3F. Quick Start – Common Problems:
The two most common causes of error are incorrect calibra on
factor use and improper zero. It is a good prac ce to verify the correct calibra on factor is in use
before taking measurements. It is equally as important to assure a proper zero has been performed.
3F1. Calibra on Factor Verifica on.
Locate the calibra on factor on the detector calibra on
cer ficate below the model and serial number fields in the top third of the report.
Example:
From the home screen select seLngs, scroll to the second seLng window labeled Factor Number.
Verify the sensi vity factor and factor units are correct. If not touch the selec on window and a
scroll menu will appear, select a new channel un l you find the correct sensi vity factor as noted
on your cer ficate. (If you do not locate your calibra on factor and units from the cer ficate, go
to 5D to learn about adding/changing calibra on factors)
Touch the back bu3on 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 bu3on. 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. (An example of an ambient zero
source is a computer display that is needed during tes ng.) Place the un-covered sensor in the
test loca on. Cover the test light source, or turn it off. Press Zero. The ILT2500 will take a
measurement and subtract that value from all future readings un l zero is pressed again.
3G. Quick Start Feature Overview:
The first me you turn on your meter you will most likely open in
the home screen. IF not, you can use the home bu3on to access the home scrren. Select an
applica on such as Meter or Trend to familiarize yourself with the func onality. The App you are
running (ie Meter Tall) will be displayed in the upper le and the ba3ery life indicator will be displayed
in the upper right. In the second line you will see the units of measurement and the selected
calibra on factor Channel.
3G1. Display resolu on:
The < - and- > bu3ons below the display will allow the user the control
how many digits are displayed. Ie. 0.11 changes to 0.1111.
3G2. Display Units:
Toggles between the available fields; current, light level, OD, and % trans.
To take calibrated light level readings, press display units un l light level is selected.
Note:
If light level is selected prior to selec ng a calibra on/sensi vity factor, an error
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