Opsytec UVpad User manual

UVpad
Manual
Version: 1.5.8
Opsytec Dr. Gröbel GmbH
Am Hardtwald 6-8
76275 Ettlingen
Tel.: 07243 / 94783 - 50
Fax: 07243 / 94 83 - 65
[e-mail]

1 Content 2
1 Content
1Content................................................................................................................................. 2
2Change history..................................................................................................................... 3
3Symbols Overview .............................................................................................................. 3
4Function Overview .............................................................................................................. 5
4.1 Quick start guide ....................................................................................................... 6
5Technical Data..................................................................................................................... 8
5.1 General technical data ............................................................................................... 8
5.2 Radiometric measurements ....................................................................................... 8
5.3 spectral ranges ........................................................................................................... 9
USB ........................................................................................................................... 9
5.4 / hardware-software-requirements............................................................................. 9
5.5 Effect related measurements ..................................................................................... 9
6Intended Use ...................................................................................................................... 10
7Conventional Use .............................................................................................................. 10
8Important Information ....................................................................................................... 11
9Operation ........................................................................................................................... 12
9.1 Switching the device on and off.............................................................................. 12
9.2 Standby Menu ......................................................................................................... 13
9.2.1 Start Measurement............................................................................................... 14
9.2.2 Show last Measurement....................................................................................... 16
9.2.3 Scope Measurement............................................................................................. 17
9.2.4 Settings ................................................................................................................ 18
9.2.5 Information .......................................................................................................... 19
9.3 Settings .................................................................................................................... 19
9.3.1 Sensitivity ............................................................................................................ 19
9.3.2 Effective Function* ............................................................................................. 21
9.3.3 Measurement delay.............................................................................................. 21
9.3.4 Language ............................................................................................................. 22
9.3.5 Date / Time .......................................................................................................... 22
9.3.6 Factory Settings ................................................................................................... 22
10 Data Export / PC Software ................................................................................................ 23
10.1 Installation............................................................................................................... 23
10.2 Connecting with the PC........................................................................................... 23
10.3 Viewer Software...................................................................................................... 24
10.4 Export of measurements.......................................................................................... 26
10.5 Displaying and comparing Measurements .............................................................. 27
10.6 Displaying the Irradiance profile............................................................................. 27
10.7 Deleting Measurements........................................................................................... 28
11 Notes for optimal measurement results ............................................................................. 29
11.1 The UVpad displays „MAX“ .................................................................................. 29
11.2 Set UVpad for high belt speeds............................................................................... 29
11.3 The UVpad displays too little irradiance values ..................................................... 30
11.4 The UVpad displays too high or too low UVC Values........................................... 30
11.5 The UVpad displays “ - “........................................................................................ 30
11.6 The measured value is not reproducible.................................................................. 31
12 Cleaning, Maintenance & Troubleshooting....................................................................... 32
12.1 Calibration............................................................................................................... 32
12.2 Cleaning .................................................................................................................. 32
12.3 Battery Change........................................................................................................ 33

2 Change history 3
12.4 Troubleshooting ...................................................................................................... 34
13 Declaration of Conformity................................................................................................. 35
14 Notes.................................................................................................................................. 36
2 Change history
Date
Version
Changed by
Comment
28.03.2012
1.4.0
Paravia
first Version
22.11.2013
1.5.4
Paravia
added saturation note
08.10.2014
1.5.5
Paravia
added LowGain
02.04.2015
1.5.6
Paravia
Software version 1.1.0, Firmware 1.0.4
23.03.2017
1.5.7
Uhl
Upgrade measurement time;
UVA/VIS range adjusted
Quick start guide
19.02.2018
1.5.8
Paravia
Editorial modifications
3 Symbols Overview
Meaning:
Failure to observe the mentioned instructions can re-
sult in an injury of the user.
Meaning:
Failure to observe the mentioned instructions can re-
sult in a damage of the device.
Meaning:
Instructions are to be observed for the regular opera-
tion.
*
Optional functions, not available for every UVpad

0 4

4 Function Overview 5
4 Function Overview
In the quality control of UV-varnishes, broadband radiometers and spectral radiometers are
used to monitor the lamp power and to adjust the system in an optimal way. However, broad-
band radiometers are only calibrated to one lamp type and differ in their sensitivity. Thus,
comparisons between the measurement instruments of different manufacturers, different lamps
(Hg, Ga, I,…) or UV-LEDs are not possible. By means of spectral radiometers, all UV-sources
can be measured and compared.
Here, the UVpad offers enormous application advantages compared to the common spectral
radiometers.
Not only is the UVpad the worlds flattest autonomic spectral radiometer, it also offers a high-
quality spectral measurement technology in a robust and easy to operate measurement device.
The UVpad enables wireless measurements in production and conveyor systems for all UV
processes. It measures the entire spectrum continuously and analyses the data in real-time. As a
result, the spectral range is evaluated and illustrated conforming to standards. Hereby, compar-
isons of different lamps are possible. By optionally provided photo initiator spectrums, UV
processes can also be optimized related to causes and effects. The UVpad offers these func-
tions/features:
Spectral measurements:
Real-time of the spectrum (scope measurement)
Radiometric measurements:
Spectrum at max irradiance
Irradiance (UVA, UVB, UVC, VIS)
Profile of irradiance
Dose of irradiance (UVA, UVB, UVC, VIS)
Measurements related to cause and effects:
Photo initiator spectrums (optional)
Sensitivity functions of broadband radiometers (optional)
Front panel
Rear panel

4 Function Overview 6
4.1 Quick start guide
This quick start guide is intended to explain the function of the UV pad by means of an operat-
ing procedure.
Step 1
Turn on the UV pad with any key on the front
panel. Press again to enter the main menu.
Step 2
For reproducible results, you should always
select a fixed integration time.
Therefore select sensitivity to „fixed“ under
settings sensitivity and set the desired
time.
Step 3
To adjust the integration time press the
-key or the -key.
Start with a fixed integration time of 10 ms.
Confirm your integration time with the -key
and return to the main menu with the - key.
Step 4
Start a first measurement to determine the
modulation of the measuring device.
Note that the optically active surface always
points in the direction of the radiation source
and is not covered.

0 7
Step 5
By pressing and holding the -key for ap-
prox. 1 sec, the measurement will be inter-
rupted and the measurement result is shown
on the display.
Step 6
Above the spectrum of your radiation source
you will find information on the modulation
(M) and the integration time (T).
For reproducible measurement results the
modulation should be between 80 - 90%. The
integration time should be increased below
50% (see step 3).
Hint:
For optimum measurement results, the measuring range should be fully con-
trolled. Very good measuring results are achieved when the measuring range
is at least 50%.
The modulation is linear to the set integration time. Example:
55/5000
T10 M20%: Measuring range is 20% used => Bad
T40 M80%: Measuring range is 80% used => Very good
Step 7
Repeat the measurement until the recom-
mended modulation is reached.
By using the -key or the -key, additional
information such as the radiation intensity or
radiation dose or the profile of irradiance for
the four spectral ranges can be displayed.
Step 8
Connect the device to your PC using a Mini
USB cable. With the software UVpad Viewer
you can now transfer your measurements to
the PC. For more information, see chapter 10
Data Export / PC-Software.

5 Technical Data 8
5 Technical Data
5.1 General technical data
Size (L x W x H)
160 x 100 x 14,4 mm³
Weight
375 g
Power
battery powered, 3 x CR2032
Max. operational temperature
70°C
Display
graphical, 128 x 64 px
Optically active surface
Diameter: 6 mm
Optically active surface position
on rear panel, 3 mm behind surface
internal memory
50 measurements with export option
1 measurement without export option
5.2 Radiometric measurements
Spectral range
200 - 440 nm
Spectral bandwidth
~ 2 nm
Irradiance measurement range
2 - 5000 mW/cm²
25 - 35000 mW/cm² (option)
Irradiance dose measurement range
1 mJ/cm² - 600 J/cm²
25 mJ/cm² - 42000 J/cm² (option)
Irradiance profile
4 spectral ranges (UVA, UVB, UVC, VIS)
with export option, otherwise only „Total“
Measurement time
0 bis 120 s, adjustable to ~ (rounded)
120 s (4 Hz)
48 s (10 Hz)
24 s (20 Hz)
10 s (50 Hz)
5 s (100 Hz)
8 min (1Hz)
Time resolution
10 ms to 250 ms, adjustable
Sampling rate
10 ms - 1000 ms,
automatically set
storage rate for export: see time resolution
Gain
normal / LowGain for 10 to 30 ms
Cosine correction
yes
Calibration
yes, traceable to PTB / NIST
frequency of checks (Recalibration)
12 months

5 Technical Data 9
5.3 spectral ranges
The classification of the UV regions in the spectral radiometer is carried out according to CIE
as follows: UVC 200 –280 nm; UVB 280 –315 nm; UVA 315 –400 nm; VIS 200 –440 nm.
according
CIE
UV-C
200 - 280 nm
UV-B
280 - 315 nm
UV-A
315 - 400 nm
VIS
400 - 440 nm
based customer specification
optional
5.4 USB / hardware-software-requirements
USB connector
MiniUSB
PC requirements
min Intel CORE i3, 2 GB Ram, >40 Gb HDD
operating system
Windows 7 with .NET Framework > 4.0
5.5 Effect related measurements
Photoinitiator / Sensitivity curve
optional

6 Intended Use 10
6 Intended Use
The UVpad determines the irradiance in the UV and VIS spectral range and indicates these on
the integrated display. It can be used in UV curing systems, if the maximum operating temper-
ature of 70 °C is not exceeded. For this reason, the UVpad is equipped with a thermal shield on
the rear panel. The rear panel of the UVpad may be exposed to intensive UV radiation. The
front panel must not be exposed to UV radiation.
7 Conventional Use
The UVpad is solely intended for the determination and visualization of irradiances, which are
generated in UV curing systems.
The UVpad is battery operated and suitable for usage with lithium batteries, type CR2032. In case
other batteries, than the supplied ones, are used, an operating range of up to 70 °C has to be ob-
served. Spare batteries are to be obtained from your supplier.
Operation only allowed in dry environments. The assembly position is arbitrary.
When using the UVpad, light and UV radiation can be reflected and distributed at the housing.
Appropriate protection measures for the protection against radiation need to be applied, if neces-
sary. Note: The UVpad itself does not emit any hazardous radiation.
The housing, with the exception of the battery compartment, must not be opened by the user.
The optically active surface must not be touched.
Gloves need to be worn when cleaning the optically active surface.
The UVpad is a highly sensitive optical measurement device. It must not be exposed to shocks.
Any other usage than the one described above leads to a damage of the product. Furthermore, this
involves risks, such as short-circuits, fire and electric shocks. The entire device must not be modi-
fied and/or remodeled! The safety indications are to be observed without fail.
optically
active surface

8 Important Information 11
8 Important Information
Please read the instruction manual completely before start-up and operation.
The latest version of the instruction manual applies.
Skin oil and contamination are absorbing in the UV spectral range. Finger
prints / contamination on the optically active entrance opening are to be
avoided. If necessary, clean thoroughly with Isopropanol. Use gloves when
cleaning.
The UVpad is calibrated.
ATTENTION: Opening of the housing (except for the battery compartment)
leads to a loss of calibration.
Only use batteries, which are suitable for up to 70 °C.
The UVpad is a highly sensitive optical measurement device. It must not be ex-
posed to shocks.
When using the UVpad, light and UV radiation can be reflected and distributed
at the housing. Appropriate protection measures for the protection against radi-
ation need to be applied, if necessary.
The maximum housing temperature can reach > 60 °C and there is the risk of
skin burns on contact. Please allow for the UVpad to cool down and use pro-
tective gloves to avoid skin burns.

9 Operation 12
9 Operation
The UVpad is operated via four keys. These are arranged on the front panel below the display.
The keys and the functions are illustrated as follows:
Key
Function

Back / Cancel / Off

Down

Up

Confirm / Continue
The keys -key and -key are additionally available as softkeys. Softkey functions are direct-
ly displayed above the key. Example:
9.1 Switching the device on and off
The UVpad is activated via any key. During the initialization (ca. 2s), the welcome screen is
displayed:
After the initialization, the standby menu is displayed:

9 Operation 13
In the standby menu, the UVpad is switched off via the key -key.
After 2 minutes of not using the UVpad, the device switches off
automatically.
9.2 Standby Menu
Via the standby menu, all functions of the UVpad are available for you. These are:
Start measurement
Show last measurement
Scope measurement
Settings
Information
In the standby menu and in all other menus, select the active menu item via the keys -key
and -key. Confirm the active menu item with the key -key. With -key, you return to the
previous menu without saving any changes.
The selected menu item is highlighted in black and displayed inverted. If several settings are
selectable, then the selected setting is marked with. Example:
In this example, the language “English” is set.
“German” is selected, but not set.
With the key -key, the setting is accepted
and the language is being changed.

9 Operation 14
9.2.1 Start Measurement
From the standby menu, a measurement is
started with the key -key.
The measurement device displays that a
measurement is in progress.
Stop the measurement by pressing -key.
Turn the measurement device and position it for the measurement.
1. Start measurement 3. Measurement in progress 4. Turn measurement device
2. Turn measurement device 5. Stop measurement
The UV pad requires approx. 2 seconds for the automatic adjustment of the
integration time. This can lead to fluctuating measuring results on belt con-
veyor systems. Use a fixed Sensitivity under Setting> Sensitivity> Fixed
Stop the measurement afterwards by pressing the key -key for at least 0.5s.
The measurement results are displayed automatically. For a better overview, these are parti-
tioned to four screens.
1. Irradiance (UVA, UVB, UVC, VIS)
2. Dose of irradiance (UVA, UVB, UVC, VIS)
3. Spectrum at maximum irradiance
4. Irradiance profile over the duration of the measurement
These can be displayed with the keys -key or -key.
1. Messung starten
2. Messgerät umdrehen
3. Messung läuft .... 4. Messgerät umdrehen
5. Messung beenden

9 Operation 15
First, the spectrum is displayed.
Notes:
The optimal integration time and the saturation of the measurement range are displayed at the
upper display edge. The integration time is displayed in ms. Example:
T 100: The optimal integration time is 100 ms
For optimal measurement results, the measurement range has to be fully modulated. For this
purpose, the UVpad has a 12-bit analogue/digital converter, which scans the spectrum continu-
ously. Excellent measurement results are achieved, when the measurement range is used to at
least 50%. Example:
M 70: The measurement range is used to 70% => Excellent
With the key -key, the irradiance is dis-
played.
With the key -key, the dose of irradiance is
displayed.

9 Operation 16
With the key -key, the profile of irradiance
for UVA, UVB UVC and VIS is displayed.
With the key -key, you are respectively being redirected to the previous menu. With the keys
-key or -key you can return to the standby screen.
Note:
If the irradiance is too low for the measurement range, then the UVpad dis-
plays no measured values. The irradiance and the dosage values are then dis-
played with “-“.
9.2.2 Show last Measurement
In the standby menu select the item “Show last measurement” to display the last measurement.
Select the values from the list of measurements, which you want to display.
The navigation in the display screens is taken out, as described in chapter 9.2.1.
Select the measurement with the keys -key
and -key. Confirm with -key. Return with
-key.
If 50 measurements have already been saved, then a note comes up prior to a
new measurement, stating that the memory is full and that the measurement
can be taken out without saving it, or that alternatively, the oldest measure-
ment result is being overwritten.
See Delete all Measurements
See Data Export

9 Operation 17
Delete all measurements:
The internal memory can be deleted directly on the UVpad or via a PC. For this purpose,
please select the prior menu item “Clear memory”.
Confirm with Yes (-key). Return with
-key or -key.
9.2.3 Scope Measurement
A scope measurement is a real-time view of the spectral irradiance. In the scope measure-
ments, the spectrum is displayed via the wavelength.
During the scope measurement, you can set up the sensitivity of the UVpad with the keys
-key and -key. Select -key for a lower sensitivity and -key for a higher sensitivity.
The sensitivity is not imported for the measurement of the irradiance.
Select a higher sensitivity (-key), if the spectrum is noisy or does not fill
the display completely.

9 Operation 18
Select a lower sensitivity (-key), if single lines of the spectrum are cut on
top. The measurement range is then exceeded and is shown in the display
MAX.
Examples:
Sensitivity too low
Sensitivity correct
Sensitivity too high
Risk of UV radiation.
Protect your skin and eyes during the work at and with UV radiation sources.
9.2.4 Settings
In the menu „Settings“, you can set up the sensitivity, the effective function, the menu lan-
guage and the date / time. Furthermore, you can reset the UVpad to the factory settings.

9 Operation 19
9.2.5 Information
Select the menu item “Information” from the standby menu, to display the serial number, the
firmware version, as well as the date of calibration.
With any key, you are being redirected to the
menu.
9.3 Settings
By selecting the menu item „Settings“, you are being directed to the settings menu of the
UVpad.
In this menu, the following functions are
available:
-Settings of the sensitivity
-Selection of the effective function
-Language settings
-Settings of date and time
-Reset to factory settings
9.3.1 Sensitivity
The UVpad adjusts the sensitivity automatically, in order to ensure the optimal signal-noise
ratio. The sensitivity is hereby set via the sampling rate. With high irradiances, the sampling
rate is increased in order to not exceed the measurement range. With low irradiances the sam-
pling rate is decreased. As a result in belt conveyor systems erroneous measurements may be
recorded. Please follow the instructions on the display and / or set a fixed integration time as
sensitivity.
Four pre-defined sensitivities are available.

9 Operation 20
In the setting „automatically“, the UVpad
adjusts the sensitivity, once a minimum irra-
diance is existent. This setting is suitable for
most applications.
In the setting „low“, the sampling rate is al-
ways between 10 ms and 100ms. The UVpad
can measure UV-systems with a very high
irradiance or significant irradiance modifica-
tions (e.g. with shutter operation or with very
high tape speed).
In the setting „high“, the UVpad measures
with a sampling rate of 1000 ms. This is ideal
for applications with a low irradiance.
In the setting „fixed“, the integration time is
predetermined. The UVpad can be used opti-
mally for known systems with shutters
The menu item “Sample rate” is displayed, if
you have selected a fixed sensitivity.
The integration time is set via the keys
-key and -key. Confirm with -key or
cancel the setting with -key.
Pressing -key on 10 ms setting switches to low sensitivity.
This reduces sensitivity by factor of 5.