Configuring Measurements; Optical Power - Keithley 2500 User Manual

Models 2500 and 2502 User's Manual
Configuring measurements
Follow the steps below to configure channel 1 or channel 2 measurement functions.
1. Press CONFIG then the MSR1 or MSR2 key to access the configuration menu for the
channel you are configuring.
2. From the displayed configuration menu, select the math function you wish to use on
that channel (I, I/V, V/I, MX + B, P , or P→), then press ENTER.
3. If you choose MX + B, configure the appropriate M (slope) and B (offset) parameters
for that function at the display prompts.
4. After configuring all parameters, press EXIT to return to normal display.

Optical power

The Model 2500 has a built-in function for converting photodiode current to optical
power.
1. Press CONFIG then MSR1 or MSR2 to select the configuration menu for channel 1 or
channel 2.
2. Select P→, then press ENTER.
3. At the prompt, enter the desired R (responsivity) value, then press ENTER.
4. At the prompt, enter the desired D (dark current), then press ENTER.
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Photodiode Measurements 4-3