User manual

Front Panel Operation
2001-900-01 Rev. K/ August 2010 3-115
STATUS
Use this menu item to view the IEEE-488 status byte. Refer
to Section 4 (IEEE-488 Reference) for information on the
status byte. To select STATUS, place the cursor on STATUS
and press ENTER. If, for example, all bits of the status byte
are cleared, it is displayed as follows:
SHOW STATUS BYTE
MSB=0 EAV=0 QSB=0 MAV=0
ESB=0 MSS=0 OSB=0
When finished viewing the status byte, press either ENTER
or EXIT. The instrument returns to the GPIB/PRINTER
SETUP menu.
The bits in the status byte are refreshed by exiting and re-en-
tering its menu.
3.12.3 CALIBRATION
The CALIBRATION menu is used for the following
operations:
• To perform comprehensive calibration.
• To perform AC self-calibration.
• To view or change the calibration date.
Some of the menu items are locked to prevent unintended
changing of calibration constants. To display the
CALIBRATION menu from the top level of the main menu,
use the cursor keys ( and ) to place the cursor on
CALIBRATION, then press ENTER. The following is
displayed:
PERFORM CALIBRATION
COMPREHENSIVE AC-ONLY-CAL
CALIBRATION-DATES
COMPREHENSIVE
The procedure for comprehensive calibration is locked; to
enable it requires the CAL switch to be pressed. The
procedure uses accurate calibration equipment to supply
precise DC voltages and resistance values. Refer to the
Model 2001 Calibration Manual for instructions.
AC-ONLY-CAL
Use this menu item to perform the AC self-calibration
procedure. This procedure requires no external equipment
and can be performed at any time by the user to ensure the
accuracy of ACV and ACI measurements.
NOTE
The AC calibration constants generated by
this procedure are not permanently stored.
They are in effect only until the power is
turned off. To permanently store AC cali-
bration constants, refer to the Model 2001
Calibration Manual.
To perform an AC-only calibration, follow these steps:
1. The Model 2001 must be allowed to warm up for at least
one hour before calibration.
2. Disconnect all test leads or cables from the front and
rear INPUT and SENSE jacks.
3. To select AC-ONLY-CAL from the PERFORM CALI-
BRATION menu, place the cursor on AC-ONLY-CAL
and press ENTER. The following message is displayed:
AC CALIBRATION PHASE
Open-circuit inputs; Press ENTER
to calibrate, or EXIT to abort
4. Press ENTER to begin AC calibration, which takes
about six minutes to complete. During AC calibration,
the instrument displays the following:
Calibrating AC: Please wait
NOTE
All keypresses are locked out while a cal-
ibration step is in progress.
5. Once the process has successfully completed, the mes-
sage below is displayed, and you can press ENTER or
EXIT to return to a normal display:
AC CAL COMPLETE
Press ENTER or EXIT to continue.
CALIBRATION-DATES
Use this menu item to view or change the calibration dates.
To select CALIBRATION-DATES, place the cursor on
CALIBRATION-DATES and press ENTER. The following
menu is displayed:
CALIBRATION DATES
VIEW DISPLAY-AT-POWERUP CHANGE
Use the VIEW option of the menu to display the last
calibration date and the next calibration date. The DISPLAY-
AT-POWERUP option controls whether the next calibration
date is displayed during the power-up sequence.