Nova-Tech 4238-4239-4240 TRACEABLE HIGH ACCURACY REFRIGERATOR THERMOMETER - Manual

VIEWING THE TIME-OF-DAY/DATE
To view the time-of-day/date, slide the DISPLAY switch to
the DATE TIME position.
DISPLAYING °F OR °C
To display the temperature readings in Fahrenheit or
Celsius, slide the °C/°F button to the desired position.
DISPLAYING PROBE 1 OR PROBE 2
Slide the PROBE switch to the desired position (1 or 2) to
display the desired temperature sensor readings.
MINIMUM AND MAXIMUM MEMORY
There are four points that are automatically recorded into
memory:
• Minimum (MIN) Probe 1 (P1) Temperature
Achieved with time-of-day and date achieved
• Maximum (MAX) Probe 1 (P1) Temperature
Achieved with time-of-day and date achieved
• Minimum (MIN) Probe 2 (P2) Temperature
Achieved with time-of-day and date achieved
• Maximum (MAX) Probe 2 (P2) Temperature
Achieved with time-of-day and date achieved
Minimum and maximum temperature memories
are NOT programmable. The minimum temperature
recorded into memory is the minimum temperature
achieved since the last time the memory was cleared.
The maximum temperature recorded into memory is
the maximum temperature achieved since the last time
the memory was cleared. The minimum and maximum
temperature memories are maintained over the period
since the memory was cleared.
Minimum and maximum memories are recorded for both
sensors regardless of the display mode.
VIEWING MIN/MAX MEMORY
1. Slide the PROBE switch to the desired position (1 or
2) to display the desired temperature sensor readings.
2. Slide the DISPLAY switch to the MIN MAX position.
The display will show the current temperature and
minimum/maximum memory for the selected probe.
VIEWING MIN/MAX MEMORY DATE/TIME
1. Slide the PROBE switch to the desired position (1 or
2) to display the desired temperature sensor readings.
2. Slide the DISPLAY switch to the MIN MAX position.
The display will show the current temperature and
minimum/maximum memory for the selected probe.
3. Press the EVENT DATE TIME button, the minimum
temperature achieved by that probe along with the
time-of-day/date the temperature was achieved will
appear on the display (indicated by MIN and TIME
appearing on the display).
4. Press the EVENT DATE TIME button a second time,
the maximum temperature achieved by that probe
along with the time-of-day/date the temperature was
achieved will appear on the display (indicated by
MAX and TIME appearing on the display).
Note: If no button is pressed for fifteen (15) seconds,
the unit automatically returns to the current temperature
display mode.
5. To exit from the memory display mode, press and
release the EVENT DATE TIME button until MIN or
MAX no longer appears on the display, or simply do
not press any button for fifteen (15) seconds.
CLEARING THE MINIMUM/MAXIMUM MEMORY
1. Slide the PROBE switch to the desired position (1 or
2) to display the desired temperature sensor readings.
2. Slide the DISPLAY switch to the MIN MAX position.
The display will show the current temperature and
minimum/maximum memory for the selected probe.
3. Press the CLEAR MIN MAX button to clear the
minimum and maximum memories for the probe
being displayed.
ALARMS
Both temperature sensor (P1/P2) alarm limits may be set
in 0.1° increments. Probe 1 and Probe 2 alarm limits are
set independent of each other.
With the alarm switch set to the ON position:
-The unit will sound an alarm and flash the corresponding
LED (P1/P2) when the temperature measured is outside
the alarm limits that have been set (equal to or lower than
the low alarm set point, or equal to or greater than the
high alarm set point).
-The alarm will sound regardless of which sensor is being
displayed and regardless of the display mode. Example:
If Probe 1 is being displayed and the DISPLAY switch is
set to MIN MAX, but Probe 2 reaches an alarm condition,
the alarm will sound and the P2 LED will flash.
SETTING THE TEMPERATURE ALARM LIMITS
1. Slide the PROBE switch to the desired position (1 or
2) to display the desired temperature sensor readings.
2. Slide the DISPLAY switch to the ALARM position.
The display will show the current temperature and
low/high alarm set points for the selected probe.
3. While in the alarm display mode, pressing the SELECT
button will allow the alarm limits to be set.
Pressing the SELECT button will cause the digits to
flash in the following order: Low Alarm 1st Digits→Low
Alarm 2nd Digit→Low Alarm Decimal Digit→ High Alarm
1st Digits→High Alarm 2nd Digit→High Alarm Decimal
Digit→No digits flashing (value set).
4. Once the desired item is flashing, pressing the
ADVANCE button will increment the value.
5. With the desired alarm set points appearing on the
display, press the SELECT button until no digits
are flashing on the display. The alarm settings will
be saved.
Note: While in the setting mode, if no button is pressed
for fifteen (15) seconds, the unit automatically exits from
the setting mode.
SPECIFICATIONS
Range: -58.00 to 158.00 °F
-50.00 to 70.00 °C
Accuracy: ±0.3 °C
Resolution: 0.01°
Update Rate: 1 second (FAST)
10 seconds (NORMAL)
Battery: 2 each AAA (1.5V)
Probes Supplied:
Model 4238-- Supplied with 1 bottle probe. Designed
for use in refrigerators and freezers, bottle probes are
filled with a patented nontoxic glycol solution that is
GRAS (Generally Recognized As Safe) by the FDA
(Food and Drug Administration) eliminating concerns
about incidental contact with food or drinking water.
The solution filled bottle simulates the temperature
of other stored liquids. Velcro ® and a magnetic strip
are provided to mount the bottle to the inside of a
refrigerator/freezer. The micro-thin probe cable permits
refrigerator/freezer doors to close on it. (Do not
immerse bottle probes in liquid).
Model 4239-- Supplied with dual bottle probes. (Do not
immerse bottle probes in liquid)
Model 4240-- Supplied with dual standard probes with
cables. Designed for use in air and liquids, the sensor
and cable may be completely immersed.
SETTING THE TIME-OF-DAY/DATE
Slide the DISPLAY switch to the DATE TIME position, the
display will show the time-of-day and date.
While in the time-of-day/date display, pressing the
SELECT button will allow the date and time to be set.
Pressing the SELECT button will cause the digits to flash
in the following order Year→Month→Day→Hours→
Minutes →12/24 hour time→No digits flashing (value
set). Once the desired item is flashing, pressing the
ADVANCE button will increment the value.
While in the time-of-day/date display, pressing the
EVENT DATE TIME button will switch the date display
between Month/Day (M/D) and Day/Month (D/M).
With the desired time-of-day/date appearing on the display,
press the SELECT button until no digits are flashing on the
display. The time-of-day/date will be saved.
Note: While in the setting mode, if no button is pressed
for fifteen (15) seconds, the unit automatically exits from
the setting mode.
VIEWING THE TEMPERATURE ALARM LIMITS
1. Slide the PROBE switch to the desired position (1 or
2) to display the desired temperature sensor readings.
2. Slide the DISPLAY switch to the ALARM position.
The display will show the current temperature and
low/high alarm set points for the selected probe.
ENABLE/DISABLE ALARMS
To enable the alarm to activate when a temperature
measured is outside the alarm limits, slide the ALARM
switch to the ON position.
When the alarm is enabled, both Probe 1 and Probe 2
alarm set points will be monitored. If either sensor reaches
an alarm condition, the alarm will activate. It is not possible
to enable the alarm for one sensor and disable the alarm
for the other sensor.
To disable the alarm so that no alarm sounds when a
temperature measured is outside the alarm limits, slide
the ALARM switch to the OFF position.
ALARM SOUNDING
With the alarm enabled, the unit will sound an alarm and
the corresponding (P1/P2) red LED will flash when a
temperature being measured is outside the alarm limits
that have been set (equal to or lower than the low alarm
set point, or equal to or greater than the high alarm set
point). Until it has been acknowledged/silenced (see
the “Acknowledge/Silence An Alarm” section), the alarm
will sound and corresponding (P1/P2) red LED will flash
continuously for the first sixty (60) seconds. After 60
seconds, the alarm will sound and LED will flash for ten
(10) seconds every minute.
If the alarm is sounding based on the low alarm limit and
the probe temperature is being displayed, “LO ALM” will
also flash on the display. If the alarm is sounding based
on the high alarm limit and the probe temperature is
being displayed, “HI ALM” will flash on the display.
The alarm will sound and corresponding LED will flash
regardless of which sensor is being displayed and
regardless of the display mode. Example: If Probe 1 is
being displayed and the DISPLAY switch is set to MIN
MAX, but Probe 2 reaches an alarm condition, the alarm
will sound and the P2 LED will flash.
The unit will continue to alarm and flash the corresponding
(P1/P2) red LED until the alarm has been acknowledged/
silenced by either pressing the SILENCE ALM button or
by sliding the ALARM switch to the OFF position (see the
“Acknowledge/Silence An Alarm” section). The unit will
continue to alarm and flash the corresponding (P1/P2) red
LED even if the temperature being measured returns to an
in-range/non-alarm condition.