Setting The Ac Line Voltage And Installing Fuses; Setting The Ac Line Voltage; Installing The Ac Input Fuse; Fuse Replacement Information - THORLABS MCLS Series Operating Manual

IMPORTANT! Please Read Before You Begin....

Setting the AC Line Voltage and Installing Fuses

Your MCLS unit has been shipped from Thorlabs, Inc. configured for 115VAC operation. If you are planning to operate
your unit using a 230VAC input, or need to replace an open fuse, you must perform all or part of the following procedure:

Setting the AC Line Voltage

- If it is attached, remove the AC line cord from the AC Input connector on the rear panel of the unit.
Using a small screwdriver or similar tool move the LINE SWITCH actuator, on the rear panel, to either the "115V"
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setting or the "230V" setting, whichever corresponds to your local commercial electrical service. The 115V
position allows operation from approximately 103VAC to 127VAC, while the 230V position allows operation from
approximately 207V to 253V.

Installing the AC Input Fuse

Remove the existing fuse from the unit by turning the fuse holder counter-clockwise and pulling out the holder
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cap, which will contain the existing fuse.
- Remove the existing fuse from the fuse holder cap and insert the replacement fuse into the fuse holder cap. One
fuse rated for 230V operation is included with each new MCLS. See Fuse Replacement Information below for
further information.
Replace the fuse holder cap and fuse into the fuse holder socket. Press the cap into the socket and turn the cap
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clockwise.

Fuse replacement information

- For 115V operation use only 5 x 20 mm 250mA 250V Type "T" fuse
For 230V operation use only 5 x 20 mm 125mA 250V Type "T" fuse
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NOTE: Unit is supplied with a 115V parallel blade line cord for North American use only. For all other applications use an
IEC 320 compatible line cord fitted with a plug appropriate for your particular AC wall socket.
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