Ocean Optics S2000 - Manual (Page 111)

Configure Data Acquisition from the menu.
4. Select Spectrum | Configure Data Acquisition from the menu. Choose the External Trigger page and select
Synchronization.
5. To save processed data with each external trigger, enable the Automatically save file on trigger box. If you
enable this function, you will be presented with a file save dialog box with each trigger. To avoid manually
naming a file for each trigger, you can enable the Autoincrement Filenames function by selecting File |
Autoincrement Filenames | Enabled from the menu. Choose a base name and starting index for the
autoincremented files.
6. Once you select an external trigger mode, it will appear on your computer that your spectrometer is
unresponsive. Instead, it is waiting for the trigger. Activate your triggering device. The acquisition parameters,
name of the window acquiring data and trigger mode are displayed in the main status bar.
In this edge-triggered mode, the spectrometer is idle until you apply a trigger to the spectrometer. With each
trigger, the following occurs:
1.
the spectrometer is cleared and then begins integrating
2. the spectrometer integrates for a fixed period of time, determined by the jumpered pins on the spectrometer’s
circuit board
3. the data is transferred to the software
4. the spectrometer then sits idle, waiting for the next trigger
In the Hardware Mode, you set the integration time by positioning jumpers over pins on the spectrometer’s circuit
board. All other acquisition parameters are set in the software. The source for the integration clock is the
spectrometer. This mode is ideal for use with laser and other short-pulse events.
Use the Hardware Mode if you:
" are using a pulsed excitation or light source in your experiment
" are doing LIF (fluorescence with pulsed excitation) or phosphorescence experiments
" are able to jumper the pins on Jumper Block 4 of the spectrometer’s electronic board
" need to synchronize an acquisition with an external event
To Use the Hardware Mode:
1. Supply a line from your triggering device to Pin 3 of the J2 Accessory Connector to provide the positive
voltage +5VDC to the spectrometer. (See figure on page 109 for pin location.) We do not advise using an
outside source to supply the voltage, as it is based on a referenced ground and your reference may be different
from ours. Using Pin 3 to supply voltage ensures that the spectrometer will receive the appropriate voltage for
the trigger event.
2. Supply a line from Pin 4 of the J2 Accessory Connector to your triggering device. (See figure on page 109 for
pin location.)
3. To set the integration time, look at the charts below. After finding the A/D converter you are using, choose
your integration time. You have four choices.
S2000 Miniature Fiber Optic Spectrometer
Appendix F
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External Hardware Trigger
Jumper Block 4 (JP4)
Integration Time with
DAQ700
Integration Time with
ADC500, SAD500
Integration Time with
ADC1000 Pins 1-2 Pins 3-4
44 ms 8.8 ms 4.4 ms open open
133 ms 27.5 ms 13.3 ms open shorted
275 ms 55.0 ms 27.5 ms shorted open
675 ms 137.5 ms 67.5 ms shorted shorted