1
General Information
1-1
1.1
Introduction
This section contains general information about the
Model 1801 Nanovolt Preamp option for the Model 2001
Multimeter. The Model 1801 adds 20µV, 200µV, and 2mV
DC volts and 500µV RMS AC voltage measurement
ranges to the Model 2001 and includes 2m
Ω
through
200
Ω
4-wire resistance ranges. The Model 1801 can also
be used for frequency and differential thermocouple tem-
perature measurements.
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
Specifications
1.7
Unpacking and inspection
1.8
Repacking for shipment
1.9
Model 2001 compatibility
1.10 Optional accessories
1.2
Features
The Model 1801 is designed to be used with the Model
2001 Multimeter. Key features include:
•
High sensitivity: The Model 1801 increases the DC
voltage measurement sensitivity of the Model 2001
by a factor of 10,000.
•
Low noise: Excellent noise rejection ensures minimal
noise effects on the measurement.
•
Low-thermal input connections: Copper-to-copper
input connections are used to minimize offsets caused
by thermal EMFs.
•
Thermal isolation enclosure: An insulated enclosure
is supplied for the preamplifier in order to minimize
the effects of temperature variations.
•
Integrated operation: Automatic power-up detection
of the Model 1801 integrates range and function
selection and reading display from the Model 2001
Multimeter front panel. Model 1801 operation can be
enabled or disabled with a front panel menu selection.
1.3
Warranty information
Warranty information is located on the inside front cover
of this instruction manual. Should your Model 1801
require warranty service, contact the Keithley representa-
tive or authorized repair facility in your area for further
information. When returning the preamplifier 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.