Keithley 2260B User Manual
2260B Series
www.keithley.com
Verification
Procedure
A Tektronix
Company
A
G R E A T E R M E A S U R E O F C O N F I D E N C E
Multi-Range
Programming
DC Power
Supplies
077-1048
-01/ A
u
g
u
s
t
2015
Series 2260B
Multi-Range Programmable DC Power Supplies
VERIFICATION PROCEDURE
ISO-9001 CERTIFIED MANUFACTURER
This manual contains proprietary information, which is protected by copyright. All rights are reserved.
No part of this manual may be photocopied, reproduced or translated to another language without
prior written consent of Keithley company.
The information in this manual was correct at the time of printing. However, Keithley continues to
improve products and reserves the rights to change specification, equipment, and maintenance
procedures at any time without notice.
Table of Contents
1
Table of Contents
Preparing for Verification ....................................................... 2
List of Equipment for Verification ............................................ 3
Constant Voltage Tests .......................................................... 4
Voltage Programming and Measurement Accuracy .............................................. 4
CV Load Regulation ............................................................................................. 5
CV Line Regulation .............................................................................................. 6
CV Ripple and Noise ............................................................................................ 7
Transient Recovery Time ..................................................................................... 8
Constant Current Tests ........................................................ 10
Current Programming and Measurement Accuracy ............................................ 10
CC Load Regulation ........................................................................................... 11
CC Line Regulation ............................................................................................ 12
Verification Test Record Form ............................................... 13
30V ................................................................................................................... 13
80V ................................................................................................................... 15
250V ................................................................................................................. 17
800V ................................................................................................................. 19
2260B Verification Procedure
2
Preparing for Verification
Note
In order to ensure performance accuracy, we recommend
you to verify all items listed in this chapter at once.
When to verify the
specification
When using the power supply in a new environment
After replacing one of the major internal modules, such
as front panel or power supply PCB
When you need to make sure that the power supply is
malfunctioning or not
Verification
Environment
Location: Indoor, no direct sunlight, dust free
Relative Humidity: < 80%
Temperature: +18~+28°C
Warm-up time: ≥ 30 minutes
When the
verification fails…
Calibrate the instrument when a corresponding
calibration item exists.
For other items, send the power supply back to the
factory for repair.
List of Equipment for Verification
3
List of Equipment for Verification
Here is the list of all equipment used in the service operations.
Type
Specifications
Recommended Model
Digital Voltmeter
Resolution: 1 uV @ 1V
Keithley Model
2000 or equivalent
Readout: 6 1/2 digits
Current Shunt
3A (0.1Ω) 0.02%, TC=10ppm/℃
30A (0.01Ω) 0.02%, TC=10ppm/℃
300A (0.001Ω) 0.02%,
TC=10ppm/℃
Oscilloscope
Sensitivity: 1 mV
Bandwidth Limit: 20 MHz
Probe: 1:1 with JEITA RC-9131B
Tektronix
DPO4014B or
equivalent
AC Power Source
Adjustable to highest rated input
voltage range.
Power: 3000 VA
Ametek 3001i or
equivalent
Electronic Load
60V, 240A minimum, with transient
capability and a slew rate of 1A/us
or better.
Ametek SLH, SLM
or PLA series
electronic loads or
equivalent
500V, 60A minimum, with transient
capability and a slew rate of
0.4A/us or better
1000V, 12A minimum, with
transient capability and a slew rate
of 0.2A/us or better
2260B Verification Procedure
4
Constant Voltage Tests
Voltage Programming and Measurement Accuracy
Connection
Fig. 1
L
N
G
AC Power Source
2260B
L
N
＋
－
＋
－
V
Precision
Current Shunt
A
＋
－
+V
-V
+S
-S
Background
This test verifies that the voltage programming and
measurement functions are within specifications.
Procedure
1. Turn off the power supply and connect the DVM from
the PCS-1000 directly across the +S and -S terminals as
shown in the fig. 1 connection.
2. Turn on the power supply and program the output
voltage to zero and the output current to its maximum
programmable value (Imax) with the load off. The CV
indicator should be on and the output current reading
should be approximately zero.
3. Record the output voltage readings on the digital
voltmeter (DVM) and the voltage measured over the
interface. The readings should be within the limits
specified in the test record form for the appropriate
model under Voltage Programming and Measurement,
Minimum Voltage Vout.
4. Program the output voltage to its full-scale rating.
5. Record the output voltage readings on the DVM and
the voltage measured over the interface. The readings
should be within the limits specified in the test record
form for the appropriate model under Voltage
Programming and Measurement, Rated Voltage Vout.
Verifying Voltage Programming and Measurement Accuracy is complete
Constant Voltage Tests
5
CV Load Regulation
Connection
Fig.2
L
N
G
AC Power Source
2260B
L
N
＋
－
＋
－
V
Electronic DC Load
Precision
Current Shunt
A
＋
－
+V
-V
+S
-S
Background
This test measures the change in output voltage resulting
from a change in output current from full load to no load.
Procedure
1. Turn off the power supply and connect the DVM from
the PCS-1000 and an electronic load as shown in the fig.
2 connection.
2. Turn on the power supply and program the output
current to its maximum programmable value (Imax)
and the output voltage to its full scale value.
3. Set the electronic load for the output's full-scale
current. The CV indicator on the front panel must be
on. If it is not, adjust the load so that the output current
drops slightly.
4. Record the output voltage reading from the DVM.
5. Open the load and record the voltage reading from the
DVM again. The difference between the DVM readings
in steps 4 and 5 is the load effect, which should not
exceed the value listed in the test record form for the
appropriate model under CV Load Regulation.
Verifying CV Load Regulation is complete
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