Keithley 2600a series User Manual

4-4 Return to Section Topics 2600AS-901-01 Rev. B / September 2008
Section 4: Source-Measure Concepts Series 2600A System SourceMeter® Instruments Reference Manual
General SourceMeter instrument power equation
P
CS
= The maximum power generated in a SourceMeter instrument channel that can be properly
dissipated by the SourceMeter instrument cooling system.
T
AMB
= The ambient temperature of the SourceMeter instrument operating environment.
P
DER
= T
AMB
- 30
• This factor represents the number of watts the SourceMeter instrument is de-rated
when operating in environments above 30°C. This is represented as a temperature
because the maximum output power of each SourceMeter instrument channel is
reduced by 1W per degree C above 30°C.
•P
DER
is 0 when the ambient temperature is below 30°C.
V
OA
= The SourceMeter instrument output amplifier voltage. This constant can be found in the
tables below.
V
P
= The voltage level the SourceMeter instrument is attempting to force while at the pulse level.
• When operating in quadrants 1 or 3 (sourcing power), the sign of this voltage must
be positive when used in the power equations.
• When operating in quadrants 2 or 4 (sinking power), the sign of this voltage must be
negative when used in the power equations.
V
B
= The voltage level the SourceMeter instrument is attempting to force while at the bias level.
• When operating in quadrants 1 or 3 (sourcing power), the sign of this voltage must
be positive when used in the power equations.
• When operating in quadrants 2 or 4 (sinking power), the sign of this voltage must be
negative when used in the power equations.
I
P
= The current flowing through the SourceMeter instrument channel while at the pulse level.
I
B
= The current flowing through the SourceMeter instrument channel while at the bias level.
Maximum duty cycle equation
1
NOTE When attempting to determine the maximum duty cycle where the off
state will be 0V or 0A:
•I
B
is 0
•I
P
and V
P
are the voltage and current levels when the
SourceMeter instrument is on.
1. Equations apply to both channels, sinking or sourcing power simultaneously. If a duty cycle less than 100% is required to avoid
overheating, the maximum on time must be less than 10 seconds
V
OA
V
P
–()I
P
()DC
MAX
V
OA
V
B
–()I
B
() P
CS
P
DER
–()≤+
DC
MAX
P
CS
P
DER
–()V
OA
V
B
–()V
B
()–
V
OA
V
P
–()I
P
()
-------------------------------------------------------------------------------------- 100×
2
≤

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English