ZX21 电阻变化范围
（0~9）*（0.1+1+10+100+1000+10000）
额定功率：0.25W
外形尺寸：185*130*115
ⅠUses:
The ZX21 rotary resistance box which has low zero resistance ,is used to adjust resistance in DC circuit. This equipment is commonly used in laboratories for schools, factories and scientific research units. The temperature of the air around should be +10℃~+35℃and the relative humidity 30~80% when it is used .
ⅡThe main technical parameters
Table 1 The main technical parameters
IndicationΩ
Types | × 100M | × 10M | × 1M | × 100k | × 10k | × 1k | × 100 | × 10 | × 1 | × 0.1 | × 0.01 |
ZX21 | — | — | — | — | 0.1 | 0.1 | 0.5 | 1 | 2 | 5 | — |
ZX21a | — | — | — | — | 0.1 | 0.1 | 0.1 | 0.5 | 1 | 2 | — |
2X21b | — | — | — | — | 0.1 | 0.1 | 0.1 | 0.5 | 1 | 2 | — |
ZX21c | — | — | — | — | — | 0.1 | 0.1 | 0.5 | 1 | 2 | 5 |
ZX21d | — | — | — | 0.5 | 0.1 | 0.1 | 0.5 | 1 | 2 | — | — |
ZX21e | — | — | 1 | 0.5 | 0.1 | 0.1 | 0.5 | 1 | — | — | — |
ZX21f | — | 2 | 1 | 0.5 | 0.1 | 0.1 | 0.5 |
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ZX21g | 5 | 2 | 1 | 0.5 | 0.1 | 0.1 |
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Current≤（A） | 60 μ | 180 μ | 0.6 m | 1.8 m | 6 m | 18 m | 60 m | 180 m | 0.6 | 1.5 | 3 |
- Adjusting range
ZX21：(0~9）×（0.1~10k）Ω＝0~99.9999 kΩ
ZX21a:（0~10）×（0.1~10k）Ω＝0~111.1110 kΩ
ZX21b：（0~9）×（0.1~10k）Ω＝0~99.9999 kΩ
ZX21c：（0~10）×（0.01~1k）Ω＝0~11.11110 kΩ
ZX21d：（0~10）×（1~100k）Ω＝0~1.111110MΩ
ZX21e：（0~10）×（10~1M）Ω ＝0~11.11110MΩ
ZX21f：（0~10）×（100~10M）Ω＝0~111.1110MΩ
ZX21g：（0~10）×（1k~100M）Ω＝0~1.111110GΩ
- Zero resistance:（30±5）mΩ
- The basic errors are regulated in Table 1.
- The allowable current of each group resistance are shown in Table 1
- The dielectric strength between resistance box circuit and shell can withstand 50 Hz frequency,2000V AC, which lasts 1 minute.
- The insulation resistance between resistance box circuit and shell is not less than 1000MΩ
- The weight of the resistance box is about1.3 kg,
and its size is 200×150×110mm3.
ⅢPoints for attention
- Please rotate each button first when you use the resistance box to confirm the contacting of the internal resistance is stability and reliability.
- The current in the resistance box should not be more than the largest allowed current.
- Please connect the wire with “0”and another small indication terminal when needing low resistance
- The resistance should be placed in shadowing room. The temperature of the air should be +10℃~40℃, the relative humidity less than 80%,and there is no harmful impurities which can cause corrosion.
ⅣSupplementary provisions
- Excepting the product we also supply files including :
(1) Packing list
(2) Theoperating instructionof the product
(3) The qualified certificate of the product.
- This resistance box is produced according to the ZBY162—83 in China standard.
- The period of guarantee of the resistance box is 12 months from date load.
