Lab.gruppen LM 44 - Manual (Page 10)

4
Installation
Lake LM Series Quick Start and Field Reference Guide Rev 1.2.8
▸ At more than 40 o C (104 o F) the fan is ON
▸ At 55 o C (131 o F) a temperature warning is indicated on the front panel as ‘TEMP WARNING’ and in the
Controller Event Log as ‘Temp warning: DSP area’.
▸ At 70 o C (158 o F) the device has exceeded the maximum normal operating temperature. This fault is
indicated on the front panel as ‘OVERTEMP’ and in the Controller Event Log as ‘Temp fault: DSP area’.
The Processor will NOT mute or shut down when the
temperature reaches or exceeds 70 o C (158 o F), however,
sustained performance at this temperature cannot be
guaranteed.
3.4 Operating Voltage
The label above the IEC connector indicates the AC mains voltage range for which the device is approved.
LM Series devices utilize a universal power supply, and will operate within the range 70-265V~50-60Hz :
25W. If the plug on the IEC cable provided is not appropriate for your country, a locally-sourced IEC cable
with the appropriate molded plug should be used. A locking IEC cable is not necessary in order to power the
device, although is essential if locking functionality it required.
Once a suitable AC power supply is connected, the device can be turned on using the front panel power
button. When the device is turned on, the power button LED changes from red (Standby) to green (Active).
3.5 Grounding
Analog inputs and outputs feature Iso-Float ™ ground isolation, a technology which combines the benefits of
transformer-coupled isolation with the advantages of clean, direct-coupled inputs and outputs.
The audio converters are galvanically isolated, and not connected to the main ground. High-speed transform-
ers and opto-isolators create a barrier between the device and the outside electrical environment.
The Iso-Float feature is activated by default, but
may be disabled via the Lake Controller software,
or via the front panel menu.
Use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to
section 7.1.5 of the LM Series Operation Manual for further information.
NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).