Precision DC resistance box

Precision DCresistance boxwidely used inFactories, schoolsIn multiple fields such as thermal engineering, scientific research, etcElectrical measurement and experimentationIn the middle.Current usageofPrecision DCresistance boxMost of them are manual, itConnect dozens of precision resistors and use multi position rotary switches to select the desired resistance value for the circuitThe precision DC resistance box is manually adjusted by multiple knobs during use, which is cumbersome, inefficient, and cannot obtain continuously changing resistance values, greatly limiting its application.

The ZX71A developed by our companyPrecision DC resistance boxIt is a replacement product of the old-fashioned resistor box. ZX71APrecision DC resistance boxUsing a microprocessorControl multiple relays instead of the multi position rotary switch mentioned aboveSwitching multiple resistorsimplementResistance adjustmentThe high-precision resistor output device adopts precision resistors with small time constants and high stability, as well as shielding compensation measures. It has the advantages of good frequency characteristics, high stability, and reliable performance.The ZX71A program-controlled precision DC resistance box has a high degree of automation and efficiency, overcoming the drawbacks of manual adjustment operation, and the obtained resistance value can be continuously adjusted in steps.

ZX71AThe programmable precision DC resistance box has a thermal resistance temperature sensor simulation function, which simulates the "T-R" characteristics of various standard temperature sensors such as RTD and NTC. It can be widely used for debugging and calibration of various temperature detection, acquisition, and display devices.

ZX71AThe process control function of the programmable precision DC resistance box canimplementResistance or temperature according toChanges to the reservation program,Simulate the dynamic changes in resistance or temperature, which can be used forAutomatic testing based on standard resistance source in electronic product automation production line, andDynamic circuit parameter debugging in the development process of electronic products.

■ Product features

Using low-temperature drift precision resistors with good temperature stability

Adopting imported sealed low contact resistance DC relay with long service life and ensuring long-term stability

The range of resistance adjustment is 0.1 Ω to 999999.9 Ω

The highest accuracy can reach±0.1%

10 sets of commonly used resistance values and 10 sets of temperature value memory units, which can be quickly stored and retrieved

300 step process control, programmable to adjust simulated temperature or resistance values

OLED screen, noble and atmospheric, detailed numerical and status display

Quick setting with buttons, allowing direct input of resistance or temperature values

Adjustable knob, resistance or simulated temperature values can be continuously displayed

Can simulate the temperature characteristics of various specifications of RTD and NTC type thermistors

Equipped with RS232 interface, it enables real-time acquisition and adjustment of parameters, as well as automatic program control

Equipped with external adjustment and control interfaces

■ Product application

Factories, schoolsThermal engineering, scientific researchwaitMultiple fieldsElectrical measurement and experimentation

Static and dynamic circuit parameter debugging in the development process of electronic products

Simulate various types of thermal resistance temperature sensors, calibrate and debug thermal resistance temperature acquisition and conversion devices

Simulated resistance strain (i.e. weighing sensor), debugging of weighing signal acquisition device

Automatic testing based on standard resistance source in electronic product automation production line

■ Technical indicators