7.12 Accessory options
7.12 Accessory options
Some meters can be equipped/retro-fitted with optional accessories if they include firmware feature version
≥
40.
See section
??
for details on the accessory commands.
The accessories tab (shown in 7.50) is available when selecting a device that has the appropriate firmware:
Figure 7.50: Accessories tab
7.12.1 Humidity accessory
The humidity sensor accessory option is currently not available for the SQM-LU-DL-V.
7.12.2 Display accessory
The display accessory option is currently not available for the SQM-LU-DL-V.
7.12.3 LED accessory
The SQM-LU-DL-V has the LED accessory hardware built in to the back panel.
The LED indicator accessory is mainly used for troubleshooting to identify either when readings are created or requested.
The LED draws current and it may not be desireable to enable it when operating from the battery pack. The LED blinks
for 1/60th of a second.
The LED can blink either when the SQM-LU-DL-V creates a reading, of when a reading is requested (using the rx
command).
7.12.4 Relay accessory
The Relay accessory is mainly used for dew heater control. A 3.3V activated solid state relay can be connected directly
to pin 23 of the microcontroller (25mA drive maximum).
When in Manual mode, the relay can be turned on or off.
When in Automatic mode, the relay is turned on when the mpsas reading is above the threshold and off when the
mpsas reading is below the threshold.
Pressing the On/Off buttons while the realy is in automatic mode will switch it to manual mode.
Unihedron SQM-LU-DL-V Operator’s Manual -
20211013
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Summary of Contents for SQM-LU-DL-V
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