Keithley 2001 Calibration Manual

2
Calibration
2-1
2.1 Introduction
This section gives detailed procedures for calibrating the
Model 2001. There are three types of calibration procedures:
• Comprehensive calibration
• AC self-calibration
• Low-level calibration
Comprehensive calibration requires accurate calibration
equipment to supply precise DC voltages and resistance val-
ues. AC self-calibration requires no external equipment and
can be performed at any time by the operator. Low-level cal-
ibration is normally performed only at the factory where the
instrument is manufactured and is not usually required in the
field.
NOTE
Low-level calibration is required in the
field only if the Model 2001 has been re-
paired, or if the other calibration proce-
dures cannot bring the instrument within
stated specifications.
Section 2 includes the following information:
2.2 Environmental conditions: States the temperature
and humidity limits for calibration.
2.3 Warm-up period: Discusses the length of time the
Model 2001 should be allowed to warm up before cal-
ibration.
2.4 Line power: States the power line voltage limits when
calibrating the unit.
2.5 Calibration lock: Explains how to unlock calibration
with the CAL switch.
2.6 IEEE-488 bus calibration commands and program:
Summarizes bus commands used for calibration, lists
a simple calibration program, and also discusses other
important aspects of calibrating the instrument over
the bus.
2.7 Calibration errors: Details front panel error messages
that might occur during calibration and also explains
how to check for errors over the bus.
2.8 Comprehensive calibration: Covers comprehensive
(user) calibration from the front panel and over the
IEEE-488 bus.
2.9 AC self-calibration: Discusses the AC user calibra-
tion process, both from the front panel and over the
IEEE-488 bus.
2.10 Low-level calibration: Explains how to perform the
low-level calibration procedure, which is normally re-
quired only at the factory.
2.2 Environmental conditions
Calibration procedures should be performed at an ambient
temperature of 23°± 1°C, and at a relative humidity of less
than 80% unless otherwise noted.

Keithley 2001 Specifications

General

Model	2001
Category	Multimeter
Manufacturer	Keithley
Type	Digital Multimeter
Digits of Resolution	7.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Connectivity	GPIB, RS-232
Display	VFD
Resistance Accuracy	0.008% + 2.0 mΩ
Frequency Accuracy	±0.01%
DC Current Range	10 μA to 3 A
AC Current Range	10 μA to 3 A
Power Supply	100 V to 240 V AC, 45 Hz to 66 Hz