Scientech H410 Vector - Manual (Page 11)

11
The preceding list of modes in bold type represents the measurement modes of the H410. These modes are
discussed in this Quick Setup section. The modes in normal type allow you to customize the H410’s set up for
different detectors and are discussed in detail in the Operating Procedure section for each detector.
Press the MODE button to start the menu cycle. Press the ON/SELECT button when the measurement mode
you desire appears in the display.
7. Zero the display:
If you have chosen the calorimeter Power (W) mode or are using a photodiode detector you must zero the
display by pressing the CANCEL button before any measurements are taken. It is not necessary to zero the
display in any other mode of operation, but if you choose to do so no errors will be introduced.
8. Take your measurement:
Direct the laser beam onto the absorbing surface of the detector.
O
PERATING
P
ROCEDURES
:
U
SING THE
H410
WITH
V
ECTOR
 P
YROELECTRIC
D
ETECTORS
:
Pyroelectric detector models P25, P50, SP25 and SP50 are coated with a special black absorbing material which
provides a very flat spectral response over a broad wavelength band. Pyroelectric detector models PHD25,
PHDX25, PHDX25UV, PHD50, PHDX50, PHDX50UV, SPHD25, and SPHD50 are coated with a special high
damage absorbing material which provides absorption over a broad wavelength band. Models PHF25, PHF50,
SPHF25 and SPHF50 have a partially absorbing, partially reflecting chromium coating. The relative spectral
responses of these detectors are shown in the following graph. Please be aware of the absorption differences
between the detector’s calibration wavelength and your operational wavelength. Detailed absorption
information is contained in the charts at the end of this manual.
RELATIVE SPECTRAL RESPONSE
20
30
40
50
60
70
80
90
100
0.1 1 10 100
WAVELENGTH [microns]
PERC
E
N
T
AB
SORPTION
P and SP
HR-P
PHD, PHDX*
and SPHD
HR-PHF
PHF and SPHF
*HDX Limited to 0.4 to 2.0 microns
X
PHDXUV
Before using your Vector joulemeter system, please review the energy density formulas given in the chart at the
front of this manual. Familiarize yourself with all of the specifications of the detector models which you are
using. A damage test slide is provided with each P and PHF type detectors, but not with PHD type detectors.
Fire the beam at the test slide before using the detector to be sure you are operating under safe conditions.
Note: The trigger threshold of the H410 is 7 % of full scale.
1. To Turn On the Meter:
Note: For the most accurate measurements possible, the H410 should be turned on and warmed
up for 30 minutes.