Me GSV-2MSD-DI User manual
GSV-2MSD-DI Data Logger
Instruction manual
Version: 26/08/2015
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Contents
GSV-2MSD-DI Strain gage Data Logger.............................................................................................4
Connection and commissioning.....................................................................................................4
Operating the menu..........................................................................................................................4
Logger menu.................................................................................................................................4
Description of the logger menu:.................................................................................................5
Notes..........................................................................................................................................6
Measuring amplifier menu..........................................................................................................6
Description of the measuring amplifier menu....................................................................7
Notes..........................................................................................................................................8
Description of the buttons...............................................................................................................9
Number setting..................................................................................................................................9
Description of LEDs........................................................................................................................10
Maximum, minimum and mean value........................................................................................10
Recording measured data to file..................................................................................................11
USB operation..................................................................................................................................12
Power supply per USB connection...............................................................................................12
USB driver.........................................................................................................................................12
Driver installation........................................................................................................................13
Interface number / Determine COM-Port...............................................................................14
Dimensions.......................................................................................................................................17
Terminal assignment......................................................................................................................18
Connection plan for DMS bridges................................................................................................19
Technical data ................................................................................................................................20
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GSV-2MSD-DI Strain gage Data Logger
Connection and commissioning
To switch on, press the MODE button until the display is illuminated.
The device contains a battery that is charged by connecting the power adapter supplied.
The “ON” LED flashes while charging.
To switch off, hold the MODE button (outside the menu) down and confirm the following
message “Power off? (OK)“ by pressing the OK button.
Please use SDHC Memory Cards, class 6 or class 10, but no UHS 2.
Operating the menu
The device has two main menus:
Logger menu.
The logger menu has the following functions:
•View and set data recording mode on the SD memory card,
•Select USB connection mode,
•Select display illumination characteristics,
•Display battery life,
•Set date and time,
•Select additional functions e.g. display and recording of maximum, minimum and average
measured values.
The Logger menu can be reached by pressing the MODE button from the measured value
display or via the last entry of the measuring amplifier main menu.
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Description of the logger menu:
Menu entry Level
1
Menu entry Level 2 Menu entry Level 3
Logging
ON, OFF, onOK
➔Set Log.: ON Permanent recording of measured data
on the SD card
➔Set Log: onOK Recording of measured data on the SD
card as long as the OK button (at measured value
displayed) is pressed
➔Set Log: OFF No Recording
USBmode:
Comm, SDcard,
none
➔USBmode: SDcard The device is a Mass Storage
Device when connected to the USB port, which provides
access to the data on the SD card. Simultaneous
recording of measured value to file is not possible. If
this mode is activated, recording is switched off.
➔USBmode: Comm The device is in serial USB mode.
Our communication programs (e.g. GSVcontrol,
GSVmulti) can then be used. A standard driver is loaded
when connected for the first time, see below
➔USBmode: none USB is switched off.
Bat: level bar or
Charge (with
percentage
display)
➔USB power: ON, OFF
If power supply is via USB port is enabled, the GSV-
2MSD-DI can be supplied by the USB bus if it is
connected to a PC and configured as an USB device. If
the device is switched off, the battery can be charged.
➔Set: USBpwr ON
➔Set USBpwr OFF
Switch power supply
via USB on or off
Light
ON, Auto
➔Set: Light ON Display is permanently illuminated
➔Set: Light Auto Display is illuminated when buttons are
pressed and in the menu and goes out after 5 seconds -
this preserves the battery.
date / time ➔Date TT Mon JJJJ ➔Setting the date
➔Time HH:MM:SS ➔Setting the time
➔(see description of
numeric settings
below)
Val.mode
normal, MaxMin
➔SetMode: normal: Only displays the current measured
values
➔SetMode: MaxMin:The maximum, minimum or mean
value can be displayed in the display and all three are
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Menu entry Level
1
Menu entry Level 2 Menu entry Level 3
recorded to file.
Menu entry Level 1 Menu entry Level 2 Menu entry Level 3 Menu entry Level 4
Logging options ➔Row elements ➔With date: Yes/No ➔With […] Yes/No
i e switching to the
setting not yet selected
➔With time: Yes/No
➔With unit: Yes/No
➔File options ➔heade: Yes/No
➔Number of lines ➔Setting the max
number of lines in a
file
➔Length of time ➔Setting the max
duration of the file
➔Directory ➔Every month
➔Every day
otes
•If a setting is in brackets in Level 1, this means that this setting has been selected
but is not currently active. This is the case if the conditions for this operating mode
are not met. Example:
•Logging (on): SD card is not inserted or write-protected or full or defective.
•USBmode: (SDcard): USB cable is not connected or no SD card is inserted
Measuring amplifier menu
The measuring amplifier menu is used to set the parameters of the measuring amplifier, for
example:
•Sensor scaling factor
•Unit
•User-definable offset
•Parameter memory
The measuring amplifier main menu can be reached by pressing the MENU button from the
measured value display.
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Description of the measuring amplifier menu
Menu entry Level
1
Menu entry Level 2 Menu entry Level 3
Sensor config. ➔unit
➔Sensor capacity
➔Rated output
Select unit1
Numeric setting of the physical nominal value of
the sensor.2
Numeric setting of the electrical characteristic
value of the sensor.²
Strain analysis ➔Set gage factor
➔Set bridge type
➔Numeric setting of the K-factor between 0.2
and 2583
➔Full bridge: Full bridge circuit with 4 individual
DMS, all in longitudinal direction³
➔Half bridge: Half bridge circuit with 2 individual
DMS, both in longitudinal direction³
➔Quarter bridge: Quarter bridge circuit with one
DMS³
➔PR.full bridge: Full bridge circuit with 4
individual DMS, 2 in longitudinal direction and 2
in cross direction³
➔PR.half bridge: Half bridge circuit with 2
individual DMS, one in longitudinal direction and
one in cross direction³
Menu entry Level 4
Poissons ratio(only with selection of cross-
direction full bridge or cross-direction half bridge
in Level 3) Numerical value from 0 to 0.5.³
Load settings ➔default: Manufacturer’s
settings i.e. restoring
GSV-2 parameters to
default settings.
➔user 1: User-
configurable data set
no.1 i.e. loading the
parameters that were
1 Changing the unit does not change the measured value scaling!
2 Modification of the sensor measurement range or the characteristic value changes the scaling of the
measured value.
3 Modification of the DMS parameter of the strain analysis changes the scaling of the measured value and
the unit.
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Menu entry Level
1
Menu entry Level 2 Menu entry Level 3
previously filed as user 1
with save settings.
➔...and so on, until
➔user 6: like user 1, but
No 6
Save settings Saves the current
configuration under user 1
to user 6
Set scaling Numerical value between
0.1 ...999999
Data acquisition1➔Data frequency
➔Data period
Numerical value: Num. Of values per second
Numerical value: Data period of acquired values
Note: the last confirmed with OK value is
adopted. Please confirm data period for slow
measurements, data rate for fast
measurements.
Options ➔Set channel (Set channel)
➔Set threshold (Set
threshold)
➔Offset value
➔Language 1
Numerical value 0 or 1
➔On-threshold Numerical value of the switch-on
threshold
➔Off-threshold Numerical value of the switch-off
threshold
➔Value that is added to each measured value.
➔German or English (Menu language setting)
Logger config. See logger menu.
- Press the Menu button to go back one level.
- Press the OK button to confirm an entry or to go to the next level.
- If a setting is selected with the OK button, the following message will appear “OK to
confirm“, which you can confirm by pressing OK to approve the setting - or cancel by
pressing the MENU button.
1 This menu entry is available from firmware version 1.5.08 on.
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otes
•The symbol on the right edge of the display indicates that the menu entry is
activated.
•Access to the measuring amplifier menu will be blocked if communication is taking
place via the serial interface. In this case, the following is displayed:
“Menu blocked”
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Description of the buttons
Button Function
MODE To switch on and off or access the Logger menu
MENU
(LEFT)
To access the measuring amplifier menu, to go one menu level higher or to cancel an
entry.
For numeric settings: to move the cursor left.
UP To move around the menu within the same level: switching to the next entry.
For measured value mode=MaxMin: to switch from one measured value display to
the next one up.
For numeric settings: to increase number and/or setting above the cursor.
DOWN To move around the menu within the same level: switching to the previous entry.
For measured value mode=MaxMin: To switch from one measured value display to
the next one down.
For numeric settings: to decrease number and/or setting above the cursor.
OK
(RIGHT)
To confirm the entry or move down one level.
For measured value display and recording mode “withOK”: to record measured values
to file.
For numeric settings: to move the cursor right.
SHORT To connect the +Ud and -Ud inputs (short-circuit of sensor signal)
ZERO To trigger an automatic zero adjustment.
umber setting
To set a numerical value and the date or time, move the cursor right by pressing OK and left
by pressing MENU. The digit (and/or the month) above the cursor flashes and can be
increased or decreased using the UP / DOWN buttons.
For the setting to take effect, the OK button must be held down until the whole number
flashes.
Then release the OK button, and the following message will appear “OK to confirm“.
Confirm this by pressing OK. To cancel the numeric setting, hold down the MENU button.
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Description of LEDs
LED Meaning
ON Permanently on: Device on, no charging. Flashing slowly: Device off, battery charging.
Flashing faster: Device on, battery charging.
CARD USB mass storage device active.
COM USB serial communication mode active.
LOG Measured data recording to SD card active. Do not remove card!
ERR An error has occurred. Flashes permanently after switching on: the battery was
empty, therefore the date and time must be reset. Flashes alternately with ON after
switching on for approximately 3 seconds: the battery is empty, please connect
power adapter to charge. Flashes alternately with LOG: an error occurred whilst
attempting to record measured data e.g. the SD card may be write protected, full,
incompatible or defective.
Maximum, minimum and mean value
The maximum, minimum and mean value mode can be activated in the logger menu under
Val. mode. In this operating mode you can switch between these values and the current
value in the display using the UP and DOWN buttons. These values are written in every line
in the measured value file; in the order:
Current value, maximum, minimum and mean value.
If activated, a header is written in the file, the second line of which designates the
corresponding column:
Scaling: +3,5000 Data frequency: 10,000 Hz
Date Time Value Max Min Mean Unit
13 05 03,15:38:31.99960 -0.0004 +2.9967 -3.0084 -0.0468 mV V
The header is only written when Recording options File options Header:→ → Yes is selected
in the menu.
In this operating mode, the maximum measured data rate for file recording is 1000
measured values/s.
The following actions reset the determination of the maximum, minimum and mean value,
i.e. then re-determined with the subsequent measured values:
- By switching on the device
- By activating max./min./mean value mode
- By zero setting
- By starting permanent file recording
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- By ending manual file recording, i.e. by releasing the OK button
Recording measured data to file
If data recording is active, the GSV-2MSD-DI creates directories on the SD card, which
contain the measured data files.
The directory name is created from the current date, depending on the directory mode
setting. A new directory is created every month in the initial state, with the name:
G20JJ_MM, for example in November 2012 this would be "G2012_11".
The name of the files within it are then formed based on the day and time, i.e.:
DDHHMMSS.TXT. For example, if a file is created on 14.11.2012 at 14:41:39, then the
directory name is as above and the file name:
14144139.TXT
The files are written in ASCII text format. Each measured value creates a line that is
terminated with <LF> and <CR>. Depending on the line settings, each line begins with the
time stamp consisting of date, time and fractions of seconds, then the measured value and
the unit. The default setting for lines is as follows (first line of the example above):
12/11/14,14:41:39.27669 -0.0011 mV/V
12/11/14,14:41:39.37669 -0.0011 mV/V
The date format satisfies the big-endian convention, i.e.
JJ/MM/DD
Date and time are separated by comma. The time format is
HH:MM:SS.bbbbb
whereby the 5-digit fractions of seconds bbbbb, interpreted as a whole number, indicate
10µs steps. In the example above, the data rate of the measuring amplifier is set to 10
measured values/seconds ( ( 37669 - 27669) * 10µs = 100ms = 1/10 s).1
Time stamp and measured value are separated with the tab character (‘/t’). Measured value
and unit are separated with a space.
The default setting for the maximum number of lines (i.e. displayed measured values) in a
file is 32,000. As soon as this number is reached, a new file is opened.
In the “onOK” recording mode, whereby recording are only made by pressing the OK button,
the data sets (continuous lines during a recording) are written in the same file. After
1For synchronisation reasons, there can be small deviations in the fractions of the time steps.
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terminating a data set, i.e. by releasing the OK button, the maximum number of lines is
tested. If this is larger than or equal to 32000, a new file is opened. Therefore the number of
lines can also be larger than 32000 in this mode.
In this mode at least one line, i.e. one measured value, is written per data set. If you always
want exactly one measured value per data set, it is recommended that the data rate of the
measuring amplifier is set to a low value e.g. 1 measured value/second using
communication software (e.g. GSV control). By pressing OK, the device waits until a value
is measured at records this value.
USB operation
The USB operating mode can be selected in the logger menu at any time (see above),
regardless of whether the condition(s) for this operating mode are currently met or not -
see note above. In the latter case, the setting will be displayed in brackets in menu Level 1,
and with an unchecked box instead of a checked box in menu Level 2.
If a USB operating mode is currently active (i.e. the USB cable is connected to a PC) and the
other is selected, the current operating mode is switched off and the new mode is activated
after 5 seconds. If the host PC is equipped with speakers, you will hear the corresponding
acoustic signal.
If the USB operating mode “SDcard” is selected and one of the recording modes is selected
at the same time, the recording will be switched off.
In this Mass Storage mode, files on the SD card can be read, written, deleted or formatted.
Power supply per USB connection
If the USB power supply “USB Power” is activated in the logger menu, the device can also
be powered via the USB port if it is connected to a host PC and fully configured. The battery
is emptied barely or not at all when switched on. When the device is switched off, the
battery can be charged by the host PC. In this state, the device is then an SD card reader,
irrespective of the set USB mode.1 A USB charging device cannot be used at this time.
USB driver
The USB Mass Storage mode does not need a driver for Windows systems from Windows
XP - once the USB cable is connected a window will appear (depending on operating
system settings), where you can access the files; or you can reach the GSV-2MSD-DI drive
via “My computer” or with the Windows explorer.
1 This is necessary as the device requires 500mA and according to USB 2.0 specification, this is only
permitted in completely configured (enumerated) communication mode.
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Driver installation
When the device is connected in Communication mode for the first time, Windows will ask
for a driver directory. The installation process is described below.
This must first be defined for your GSV-2MSD-DI
to work in USB communication mode.
To do this, click the MODE button of the
measuring amplifier and select USBmode:
Comm in the logger menu.
Now you can connect your GSV-2MSD-DI to the
PC via USB cable. Once connected the driver
installation window appears.
Select “Install software from a list or specific
source (advanced users)”.
Click “Continue >”.
Click “Search for the best driver in these
locations”
Check the option
“Include this location in the search:”
and then click “Browse”.
Select the following link of the CD supplied:
[CD]:\setup\driver\usb\GSV2MSD_Com_Driver
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[CD] corresponds to your disk letters.
Click “Continue >”.
In the dialogue window
“Hardware installation”
click “Continue installation”.
The driver was installed successfully.
Click “Finish”.
Interface number / Determine COM-Port
If the driver is installed successfully, it is useful to know the number of the virtual COMport
assigned by Windows so that this can be specified to the communication program to allow
it to open the interfaces. Proceed as follows:
Right-click on “Workstation”.
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Select “Properties” in the context menu..
Click on the “Hardware” tab in the “System
properties” window displayed.
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Click on the “Device Manager” button.
In Device Manager, click on the plus sign next to
“Connection (COM and LPT)” to display the
connection overview.
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Look for the title
"GSV-2MSD-DI USB communication
(COM<Number>)", whereby <Number> indicates
the number of the COMport that you are looking
for. You need this COM-Port number to use the
GSV-2MSD-DI, for example under GSV-Control.
Dimensions
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Terminal assignment
1 Screen
2 GNDAGround analogue input
7 Tare Zero-setting input / Trigger input
9 UEAnalogue input
10 UAAnalogue output
6 +USPositive bridge power supply
5 -USNegative bridge power supply (GND)
8 +UDPositive differential input
15 -UDNegative differential input
13 +UFPositive sensor cable
12 -UFNegative sensor cable
14 HB Half Bridge selector
11 QB120
Ohm
Bridge Completition Resistor 120 ohm
3 QB350
Ohm
Additional quarter bridge 350 ohm
4 QB1000
Ohm
Additional quarter bridge 1000 ohm
Pin 14 must be bridged with Pin
15 to connect half and quarter
bridges.
Quarter bridge are connected in
three-wire connection to Pin 5,
Pin 8 and QB (3 and/or 11 or 4)
Table 1: Allocation Sub-D 15 socket
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8
19
15
Connection plan for DMS bridges
Full bridge Half bridge Quarter bridge
No bridge Bridge between 14 and 15 Bridge between 14 and 15
Table : Connection of full and/or half and quarter bridges to 15 -pin ub D socket
The following are supplied as standard accessories:
Switching power supply 100..240V /18V 1.67A
15-pin Sub-D mating connector,
SD memory card,
USB cable
Software CD
Instruction manual
Required accessories:
Class 10 (recommended for recordings of 1000Hz)
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Us
Ud
R1
R2 R3
6
5
15
R4
15-pole Sub-D
8
1Shield
Us
Ud
R1
R2 R3
6
5
15
R4
15-pole Sub-D
8
1Shield
6
5
14
Us
Ud
R1
R2 R3
R4
6
14
8
QB
5
15
5
15-pole Sub D
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