Micro Detectors VBR Series User manual

1
Quick guide
VBR Series
www.microdetectors.com
MD Interface download area:
Host: 82.85.138.194
User: MDuserVBR
Password: MDvibrations
Port: 21

2
USB –Serial RS485 Adapter
To connect VBR sensor to a computer, it is possible to use any USB to Series converter, as for example US-324
Brainboxes.
-Install the driver US-324
-Check if the device is correcly installed
(1) Select PORT (COM e LPT)
/Brainboxes. With the mouse
right button select Property
(2) Advanced
(3) RS-485

3
Device choice
Select the device (Tab. 1) :
-VBR VBR series
-INC INC Series (not included in this guide)

4
Description:
TAB 1: Information regarding inclination and 3D position.
TAB 2: Information regarding the 3-axis acceleration and data post processing.
COM Port
Selection
Node Selection
Acceleration
Values
Toggle for
Data
Acquisition
Fast Fourier
Transform View
Reference
Axis for FFTY

5
TAB 3: Configuration.
TAB 4: Direct command serial configuration.
Sensor
Parameters
Upload from Sensor’s
Memory of Configuration
Parameters
Saving of Parameters
on Sensor’s Memory
Serial
commands
Section
Characters
Received
Command
Sent

6
Parameters configuration
1) Sensor node number assignment (default = 0). In case of more sensors on the same bus, each sensor must
have a different node number.
2) Minimum duration (in ms) of the acceleration that generate an alarm signal. 128 different levels can be
selected with a step of 2,5ms.
Es.: for an alarm activated only if its duration is ≥30 msec it is necessary to set the threshold level to 12:
30 msec / 2,5 msec = 12
3) Minimum threshold (in mg) of the acceleration that generate an alarm signal. Since 4 different levels of full
scale can be programmed (2g, 4g, 8g e 16g) and 128 levels can be selected , the resolution step is defined
in the following way:
2g 2000mg / 128 = 15,625 mg
4g 4000mg / 128 = 31,25 mg
8g 8000mg / 128 = 62,5 mg
16g 16000mg / 128 = 125 mg
Es for an alarm activated only if the threshold is ≥2g with a full scale of 4g:
2000 mg / (resolution @ 4g) = livello 2000 mg / 31,25mg = 64 ( decimal)
NOTE: RED led is activated when an alarm is detected.
4) Define the alarm transmission mode:
1
2
3
4
5
6
7
8
9
10

7
OFF no output alarm. RED led is no but no alarm signal is transmitted on analogue output or BUSRS485
ON485 alarm signal only on RS485
ON ANALOG alarm signal only on analogue output
ON485 + ANALOG alarm signal only on RS485 and on analogue output
5) Reference axes for the alarm
6) Analogue output configuration:
High impedance
Voltage analogue (0 … 5V or 0 … 10V)
Current analogue (4 …20mA, 0 … 20mA or 4 … 24m)
7) Full scale and resolution:
±2g 15,625 mg
±4g 31,25 mg
±8g 62,5 mg
±16g 125 mg
8) Analogue output mode:
NORMAL independently from the value of alarm transmission mode (point 4) the analogue output doesn’t transmit an alarm signal,
but just the values of the analogue output.
TOGGLING every alarm switch the analogue output from the minimum/maximum level to the maximum/minimum level.
IMPULSE every alarm switch the analogue output from minimum level to the maximum for at least 2,5ms.
9) Memory refresh
10) Configuration and parameterization saving.

8
Curves
1) X axis selection
2) Y axis selection
3) Z axis selection
NOTE: click with the mouse on the symbol to select: color, visibility, …
4) Record of the data transmitted on BUS RS485
5) FFT mode (WARNING: only for indication, not to be used for analysis)
6) FFT curve axis
7) Curves management: window, …
To clear the curve, click on the curve with mouse right button and press “Clear chart”.
In this menu, it is possible also to select the download of the data in an EXCEL file: “Export”“Export Data to Excel”