380900-EN v3.1 07/13
10
Datalogging
The 380900 can store up to 10,708 records for both channels. These records can be transferred to a
PC for storing, viewing and plotting using the RS-232 interface cable and Windows® software
included. Data may also be stored directly into the PC using the software.
Note
: If a low battery condition is detected during datalogging, it will stop automatically.
Note
: Capacitance, frequency, duty cycle and logic functions cannot be recorded in the datalogging
or data acquisition modes.
Setting the Sampling Time
1. Hold the REC button and turn the power on. The top display will show the sampling rate in
seconds.
2.
To change the sampling time, press the RANGE button once to increment the sampling time by
1. The Sampling rate range is 0 to 253 seconds.
Note
: If the sampling time is set at 0 seconds,
the DMM will record one measurement and stop. For dual channel datalogging, sampling time
should be 2 seconds or greater.
3.
To increment the sampling time faster, hold the RANGE button for more than 2 seconds.
4. When approaching the desired sampling time, release the RANGE button and then increment
by 1 to reach the desired rate.
5.
Hold the REC button for 2 seconds to return to the DMM function.
Clearing Memory
There are three methods to clear the memory.
1. Hold the REC button and turn the power on. The memory will clear and the top display will
show the sampling rate in seconds.
2.
Press the “Clear Data Logger Memory” button in the software datalogger screen.
3.
Send a CNTL-C via the rs232 interface.
Start and Stop Datalogging
1.
Clear the memory before starting a datalogging session.
2.
Press the REC button to start datalogging. The LCD will show an REC symbol.
3.
To stop datalogging, press and hold the REC button until the REC symbol goes out.
4. To resume datalogging, press the REC button again.
Note
: If any function switches are
changed from their original position at the start of datalogging, an ERR will be displayed and
datalogging will not resume.
Note
: The Sample Rate should be set to 2 secs or greater for dual channel datalogging.
Windows® Data Acquisition and Datalogging Software
The supplied software is dedicated for use with the Extech Model 380900 Meter. The software displays
data as a Data List or as an X-Y Graph. Data is stored as a text file that can then be opened in
spreadsheet or other software programs Refer to the separate Software User Guide included on the
supplied program CD-ROM for software specific instructions.
