HS AD375MA, Инструкция по эксплуатации

Страница: 13 / 26

HyQuest Solutions Pty. Ltd.
Model AD375MA
© Copyright
Page 13
Issue 3 July, 2017
Screwless Terminals
The plug in terminal block shown is a screwless terminal that keeps a constant tension on the
wire that is inserted. (The mating socket on the front panel of the AD375MA is sealed with a
waterproofing gasket.)
External Power
Even though the Shaft Encoder's have an internal lithium battery, the unit should only be
operated if +12VDC (9.0V to 16VDC) power is connected. This guarantees continuing
correct pulse counting and SDI-12 operation. (The internal lithium batteries are for backup
purposes only – it will allow the water level to be continuously measured for up to 2 months
with no ex12V ! )
An adequate 12VDC (9 to 30VDC) battery and charger option should be used if the optically
isolated 4-20 mA current loop is to be powered continuously and independently of the
telemetry module or data logging equipment.
The AD375MA must have +12VDC power (9.0V to 16V DC) connected for correct
operation.
1. Use a small flat blade
screwdriver and push-in
on the orange groove.
2. Insert the stripped
wire here.
3. Release the orange
part to put secure the
wire.
4. Pull on the wire to
make sure it is secure.
Multimeter probe can be
inserted here !!!
0V
+12V
SDI-12 Data
0V
To data logger