OPS-A Series Arc Lamp Power Supplies
OPS-A Series Arc Lamp Power Supplies
The OPS-A® model power supplies by Oriel® Instruments are designed to meet the precise requirements for proper operation of Oriel DC Arc Lamps. These power supplies are capable of operating in constant power, constant current, and intensity modes while producing the high stability light output commonly required for radiometric measurement, when used with the appropriate Oriel lamp, lamp housing, and socket adapter. All OPS Power Supplies are RoHS and CE compliant.
- High stability power supply for 50 - 500 W DC arc lamps
- Large LCD display for easy setup and monitoring
- Capable of operating lamps in current, power, and intensity control modes
- Integrated shutter control and timer feature
- RS232 and USB interfaces located on rear panel for remote lamp operation and monitoring
- Safety interlocks See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | OPS-A1000 OPS-A Arc Lamp Power SuppliesArc Lamp Power Supply, 450-1000 W, Power, Current, Intensity, RS232, USB | Discontinued | ||||
| OPS-A150 OPS-A Arc Lamp Power SuppliesArc Lamp Power Supply, 50-150 W, Power, Current, Intensity, RS-232/USB | |||||
| OPS-A500 OPS-A Arc Lamp Power SuppliesArc Lamp Power Supply, 200-500 W, Power, Current, Intensity, RS-232/USB | Discontinued | ||||
Features
User Interface with Large LCD Display
OPS Power Supply Demonstration Video
This video presents an overview of the OPS-A Series Power Supply's features and capabilities.
Constant Current, Power, and Intensity Control Modes
The OPS Series power supplies allow the lamp to be operated in power, current, and intensity control modes. There is very little difference in the short term output stability when operating an arc lamp in constant current or constant power mode. However, the differences appear as the lamp ages. Even with a stable power supply, deposits on the inside of the lamp envelope are visible as the lamp electrodes degrade, changing the electrical characteristics of the lamp. The distance between the cathode and anode of the arc lamp increases, raising the lamp’s operating voltage.
- In Power Mode, the lamp is operated at a constant power setting. As the voltage cannot be changed, the current is raised or lowered to maintain the power at the same level. As the lamp ages, the radiant output decreases. However, the lamp life is prolonged.
- In Current Mode, the lamp is operated at a constant current setting. As the voltage cannot be changed, the power is raised or lowered to maintain the current at the same level. As the lamp ages, the power is increased. This results in greater optical output which to some extent may help compensate for a darkening lamp envelope. However, the lamp life is reduced due to the increase in power.
- Intensity Mode requires the use of the LIK-LMP light intensity controller kit, also made by Oriel Instruments. When operating in the lamp in Intensity Mode, the user can adjust the Flux Set parameter until the desired output intensity of the lamp is attained. When the desired Flux Set has been established, the user can adjust the Flux Calibration Factor (Flux Cal) setting to change the Lamp Intensity. A calibrated photodetector is often used to establish a Flux Set, but the LIK-LMP can be substituted and the Flux Cal adjusted to output the response of the calibrated detector during operation. This saves the user both the cost and inconvenience of returning a photodetector to a metrology lab for re-calibration, that would otherwise be required had the calibrated sensor been used during lamp operation.
Additional Light Stability with LIK-LMP Light Intensity Controller Kit (sold separately)
Although Oriel power supplies are highly regulated, there are factors beyond the control of the power supply that may affect light output. Some of these are lamp aging, ambient temperature fluctuations, and electrode erosion. For applications where high stability light output is especially critical, the LIK-LMP Light Intensity Controller Kit is suggested in order to compensate for such factors. It works in conjunction with the OPS Series power supplies to maintain a stable, long term output. The LIK-LMP utilizes a TE cooled silicon detector as its light sensing head. When used with the OPS-A Series Arc Lamp Power Supplies this detector monitors light output from the arc lamp source. Constant feedback of the light output allows the OPS Series Power Supply to determine how much voltage/current should be supplied to the light source in order to keep its output intensity constant as the light source ages. Using the cables supplied with the LIK-LMP for interface with the OPS Series Power Supply, the temperature of the Si detector is monitored and the current supplied to the TE cooler is controlled as well. This stabilizes the temperature of the Si detector, creating consistent detector feedback independent of ambient temperature variations. The OPS-A Series Arc Lamp Power Supplies are capable of controlling the temperature of the Si detector over a range of 0-25 °C
Integrated Shutter Control and Timer Features
The shutter control feature of the OPS model power supply is useable in power, current, and intensity control modes. Any shutter which responds by opening or closing when receiving a TTL signal can be controlled by the OPS Power Supplies. This includes low-cost TTL shutter characteristic of Oriel model 71445 and the shutters designed into the Oriel Solar Simulators. A BNC connector is located on the rear panel of the power supply to output these TTL signals to the electronic shutter. The shutter can be manually opened or closed by pressing the SHUTTER button on the front panel of the power supply. RS-232 or USB control of the shutter is possible as well. Utilizing the OPS Power Supply's shutter control feature enables Timed exposure control mode. The exposure or open time of the shutter and number of repeat cycles is set by the user. Exposure times can be paused and resumed at will or reset to 0 in the middle of an exposure with the easy to use push buttons on the front panel.
Configuration Settings
Safety Interlock Prevents Accidental Exposure
Power Supply Replacement Guide
Operates Lamps with High Light Stability
When selecting components to assemble a complete illumination system, the OPS-A Series Power Supply is a vital component for operating a DC arc lamp with minimum light ripple. The OPS-A500 operates Oriel DC Arc Lamps with <1% rms light ripple. Oriel Instruments offers all the necessary components required to assemble such a highly stable DC arc lamp system.
Resources
Software
Oriel API Examples & Instructions(3.4 MB, ZIP)
