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Keithley 487 Picoameter/Voltage Source, Capable of low current&high resistance. The Model 487 is designed for measurement of low currents and very high resistances. This instrument incorporates all the capabilities of the 486, and adds a programmable ±500V source. This combination of picoammeter and voltage source provides a powerful high resistance meter and fast picoammeter in one instrument. The 487 makes current measurements from 10fA to 2mA. Two voltage source ranges are available: a 500V range with 10mV resolution and a 50V range with 1mV resolution. A PRESET button allows the user to toggle between two separate source values. The 487 sources up to 500V, measures the current with 10fA sensitivity, and then instantly calculates the resistance value, from 500 mto 5 10 16 .. The unit displays either current or resistance. Reading inter-vals from 10ms to 1000s can be programmed, simplifying tests that require a predetermined "soak" time. Two displays, one for current readings and one for voltage sourcing, permit the voltage setting and the measured current to be viewed throughout the measurement. The Model 487 and the 6517A are the most effective test instruments for performing such tasks as resis-tivity, I-V measurements, component leakage, and insulation resistance. A common test procedure, writ-ten by the American Society of Testing and Materials, D257: D-C RESISTANCE OR CONDUCTANCE OF INSULATING MATERIALS, is easily performed with the 487 or the 6517A. ACCURACY (1 Year)* Rise Time (10%–90%) RANGE RESOLUTION ±(%rdg+offset) OFF ON 2 nA 10fA 0.3 + 500 fA 12 ms 70 ms 20 nA 100 fA 0.2 + 3 pA 4 ms 17 ms 200 nA 1 pA 0.15 + 20 pA 800 µs 4 ms 2 µA 10 pA 0.15 + 200 pA 380 µs 2 ms 20 µA 100 pA 0.1 + 2 nA 160 µs 370 µs 200 µA 1 nA 0.1 + 20 nA 160 µs 370 µs 2 mA 10nA 0.1 + 200 nA 160 µs 370 µs 350V peak on nA ranges and 2µA range; 50V peak on 20µA, 200µA, and 2mA ranges. Higher voltage sources must be current limited at 3mA. <200µV (18°–28°C) for inputs <100µA; <2mV for inputs =100µA; 20µV/°C tempera-ture coefficient. TEMPERATURE COEFFICIENT (0°–18°C & 28°–50°C): ±(0.15 applicable accuracy specification)/ °C. >60dB at 50Hz (LINE 50Hz integration) or 60Hz (LINE 60Hz integration). ±2V for full range input (non-inverting). ±(2.5% + 3mV); resistive loads >2k; 18°–28°C. <200ms to final range (analog filter OFF). SELECTABLE CURRENT LIMIT: 2.5mA ±0.5mA or 25µA ±5µA. ±(0.003% + 1mV) over 24 hours at constant temperature. All parameters programmable except for IEEE-488 bus address and frequency for line integration. <50ms (trigger on TALK, ATN false to talker DAV true, G7 data format). Stores up to 512 readings and identifies minimum and maximum reading. PROGRAMMABLE READING INTERVAL: 10ms to 999.999s in 1ms increments. One-shot or continuous from front panel, IEEE-488 bus, and rear panel BNC. 1ms to 999.999s in 1ms increments. One ten character plus one eight character alphanumeric LED displays with normal/dim/off intensity control. MAXIMUM VOLTAGE BETWEEN VOLTAGE SOURCE AND CURRENT METER: MAXIMUM VOLTAGE BETWEEN CHASSIS AND VOLTAGE SOURCE OR CUR-RENT METER: External Trigger and Meter Complete: Conforms to European Union Directive 89/336/EEC. Conforms to European Union Directive 73/23/EEC (meets EN61010-1/IEC 1010). 0°–50°C, <70% RH up to 35°C; linearly derate 3% RH/°C, up to 50°C. Storage: –25° to 60°C. 105–125V AC or 210–250V AC (external switch selectable), 90–110V and 180–220V AC version available. 50Hz or 60Hz, 45VA maximum. 90mm high 213mm wide 397mm deep (3 1 /2 in 8 3 /8 in 15 5 /8 in). All Items sell with 5 days right of return, and 15 days GUARANTEE on all parts and labor. If in order to comply with our guarantee, we need to refund your money, you will get a FULL refund for the price of the unit... If you need to make use of the 15 days Guarantee - We will fix, or replace, your unit. In case every attempt to fix or replace it fails, we’ll refund your money. (please look at our rules and privacy policy) |
jameskerr@machine--tools.com (James Kerr) for additional information. This email is used for forwarding to newsgroup user.
