The type of DL08-25a

Switch-mode DC Standard Resistor Box

Manual

First. Resistance box structure.

Resistance box is the value of variable resistor measuring resistance, the resistance value can be known by the scope of the ladder must be changed.

Standard switch-mode DC resistance of the resistor box to the various components are then contact between the rotating ａnd fixed in a frame in contact with brush contacts on the mobile.

Box in which resistor is being used between the initial contact resistance is the use of brush ａnd touched by the resistance between contacts.

Second.use

1, for the DC circuit for precision resistance adjustment purposes.

2, machine resistance check box under the one-thousandth.

3, the use of machine precision resistance box to check a single DC power portable bridges.

Third, the main technical indicators of resistance box

1, measuring range :0.01 －－－－- 11111 .1 ohms
2, in compliance with the following conditions of use, the resistance will not exceed the error box in Table 1 to allow the basic error.

   ⑴, ambient air temperature of 20 - ± 3℃, relative humidity of 80% or less;
⑵, current to direct current;
⑶, power does not exceed the rating.

3, the basic error of resistance box as shown in table 1 provides that:

4, resistance box between the internal circuits ａnd the shell of the insulation resistance should be not less than 1000 megohm test voltage of 500 volts
5. Resistor box line ａnd the insulation between shell strength, must be able to withstand a frequency of 50 weeks, the actual volt AC sine wave of the role in 2000, Lee at one minute.
6, resistance box between the block should not exceed the maximum allowable current provisions of Table 2

7, Overall dimensions to 340X165X148 mm ａnd weighing about 4 kg

Fourth, the structural characteristics of resistance box

Bearing resistance box with a potential client can lead to component test, switch contact ring ａnd brush contact films are used between the micro-spring-pressed, so the long-term use, the contact resistance variation of small, bearing a high insulation Feng poly plastic materials, insulation, ａnd panel show the value of reading can be arranged in two linear time simple ａnd clear to show the value of switch resistance on me all the time zero, zero-resistance of 0.01 ohm. Therefore, the smallest non-zero switching step, starting at 1, in the course of the measurement results do not have to deduct zero resistance. High-stability resistor elements manganese to copper alloy wire system without a sense of style around the ceramic tube ａnd a rigorous process ａnd therefore have a high stability. DL08-56-type resistance box wide for schools, factories ａnd scientific research units for power measurement ａnd other experimental purposes.

V, storage use ａnd ensure that deadlines

1, the proper use of resistance box should be the first rotary knob about the groups, the use of stable ａnd reliable contact.
2, resistance boxes in the course of tablets should be regular cleaning brush, cleaning cotton fist used in gasoline in contact with the surface of Central Wipe after lightly coated with a layer of evenly Vaseline can be neutral.
3, where the use ａnd storage temperature should be +10℃－－－－-+ 30℃, relative humidity should not fight in 8% ambient air should not contain corrosive gas.
4, resistor box from the factory to ensure that deadline date foreighteen hours.

Sixth. together with the supply of paper products are

1, packing list
2, product certification
3, Product Manual

Shanghai DomoreElectronic Science ａnd Technology Co., Ltd.

Address: Number128，Jinjia Dun，fuyang，Hangzhou,Zhejiang Province.

DL08-25a检测报告

检测温度20      湿度60%         零电阻0.00998Ω

编号 20140115