th0350 calibrator for dc bridges -凯发k8国际

overview

model th0350, an intelligent calibrator that accurately simulates a wide range of dc standard resistors.

low resistance range is from 100 μω to 111 ω, the corresponding current input range is from  1 ma to 11 a. medium and high resistance range is from 10 ω to 11 mω, the corresponding current input range is from 0.25 μa to 80 ma. all ranges are fully automatic switching, and the optimal accuracy is up to ±50 ppm.

applied to calibrate wheatstone bridges, double bridges, digital electric bridges, digital microhmmeters and dc resistance meters.

reference standards

● jjg 125-2004 verification regulation of d.c. bridges

● jjg 837-2003 verification regulation of d.c. low resistance meters

applications

● calibrate wheatstone bridges (classes 0.02 and below)

● calibrate double bridges (classes 0.02 and below)

● calibrate dc resistance meters (classes 0.02 and below)

● calibrate temperature measuring bridges (classes 0.02 and below)

features

● full digital adjustment and interface programming, the resolution is as low as 5 nω, the self-calibration function ensures the accuracy and stability of values for a long time.

● compared with the traditional physical standard resistance box, the resolution of model th0350 is higher with a typical value 0.1 mω. no error effect caused by residual resistance (the typical value is mω level) and contact resistance from transfer switch, avoid resistance change caused by overload.

● maximum current is up to 11 a, fully-automatically switches on all ranges, strong capability of withstanding current impulse to avoid resistance change caused by current overload.

● fully testing of esd and emc to ensure high reliability.

● hd lcd touch screen make intuitive display and convenient operation.

● connect the instrument to a computer via rs-232 interface, easy to build computer automatic test system.

electrical specifications

4-wire low resistance

equivalent resistance characteristics

● current input range: 1 ma to 11 a. overload of range brings additional resistance error.

● range switching: automatic or manual.

● measurement mode: 4-wire

● current measurement function

● operating environment: 23 °c ±1 °c, r·h from 40 % to 60 %, warm up for 1 hour.

medium and high resistance

equivalent resistance characteristics

● resistance range: 10 % to 110 % on all ranges. 

● measurement mode: 4-wire or 2-wire

● current measurement function

● operating environment: 23 °c ±1 °c, r·h from 40 % to 60 %, warm up for 1 hour.

general specifications

● line power: 220 v ±22 v, 50 hz ±2 hz

● operating environment: +18 °c to +28 °c, r·h from 40 % to 65 %, non-condensing

● storage environment: +5 °c to +40 °c, r·h <85 %, non-condensing

● communication: rs-232 interface