Oceanoptics SR Series Standard Resolution Spectrometers
Specifications
- Product Name: Ocean SR Series Multipurpose Spectrometers
- Manufacturer: Ocean Optics, Inc.
- Model Number: MNL-1029 Rev B
- Locations: Americas, Europe, Middle East & Africa, Asia
Product Usage Instructions
- Installation and Setup
- Before starting to use the Ocean SR Series Spectrometers, follow the steps below for proper installation:
- Software Installation: Install the required software for the spectrometers.
- Configuring the Ocean SR Spectrometers: Set up the spectrometers according to the provided guidelines.
- Hardware Setup: Connect the hardware components of the spectrometers properly.
- Troubleshooting
- If you encounter any issues with the Ocean SR Spectrometers, follow the troubleshooting steps provided in the manual. Common issues include problems with computer connection and application installation.
- Calibration
- Regular calibration is essential for accurate readings. Follow the steps outlined in the manual for wavelength and irradiance calibrations.
FAQs
- Q: What should I do before using the Ocean SR Series Spectrometers?
- A: Before use, make sure to read the manual thoroughly and keep contaminants away from the bench. Always keep the protective cap on the slit aperture when not in use to prevent contamination.
- Q: How can I get support for the Ocean SR Series Spectrometers?
- A: For support related to the Ocean SR Series Spectrometers, you can contact Ocean Optics via email at support@oceanoptics.com or by phone at the provided contact numbers based on your region.
“`
OCEAN SR SERIES
Multipurpose Spectrometers
Installation and Operation Manual
MNL-1029 Rev B
Locations
Americas
Manufacturing & Logistics 3500 Quadrangle Blvd., Orlando, FL 32817, USA
Sales: info@oceanoptics.com Orders: orders@oceanoptics.com Support: support@oceanoptics.com
Phone: +1 727-733-2447 Fax: +1 727-733-3962
Ocean Applied 176 Anderson Ave, Ste. F304, Rochester, NY 14617
International Light 10 Technology Drive, Peabody, MA 01960
Europe, Middle East & Africa
Rochester, NY, USA
Peabody, MA, USA
Orlando, FL, USA
Oxford, UK
Sales & Support Geograaf 24, 6921 EW Duiven, The Netherlands
The Wheelhouse, 81 St. Clement’s Street Oxford OX4 1AW GBR
Logistics Maybachstrasse 11,73760 Ostfildern, Germany
Email: emeasales@oceanoptics.com
Netherlands: +31 26-319-0500 Netherlands Fax: + 26-319-0505 Germany: +49 711-341696-0 UK: +44 1865-819-922 France: +33 442-386-588
Duiven, NL
Stuttgart (Ostfildern), DE
Shanghai, PRC
Asia
Ocean Optics China 666 Gubei Rd., Kirin Tower Suite 601B Changing District, Shanghai, PRC, 200336
Email: asiasales@oceanoptics.com
China: +86 21-6295-6600 China Fax: +86 21-6295-6708 Japan & Korea: +82 10-8514-3797 Ocean Optics India Prestige Shantiniketan, Gate no. 2 Tower C, 7th Floor Whitefield main road, Mahadevpura Bengaluru-560048 Karnataka, India
Phone: +91 80-67475336
www.oceanoptics.com
Ocean Optics is a brand of Ocean Insight, Inc. For more information visit www.oceaninsight.com.
Table of Contents
Before You Get Started
Warnings & Cautions Warranty Certifications and Compliance
Introduction
Product Description Features Items Included with Shipment
Installation and Setup
Software Installation Configuring the Ocean SR Spectrometers Hardware Setup Hardware Features
ii Troubleshooting
8
ii
Ocean SR Spectrometers Connected to Computer Prior to Application Installation
8
iii
Frequently Asked Questions
9
iii
Repairs
10
1
Servicing
10
1 Technical Specifications
11
1
Timing Signals
13
1
Trigger Timing
14
2
Mechanical Dimensions
29
2 Calibration
30
3
Wavelength Calibration
30
3
Irradiance Calibrations
30
4
Copyright © 2023 Ocean Optics, part of Ocean Insight All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from Ocean Optics.
This manual is sold as part of an order and subject to the condition that it shall not, by way of trade or otherwise, be lent, re-sold, hired out or otherwise circulated without the prior consent of Ocean Optics, Inc. in any form of binding or cover other than that in which it is published.
Trademarks All products and services herein are the trademarks, service marks, registered trademarks or registered service marks of their respective owners.
Limit of Liability Every effort has been made to make this manual as complete and as accurate as possible, but no warranty or fitness is implied. The information provided is on an “as is” basis. Ocean Optics shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this document.
Ocean SR Series
i
Before You Get Started
Warnings & Cautions
Caution: Read this manual thoroughly before using and operating this equipment.
Caution: Do not let contaminants get into the bench. Keep the protective cap on the slit aperture when not connected to an accessory, probe or fiber.
Caution: Only change the slit aperture in a clean environment where contaminants including dust cannot enter the bench during the procedure.
Caution: Substitution of a component or accessory different from that supplied may result in measurement error, equipment damage, increased radio-frequency emissions or decreased immunity from electrical disturbances.
Caution: Repairs should be undertaken only by personnel trained or authorized by Ocean Optics. The device does not contain any user serviceable parts.
Caution: Do not immerse the device in any fluid, place fluids on top of or attempt to clean with liquid detergents or cleaning agents. This may cause an electrical hazard. Use a clean linen cloth to wipe the equipment. Do not use if accidental wetting occurs.
Caution: Do not remove any covers. Doing so may increase the risk of electrical shock or compromise the integrity of the optical components.
Caution: Do not gas sterilize or autoclave this device.
Caution: Consult local codes and ordinances for proper disposal of equipment and other consumable goods.
Caution: The device and/or accessories may not operate correctly if used or stored outside the relevant temperature and humidity ranges described in the Technical Specifications.
Caution: Do not use if device is dropped and/or damaged. Have an authorized service representative check the device before using again.
Caution: Be sure to install any software BEFORE connecting the spectrometer to your PC or host system. The software installs the drivers required for spectrometer installation. If you do not install the software first, the system may not properly recognize the spectrometer.
Caution: The user of this spectrometer shall have the sole responsibility for any malfunction that results from improper use, faulty maintenance, improper repair, damage or alteration by anyone other than Ocean Optics or their authorized service personnel.
Ocean SR Series
ii
Warranty
For the most current warranty information, please visit www.oceanoptics.com.
Certifications and Compliance
Warning
This is an FCC Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures.
Warning
The authority to operate this equipment is conditioned by the requirement that no modifications will be made to the equipment unless the changes or modifications are expressly approved by the manufacturer.
FCC Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which the user will be required to correct the interference at his own expense.
WEEE compliance
The WEEE symbol on the product indicates that the product must not be disposed of with normal household waste. Instead, such marked waste equipment must be disposed of by arranging to return to a designated collection point for the recycling of waste electrical and electronic equipment. Separating and recycling this waste equipment at the time of disposal will help to conserve natural resources and ensure that the equipment is recycled in a manner that protects human health and the environment.
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iii
Warning
This device has been tested and complies with the following standards: Electromagnetic Compatibility Directive 2014/30/EU EN 61326-1:2013 EN 55011:2009 w/A1:2010
RoHS Compliant
This device complies with RoHS materials standards.
ISO Certification
Ocean Optics, the applied spectral knowledge company, has been certified for ISO 9001:2015 certification applicable to the design and manufacture of electro-optical equipment.
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iv
Introduction
Product Description
Ocean SR spectrometers are built using industry leading manufacturing techniques that help deliver high thermal stability and low unit-to-unit variation without compromising the flexibility and configurability that are the hallmark of the design. Features such as interchangeable slits, indicator LEDs and simple device connectors deliver more freedom and flexibility.
Features
· Plug-and-play capability via the USB-C connection. · User-interchangeable slit. · LEDs show data transfer status. · Compact and lightweight. · 4 GPIO pins · OceanDirect SDK is included.
Items Included with Shipment
· Ocean SR Spectrometer · USB-C Cable · Wavelength Calibration Data Sheet · Linearity Calibration Data Sheet (please save Calibration
sheets for future reference)
Ocean SR Series
1
Installation and Setup
NOTE
Be sure to install the spectroscopy application BEFORE connecting the spectrometer to your PC. The software installs the drivers required for spectrometer installation. If you do not install the software first, the system will not properly recognize the spectrometer. If you have already installed the OCEAN SR to a computer running on a Windows platform prior to installing the operating software, consult the Troubleshooting section for information on correcting a corrupt OCEAN SR installation.
Software Installation
Use OceanView version 2.0.12 and above for Ocean SR spectrometers. You can use OceanView on the following operating systems:
NOTE
Be sure that you download the correct software package for your computer version (32- or 64-bit). See the Frequently Asked Questions in Troubleshooting for more information on determining your computer version.
Windows
Mac
8
8.1
10
OS X Version 10.5 or later on Intel processor
*Software may run with previous operating systems but Ocean Optics does not actively support these installations.
Consult the OceanView manual for computer hardware requirements.
Ocean SR Series
2
Configuring SR Spectrometers
Ocean SR spectrometers can be used with OceanView software when connected to the USB port. If you have followed the previous steps and started your spectroscopy application, the spectrometer is already acquiring data. Even with no light in the spectrometer, there should be a dynamic trace displayed in the bottom of the graph. If you allow light into the spectrometer, the graph trace should rise with increasing light intensity. This means the software and hardware are correctly installed.
Hardware Setup
Each Ocean SR spectrometer connects to a computer via the USB port. When connected through a USB 2.0 or 1.1 port, the spectrometer draws power from the host computer, eliminating the need for an external power supply
Follow the steps below to connect the OCEAN SR spectrometer to a computer via the USB port:
1. Install the spectrometer operating software on the destination computer.
2. Locate the USB cable (USB-Cable) provided with the Ocean SR spectrometer.
3. Insert the micro connector end of the cable into the Ocean SR spectrometer and the larger end of the cable into the USB port of the computer.
4. Connect any spectroscopy accessories. To find operating instructions for Ocean SR-compatible products (such as light sources, sampling chambers, and probes), consult the Ocean Optics website at OceanOptics.com.
5. Attach the fiber to the fiber optic connector on the spectrometer.
If you installed the spectrometer operating software prior to connecting your Ocean SR spectrometer, the software automatically installs the correct drivers. If the drivers do not successfully install (or if you connected the Ocean SR to the computer before installing the software), consult Troubleshooting.
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3
Hardware Features
Ocean SRs Status Indicator LEDs
Ocean SRs have two indicator lights that operate as shown:
LED Red
Green
Steady Unit is on
N/A
Flashing N/A
Unit is transmitting data
NOTE
LEDs can be turned off in OceanView or by using a software API command in OmniDriver or OceanDirect.
Green
Red
LED
LED
Ocean SR Series
4
16 Pin IO Connector
This port allows Ocean SR spectrometers to be connected to Ocean Optics light sources and other external equipment.
Pin 1
Ocean SR Series
5
PIN
Function
Description
1
RS-232 TX
Spectrometer transmit to host
2
RS-232 RX
Spectrometer receive from host
3
GND
Ground
4
RSTn
External reset input
5
LampEnable
Output
6
ExtTrigIn
External trigger input
7
SingleStrobe
Single strobe output
8
ContStrobe Continuous strobe output
Pins 4-12 on the auxiliary connector are 3.3V CMOS-compatible inputs or outputs, with +/- 1mA drive capability.
Ocean SR Series
PIN
Function
Description
9
GPIO.0
General purpose I/O
10
GPIO.1
General purpose I/O
11
GPIO.2
General purpose I/O
12
GPIO.3
General purpose I/O
13
Reserved
14
Reserved
15
+5VDC
External power supply input
16
GND
Ground
6
External Reset Input Pin
Each Ocean SR spectrometer can reset itself via an external reset pin. Applying a logic low input to the RSTn pin places the Ocean SR into a hardware reset condition and will remain in reset until the input is brought high again. Note that this is a full hardware reset; all operating parameters are also reset to defaults that can be restored by re-initializing via software commands.
16 Pin Connector Cable (CBL-ISDF-DB15)
This cable connects to the following external light sources:
DH-3P DH-2000 (US) HPX series (US) HL-2000-FSHA HL-3P
16 Pin Connector Cable (CBL-ISDF-PX-DB15)
PX – 2
RS-232 Interface
The spectrometer supports an optional RS-232 interface for communication as an alternative to USB. Refer to the Serial Communications Protocol Technical Note available on our website for details on how to connect to and use the RS-232 interface.
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7
Troubleshooting
Sometimes things do not go according to plan. When issues arise, do not hesitate to contact us and our Tech Support team will leap into action. Some typical questions are answered here. For more information, consult the FAQs on the Ocean Optics website.
Ocean SRs Connected to Computer Prior to Application Installation
Windows Operating Systems
If you connected your Ocean SR device to the computer prior to installing your spectroscopy application (OceanView) on a Windows platform, you may encounter installation issues that you must correct before your Ocean Optics device will operate properly.
Follow the applicable steps below to remove the incorrectly installed device, device driver, and installation files.
NOTE
If these procedures do not correct your device driver problem, you must obtain the Correcting Device Driver Issues document from the Ocean Optics website: www.oceanoptics.com.
Remove the Unknown Device from Windows Device Manager
1. Open Windows Device Manager. Consult the Windows operating instructions for your computer for directions, if needed.
2. Locate the Other Devices option and expand the Other Devices selection by clicking on the “+” sign to the immediate left.
3. Locate the unknown device (marked with a large question mark). Rightclick on the Unknown Device listing and select the Uninstall or Remove option.
4. Click the OK button to continue. A warning box appears confirming the removal of the Unknown Device. Click the OK button to confirm the device removal.
5. Disconnect the Ocean SR from your computer. 6. Replug the spectrometer into your computer.
The system should now be able to locate and install the correct drivers for the USB device.
NOTE
Improperly installed USB devices can also appear under the Universal Serial Bus Controller option. Be sure to check this location if you cannot locate the unknown device.
Ocean SR Series
8
Apple Mac OSX Operating Systems
Since there are no device files for Ocean SR spectrometers in a Mac operating system, you should not encounter any problems if you installed the spectrometer before the operating software.
Frequently Asked Questions
I connected the USB cable and started OceanView but I don’t see my spectrometer attached.
Use the “Action -> Scan for hardware changes” selection in the Device Manager to rescan for attached devices.
I am having trouble installing the drivers, what should I do?
Hardware device driver installation is usually seamless on Microsoft Windows operating systems and should happen in the background when you connect your spectrometer to a computer with the software installed. However, some Windows systems require a bit more care when connecting your spectrometer for the first time.
If your spectrometer is not recognized by OceanView on your computer, you need to manually install the spectrometer drivers. See your OceanView manual for this procedure. Also consult the Correcting Device Driver Issues document on www.oceanoptics.com.
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9
How do I know my spectrometer has power?
The red LED on the spectrometer should be constantly on if the unit is receiving power.
How do I know my spectrometer is transmitting data?
The green LED on the spectrometer flashes when transmitting data.
I connected the Ocean SR to the computer before installing my spectroscopy operating software to install the drivers. What do I do now?
As detailed below, the steps to take to resolve this issue differ, depending on your computer’s operating system.
How do I check the configuration of my spectrometer?
Check the label on the bottom of your spectrometer. You can also check your configuration using OceanView by opening the Schematic window and double-clicking the spectrometer icon.
Repairs
Sometimes accidents happen! If you need to return your Ocean Optics product for repair, here is what to do:
1. Contact us to evaluate and diagnose the problem. If it is determined that the product must be returned, the representative will issue an RMA number.
2. Package your product, ideally in the original packaging, and return it to Ocean Optics, along with the RMA number that you received.
Upon careful examination, we’ll advise you with an estimate. When your product is ready, it will be returned to you.
NOTE
For RMA returns under warranty we will organize and pay for shipping both ways. For accidental damage, you pay only to have the product shipped to your closest Ocean Optics or distributor office.
Ocean SR Series
Servicing
To keep your instrument in tip-top shape we recommend yearly wavelength recalibration. You can do this yourself if you have appropriate tools or we can do this for you. Contact your local representative to find out more about service availability and cost. We offer the following services: · Wavelength Calibration · Absolute Irradiance Calibrations
10
Technical Specifications
Test conditions for the following data: 25o C
Specification
SR2
SR4
SR6
Integration Time Dynamic Range for single
acquisition1 Signal-to-Noise (maximum SNR per 1 second w/High
Speed Averaging Mode) Signal to Noise
(Single scan @ 10 ms)
Resolution (FWHM)
Scan rate (type) ² Thermal Wavelength Drift
Triggering Wavelength Range
Grating Entrance Slit
Active Pixels Corrected Linearity
Optical and Spectroscopic
1 µs 2 s
3.8 ms-10 s
3400:1
1300:1
7.2 ms-5 s 12000:1
25800:1
3000:1
3500:1
380:1
250:1
400:1
0.43-2.0 nm (configuration-dependent)
630 Hz
0.60-2.03 nm (configuration-dependent)
74 Hz
0.50-2.0 nm (configuration-dependent)
74 Hz
0.02 nm/°C
0.02 nm/°C
0.02 nm/°C
Software, External rising edge, External level
190-1050 nm
220-1050 nm
180-1100 nm
Configurable
5, 10, 25, 50, 100, 200 µm
Detector
2098
3648
2048
99.7%
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Technical Specifications
Specification
SR2
SR4
SR6
Electrical
Power-up Time
3 s
Connectors
USB Type-C, SMA, 16 pin Samtec TFM, RS-232
Power Requirements
5VDC
Mechanical
Input Fiber Connector
SMA 905
Physical Dimensions
88.1 x 63.5 x 31.45 mm
Weight
275 g
Environmental
Temperature (storage):
-30 °C to 70°C
Temperature (operation)
0 °C – 55 °C
Humidity
<85%
Operation
For indoor use
Operating Altitude (maximum)
2000 m
Overvoltage Category
1
Pollution Degree
2
1 Dynamic range for a single acquisition is a measure of the ratio of full signal to noise.
2 Scan rate is dependent on factors external to the spectrometer. This figure was obtained using OmniDriver and OceanDirect APIs.
Ocean SR Series
12
Timing Signals
The spectrometer supplies two strobe output signals to allow the user to synchronize external devices to trigger events and integration time. Each strobe signal can be independently enabled or disabled. The following subsections define the Single Strobe and Continuous Strobe Output signals. The Single and Continuous Strobe signals are accessible on the 16 Pin IO Connector.
Single Strobe Output
Synchronization of external devices to the spectrometer’s Trigger Event can be accomplished with the Single Strobe output. The Single Strobe output is an active-high programmable pulse that occurs at a user-defined time during each acquisition cycle. The Single Strobe output has two user configurable settings, Single Strobe Delay and Single Strobe Width.
The timing of the Single Strobe output signal is referenced from the Trigger Event. The Single Strobe Delay (tSSDLY) defines the time from the Trigger Event until the rising edge of the Single Strobe output. After the Single Strobe Delay has elapsed and the Single Strobe output has gone high, it will remain active for a duration equal to the Single Strobe Width (tSSH). The Single Strobe output will return to a low or inactive state at the end of the Single Strobe Width.
Note that there is a delay from the Trigger Event until the start of integration. So, if the Single Strobe Delay is less than the Integration Delay, then the Single Strobe will assert before the start of integration. Also note that if the Single Strobe output is configured for a longer period than the integration time, it will reset to its inactive state at the end of the integration time.
Refer to the timing diagrams later in this section for more information on the Single Strobe Timing.
Continuous Strobe Output
The Continuous Strobe output signal is a periodic signal with a 50% duty cycle that occurs during the integration time each acquisition cycle. The Continuous Strobe output has a user configurable Continuous Strobe Period (tCSPER). The Continuous Strobe signal is only valid during the integration time (tINTEG).
When operating in Software Trigger or External Edge Trigger modes, the Continuous Strobe signal is only exercised if it can complete a full period within the integration period. For the Continuous Strobe signal to be fully realized for at least one period, the integration time must be greater than the Continuous Strobe Period. If there are multiple Continuous Strobe periods within an integration period, only full periods are generated. This means the time between the last Continuous Strobe period and the end of integration time (tCSOFF) is between 0 and tCSPER.
When operating in External Level Trigger mode, the Continuous Strobe output will return to a low logic level at the end of the integration time. This may truncate any Continuous Strobe period in progress, resulting in a partial period.
Refer to the timing diagrams later in this section for more information on the Continuous Strobe timing.
Ocean SR Series
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Trigger Timing
A Trigger Event is an action that causes the spectrometer to start an acquisition cycle. An acquisition cycle can be broken up into three sections. The first section is a delay, the second is the integration time, and then lastly, a busy time. A Trigger Event can be driven by a command from software or the External Trigger input signal located on the 16 Pin IO Connector.
There are several triggering modes for the spectrometer, and they have specific timing requirements. In addition, the Single Strobe and Continuous Strobe output behavior are directly related to the trigger modes. This section will define and describe the overall function of the trigger modes and strobe signals.
Acquisition Delay
The Acquisition Delay is a user programmable time that delays the start of integration from the Trigger Event. Note that the start of the Continuous Strobe output signal is tied to the beginning of integration, so the Acquisition Delay will also delay the start of the Continuous Strobe output. The Single Strobe is relative to the Trigger Event, so it is not affected by the Acquisition Delay. The Acquisition Delay does not affect the length of integration, it only delays the start of integration relative to the Trigger Event.
Refer to the timing diagrams later in this section for more information on the Acquisition Delay timing.
Trigger Modes
The spectrometer supports three trigger modes, which are set with the Trigger Mode command. Detailed information of each trigger mode follows.
The 3 trigger modes are:
Software Trigger: A trigger is initiated internal to the spectrometer with a command from software. The integration time is set by software configuration.
External Edge Trigger: A trigger is initiated by the rising edge of the External Trigger input signal on the 16 Pin IO Connector. The integration time is set by software configuration.
External Level Trigger: A trigger is initiated by the rising edge of the External Trigger input signal on the 16 Pin IO Connector. The integration time is determined by the pulse width of the External Trigger input.
Software Trigger
The default triggering mode is for a software trigger. A software trigger may be initiated by OceanView, OmniDriver, or OceanDirect software. Once a command is sent to the spectrometer, an internal trigger is generated that begins an acquisition cycle. The moment that the spectrometer recognizes a software trigger is called a Trigger Event. Note that there is some latency between the software on the host computer and the Trigger Event; this latency varies between computer systems.
Ocean SR Series
14
There is a delay between the Trigger Event and the start of integration time. This delay is the sum of the user defined acquisition delay (tACQDLY) and a fixed delay (tBUSY1).
The integration time (tINTEG) is user defined in software. This is the time that the detector is collecting spectra data.
There is another delay (tBUSY2) after the integration time completes until the end of the acquisition cycle. After the acquisition cycle completes, the spectrometer transfers data to the host computer and is then ready for another trigger.
The Single Strobe timing is relative to the Trigger Event. The Single Strobe has a configurable delay defined as tSSDLY. The Single Strobe is a single pulse that goes high at the end of tSSDLY and stays high for a specified time of tSSH. The values for the Single Strobe delay and pulse width are set by the user in software.
The Continuous Strobe signal is a series of pulses with a user specified period that starts with the beginning of the integration time (tINTEG). The pulses have a 50% duty cycle and only full periods are exercised during the integration time. If a subsequent Continuous Strobe period cannot be completed before the end of the integration time, the continuous strobe signal is turned off and set to 0.
The following timing diagram shows an acquisition cycle for a Software Trigger event.
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15
Software Trigger timing characteristics are defined in the tables below.
Ocean SR Series
16
Symbol tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY
tSSH tCSPER tCSOFF tCSOFF
Table 1 SR2 Software Trigger Timing Characteristics
Description
Time
min
typ
max
Acquisition Delay
0 µs
—
335,500 µs
Notes User specified, 1 µs resolution
Initial Busy Integration Time
Final Busy
1 µs 1 µs
—
–218 µs
218 µs 6 s —
1 µs when tINTEG 218 µs (219 µs tINTEG) when tINTEG < 218 µs
User specified, 1 µs resolution
Single Strobe Delay
0 µs
—
Single Strobe Width
0 µs
—
Continuous Strobe Period
0 µs
—
Continuous Strobe Off Time
0 µs
—
Continuous Strobe Off Time
0 µs
—
–tINTEG tCSPER tCSPER
Constant at 218 µs
User specified, 1 µs resolution. Single Strobe returns low at the end of inte-
gration time. User specified, 1 µs resolution. Single Strobe returns low at the end of inte-
gration time. User specified, 1 µs resolution. Should be less than Integration Time
to activate.
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Symbol tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY
tSSH tCSPER tCSOFF
Table 2 SR4 Software Trigger Timing Characteristics
Description
Time
min
typ
max
Acquisition Delay
0 µs
—
335,500 µs
Notes User specified, 1 µs resolution
Initial Busy
—
3706 µs
—
Constant at 3706 µs
Integration Time
3800 µs
—
10 s
User specified, 1 µs resolution
Final Busy Single Strobe Delay Single Strobe Width Continuous Strobe Period Continuous Strobe Off Time
—
3706 µs
0 µs
—
0 µs
—
0 µs
—
0 µs
—
—tINTEG tCSPER
Constant at 3706 µs
User specified, 1 µs resolution. Single Strobe returns low at the
end of integration time. User specified, 1 µs resolution. Single Strobe returns low at the
end of integration time. User specified, 1 µs resolution. Should be less than Integration
Time to activate.
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Symbol
tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER tCSOFF
Description
Acquisition Delay
Initial Busy
Integration Time
Final Busy
Single Strobe Delay
Single Strobe Width Continuous Strobe
Period Continuous Strobe
Off Time
Table 3 SR6 Software Trigger Timing Characteristics
Time
min
typ
max
Notes
0 µs
—
335,500 µs
User specified, 1 µs resolution
—
15 ns
—
Constant at 15 ns
7200 µs
—
5 s
User specified, 1 µs resolution
—
4977 µs
—
Constant at 4977 µs
0 µs
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
0 µs
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
0 µs
—
tINTEG
User specified, 1 µs resolution. Should be less than Integration Time to activate.
0 µs
—
tCSPER
External Edge Trigger
The External Edge Trigger mode for the spectrometer uses a rising edge on the External Trigger input signal from the 16 pin IO connector as the source for a Trigger Event. The External Trigger signal must have a minimum high time of at least 10 ns. There is a short delay (tETRGDLY) between the external signal rising edge and Trigger Event where the acquisition cycle begins.
For the case of an External Edge Trigger, T0 is defined as the moment the external trigger signal goes from low to high. After the External Edge Trigger Delay (tETRGDLY), there is the integration delay (tBUSY1 + tACQDLY), followed by the integration time (tINTEG), then finally the last busy time (tBUSY2).
The Single Strobe signal for the case of an edge trigger event is similar to that of a software trigger. The single strobe delay is relative to the Trigger Event. The Single Strobe Width defines the pulse width of the Single Strobe output signal.
Also, the Continuous Strobe signal function while in External Edge Trigger mode is the same as that of the software trigger. The Continuous Strobe output signal starts with the start of the integration time. Only full periods of the Continuous Strobe are exercised during integration time.
The following timing diagram shows an acquisition cycle for an External Edge Trigger event.
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Figure 2 External Edge Trigger Timing Diagram External Edge Trigger timing characteristics are defined in the tables below.
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Symbol tETPH tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER tCSOFF
Table 4 SR2 External Edge Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Edge Trigger Pulse Width
10 ns
—
—
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy Integration Time
1 µs 1 µs
—
218 µs
1 µs when tINTEG 218 µs (219 µs tINTEG) when tINTEG < 218 µs
—
6 s
User specified, 1 µs resolution
Final Busy
—
Single Strobe Delay
0 µs
Single Strobe Width
0 µs
Continuous Strobe Period
0 µs
Continuous Strobe Off Time
0 µs
218 µs —–
—
Constant at 218 µs
—
tINTEG
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Should be less than Integration Time to activate.
tCSPER
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Symbol tETPH tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER tCSOFF
Table 5 SR4 External Edge Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Edge Trigger Pulse Width
10 ns
—
—
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy
—
3706 µs
—
Constant at 3706 µs
Integration Time
3800 µs
—
10 s
User specified, 1 µs resolution
Final Busy
—
3706 µs
—
Constant at 3706 µs
Single Strobe Delay
0 µs
Single Strobe Width
0 µs
Continuous Strobe Period
0 µs
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
—
tINTEG
User specified, 1 µs resolution. Should be less than Integration Time to activate.
Continuous Strobe Off Time
0 µs
—
tCSPER
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Symbol tETPH tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER tCSOFF
Table 6 SR6 External Edge Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Edge Trigger Pulse Width
10 ns
—
—
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy
—
15 ns
—
Constant at 15 ns
Integration Time
7200 µs
—
5 s
User specified, 1 µs resolution
Final Busy
—
4977 µs
—
Constant at 4977 µs
Single Strobe Delay
0 µs
Single Strobe Width
0 µs
Continuous Strobe Period
0 µs
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
—
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
—
tINTEG
User specified, 1 µs resolution. Should be less than Integration Time.
Continuous Strobe Off Time
0 µs
—
tCSPER
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External Level Trigger
The External Level Trigger mode for the spectrometer waits for a trigger signal in the 16 Pin IO Connector on the External Trigger Input pin. In External Level Trigger mode, rather than using the software configured integration time, the integration time is directly related to the pulse width of the trigger pulse. The rising edge of the External Trigger signal causes a Trigger Event after a short constant time (tETRGDLY). There is a constant delay from the Trigger Event to the start of integration (tBUSY1). The start of Integration Time can be further delayed by configuring the Acquisition Delay (tACQDLY).
Since the trigger pulse width determines the integration time, the trigger signal must remain high for a minimum time. If the External Level Trigger pulse does not meet the minimum pulse width, an error will occur and the received spectral values will be all 0’s.
The Single Strobe signal functions the same as the other trigger modes.
However, the Continuous Strobe signal is slightly different. The Continuous Strobe is active during the integration time, but the Continuous Strobe signal will be forced low at the end of the integration time. This means the final period of the Continuous Strobe signal is not guaranteed to be a full period.
The following timing diagram shows an acquisition cycle for an External Level trigger event.
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External Level Trigger timing characteristics are defined in the tables below.
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Symbol tTLPUL tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER
Table 7 SR2 External Level Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Level Trigger Pulse Width
220 µs
—
6 s
Integration time is equal to tTLPUL
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy
—
1 µs
—
Constant at 1 µs
Integration Time Final Busy
Single Strobe Delay Single Strobe Width Continuous Strobe Period
220 µs —
0 µs 0 µs 0 µs
-218 µs
—-
6 s —tINTEG
Integration time is equal to tLPUL.
Constant at 218 µs
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Continuous Strobe negates at end of integration time.
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Symbol tTLPUL tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER
Table 8 SR4 External Level Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Level Trigger Pulse Width
3800 µs
—
10 s
Integration time is equal to tTLPUL
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy
—
3706 µs
—
Constant at 3706 µs
Integration Time
3800 µs
—
Final Busy
—
3706 µs
Single Strobe Delay
0 µs
—
Single Strobe Width
0 µs
—
Continuous Strobe Period
0 µs
—
10 s —-
tINTEG
Integration time is equal to tLPUL.
Constant at 3706 µs
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
User specified, 1 µs resolution. Continuous Strobe negates at end of integration time.
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Symbol tTLPUL tETRGDLY tACQDLY tBUSY1 tINTEG tBUSY2 tSSDLY tSSH tCSPER
Table 9 SR6 External Level Trigger Timing Characteristics
Description
Time
min
typ
max
Notes
External Level Trigger Pulse Width
7200 µs
—
5 s
Integration time is equal to tTLPUL
External Edge Trigger Delay
20 ns
—
30 ns
Time from External Trigger rising edge to Trigger Event
Acquisition Delay
0 µs
—
335,500 µs
User specified, 1 µs resolution
Initial Busy
—
6 µs
—
Constant at 6 µs
Integration Time
7200 µs
—
Final Busy
—
4977 µs
Single Strobe Delay
0 µs
—
Single Strobe Width
0 µs
—
Continuous Strobe Period
0 µs
—
5 s
Integration time is equal to tLPUL.
—
Constant at 4977 µs
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
—
User specified, 1 µs resolution. Single Strobe returns low at the end of integration time.
t
User specified, 1 µs resolution. Continuous Strobe negates at end of integration time.
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Mechanical Dimensions
Mounting: Recommend use of two #4-40 holes located on the Samtec/Fiber input side for a mounted configuration.
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Calibration
Each Ocean SR spectrometer contains wavelength calibration coefficients, linearity coefficients, and a serial number unique to each spectrometer. The spectroscopy application reads these values directly from the spectrometer, enabling the ability to “hot-swap” spectrometers between computers without entering the spectrometer coefficients manually on each computer.
Wavelength Calibration
Each spectrometer is calibrated before it leaves Ocean Optics, however the wavelength for all spectrometers will drift slightly as a function of time and environmental conditions.
For instructions on how to calibrate an OCEAN SR spectrometer, visit www.oceanoptics.com.
Irradiance Calibrations
Irradiance calibrations and relative irradiance calibrations are about quantifying the spectra, by translating the signal (incident number of photons) to a calibration. This can be either absolute (an atomic emission light source of known output power) or relative (corrected for instrument response function but not absolute units). It can be considered a measurement technique and is used widely in remote sensing, light metrology and anywhere where you wish to characterize the incident light source. Irradiance calibrations are not required for many techniques because these measure the relative signal changes with respect to the sample and not the light source.
You can find out more about irradiance calibration techniques at www.oceanoptics.com.
OceanView has wizards that will step you through absolute and relative irradiance calibrations. More information on these is located in the OceanView.
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Questions?
Chat with us at www.oceanoptics.com. info@oceanoptics.com
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Documents / Resources
 |
Oceanoptics SR Series Standard Resolution Spectrometers [pdf] Instruction Manual SR Series Standard Resolution Spectrometers, SR Series, Standard Resolution Spectrometers, Resolution Spectrometers |