User's Guide

User Guide
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9 Output Intensity Modes/Calibration Process
9.1.1 Calibration of the exposure timer is not required.
9.1.2 The S2000 PRO/ELITE system uses a quarts crystal to generate it’s system
clock signal. It provides a stable and precise clock signal to the S2000
PRO/ELITE control system and sub-systems, including the timing module of
the light intensity control shutter.
9.1.3 The accuracy of the S2000 PRO/ELITE exposure time is therefore determined
by the oscillating frequency stability of it’s quartz crystal. Quartz crystals are
well known to oscillate at a constant frequency throughout their lifetime.
9.1.4 The S2000 PRO/ELITE design allows Excelitas Canada to Guarantee the
Exposure Timer Tolerance for the lifetime of the product. The exposure does
not need calibration.
9.1.5 The S2000 PRO/ELITE system can operate in two different output intensity
modes: Absolute or Relative.
9.1.6 Absolute mode: refers to the condition when the S2000 PRO/ELITE has been
calibrated. The display will show an absolute value of irradiance in W/cm2.
9.1.7 Relative mode: refers to the condition when S2000 PRO/ELITE has not been
calibrated. The display will show the percentage of iris opening.
9.1.8 Section 10 describes adjusting the light output in both relative and absolute
modes in greater details.
9.1.9 The S2000 PRO/ELITE can be calibrated and correspondingly set to a
specified irradiance (set point) by the R2000 Radiometer. The R2000
Radiometer connects to the S2000 PRO/ELITE via the front panel RS-232
radiometer port.
9.1.10 While the CAL button on the radiometer is pressed, the display will indicate the
current set point and the SET icon will be flashing. If the CAL button on the
radiometer is pressed for less than 5 seconds the current radiometer set-point
will be sent to the S2000 PRO/ELITE.
9.1.11 Holding this button for 5 seconds will store the current optical input into the
radiometer’s set point (this feature can be enabled or disabled via PC). The
SET Icon will cease flashing and be continuously on until the button is
released.
S2000 PRO/ELITE Exposure Timer Tolerance:
+/- 250ms or +/- 1% of the exposure time setting, whichever is
greater.