Connecting Geophone To The Vibra; 4.1.4 Geophone Detection And Error Messages - Profound VIBRA Series Manual

Connecting geophone to the VIBRA

4.1.3
The geophone is connected to the VIBRA by pressing the cable plug into the GEOPHONE socket. It is
important that the plug is placed correctly into the socket. The red markers on both the plug (dot) and
socket (line) facilitate this.
Make sure to align both markers before sliding in the plug. The plug should then be inserted into the
socket until the "click" is felt. The plug is now latched into the socket and will not unlatch by vibration,
shock or pull on the cable.
When required, the plug is disengaged by a straight axial pull on the outer release sleeve. This first
disengages the latches and then withdraws the plug from the socket. Never try to disengage the plug by
pulling the cable.
You can check correct functioning by switching on the VIBRA, followed by selecting and activating Start
Measurement, see also the next paragraph 4.1.4.

4.1.4 Geophone detection and error messages

Once the option Start Measurement is chosen in the VIBRA's main menu, the system will try to connect
with the attached geophone. On the screen the following messages will be shown: Detecting Geophone,
followed by Checking Geophone, and finally Reading Electronic ID. If everything is ok, the geophone
serial number and the three measuring channels (X:, Y: and Z:) together with the message OK appear on
screen. The system will then start measuring and at the end of the first measurement interval the peak
values will appear on screen.
X! Y! Z! – no geophone ID
In case no digital geophone-ID is detected, the VIBRA will display an exclamation mark behind X, Y and Z.
The VIBRA will then start or continue the measurement with the default geophone ID-data, but will not take
the specific geophone ID-data into account. The data file will obviously not show the serial number of the
geophone. You can check this in the PC software, Start Measurement Info of the tab Saved Traces).
Therefore the measurement should be stopped as soon as possible and the connection between the
VIBRA and the geophone should be checked. Afterwards the measurement can be restarted.
Disconnected
If one or more measuring channels are not properly connected to the VIBRA, the system displays
Disconnected after the X, Y, and Z-channel.
In that case a mark is entered into the internal memory for each interval that no measurement could be
carried out. This also occurs when the geophone is disconnected (either by disengaging the geophone
plug or by breaking the geophone cable) during the measurement. This option provides the user with an
easy check to determine whether the VIBRA was able to carry out the measurements.
Please note that if you set a data save level, the memory of the VIBRA will be full earlier than expected
since the information of the non-connected channel cannot be screened and will be fully saved. See also
paragraph 5.3.2.
If the measurement has been started without connecting the geophone properly to the VIBRA, the above
Manual Profound VIBRA-series, version 2.00
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