Keithley 6485/E Bench Digital Multimeter, 20mA ac 20mA dc

  • RS Stock No. 760-0307
  • Mfr. Part No. 6485/E
  • Manufacturer Keithley
Technical data sheets
Legislation and Compliance
RoHS Status: Exempt
COO (Country of Origin): CN
Product Details

Keithley 6485 Picoammeter

Measuring low DC currents may demand more than a DMM can deliver. Electrometers measure low currents but have costly circuitry and functions. The Keithley 6485 5-digit Picoammeter offers sensitive current measurement instrumentation with enhanced speed and robust design. With eight current measurement ranges and high speed autoranging, it measures currents from 20fA to 20mA. The 6485, comparable in price with a general-purpose DMM, makes picoamp-level measurements affordable to most laboratories and production floors.

Features and Benefits:

• 10fA resolution • 5-digit resolution
• <200μV burden voltage
• Up to 1000 readings/second
• Built-in Model 485 emulation mode
• IEEE-488 and RS-232 interfaces
• Analog output
• Current Ranges 2nA–20mA
• Voltage Burden 200μV (1mV on 20mA range)
• Reading Rate
• Storage Buffer2500 points
• Analogue Output

When do you need a picoammeter?

Measuring low DC currents often demands a lot more than a digital multimeter (DMM) can deliver. Generally, DMMs lack the sensitivity required to measure currents less than 100nA. Even at higher currents, a DMM’s input voltage drop (voltage burden) of hundreds of millivolts can make accurate current measurements impossible. Electrometers can measure low currents very accurately, but the circuitry needed to measure extremely low currents, combined with functions like voltage, resistance, and charge measurement, can increase an electrometer’s cost significantly. The Model 6485 Picoammeter combines the economy and ease of use of a DMM with low current sensitivity near that of an electrometer.

What are the typical applications?

• Beam monitoring and radiation monitoring • Leakage current testing in insulators, switches, relays, and other components
• SEM beam current measurements
• Galvanic coupling measurements
• Optoelectronic device testing and characterisation
• Optical fiber alignment
• Circuit test and analysis in
• Sensor characterization
• I-V measurements of semiconductors and other devices
• Nanoelectronic device characterisation
• Capacitor leakage
• Teaching labs

What's in the box?

• Protective shield/cap (2-lug) • Low noise BNC input cable 1.2m (4ft)
• User Manual

Case Dimensions:

High: 90mm Width: 214mm
Deep: 369mm


Attribute Value
Multimeter Type Bench
Absolute Maximum AC Current Measurement 20mA ac
Absolute Maximum DC Current Measurement 20mA dc
Functions Measured AC Current, DC Current
Display Type Digital
Model Number p 6485/E
DC Current Measurement Resolution 10fA dc
AC Current Measurement Resolution 10fA ac
Best AC Current Accuracy ±0.04% + 400 fA ac
Minimum Operating Temperature 0°C
Dimensions 90 x 214 x 369mm
Length 369mm
Width 214mm
Weight 2.8kg
Best DC Current Accuracy ±0.04% + 400 fA dc
Maximum Operating Temperature +50°C
Height 90mm
4 In stock for delivery within 4 working days
Price Each
Was SGD4,278.42
SGD 4,174.80
(exc. GST)
SGD 4,467.04
(inc. GST)
Per unit
1 +
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