6517B Electrometer/High Resistance Meter
The 6521 Low Current Scanner Card is a 10-channel
multiplexer, designed for switching low currents
is well suited for automating reverse leakage tests on
semiconductor junctions or gate leakage tests on FETs.
in multipoint testing applications or when the test
configuration must be changed. Offset current on each
channel is <1 pA and high isolation is maintained between
each channel (>1015 Ω). The 6521 maintains the current
path even when the channel is deselected, making it a
true current switch. BNC input connectors help provide
shielding for sensitive measurements and make the card
compatible with low noise coaxial cables. The 6521
The 6522 Voltage/Low Current Scanner Card can
provide up to ten channels of low-level current, high
impedance voltage, high resistance, or charge switching.
Although it’s similar to the 6521 in many ways, the 6522’s
input connectors are 3-lug triax. The card can be software
configured for high impedance voltage switching of up
to 200 V. Triaxial connectors make it possible to float the
card 500 V above ground and drive guard to 200 V.
6522 Voltage/Low Current Scanner Card.
6521 Low Current Scanner Card.
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6522 schematic.
6521 schematic.
6521 and 6522 Specifications
Channels Per Card
10.
Functions
6521: Amps. 6522: Volts, Amps.
Contact Configuration
Single pole, “break-before-make” for signal HI input. Signal LO is common for all 10 channels and output. When a
channel is off, signal HI is connected to signal LO. 6522: 6517B can also configure channels as voltage switches.
Connector Type
Signal Level
6521: Inputs: BNC. Outputs: Triaxial. 6522: Inputs: Triaxial. Outputs: Triaxial.
6521: 30 V, 500 mA, 10 VA (resistive load). 6522: 200 V, 500 mA, 10 VA (resistive load).
Contact Life
>106 closures at maximum signal level; >107 closures at low signal levels.
Contact Resistance
Contact Potential
Offset Current
<1 Ω.
<200 µV.
<1 pA (<30 fA typical at 23°C, <60% RH).
2 ms.
Actuation Time
Common Mode Voltage
Channel Isolation (6522)
Input Isolation (6522)
Environment
6521: <30 V peak. 6522: <300 V peak.
>1013 Ω, <0.3 pF.
>1010 Ω, <125 pF (Input HI to Input LO).
Operating: 0°C to 50°C up to 35°C at 70% R.H. Storage: –25°C to 65°C.
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