Signage with illustrative markings must be firm and reliable, AND it must be difficult to rub, destroy or disassemble;

6.1.2.3 Signs shall be installed (placed) in a clearly readable position on the balance.

6.2 General requirements of structure

6.2.1 Applicability

6.2.1.1 The design of the balance shall be suitable for the intended use.

6.2.1.2 The structure of the balance shall be fine and strong, AND to maintain good measurement performance in its service period;

6.2.1.3 It shall be able to place the load easily and safely on the weighing pan of the balance. As for the balance equipped with the hanging pans, it must ensure that the hanging system is firm and reliable, AND it shall not produce slippage.

6.2.2 Reliability

6.2.4.3 The balance may be provided with an interface to connect it to an external device. The measurement function and measurement data of the balance shall not be affected by the peripheral equipment, other receiving instruments, OR the interface acting on the interface.

6.2.4.4 Under the normal use conditions, the balance shall have good pressure resistance and insulation performance.

6.3 Indication of weighing results

6.3.1 Reading device

6.3.1.1 Under normal conditions of use, the reading of the weighing results

must be accurate, reliable and clear.

6.3.1.2 When the maximum capacity + 9e is exceeded, the balance shall have no numerical indication, OR otherwise indicate the overload overflow symbol.

6.3.2 Indication form

6.3.2.1 Weighing results must contain the units of measurement of mass or other symbols;

6.3.2.2 For the indication of any one of the weighing results, only one unit of measurement as selected shall be used;

6.3.2.3 When there is more than one indicating device on the balance, the indication of each indicating device must be consistent when me...

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