Auto Shutoff
There is no power o
ff
button. The display unit automatically turns itself o
ff
after about 1
½
minutes of no activity. To turn back on, simply press the
POWER
button.
Other SDI-12 Sensors
The SDI-12 reader unit may be used with other third party SDI-12 sensors. Please note
that the reader unit will only issue M! commands. There is no support for additional
measurement commands, e.g. M1! through M9!
Battery
The reader is powered by a 9V alkaline battery. If the battery voltage level drops too low
(less than about 7.5V), when the unit is powered on a “*** LOW BATTERY ***” message
will be scrolled across the display—you should change the battery if this message is
shown. Open up the compartment on the back of the unit, disconnect the old battery and
replace with a new 9V alkaline battery, close the battery compartment.
NOTE
: you can still take readings if the low battery message is received, however in many
cases sensor reading accuracy is not guaranteed for a supply voltage of less than 7.5V.
Connector Pinout
Connector type:
Switchcraft EN3L4F
Mating connector type: Switchcraft EN3C4M
Pin 1
Power (+9VDC)
Pin 2
SDI-12 I/O
Pin 3
not used
Pin 4
Ground/Common
SDI-12 Alligator Clip Adapter
The SDI-12 Alligator Clip Adapter can be used to connect the SDI-12 display unit to 3rd-
party SDI-12 sensors. Connections of the alligator clips should be as follows:
Red
:
Sensor’s power wire
Green
: Sensor’s negative/ground wire
Black
: Sensor’s SDI-12 serial data I/O wire
G r o w i n g i n n o v a t i o n .
3
GroPoint™ is a division of RioT Technology Corp.
1 833 GRO-POIN (N. America) or 250 412 6642
gropoint.com
