Autogrow Nutritest User Manual
Nutritest
User Guide
Simple to use
Long battery life, automatically enters power saving mode
Portable and compact design
Simultaneously display EC(CF), pH and temperature readings
128 x 64 pixel LCD screen with adjustable contrast
Calibration of EC, pH and temperature readings
Can be used in constant monitoring (automatic) or “sample on demand” (manual) mode
Data logging of previous 10 readings when in manual mode
Alarm buzzer when in automatic mode
User selectable units for nutrient (EC/CF/TDS) and temperature (°C/°F)
Settings and calibration retained when battery is removed
Nutritest Manual
© 2013 Autogrow Systems Ltd
1
Description
The Autogrow Nutritest is a combined nutrient, pH and temperature portable meter. It has been designed to be
easy to use and consume minimal energy. It can be used easily in the field, requiring no external power. It
operates either as a monitor, periodically taking readings, or as a “sample on demand” meter, taking readings
when required. All readings are displayed simultaneously on screen, minimizing the need to scroll through
different readings. The Nutritest comes with a permanently attached EC probe and a removable pH probe
which can be replaced as required.
Applications
Hydroponics
Nurseries
Runoff monitoring
NFT
Operation
Powering up the Nutritest
If nothing is shown on screen and a battery is installed simply press any of the 4 buttons and this will wake up
the device.
Powering Down the Nutritest
The Nutritest can be put into power saving mode manually when the main screen is displayed by pressing the
down button and holding it for 3 seconds. The display will then be powered down and the device will consume
a minimal amount of energy.
Auto Power Down
The Nutritest will enter a power saving mode when no button has been pressed for 5 minutes, except for when
it is in automatic sampling mode. The screen will be turned of and the device will be inactive. To power up the
device press any key. During power saving mode all settings and the data log will be saved.
Sampling Modes
Manual
In this mode the Nutritest samples when the left button is pressed. Sampling takes about half a second and
during this time the buttons are not active. To show sampling is in progress the readings are highlighted. To
exit this mode and make adjustments press the right button to navigate to the main menu screen. The
sampling mode can be changed to automatic or manual as described on page 5 in the “Settings” section.
Automatic
In this mode the Nutritest can be used to display a constant readout. A sample is taken every 10 seconds.
During sampling the readings are highlighted and the buttons are inactive. In this mode the alarm settings
apply as described on page 4 in the “Alarms” chapter.
Nutritest Manual
© 2013 Autogrow Systems Ltd
2
How to Navigate through the Menus
The main menu screen can be accessed from the main display screen. From this screen all other settings and
calibration can be accessed as shown in the diagram below. To scroll through the menu options use the up
and down buttons. To select a menu option use right button and to exit a menu screen use the left button.
When calibrating or adjusting a numerical value hold the up or down buttons down to increase or decrease the
value. This will change the value every ¼ of a second that the button is held down. When adjusting a setting
press the up or down button once then release. The setting will change on each button press. To save a
calibration, value or setting adjustment, press the right button. To cancel, press the left button. Either of these
will return to the menu used to access the adjustment.
Main menu
Calibration
Calibration
Temperature
Calibration
Reset
Calibration
Setup
Units
Contrast
Sample
mode
Key tone
on/off
Alarms
(Auto only)
pH Alarms
EC Alarms
Temperature
Alarms
Alarm on/off
History
Reset EC
Calibration
Reset Temp
Calibration
Reset pH
Calibration
Set EC Units
Set Temp
Units
Main Display
Only accessible in
automatic mode
Only accessible in
Manual mode
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