Keithley SourceMeter 2410 - Models 2425 and 2430 Sourcemeters

2400 Series SourceMeter
®
User’s Manual Source-Measure Concepts 6-9
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
OUT
|) - (V
OUT
× I
OUT
)] × 0.7 × DC} + T
AMB
≤ 100
and
{[30 + (|I
OUT
| × 40 × DC)] × 0.35} + T
AMB
≤ 85
100V range power equations:
{[(100 × |I
OUT
|) - (V
OUT
× I
OUT
)] × 0.7 × DC} + T
AMB
≤ 100
and
{[30 + (|I
OUT
| × 125 × DC)] × 0.35} + T
AMB
≤ 85
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
OUT
|) - (V
OUT
× I
OUT
)] × 0.7 × DC} + T
AMB
≤ 100
and
{[30 + (|I
OUT
| × 24 × DC)] × 0.35} + T
AMB
≤ 85
40V range power equations:
{[(58 × |I
OUT
|) - (V
OUT
× I
OUT
)] × 0.7 × DC} + T
AMB
≤ 100
and
{[30 + (|I
OUT
| × 120 × DC)] × 0.35} + T
AMB
≤ 85
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