Scientech H410 Vector - Manual (Page 17)

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11. Time Out:
Note: You must save all settings by pressing and holding the OFF/CANCEL button until the
display blanks. If the H410 is turned off, by using the ON/OFF slide switch, before settings
are saved they will be lost.
Note: The time out default setting is 10 minutes.
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, AVG J, W, CAL and tO.
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 indicator will return to the last
operational state.
E. Press and hold the OFF/CANCEL until the display blanks to save the setting.
E. Press the ON/SELECT button to turn the H410 back on.
C
ORRECTING
P
YROELECTRIC
D
ETECTOR
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.
All pyroelectric detectors are calibrated at a specific wavelength and the detector’s output sensitivity is derived
for that wavelength. The output sensitivity and calibration wavelength is recorded in the Operating Parameters
section at the front of the manual and on the detector’s serial tag. When a pyroelectric detector is used at a
wavelength other than the calibration wavelength, its output sensitivity can be adjusted to compensate for the
absorption rate at the new wavelength. The new output sensitivity is calculated as follows:
1.
Find the absorption rate from the chart at the end of this manual for the calibration wavelength of your
pyroelectric detector.
2. Find the absorption rate for the wavelength where you will be working.
3. Determine the new output sensitivity using the following formula:
absorption rate of new wavelength x output sensitivity (V/J) = output sensitivity for new
absorption rate of the calibration wavelength wavelength from serial tag
This new output sensitivity can be entered into the H410 as described in Group Settings or when using the
pyroelectric detector without a H410 indicator as discussed later in this manual.