Xylem WQ-FDO Sensor and GL500-7-2 Data Logger - Manual (Page 30)

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XV. Connections:
Left Connector:
P2+ Pulse channel 2 +, connected to VBAT
P2 IN Pulse channel 2 pulse input
P1+ Pulse channel 1 +, connected to VBAT
P1 IN Pulse channel 2 pulse input
SMP+ Sample-On-Demand +, VBAT
SMPL Sample-On-Demand pulse input
GND Spare Ground
GND Spare Ground
VBAT Spare positive battery connection
VBAT Spare positive battery connection
GND Negative battery connection
VBAT Positive battery connection
Right Connector:
V+ Switched sensor power
CH1 Analog channel 1 input
GND Sensor ground
V+ Switched sensor power
CH2 Analog channel 2 input
GND Sensor ground
V+ Switched sensor power
CH3 Analog channel 3 input
GND Sensor ground
V+ Switched sensor power
CH4 Analog channel 4 input
GND Sensor ground
V+ Switched sensor power
CH5 Analog channel 5 input
GND Sensor ground
V+ Switched sensor power
CH6 Analog channel 6 input
GND Sensor ground
V+ Switched sensor power
CH7 Analog channel 7 input
GND Sensor ground
GND Spare ground connection