Shanghai Rotating Resistance Box*

1Shanghai Rotating Resistance Box*purpose

The ZX35 DC resistance box is used for precision adjustment of resistors in DC circuits or as a standard measuring tool for verifying resistance thermometers. It is suitable for measurement and other DC circuit experiments in factories, schools, and research institutions.

IIShanghai Rotating Resistance Box*Main technical indicators

1. When all three read-only disks are at zero position, the measured resistance value is (30 ± 5) m Ω.
2. The maximum small step value is 1 Ω.
3. Resistance box adjustment range: 0-1110 Ω.
4. The reference temperature and nominal temperature range of the resistance box shall comply with the following regulations:
Parameter range: 20 ± 0.5 ℃
Nominal range: 20 ± 5 ℃
5. The reference relative humidity and nominal relative humidity range of the resistance box should comply with the following regulations:
Reference range: 40% to 60%
Nominal range: 25% to 75%
6. The reference power and nominal power of the resistance box are specified in Table 1:
Ten inch disk Ω× 100 × 10 × 1
Reference power 0.05W0.05W0.005W
Nominal power 0.1W0.1W0.01W
7. Under reference conditions of temperature, relative humidity, and power, the accuracy of each ten inch reading dial should meet the requirements of Table 2:
+Table 2
Ten inch disk Ω× 100 × 10 × 1
Accuracy% ± 0.1 ± 0.1 ± 0.5

Supplementary Provisions

1. Under the condition that the user complies with the usage rules for storage, if there are any quality problems with the resistor or if it cannot be used normally within one year from the date of delivery inspection, we will repair and handle it for the user free of charge.

Users need to bear their own responsibility: If the user accidentally connects the wrong wires without knowing how to use it for the first time and causes the resistor and switch to burn out, we will calculate the cost price, shipping fee, and salary repair fee, which are the expenses that the user should bear themselves. We will repair it according to the burnt condition and return it to the user.

2. The product comes with one instruction manual, one product certificate, and one packing list.