OneTemp TCT303F Operating Instructions

T C T 3 0 3 F T h e r m o m e t e
T C T 3 0 3 F T h e r m o m e t e
The thermometer is a non-contact infrared
thermometer, also with Probe thermometer. You can
select only one Mode at the same time but can
change the Mode at will. Please remember to keep
away from baby and children and don't use it for
safety related applications.
* Special Features:
1. HACCP Zone Display;
2. Splash Proof (IP65)
In Non-contact Infrared Thermometer
function (IRT Mode)
# The white light will automatically turns on
while the Scan button is pressed.
Simply aim the thermometer at the measure target with "Infrared Lens"
Distance:Spot (FOV)= 2.5:1
and press Scan (infrared) key to display the surface temperature. The
Emissivity = 0.1~1 Step.01
distance to target ratio is 2.5:1 therefore the thermometer should be
Wave Length = 8um-14um
positioned as close to the target as possible.
While scanning, the newest temperature will be updated on the LCD and the measurement will continue as long as
the Scan (infrared) key is depressed. When the Scan (infrared) key is released, icon "Hold" will appear on the display
and the last measurement will remain visible for 15 seconds before the display goes blank.
The thermometer will automatically shut off if left idle for more than 15 seconds.
Mode Selection MIN  MAX  LOCK 
MINIMUM OR MAXIMUM MODE
The thermometer will display the minimum or maximum reading during the measurement period only until the Mode
key is pressed.
To utilize the minimum mode, please press Scan (infrared) key  Mode key  Scan (infrared) key. And keep
pressing Scan (infrared) key for measurement.
To utilize the maximum mode, please press Scan (infrared) key  Mode key *twice Scan (infrared) key. And keep
pressing Scan (infrared) key for measurement.
LOCK MODE
The lock mode is particularly useful for continuous monitoring of temperatures. The thermometer will continuously
display the temperature for up to 60 minutes or until the Scan (infrared) key button is pressed.
To utilize the lock mode, please press Scan (infrared) key  Mode key *three times Scan (infrared) key.
o o
C OR F MODE
o o
To change the ' C' or ' F' mode, please press Scan (infrared) key  Mode key *four times Scan (infrared) key.
Same steps can be taken when switching from
EMISSIVITY
The infrared thermometer is supplied with a default emissivity of 0.95. The emissivity can be changed from 0.10 (10E)
to 1 (100E). Changes should only be carried out by experienced personnel. For information relating to the emissivity
of specific materials, please contact the nearest retailer. Note: non-contact infrared thermometers are not
r O p e r a t i n g I n s t r u c t i o
r O p e r a t i n g I n s t r u c t i o
o C/ o F  EMIS
o o
F to C.
n s recommended for use in measuring the temperature of shiny or polished metals.
n s
To change the emissivity, please Scan (infrared) key  Mode key *five times Scan (infrared) key for each 0.01
(1E) adjustment Mode key.
In Contact Thermocouple Probe function (COT Mode)
Attach the thermometer at the measure target with "Probe" and press Probe key to continuously display the
temperature for up to 4 minutes. After that the device will automatically shut off to extend the battery life. Press Probe
key will interrupt the scanning to display the last temperature with a 'Hold' wording. To reenter scanning just press
Probe key again.
1. Do not twist the probe and rotate the probe in wrong direction.
2. Over stress on probe may cause break.
3. After measure high temp, the probe may remain HOT for a while.
4. Probe is dangerous for human when the probe is in an open position. Remember to hold the probe back
when not in use.
The probe of contact thermometer may be damaged if exceeding the specification of measurement
temperature range.
To avoid electric shock and thermometer damage, do not measure live circuit where voltage exceeding
24V AC RMS or 60V DC with the thermocouple probe.
HACCP check
The "HACCP CHECK" feature is incorporated in our thermometer temperature to graphically indicate critical
temperature zone. The icons and LED indicators located above the
display indicate a food product stays in a safe or unsafe HACCP
" Danger Zone" temperature. The green and red LED light will always
be lit before power off.
A Green LED appears with icon "
condition below 4
holding temperature above 60
When temperature is between 4
" " will appear and indicate that the temperature is fallen within the
HACCP "Danger Zone" from 4
STORAGE & CLEANING
Clean the device with a damp cloth. Do not use any solvents such as Acetone as they corrode the plastic. Isopropyl
alcohol may be used to disinfect. Do not submerge any part of the thermometer. The thermometer should be stored
at room temperature between –20 to +65°C (-4 to 149°F).
LCD ERROR MESSAGES
The thermometer incorporates visual diagnostic messages as follows:
「 」 「
「 」 「
" indicates a safe cool or frozen
o C(40 o F) or appears with icon " " indicates a safe
o C(140 o F).
C and 60 C, the red LED with icon
o o
.
o C to 60 o C (40~140 o F)
'Hi' or 'Lo' is displayed when the temperature being measured is outside of the
measurement range.
」
'Er2' is displayed when the thermometer is exposed to rapid changes in the
ambient temperature. 'Er3' is displayed when the ambient temperature exceeds
o o o o
」 0 C (32 F) or +50 C (122 F). The thermometer should be allowed plenty of time
(minimum 30 minutes) to stabilize to the working/room temperature.