UIT2400 INSTRUMENTATION MANUAL REV A, May 2020
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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
