KEITHLEY 485 CALIBRATION and KEITHLEY 485 REPAIR
The KEITHLEY 485 is currently in stock and available for purchase on our  Sales Page
It is also available for immediate rental.
A calibration by Custom-Cal is performed by engineers with extensive OEM experience. We have the expertise and the necessary standards to perform the KEITHLEY 485 Calibration, onsite calibration may be available. We specialize in quick turnaround times and we can handle expedited deliveries upon request.

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   KEITHLEY 485   Description / Specification:    
KEITHLEY 485 Autoranging Digital Picoammeter

The Keithley 485 Autoranging Picoammeter provides 100fA sensitivity with 4 1/2 -digit resolution in a low-cost, highly sensitive, easy-to-use instrument. The 485 measures DC current on seven ranges covering 10 decades from 100fA to 2mA. The input can withstand overloads as high as 1000V (with 100k-ohm limiting resistor). An analog output linearly converts the incoming current to voltage for hard copy output or control loop applications. The 485 has several features that facilitate measuring low current. In the AUTORANGE mode, the 485 maximizes resolution. The REL button makes readings relative to the baseline (the reading prior to touching the button). The LOG button converts the display to the logarithm (base 10) of the absolute value of the measured current. Digital calibration is performed from the front panel or over the bus. A 100-point DATA STORE buffer collects and stores measurements at one of six automatic reading rates from three per second to one per hour, or manually with the STORE button. Minimum and maximum readings are continuously updated at three per second in the DATA STORE mode. Display: 41/2-digit LCD, 0.5 in height; polarity, range, and status indication. Measures from 2 nA to 2 mA full scale with a 1 year accuracy of ±(0.4% + 4 counts) on the 2 nA range (worst case). Manual or autoranging. Analog output (+1 V = -10000 counts, except +100 mV on 2 nA range). DC voltage input 50V to 350V.



 

Standard Calibration $220.00 *
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*This is a Web introductory price for one calibration of the KEITHLEY 485. Price does not in most cases include measurement performance data. Pricing does include NIST traceable calibration and issue of a calibration certificate and calibration label. Pricing may vary slightly due to volume and location of laboratory supporting calibration. Volume pricing may apply. On-site fees may apply depending on logistics, location and volume of work to be completed during the visit.


Related Bench Equipment Terms and Definitions. For a complete list go to our  Terms and Definitions Page.

Crest Factor
Crest factor or peak-to-average ratio (PAR) is a measurement of a waveform, calculated from the peak amplitude of the waveform divided by the RMS value of the waveform

Linearity
Linearity is the relative difference between the displayed power ratio, Dx/D0, and the actual (true) power ratio Px/P0 caused by changing the displayed power level from the reference level, D0, to an arbitrary displayed level, Dx.

Phase Noise
Phase noise is the frequency domain representation of rapid, short-term, random fluctuations in the phase of a waveform, caused by time domain instabilities. Phase noise (L(f)) is typically expressed in units of dBc/Hz, representing the noise power relative to the carrier contained in a 1 Hz bandwidth centered at a certain offsets from the carrier.

Sensitivity
Sensitivity is the minimum magnitude of input signal required to produce a specified output signal having a specified signal-to-noise ratio, or other specified criteria.

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