Keithley SourceMeter 2600 Series Reference Manual page 213

Series 2600 System SourceMeters Reference Manual
General SourceMeter power equation
(
V
OA
P
CS
T
AMB
T
DER
V =
OA
V =
P
V =
B
I =
P
I =
B
) I ( ) DC
V
–
P P MAX
= The maximum power generated in a SourceMeter channel that can be
properly dissipated by the SourceMeter cooling system.
= The ambient temperature of the SourceMeter operating environment.
= T - 30
AMB
• This factor represents the number of watts the SourceMeter is de-
rated when operating in environments above 30°C. This is
represented as a temperature because the maximum output power
of each SourceMeter channel is reduced by 1W per degree C
above 30°C.
• T is 0 when the ambient temperature is below 30°C.
DER
The SourceMeter output amplifier voltage. This constant can be found
in the tables below.
The voltage level the SourceMeter 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.
The voltage level the SourceMeter 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.
The current flowing through the SourceMeter channel while at the pulse
level.
The current flowing through the SourceMeter channel while at the bias
level.
Return to
( ) I ( ) ≤ (
V V
+ –
OA B B
Section 8 topics
Source-Measure Concepts
)
P T
–
CS DER
2600S-901-01 Rev. A / May 2006
8-7