+Enabling multimeter / data logger measurement output
+----------------------------------------------------
+
+Some multimeters or data loggers will not start outputting measurement data
+unless a certain action has been performed by the user beforehand. This is
+usually mentioned in the vendor manual of the respective device, but here's
+a short list for convenience:
+
+ - BBC Goertz Metrawatt M2110: Briefly press the "Start/Reset" button on the
+ interface panel on top.
+ - Digitek DT4000ZC: Briefly press the "RS232" button.
+ - Gossen Metrawatt Metrahit devices: Power on the device with the "DATA"
+ button pressed. Additionally, Metrahit 2x devices must be configured for
+ interface "RS232".
+ - Norma DM950: If the interface doesn't work (e.g. USB-RS232 converter), power
+ on the device with "FUNC" pressed (to power the interface from the DMM).
+ - PCE PCE-DM32: Briefly press the "RS232" button.
+ - RadioShack 22-812: Press and hold "SELECT" and "RANGE" together.
+ - TekPower TP4000ZC: Briefly press the "RS232" button.
+ - Tenma 72-7750: Briefly press the "RS232C" button.
+ - UNI-T UT60G: Briefly press the "RS232C" button.
+ - UNI-T UT61B/C/D: Press the "REL/RS232/USB" button for roughly 1 second.
+ - UNI-T UT325: Briefly press the "SEND" button (as per manual). However, it
+ appears that in practice you don't have to press the button (at least on
+ some versions of the device), simply connect the device via USB.
+ - V&A VA18B/VA40B: Keep the "Hz/DUTY" key pressed while powering on the DMM.
+ - Victor 70C/86C: Press the "REL/RS232" button for roughly 1 second.
+ - Voltcraft VC-830: Press the "REL/PC" button for roughly 2 seconds.
+
+