SERIES CALORIMETERS Setup and Operating Procedures PN9458P
Thank you for choosing a Scientech Astral calorimeter. Scientech, an ISO 9001 registered company, and our employees are pleased to provide you with a product designed for years of reliable service. Please read this manual completely before using your indicator. This information will enable you to fully utilize the equipment and should be located nearby for reference. The calorimeter is intended to be used only in the manner outlined in this manual. Misuse of the equipment may cause product failure.
ASTRAL™ CALORIMETER SPECIFICATIONS: Model Type of Absorber Aperture Diameter Spectral Response Average Power Maximum Average Power Minimum Noise Level Maximum Power Density Maximum Peak Power Density Maximum Single Pulse Energy Maximum Energy Density Precision Accuracy Response Time Dimensions DxL - inches cm Weight - pounds/kg Indicator Compatibility Model Type Absorber Aperture Diameter Spectral Response Average Power Maximum Average Power Minimum Noise Level Maximum Power Density Maximum Peak Power Densi
ABSORPTION OF HD ABSORBING MATERIAL: Warning: You must exercise caution when using HD detectors. They exhibit spectral reflection of between 7% and 18%, of the input power, back out of the aperture. Please refer to Figure 1 to determine the reflectance for the wavelength you are measuring. These detectors should be treated as a partial mirror or any other type of reflective optic and the appropriate caution level observed, especially at the CO2 wavelength. A B S O R P T IO N O F H D A B S O R B E R V s .
Note: Astral calorimeters are sensitive to all types of thermal input. Due to the handling of the calorimeter during setup and possible environmental temperature differences, thermal gradients may exist in the calorimeter. Allow the calorimeter to sit undisturbed for several minutes to, reach thermal equilibrium, before using.
Operation of Astral Calorimeters with a Digital Volt Meter: The calorimeters may be used with any digital volt meter (DVM) capable of reading 5 volts full scale. Connect the output of the calorimeter to the DVM. Select the DC volts mode. Direct the laser beam on to the absorbing surface of the calorimeter.
Numerical Integration: Finding the area under the curve in figure 7 is the equivalent procedure for determining pulse energy. Choose an appropriate time interval, dt, and perform the summation: N N E = ∑ Wixdt = (dt/S)∑ Vi I=1 i=1 The error caused by this procedure is: N dE = (dt/S) Σ dVi i=1 The error, in theory, is only dependent upon the value of ∑dVi, that is the cumulative random error of Vi. This number should approach zero if data is carefully taken.
CALIBRATION OF ASTRAL CALORIMETERS USING ELECTRIC SUBSTITUTION HEATING: For Astral calorimeters the electric substitution heating option must be ordered and installed at the factory when the calorimeter is purchased. It can not be retrofitted to a calorimeter at a later time. To calibrate using electric substitution heating proceed as follows. A. Remove the screws holding the calorimeter's ID tag and remove the plate to expose the circuit board. Figure 4 B.
FACTORY RECALIBRATION: Scientech recommends that a complete calibration be performed annually to verify system accuracy. Please contact our Product Service Department at (800)525-0522 or (303)444-1361 or Fax (303)444-9229 or email inst@scientech-inc.com to arrange for a NIST traceable, factory calibration. LIMITED WARRANTY: All Scientech Laser Power and Energy Measurement Systems are warranted against defects in materials and workmanship for two (2) years from date of delivery.
HD ABSORPTION VS. WAVELENGTH: Wavelength µm 0.200 0.210 0.220 0.230 0.240 0.250 0.255 0.260 0.265 0.270 0.275 0.280 0.285 0.290 0.295 0.300 0.305 0.310 0.315 0.320 0.325 0.330 0.335 0.340 0.345 0.350 0.355 0.360 0.365 0.370 0.375 0.380 0.385 0.390 0.395 0.400 0.405 0.410 0.415 0.420 0.425 0.430 0.435 0.440 0.445 0.450 0.455 0.460 0.465 0.470 0.475 Absorption % 93.66 93.78 92.18 90.44 88.79 90.07 90.42 90.41 90.56 90.71 91.13 91.63 91.85 92.01 92.73 93.02 93.04 93.15 93.53 93.45 93.82 93.83 93.96 94.07 94.
Wavelength µm 1.245 1.250 1.255 1.260 1.265 1.270 1.275 1.280 1.285 1.290 1.295 1.300 1.305 1.310 1.315 1.320 1.325 1.330 1.335 1.340 1.345 1.350 1.355 1.360 1.365 1.370 1.375 1.380 1.385 1.390 1.395 1.400 1.405 1.410 1.415 1.420 1.425 1.430 1.435 1.440 1.445 1.450 1.455 1.460 1.465 1.470 1.475 1.480 1.485 1.490 1.495 1.500 1.505 Absorption % 91.78 91.79 91.76 91.75 91.76 91.79 91.75 91.74 91.74 91.74 91.71 91.72 91.70 91.70 91.73 91.78 91.78 91.79 91.76 91.77 91.82 91.94 92.17 92.17 92.17 92.15 92.12 92.
Wavelength µm 2.129 2.130 2.132 2.135 2.136 2.139 2.140 2.143 2.145 2.146 2.150 2.153 2.155 2.157 2.160 2.161 2.164 2.165 2.168 2.170 2.171 2.175 2.179 2.180 2.182 2.185 2.186 2.190 2.193 2.195 2.197 2.200 2.201 2.205 2.208 2.210 2.212 2.215 2.216 2.220 2.224 2.225 2.227 2.230 2.231 2.235 2.239 2.240 2.243 2.245 2.247 2.250 2.251 Absorption % 90.76 90.41 90.05 90.41 90.43 90.84 90.48 90.46 91.65 90.04 90.45 90.44 90.42 90.39 90.36 90.69 90.76 90.43 90.44 90.44 90.41 90.38 90.38 90.37 90.40 90.44 90.42 90.
Wavelength µm 2.855 2.862 2.868 2.874 2.881 2.887 2.894 2.900 2.907 2.913 2.920 2.926 2.933 2.940 2.946 2.953 2.960 2.966 2.973 2.980 2.987 2.994 3.001 3.008 3.015 3.022 3.029 3.036 3.043 3.050 3.057 3.065 3.072 3.079 3.087 3.094 3.101 3.109 3.116 3.124 3.131 3.139 3.146 3.154 3.162 3.170 3.177 3.185 3.193 3.201 3.209 3.217 3.225 Absorption % 89.26 89.24 89.25 89.23 89.24 89.26 89.24 89.19 89.22 89.20 89.22 89.24 89.20 89.21 89.17 89.17 89.17 89.17 89.15 89.12 89.14 89.17 89.14 89.11 89.09 89.08 89.08 89.
Wavelength Absorption Wavelength Absorption Wavelength Absorption Wavelength µm % µm % µm % µm 5.357 86.95 6.682 86.05 8.879 84.32 13.09 5.379 86.95 6.717 86.06 8.940 84.27 13.23 5.401 86.94 6.752 86.07 9.002 84.22 13.36 5.424 86.90 6.787 86.00 9.065 84.17 13.50 5.447 86.89 6.823 85.91 9.129 84.11 13.65 5.470 86.86 6.859 85.86 9.194 84.06 13.79 5.493 86.86 6.895 85.91 9.260 84.00 13.94 5.516 86.86 6.932 85.93 9.326 83.95 14.09 5.540 86.83 6.970 85.92 9.394 83.90 14.25 5.564 86.80 7.007 85.91 9.462 83.83 14.
