Halma Ocean Optics PX-2 User manual

PX-2
Pulsed Xenon Light Source
Installation and Operation Instructions
Description
The PX-2 Pulsed Xenon Light Source is a high flash rate, short-arc xenon lamp for applications
involving absorbance, reflection, fluorescence and phosphorescence measurements, and especially for
measuring optically or thermally labile samples.
The PX-2 has an SMA 905 Connector that couples to Ocean Optics miniature fiber optic
spectrometers and accessories, including optical fibers, cuvette holders, probes and other sampling
optics.
The PX-2 operates at speeds up to 220 Hz, offers excellent pulse-to-pulse stability, and has two trigger
modes for software control of the flash rate. Any external TTL positive pulse can be used to trigger the
PX-2. When it is coupled to a spectrometer, you can easily synchronize operation of both the light and
detector.
Because it produces a pulsed signal, the PX-2 is less likely to contribute to solarization in optical fiber
assemblies, which can occur when fibers are illuminated with signals less than 260 nm.
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PX-2 Installation and Operation Instructions
Parts Included
The PX-2 ships with the following items:
 PX-2 Pulsed Xenon Light Source
 12 VDC power adapter
 15-pin interface cable
Additional Accessories
The following are additional accessories available from Ocean Optics that you may need, depending
on your system set-up:
• USB2000/PX-2 adapter (USB-ADP-PX2)
• Replacement bulb (PX-2-B)
WARNING
The PX-2 produces ultraviolet radiation. Direct eye contact can cause permanent
eye damage. Always wear safety eyewear, and never look directly into the light
source.
Dangerous voltages are present in the PX-2. Do not operate the PX-2 without the
housing intact.
The SMA 905 Connector can get hot during operation. Allow the lamp to cool
after operation before handling.
Do not drop the instrument, as this may cause permanent damage to the unit.
Handle with care.
Using the PX-2
The following sections provide instructions on setting up and using the PX-2.
Connecting the PX-2
The set-up procedure differs, depending on whether you are connecting the PX-2 to an S2000,
USB2000/HR2000, or HR2000+/HR4000/QE65000 Spectrometer.
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PX-2 Installation and Operation Instructions
Connecting to an S2000 Spectrometer
►Procedure
1. Plug the 12 VDC power supply into a wall outlet, then connect the barrel connector on the
power supply to the rear of the PX-2.
2. Connect the 15-pin cable to the rear of the PX-2, and then connect the other end to the 15-pin
connector on the S2000 Spectrometer.
You have now connected the PX-2 for operation with the S2000 Spectrometer.
Connecting to a USB2000/HR2000 Spectrometer
►Procedure
Follow the steps below to connect the PX-2 to a USB2000/HR2000 Spectrometer:
1. Remove the PX-2 from the product packaging.
2. Connect the spectrometer’s 10-pin accessory connector to the USB-ADP-PX2 Adapter
OR
Connect the spectrometer to the DB15 cable assembly and connect the other end to the
PX-2’s 15-pin connector.
You have now connected the PX-2 for operation with the USB2000 or HR2000 Spectrometer.
Connecting to an HR2000+/HR4000/QE65000 Spectrometer
►Procedure
Follow the steps below to connect the PX-2 to an HR2000+/HR4000/QE65000 Spectrometer:
1. Remove the PX-2 from the product packaging.
2. Connect the spectrometer’s 30-pin accessory connector to the Breakout Box using the
Breakout Box Accessory cable.
OR
Connect the spectrometer to the DB15 cable assembly and the other end to the PX-2’s
15-pin connector.
You have now connected the PX-2 for operation with the HR2000+, or HR4000 or QE65000
Spectrometer.
Configuring the PX-2
After setting up the PX-2, you must configure it to operate with the spectrometer and software.
►Procedure
1. Connect an optical fiber to the SMA 905 Connector on the front panel of the PX-2.
2. Turn the PX-2 on via the power switch on the rear of the unit.
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PX-2 Installation and Operation Instructions
3. Select Multiple or Single TTL mode by moving the toggle switch on the rear of the light
source. You must also configure this mode in the operating software.
4. Download the latest version of OOIBase32, if necessary.
5. Configure OOIBase32 to operate the PX-2. Access the OOIBase32 setup. In the Configure
A/D dialog box, check the S2000 Strobe Enabled box.
Consult the OOIBase32 documentation for more information on system setup.
If properly configured, the lamp should flash and an audible “ping” sound should be heard.
TTL Mode Information
The PX-2 features a TTL switch that provides two modes of operation: Multiple mode and Single
mode.
Multiple Mode
In Multiple mode, the flash timing (pulse rate) is determined by the spectrometer:
• S2000 Spectrometer – Flash timing is determined by the JP3 jumper block setting. See
• All other OOI spectrometers – The Continuous strobe rate is either fixed or software
controlled. See
In either case, you must alter the spectrometer’s integration time so that a constant number of flashes
are observed during each integration period.
When using Multiple mode, you must ensure that a constant number of flashes occurs for each
integration cycle. This is accomplished by setting the pulse rate and integration time, which is
controlled by OOIBase32 operating software.
S2000 Spectrometer Strobe Rate Adjustments
To achieve a constant number of flashes per integration cycle, the integration time must be a multiple
of those shown in the following table.
Integration time must be a multiple of (in milliseconds)
S2000 JP3
Setting ADC500/SAD500 ADC1000 DAQ700 ADC2000-PCI
216 (factory
default) 128 64 512 32
214 32 16 128 8
212 8 4 32 2
210 N/A N/A
8
(with a minimum value
of 24 ms)
N/A
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PX-2 Installation and Operation Instructions
The PX-2 repetition rate is determined by the JP3 setting on the S2000 Spectrometer, but it is also
dependent on the frequency of the A/D card. The table below shows the repetition rate for the various
combinations of hardware and jumper settings. The default factory setting is 216:
Frequency (Hz)
JP3 Post # Function ADC500/SAD500 ADC1000 DAQ700 ADC2000-PCI
1 Not enabled – Reserved for future software control
2 Divide by 210 Too fast Too fast 98 Too fast
3 Divide by 212 122 Too fast 24 Too fast
4 Divide by 214 30 60 6.1 120
5 Divide by 216 7.6 15.2 1.5 30
Non-S2000 Spectrometer Strobe Rate Adjustments
The table below shows the Continuous Strobe frequency (multiple strobe operation) for each type of
OOI spectrometer.
Spectrometer Strobe Rate Adjustment
USB2000 Fixed at 122Hz1
USB2000+/USB4000 Software-controlled 220Hz-1Hz2
HR2000+/HR4000 Software-controlled 220Hz-1Hz2
QE65000 Software-controlled 220Hz-1Hz2
1Fixed frequency when the USB2000 is programmed with the PX2 firmware
2The maximum frequency of the PX2; the spectrometer can actually run faster
Single Mode
In Single mode, a single lamp flash occurs during each integration period. You can modify the flash
rate by changing the integration period. Since the PX-2 has a maximum repetition rate of 220 Hz, the
minimum integration time allowed in Single mode is 5 milliseconds.
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PX-2 Installation and Operation Instructions
PX-2 Specifications
Specification Value
Dimensions (mm) 153.4 x 104.9 x 40.9 mm
Weight 370 g
Power consumption 1.5 A @ 12 VDC
Power output
45 microjoules per pulse maximum
9.9 watts average power
220 Hz pulse rate maximum
Spectral range 220-750 nm
Pulse duration 5 microseconds (at 1/3 height of pulse)
Aperture 3 mm
Connector SMA 905
Bulb life (hours) 800 (deuterium); 2,000 (tungsten)
Time to stabilized output ~30 minutes
PX-2 Pinout Information
The following section contains information on the 15-pin connector on the PX-2.
Pin Number Description
1 Single strobe
2 Continuous strobe
10 Ground
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