Cojali JT2005 User manual
JT2005
Infrared Thermometer
Operation Manual
Overview
Product Features
Safety Instructions
Specications
Function Description
Operations
⚠
Please do not aim at people or animals with the laser directly or indirectly.
Please do not look at the laser directly or through other optical tools (telescope, microscope, etc.).
If the battery symbol on the LCD display is ashing, replace the batteries immediately to avoid inaccurate
measurements before using the thermometer.
Inspect the case before using the thermometer. Do not use the thermometer if it is damaged. Look for cracks or
missing plastic.
Please refer to the emissivity information for the actual temperature. Reective objects can cause the actual
temperature value to be higher than the measured temperature value. When measuring these objects, please be
aware of not to touch very hot surfaces.
Do not use the thermometer in an explosive gas, steam or humid environment.
To ensure measurement accuracy, place the thermometer in the test environment for more than 30 minutes before
using it.
Avoid keeping the thermometer near very hot objects for a long time.
JT2005 is a professional non-contact infrared thermometer (hereinafter referred as thermometer) can determine surface
temperature measuring the infrared energy radiated by the target surface. JT2005 can measure temperatures from -35
°C to 850°C. This 20:1 ratio meter can store up to 99 sets of data and perform scheduled measurement with a maximum
interval of 96 hours between the two measurements. This thermometer is also IP65 rated and can withstand 3 meters
drop.
GE Certication: EN61326-1: 2013
Laser Safety Standard: EN60825-1: 2014
Warning
Power On and Off
Manual Measurement
MAX/MIN/AVG/DIF Value Reading
HIGH Alarm ON/OFF
Lock Measurement
Note: During measurement, the target must be larger than the light spot to ensure accuracy. Please refer to the D:S values.
Safety Standards
Reference Standards: JJG 856-2015
Strong and Durable: Passed 3m drop test.
Dustproof and Waterproof: Passed IP65 level dustproof and waterproof tests.
Ergonomic Design: Comfortable handheld, simple and convenient operation.
MAX/AVG/DIF/MIN: Can quickly display the maximum, minimum, average and difference value (between maximum and
minimum) during measurement.
Large Backlight Screen: Large screen, bold fonts, and uniform white backlight combined make it an attractive display.
Alarm Function: High and low temperature alarm is displayed with a ashing LED and symbol, in order to easily observe
the exceeded measurement results when alarm is triggered.
Dual-wavelength rotatable Laser indication: Allows you to accurately and quickly determine the area to be measured.
Data Storage: Storages up to 99 groups of data for measurement analysis.
Scheduled Measurement: Sets a time point in which the thermometer will be automatically turned on and performs
measurement once every interval is preset, the maximum interval is 96 hours.
Monitoring Measurement: Sets a time interval, after which the thermometer will be automatically turned on and then
performs measurements.
To avoid eyes or personal injury, please read the following safety instructions before using the thermometer:
Functions
Temperature Range -35ºC~850ºC(-31ºF~1562ºF)
Accuracy
21ºC ~25ºC (70ºF~77ºF)
≥0ºC: ±1.8ºC or ±1.8% of reading, whichever is greater <0ºC: ±(10% of reading + 1.8ºC)
≥32ºF: ±3.6ºF or ±1.8% of reading, whichever is greater <32ºF: ±(10% of reading + 3.6ºF)
Temperature coefcient 0.1ºC/ºC (0.1ºF/ºF) or ±0.1% of reading per degree, whichever is greater
D:S Ratio 20:1 (calculated when energy is 90%)
Emissivity 0.1~1.0 adjustable
Response Time 250ms (95% of reading)
Spectral Response 8um~14um
Resolution 0.1ºC (0.1ºF)
Repeatability 0.8°C or 0.8% of reading, whichever is greater
Number of lasers Dual Lasers
Laser type CLASS II
Laser wavelength 630nm~670nm
Laser power <1mW
Battery type 9V Battery (1604A)
Battery life ≥16H
Product size 189 x 118 x 55mm
Weight 292g
Operating temperature 0ºC~50ºC (32ºF~140ºF)
Storage temperature -20ºC~60ºC (-4ºF~140ºF)
Operating humidity <90% RH (non-condensing)
Operating altitude 2000m
Protection level According to IEC60529, complies with IP65
Drop test 3m
Temperature measurement lock trigger
Laser on
High and low limit alarm
Low battery
Temperature measurement trigger
Measurement data hold
Unit
Measurement value on main display
Measurement value on secondary display
Emissivity
Data storage mode
Scheduled measurement
Monitoring measurement
Auto shutdown protection
Mode
Gently pull the trigger to power on thermometer, LCD screen and the backlight will be turned on.
The thermometer will be powered off automatically without operation for 8s.
Pull and hold the trigger after aiming at the target. The SCAN icon will be ashing indicating that the target object
temperature is being measured.
Releasing the trigger, the SCAN icon disappears and the HOLD icon appears, indicating that the measurement has
stopped and the last measured value is kept.
Short press MODE button to change MAX/MIN/AVG/DIF modes respectively, the temperature value of the
corresponding modes are shown in the secondary display area (as shown below).
Short press SET button to switch to HIGH alarm ON/OFF setup (as shown below), press LOG or MODE button to switch
between ON/OFF.
Thermometer will exit the setup after 5 seconds without any operation.
When HIGH alarm is ON, HI symbol and red LED will ash when temperature exceeds the high alarm limit.
HIGH Alarm Limit Setup
Short press SET button to switch to HIGH alarm limit setup (as shown below), use functional buttons to set values.
Short press LOG or MODE button to add or subtract 1 every time. Long press LOG or MODE button to add or subtract
10 every second.
Thermometer will exit the limit setup after 5 seconds without any operation.
LOW Alarm ON/OFF
Short press SET button to switch to LOW alarm ON/OFF setup (as shown below), press LOG or MODE button to switch
between ON/OFF. Thermometer will exit the setup after 5 seconds without any operation.
When LOW alarm is ON, LO symbol and blue LED will ash when temperature is lower than the low alarm limit.
LOW Alarm Limit Setup
Short press SET button to switch to LOW alarm limit setup (as shown below), press the functional buttons to set values.
Short press LOG or MODE button to add or subtract 1 every time. Long press LOG or MODE button to add or subtract
10 every second. Thermometer will exit the limit setup after 5 seconds without any operation.
Emissivity Setup
Emissivity can be adjusted from 0.1 to 1.0. Short press SET button to enter the emissivity setup interface (as shown below).
Press LOG or MODE button to set the values. Short press LOG or MODE button to add or subtract 0.01 every time, long
press LOG or MODE button to add or subtract 0.1 every second. Thermometer will exit the setup after 5 seconds without any
operation.
Unit Setup
Short press SET button to switch to the unit setup interface (as shown in the following gure), press LOG or MODE
button to change °C and °F units. Thermometer will exit the setup if there is no operation for 5 seconds.
Laser ON/OFF
Short press SET button to turn the laser on or off setup interface (as shown below), press LOG or MODE button to tum
on or off lasers. Thermometer will exit the setup if there is no operation for 5 seconds.
Lock Measurement ON/OFF
Short press SET button to switch to lock measurement ON/OFF setup interface (as shown below), press LOG or MODE
button to tum on/off the lock measurement. Thermometer will exit the setup if there is no operation for 5 seconds.
Enter/Exit Data Storage Mode
In the HOLD state of normal measurement mode, short press LOG button to enter the data storage mode, then press
LOG/MODE to select the data group to be viewed (up to 99 groups). ‘- - - -’ indicates that no data has been saved in the
group. Long press LOG for 3s to return to normal measurement mode.
During lock measurement, pull the trigger to enable function. The icon will appear on the thermometer screen
and the SCAN icon will ash. Thermometer keeps continuously measuring the target temperature.
Pulling the trigger again, the and SCAN icons will disappear, and the HOLD icon will appear. Thermometer stops
measurement and keeps the last measured value.
Power off
without
operation for 8s
1.
2.
1.
2.
1.
2.
Long press
LOG for 3s.
JT2005
Infrared Thermometer
Operation Manual
Data Storage
In data storage mode (with new data in HOLD state), press SET, data ashes 3 times and is saved in current data
group, then the screen will display the data of next group. If no data has been saved in the group, ‘- - - -’ appears. You
can short press MODE to return to view the previous stored data.
Delete Data
In data storage mode, long press SET for 5s to delete all data (99 groups).
Scheduled Measurement
Enable this function to measure at a preset time (in 24 hours format). The thermometer will turn on automatically to
perform the measurement and save the record at preset time.
General measurement mode: Long press MODE for 3s to enter the scheduled measurement ON/OFF setup interface (as
shown below), use LOG or MODE button to switch between ON/OFF. Thermometer will exit the setup after 5 seconds of
no operation.
Scheduled Measurement Time Setup
In the scheduled measurement ON/OFF setup interface, short press SET to enter the scheduled measurement time setup
interface (as shown below), press LOG/MODE to set the hour, then short press SET and use LOG/MODE to set the minutes.
Monitoring Measurement
Enable this function to setup the monitoring measurement at a preset interval (1 min-24h). The Thermometer will
automatically turn on to measure and record a measurement at every interval.
In the scheduled measurement time setup interface, short press SET to enter the monitoring measurement setup
interface (as shown below), press LOG or MODE button to switch between ON/OFF. Thermometer will exit the setup
after 5 seconds without any operation.
Monitoring Measurement Time Setup
In the monitoring measurement ON/OFF setup interface, short press SET to enter the monitoring measurement time
setup interface (as shown below), press LOG/MODE to set the hour, then short press SET and press LOG/MODE to set
the minutes.
Protection Function
Without protection function, the thermometer will always be on during locked measurement mode, even when
trigger is enabled by accident. When protection function is enabled, the thermometer will stop the measurement and
shut down when there is no button operation for 10 minutes.
In the monitoring measurement lime setup interface, short press SET to enter the protection mode ON/OFF setup
interface (as shown below), use LOG or MODE button to switch between ON/OFF. Thermometer will exit the setup
after 5 seconds without any operation.
System Time Setup
Please set the system time before the scheduled measurement and monitoring measurement. This thermometer
clock is displayed in 24-hour time format.
In the protection mode ON/OFF setup interface, short press SET to enter the system time setup interface (as shown
below), press LOG/MODE to increase/decrease the relevant value, and short press SET to set the year-month-date-
hour-minute accordingly.
Thermometer will exit the setup after 5 seconds of no operation.
Notes:
Enter the scheduled measurement/monitoring measurement/protection function/system time setting modes
The records will be saved from the 000 position when they are stored in memory. After all 99 positions are
occupied, the recording will return to 000 again and overwrite the original data.
When this function is turned on and the thermometer is in the SCAN or HOLD states, “Auto” or “Interval” will be
displayed.
When the thermometer restarts, the system time and the measurement settings will be restored to the default
values (it needs to be reset), but the recording memory will be still saved.
It is not recommended to enable the scheduled measurement and monitoring measurement at the same time, as
their measurement records all start from 000, and will overwrite the measurement data of each other.
In the HOLD state, press MODE button for more than 3s to enter the scheduled measurement mode; then press SET
to enter the following
setting interface:
1.
2.
3.
4.
In HOLD state, press MODE (>3s)
Scheduled measurement on/off (“Auto” and “LOG” blue characters appear)
Set the hour of scheduled measurement (hour characters ash)
Set the minutes of scheduled measurement (minute characters ash)
Monitoring measurement on/off (“Interval” and “LOG” blue characters appear)
Set the hour of the interval in monitoring measurement (hour characters ash)
Set the minutes of the interval in monitoring measurement (minute characters ash)
Protection function on/off (“Protect” blue characters appear)
Set the year of the system date (year characters ash)
Set the month of the system date (month characters ash)
Set the date of the system date (date characters ash)
Set the hour of the system time (hour characters ash)
Set the minutes of the system time (minute characters ash)
Save and exit the setup mode
Press SET
Finding Hot Point and Cold Point
Aim at target area with thermometer, then
move up and down slowly to sweep the whole
area until the hot point and cold point are
found.
D:S Ratio (Distance to spot ratio)
S increases as D increases (S represents 90% of energy in the
circle). The maximum D:S can be obtained when D=800mm
(32”) and S=40mm (1.6”).
Field of View
Ensure that the target is larger than S. The smaller the target
is, the closer the measurement distance should be. Optimum
result is obtained when diameter of the target is more than
2.0 times of S. The spot diameter is approximately equal to the
distance between the two laser points.
Emissivity
Emissivity characterization reects the radiated energy by the material. Emissivity for most organic materials, paints or
oxidized surfaces are about 0.95. Total emissivity of selected metals and non-metals are listed in the following table.
Maintenance
Clean
Use clean compressed air to blow away falling particles.
Use a wet cotton swab to carefully wipe lens surface.
Use a wet sponge or a soft cloth to clean product exterior.
Battery Replacement
Install or replace 1604A 9V battery according to the picture on the right.
Metal
Ceramic 0.95
Clay 0.95
Concrete 0.95
Cloth 0.9
Plates 0.96
Plaster 0.8 - 0.95
Ice 0.98
Limestone 0.98
Paper 0.95
Plastics 0.95
Water 0.93
Soil 0.9 - 0.98
Wood 0.9 - 0.95
Aluminum
Oxidization 0.2 - 0.4
Hastelloy
Alloy 0.3 - 0.8
Iron (Forging)
Passivation 0.9
Molybdenum
Oxidization 0.2 - 0.6
Nickel
Oxidization 0.2 - 0.5
Platinum
Black 0.9
Zinc
Oxidization 0.1
A3003 Alloy
Oxidization
Rough
0.3
0.1 - 0.3
Brass
Burnishing
Oxidization
0.3
0.5
Inconel
Oxidization
Sand-Blasting
Electro Burnishing
0.7 - 0.95
0.3 - 0.6
0.15
Iron (Casting)
Oxidization
Non-Oxidization
Casting
0.6 - 0.95
0.2
0.2 - 0.3
Steel
Cold Rolling
Steel Plate Rubbing
Steel Plate Burnishing
0.7 - 0.9
0.4 - 0.6
0.1
Non-Metal
Asbestos
Asphalt
Basalt
0.95
0.95
0.7
Glass
Convex Glass
Smooth Glass
Lead-Boron Glass
0.76 - 0.8
0.92 - 0.94
0.78 - 0.82
Copper
Oxidization
Electric Terminal Board
0.4 - 0.8
0.6
Iron
Oxidization
Rusting
0.5 - 0.9
0.5 - 0.7
Lead
Rough
Oxidization
0.4
0.2 - 0.6
Measured Surfaces Emissivity
Long press
MODE for 3s.
Long press
SET for 5s.
