Keithley 6514 User Manual

Performance Verification 18-17
200MΩ-200GΩ range accuracy
1. Connect Model 5156 Electrometer Calibration Standard to Model 6514, as shown in
Figure 18-5. Initially, connect the BNC shorting cap to the 100MΩ resistance jack. Be
sure to remove the link between SHIELD and CHASSIS, and connect Model 5156
CHASSIS jack to Model 6514 COMMON terminal.
WARNING Hazardous voltage may be present on Model 5156 SHIELD and OUTPUT
jacks.
2. Select Model 6514 ohms function with the Ω key.
3. Using the GRD key, enable Model 6514 guard mode.
4. Verify resistance measurement accuracy for the 200MΩ-200GΩ ranges as listed in Table
18-6. For each test point:
• Select the correct Model 6514 measurement range.
• Connect the BNC shorting cap to select the appropriate standard resistor.
• If the standard resistance differs from the nominal value, recalculate new reading
limits based on the resistance and Model 6514 accuracy specifications.
•Verify that Model 6514 resistance reading is within the required reading limits.
Table 18-6
200M
Ω -200G Ω resistance measurement accuracy limits
Model 6514 range Standard resistance
1
Model 6514 ohms reading limits
(1 Year, 18˚C-28˚C)
2
200MΩ 100MΩ 99.697 to 100.303MΩ
2GΩ 1GΩ 0.98496 to 1.01504GΩ
20GΩ 10GΩ 9.8497 to 10.1503GΩ
200GΩ 100GΩ 98.497 to 101.503GΩ
1
Nominal resistance values.
2
Reading limits based on Model 6514 accuracy specifications and nominal resistance values. If
actual resistance values differ from nominal values shown, recalculate reading limits using actual
standard resistance values and Model 6514 one-year accuracy specifications. See Verification
limits earlier in this section for details.
RS232DIGITAL I/O
PREAMP
250V PK
2V
OUTPUT
COMMON CHASSIS
120
FUSE LINE
630mA
LINE RATING
50, 60Hz
60 VA MAX
T
(SB)
100 VAC
120 VAC
315mAT
(SB)
220 VAC
240 VAC
INPUT 250V PK
IEEE-488
(CHANGE IEEE
WITH FRONT PANEL MENU)
TRIGGER LINK
!
!
MADE IN
U.S.A.
V, GUARD
(PROGRAMMABLE)
OFF
ON
GUARD
(FOLLOWS
INPUT)
(INTERNAL)
INPUT PREAMP
10K
PREAMP
OUT
2V
OUTPUT
COM
To Shield
Model 6514 Electrometer
Triax Cable
100G
Ω
100M
Ω
10G
Ω
1G
Ω
1nF
100nF
OUTPUT
Model 5156 Calibration Standard
!
BNC shorting
cap
Remove SHIELD to CHASSIS link
Connect SHIELD to 6514 COMMON
Note: Enable guard mode.
Input
Figure 18-5
Connections for ohms
verification (200M
Ω -
200G
Ω ranges)

Keithley 6514 Specifications

General

Brand	Keithley
Model	6514
Category	Measuring Instruments
Language	English