Oriel 68806 User manual

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LlFlIEL
INSTRUMENTS
250 Long'Beach Boulevard
Stratford, CT 06497-0872
Phone: [phone]
Fax: [phone]
E-MAIL: [email protected]
68806-M
50-200 WATT He, Hg(Xe), and Hg
ARC LAMP POWER SUPPLY
MODEL 68806
Please read these instructions completely before operating this equipment. If there are any questions or problems
regarding the use of this equipment, please contact: ORIEL INSTRUMENTS -or -the representative from whom this
equipment was purchased,
L.O.T. -ORIEL S.A.
9 Avenue De Laponie
Z.A.
De Courtaboeuf
91951 Les Ulis Cedex
France
Phone: [phone]
Fax: [phone]
L.O.T. -ORIEL ITALIA
Viale
Dei Mille, 20
20129 Milano
Italy
Phone: [phone]
Fax: [phone]
06/17/96
D:\68806
L.O.T. -ORIEL GmbH
1m Tiefen See 58
D-64293 Darmstadt
Germany
Phone: [phone]
Fax: [phone]
FAIRLIGHT BV
Member L.O.T. -Oriel Group
Marshallweg 45
3068
IN Rotterdam
Netherlands
Phone: [phone]
Fax: [phone]
L.O.T. -ORIEL Ltd.
1 Mole Business Park
Leatherhead
Surrey KT22 7AU
England
Phone: [phone]
Fax: [phone]
L.O.T. -ORIEL SUISSE
Moulin-du-Choc
1122 Romanel-Sur-Morges
Switzerland
Phone: [phone]
Fax: [phone]
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TABLE OF CONTENTS
I. HAZARDS/SAFETy.......................... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
1.1 POWER SUPPLY ............................................................. 1
1.2 ARC LAMPS AND LAMP HOUSINGS ............................................. 1
II. SPECiFiCATIONS................................................................ 3
III. INTRODUCTION
............................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4
111.1 DESCRIPTION ............................................................... 4
11.2 68806 FEATURES ............................................................ 5
IV. CONTROLS AND CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6
IV.1 FRONT PANEL .............................................................. 6
IV.2 REAR PANEL ................................................................ 7
V.2 IGNITION ......................... ,......................................... 9
VI. CIRCUIT DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 10
VI.1 GENERAL ................................................................. 10
VII. CALIBRATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 11
VI1.1 CALIBRATION ............................................................. 11
VI1.2 TROUBLESHOOTING ....................................................... 12
VI1.3 SPECIFIC DESCRIPTIONS ................................................... 12
VIII. DRAWiNGS
................................................................... 15
WARRANTY AND RETURNS
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I. HAZARDS/SAFETY
1.1 POWER SUPPLY
68806-M
ARC LAMP POWER SUPPLY
Connections to or from any electrical device must never be made while the power supply is switched
on.
The Oriel Model 68806 Power Supply has
an open circuit voltage of >100 volts when the start switch
is pressed, and could be dangerous if care
is not exercised when the power supply is switched on.
Please follow these precautions when operating the power supply:
• Make all input and output connections before turning the power supply on.
• Do not use the power supply without its cover.
Ensure that the output terminals are properly connected to the lamp housing or lamp socket before
turning
on the power supply.
Don't open the power supply or disconnect the output leads while the power supply is on.
• Follow the lamp or lamp house manufacturer's recommendations and precautions when handling and
using lamps.
Never touch the lamp's quartz envelope with uncovered fingers; definitely not when operating the
lamp or immediately after a shutdown. Also, follow this precaution during lamp installation to avoid
damage to the lamp.
Do not start the lamp with the output control set above the current rating for the lamp.
1.2 ARC LAMPS AND LAMP HOUSINGS
Make sure that the leads are properly connected to the arc lamp. INCORRECT CONNECT/ON WILL
DESTROY THE LAMP ELECTRODES, AND POSSIBLY CAUSE AN EXPLOSION.
XENON AND MERCURY XENON ARC LAMPS
Xenon and Mercury Xenon arc lamps only operate with the anode (positive end)
up.
When an ORIEL LAMP HOUSING is used with a Xenon lamp, you should connect the cable from the (+
connection) on the lamp housing to the + (red) connection on the rear of the power supply.
1
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\
MERCURY ARC LAMPS
68806-M
ARC LAMP POWER SUPPLY
Mercury (Hg) lamps only operate with the anode (positive end) down. Unlike Xe and Hg(Xe) arc lamps,
which stabilize quickly to the preset current, Mercury lamps require some time to reach their stable
operating condition. Several minutes
is typical, but the exact time depends on the cooling of the lamp.
• Make sure that the lamp is adequately cooled. A lamp, not properly cooled, will warm
up and may
lead to
an explosion.
Do not over cool the lamp. Over cooling will prevent the lamp from warming up. The lamp will operate
in an unstable manner with a high light ripple, and possibly shortening its useful life.
USE AN APPROPRIATE ORIEL LAMP HOUSING WITH THE ARC LAMPS TO
MAINTAIN PROPER COOLING
'. During warm up, a Mercury lamp has a lower impedance than NORMAL OPERATION. The voltage
during a warm
up is lower than the final voltage and if the lamp is run at the rated power, the current
is higherthan rated current. The 68806 Power Supply controls the current rather than the lamp power.
Increasing the current during lamp warm up will speed
up the process.
Make sure to reduce the current as the lamp warms up or the lamp will run at higher than rated
power. THIS WILL CAUSE SHORTER LAMP LIFE OR EXPLOSION.
The lamp
is a source of constant current. To prevent overpowering of the lamp as it ages,
monitor its current on regular basis.
2
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II. SPECIFICATIONS
AC Mains Input:
DC Power Output:
DC Current Output:
DC Voltage Output:
Pre-ignition
Operating
Light Output Ripple:
Resistive Load
Arc Lamp Load
Pre-Adjust Accuracy:
Power Meter Accuracy:
Line Regulation:
190-235 VAC mains input
95-135 VAC @ 8 amperes
135-270 VAC @ 4 amperes
50 or 60 Hertz, 10 ampere inrush
300 watts maximum
Adjustable from 0.5 -
11 amperes
Current limit at 12 amperes
> 150 volts unloaded
68806-M
ARC LAMP POWER SUPPLY
Load dependent. Total output power should not exceed 240 watts.
< 0.25% R.M.S. 40 Hz to 40 kHz
Dependent on lamp, and operating conditions.
Typically < 0.5% R.M.S.
2%
2%
0.1 % change in output current for a 95-135 VAC mains input or a
3
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III. INTRODUCTION
111.1 DESCRIPTION
68806·M
ARC LAMP POWER SUPPLY
The Oriel model 68806 arc lamp power supply is a highly regulated source of current that maintains
constant light output necessary for proper operation of arc lamps. Constant current operation of these
sources of radiation
is required whenever a radiometric measurement is being made or whenever a highly
stable light output is needed.
The 68806 allows arc lamps to operate
in constant current mode, with the output voltage being dependent
on the lamp's impedance. The power supply will provide a constant current of up to
11 amperes with a
load voltage range of 0 to 100 volts. A power limit, which limits the product of output voltage and current
to 300 watts, protects the unit from output overloads. A constant current power supply regulates current
even into a short circuit. Lamp current
is limited to a maximum of 12 amperes. The reduced inrush
•.. current minimizes electrode erosion when starting the arc lamp. The Oriel model 68806 Arc Lamp Power
Supply includes all of the circuitry to start and power the lamps, and meter the output parameters.
.The following Oriel arc lamps may be operated with the model 68806 Arc Lamp Supply:
MODEL DC DC
NO. DESCRIPTION VOLTAGE (V) CURRENT (A)
6251 75 Watt Xe 14 5.4
6263 75 Watt Xe (Ozone free) 14 5.4
6254 150 Watt Xe UV (Ozone free) 20 7.5
6255 150 Watt Xe (Ozone free) 20 7.5
6356 150 Watt Xe 20 7.5
6282 50 Watt Hg 22 2.3
6281 100 Watt Hg 20 5
6283 200 Watt Hg 47-65 3.1-4.2
6291 200 Watt HgXe 20-25 8-9.5
6292 200 Watt HgXe (Ozone free) 20-25 8-9.5
4
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11.2 68806 FEATURES
Please refer to Figure 1 for the described equipment features.
Controlled source of current to a wide variety of lamps.
Built-in high voltage ignitor to start the arc lamp.
68806-M
ARC LAMP POWER SUPPLY
A preset switch allows for setting the output current to the recommended operating value before
lamp start.
Contains circuitry to allow viewing the output current, the output voltage, and the output power.
An interlock function that prevents the power supply from operating unless it is closed. Typical uses
for the interlock on ORIEL equipment are:
1. Microswitches to prevent access to the lamp area (electrical, optical, and other hazards).
2. Thermal cutoffs to disable the power supply if the lamp housing overheats.
ORIEL lamp housings use this interlock for operator safety and to disable the power supply if the lamp
housing overheats.
Adjustable 0.5 to
11 A current output.
Voltage compliance from 0 to 100
V.
300 Watt power limit for operating all arc lamps that are rated for DC operation in this voltage, current,
and power range.
5
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IV. CONTROLS AND CONNECTIONS
68806-M
ARC LAMP POWER SUPPLY
This section will describe the various controls, the available connections, and their function. Please
become familiar with their uses before operating the power supply with any lamps. This will reduce
the possibility of damaging the power supply or the lamps through improper operation.
IV.1 FRONT PANEL
AMPS
OUTPUT
o
OUTPUT
PRE-ADJUST
Figure 1 68806 Front Panel Layout
METER AND VOLTAGE, WATTS, AND AMPS SWITCH
E
POWER
[ID[
The analog meter, (A in Figure 1), is scaled to display the output voltage, current, and wattage. Keep
in mind that the metermonitors the output voltage of the supply notthe load, and that the outputpower
is always displayed
by the meter. The one exception is when the preadjust switch is pressed and
operating current is displayed. The
select switch, (8 in Figure 1), enables you to momentarily view the
output
voltage or current by pressing it left or right, respectively.
OUTPUT AND CURRENT PREADJUST SWITCH
A ten turn
potentiometer, (C in Figure 1), is used to provide a precise means of output current
adjustment. A shaft lock
is mounted with this knob to lock in a setting if a readjustment from a previous
current setting
is not desired. When the preadjust switch (0, Figure 1) is pressed, the meter will display
the value of the output current that will be delivered
to the lamp after lamp start.
POWER SWITCH
This
is the AC mains power switch (E in Figure 1). In the "ON" position AC power will be switched into the
main circuitry of the power supply, and an integral indicator lamp will glow to indicate that the power
supply is on. The power switch
is also a circuit breaker which will open both of the AC lines to the internal
circuitry
in case of a fault within the unit.
6
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IV.2 REAR PANEL
J306 8301 J301
@
j'
+ Interlock
J307 J304
Figure 2 68806 Rear Panel Layout
AC MAINS INPUT (J304, Figure 2)
68806-M
ARC LAMP POWER SUPPLY
J304 is an IEC style socket which will accept power cords for worldwide use of the power supply. The
AC mains cord is connected here.
LINE VOLTAGE SELECTOR (S301,
Figure 2)
•• 8301 sets the input voltage range for a nominal 115 VAC or 230 VAC. It is factory preset for your area,
but should be checked before using the power supply.
INTERLOCK SOCKET (J301,
Figure 2)
This connection must be made, otherwise the main power supply will not turn on. ORIEL normally ships
a shorting plug which mates to this socket. The shorting plug must be replaced with the connector that
is supplied with the lamp housing in order to take advantage of its protection feature. Lamp housings
available through ORIEL use this connection as a safety arc lamp shut-off
in case the access doors are
opened when the lamp
is operating or in case of an excessive temperature rise within the lamp housing.
If you are not using an ORIEL lamp housing, for personal safety you should consider including
an interlock
circuit
in your equipment.
DC OUTPUT CONNECTIONS (J306 and J307, Figure 2)
These two UHF screw on connectors are the connections for the main DC output to the load. J306 is the
positive, and J307
is the negative. The low voltage side of an external ignitor or a lamp housing with built-
in ignitor is connected to these two outputs. Both are earth ground isolated. Never make any electrical
connections to these sockets with the power supply on.
7
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