The Easy Fridge/Freezer Alarm
Monitors a Refrigerator and a Freezer
Two Dimensional Instruments, LLC
(502) 243-0042
Side of the Alarm
This is the screen you will normally see when
the alarm is in operation
Data Display
The main or chart display screen
Two Dimensional Instruments, LLC
(502) 243-0042
The chart display is automatically drawn as
data from the sensors is stored in RAM memory.
The Display Screen
Two Dimensional Instruments, LLC
(502) 243-0042
The current conditions are always visible
and are updated every few seconds
Sensor 1 current temperature
Sensor 2 current temperature
Two Dimensional Instruments, LLC
(502) 243-0042
The chart also shows the temperature
history of one of the sensors
The 1 in the upper right corner indicates that this
chart is for sensor #1. In this case the refrigerator sensor
Two Dimensional Instruments, LLC
(502) 243-0042
The current date and time is displayed here
in the lower right corner of the display
Two Dimensional Instruments, LLC
(502) 243-0042
The alarm has a 40 hour backup battery which
continues to operate the alarm during a power failure
This icon indicates how much charge the battery has left
Two Dimensional Instruments, LLC
(502) 243-0042
The battery should be changed at least once a year
Or if this icon shows the battery is only ½ charge
Two Dimensional Instruments, LLC
(502) 243-0042
The alarm will store 1.5 years of temperature history for each of
the two sensors if temperature is stored once every 10 minutes.
The dates along the top refer of the chart refer
to the stored and displayed data.
Two Dimensional Instruments, LLC
(502) 243-0042
The display can show several hours, several days
or even more than a year of the temperature history
This is the temperature history line for the #1 sensor
Two Dimensional Instruments, LLC
(502) 243-0042
The temperature scale is always on the left side of the chart.
Two Dimensional Instruments, LLC
(502) 243-0042
If you are viewing the refrigerator chart and want to
see the freezer chart push the escape key (ESC)
The display flips back and forth between the two
sensors each time you press the ESC key.
Two Dimensional Instruments, LLC
(502) 243-0042
After pressing the ESC key the display shows the temperature
history for sensor #2, in this case the freezer.
Two Dimensional Instruments, LLC
(502) 243-0042
If we push the ESC key again we
go flip back to the Refrigerator chart.
Two Dimensional Instruments, LLC
(502) 243-0042
This chart will show about 30 hours of temperature history
if you sample temperature once every 10 minutes.
The main or chart display screen
Two Dimensional Instruments, LLC
(502) 243-0042
How do we look at more than 30 hours of temperature history?
The main or chart display screen
Two Dimensional Instruments, LLC
(502) 243-0042
Push the Zoom-out key
to double the amount of data displayed.
(Push it once and the chart will show 4 days, again and it will show 8
days, once more and you will see 16 days, etc…)
Two Dimensional Instruments, LLC
(502) 243-0042
Now we are looking at 60 hours of data. Push it again and
you will see 120 hours (5 days) of data on the chart.
We have zoomed out to show twice as much data.
Two Dimensional Instruments, LLC
(502) 243-0042
Let’s look at the end with all of the connections.
Side of the Alarm
Two Dimensional Instruments, LLC
(502) 243-0042
The power from the wall transformer
plugs into this socket
Two Dimensional Instruments, LLC
(502) 243-0042
This is an external relay to trigger an Auto Dialer
or external alarm
If you use the optional Auto Dialer up to 4 people will
get a phone call if the ThermaViewer goes into alarm mode.
Two Dimensional Instruments, LLC
(502) 243-0042
Sensor #1, usually the refrigerator, plugs in here
Two Dimensional Instruments, LLC
(502) 243-0042
Sensor #2, usually the Freezer, goes here.
Two Dimensional Instruments, LLC
(502) 243-0042
This is the serial port so that the stored data can be
downloaded to a computer
Two Dimensional Instruments, LLC
(502) 243-0042
This is a contrast control so the display can
be adjusted for the light conditions.
Turn it left or right with a small screw driver to lighten
or darken the display
Two Dimensional Instruments, LLC
(502) 243-0042
And lastly there is a reset button.
Pressing the reset button causes the display to reset,
without erasing your stored data, if you have a good battery installed.
Two Dimensional Instruments, LLC
(502) 243-0042
That about covers the physical characteristics of the alarm
Additional information can be found in the users guide,
which can be downloaded from our web site.
Two Dimensional Instruments, LLC
(502) 243-0042
Now let’s talk about the Menu system.
The Menu system is where you can change settings, such
as; the sample rate, the display parameters, the high or low
alarm points for the sensor, etc...
Normally you will set these variables once when you first
boot up the system and not ever have to reset them.
However you can change them at any time.
Two Dimensional Instruments, LLC
(502) 243-0042
To enter the menu system press the enter key (ENT)
Pressing the enter key once will call up the main menu.
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(502) 243-0042
This is the main menu.
Two Dimensional Instruments, LLC
(502) 243-0042
Here we can go to the system setup menu
The system setup menu is where we set the date and time.
Two Dimensional Instruments, LLC
(502) 243-0042
We can also enter the sensor setup menus
from this main menu.
There is a sensor setup menu for each sensor.
Two Dimensional Instruments, LLC
(502) 243-0042
This is the sensor setup menu where we
could change the chart display parameters.
These setting are for the chart display only, not the alarm.
Two Dimensional Instruments, LLC
(502) 243-0042
Or you can go into the alarm menu to
change the high-low alarm settings.
Each sensor has its own high and low alarm settings
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(502) 243-0042
The alarms are set by specifying a
temperature and a delay time.
In this example the alarm will go off if the temperature is above 5.5°F for more
than 30 minutes or if the temperature is less than 1.5°F for more than 45 minutes.
Two Dimensional Instruments, LLC
(502) 243-0042
Setting a delay time avoids false alarms caused by momentary rises
in temperature from opening the fridge door.
When an alarm occurs an internal buzzer goes off, the screen blinks and the
relay closes so the optional auto dialer calls up to four difference people.
Two Dimensional Instruments, LLC
(502) 243-0042
Alarm settings can be changed at any time
If you are using a sensor for both temperature and humidity you can set
high-low points for both conditions.
Two Dimensional Instruments, LLC
(502) 243-0042
Lastly, here is the calibration menu. Each sensor
can have one, two or three calibration points.
Any offset entered here will affect the temperature collected, stored and
displayed
Two Dimensional Instruments, LLC
(502) 243-0042
To exit from this or any other menu press the ESC button until you
arrive back at the main display screen
Two Dimensional Instruments, LLC
(502) 243-0042
Which sooner or later takes you back to here
The main or chart display screen
Two Dimensional Instruments, LLC
(502) 243-0042
Please see the ‘Care and Use’ guide for more
detailed information on the Fridge-Freezer Alarm
The ‘Care and Use’ guide can be downloaded as a PDF from our website:
www.e2di.com
Two Dimensional Instruments, LLC
(502) 243-0042