Welcome to Keysight 34450A 5.5 Digit Multimeter How To Video.
In this short video, I will show you how you can set the 34450A to perform data logging and import the logged data to your computer.
The data logger feature provides a front- panel interface that allows you to perform data logging into the instrument’s non- volatile memory.
I have the Agilent 33250A Function Generator that is set to output a ramp signal to simulate a test condition.
On the 34450A, I have set the multimeter to 10 V DCV range at fast mode.
Now, let set the 34450A to perform the data logging.
First, press DATA LOG button to enter the data log menu.
The trigger delay sets the delay interval between the triggers.
The sample interval sets a sample interval for timed sampling when the sample count is greater than one.
The default value for DCV measurement in fast mode is 69 ms. I will leave it as it is for this demo.
The sample count lets you select the number of readings or samples the meter will take per trigger. In this demo, I will take 40 samples.
The trigger count lets you set the number of triggers that will be accepted by the meter before returning to the "idle" trigger state. I will do a 1 trigger in this demo.
Enable data logging by pressing the SHIFT button twice.
The 34450A can be triggered by pressing the TRIG button or simply supply a trigger signal to the serial connector(RS232) at its rear panel.
For this demo, I will use the TRIG button to start the data logging.
Once the TRIG button is pressed, the 34450A will start sampling and logging the values.
As you can see on the OLED display, the multimeter is in the progress of logging the values.
Notice that the annunciator has disappeared. This indicates that the data logging has completed.
To view the logged data, press SHIFT follow by the DATA LOG button.
You can view the log info such as the number of records, primary and secondary function and range.
Next, the log list shows the list of values logged into the non-volatile memory.
Press SHIFT to find a specific logged data and let’s say if you are interested in data number 20.
Press SHIFT and it will bring you to the specific data.
If you are interested on the distribution of the logged data, you can go to log histogram to view the histogram chart.
This is a great feature that lets you instantly know the frequency of occurrence in the measurement range that you have set.
The log statistics displays the maximum, minimum and average values along with standard deviation and number of overloaded sample.
Next, I will show you how to import the logged data into your computer.
I have created a simple program in Agilent VEE Pro that will import the logged data from the non-volatile memory into my computer. This is how it is done.
First, I set up the VEE Pro program to recognize my 34450A.
Then I use the “Data:Points? NVMEM” command to query the number of samples available in the non-volatile memory.
Next, I use the “DATA:DATA? NVMEM” to read all the data stored in the non- volatile memory to my computer
After I run the program, I will get the number of samples available and their values here. It's a ramp signal as expected from the 33250A function generator.
The data logging function in the 34450A is extremely powerful
It can log up to 14 hours or from 5000 readings up to 50000 readings when you purchase the upgrade 3445MEMU
No complicated programmings are needed and at the end of the logging,
You can view values, histogram and statistic data on the OLED display
You can also transfer logged data over GPIB, USB or serial port to your computer
I hope you have learnt how to set up the 34450A to perform data logging through this video
For more information on the Agilent 34450A 5.5 Digit Multimeter, please visit www.keysight.com/find/34450A