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th0360 high-precision calibrator for dc resistance meters 可精确模拟宽范围直流标准电阻
阻值范围： 0.1 μω ～ 1.1 gω
具有 2 线 / 4 线电阻模式
最佳准确度达 0.002 级
overview
model th0360, an intelligent calibrator that can accurately simulate a wide range of dc standard resistance. the measuring range is from 0.1 μω to 1.1 gω by 2-wire ohms or 4-wire ohms resistance, the optimal accuracy is up to class 0.002.
applied to calibrate wheatstone bridges, double bridges and broadband dc resistance meters. current measuring range is from 10 ma to 33 a, automatically switch on all ranges, measuring accuracy is up to ±0.0025 % which is much better than 8½ digital multimeters.
reference standards
● jjg 124-2005 verification regulation of amperemeters, voltmeters, wattmeters and ohmmeters
● jjg 166-1993 verification regulation of d.c. resistors
● jjg 837-2003 verification regulation of d.c. low resistance meters
applications
● calibrate single bridges (wheatstone bridges) and double bridges (classes 0.005 and below). e.g., qj36, qj32, qj23, qj19 and qj18.
● calibrate dc ohmmeters (classes 0.005 and below). e.g., rm3545 and rm3544.
● calibrate the resistance measurement function of 6½ digital multimeters. e.g., agilent34401a, keithley2100 and fluke8845a.
● calibrate dc current sources (classes 0.005 and below). e.g., td1850, td1860 and td1500.
● calibrate temperature measuring bridges (classes 0.005 and below)
features
● full digital adjustment and programming interface, the resolution is as low as 0.01 nω which is greatly better than physical resistors.
● compared with the traditional physical standard resistance box, there is no error effect caused by the residual resistance and contact resistance from bandswitch, avoids resistance change caused by overload.
● wide current measuring range is from 10 ma to 33 a, the optimal accuracy is up to ±0.0025 %, and fully-automatically switches on all ranges, strong capability of current overload, esd function and high reliability, can be used as a best dc ammeter.
● hd lcd touch screen make intuitive display and convenient operation.
● connect the apparatus to a computer via rs-232 interface, easy to build computer automatic test system.
electrical specifications
dc current
measurement characteristics
● range switching: automatic or manual.
● measuring range: 10 ma to 33 a
● display: 8 digits
● warm-up time: 30 minutes
4-wire low resistance (r1)
equivalent resistance characteristics
● resistance range: 0.100 00 μω to 100.000 ω
● display: 6 digits
2-wire and 4-wire resistance (r2)
equivalent resistance characteristics
● resistance range: 10 % to 110 % on all ranges.
● display: 6 digits
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