Ushio UIT2400 User manual

USHIO AMERICA, INC.
5440 Cerritos Avenue, Cypress, CA 90630
Tel: [phone] 
Fax: [phone]
www.ushio.com
UIT2400
Operation Manual
Ushio America Inc.

UIT2400 INSTRUMENTATION MANUAL REV A, May 2020 2 OF 18
Table of Contents
1. Introduction 3
2. System Specifications 3
3. Quick Reference Guide 4
4. Internal Battery Pack 6
5. Sensor Connector and Wiring 7
6. USB Ports 7
7. Display 7
8. Current Measurement and Limitations 7
9. Sample Time and Limitations 8
10. 5V Bias for silicon sensors 8
11. Home Screen 8
12. Display Style Selection 8
13. Display Content 9
14. Feature Buttons 10
15. Settings 11
16. Files 15
17. Light Calc 15
18. Sleep 15
19. Survey 15
20. Info 16
21. Upgrades 16
22. Datalight Software 16
23. Care and Handling 17
24. Warranty 18

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1. Introduction:
Thank you for choosing the UIT2400. This instrument is a high precision, compact, hand held
light measurement instrument designed to be at home in the lab and in the field. The UIT2400
internal Datalight software was designed to be simplistic enough for easy touch screen
operation and advanced enough to meet the needs of researchers and scientists. The UIT2400
works with hundreds of sensor/filter/optic combinations to make it the most versatile hand held
light meter available.
The UIT2400 System includes:
A. UIT2400 Meter – 8 Decade auto ranging meter.
B. USB Cable - Micro and Mini USB cables for charging, software control and data
retrieval.
C. SED220 –custom 222nm detector, NIST traceable calibrated at 222nm
D. 8GB flash memory - for measurement recordings
E. CC200 Case– Protective carrying/shipping case.
F. Electrical Calibration Certificate – N.I.S.T. Traceable/ISO17025 accredited.
2. System Specifications:
A. Dynamic Range: 1 pA to 1 mA, Calibrated Range: 50 pA to 1 mA
B. Display: 4.3", 480x272, TFT Color LCD, Touch enabled, Backlit
C. Operating Temperature: 0-40 Deg C
D. Storage Temperature: -10 – 45 Deg C
E. Memory: 4GB microSD
F. USB Current Draw: Typical: 500mA Max:900mA (USB 3.0)
G. Bias: Programmable reverse 5V bias
H. Time:
H1. Sample Time: Select from 100 milliseconds – 5 seconds or use Auto (based on
light level)
H2. Recording Interval: Select from 1 second up to 1 hour, or Use “Sample” to match
the “Sample Time” for faster speeds.
H3. Chart Update Time (Trend): Select from 3 time per second up to once per hour.
I. Dimension: 3 x 6 x 1.5”
J. Weight: 2 lbs

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3. Quick Reference Guide:
3A. Front: The front panel of the UIT2400 is a full color 4.3" capacitive TFT touch screen
display. The display is a sensitive electronic device. It should not be exposed to sharp objects,
harsh environments, chemicals, liquids etc.
3B. Rear: On the back of the UIT2400 is a stand which is opened by grasping at the two
finger slots and gently lifting the stand up. The stand has small posts that slide along the
housing to open and close. No force should be applied to the stand during opening and
closing. When the stand is in use, no pressure should be applied to the meter as this can bend
the small post holding the stand into the housing.
3C Side: The right side of the meter includes:
A. USB A female port – For firmware and system updates (requires a USB stick).
B. Micro USB female port – For charging and extraction of saved data.
C. Mini USB female port – For charging the battery & running external Datalight II
software.
D. Charging LED – Light when device is charging (off when not charging)
E. On/Off – Fast Charge: Turns meter on for use. Turn off to conserve battery or for faster
charging.
3D. Top: Contains the sensor mount, a 15-Pin D-Sub connector
and posts for securing the sensor to the device. To connect the
sensor, align the sensor’s male 15 pin connector to the meter’s
female connector and apply slight pressure to insert. To assure
proper connection is maintained during testing, tighten screws on
each side of sensor connector.
3E. Quick Setting Guide: Your meter and sensor were purchased together along with optical
calibrations, your device(s) will arrive with factory pre-programmed optical calibration factors.
1. Plug in the sensor before turning on the UIT2400 to enable smart sensor
functionality.
2. Turn on the meter by pushing the On/Off button down into the (I) position.
3. After a short start up menu the Home Screen will appear.
4. Check the power monitor window in the upper right hand corner to assure batteries have
enough charge to complete testing. (see Section 4 for charging instructions)
5. Select your display style based on user preference (touch ICON to select)
Meter: Larger numerical values and no graph
Trend: Smaller control buttons with optional bar or line graph (see 15I for swap chart
type)
Tall: Portrait mode (USB ports and on/off switch on the right)
Wide: Landscape mode (USB ports and on/off switch on the top)
6. To change the display style, use the home button and touch the preferred display style

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icon.
7. The reading window will open in current mode and begin displaying measurements in
amps. Users can program their own settings to allow the window to open with the preferred
display.
8. The display will darken after a few minutes of inactivity to conserve battery power.
Touching the screen will return the screen to full brightness based on the brightness
settings. (see 15N & 15O to change display dimming/off settings)
3F. Quick Start – Common Problems: The two most common causes of error are incorrect
calibration factor use and improper zero. It is a good practice to verify the correct calibration
factor is in use before taking measurements. It is equally as important to assure a proper zero
has been performed.
3F1. Calibration Factor Verification. Locate the calibration factor on the detector
calibration certificate below the model and serial number fields in the top third of the report.
Example:
From the home screen select settings, scroll to the calibration factor selection window.
Verify the sensitivity factor and units are correct. If not, touch the selection window and a
scroll menu will appear, select a new channel until you find the correct sensitivity factor as
noted on your certificate. (If you do not locate your calibration factor and units from the
certificate, go to 5D to learn about
adding/changing calibration factors)
Touch the back button to return to the home screen.
3F2. Zero: There are two kinds of zero that can be used to improve accuracy. A dark zero
is used to remove small ambient noise caused from the environment. With the sensor
plugged in and covered with an opaque object, press the zero button. This reading will be
subtracted from all future readings to provide a zero reading. An ambient zero is used to
subtract small background light levels that are not coming from the test source. With the
test source off or blocked and the sensor exposed to the environment/ambient light, press
zero. Place the un-covered sensor in the test location. Cover the test light source, or turn it
off. Press Zero. The UIT2400 will take a measurement and subtract that value from all
future readings until zero is pressed again.
3G. Quick Start Feature Overview:
3G1. Display resolution: The < - and- > buttons below the display will allow the user the
control how many digits are displayed. i.e. 0.11 changes to 0.1111.
3G2. Display Units: Toggles between the available fields; current, light level, OD, and %
trans.

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To take calibrated light level readings, press display units until light level is selected.
Note: If light level is selected prior to selecting a calibration/sensitivity factor, an error
message Set Factor will appear in place of light level readings (see 15P1 for selecting
factors). If OD and % Trans, are selected and no baseline 100% value has been set
and error Set 100% will appear see 3G8 below to learn more about setting 100%)
3G3. Integrate: (Requires Display Units set to light level) Summation of data, records
exposure/dosage (ie. W/cm2 becomes J/cm2 in integrate mode).
3G4. Min-Max: Holds the display at the present value until a new minimum (lower reading)
or new maximum (higher reading) is measured, then updates the display accordingly.
3G4a. Note: Min-Max also serves as a Peak FW. See section 15F. Min/Max (and FW
Peak)
3G5. Record: Starts and stops (toggles between) continuous recording of readings and
creates a new file with time, instantaneous, min, max and average measurements.
3G6. Zero: Takes a measurement and creates a zero value by subtracting the zero
measurement reading from all future readings. (see 3F2 above to learn more about
assuring an accurate zero)
3G7. Hold: Freezes the numerical display value on screen.
3G8. 100%: Takes a measurement and saves it as the 100% baseline for transmission and
O.D.
3G9. Capture: Takes a single measurement. Captured measurements are appended to
the single sample file.
3G10. Quick Start Care and Handling:
Always store the meter in the carrying case when not in use and only ship in a
carrying case with protective packing to prevent shock and damage. No items
should be place above or under the meter inside the carrying case.
Do not expose meter to direct sunlight or high heat sources as the internal
temperature can rapidly increase and cause erroneous readings and damage.
Standard operating temperature is rated at 0-400C.
Do not apply any force to the display.
Do not apply pressure to extended stand.
Opening the housing voids warranty, Housing is not water tight, avoid moisture,
liquids and chemicals.
Contact Ushio customer service for repair and calibration prior to shipment and obtain an
RMA: [e-mail]
4. Internal Battery Pack:
4A. About: Inside the UIT2400 is a 3.7V 5500mAh rechargeable lithium-polymer battery pack.
A new fully charged battery pack typically last for 4-8 hours of continuous use (depending on
display brightness settings and other feature settings).

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4B. Charging: Charging the battery is done through the USB 3.0 mini or micro port.
WARNING: The battery pack in the UIT2400 is expected to last for many years. (up to 500 charge
cycles). Batteries should only be charged, stored and used in temperature between 0-45 degrees C,
or expansion and damage can occur. Battery packs should only be replaced by trained personnel.
Changing of the battery pack by non ILT personnel voids the warranty and can cause damage to the
pc board.
The power source can be supplied from a computer, a power bank, a charging hub, a wall-wart or any
USB 2.0 or 3.0 device. A full charge is obtained in approximately 12 - 14 hours. Meter will charges the
fastest when the power button is in the off position. The UIT2400 circuit is design to prevent over
charge. The UIT2400 has a low power indicator that will advise when the battery needs recharging.
5. Sensor Connector and Wiring:
The Smart sensors are supplied with an internal memory chip inside the D-sub connector that
includes the model and serial number of the sensor as well as calibration information. Plug in
the sensor before turning on the UIT2400 to enable smart sensor functionality.
The D-sub not only receives the current generated by the sensor after exposure to light, it also
supplies bias to sensors requiring bias for power and/or to improve response time.
6. USB Ports:
There are three USB ports on the side of the UIT2400 device
UPDATE: Is used for code updates and requires the use of a memory stick. (not
included)
DATA: Accesses the internal 8GB memory device where data is saved and to charge
the battery. The Micro USB is used to download stored data and to erase data from the
memory device. This port can also be used the charge the battery.
PC: The Mini USB port is used to connect to a computer and to charge the battery.
Datalight software is available for download on the website: https://www.intl-
lighttech.com/support/software, or request an emailed copy by emailing ilsales@intl-
lighttech.com
7. Display:
The Display is a full color 4.3" Capacitive TFT Touch screen display. Contact with sharp
objects will damage the display. A stylus or finger is recommended for changing settings on the
display. Care should be taken when packaging and storing the meter to assure no pressure is
applied to the surface of the display. Do not expose the Heat Sources, Strong UV Sources,
liquids or Chemicals.
8. Current Measurement and Limitations:
The UIT2400 provides accurate/calibrated measurements in the 50 pico-amp to 1 milli-amp
range and can be manually fixed to a specific range, or automatically change to the correct
range as the light level changes, using the auto range feature.
8A. Saturation: The UIT2400 provides an autorange mechanism allowing it to measure over 8
decades of current and/or light levels. While autoranging the UIT2400 can experience
saturation. When this condition occurs the display will provide a “SATURATION” warning. To
prevent saturation, neutral density filters or apertures can be added to the sensor, or a greater

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distance between the sensor and the source can be used.
8B. Dynamic / Measurement Range With UIT detectors: The UIT2400 can measure current
from 1 pA to 1mA however the recommended range for calibrated readings is 50 pA to 1mA.
This range does not take into account the range of current the sensor is capable of supplying
to the meter. Not all sensors allow linear calibrated measurements over this range.
To determine the operating range for a specific sensor when used with the UIT2400, the
formula is to divide the Min and Max current measurement ranges, as noted above, by the
sensors calibration factor from the ILT calibration certificate. (see 15P for information on
calibration factors). For example: SED220 is a vacuum Phototube with a working current
range of 50 pA to 1µA and a typical calibration factor of 2.0 e-3.
Min current of 50 pA / cal factor 2.0 e-3 (A)(cm2)(W-1) = min reading of 2.5E-08 W/cm2
Max current range of 1 µA / cal factor 2.0 e-3 (A)(cm2)(W-1) = max reading of 5.0E-04 W/cm2.
9. Sample Time and Limitations:
When using the internal computer and display, the device can update as fast as 50 samples
per second assuming the light intensity is strong enough to allow valid measurements at the
fastest settings.
Note: There are multiple factors that affect the sampling time including the sensors rise time,
the light level software selection, software settings and the method used to store and transfer
or display the data.
10. 5V Bias:
The UIT2400 can supply a 5V bias to sensors to increase the response time. Please apply 5V bias if
the calibration sheet indicates the use of bias during calibration
11. Home Screen:
When the meter is turned on it will take a few moments for the software to
initialize. Upon completion the home screen will be displayed. To return to the home
screen at any time, simply touch on the < Back arrow in the top left of the display in settings
screens, or touch on the home icon within a measurement screen. (Note: customers can skip
the home screen by changing the start up app in settings)
12. Display Style Selection:
Select your display style based on user preference:
Meter Tall: Meter displays the data in numerical format with NO GRAPH. Tall sets the display
to Portrait mode (usb ports on the right).
Meter Wide: Meter displays the data in numerical format with NO
GRAPH. Wide sets the meter to landscape mode (usb ports on
the top).
Trend Tall: Trend displays the data in numerical format along with
a chart containing a bar or line graph. (see 15I & 15J to make
changes to the chart settings)Tall sets the display to Portrait mode
(usb ports and on off switch on the right).
Trend Wide: Trend displays the data in numerical format along

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with a chart containing a bar or line graph. (see 15I & 15J to make changes to the chart
settings). Wide sets the meter to landscape mode.
Cloak: Cloak provides a black and white low intensity display setting to minimize light output
into the environment. This was designed to prevent light from the UIT2400 display being
included in the light level measurement. Cloak has a very large data capture button to allow
the user to easily capture and store a single reading in the dark.Cloak does not have the
feature buttons. Before entering cloak use Meter Tall for settings (see 14 below). For example
go to meter tall, click on display units for light level, then hit the home button and select cloak.
Captured measurements are appended to the “single_sample_file”, in the format date/time,
instantaneous value.
Light Stack: Light stack fills the majority of the display with a color indicator.
RED is typically used to indicate an error-unacceptable level that does not meet the customer’s
requirements. For hazard measurements, this level could be when the light level recorded is
unsafe. In other cases the level can be used as a go/no go level indicating the risk of product
failures when intensities are too low or too high.
YELLOW is typically used as a warning stage indicating the range has changed and is
approaching the “Red” error indicator level.
GREEN indicates the readings are in the desired range.
The light level display and buttons are much smaller in the Light stack to allow a greater
viewing area for the color indicators.
Note: for error message “Light Stack is not configured” see section 15K for set up.
13. Display Content and Controls:
13A. Indicator Line: Indicates which program is running, ie. Meter
Tall, and the battery life condition in percentage.
13B. Display Content: The content note, located above the
display, indicates which display units have been selected by the
display units button, followed by the units of calibration and on the far right is the settings
access icon.
13C. Resolution Adjustment: The Left button ←.000 increases the number of digits shown in
the numerical display the right button →.00 decreases the number of digits.
13D. Display Graph: In trend, the graph displays the average
light level since the last reading. The graph continues to update
even when Hold is pressed. Graph can be set to update as fast
as .1 seconds or as slow as once per hour. Note: See see 15I &
15J for setting bar or line graph.

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14. Feature Buttons:
14A. Display Units: Toggles between the available fields; Current
(output is in amps),
Optical Density: compares the incoming signal to the saved 100%
reading to provide an OD between 1 and 4,
Transmission: compares the incoming signal to the saved 100%
reading to provide a reading of % transmission.
Light Level: converts the incoming current from the sensor to
calibrated readings in appropriate units such as lux, fc, W/cm2,
Watts etc. Based on the user selected calibration factor. (see 15B
for selecting calibration factors and 15P for adding/programming
calibration factors.)
14B. Zero: Ta k es a reading in amps and subtracts that current value from all future readings.
Any value below the stored value will be shown as a Zero reading. When measuring small
light or current levels, it is a good practice to zero in the environment of the testing and perform
period zero validation or re-zero when the conditions in the environment fluctuate
(temperature, noise, ambient lighting)
14C. Integrate: Is used to measure dosage or exposure. When toggled on, the UIT2400 will
take the present reading and add it to the previous value, once per second, creating a sum of
light measurements over time. When in integrate mode the units of the readings change to
include *seconds. For example, W/cm2 becomes W/cm2*seconds or J/cm2, W/m2 becomes
J/m2.
14D. Hold: Freezes the value on the numerical display to allow manual recording. (Does not
apply to graph)
14E. Min/Max: Toggles the numerical display to only record a value that in Min, Is less than
the existing value on the display or in Max is greater than the existing value on the display.
14E1. Min/Max: also doubles as a Peak FW button. Peak FW is similar to Max, except it
pushes the limits of the system’s rapid measurement capability and uses the firmware
speed to scan for changes that occur very fast.
14F. 100%: Records the baseline value for 100%. This does not impact the display. To readout
in percentage you must use the display units button to select percentage.
14G. Record: Toggles the record data to on and off. When on, the meter stores all readings
internally. When off the meter stops saving readings to the internal memory. Recorded
measurements generate a new file each time the record start button is touched. The format for
naming recorded files is ILT day-mon-year. Record creates a five column .csv file with Time,
Instantaneous, min, max and average results.
14H. Capture: Records a single reading at the time the capture button is pressed. Captured
measurements are appended to the single sample file, in the format date/time, instantaneous
value.
14I. Home Returns to the home screen.

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15 Settings:
The settings icons open the settings display which allow user customization.
Settings can also be access by clicking on the setting drop down
menu in the display screens.
15A. Display Brightness: Brightness selection ranges from 1-Dim with lowest battery
consumption, to 10-Brightest with highest battery consumption.
Radiometer Settings
15B Calibration factors:
15B1. Meter Factor: Selects calibration factors from the pre-programmed/available list
ranging from 1 – 20. Factor selection allows readings in calibrated units such as W,
W/cm2, Lux etc.
15B2. Smart Detector Factor: Smart detectors can also store up to 20 calibration
factors. In order to use, or create cal factors that are saved in the sensor connector, Use
Smart Detector Factor must be enabled, in 15B3.
15B3. Smart Detector Factor ON/OFF:ON enable the use of the sensors cal factors.
Off only allows customer to use factors save in the UIT2400 meter.
15C. Sample Time: Allows the user to program how fast the meter takes a reading ranging
from 100 milliseconds to 5 seconds with the default set to Auto.
Auto will review the incoming signals intensity and apply the best settings. (faster with higher
light levels, slower for smaller signals for better averaging)As a general rule of thumb, If current
>= 1uA, 0.5sec is used, else if current <1uA, 1.0sec
FAST samples at 20ms (50Hz)
Note: Using trend at fast speeds taxes the CPU with processing both measurements,
numerical updates and graph updates. This can be seen as a slight flicker on the display. If
this problem occurs, use meter (no graph) or connect to the computer and use Datalight III
Meter or Flash.
15D. Auto Gain Range: On or off. The UIT2400 has 3 relays that it cycles through when auto
ranging from the lowest signals in the Pico amp range to the higher signals in the micro amp to
1 milli amp range. Auto allows the software to control when the device will change from one
relay to the next to allow the most accurate results based on incoming current levels. Auto gain
range- off requires the user to set the range they will stay in during measurement.(see 15E
below for information on setting the range.)
15E. Gain Range: When Auto Gain Range is set to off in section D above, Gain Range
becomes accessible. The user can select the range based the max current to be measured.
Ie; 1 mA, 3uA or 300 nA. Each relay allows the UIT2400 to measure approximately 3-4
decades with the max being the saturation point and noise become problematic as the reading
approaches .0005 from the max.
To determine the range of current that applies to a specific light level reading, the user can
select current in the display units (see section 14A for instructions) or multiply a previous
reading by the calibration factor used to obtain the reading. Ie. 1mW/cm2 (1e-3 mW/cm2) with

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a calibration factor of 1e-3 (A)(cm2)(W-1) =.000001 amps, 1e-3 * 1e-3.
15F. Min-Max (and FW Peak): The min-max settings allows the user to change the
functionality of the min-max button. When in Min/Max mode, the reading will only change for
Max when a reading that is higher than the displayed value is read, and for Min when a
reading that is lower than the displayed value is read. When FW peak is displayed the min-
max button will change to a FW Peak button. FW Peak uses the fastest scanning speeds to
see rapid changes in light intensity and uses less averaging. For Very Fast moving light
sources such as scanning lasers or pulses of light, use FW peak. For better averaging we
recommend using min-max when speed is not a factor.
15G. 5V Bias On or Off: The defaults setting is off as there are numerous sensors that can be
damaged or read incorrectly if bias is applied. Turn bias on when to increase the response time
for silicon sensors or if a 5V Bias was used during calibration (noted in Calibration sheet).
Recording to File Settings
15H. Recording Interval: Ranges from 1 second to 1 hour, or sample for faster speeds.
Sample: when selected, the record interval and sample time are synched. Ie if sample time is
set .1, the meter will record a value every .1 seconds.
Trend Chart Settings
15I. Chart Type: Select a bar graph or line graph.
15J. Update Interval: Select the time between updates to the display from .1 sec to 1 hour.
Error and Warning Level Settings
15K. Light Stack Setting: Settings for light stack will determine when the screen turns Red,
Yellow, and Green.
Trigger Type: There are three available triggers to initiate a
change in the indicator color.
Not used: An error will appear if light stack is selected when not
used is applied.
Low: Used when a reduction in light output causes an error, i.e.
phototherapy, under cure of product, Display testing, QC.
High: Used when an increase in light output could cause an
error. i.e. optical hazard, QC.
Range: For when a rise or fall of light level can be problematic.
Warning Level: Threshold for turning the display Yellow
Error Level: Threshold for turning the display Red.
Set up error messages:
1. The target/warning /error levels need to be numbers.
2. For Low trigger, the error level must be less than the Warning level
i.e. target is 1 mW/cm2 or higher (1e-3), a warning level (5e-4) (display turns yellow) when the

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light level decreases to .5mW/cm2(5e-4) or less, and an Error Level (8e-5) (Display turns red)
will occur when the light falls below .08 mW/cm2(8e-5)
3. For High and Range, the error level must be greater than the warning level.
i.e target is 1 mW/cm2 (1e-3) the warning must be larger than 1e-3 ie 3e-3 or 3 mW and the
error must be larger than the warning and target i.e. .5 mW/cm2.
Other Settings
15L. Start-Up App: Allows the user to change the display style from the default “Home
Screen” to Meter, Trend, Cloak, Survey or Light stack automatically when the device turns on.
15M. Use Scientific Notation ON / OFF:
Scientific notation ON uses an exponent to show the decimal place, when off, a prefix is used.
Examples:
On (1.35 e-3 W/cm2), Off (1.35 mW/cm2)
On (4.78e-6 W/cm2), Off (4.78 uW/cm2)
For help understanding scientific notation: see chart:
15N. Dim Display After time settings: Sets the time in minutes before the display will dim to
save on battery life. Times range from 5 min- 60 min and also includes Never.
15O. Turn Off Display After time settings: Sets the time in minutes before the display will
shut off to save on battery life. Times range from 5 min- 60 min and also includes Never.
Maintenance
15P. Set Date and Time: Allows the user to set the date and time which are then used to
create file names and date/time stamps on the saved .csv files as discuss in 16 above.

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15Q. Manage Calibration Factors:
Creating calibration factors and use of Non-ILT calibration factors can cause errors in
light level readings. The calibration factors listed in the Optical Calibration Certificate
are N.I.S.T. traceable and are performed in our ISO17025 accredited lab by trained and
experienced technicians. Use of altered calibration factors can void traceability.
15Q.1. Factor Number: Numbers range from 1-20. The UIT2400 stores up to 20
calibration factors which are selected using Factor number as shown in section in 15B.
15Q.2. Factor Description: Enter a nick name, component model & Serial number, or
sensor stack
ie Care222 sensor, 033#234, 005/UVA/W. (Note: spaces are converted to a “-”)
15Q.3. Factor: Units Enter the units for the readout ie. W/cm2
15Q.4. Sensitivity Factor: Enter sensitivity factor from the ILT calibration certificate.
2.09e-09 (see red arrow on cal cert on page 14)
15Q.5. Resulting Light Level: Allows the user to enter a known value for the light level
under test and create a calibration factor to force the meter to read the correct value.
i.e. Care222 with 40 uW/cm2 is measured. Enter 40, press set. A new calibration factor will
be created to read 40 and auto-range up and down through other light intensities.
15Q.6. Factor Adjustment: User can enter a value to alter the calibration factor by for
example if adding a neutral density filter with attenuation of 10, enter 10 and press set. A
new calibration factor, that has changed by 10, will be entered in the next available
channel.
15R.Firmware Update:
Ushio will contact you when new firmware for your device is available and provide instructions
how to upgrade.
15T. Save Settings: Permanently saves all settings to memory (until Save Settings is pressed
again) When applied a box will appear around the button to indicate completion.
15U. Restore Defaults: Returns all datalight software settings back to the factory default

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values. (Restore does not erase or alter calibration factors or any save data within the device)
16. Files:
The .csv files saved in the Files folder can be accessed using both internal software which will
display a graph of the results or downloaded using the USB micro port.
16A. Viewing Stored Readings: Click on the Files icon. The newest recording file will
automatically open in the graph. Use the drop down menu to select a different file. If the
recording is still ongoing you can click in and out of the file (view a different file then return the
ongoing measurement file) to update the graph results in the view window. To view files
created using the survey app, scroll down to survey data file, to view files created using
capture, scroll down to single sample file.
16B. Downloading Stored Readings: When the UIT2400 is connected to the computer using
the USB micro cable, the computer will register the UIT2400 as a device with removable
storage, allowing access into the Files folder. To access saved Files using a PC, click on Start,
Computer and then click double click on the “Removable Disk ...” within “Devices with
Removable Storage”.
To open in excel, you will need to select tab or space delimited
16D. Deleting Stored Readings: To delete files, access the files through the USB micro port.
Selected the file to highlight the then press delete.
17. Light Calc:
Includes some basic light measurement formulas for converting between units of measurement
such as foot-candles to lux, lux to candela, W/m2 to W/cm2 etc.
Ie Enter 1.11 W/cm2 reading obtain a calculated reading of 1.11e+4 W/m2.
For lux to Candela, enter lux value and the distance in meters. Additional formulas may be
added over time, if you have a formula you would like ILT to add, please email ilsales@intl-
lighttech.com.
18. Sleep:
Manually sets the screen to dark to conserve battery. Simply touch the display at any time to
turn off sleep mode and re-illuminate the display.
19. Survey:
Ushio’s built in survey application allows customers to apply an address or note, which will be
added to the date and time stamp for captured readings. Captured readings will be used to
create a .csv file which can be downloaded and used to create a light survey report.
1. To start a survey, touch the survey Icon. Survey opens in Portrait mode and
automatically displays readings based on user programmed parameters. (Similar to
Meter Tall).

UIT2400 INSTRUMENTATION MANUAL REV A, May 2020 16 OF 18
2. Touch the “Select Location” box to open the drop down selection window.
3. To choose and existing address: Use the scroll bar to highlight the address. Touch the
address to apply. The address will not show in the Select Location box.
Note: Addresses can also be imported into the UIT2400, by creating a custom Survey-
locations.txt and uploading through the USB micro port.
4. To Add or Delete of the addresses list and touch Add/Delete location.
5. To Delete: Touch in side the grey the drop down menu from the top box, Cursor to the
location that is to be removed, Touch the location to apply, With the box showing the
location, touch the “Del” delete button. The Delete buttons border will turn blue to
indicate completion. If you want to back out of Delete, scroll to the top and select the
blank line above the addresses.
6. To Add: Touch inside the white add box. Use the keyboard to add an address or a note.
Touch the Add. The add border will turn blue to indicate the new address has been
saved.
7. When done adding and deleting addresses, touch the < Back button.
8. To apply an existing location click in the Select location box. Use the scroll bar to
highlight the address. Touch the address to apply. The address will now show in the
Select Location box.
9. To save reading(s) touch the capture button. Readings will be saved to the
Survey_data_file.csv file, accessible fie the usb micro port.
20. Info:
Lists product and software settings including model no, serial no, calibration information,
software and firmware information and user programmable selections such as sample time,
range selection etc.
21. Upgrades
Ushio offers software and firmware upgrades at no additional cost as they become available.
Though extensive testing on the internal and external datalight software has been done, there
is a chance we may find a small bug or an area that we can improve upon over time. Ushio
will inform customers if firmware upgrades become available and provide instructions how to
obtain and install them.
22. Datalight software for Windows 7, 8 or 10 PC:
The UIT2400 can be connected to a computer via the USB mini port and be controlled by
external software. Datalight III software is available for download on the website:
http://www.intl-lighttech.com/support/software.
You will be brought through a simple set of “Next”, “Next”, “Finish” steps.
Once you have installed the Datalight III software, Turn on your UIT2400 and allow initialization
to complete. After completion, Plug the UIT2400 into any available USB port or a hub
connected to the computer. Wait up to 2 minutes for the drivers to install. You can verify a USB
port has been assigned properly using device manager, under Ports (COM & LPT) as seen in
the following image:

UIT2400 INSTRUMENTATION MANUAL REV A, May 2020 17 OF 18
22A. Set Up Procedure: Allow the computer to assign a com port and install FTDI drivers
manually, as needed. Device drivers are located in C, Program Files, International Light
Technologies, Datalight III, FTDI folder. To install drivers double click driver CDM…..exe
Software manuals for Datalight III can be found on the ILT website: http://www.intl-
lighttech.com/support/manuals-documentation
23. Care and Handling:
The UIT2400 internal board is a sensitive electronic device. Due to risk of board damage, only
trained personnel should attempt opening the housing on the UIT2400. Opening the UIT2400
by non-ILT personnel voids all warranties and may adversely affect the calibration of the meter.
Always store the meter in the carrying case when not in use and always ship in the hard plastic
carrying case with protective packing to prevent shock and damage. No items should be place
above or under the meter inside the carrying case. Do not expose meter to, strong levels of
UV, direct sunlight or high heat sources as the internal temperature can rapidly increase and
cause erroneous readings and damage. Do not apply any force to the display. Do not apply
pressure to the meter when the stand is in use.
23A. Operating Temperature: 0-40°C. ILT meters and sensors have a recommended
operating range of 0 to 40°C to assure the accuracy of the calibrated measurements.
23B. Humidity: 0-95% non-condensing.
23C. ESD: Use basic ESD precautions and practices when handling the device. It is advisable
to discharge any static buildup by touching a grounded conductive surface before making
contact with devices or its connectors.

UIT2400 INSTRUMENTATION MANUAL REV A, May 2020 18 OF 18
23D. Cleaning: No chemicals or liquid solution should be used to clean the UIT2400 housing.
The UIT2400 housing does not provide a sealed barrier to protect the internal components
from moisture. The display should be cleaned with low moisture lens cleaning cloths to
prevent scratching. Use care near the edges to assure moisture does not seep into the
housing.
23E. Submersion: The UIT2400 housing is not rated for submersion.
23F. Calibration: We typically recommend an annual calibration for all equipment. Per
ISO17025, the customer may, through their own QC process, create their own calibration
cycle.
23G. Service: Before returning any equipment to Ushio for service (including warranty
evaluations) customer should contact Ushio America customer service and obtain an RMA:
customerservi[email protected]om
24. Warranty:
The equipment you have purchased from Ushio America, Inc. has been expertly designed and
was carefully tested and inspected before being shipped. If properly operated in accordance
with the instructions furnished, it will provide you with excellent service. The equipment is
warranted for a period of twelve (12) months from date of purchase to be free of defects in
material or workmanship. This warranty does not apply to damage resulting from improper set
up, accident, alteration, abuse, loss of parts or repair by unauthorized personnel. The
equipment will be repaired or replaced, at our option, without charge to the owner for parts or
labor incurred in such repair. This warranty shall not apply unless the equipment is returned for
our examination with all transportation charges prepaid.
The internal Datalight and external Datalight II & III Software and Firmware are supplied “as-Is”
with no warranty.