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td1503 dc current standard 高精度的直流电流标准源，可用于校准 7 位半以下数字多用表的直流电流
最佳准确度达 0.005 级 ( 全球同类仪器的准确度低于 0.015% )
电流输出范围： 1 ma ～ 1.1 a 或 3.3 a
overview
model td1503, a high-precision dc current standard, can accurately outputs dc current from 1 ma to 3.3 a (or 1.1 a) with an accuracy of class 0.005 (the accuracy of similar instruments over the world is less than ±0.015 %).
the apparatus has a wide range of applications. in the field of magnetic measurement, applied to provide high stability and accuracy excitation current for helmholtz coils or standard magnetic coils to produce a uniform and stable static magnetic field for calibrating magnetic sensors and measuring instruments.
in the field of electrical measurement, applied to calibrate the dc current of 7½ digital multimeters or other high-class dc ammeters. combine with high-precision digital multimeters to measure current sensors, force sensors, standard dc resistors, high performance led, etc.
features
● optional output polarity mode: reversing relay and bipolar circuit.
● much lower noise, much higher precision, resolution and reliability.
● fast adjustment method: fixed-point output, rotary encoder adjustment and programmed output.
● protection: open-circuit protection, overload protection and overheating protection.
● display: large lcd touch screen, more intuitive of value display and easier operation.
● connection: easy to build fully-automatic test system via rs-232 interface.
electrical specifications
dc current (td1503-1x)
output characteristics
● output range of current: 1 ma to 1.1 a
● output zero position: < 0.01% of range.
● resolution: 0.0005 % of range
● display: 7 digits
● ripple coefficient: <0.02 % of range @ 0.1 hz to 10 khz, rms.
● protection: open-circuit protection, overload protection and overheating protection.
dc current (td1503-2x)
output characteristics
● output range of current: 1 ma to 3.3 a
● output zero position: < 0.01% of range.
● resolution: 0.0005 % of range
● display: 8 digits
● ripple coefficient: <0.02 % of range @ 0.1 hz to 10 khz, rms.
● protection: open-circuit protection, overload protection and overheating protection.
general specifications
● line power: 220 v ±22 v, 50 hz ±2 hz
● operating environment: +15 °c to +35 °c, 20 % to 85 % r·h, non-condensing
● storage environment: 0 °c to +40 °c, <95 % r·h, non-condensing
● test condition: 1 hour warm-up, sampling rate is 1 sps.
● communication: rs-232 interface (programmed output is supported.)
selection guide
