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CHAPTER 3 Settings and Measurement
(5)-8 AC Line cycle
Select the frequency of the AC line used.
Selection item Description
50Hz For an area with a power supply frequency of 50 Hz
60Hz For an area with a power supply frequency of 60 Hz
In this setting, select a frequency for noise removal using the digital lter. Note that no noise in the power
supply can be removed if this setting is wrong. For the the sampling speed where this unit’s digital lter
becomes effective, refer to “(2)-1 Sampling interval”.
(5)-9 Add checksum to le
The checksum is used to check the consistency of the data le.
If the contents of the le are changed, checksum conrmation does not match the checksum, so you can
see that the le was changed.
The checksum function adds a checksum to the data le.
Selection item Description
Off The checksum is not added to the data le.
On The checksum is added to the data le.
* The checksum is also added to the backup le, ring / relay le, data save le.
For the checksum conrmation function, refer to "3.4 Setting Menus" - "(9) Data replay menu".
The checksum is available only for GBD format.
When saving a le with software etc, checksum does not match.
(5)-10 Date/Time
Makes settings related to the GL840 clock.
The internal clock (date and time) of the GL840 can be set.
(5) -11 Language
Set the display language (9 languages of Japanese, English (US), English (UK), French, German, Chinese,
Korean, Spanish and Russian).
(5)-12 Return to default settings
Returns all the settings to the factory defaults. When initialized, setting conditions to return to the factory
default settings.
In the operation settings, the settings other than the communication settings are reset to the factory default
settings.
In the communication settings, the communication settings set in the I/F menu are reset to the factory
default settings.
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