7078-TRX-BNC

Picoammeter Picoammeter/Voltage Source Designed for low current applications that require fast readings 486 487 486: • 10fA sensitivity • 180 readings per second • IEEE-488 interface 487: • Resistivity measurements (1016Ω) • ± 500V source • 10fA sensitivity • 180 readings per second • IEEE-488 interface The 486 is ideal for low-level DC current applications, such as: • PMT current measurements • mass spectrometer current measurements • probe current measurements in electrochemistry • plasma generated currents • ion chamber currents Operation is fast and convenient. Selectable analog and digital filters provide optimum wide-band performance with minimum noise. Autoranging selects the most appropriate range within 100ms. The measurement buffer holds up to 512 readings for fast data acquisition. Any reading within the buffer may be displayed, or the entire buffer may be searched for the maximum and minimum values. Other important features include REL, which allows measurements to be made relative to a selectable baseline. ZERO CHECK and CORRECT functions correct for voltage offset errors using front panel or software commands. Ordering Information 486 487 Picoammeter Picoammeter/Voltage Source These products are available with an Extended Warranty. LOW I/HIGH R PRODUCTS 486 Picoammeter The Model 486 is a 51⁄2-digit autoranging picoammeter designed for low current applications where fast reading rates must be made. It offers a speed of 180 readings per second. Accessories Supplied 237-ALG-2 Low Noise Triax Cable, 3-Slot Triax to Alligator Clips, 2m (6.6 ft) Model 487 also comes with 236ILC-3 Interlock Cable, 3m (10 ft) The IEEE-488 interface provides simple integration and convenient user interaction. Digital calibration can be accomplished over the bus or completely from the front panel. The display features three selectable intensities (bright, dim, and off) for use in light-sensitive environments. 487 Picoammeter/Voltage Source 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 500mΩ to 5 × 1016Ω. The unit displays either current or resistance. Reading intervals 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 resistivity, I-V measurements, component leakage, and insulation resistance. A common test procedure, written 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. 1.888.KEITHLEY (U.S. only) www.keithley.com A G R E A T E R M E A S U R E O F C O N F I D E N C E Picoammeter Picoammeter/Voltage Source AMMETER RESOLUTION 10 fA 100 fA 1 pA 10 pA 100 pA 1 nA 10 nA * When properly zeroed. MAXIMUM OVERLOAD: 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. INPUT VOLTAGE BURDEN: