Keithley 2001 Calibration Manual

Performance Verification
1-4
1.8 Verification procedures
The following paragraphs contain procedures for verifying
instrument accuracy specifications for the following measur-
ing functions:
•DC volts
• AC volts
• DC current
• AC current
• Resistance
•Frequency
• Temperature
If the Model 2001 is out of specifications and not under war-
ranty, refer to the calibration procedures in Section 2.
WARNING
The maximum common-mode voltage
(voltage between INPUT LO and chas-
sis ground) is 500V peak. Exceeding this
value may cause a breakdown in insula-
tion, creating a shock hazard. Some of
the procedures in this section may ex-
pose you to dangerous voltages. Use
standard safety precautions when such
dangerous voltages are encountered to
avoid personal injury caused by electric
shock.
NOTE
Do not connect test equipment to the Mod-
el 2001 through a scanner.
1.8.1 DC volts verification
DC voltage accuracy is verified by applying accurate DC
voltages from a calibrator to the Model 2001 input and veri-
fying that the displayed readings fall within specified ranges.
Follow the steps below to verify DCV measurement accura-
cy.
CAUTION
Do not exceed 1100V peak between IN-
PUT HI and INPUT LO, or instrument
damage may occur.
1. Turn on the Model 2001 and the calibrator, and allow a
one-hour warm-up period before making measure-
ments.
NOTE
Use shielded, low-thermal connections
when testing the 200mV range to avoid er-
rors caused by noise or thermal offsets.
Connect the shield to calibrator output
LO. (See Table 1-1.)
2. Connect the Model 2001 to the calibrator, as shown in
Figure 1-1. Be sure to connect calibrator HI to Model
2001 INPUT HI and calibrator LO to Model 2001 IN-
PUT LO as shown.
3. Restore Model 2001 factory default conditions, as ex-
plained in paragraph 1.7.
4. Set digital filter averaging as follows:
A. From normal display, press CONFIG then DCV.
B. Select FILTER, then press ENTER.
C. Select AVERAGING, then press ENTER.
D. Using the cursor and range keys, set the averaging
parameter to 10 readings, then press ENTER.
E. Press EXIT as necessary to return to normal display.
F. If the FILT annunciator is off, press FILTER to en-
able the filter.
5. Select the Model 2001 200mV DC range.
NOTE
Do not use auto-ranging for any of the ver-
ification tests because auto-range hystere-
sis may cause the Model 2001 to be on an
incorrect range.
6. Set the calibrator output to 0.000000mVDC, and allow
the reading to settle.
7. Enable the Model 2001 REL mode. Leave REL enabled
for the remainder of the DC volts verification test.
8. Set the calibrator output to +190.0000mVDC, and allow
the reading to settle.
9. Verify that the Model 2001 reading is within the limits
summarized in Table 1-2.
10. Repeat steps 8 and 9 for the remaining ranges and volt-
ages listed in Table 1-2.
11. Repeat the procedure for each of the ranges with nega-
tive voltages of the same magnitude as those listed in Ta-
ble 1-2.

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English