ScienTECH Vector S200 Manual

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Series
Laser Power/Energy Meters
Setup and Operating
Procedures
Indicator Model No._____________
Serial No._____________
P/N9467J
5205

DETECTOR CALIBRATION DATA
Calorimeter # 1:
Model No:
Serial No:
Calibration Wavelength: nm
Output Sensitivity (S): V/W
Time Constant (1/e): sec.
Calibration Temp: °C
Sub. Heater Resistance (Rc): ohms
Sub. Heater Voltage (Vh): volts
Sub. Heater Wattage (Wh): watts
Calorimeter # 2:
Model No:
Serial No:
Calibration Wavelength: nm
Output Sensitivity (S): V/W
Time Constant (1/e): sec.
Calibration Temp: °C
Sub. Heater Resistance (Rc): ohms
Sub. Heater Voltage (Vh): volts
Sub. Heater Wattage (Wh): watts
Pyroelectric Detector # 1:
Model No:
Serial No:
Calibration Wavelength: nm
Output Sensitivity: V/J
Calibration Temp: °C
Pyroelectric Detector # 2:
Model No:
Serial No:
Calibration Wavelength: nm
Output Sensitivity: V/J
Calibration Temp: °C

Thank you for choosing a Scientech laser power and energy measurement system. The
Scientech employees are pleased to provide you with instruments designed and
manufactured for years of reliable service.
Please read this manual completely before using the equipment. This information will enable you to fully utilize
the instruments.
TABLE OF CONTENTS
ASTRAL CALORIMETER SPECIFICATIONS: .................................................................................................................................................. 1
VECTOR PYROELECTRIC DETECTOR SPECIFICATIONS............................................................................................................................ 2
UNPACKING AND SETUP...................................................................................................................................................................................... 4
FRONT PANEL CONTROLS .................................................................................................................................................................................. 6
RANGE ..................................................................................................................................................................................................................................... 6
MODE- ...................................................................................................................................................................................................................................... 6
FUNCTION ............................................................................................................................................................................................................................... 6
SELECT .................................................................................................................................................................................................................................... 7
COUNT UP COUNT DOWN.................................................................................................................................................................................................... 7
CANCEL ................................................................................................................................................................................................................................... 7
SAVE......................................................................................................................................................................................................................................... 8
OPERATING PROCEDURES ................................................................................................................................................................................. 8
HR Battery Installation .............................................................................................................................................................................................................. 8
Set Electrical Time Constants for Model PHF02, PHF05 and PHF09....................................................................................................................................... 9
CALIBRATION ...................................................................................................................................................................................................... 10
ATTENUATION FACTORS................................................................................................................................................................................... 10
TRANSFER CALIBRATION .................................................................................................................................................................................. 10
ENERGY MODE ................................................................................................................................................................................................... 11
POWER MODE ..................................................................................................................................................................................................... 12
VOLTS MODE....................................................................................................................................................................................................... 12
FUNCTION MENU CYCLES ................................................................................................................................................................................. 12
STATISTICS MODE.............................................................................................................................................................................................. 13
ANALOG TUNE BAR ............................................................................................................................................................................................ 13
DISPLAY BACKLIGHTING.................................................................................................................................................................................... 13
ANALOG OUTPUT................................................................................................................................................................................................ 14
JOULEMETER SENSOR OPERATION WITH OSCILLOSCOPE......................................................................................................................... 14
CALIBRATION USING ELECTRIC SUBSTITUTION HEATING ........................................................................................................................... 15
OPERATION OF ASTRAL CALORIMETERS WITH A DIGITAL VOLT METER................................................................................................... 15
OPERATION OF ASTRAL CALORIMETERS WITH AN ANALOG CHART RECORDER .................................................................................... 16
CALORIMETER RESPONSE................................................................................................................................................................................ 16
1. Numerical Integration.......................................................................................................................................................................................................... 17
2. Initial Voltage Interpolation................................................................................................................................................................................................. 17
3. Peak Voltage Estimate......................................................................................................................................................................................................... 17
CALORIMETER DAMAGE CONSIDERATIONS................................................................................................................................................... 18
1. Surface Absorbers................................................................................................................................................................................................................ 18
2. Volume Absorbers ............................................................................................................................................................................................................... 18
REMOTE INTERFACE.......................................................................................................................................................................................... 21
MODEL S200 MENU TREES................................................................................................................................................................................ 35
MODEL D200P MENU TREES ............................................................................................................................................................................. 36
MODEL D200PC MENU TREES........................................................................................................................................................................... 37
MODEL D200C MENU TREES ............................................................................................................................................................................. 38
LIMITED WARRANTY........................................................................................................................................................................................... 39
R
ETURNED GOODS PROCEDURE .................................................................................................................................................................... 39

1
Astral Calorimeter Specifications:
Model A C 2500 A C 25H D A C X 25H D A C 2501 A C X 2501 A C 25U V A C 2504
TypeAbsorber Surface Surface Surface V olum e V olum e V olum e V olum e
MaxB eam Diam eter 25 mm 25mm 8mm 25mm 8mm 25mm 25mm
SpectralR esponse .25-35 µm .19-12 µm .4-2 µm .266-1.2 µm .4-1.2 µm .19-.36 µm .85-4.2 µm
Average Power(m ax) 10 W
Average Power(min)*1mW
Noise Level 10 µW orµJ
PowerDensity (m ax) 200 W/cm ² 1.5 kW /cm ² 12 kW /cm ² N ote 1Note 2Note 3Note 4
Peak PowerDensity (m ax) 1 MW/cm ² 100 MW/cm ² 800 MW/cm ² N ote 58.5 GW /cm ² N ote 6Note 7
Single Pulse Energy (m ax) 10 J
Energy Density (max) Note 8Note 9Note 10 N ote 11 N ote 12 N ote 13 N ote 14
Precision < 1%
A ccuracy 3%
R esponse Time 3sec (ifattached to a Scientech indicatorand indicatoris in watts mode)
DimensionsDxL (in.)3.75 x 2.23.75 x 2.23.75 x 3.82 3.75 x 2.23.75 x 3.82 3.75 x 2.23.75 x 2.2
(cm ) 9.53 x 5.69.53 x 5.69.53 x 9.79.53 x 5.69.53 x 9.79.53 x 5.69.53 x 5.6
Weight(lbs) 1.51.51.71.51.71.51.5
(kgs) 0.68 0.68 0.77 0.68 0.77 0.68 0.68
IndicatorCompatibility H 310,H 310D ,H 410,H410D,S310,S310D ,D 200PC,D 200C
Model A C 5000 A C 50H D A C X 50H D A C 5001 A C X 5001 A C 50U V A C 5004
TypeAbsorber Surface Surface Surface V olum e V olum e V olum e V olum e
MaxB eam Diam eter 50 mm 50mm 16mm 50mm 16mm 50mm 50mm
SpectralR esponse .25-35 µm .19-12 µm .4-2 µm .266-1.2 µm .4-1.2 µm .19-.36 µm .85-4.2 µm
Average Pow er(m ax) 30 W
Average Pow er(min) 100 mW
Noise Level 1mW ormJ
PowerDensity (m ax) 200 W/cm ² 1.5 kW /cm ² 12 kW /cm ² N ote 1Note 2Note 3Note 4
Peak PowerDensity (m ax) 1 MW/cm ² 100 MW/cm ² 800 MW/cm ² N ote 58.5 GW /cm ² N ote 6Note 7
Single Pulse Energy (m ax) 30 J
Energy Density (max) Note 8Note 9Note 10 N ote 11 N ote 12 N ote 13 N ote 14
Precision < 1%
A ccuracy 3%
R esponse Time 3sec (ifattached to a Scientech indicatoroperating in watts mode)
DimensionsDxL (in.)4.75 x 2.34.75 x 2.34.75 x 3.92 4.75 x 2.34.75 x 3.92 4.75 x 2.34.75 x 2.3
(cm ) 12.07 x 5.812.07 x 5.812.07 x 9.96 12.07 x 5.812.07 x 9.96 12.07 x 5.812.07 x 5.8
Weight(lbs) 2.92.93.12.93.12.92.9
(kgs) 1.31.31.41.31.41.31.3
IndicatorCompatibility H 310,H 310D ,H410,H 410D ,S310,S310D ,D200PC,D200C
*Calorimeterinstalled in an Isoperibolenclosure
Note 1: A C 2501,A C5001 30 W/cm 2@ 1064nm , 23 W/cm 2@ 532nm , 8.5 W/cm 2@ 355nm , 175m W /cm 2@ 266nm
Note 2: A C X 2501,A CX 5001 N ote 1 specs x 8 for400nm to 1.2um
Note 3: AC25UV,AC50UV 50 W/cm 2@ 355nm
Note 4: A C 2504,A C5004 35W /cm 2@ 1064nm
Note 5: A C 2501,A C5001 100G W /cm 2@ 1064nm , 78G W /cm 2@ 532nm , 29G W /cm 2@ 355nm , 580M W /cm 2@ 266nm
Note 6: AC25UV,AC50UV Forrepetitive pulses; 101M W /cm 2@ 355nm
Forsingle pulses; 305G W /cm 2@ 355nm
Note 7: A C 2504,A C5004 125G W /cm 2@ 1064nm
Note 8: A C 2500,A C5000 MaxJ/cm 2= 1000 x (pulse width)
1/2to a maximum of200 J/cm 2.
Note 9: AC25HD,AC50HD MaxJ/cm 2= 4500 x (pulse width)
1/2to a maximum of14 J/cm 2.
Note 10:ACX25HD,ACX50HD MaxJ/cm 2= 36,000 x (pulse width)
1/2to a maximum of42.5 J/cm 2.
Note 11: A C 2501,A C5001 Forrepetitive pulses:4.1 J/cm 2@ 1064nm , 3.2 J/cm 2@ 532nm , 1.2 J/cm 2@ 355nm ,
24m J/cm 2@ 266nm
Forsingle pulses:8 J/cm 2@ 1064nm , 6.2 J/cm 2@ 532nm , 2.3 J/cm 2@ 355nm ,
46m J/cm 2@ 266nm
Note 12: A C X 2501,ACX5001 Note 11 specs x 8 for400nm to 1.2um
Note 13: AC25UV,A C50U V Forrepetitive pulses; 1.1J/cm 2@ 355nm
Forsingle pulses; 40J/cm 2@ 355nm
Note 14: A C 2504,A C5004 Forrepetitive pulses; 4.8J/cm 2@ 1064nm
Forsingle pulses; 10J/cm 2@ 1064nm

2
Vector Pyroelectric Detector Specifications
M odel PH F 02 PH F 05 PH F 09 P 05 P 09
Active D iam eter 2 m m 5 m m 9 m m 5 m m 9 m m
V oltage R espon se 3.0 V /m
J
0
.8 V / m
J
S,I 15 V/m J 2.5 V/m J 1 V/m J
L .1 5 V / m
J
.025 V/m .01 V/m J
ElectricalD ecay Tim e 2.0 m se
c
2
.0 m s e c
(RC Tim e Constant)
S
0
.0 5 m s e
c
0.05 m sec
0
.0 5 m s e c
I 0.5 m sec 0.5 m sec 0.5 m sec
L 2.5 m sec 2.5 m sec 2.5 m sec
Noise E quivalentE nergy 15 nJ 35 nJ
S , I 3 n J 1 5 n J 3 5 n J
L 150 nJ 750 nJ 3500 nJ
Rep R ate (m ax) 400 pps 200 pps
S 4000 pps 4000 pps 4000 pps
I 400 pps 400 pps 400 pps
L 80 pps 80 pps 80 pps
Pu lse W idth (m ax) 50 µ sec
1
00 µ sec
(F or C alibrated R espon se)
S 5 µ sec 5 µ sec 5 µ sec
I 50 µsec 50 µsec 50 µsec
L 250 µsec 250 µsec 250 µsec
V oltage O utput (m ax.) 4.5 V
A v e ra g e P o w e r (m a x ) 1 W 2 W 2 W 2 W 2 W
Accuracy 7% 7% 7% 5% 5%
M axim u m E n ergy D en
s
Indicator Com patibility S310,S310D ,D 200PC ,D 200P
M ax J/cm 2=316 x (pulse w idth)
1/2
Model P25 PH F 25 PH D 25 PH D X 25 PH D X25U V SP 25 SPHF 25 SPHD 25
MaxBeam Diam eter 25 m m 25 m m 25 mm 7m m 7m m 25 m m 25 m m 25 mm
SpectralR espon se U V to m id -IR .4 -2 u m U V to m id-IR
Average Power(max) 5W* 5W* 5W* 5W* 5W* 5W* 5W* 5W*
Noise Equivalent Energ
y
4 µJ
EnergyDensity (m ax) N ote 2 N ote 3 N ote 4 N ote 2
Accuracy 5% 5% 8% ^ 8% ^ 8% ^ 5% 5% 8% ^
OutputSensitivity 8 V/J 8 V/J 2 V/J 2 V/J 2 V/J 8 V/J 8 V/J 2 V/J
Rep Rate(m ax) 100 pps 400 pps 40 pps 40 pps 40 pps 100 pps 400 pps 40 pps
Pulse Duration (max) 0.2 m sec
0
.045 mse
c
0.2 m sec 0.2 m sec 0.2 m sec 0.2 m sec
0
.045 mse
c
0.2 m sec
Dimensions (in.)
2
.4dia.x2.3
L
2
.4dia.x2.3
L
2
.4dia.x2.3
L
2
.4dia.x3.9
L
2.4D x3.9L
2
.3x2.3x0.
6
2
.3x2.3x0.
6
2
.3x2.3x0.
6
(cm )
6
.1dia.x5.8
L
6
.1dia.x5.8
L
6
.1dia.x5.8
L
6
.1dia.x9.9
L
6.1D x9.9L
5
.8x5.8x1.
4
5
.8x5.8x1.
4
5
.8x5.8x1.
4
Weight (lbs) 0.90.90.91.11.10.30.30.3
(kgs) 0.41 0.41 0.41 0.50.50.14 0.14 0.14
In d icator C om patibility H 310,H 310D ,H 410,H 410D ,S310,S310D ,D 200PC,D 200P
Model P50 PH F 50 PH D 50 PH D X 50 PH D X50U V SP 50 SPHF 50 SPHD 50
MaxBeam Diam eter 50 m m 50 m m 50 m m 15 m m 15 m m 50 m m 50 m m 50 mm
SpectralR espon se U V to m id -IR .4 -2 u m U V to m id-IR
Average Power(m ax) 10 W * 10 W * 10 W * 10 W * 10 W * 10 W * 10 W * 10 W*
Noise Equivalent Energ
y
EnergyDensity (m ax) N ote 2 N ote 3 N ote 4 N ote 2
Accuracy 5% 5% 8% ^ 8% ^ 8% ^ 5% 5% 8% ^
OutputSensitivity 2 V/J
Rep Rate(m ax) 50 pps 400 pps 20 pps 20 pps 20 pps 50 pps 400 pps 20 pps
Pulse Duration (max) 0.4 m sec
0
.045 mse
c
0.4 m sec 0.4 m sec 0.4 m sec 0.4 m sec
0
.045 mse
c
0.4 m sec
Dimensions (in.)
3
.5dia.x2.3
L
3
.5dia.x2.3
L
3
.5dia.x2.3
L
3
.5dia.x3.9
L
3
.5dia.x3.9
L
3x3x0.6 3x3x0.6 3x3x0.6
(cm )
8
.8dia.x5.8
L
8
.8dia.x5.8
L
8
.8dia.x5.8
L
8
.8dia.x9.9
L
8.8diax9.9L
7
.6x7.6x1.
5
7
.6x7.6x1.
5
7
.6x7.6x1.
5
Weight (lbs) 1.51.51.51.71.70.40.40.4
(kgs) 0.68 0.68 0.68 0.77 0.77 0.18 0.18 0.18
In d icator C om patibility H 310,H 310D ,H 410,H 410D ,S310,S310D ,D 200PC,D 200P
*F u llillum ination ofth e sensor
^Beam centered on absorber
Note1: MaxJ/cm 2=316 x (pulse w idth)
1/2
Note2: HD models M ax J/cm 2= 4500 x (pulse width)
1/2 to a maximum of1.4 J/cm 2.
Maximum pulse w idth ofth e pyroelectric detector m u st be observed.
Note3: HDX models M ax J/cm 2= 36,000 x (pulse w idth)
1/2 to a maximum of1 2 .6 J / c m 2.
Maximum pulse w idth ofth e pyroelectric detector m u st be observed.
Note4: HDXUV model
s
M ax J/cm 2= 18,000 x (pulse w idth)
1/2 to a maximum of5.6 J/cm 2.
Maximum pulse w idth ofth e pyroelectric detector m u st be observed.
Note1 Note1
Note1 Note1
16 µJ

3
ABSORPTION OF HD ABSORBER vs WAVELENGTH
50
55
60
65
70
75
80
85
90
95
100
200 210 250 300 305 310 315 325 335 350 355 360 385 400 420 440 450 500 530 545 550 595 600 610 635 650 675 850
1060 1300 1480 2000 2100
10600
WAVELENGH [nm]
% ABSORPTION
CAUTION: SPECULAR REFLECTION
NOTE: Please exercise caution when using HD detectors. They exhibit
spectral reflection of between 7% and 33%, of the input power, back
out of the aperture. Please refer to figure above 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 in the
CO2wavelength.
CE Mark Certification: All of the detectors listed in this manual have been
certified for the european CE mark except the following:
All of the Vector Series slim profile pyroelectric detectors: Models:
SP25, SPHF25, SPHD25, SP25YAG, SP25UV, SP25AL, SP50, SPHF50, SP50YAG,
SP50UV, SP50AL.

Unpacking and Setup
The indicator and the sensor and accessories are packed in corrugated supports. All packing material should
be saved for future damage free shipments.
Before making any connections, verify that the power (VAC) requirement shown on the power entry module
is compatible with the actual AC power outlet to which the indicator will be connected. The power requirement
of the instrument is easily change by removing the fuse holder and voltage selector which is the center
portion of the power entry module. To remove, insert a screwdriver into the slot on the right side of the
fuseholder and pry out. Slide the voltage selector out, flip over and re-insert into the fuse holder. Plug the
fuseholder back into the power entry module.
Connect the removable power line cord between the power entry module and a grounded AC outlet.
Defeating the ground plug on the line cord will adversely effect the performance of the indicator.
MODELS S200 and D200P
BNC interconnect cables are included with the pyroelectric sensors. Connect the cable between the
pyroelectric sensor and the input and the input connector of the indicator. With the dual channel ratiometer
Model D200P choose either channel A or B. Using an interconnect cable with a different length will
change the capacitance and therefore the joulemeter calibration by a factor of 0.8%/ft. for the 25 mm
sensors and 0.2%/ft. for the 50 mm sensors.
Set the rear panel input switches to the 1 MΩand SLOW settings when using the Models P25, SP25, P50,
SP50, PHD25, SPHD25, PHD50, and SPHD50 sensors. Set the input switches to the 1 MΩand FAST
settings when using the Models PHF25, SPHF25, PHF50, and SPHF50. Set the input switches to the 50Ω
and FAST settings when using Models P05,.P09, PHF02, PHF05, PHF09.
4

MODEL D200PC
Any Scientech Vectorpyroelectric sensor may be connected to channel A and any Scientech Astral
calorimeter to channel B. The input switches on channel A should be configured per the previous instructions
for the S200 and D200P set up. The interconnect cable for the calorimeter terminates with mini-DIN
connectors. The "D" shaped connector shows the orientation for hook-up.
MODEL D200C
Both channels of the D200C are dedicated for use with any Astralcalorimeters. Any model can be
connected to either channel.
5

Operation
FRONT PANEL CONTROLS
RANGE
Pressing the RANGE button begins a cycle through 6 ranges in the pyroelectric channel or 5 ranges in the
calorimeter channel. In the pyroelectric channel if the 1 MΩinput impedance is selected the range cycle is 2
m, 20 m, 200 m, 2, 20, AUTO. If the 50Ωinput impedance is selected, the range cycle is 2 µ, 20 µ, 200 µ, 2
m, 20 m, AUTO. In the calorimeter channel if a 25 mm calorimeter is connected the range cycle is 10 m, 100
m, 1, 10, AUTO (watts mode only). If a 50 mm calorimeter is connected the range cycle is 30 m, 300 m, 3,
30, AUTO (watts mode only). When the desired range appears in the display, press the SELECT button to
activate that range. When the AUTO range is selected, the indicator automatically selects the most
appropriate range with the greatest resolution. Therefore, as the displayed values reach a boundary, the
indicator will automatically switch to the next higher or lower range as appropriate. In a manual range,
-OF- will appear in the display if the input laser power or energy level exceeds the range capability.
MODE-
MODE-MODELS S200, D200P
Pressing the MODE button begins a cycle between MODE and CAL. Pressing the SELECT button when
MODE appears in the display
begins a cycle of VOLTS, ENERGY, AVG ENERGY, AVG POWER. Pressing the SELECT button when the
desired mode appears activates that mode. Pressing the SELECT button when CAL appears in the display
begins a cycle of V/mJ, V/J, ATTEN. Pressing the SELECT button when the desired calibration mode
appears activates that mode.
MODE-Model D200PC
Pressing the mode button when setting up channel A is the same as the S200 and D200P. Pressing the
mode button when setting up channel B begins a cycle of AVG POWER, ENERGY. Pressing the SELECT
button when the desired mode appears activates that mode.
MODE-Model D200C
Same as channel B of D200PC.
FUNCTION
FUNCTION-Model S200
6

Pressing the FUNCTION button begins the menu cycle of STATS, TUNE BAR, E, REMOTE (only if optional
digital output is installed). Press the SELECT button when the desired function annunciator appears in the
display.
FUNCTION-Model D200P
Pressing the FUNCTION button begins the menu cycle of CH AB RATIO, STATS TUNE BAR LOG E
REMOTE, TRIG A TRIG B.
Pressing SELECT when CH AB RATIO appears allows selection of channel A, channel B, the ratio of A/B or
B/A.
Pressing SELECT when STATS TUNE BAR LOG E REMOTE appears allows selection of the statistics
mode, analog tune bar, log units, display in scientific notation, RS232 and IEEE488 configuration.
Pressing SELECT when TRIG A TRIG B appears allows selection of the trigger channel.
FUNCTION-Model D200PC
Pressing the FUNCTION button when in channel A is identical to the D200P. Pressing the FUNCTION button
when in channel B begins the menu cycle of STATS, TUNE BAR, E, REMOTE. Press SELECT when the
desired function appears to activate it.
FUNCTION-Model D200C
Same as channel of D200PC.
SELECT
Activates a particular mode or function. Also turns the display backlighting on and off.
COUNT UP COUNT DOWN
Allows numeric entry into the display when in the calibration mode, statistics mode, or average energy mode.
CANCEL
If pressed during any menu cycle the indicator will return to its previous mode of operation. Pressing the
CANCEL button is also the exit out of the statistics mode and is used to zero the display.
7

SAVE
Press the SAVE button to save the current setup to memory. This enables you to power cycle the indicator
and return to the same indicator setup. The SAVE button must also be pressed after a calibration.
OPERATING PROCEDURES
Joulemeter sensor models P25, P50, SP25, SP50 P05,and P09 are coated with a special black absorbing
material which provides a very flat spectral response over a broad wavelength band. The PHF25, PHF50,
SPHF25, SPHF50,PHF02, PHF05, and PHF09 have a partially absorbing and partially reflecting chromium
coating. The relative spectral responses of these sensors are given in Figure 1.
RELATIVE SPECTRAL RESPONSE
20
30
40
50
60
70
80
90
100
0.1 1 10 100
WAVELENGTH [microns]
PERCENT ABSORPTION
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
Figure 1
Before using you Vector joulemeter system, please review the energy density ratings given in the chart on
page 2, which apply to all models of Vector pyroelectric joulemeter sensors. Familiarize yourself with all of the
specifications of the sensor models which you are using (given at the front of this manual).
HR Battery Installation
A 9 volt alkaline battery comes installed with all HR Series detectors. Always select the OFF position of the
power switch when the detector is not in use to spare the lifetime of the battery. Replace the battery when
the low battery LED indicator lights up.
8

Remove the two slotted 4-40 binder head screws located on the underside of the detector. Pull off the outer
housing to expose the battery. Remove the used battery from the battery holder and snap in the new battery.
Slide the outer housing back in to place and secure with the screws.
Figure 2
Do not touch the delicate pyroelectric crystals in the HR Series detectors. They should only be cleaned with
a stream of clean air; nitrogen or CO2.
Set Electrical Time Constants for Model PHF02, PHF05 and PHF09
The range switch located on the rear of the PHF02, PHF05, and PHF09 detectors selects one of three
electrical time constants and should be set as follows:
S (Short Pulses): Select for pulse durations of 5 µsec. or less. Repetition rates up to 4 kHZ can be
measured.
I(Intermediate Pulses): Select for pulse durations of 50 µsec. or less. Repetition rates of up to 400 HZ
can be measured.
L(Long Pulses): Select for pulse durations of 250 µsec. or less. Repetition rates of up to 80 HZ can be
measured.
There are no range settings on the P05 and P09 detectors which utilize a highly absorbing material on the
crystal. The pulse duration considerations merely function in the determination of damage thresholds.
Repetition rates up to 100 HZ using the P05 and 50 HZ using the P09 can be measured.
9

Calibration
Calibration-MODELS S200, D200P
Press the MODE button. When the CAL annunciator appears press the SELECT button. A menu of V/mJ,
V/J, ATTEN will cycle. When calibrating for joulemeter sensor models P25, PHF25, SP25, SPHF25, P50,
PHF50, SP50, and SPHF50, press the SELECT button when the V/J annunciator appears. Use the COUNT
UP, COUNT DOWN buttons to enter into the display the V/J output sensitivity listed on the sensor ID tag.
Press the SELECT button. PRESS THE SAVE BUTTON TO SAVE THE CALIBRATION IN THE EPROM
MEMORY. To calibrate Molectron J3 series sensors, select the V/mJ annunciator and enter the V/mJ output
sensitivity as described above.
Calibration-Models D200PC, D200C
Use the same procedure as above when calibrating channel A of Model D200PC.
Channel B of the Model D200PC and both channels of Model D200C are calibrated as follows. The time
constant values listed on the serial tag of the Astral calorimeters, must be entered into memory. If not in
energy mode, enter into energy mode by pressing the MODE button. When the ENERGY annunciator
appears, press the SELECT button. Press the MODE button. A menu of MODE, CAL will cycle. Press the
SELECT button when the CAL annunciator appears. SET CAL will appear in the display. Use the COUNT
UP, COUNT DOWN buttons to enter into the display the time constant value listed on the calorimeter ID tag.
Press the SELECT button to enter the new value. PRESS THE SAVE BUTTON TO SAVE THE
CALIBRATION IN THE EPROM MEMORY.
Attenuation factors
Entering Attenuation Factors-Models S200, D200P, D200PC
When attenuators are used in conjunction with the joulemeter sensors, the attenuation factor may be entered
into the indicator memory to allow the actual (pre-attenuated) power/energy level to be displayed. To enter
attenuation factors, follow the same procedure as the V/J calibration except press the SELECT button when
the ATTEN annunciator appears in the display. Use the COUNT UP, COUNT DOWN buttons to enter the
desired attenuation factor into the display. For example, if you were using a 4X attenuator, you would enter
4.0 into the display. Press the SELECT button to enter the attenuation factor into memory. PRESS THE
SAVE BUTTON TO ENTER THE FACTOR INTO EPROM MEMORY. The attenuation calibration applies to
pyroelectric sensors only.
Transfer Calibration
The Vector Indicators' pyroelectric channels can be calibrated in the average power mode by setting the
power reading to match that of a calorimeter which has had its calibration certified at the National Institute of
Standards and Technology. A typical setup would be to direct the laser beam into a calibrated beam splitter.
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A portion of the beam would be measured by the transfer standard while the other portion is directed into the
pyroelectric joulemeter.
Select the average power mode by pressing the MODE button. Press the SELECT button when the mode
annunciator appears. The menu will cycle through VOLTS, ENERGY, AVG ENERGY, and AVG POWER.
Press the SELECT button when the avg power annunciator appears. Select the AUTO range by pressing the
RANGE button. Press the SELECT button when the AUTO annunciator appears in the display. Press the
MODE button. Press the SELECT button when the CAL annunciator appears. The menu will cycle through
V/mJ, V/J, ATTEN, and AVG POWER. Press the SELECT button when the AVG POWER annunciator
appears. Use the COUNT UP COUNT DOWN buttons to change the power reading to match that of the
transfer standard. PRESS THE SAVE BUTTON TO ENTER THE CALIBRATION INTO EPROM MEMORY.
Energy Mode
Energy Mode - S200, D200P
Select the appropriate range for the energy levels to be measured. Auto range may be selected if the energy
levels of repetitive pulses are to be measured. However, do not select auto range if you want to measure the
energy of one single shot at a time. Select the energy mode by pressing the MODE button. A menu cycle of
MODE, CAL will begin. Press the SELECT button when MODE appears in the display. A menu cycle of
VOLTS, ENERGY, AVG ENERGY, AVG POWER will begin. Press the SELECT button when ENERGY
appears in the display.
The energy level of each pulse will now be displayed on the front panel LCD display (up to 40 HZ). The
RS232 can transmit data at repetition rates up to 80 HZ, IEEE488 up to 100 HZ, and STATS mode can
collect data at repetition rates up to 200 HZ.
Energy Mode - Model D200PC
Energy mode in channel A (dedicated to pyroelectric sensors) is the same as above. Energy mode in channel
B (calorimeter channel) will display the energy of one single pulse at a time. You must wait a few seconds to
several seconds between shots depending upon the time constant of the calorimeter you are using. If the
pulse to pulse energy values decrease, increase the time between firing pulses. Pressing the MODE button
begins a cycle of ENERGY, POWER. Press the SELECT button when the ENERGY annunciator appears.
Make sure you have entered the calorimeter time constant as explained in the calibration section.
Each calorimeter has a different time constant.
Energy Mode - D200C
Same as Channel B above.
Average Energy Mode - Models S200, D200P, D200PC
The average energy mode displays a running average of a selectable number of pulses from 2 to 9999. Enter
into the AVG ENERGY mode by following the same procedure as ENERGY mode only press the SELECT
button when the AVG ENERGY annunciator appears. The number of pulses to be averaged will appear in
the display. To change the number, press the COUNT UP, COUNT DOWN buttons. When the desired
number of pulses to be averaged appears in the display, press the SELECT button. To change the number of
pulses to be averaged during any run, simply press the COUNT UP, COUNT DOWN buttons.
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The AVG ENERGY mode in the D200PC only exists in channel A - the pyroelectric channel.
Power Mode
Average Power Mode - Models S200, D200P, D200PC (channel A)
Select the appropriate range for the average power level to be measured. The average power mode displays
the average power (watts) of repetitively pulsed lasers Minimum rep rate of 10 pps). To enter into the average
power mode, follow the same procedure as the energy mode except press the SELECT button when the
AVG POWER annunciator appears.
Power Mode - Models D200C,
D200PC (channel B)
The power mode displays the average power level of repetitively pulsed lasers or the power level of CW
lasers. Enter into the power mode by following the same procedure as energy mode only press the SELECT
button when the POWER annunciator appears.
Volts Mode
Volts Mode - Models S200, D200P, D200PC (channel A)
The volts mode displays the peak voltage of the pyroelectric joulemeter sensor. To enter into the volts mode,
follow the same procedure as energy mode except press the SELECT button when the VOLTS annunciator
appears.
Function Menu Cycles
Pressing the FUNCTION button begins menu cycles which allows the selection of channel A, channel B or
ratios (dual channel models), statistics mode, tune bar, log units (ratio mode), display in scientific notation,
and digital output configuration. The menu cycles are as follows:
Model S200: STATS TUNE BAR E REMOTE
Press the FUNCTION button to begin the above menu cycle. Press the SELECT button to activate the
statistics mode (STATS), the analog tune bar (▄▄▄▄▄▄), display in scientific notation (E), digital output
configuration (REMOTE). To change any condition, re-select it. For example, if the tune bar is active and you
want to de-activate it, press the FUNCTION button to start the menu cycle, then press SELECT when the
tune bar annunciator appears.
Model D200P: CH AB RATIO
STATS TUNE BAR LOG E REMOTE
TRIG A TRIG B
Channel Selection: Press the FUNCTION button to begin the above menu cycle. Press the SELECT button
when the CH AB RATIO annunciator appears in the display. This begins the cycle of CH A CH B RATIO A/B
RATIO B/A. Press the SELECT button when the desired annunciator appears to activate channel A
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(CH A), channel B (CH B), the ratio of channel A to channel B (RATIO A/B), or the ratio of channel B to
channel A (RATIO B/A).
Trigger Channel Selection: Press the FUNCTION button to begin the menu cycle. Press the SELECT button
when the TRIG A TRIG B annunciator appears. A cycle of TRIG A, TRIG B will begin. Press the SELECT
button when the desired trigger channel annunciator appears. If you are operating only one channel at a
time, the trigger channel of the channel in operation must be selected.
Models D200PC and D200C: CH AB RATIO, STATS TUNE BAR LOG E REMOTE
Press the FUNCTION button to begin the above menu cycle. Press the SELECT button to configure the
indicator as desired.
Statistics Mode
The statistics mode will collect data on a selectable pulse population of up to 1000 pulses. At your prompting,
the indicator will display the number of pulses delivered, average energy, maximum energy, standard
deviation, and coefficient of variation. When the statistics mode is selected, the energy mode and AUTO
range are automatically activated regardless of the mode and range settings prior to the selection of statistics
mode.
Use the FUNCTION button to begin the menu cycles as explained in the Function Menu Cycles section.
Press the SELECT button when the STATS annunciator appears to activate the statistics mode. Use the
COUNT UP COUNT DOWN buttons to change the display to the desired number pulses (up to 1000). Press
the SELECT button to enter the pulse population to memory. Press the FUNCTION button to begin the run.
The indicator will automatically stop when the data has been collected. Pressing the SELECT button recalls
the data to the display. The SELECT button must be pressed to recall each event. Once all of the data has
been recalled, pressing the FUNCTION button starts a new run. Pressing the CANCEL button returns the
indicator to the mode of operation in effect prior to statistics mode.
Analog Tune Bar
The tune bar graphically depicts any measured change in power by the indicator. To activate or de-activate
the tune bar press the FUNCTION button to begin the menu cycles as described in the Function Menu
Cycles section. Press the SELECT button when the
▄▄▄▄▄▄▄▄▄annunciator appears.
Display Backlighting
Pressing the SELECT button when the indicator is not in a menu cycle turns the backlighting on and off.
Press the SELECT button down until the display light is on or off then release.
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Log Units of Measure
When a dual channel indicator is being used as a ratiometer, log units of measure may be displayed. Use the
FUNCTION button to start the menu cycles as described in the Function Menu Cycles section. Press the
SELECT button when the LOG annunciator appears.
Analog Output
Pyroelectric Channels
Analog output is accessible from the 50 ohm terminated BNC connector on the rear panel labeled Analog
Output. The analog output is calibrated to 10 volts full scale on all ranges.
The 50 ohm terminated BNC connector labeled Pulse Out provides a profile of the analog signal from the
pyroelectric sensor. The peak voltage level is set to 10 volts full scale on all ranges.
Calorimeter Channels
In power mode, the analog output is calibrated to 10 volts full scale and is accessible via the 50 ohm
terminated BNC connector labeled Analog Output. In energy mode, the analog output is an amplified voltage
signal representative of the voltage generated by the calorimeter thermopile. To calculate energy using the
analog output, follow the equation:
1 (10/30 range)
J = (Vpk)(TC) ÷10 ÷10 (1/3 range)
Cal 100 (.1/.3 range)
1000 (.01/.03 range)
where:
Vpk is the peak voltage, TC is the time constant listed on the calorimeter serial tag, and Cal is the calorimeter
output in V/W.
The analog output is set at Scientech and should not be adjusted without consulting the factory.
Joulemeter Sensor Operation With Oscilloscope
The joulemeter sensors may be hooked-up directly with a 1 MΩinput oscilloscope. The peak output voltage
of the sensor divided by the V/J sensitivity = energy (joules).
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Calibration Using Electric Substitution Heating
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.
1 Remove the screws holding the calorimeter’s ID tag and remove the plate to expose the circuit board.
2 Connect the calorimeter to the indicator, turn the power on and let the system equilibrate.
3 Connect theDVM to the test points labeled SUB and HTR on the calorimeter circuit board.
4 Measure the resistance of the substitution heater making sure to subtract the resistance of the patch
cables from the total resistance measurement. Compare this resistance to Rcin the calibration data in front
of the manual. The two should agree within 2%. If not contact Scientech.
5 Remove the DVM. Connect a power supply to the SUB and HTR test points and connect the DVM to
monitor the power supply.
6 Set up the indicator in Watts Mode and 10 range for 25mm calorimeters or 3 range for 50mm
calorimeters.
7 Apply Vhvolts in the stated calibration data, to the substitution heater.
8 Adjust the calibration trim pot, R4 on the calorimeter board, until WhWatts, from the calibration data, is
displayed on the indicator.
Operation of Astral Calorimeters with a Digital Volt Meter
Astral calorimeters are powered up by the indicator. To use the calorimeter with a digital volt meter or chart
recorder as a read out, you must apply +/- 8 VDC to the calorimeters connector on pins 5 & 4 as show in Fig.
3. The voltage output of the calorimeter is available on pins 6 and 8 as shown below.
* Connect the output of the calorimeter to the DVM using the adaptor cable.
* Select the DC volts mode.
* Direct the laser beam on to the absorbing surface of the calorimeter.
* When the display of the DVM has stabilized (about 1 1/2 minutes), calculate the laser power using
the formula:
W=V/S
where:
W=Laser power in watts
V=Voltage reading of the DVM in mV
S=Sensitivity of the calorimeter which is
0.5 V/W for 25 mm calorimeters and
0.167 V/W for the 50 mm calorimeters.
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Figure 3
Operation of Astral Calorimeters with an Analog Chart Recorder
Figure 4
Calorimeter Response
The response of a calorimeter to a single pulse input as displayed by a chart recorder appears as in Figure 4.
The output voltage from a chart recorder can be converted to wattage at any time by:
W=V/S, Wi=Vi/S
V=Chart recorder voltage level in mV
S=Calorimeter sensitivity in mV/W
The total energy (E) in the pulse can be found by integrating the instantaneous wattage over time:
∞
E=∫W(t) dt
0
The following methods may be used to compute the total integrated energy:
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