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Resistance Range
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10kΩ - 1PΩ (dependent on test voltage) 4 Ranges or Auto Range:
Range 1: 1pA to 10nA, Range 2: 2nA to 100nA,
Range 3: 20nA to 10uA, Range 4: 2uA to 1mA
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Resistance Accuracy
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For Rx <20G (Vx): ±(2% of reading +5cnt) ,
For Rx >20G (Vx): ±(Vx/1pA) in ohms.
Max reading: Vx/0.1pA
Rx = Measured resistance in ohms, Vx = Programmed voltage in volts
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Voltage Range
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10 to 1000V DC in 1V steps, 1868A
50 to 5000V DC in 1V steps, 1868D
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Voltage Accuracy
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2% of setting, ±1V in uncalibrated mode
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Source Resistance
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100Ω, 1kV (1868A); 3.3kΩ, 5kV (1868D)
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Charge Current
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2/25/80mA (1868A); 2/10/18mA (1868D)
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Discharge Resistance
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100kΩ
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Current Measure
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1pA to 1mA
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Current Accuracy
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±[2% of reading +5cnts +1pA]
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Input Impedance
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For Ix > 10nA: 10kΩ ; For Ix < 10nA: 1MΩ ,Ix = Programmed current in amperes
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Measure Limits
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5 Programmable Limit Sets
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Measurement Result
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Resistance or Current
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Measurement Mode
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Continuous or Triggered
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Averaging
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1-100 measurements
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Test Speed
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Trigger Mode: 40msec, Continuous Mode: 90-4000msec,
(Depending on # to Average)
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Programmed Time
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Charge: 0 - 9999msec
(Charge R: 200Ω)
Measurement Delay: 0 - 9999msec
Discharge: 0 - 100sec or Auto mode
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Auto: 0.1(Cx) as Vx goes to 1% Vt
Cx = Measured capacitance (μF)
Vx = Programmed voltage (V)
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Zero/Offset
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Automatic Zeroing of All Ranges or Individual Zeroing of 4 Ranges
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Display
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LCD graphic display
3.5 digit resolution
Line Graph: X-Y: I or R versus Time
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Bar Graph: 8 ranges/2 decades/graph, Fixed or auto-scale
Indicators: HV, Measure, Bin, Remote
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Standard Interfaces
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RS232, IEEE 488, Remote I/O
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Internal Storage
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2 Global Setups (Save Instrument Setup and Sequence Setups)
4 User-Programmable Sequence Setups, (Up to 20 Steps each)
4 Pre-Programmed Sequence Setups
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External Storage
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PCMCIA Interface for 2M SRAM Memory
Cards (20 Setups/20 Steps each)
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Input Terminals
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HV: BNC Connector
I IN: Triaxial Connector
GUARD: Sheathed Banana Plug
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Safety
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Interlock Plug
Password-protected Charge Current (For I > 2mA)
HV Break Red LED/Push Button
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Dimensions
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(w x h x d):12.5 x 4.5 x 15.5 inches (312.5 x 112.5 x 387.5 mm)
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Weight
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28 lbs (12.7kg) net
41 lbs (18.6kg) ship
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Environmental
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Operating: 10°C to +40°C, 80% RH
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Power
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110V - 240V
50 or 60Hz
400W Max (1.8A at 220V AC, 3.2A at 125V AC)
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