6485皮安表Keithley吉时利(安培计)
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产品详情
5½位6485型皮安表是高性价比小电流测试仪器,测量20fA到20mA的电流,每秒最快1000个读数的速度进行测量。它具有的10fA的分辨率与高灵敏度,特别适合于低电流测试场合,而它20mA的量程使它可以测量较高的电流,如测量4-20mA的传感器电流。6485采用反馈式皮安表,但它仍比类似功能的其它仪表便宜得多,比如光功率计。 产品特点 技术参数 其他 5½位6485型皮安表是高性价比小电流测试仪器,可以测量20fA到20mA的电流,按照每秒最快1000个读数的速度进行测量。它具有的10fA的分辨率与高灵敏度,使它特别适合于低电流测试场合,而它20mA的量程使它可以测量较高的电流,如测量4-20mA的传感器电流。尽管6485使用了最新的电流测量技术,但它仍比类似功能的其它仪表便宜得多,比如光功率计,其它的皮安表或用户自制的系统。 6485的价格相当于通用的数字表,用它进行皮安级的电流测量,任何实验室或生产车间都可以负担得起。数字表一般使用分流电流表电路来测量电流,而6485采用反馈式皮安表。此设计把输入端压降减少了几个数量级,使在低量程上输入端压降小于200μV。低的输入端压降使6485的功能比数字表更像一个理想的安培计,所以它可以很准确地测量电流,既使是源电压很低的电路。 INPUT CONNECTOR: BNC on rear panel. DISPLAY: 12 character vacuum fluorescent. RANGING: Automatic or manual. OVERRANGE INDICATION: Display reads “OVRFLOW”. CONVERSION TIME: Selectable 0.01 PLC to 60 PLC (50PLC under 50Hz operation). (Adjustable from 200μs to 1s) READING RATE: To internal buffer 1000 readings/second1 To IEEE-488 bus 900 readings/second1, 2 Notes: 1 0.01 PLC, digital filters off, front panel off, auto zero off. 2 Binary transfer mode. IEEE-488.1. BUFFER: Stores up to 2500 readings. PROGRAMS: Provide front panel access to IEEE address, choice of engineering units or scientific notation, and digital calibration. EMC: Conforms with European Union Directive 89/336/EEC, EN61326-1. SAFETY: Conforms with European Union Directive 73/23/EEC, EN61010-1. TRIGGER LINE: Available, see manual for usage. DIGITAL FILTER: Median and averaging (selectable from 2 to 100 readings). ENVIRONMENT: Operating: 0°–50°C; relative humidity 70% non-condensing, up to 35°C. Above 35°C, derate humidity by 3% for each °C. Storage: –25° to +65°C. WARM-UP: 1 hour to rated accuracy (see manual for recommended procedure). POWER: 100–120V or 220–240V, 50–60Hz, 30VA. PHYSICAL: Case Dimensions: 90mm high × 214mm wide × 369mm deep (31⁄2 in. × 83⁄8 in. × 149⁄16 in.). Working Dimensions: From front of case to rear including power cord and IEEE-488 connector: 394mm (15.5 inches). Net Weight: <2.8 kg (<6.1 lbs). Shipping Weight: <5 kg (<11 lbs). TEMPERATURE COEFFICIENT: 0°–18°C & 28°–50°C. For each °C, add 0.1 × (% rdg + offset) to accuracy spec. INPUT VOLTAGE BURDEN: <200μV on all ranges except <1mV on 20mA range. MAXIMUM INPUT CAPACITANCE: Stable to 10nF on all nA ranges and 2μA range; 1μF on 20μA and 200μA ranges, and on mA ranges. MAXIMUM CONTINUOUS INPUT VOLTAGE: 220VDC NMRR1: (50 or 60Hz) :60dB MAXIMUM COMMON MODE VOLTAGE: 42V. ISOLATION (Meter COMMON to chassis): Typically >5×1011Ω in parallel with <1nF. ANALOG OUTPUT: Scaled voltage output (inverting 2V full scale on all ranges) 3% ±2mV, 1kΩ impedance. 1 At 1 PLC – limited to 60 rdgs/sec under this condition. 2 At 6 PLC, 1 standard deviation, 100 readings, filter off, capped input –limited to 10 rdgs/sec under this condition. 3 Measured at analog output with resistive load >100kΩ. |
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