Keithley 6517B Reference Manual

Section 16: Verification procedure Model 6517B Electrometer Reference Manual
16-12 6517B-901-01 Rev. C / August 2015
2. Turn on the power to the Model 6517A and allow it to warm up for at least two hours before
making measurements.
3. Enable the Model 6517B humidity measurements by turning on the humidity data stamp.
a. Press MENU, use the right arrow key to select GENERAL on the second page of the lower
display, and then press ENTER.
b. Use the right arrow key to select A/D-CONTROLS, and then press ENTER.
c. Select DATA-STAMP, and then press ENTER.
d. Use the left or right arrow keys to select HUMIDITY, and then use the range up or range down key to
select ON.
e. Press ENTER, and then press EXIT three times to return to the measurement display.
f. Press PREV to view the relative humidity (RH) reading.
4. Set the calibrator output to 0.0 V.
5. Allow the reading to settle, then verify that the Model 6517B humidity reading is within the limits in
the following table.
6. Repeat step 5 for each of the voltage setting list in the table.
Limits for humidity verification
Applied
voltage
Humidity reading limits
(1 year, 18° to 28°C)
0.0 V 0 % to 1 %
0.25 V 24 % to 26 %
0.5 V 49 % to 51 %
0.75 V 74 % to 76 %
1.0 V 99 % to 100 %
Ohms verification
Ohms function accuracy is verified by connecting accurate resistance standards to the Model 6517B
and then verifying that the readings on the display fall within the required ranges. The following
paragraphs discuss the required resistance standards, how to compute voltage source values, and
provide detailed procedures for verifying accuracy of the ohms function.
Ohms specifications are derived from amps and voltage source specifications. Thus, it is not
necessary to verify ohms separately. However, the following procedure is provided if you want to
perform an Artifact Standard Verification.
Required standard resistors
Resistance standards required include:
 Resistance calibrator (2 MΩ to 200 MΩ ranges)
 Model 5156 Electrometer Calibration Standard (2 GΩ to 200 GΩ ranges)
 Characterized resistors (2 TΩ to 200 TΩ ranges)
See the Equipment needed for verification (on page 16-2) topic for detailed information on the
recommended standard resistors.

Keithley 6517B Specifications

General

Brand	Keithley
Model	6517B
Category	Measuring Instruments
Language	English