iRIS 350FX Reference Manual V1.50
63
HyQuest Solutions (NZ) Ltd
- PO Box 9466, Hamilton, New Zealand Tel: +64 7 857-0810 Email: [email protected]
Connecting an Up/Down Water Level Instrument
A relatively common type of digital water level instrument is one that provides two pulse outputs. One output
generates a pulse for each increment and the other for each decrement in level. The iRIS maintains a record
of these steps and therefore the relative level.
This instrument type is NOT the same as a quadrature encoder which uses the relative phase of the two
signals to determine direction. See Section
for details on the quadrature sensors.
These instruments normally require a 12V supply and this is readily obtained from the iRIS. A supplementary
12V battery can be connected if desired. Typically, this type of instrument requires very little current, so the
internal iRIS battery will normally suffice.
The diagram below shows the required connects for such an installation. The incrementing output must be
connected to DI1 and the decrementing output to DI2.
TOP
iRIS I/O Connector
BOTTOM
A typical sensor configuration example for this type of
installation is shown below. The instrument is a standard
digital up/down water level encoder. The level is averaged and
the result logged every 15 minutes.
AI4
AI3
AI2
AI1
AGND
AOUT
DIO4
DIO3
DIO2
DIO1
SDI-12
DGND
12V+
GND (-)
VIN+
GND (-)
- +
External
12V Battery
(Optional)
DN
Up/Down
UP
Water Level
+12V
Sensor
0V
Charging source
e.g. solar panel
Name: Water Lvl
Source: 15. Up/Down Encoder
Process Mode: Period Average
Multiplier: 0.001
Offset: 0.0000
Log Rate: 15 mins
Summary of Contents for iRIS 350FX
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