SeaArc2 (HMI®/MSR) Underwater Ballast
- HIGH EFFICIENCY HMI/MSR ARC LAMPS
- DAYLIGHT COLOR TEMPERATURE 5600° K
- COLOR RENDERING INDEX GREATER THAN 90
- SUITABLE FOR COLOR OR B/W VIDEO IMAGING
- 200 AND 400 WATT MODELS
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SeaArc2 (HMI®/MSR) Underwater Ballast |
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HMI/MSR lamps are AC-operated discharge lamps in which the luminous arc burns in a dense vapor atmosphere comprising mercury and the halides of rare earths. The MSR in the part number indicates Medium Source Rare earth (MSR) elements, the number indicates the wattage, and the HR designates Hot Restrike.
HMI lamps have a color temperature of 5600°K. Advantages of HMI/MSR lamps over HID lamps is they warm up in 1-2 minutes and have an instant restrike ability. HMI lamps can also be dimmed when operated from a ballast with dimming circuitry.
A properly designed ballast is required to operate a SeaArc2. SeaArc2 HMI/MSR ballasts can be powered from either AC or DC voltage. The ballast provides properly conditioned AC voltage/current required by the ignitor circuit and lamp in the lighthead.
The HMI ballast can even power DeepSea's proprietary TI/EB (Thallium Iodide/Electronic Ballast) lamp, a specially configured Thallium Iodide (TI) lamp. TI lamps produce an intense, monochromatic green light output (535 nm) which is close to the transmission "window" of seawater. The TI lamp offers maximum light penetration for long range monochromatic imaging applications such as submersible navigation and subsea surveying. TI lamps typically operate from HID magnetic ballasts. However, using a special ignitor, this lamp gives users the flexibility to use one type of ballast to power an HMI or a TI lamp. You can freely swap lightheads with no modification to the ballast. DeepSea offers a dual ballast housing, so that users can operate a TI/EB and HMI from the same housing.
There are options available in the types of reflectors, depth rating, types of material, and types of ballasts. Specification for the 6000 meter 400 Watt Lighthead are on the reverse side as a sample of what is available. Please call for assistance in determining the best combination of options to meet your requirements.
MECHANICAL Material: Lighthead Body: Titanium 6AL-4V Dome Retaining Cowl: Black Acetal (Delrin) Glass Dome: Borosilicate Length: 27.43 cm (10.8 in.) Diameter: 13.46 cm (5.3 in.) Air Weight: 3.67 kg (8.1 lbs.) Water Weight (approx.): 1.8 kg (4.0 lbs.) Reflector: Spot, medium, or wide ENVIRONMENTAL Depth Rating: 6,000 meters (19,680 ft.) Temperature: -5 to +40 deg. C ELECTRICAL InputConnector: LPBH-3-MP InputVoltage: From ballast; 400W 300 Hz Sq. Wave InputPower: 400 watts Ballast Input Voltage Range: 110V-190V AC or DC, 190V-275V AC, 190V-300V DC Lamp Wattage: 400 watts Lamp Average Life Time: 650 hours Recommended Lamp Replacement: 750 hours Note: Average Life Time is related to a burning cycle of 3.5 hours on and 0.5 hours off. Because the risk of arc tube rupture increases with the increasing life time of the lamp, it is advised not to use the lamp longer than the recommended replacement time. ® HMI is a registered trademark of Osram
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Specifications subject to change without notice.
Rev. 01/06/00 |
