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PM5020 Dual-Channel Benchtop Power and Energy Meter Chapter 4 Operating Instructions
Rev: 1.0, 18-Aug-2022 © 2022 Thorlabs
Shutter Settings
A shutter control icon automatically appears in the side menus of any measurement screen when
a SH05R(/M) or SH1(/M) Thorlabs optical beam shutter is connected to the Hirose HR10A-7R-6S connector.
Operating the shutter requires an interlock to be connected to the 2.5 mm mono audio interlock con-
nector in the rear panel. The position state of the shutter is monitored and displayed on the touch screen.
The settings menu provides the following interface:
The shutter, in addition to manual control in the GUI, can be monitored and controlled by the Digital I/O2
or the front AUX I/O BNC connector using a TTL signal.
4.10 Fan Control
The PM5020 power meter allows the connection and control of two up to 12 VDC fans with adjustable sup-
ply voltage or by adjustable number of revolutions per minute (rpm) for 3-wire fans with tacho input.
This feature reserves an extra power supply for fan-cooled sensors, such as the S322C, or can be used to
run other cooling fans in the optical setup.
The fans can be operated by:
• Setting of the DC voltage up to 12 V.
• Setting a fan speed, depending on the temperature detected by either the built-in sensor temperature
sensor or a connected external NTC. Set a start temperature and a maximum temperature where the fan
runs at full speed. The speed will increase with rising temperature.
• Setting of the rpm when the fan provides a tacho signal. In this case please set the maximum rpm and
the desired rpm.
Open the Fan Setup Control menu in the Settings Menu to adjust the fan control settings.
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