Compact Instruments MINIVLS313 User manual

14410 Iss 1.0
MINIVLS313 USB TACHO SENSOR
INSTRUCTIONS
© Compact Instruments Ltd
September 2017
www.compactinstruments.co.uk

1
GENERAL FEATURES:
The MiniVLS313 USB Tacho Sensor is the first pocket laser tachometer developed to
operate on the android smartphone (USB-OTG supported) with a data save function for a
smartphone and tablet. Primarily designed for speed related applications, including high-
speed monitoring and are widely used for research, development and test applications.
KEY FEATURES:
Pocket Sized Instrument:
The size of USB-Tacho is a small and compact handheld tachometer, at just 20mm x 65mm.
Data Save:
All the measured data can be saved to a smartphone or tablet for later use.
Sampling Timebase Option:
From 0.1s to 5s sampling time can be chosen based on measurement requirement.
No Batteries are Required:
The Sensor is powered by the smartphone and tablet, no batteries are required to operate
the Sensor
Multiple Units Option:
Different measuring units can be chosen including rps, rpm, meter/minute etc.
Diameter Setting:
The diameter can be adjusted depending on measured wheel for linear speed
measurement without the need of a contact adapter.
SPECIFICATIONS:
Optical laser range
50mm - 2000mm
Light Source
Red Laser Class II 635nm
Optical angle
± 80 degrees
Speed measurement range
3 - 99,999 rpm
Accuracy
0.01% of reading +/- 1 digit
Resolution
0.001 RPM
Operating Temperature
0 to + 50 degree
Baud rate
115200
Connector
Mini USB
Time base
0.1s to 5s (adjustable)
Cables
Several options
Dimensions
20mm (W) x 65mm (L)

2
STANDARD PACKAGE:
pack of reflective tape, male micro to female USB 2.0 adapter, male Type-C to female USB
2.0 adapter, mini male to male USB 2.0, and instructions.
INSTRUCTION FOR USE:
1. Attach small reflective target to machine shaft (typically 6mm x 25mm)
2. connect sensor with smartphone by using supplied cable, start tacho app and
press start button, point to measured target.
OPERATION OF APP:
IN MEASUREMENT SETTING, THERE ARE THREE OPTIONS:
For unit display, RPM, RPS, M/MIN, M/SEC, FT/MIN, FT/SEC can be chosen
For sampling timebase option, different time interval can be chosen. For example, if 0.1s
selected, the tacho sensor will calculate the speed over around 0.1s, and then send it to
smartphone. if 5s selected, the tacho sensor will calculate the speed reading over around
5s, and then send it to smartphone.
For diameter (mm) setting, when unit display is M/MIN, M/SEC, FT/MIN, FT/SEC, then
diameter need to be known, the default value is 32 mm, the value can be adjusted
according to targeted wheel.
For data file management, you could create a data file to save data. Only following
characters are allowed in the name of data file: "0,1,2,3,4,5,6,7,8, 9, abcdefghijkl
mnopqrstuvwxyz,-,@,_,#,$,%,(,)"
If no data file exits, the data file will be automatically created when data need to be saved.
The name of automatically created file will be the time when it is created.
You also could choose which existing file want to save through select file button, you could
delete data file through delete button, and you could email your data file through third
party software.
All the data files are saved in Tacho_data folder.
All the data saved will be in unit of RPM.

3
USE WITHOUT REFLECTIVE TAPE:
Under controlled conditions reflective tape may not be required. If there is an existing
difference in reflectivity on part of the object to be monitored then this may be used e.g.
keyways and slots in bright shafts, spokes of a wheel, fan blades etc. If there is more than
one target per revolution of the shaft then the resulting reading must be divided by the
number of targets to obtain the correct reading. In the case of multiple targets these must
be equally spaced around the shaft or disc or jitter will occur in the measured value, this
effect is most apparent at slow speeds. On bright shafts, it is possible to paint a black non-
reflective segment and conversely on non-reflective shafts a white mark can be painted.
DOWNLOAD FREE ANDROID APP:
App name in Google play store: Compact instruments tachometer
https://play.google.com/store/apps/details?id=com.compact.zhong.myapplication
Compact Instruments Ltd
www.compactinstruments.co.uk
Phone: [phone]
Fax: [phone]
Address: 61-65 Lever Street, Bolton,
Lancashire, BL3 2AB, United Kingdom