2-6
2.8.2 Front panel calibration procedure
The paragraphs that follow will take you step-by-step the
comprehensive calibration procedure, which calibrates all
Model 6517A functions, including volts, ohms, amps, the
voltage source, temperature, and humidity.
Step 1: Prepare the Model 6517A for Calibration
1. With the power off, connect the Model 5156
Electrometer Calibration Standard to the rear panel
DIGITAL I/O jack using the supplied cable (see Figure
2-1). Note that the calibration unit is used to calibrate
the 20pA - 2µA amps ranges as well as all coulombs
ranges.
NOTE
The calibration standard must be con-
nected to the Model 6517A DIGITAL I/O
port in order to operate properly. Do not
connect any equipment except the Model
5156 Calibration Standard to the Model
6517A DIGITAL I/O port during calibra-
tion. Other equipment may be affected by
digital signals present during calibration.
2. Turn on the power, and allow the Model 6517A to warm
up for at least one hour before performing calibration.
3. Unlock comprehensive calibration by briefly pressing in
on the recessed front panel CAL switch, and verify that
the following message is displayed:
CALIBRATION UNLOCKED
Comprehensive cal can now be run
Table 2-2
Front panel calibration summary (cont.)
Step
Description
Equipment/connections
49
50
51
52
53
54
55
56
-100V voltage source calibration
0V 1000V range voltage source cal
400V voltage source calibration
1000V voltage source calibration
-1000V voltage source calibration
Humidity 0V calibration
Humidity 0.5V calibration
Humidity 1V calibration
DMM to V SOURCE OUT
DMM to V SOURCE OUT
DMM to V SOURCE OUT
DMM to V SOURCE OUT
DMM to V SOURCE OUT
DC calibrator to HUMIDITY
DC calibrator to HUMIDITY
DC calibrator to HUMIDITY
4. Enter the front panel calibration menu as follows:
a.
From normal display, press MENU. The instrument
will display the following:
MAIN MENU
SAVESETUP COMMUNICATION CAL
b. Select the CAL/CAL-OPT/CONTROL menu. The
instrument will then prompt you as to whether or not
you intend to use the calibration standard:
USE CAL OPTION
YES NO
c.
Select YES, then press ENTER followed by EXIT.
NOTE
The calibration option must be enabled in
order to use the recommended calibration
standard. See paragraph 2.11 for details.
d. The unit will then display the following prompt:
PERFORM CALIBRATION
COMPREHENSIVE POINT-CALS
e.
Select COMPREHENSIVE, then press ENTER.
5. At this point, the instrument will display the following
message to indicate that you have chosen the full cali-
bration procedure:
FULL CALIBRATION
Press ENTER to continue; EXIT to
abort calibration sequence