2017.11.7
(JIS B 7505 quoted partially)
Scale of a pressure gauge is defined by followings.
Maximum scale of pressure part at pressure and compound gauges are specified by 1.0×10n，1.6×10n，2.5×10n，4.0×10n，6.0×10n
while that of vacuum-producing part at vacuum and compound gauges is -1.0×10n. (where, n: positive or negative integer, or zero)
Scale interval of a pressure gauge is specified by 1×10n，2×10n，5×10n
(where, n: positive or negative integer, or zero) and its value stays close to tolerance and does not exceed 2-fold of it.
※Minimum scale value per device is calculated by the formula of "Maximum scale is divided by division number as shown in the following Table.
The number per device as shown in the following Table is specified by maximum scale, 1 above, scale interval, 2 also above, and accuracy class.
| Device | Max. Scale (Mpa or kPa) |
Accuracy Class | ||||
|---|---|---|---|---|---|---|
| 0.6 | 1.0 | 1.6 | 2.5 | 4.0 | ||
| Pressure Gauge | 1 x 10n | 100 | 50 | 50 | 20 | 20 |
| 1.6 x 10n | 160 | 80 | 32 | 32 | 16 | |
| 2.5 x 10n | 125 | 50 | 50 | 25 | 25 | |
| 4 x 10n | 200 | 80 | 40 | 20 | 20 | |
| 6 x 10n | 120 | 60 | 60 | 30 | 30 | |
| Vacuum Gauge | -0.1 ～ 0 | 100 | 50 | 50 | 20 | 20 |
| Compound Gauge | -0.1 ～ 0.1 | 100 | 100 | 40 | 20 | 20 |
| -0.1 ～ 0.16 | 130 | 52 | 52 | 26 | 26 | |
| -0.1 ～ 0.25 | 175 | 70 | 35 | 35 | 35 | |
| -0.1 ～ 0.4 | 100 | 50 | 50 | 25 | 25 | |
| -0.1 ～ 0.6 | 140 | 70 | 35 | 35 | 14 | |
| -0.1 ～ 1 | 110 | 55 | 55 | 22 | 22 | |
| -0.1 ～ 1.6 | 85 | 85 | 34 | 34 | 17 | |
| -0.1 ～ 2.5 | 130 | 52 | 52 | 26 | 26 | |
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