Programable DC Electronic Load User Manual
14
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2.2 Requirements of Power Supply
UTL8500X series can only be used in following conditions:
Parameters Requirements
Voltage AC 220/110 (±10%)V
Frequency 50/60Hz
Power 50W
Fuse
AC220V input voltage: 250V/0.25A
AC110V input voltage: 250V/0.5A
Three-core power cord is provided. Please make sure that the ground wire of
three-phase socket is properly grounded before use.
The instrument comes with 220V/110V power transfer switch. Before connecting to
the power supply, please check and ensure that the switch is in correct position.
250V/0.25A (5x20mm) fuse is selected and installed for the instrument (220V) with a
spare fuse in the fuse case.
In addition, 2 spare fuses of 250V/0.5A are provided for input voltage of AC 110V.
When replacing the fuse, please remove the external power cord first, then open the
fuse slot under the power interface, take out the old fuse and replace it with a new
one, and install the fuse slot back after completion.
Warning: please do not use the damaged power cord to avoid danger. Use the
250V/0.5A fuse when 110V AC power is input.
2.3 Operating Environment
UTL8500X series can only be used in common-temperature and low-condensing zone.
The general environment requirements are listed as follows. During the on-load process,
the speed of the cooling fan will adjust based on the change of the cooling fin’s
temperature.
Environment Requirements
Operating temperature 0°C~40°C
Operating humidity 20%~80% (Non-condensing)
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