LaserPoint Plus 2 User manual

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 1
Quick Start Guide
Edition 01 –July 2014
Laserpoint srl - Via Burona, 51 - 20090 Vimodrone (Milano) - Italy
Phone [phone] - Fax [phone]-www.laserpoint.eu

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 2
1. Q UICK R EFERENCE
The Plus 2 is a portable and lightweight Power Meter designed to measure the optical
power/energy of lasers and other light sources.
It supports Laserpoint Thermopile Head Sensors and Laserpoint Photodiode Sensors. Laserpoint
products list is available at www.laserpoint.eu.
The Plus 2 is equipped with a 4.3” color touch screen display and an intuitive and ergonomic
Graphical User Interface (Figure 1), that makes all the features quickly available with just one or
two touches.
The Plus 2 offers also a configurable Analogue output, Data logging to USB memory stick, and a
USB powered and rechargeable lithium battery with a runtime up to 15hrs.
2. Q UICK S TART
2.1. T HE P LUS 2 D ISPLAY
As shown in Figure 1, the touch screen display of Plus 2 is divided in horizontal sections with a
specific content:
Figure 1
The touch screen display
a) Date - Time - Battery/network icons
b) Sensor Head name and Serial number; Sensor Head
temperature (°C)
c) Numerical 4 digits display and units of measure
d) Analog bar graph tailored on the selected full scale
e) This section is meant to display statistical elaboration
of measurement (if selected), a sample counter and
the elapsed time of statistics elaboration.
This area is also used for warnings and alarms/alert
messages
f) Area for displaying the duration of the data logging
and specific measurement settings
g) Four self-explanatory function buttons: Mode,
Wavelength, Range and Zero .
h) Four functional buttons: Save, Menu, Measure and
Statistic offer a quick access to specific sub-menus.
a
b
c
d
e
f
g
h

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 3
2.2. C ONNECTING THE HEAD TO THE P LUS 2
Insert the measuring head IIS
Connector (Intelligent Identification
System) into the socket marked "Head
Input" on the top panel of the Plus 2.
(Figure 2)
Figure 2
Top Panel View
2.3. S WITCHING ON / OFF THE P LUS 2:
Press the on-off button on the top panel (Figure 2) to switch on the Plus. The main screen will be
shown as in Figure 1.
Note:
The head must be plugged in before the unit is switched on. Otherwise the blinking writing "NO HEAD"
will appear and the Plus 2 will turn off in a few seconds (while in battery mode).
To turn off the Plus 2 press the on-off button for 2-3 seconds, then release it. The current Plus 2
configuration will be automatically saved.
2.4. S ETTING THE WAVELENGTH OF LASER BEING USED :
a) Touch the Wavelength button on the
screen of the Plus 2.
b) The “edit lambda”menu (Figure 3) will
be displayed.
c) Select a lambda from the list, or touch
“edit nm” to input the wavelength you need
(Figure 4). The wavelength must be within
the available range, that is shown on top of
the wavelength menu.
Figure 3 Figure 4
Note:
The wavelengths available, and the editable wavelength range depend on the Sensor head
characteristics and the Sensor head calibration.

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 4
2.5. C HOOSING MANUAL OR AUTOMATIC RANGING IN POWER MEASUREMENT :
Touch the Range button on the screen of the Plus 2 to scroll the different ranging
option.
Select the appropriate range manually, or choose the “Auto” mode to let the Plus 2
manage the range automatically.
2.6. O FFSETTING CURRENT READING :
You can activate the offset by touching the “Zero” button on the main screen of
the Plus 2.
When "offset" is activated, the button shows a yellow led and the offset value with
its unit of measure.
To cancel the offset, press "offset" again.
2.7. Z ERO A DJUSTMENTS
In the Plus 2, all adjustments, including ADC zeroing, are done by the software. It is
recommended to re-zero the Plus 2 each time the measuring head is changed.
a) Press for more than 3 seconds the Zero button
on the screen of the Plus 2.
b) After 3 seconds, the confirmation pop-up message
(Figure 5) will be displayed.
Note:
While zeroing make sure that the instrument is not affected by
electrical noise and the sensor is undisturbed.
c) Press “Yes” and wait few seconds while the “Wait
for zeroing” and “Zeroing Completed” messages are
displayed (Figure 6).
Figure 5
Figure 6

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 5
2.8. C HOOSING P OWER OR E NERGY MEASUREMENT :
Touch the “Mode”button to switch from the Power measurement to the Energy
measurement (shown units of measure depend on sensor and range being used).
While switching from Power mode to Energy mode if
the measured signal is greater than the energy
threshold, the Plus 2 will show the message "Zeroing
is necessary".
Press OK and follow the steps as described in the
“Zero adjustment” section.
Figure 7
Note: Energy Range is Manual
The energy mode only permit a manual range setting: so you need to press the "Range" button to
select the proper range.
2.9. M EASURING ENERGY OF A SINGLE PULSE OR BURST PULSE :
Set the Energy Mode as described above.
The green led near the measured value means that the Plus 2 is ready
to measure the energy pulse.
When firing the laser, the value display will turn blank, the LED will
turn red and the writing “Acquisition” will appear (Figure 9).
The “Acquisition” time usually takes from 1 to 5 seconds (depending
on the sensor head being used and the duration of pulse/burst fired).
After the acquisition, the measured energy will be displayed. The
green led will immediately show back: the Plus 2 is ready to measure
a new pulse (Figure 10).
Figure 8
In case you want to measure 2 or more
pulses, it’s enough to fire the pulses with
a pulse period shorter than 1 second
(pulse frequency > 1Hz).
In fact, at the end of the acquisition
process, the reading will be the sum of the
energies of individual pulses.
Figure 9 and 10

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 6
2.10. S ETTING THE ENERGY THRESHOLD
Since there is always some degree of noise or background radiation,
the instrument is designed not to respond to pulses below a preset
energy threshold. To set the energy Threshold:
a) While in energy mode, touch the button to open the
Measure Settings window.
b) Touch the Start threshold value to scroll and select the
“high”, ”med” or “low” value.
Figure 11
Note: how to choose Energy Threshold
The factory setting of energy threshold is "med" for medium.
If the unit triggers on noise, set the threshold to "high."
If you are measuring small energies and the unit does not trigger, set the threshold to "low."
2.11. M EASURING I RRADIANCE AND F LUENCE
a) Touch the button “Measure” to open “Measure
Settings”. Select the Shape of your beam and input the
requested dimensions (Radius for a circular shape, Width and
Height for rectangular shape), then close the menu.
b) Next measures in Power mode will be displayed as Irradiance
(unit of measure: W/cm2), while in Energy mode they’ll be
displayed as Fluence (unit of measure: J/cm2).
Figure 12
Note: to deactivate Irradiance/Fluence measures
Open the “Measure Setting” menu, and select the Shape “none” to deactivate.

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 7
2.12. S ETTING THE STATISTICAL ELABORATION OF MEASUREMENT
a) Touch the Statistics button on the screen of the Plus 2
and the Statistics window will be displayed (Figure 13).
b) Select one of the four processing options. The options are:
Off: no statistics.
Continuous: the data elaboration is done on a continuous
data collection basis.
Repeated: the data are repeatedly collected and elaborated
within a user’s defined time period.
Single: the data are collected and elaborated only once
within a user’s defined time period.
c) To confirm the selection, press the “Reset”button.
Figure 13
2.13. S ETTING D ATA LOGGING TO USB MEMORY STICK
a) Insert the USB memory key into the connector on the
left side of the Plus 2.
b) Touch the "Save…" button . The Data Logging
window will be displayed.
Figure 14
c) Select which data are to be saved: values, statistics or both.
d) Select the Sample Rate value: it must be between 0.5 - 99 s.
Note:
The sample rate value may refer to Values and Statistics (when
Continuous statistics is selected) or to Values only (when Single or
Repeated statistics is selected, because in these cases Statistics are
saved every time they are refreshed).
Figure 15
e) Select the acquisition mode:
-Manual acquisition: check this box to start and stop the acquisition manually
-Timed acquisition: uncheck “Manual acquisition” box and input the duration after which
the acquisition will be stopped.

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 8
f) Exit the Data Logging page by clicking on the “OK” button.
Note:
Depending on the USB flash memory speed, it may happen that the USB
drive is not yet ready. In this case a ”USB not ready” message will be
displayed, please wait few seconds until the message disappears.
g) The “Save..” button has now a “START”green writing.
Touch to begin logging data.
h) While the data logging is active, a timer showing the elapsed
time or the time left will be displayed. During data logging
the “Save..” button has a “STOP”yellow writing.
Touch to stop the data logging.
Note:
Data are saved in the USB drive, in the folder:
X:\PLUS2\”head serial number”\
with file names:
“DATA_nnn.txt”for values
“STAT_nnn.txt”for statistics
Figure 16 and 17
2.14. T HE “M ENU ” B UTTON
a) Touch the “Menu”button to open the Menu window.
b) The first menu lines are self-explicative: Date and Time
settings, Languages and Display Colour choices (not yet
available).
c) Display off: this is the inactivity time before the screen turns
off, to save energy. You can select ON/OFF to
activate/deactivate, and set a time from 1 to 30 minutes.
d) Auto off is the inactivity time before the Plus 2 will turn off.
You can select ON/OFF to activate/deactivate, and set a time
up to 600 minutes.
Figure 18
Note
both the “auto off” and “diplay off” work only when in battery mode. If plugged to the power line
the Plus 2 and the display will remain on.

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 9
e) Factory restore: this function resets measure, statistics and wavelength options of all the
power head that are or have been connected to the Plus 2.
f) 90° FullScreen: switch to a full screen high visibility / high contrast display (Figure 19)
showing only the measure digits and the unit of measure. Click the “X” button to return
to main screen.
Figure 19

LaserPoint s.r.l. -Plus 2 - Quick Start Guide - All Rights Reserved 10
3. P LUS 2 S PECIFICATIONS :
Detector Compatibility
Thermopile, photodiode, OEM
Input ranges
7 mV –700mV full scale, in 9 ranges
A to D Sampling rate
64 Hz
A to D resolution
23 bit ADC resolution, 16bit processing resolution
Electrical accuracy
± 0.5%
Electrical input noise level
500nV
Input Offset Voltage drift (typical): -4nV/°C
Dynamic range
8 decades
Analog output
0.025 - 2 Volt, with 16-bit (0.0015% resolution.)
Analog output accuracy
±0.1% ±2mV relative to display
Dimensions
170H x 100W x 36-50D (mm)
Mass
380 g
Display
4.3" TFT LCD, 480 x 272 resolution with resistive touch
panel, high luminance. (96H x 55W mm)
Display digit height
15mm -25mm Full Screen
Bargraph segments
250 pixel width
Battery
Rechargeable Li-Pol. 3.7V 3700mAh
Built in.
Battery charge time
7-8 hours if not operating
15-20 if operating
Battery runtime
> 9 hours
> 15 hours with stand-by display option
Supplied Charger
Input 100/240Vac 50/60Hz Out 5Vdc 1A,
Charging current is 0.5A (Plus 2 may be charged
through PC USB port).