Manual – Starflow QSD Model 6527B and 6537A
Unidata Manual - 6527B and 6537A Starflow QSD User Manual 08 05 2023.docx
Page 11
3.11.
Instrument Wiring Table
Variants for Wiring are detailed below.
Brown Wire Variant
Starflow QSD / Wire Colour
Function / Signal Name
White
SDI-12
Brown
Power
Green
Ground
Yellow A-
(Modbus)
Pink
B+ (Modbus)
Grey
One-Wire
*
Red Wire Variant
Starflow QSD / Wire Colour
Function / Signal Name
White SDI-12
Red
Power
Yellow Ground
Orange A-
(Modbus)
Blue B+
(Modbus)
Grey One-Wire
*
* Use with Unidata 6515 QSD Barometric Reference Module
When the Unidata 6515 QSD Barometric Reference module is connected, the instrument
will automatically handle the barometric correction and report the actual water level
instead of the water head plus atmospheric pressure.
Suppose your data logger has a barometric sensor. In that case, the data logger
program must perform the barometric correction, OR the user can perform a post-
processing method to correct for barometric changes by using barometric pressure data
from a trusted source such as a weather department or another barometer close by.
The 6515 QSD Barometer Reference module should be:
a) Mounted in an enclosure near the data logger in a position protected from the
elements.
b) The enclosure should be vented to expose the barometer sensor to atmospheric
pressure variations.
