- Resistance from 1 mΩ to 111 MΩ
- Available in double-power version: HARS-X2
- Wide choice: single through 11 decade units
- High accuracy - 0.01% (100 ppm)
- HARS-X: ±(0.01% + 2 mΩ)
- HARS-B: ±(0.1% + 4 mΩ)
- Very low zero-resistance: <1 mΩ per decade for HARS-X
- High-performance solid silver-alloy contacts
- Low temperature coefficient: - 5 ppm/°C
- Non-inductive or low-inductance resistors
- Rack mounting available
The HARS Series is the best choice when you need a laboratory grade, tight tolerance, high performance resistance decade box that is also cost effective.
The High-Accuracy Resistance Substituter (HARS) resistance decade box is a family of instruments providing a very broad choice of high performance resistance sources. With a resolution as low as 1 mΩ and a maximum available resistance of over 111 MΩ, the HARS series resistance decade boxes may be used for exacting precision measurement applications requiring high accuracy, good stability, and low zero-resistance. Any number of decades from one to eleven is available in a choice of accuracies.
The HARS resistance decade box is a precision resistance source with excellent characteristics of stability, temperature coefficient, power coefficient, and frequency response. The HARS Series employs very-low-resistance switches with silver alloy contacts. A special design keeps zero resistance to less than 1 mΩ per decade for the HARS-X. Self cleaning keeps the silver contacts from becoming tarnished when unused, or when only low currents are passed through them. This is most often the case when only minute test currents are drawn by digital multimeters or other test instruments. Contact resistance is stable and remains low and repeatable.
The HARS resistance decade boxes have high-quality gold-plated tellurium-copper binding posts serve to minimize the thermal emf effects which would artificially reflect a change in dc resistance measurements. All other conductors within the resistance decade box, as well as the solder employed, contain no metals or junctions that could contribute to thermal emf problems.
HARS Resistance Decade Box Applications
- *Can be used as components of dc and ac bridges
- *Excellent choice as a resistance calibration or transfer standard
- *As a precision RTD simulator.
- *The HARS Series decade box may be rack-mounted to serve as components in measurement and control systems
HARS-X系列电阻十年盒基本规格 （完整规格可在数据表中找到）
精度 ：≤1MΩ步长：±（0.01％+2mΩ）10MΩ步长：减去零电阻后的±0.03％，温度为23°C;可追溯到SI
零电阻 ：直流时每十亿<1mΩ，≤1MΩ十年：10MΩ十进制：直流时≈3mΩ
最大电压： 2000 V峰值开关：
连续旋转11个位置标记为“0” - “10”多个固体银合金触点
每步阻力 | 总十年阻力 | 稳定性（±ppm /年） | 长期稳定性（±ppm / 3年） | 温度系数（±ppm /°C） | 电阻器类型 | 哈斯-X | 哈斯-X2 | ||||
最大电流 | 最大电压（每步） | 最大功率（每步） | 最大电流 | 最大电压（每步） | 最大功率（每步） | ||||||
1mΩ | 10mΩ | 50 | 75 | 50 | 电阻丝 | 8 A. | 5 mV | 0.04瓦 | 9：甲 | 9毫伏 | 0.08瓦 |
10mΩ | 100mΩ | 50 | 75 | 20 | 4 A. | 40 mV | 0.16瓦 | 6.3 A | 63 mV | 0.4瓦 | |
100mΩ | 1Ω | 50 | 75 | 20 | 1.6 A. | 0.16 V | 0.25 W | 2.2 A. | 0.3 V | 0.5瓦 | |
1Ω | 10Ω | 20 | 25 | 20 | 线绕，无感 | 0.8 A | 0.8 V | 0.6 W | 1.1 A. | 1.1 V | 1.2 W |
10Ω | 100Ω | 20 | 25 | 15 | 0.25 A | 2.5 V | 0.6 W | 0.35 A. | 3.5 V | 1.2 W | |
100Ω | 1kΩ | 20 | 25 | 五 | 80毫安 | 8 V | 0.6 W | 110毫安 | 11 V | 1.2 W | |
1kΩ | 10kΩ | 20 | 25 | 五 | 23毫安 | 23 V | 0.5瓦 | 35毫安 | 35 V | 1.2 W | |
10kΩ | 100kΩ | 20 | 25 | 五 | 7毫安 | 70 V | 0.5瓦 | 11毫安 | 110伏 | 1.2 W | |
100kΩ | 1MΩ | 20 | 25 | 五 | 2.3毫安* | 230 V * | 0.5 W * | 3毫安* | 500 V * | 1 W * | |
1MΩ | 10MΩ | 20 | 25 | 五 | 0.7毫安* | 700 V * | 0.5 W * | 1毫安* | 1000 V * | 1 W * | |
10MΩ | 100MΩ | 50 | 100 | 10 | 金属氧化膜 | 0.1 mA * | 1000 V * | 0.1 W * | 0.1 mA * | 1000 V * | 0.1 W * |
| *最大2000 V以下。 | |||||||||||
