THORLABS ERM100, Operation Manual, Page: 40 / 59

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ERM100
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Check the mains cable.
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ERM100 turned on?
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Turn on your ERM100 with the mains-switch.
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Check the fuses at the rear panel.
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If blown replace the fuses by the correct type, please refer to section Replacing
Mains Fuses .
Display shows ‘INPUT ERROR: Input power low’
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Is a fiber connected to the optical input of the ERM100?
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Connect the fiber to the optical input of the ERM100.
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Check if the optical connection from the light source to the optical input of the
ERM100.
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Is the light source (laser diode, SLED, ASE) switched on?
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Check Switch the light source on.
Display shows ‘System ERROR: Motor speed low’
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The motor speed is low for more than 10 seconds.
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The motor is defective. Please contact Thorlabs.
If you don’t find the error source by means of the trouble shooting list please first contact
Thorlabs prior to return the ERM100 for checkup and repair.
5.4 Replacing Mains Fuses
The ERM100 optical power meter operates at a line voltage range of 90 V … 264 V.
The two power input fuses are externally accessible. If they have opened due to line distortions
or other causes, they can be replaced from the rear without opening the unit.
1. Turn off the ERM100 and disconnect the mains cable.