General Information; Model 6521 Features; Model 6522 Features; Warranty Information - Keithley 6521 Instruction Manual

1.1 Introduction
This section contains general information about the Models
6521 and 6522 scanner card options for the Model 6517
Electrometer. Both cards provide 10 channels of single-pole
switching. The Model 6521 is intended for use primarily
with the amps function, while the Model 6522 can be used
with the volts, amps, ohms, and charge functions. Both cards
have very low offset current and are designed for installation
in the Model 6517 rear panel OPTION SLOT.
Section 1 is arranged in the following manner:
1.2 Features

1.3 Warranty information

1.4 Manual addenda

1.5 Safety symbols and terms

1.6 Specification

1.7 Unpacking and inspection

1.8 Repacking for shipment
1.9 Optional accessories
1.2 Features

1.2.1 Model 6521 features

Key Model 6521 features include:
• 10 channels of single-pole switching designed for
amps.
• Input HI is connected to input LO when a channel is off
for true current switching.

General Information

• BNC input cables and a triax output cable to maintain
signal integrity.
• Low offset current (<1pA; <30fA typical).

1.2.2 Model 6522 features

Key Model 6522 features include:
• 10 channels of single-pole switching designed for volts,
ohms, amps and coulombs functions.
• When configured for current operation, input HI is con-
nected to input LO when a channel is off for true current
switching.
• Triax input cables and a triax output cable to maintain
signal integrity.
• Low offset current (<1pA; <30fA typical).
• High channel isolation and input isolation.
• Fully guarded operation is supported to maintain signal
integrity under high-impedance voltage measurement
conditions.
1.3 Warranty information
Warranty information is located on the inside front cover of
this instruction manual. Should your Model 6521/22 require
warranty service, contact the Keithley representative or
authorized repair facility in your area for further
information. When returning the scanner card for repair, be
sure to fill out and include the service form at the back of this
manual in order to provide the repair facility with the
necessary information.
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