picoammeter

picoammeter

[‚pē·kō′am‚ēd·ər]
(engineering)
An ammeter whose scale is calibrated to indicate current values in picoamperes.
References in periodicals archive ?
Once the test board was submerged under water, the board's leakage current was measured using a Keithley 6487 Picoammeter over a period of 60 min.
Electrical measurements were carried out using Keithley 6487 picoammeter (Keithley Instruments Inc., USA).
A grid located at the exit of the mass filter (Faraday cup) can be used to measure the ion flux of the selected mass/size, and the resultant current is measured by a picoammeter. Therefore, the current signal reflects the population/number of the produced nanoclusters.
Ion current registration system consisted of a secondary electron multiplier R595 (Hamamatsu, Japan) and a picoammeter 6485 (Keithley, USA).
The I-V characteristics data were recorded at different temperatures in the range of 306-373 K using Keithley 230 programmable voltage source and Keithley 6485 picoammeter. The temperature was varied in room atmosphere to allow observation of device natural operational conditions.
Oxygen concentrations were measured using a Clark-style [O.sub.2] microelectrode (50-m tip; Unisense, Aarhus, Denmark) connected to a picoammeter (PA2000; Unisense).
A DMM can make current measurements down to 10 nA or so, but you need a picoammeter to go lower.
The electrical resistance (R) was carried out using a Keithley 6485 Picoammeter. The samples were placed between parallel plates and attached to the instrument.
Electrical sheet resistance ([R.sub.s]) of the samples was determined by a two-point method using KEITHLEY 487 picoammeter. For this measurement, additional Au contacts, about 50 nm thick, were created by sputtering.
The dark current [I.sub.d] and the photocurrent [I.sub.ph] were measured with a picoammeter (Keithley 485) at a constant voltage.
A stabilized voltage of 1.5 V was applied across the sample, and the resultant current was measured with a picoammeter.
Pittsford, NY, June 16, 2011 --(PR.com)-- PocketPico Picoammeter's high accuracy, fast speed, and single measurement range brings new features previously unavailable in other picoammeters, like small size, single 20pA - 2mA measurement range at 15,000 Sa/s, high accuracy ([+ or -]0.5%) and resolution (41/2 digits), protection against voltage transients, etc.