4 Operating the Power System

Making Measurements

Each output channel has its own measurement capability. The output voltage and current is measured by acquiring a number of samples at the selected time interval, applying a window function to the samples, and averaging the samples.

The power-on and *RST time interval and number of samples settings yield a measurement time of 21 milliseconds per reading (1024 data points at 20.48 μs intervals). The output windowing function is Rectangular. Use the following commands to make a measurement:

Front Panel:

SCPI Command:

Select the Meter key.

To measure average voltage or current:

 

MEAS:VOLT?(@1:4)

 

MEAS:CURR?(@1:4)

Simultaneous Voltage and Current Measurements

Some models have simultaneous voltage and current measurement capability (Refer to Chapter 1, “Model Differences”). In this case BOTH voltage and current are acquired on any measurement, regardless of the parameter that is being measured. To return both values of a simultaneous measurement:

Front Panel:

SCPI Command:

Not available.

First, measure the output voltage (or

 

current):

 

MEAS:VOLT?(@1:4)

 

Then Fetch the other parameter:

 

FETC:CURR?(@1:4)

Measurement Ranges

Some models have multiple voltage and current measurement ranges. (Refer to Chapter 1, “Model Differences”). Selecting a lower measurement range provides greater measurement accuracy, provided the measurement does not exceed the range.

Front Panel:

SCPI Command:

Select Measure\Range.

SENS:CURR:RANG 0.1, (@1)

Select a range and press Select.

SENS:VOLT:RANG 5, (@1)

The maximum measurable current is the maximum rating of the range. If the measurement exceeds the range, an “Overload” error will occur. Examples of programming measurement ranges are:

3.06 A range

To select, program values > 0.1 A and ≤ 3.06 A.

0.10 A range

To select, program values > 200

μA and ≤ 0.1 A.

200 μA range (option 2UA) To select, program values ≤ 200

μA.

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Series N6700 User’s Guide

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Agilent Technologies N6700 manual Making Measurements, Simultaneous Voltage and Current Measurements, Measurement Ranges
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