Update ZX21 Variable Decade Resistor Resistance Box DC Resistance Box 0~99.9999 kΩ

Description

Description: ZX21 series rotary resistance box for the DC circuit for use adjustable resistance, has a lower value of zero resistance, are all the most commonly used laboratory instruments for schools, factories and research units for electrical measurements and other experiments. ZX21 series rotary resistance box is suitable for ambient air temperature + 10 ℃ ~ + 35 ℃ and relative humidity when using 30 to 80% Note: 1.When the proper use of resistance box to rotate the knob in each group, so that the contact resistance is stable and reliable. 2. The maximum allowable current value of the resistance box in use should never exceed the specified. 3. When only a small change in resistance, then wire to the "0" and another small indication terminal, can reduce the resistance inside the lead resistance. 4.The resistance box should be placed in shelter room, the air temperature from + 10 ℃ ~ 40 ℃ relative humidity below 80% should not contain harmful impurities can cause corrosion.