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14E. Min/Max:

 Toggles the numerical display to only record a value that in Min, Is less than the 

exis ng value on the display or in Max is greater than the exis ng value on the display.  

14E.1 Min/Max: 

also doubles as a 

Peak FW 

bu3on. 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 bu3on 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  me the record start bu3on 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  me the capture bu3on is pressed. Captured 

measurements are appended to the single sample file, in the format date/ me, instantaneous value.

14I. Home

 Returns to the home screen.

15 Se5ngs:

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 dis

play

screens.

15A. Display Brightness

: Brightness selec on ranges from 1-Dim with lowest ba3ery consump on, to 

10-Brightest with highest ba3ery consump on.

Radiometer Se$ngs

15B Calibra on factors:
15B1. Meter Factor :  

Selects calibra on factors from the pre-programmed/available list ranging from 

1 – 20. Factor selec on allows readings in calibrated units such as W, W/cm2, Lux etc.

15B2. Smart Detector Factor: 

 Smart detectors can also store up to 20 calibra on 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.

15Be.  USE Smart Detector Factor:  ON/OFF  

ON enable the use of the sensors cal factors. Off only 

allows customer to use factors save in the ILT2500 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 seLngs. (faster with higher light 
levels, slower for smaller signals for be3er 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 ILT2500 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 so ware 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 

ILT2500 INSTRUMENTATION MANUAL  Preliminary 8/18     11 OF 22

Summary of Contents for ILT2500

Page 1: ...ILT2500 Opera on Manual ILT2500 manual www intl lighttech com 1 of 22...

Page 2: ...t Measurement and Limita ons 8 9 Sample Time and Limita ons 9 10 5V Bias 9 11 Home Screen 9 12 Display Style Selec on 10 13 Display Content 10 14 Feature Bu ons 11 15 Se5ngs 11 16 Files 16 17 Light Ca...

Page 3: ...480x272 TFT Color LCD Touch enabled Backlit C Opera ng 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 Programm...

Page 4: ...in sensors mfg 2018 or later 2 Turn on the meter by pushing the On O bu3on down into the I posi on 3 A er a short start up menu the Home Screen will appear 4 Check the power monitor window in the upp...

Page 5: ...mbient zero is used to subtract small background light levels that are not coming from the test source With the test source o or blocked and the sensor exposed to the environment ambient light press z...

Page 6: ...al temperature can rapidly increase and cause erroneous readings and damage Standard opera ng temperature is rated at 0 400 C Do not apply any force to the display Do not apply pressure to extended st...

Page 7: ...Analog In 1 Pin6 Det Cathode Pin14 External Analog In 2 Pin7 Det Anode Pin15 N C Pin8 5Volts Warning please consult with an ILT technician before connec ng a current genera ng device that could excee...

Page 8: ...hen this condi on occurs the display will provide a SATURATION warning To prevent satura on neutral density lters or apertures can be added to the sensor or a greater distance between the sensor and t...

Page 9: ...material ILT silicon sensors include SED033 SED100 SCD110 XSD140B XSD340B XSD140A and XSD340A 11 Home Screen When the meter is turned on it will take a few moments for the so8ware to ini alize Upon c...

Page 10: ...e as fast as 1 seconds or as slow as once per hour Note See see 15I 15J for seLng bar or line graph 14 Feature Bu ons 14A Display Units Toggles between the available fields Current output is in amps O...

Page 11: ...alibra on factors 15B1 Meter Factor Selects calibra on factors from the pre programmed available list ranging from 1 20 Factor selec on allows readings in calibrated units such as W W cm2 Lux etc 15B2...

Page 12: ...es such as scanning lasers or pulses of light use FW peak For be3er averaging we recommend using min max when speed is not a factor 15G 5V Bias On or O The defaults seLng is o as there are numerous se...

Page 13: ...3 For High and Range the error level must be greater than the warning level Ie 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 warni...

Page 14: ...ed arrow on cal cert on page 14 15Q 5 Resul ng Light Level Allows the user to enter a know value for the light level under test and create a calibra on factor to force the meter to read the correct va...

Page 15: ...adings When the ILT2500 is connected to the computer using the USB micro cable the computer will register the ILT2500 as a device with removable storage allowing access into the Files folder To access...

Page 16: ...the loca on to apply With the box showing the loca on touch the Del delete bu3on The Delete bu3ons border will turn blue to indicate comple on If you want to back out of Delete scroll to the top and...

Page 17: ...in SeLngs The white display box shows the ash count in the upper le Note Counts was designed for rapid rises in light intensity and increases when the signal rises 4x between 100uS samples the working...

Page 18: ...generated light level measured exceeds the measurement capabili es of the system Increase the distance add a3enua on lters or add an aperture to the sensor to allow measurement of stronger signals Low...

Page 19: ...00 decreases the number of digits of strobes to count v is a programmable value of how many ashes to be measured Level selec on High Light level 3 uA to 1 mA Frequency 3 1 4 Hz Low Light 0 to 3 uA Fre...

Page 20: ...hould be plugged in during ini aliza on Insert the USB s ck into the USB A port on the side of the ILT2500 Click on Settings and Scroll to the bottom of setting window Click on the rmware update box S...

Page 21: ...pressure to the meter when the stand is in use 28A Opera ng Temperature 0 40 C ILT meters and sensors have a recommended opera ng range of 0 to 40 C to assure the accuracy of the calibrated measuremen...

Page 22: ...parts or repair by other than Interna onal Light Technologies The equipment will be repaired or replaced at our op on without charge to the owner for parts or labor incurred in such repair This warra...

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