Models 2425 And 2430 Sourcemeters - Keithley SourceMeter 2400 User Manual

®
2400 Series SourceMeter User's Manual

Models 2425 and 2430 SourceMeters

There are two equations for each of the high power ranges (20V, 3A and 100V, 1A). Both
of the equations for the selected voltage range must be true to ensure that the SourceMeter
will not overheat. The result of the first equation must be ≤100, and the result of the sec-
ond equation must be ≤85.
NOTE For the lower power ranges, the following equations will always be true.
20V, 3A range power equations:
{[(33 × |I
|) - (V
OUT
and
| × 40 × DC)] × 0.35} + T
{[30 + (|I
OUT
100V range power equations:
{[(100 × |I
|) - (V
OUT
and
| × 125 × DC)] × 0.35} + T
{[30 + (|I
OUT
Model 2440 SourceMeter
There are two equations for each of the high power voltage ranges (10V and 40V). Both of
the equations for the selected voltage range must be true to ensure that the SourceMeter
will not overheat. The result of the first equation must be ≤100, and the result of the sec-
ond equation must be ≤85.
10V range power equations:
{[(21 × |I
|) - (V
OUT
and
| × 24 × DC)] × 0.35} + T
{[30 + (|I
OUT
40V range power equations:
{[(58 × |I
|) - (V
OUT
and
| × 120 × DC)] × 0.35} + T
{[30 + (|I
OUT
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Source-Measure Concepts
× I )] × 0.7 × DC} + T ≤ 100
OUT OUT AMB
≤ 85
AMB
× I )] × 0.7 × DC} + T ≤ 100
OUT OUT AMB
≤ 85
AMB
× I )] × 0.7 × DC} + T ≤ 100
OUT OUT AMB
≤ 85
AMB
× I )] × 0.7 × DC} + T ≤ 100
OUT OUT AMB
≤ 85
AMB
6-9