Keithley 2002 User Manual

Front Panel Operation
2-7
Perform the following to view or change the plus and minus
percentage of range:
1. From a voltage, current, or resistance function, press
CONFIG and then NEXT or PREV DISPLAY. The fol-
lowing is displayed:
ZERO-BARGRAPH±50.00%
2. Change the percentage by using the cursor keys and the
RANGE ▲ and ▼ keys to enter a numeric value (0.01 -
99.99%). Press ENTER when done. The same percent-
age of range is used for voltage, current, and resistance
measurements.
Perform the following to view or change the plus and minus
value limit:
1. From the frequency or temperature function, press
CONFIG and then NEXT or PREV DISPLAY. The fol-
lowing menu is displayed:
BARGRAPH TYPE
ZERO-AT-LEFT ZERO-CENTERED
2. Use the cursor keys ( and ) to place the cursor on
ZERO-CENTERED and press ENTER. You will access
one of the following menus:
For frequency:
FREQ ZEROBARGRAPH(±)
1Hz 10Hz 100Hz 1kHz 10kHz
100kHz 1MHz 10MHz 15MHz
For temperature:
ZERO-BARGRAPH±0002°C
3. Change the frequency limits by highlighting one of the
selections and pressing ENTER. For the temperature,
use the cursor keys and the RANGE ▲ and ▼ keys to
enter a numeric value (0 - 9999°C). Press ENTER when
done.
Maximum and minimum
The maximum and minimum multiple display shows the
maximum and minimum readings since the display was en-
tered. (See Figure 2-3.) The maximum and minimum values
are reset by the following:
• Pressing the present function key.
• Leaving the display by changing function or entering a
menu.
The resolution, units, and prefix on the bottom line are the
same as shown for top line reading. If necessary, the bottom
line values automatically change to scientific notation,
rounded to 4.5 digits.
2.3.2 Information messages
Press the INFO key to view context-sensitive information
from most of the displays. An arrow ( or ) on the bot-
tom line indicates that there is more information. Use the
cursor keys ( and ) to view the complete line. To exit
an INFO display, just press INFO, ENTER, EXIT, or a func-
tion key.
2.3.3 Status and error messages
During Model 2002 operation and programming, you will
encounter a number of front panel messages. Typical
messages are either of status or error variety, as listed in
Table 2-4.
The most recent status or error messages can be momentarily
displayed. Just enter a configuration menu or the main menu,
and press the PREV key. (The display is blank if no message
is queued.)
Figure 2-3
Maximum and minimum multiple display
Minimum
value
-15.82867 VDC
Max = -05.74602 Min = -15.82867
Maximum
value

Keithley 2002 Specifications

General

Resolution	8.5 digits
DC Voltage Accuracy	±0.0006%
Maximum DC Voltage	1000 V
Maximum AC Voltage	750 V
Maximum DC Current	3 A
Maximum AC Current	3 A
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	10 Ω to 1 GΩ
Model	2002
Category	Multimeter
Interface	GPIB, RS-232
AC Current Accuracy	±0.1%
Frequency Range	0.1Hz to 300kHz
Display	VFD
Type	Digital
Power Supply	100-240V AC, 50/60Hz
Current Range (DC)	100 μA to 3 A
Current Accuracy (DC)	±0.01%
Current Range (AC)	100 μA to 3 A
Current Accuracy (AC)	±0.1%
DC Current Range	100 μA to 3 A
AC Current Range	100 μA to 3 A