Scientech S310 Vector - Manual (Page 27)

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The following are viable external triggers.
The following pulses will not trigger the S310.
C
ORRECTING
A
STRAL
 S
ERIES
HD C
ALORIMETERS
O
PERATING
P
ARAMETERS
FOR
U
SE AT
D
IFFERENT
W
AVELENGTHS
:
NOTE: Due to variability in the manufacturing process the absorption characteristics of the HD and P
model detectors can vary in the UV region (190 to 400nm). Scientech recommends optical
calibration at 266nm if the detector is to be used in the UV region instead of relying on an
absorption rate in the chart at the end of this manual.
Scientech calorimeters in general have a flat response to all wavelengths within their specified spectral
response. HD and HDX calorimeters are an exception to that rule and are calibrated at a specific wavelength
by adjusting the calorimeter’s gain circuitry for that wavelength. The calibration wavelength is recorded in the
Operating Parameters section at the front of the manual and on the detector’s serial tag. When a HD or HDX
calorimeter is used at a wavelength other than the calibration wavelength, the indicator’s displayed value can be
adjusted to compensate for the absorption rate at the new wavelength by using an attenuation factor. The
attenuation factor is calculated as follows:
1. Find the absorption rate from the chart at the end of this manual for the calibration wavelength of your
calorimeter.
2. Find the absorption rate for the wavelength where you will be working.
3. Determine the attenuation factor using the following formula:
absorption rate of calibration wavelength = attenuation factor
absorption rate of the new wavelength
The attenuation factor can be entered into the S310 as described in the Group Setting section.