Keithley 2520INT, Быстрый старт

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Model 2520INT Quick Start Guide Getting Started 2-7
Programming example
Table 2-2 summarizes the commands for the 2520INT connected to Detector 1. These
commands set up the Model 2520 as follows:
• Measurement range: 10mA
• Bias Voltage: -5V
• Measurement polarity: Positive
CAUTION Applying voltage greater than -5V or .5V can damage the
Model 2520INT.
Detector dark current measurements
Description
The dark current is a current offset produced by the detector in the absence of light. Its
value is based on many factors including the reverse bias voltage on the detector, tempera-
ture, semiconductor architecture, and even the quality of the semiconductor material itself.
Proper measurement of and compensation for the dark current will ensure accurate optical
power measurements.
Table 2-1
Remote voltage bias and detector polarity measurement commands to bias 2520INT
Command Description
:SOURce2:VOLTage <voltage> Set detector #1 source voltage (0 to ±20).
:SOURce3:VOLTage <voltage> Set detector #2 source voltage (0 to ±20).
:SENSe2:CURRent:RANGe <range> Set detector #1 measure range (0.01, 0.02, 0.05, 0.1).
:SENSe2:CURRent:POLarity <polarity> Set detector #1 measure polarity.
:SENSe3:CURRent:RANGe <range> Set detector #2 measure range (0.01, 0.02, 0.05, 0.1).
:SENSe3:CURRent:POLarity <polarity> Set detector #2 measure polarity.
Table 2-2
Command summary for 2520INT connected to Detector 1
Command Description
:SENS2:CURR:RANG 0.01 Detector 1 measurement range at 10mA
:SENS2:CURR:POL POS Detector 1 measurement polarity positive
:SOUR2:VOLT –5 Detector 1 bias = -5V