PN 10795T 28
The time out feature conserves battery power by putting the H410 to sleep if there is no input from a
detector after a selected period of time. To awaken the H410 once it is in the sleep mode press the
ON/SELECT button.
To enter into the time out mode:
A. Press the MODE button to start a menu cycle of J, W, CAL, tO and cd.
B. Press the ON/SELECT button when the tO annunciator appears. The current time out setting will
be displayed and SET will flash.
C. Press the RANGE (count up) and MODE (count down) buttons to change the desired number of
minutes, from 1 to 9999.
D. Press the ON/SELECT button. The time out setting is now active and the power meter will return
to the last operational state.
E. Press and hold the OFF/CANCEL until the display blanks to save the setting.
F. Press the ON/SELECT button to turn the H410 back on.
Correcting FX Calorimeters Operating Parameters for Use at Different Wavelengths
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. FX and FXX 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 FX
or FXX calorimeter is used at a wavelength other than the calibration wavelength, the power meter’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:
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