protech QM7430 User manual

Professional Non-Contact
Thermometer
QM7430
User Manual

QM7430 - User Manual
Contents
1.Introduction ..............................................................................................
2.Features......................................................................................................
3.Wide Range Application.............................................................................
4.Safety.........................................................................................................
5.Distance & Spot Size..................................................................................
6.Specifications.............................................................................................
7.Frontpanel Description...............................................................................
8.Indicator.....................................................................................................
9.Buttons......................................................................................................
10.Functional Design.....................................................................................
11.Measurement Operation...........................................................................
12.Battery Replacement.................................................................................
13.Notes........................................................................................................
14.Maintenance.............................................................................................
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QM7430 - User Manual
1.Introduction
Thank you for purchase of the IR Thermometer. This is capable of non-contact
(infrared) temperature measurements at the touch of a button. The built-in laser
pointer increases target accuracy while the backlight LCD and handy push-buttons
combine for convenient, ergonomic operation.
The Non-contact Infrared Thermometers can be used to measure the temperature
of objects’ surface that is improper to be measured by traditional (contact)
thermometer (such as moving object, the surface with electricity current or the
objects which are uneasy to be touched.)
Proper use and care of this meter will provide years of reliable service.
2.Features
•Rapid detection function
•Precise non-contact measurements
•Dual laser sighting
•Unique flat surface, modern housing design
•Automatic Data Hold
•Emissivity Digitally adjustable from 0.10 to 1.0
•MAX MIN AVG DIF temperature displays
•Backlight LCD display
•Automatic selection range and Display Resolution 0.1ºC(0.1ºF)
•Trigger lock
•Set high and low alarm
•Transmit data to pc with USB.
3.Wide Range Application
Food preparation, Safety and Fire inspectors, Plastic molding, Asphalt, Marine and
Screen printing, measure ink and Dryer temperature, HVAC/R, Diesel and Fleet
maintenance.

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QM7430 - User Manual
4. Safety
•Use extreme caution when the laser beam is turned on.
•Do not let the beam enter your eye, another person’s eye or the eye of an animal.
•Be careful no to let the beam on a reflective surface strike your eye.
•Do not allow the laser light beam impinge on any gas which can explode.
5.Distance & Spot Size
As the distance (D) from the object increases, the spot size (S) of the area measured
by the unit becomes larger. The relationship between distance and spot size for each
unit is listed below. The focal point for each unit is 914mm (36”). The spot sizes
indicate 90% encircled energy.

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QM7430 - User Manual
6.Specifications
Response Time:
Spectral Response:
Emissivity:
Over Range Indication:
Polarity:
Diode Laser:
Operating Temp:
Storage Temp:
Relative Humidity:
Power Supply:
Safety:
Note:
Field of View: Make sure that the target is larger than the unit’s spot size. The smaller
the target, the closer you should be to it. When accuracy is critical, make sure the
target is at least twice as large as the spot size.
150ms
8~14um
Digitally adjustable from 0.10 to 1.0
LCD will show “----”
Automatic (no indication for positive polarity);
Minus (-) sign for negative polarity
Output <1mW, Wavelength 630~670nm,
Class 2 laser product
0 to 50°C(32 to 122°F)
-10 to 60°C (14 to 140°F)
10%~90%RH operating, <80%RH storage
9V battery, NEDA 1604A or IEC 6LR61, or equivalent
“CE” Comply with EMC
IR Measurement
IR Temp. Range
Optical Resolution
Resolution
Accuracy
Repeatability
TK Measurement
TK Temp. Range
Resolution
Accuracy
Repeatability
-50 to 1650°C (-58 to 3002°F)
30:1
0.1°C(0.1°F)<1000; 1°C(1°F)>1000
-50 to 20°C(-58 to 68°F)
20 to 500°C(68 to 932°F)
500 to 1000°C(932 to 1832°F)
1000 to 1650°C(1832 to 3002°F)
-50 to 20°C(-58 to 68°F)
20 to 1650°C(68 to 3002°F)
-50 to 1370°C(-58 to 2498°F)
0.1°C(0.1°F)<1000; 1°C(1°F)>1000
-50 to 1000°C(-58 to 1832°F)
1000 to 1370°C(1832 to 2498°F)
-50 to 1370°C(-58 to 2498°F)
±3°C(5.4°F)
±1.0% ±1.0°C(1.8°F)
±1.5%
±2.0%
±1.5°C(2.7°F)
±0.5% or ±0.5°C(0.9°F)
±1.5% ±3°C(5°F)
±1.5% ±2°C(3.6°F)
±1.5%

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QM7430 - User Manual
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7.Front Panel Description
1-IR Sensor
2-LCD Display
3-Type K in
4-USB in
5-Light/Laser Button
6-Up Button
7-Down Button
8-Mode Button
9-Measurement Trigger
10-Battery Cover
11-Handle Grip
8.Indicator
1-Measuring Indication
2-Data Hold
3-Laser ”ON” Symbols
4-Lock Symbol
5-High Alarm and Low Alarm Symbol
6-Max, Min, Avg, Dif Symbol
7-Current Temperature Value
8-Temperature Values for the
Max, Min, Dif, Avg
9-Emissivity Symbol
10-Type K Symbol
11-Emissivity Value and Type K Value
12-Low Power Symbols
13-°C/°F Symbol
14-Data Logger Symbol
15-USB Symbol(Transmit Data to PC)
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QM7430 - User Manual
9.Buttons
1-Laser/Backlight ON/OFF Button
2-Up Button (for EMS,HAL,LAL)
3-Down Button (for EMS,HAL,LAL)
4-Mode Button
(for cycling through the mode loop)
10.Functional Design
•In the measuring time, pressing “MODE” keys to display MAX value, MIN value,
DIF value , AVG value, LOG value.
•In the measuring time, if the TYPE-K thermocouple is not connected, you can
adjust EMS by pressing “Up/Down” key.
•In the HOLD mode, you can adjust °C/°F by pressing “Up/Down” key.
•You can turn on/off the backlight/laser by pressing “Light/Laser” key at any state.
•To set values for the High Alarm (HAL), Low Alarm (LAL) and Emissivity (EMS), press
the “MODE” button until the appropriate code appears in the display, press the
“Up/Down” buttons to adjust the desired values.
MODE Button Function
•In the “HOLD“ mode, Press the “MODE” button also
allows you to access the set state, MAX MIN DIF
AVG LOG display.
•Emissivity(EMS), Lock On/Off, HAL On/Off, HAL
adjustment, LOW On/Off, LOW adjustment, °C/°F
Each time you press set you advance through the
mode cycle. The diagram shows the sequence of
functions in the mode cycle.
MAX MIN DIF AVG Display
MAX=maximum .Maximum value of measurement.
MIN=minimum. Minimum value of measurement.
DIF=difference. Difference value of measurement.
AVG=average. Average value of measurement.
Adjustable display by pressing “Up/Down“ button.
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1
4
3
MODE
MAX MIN DIF AVG
EMS adjustment
LOCK on/off
HAL on/off
HAL adjustment
LOW on/off
LOW adjustment
°C/°F

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QM7430 - User Manual
USB Function
•This device affords transmitting the IR and Type K measurement data to the PC
via USB.
•Turn on or Shut off USB function:
•Under MAX/MIN/DIF/AVG state, press “LIGHT/LASER“ button until “USB” sign
appears in the right lower corner of the LCD. the USB function turn on.
•Then, press the “LIGHT/LASER“ button again until “USB” sign disappears. Thus
the USB function shut off.
•Please refer to the help file in software for details.
EMS Adjustment
The Emissivity(EMS) digitally adjustable from 0.10 to 1.0 by pressing “Up/Down“
button.
LOCK on/off
The lock mode is particularly useful for continuous monitoring of temperatures.
Press the “Up/Down“ button to turn on or off. Press the Measurement Trigger to
confirm the lock measurement mode. The IR Thermometer will continuously display
the temperaure until press again the Measurement Trigger.
HAL on/off
HAL= High alarm
Turn on or off high alarm by pressing “Up/Down“ button.
HAL adjustment
High alarm value adjust.
Please adjust high alarm value by pressing “Up/Down“ button
LAL on/off
LAL= Low alarm
Turn on or off low alarm by pressing “Up/Down“ button.
LAL adjustment
Low alarm value adjust.
Please adjust low alarm value by pressing “Up/Down“ button
°C/°F
Pressing “Up/Down“ button to change the temperature unit (°C or °F)

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QM7430 - User Manual
11.Measurement Operation
11-1.Hold the meter by its Handle Grip and point it toward the surface to be measured.
11-2.Pull and hold the Trigger to turn the meter on and begin testing. The display
will light if the battery is good. Replace the battery if the display does not light.
11-3.Release the Trigger and the HOLD display icon will appear on the LCD indicating
that the reading is being held. In HOLD status, press the “Up” button to turn
on or off the laser. And press the “Down” button to turn on or off the backlight.
11-4.The meter will automatically power down after approximately 7 seconds after
the trigger is released.(Unless the unit is locked on)
Note: Measurement considerations
•Holding the meter by its handle, point the IR Sensor toward the object whose
temperature is to be measured. The meter automatically compensates for
temperature deviations from ambient temperature. Keep in mind that it will take
up to 30 minutes to adjust to wide ambient temperatures are to be measured
followed by high temperature measurements, some time (several minutes) is
required after the low (and before the high) temperature measurements are made.
•This is a result of the cooling process, which must take place for the IR sensor.
12.Battery Replacement
12-1.As battery power is not
sufficient, LCD will display
“ ” replacement with one
new battery type 9V is
required.
12-2.Open battery cover, then
take out the battery from
instrument and replace with
a new 9-Volt battery and
place the battery cover back.
Low battery
indicator
9V Battery
Open the
battery cover
Push this button

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QM7430 - User Manual
13.Notes
•How it Works
Infrared thermometers measure the surface temperature of an object. The unit’s
optics sense emitted, reflected, and transmitted energy, which is collected and
focused onto a detector. The unit’s electronics translate the information into a
temperature reading, which is display on the unit. In units with a laser, the laser
is used for aiming purposes only.
•Field of View
Make sure that the target is larger than the unit’s spot size. The smaller the target,
the closer you should be to it. When accuracy is critical, make sure the target is at
least twice as large as the spot size.
•Distance & Spot Size
As the distance (D) from the object increases, the spot size (S) of the area measured
by the unit becomes larger.
•Locating a hot Spot
To find a hot spot aim the thermometer outside the area of interest, then scan across
with an up and down motion until you locate hot spot.
•Reminders
Not recommended for use in measuring shiny or polished metal surfaces ( stainless
steel, aluminum, etc.).See Emissivity
The unit cannot measure through transparent surfaces such as glass. It will measure
the surface temperature of the glass instead.
Steam, dust, smoke, etc., Can prevent accurate measurement by obstructing the
unit’s optics.
•Emissivity
Emissivity is a term used to describe the energy-emitting characteristics of materials.
Most (90% of typical applications) organic materials and painted or oxidized surfaces
have an emissivity of 0.95 (pre-set in the unit). Inaccurate readings will result from
measuring shiny or polished metal surfaces. To compensate, cove the surface to be
measured with masking tape or flat black paint. Allow time for the tape to reach
the same temperature as the material underneath it. Measure the temperature of
the tape or painted surface.

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QM7430 - User Manual
Thermal Emissivity
0.98
0.98
0.75 to 0.80
0.96
0.80 to 0.95
0.97
0.94
0.85 to 0.95
0.90
0.70 to 0.94
0.81
0.78
0.78 to 0.82
0.90
Substance
Asphalt
Concrete
Cement
Sand
Earth
Water
Ice
Snow
Glass
Ceramic
Marble
Plaster
Mortar
Brick
Thermal Emissivity
0.90 to 0.98
0.94
0.96
0.90
0.92 to 0.96
0.92 to 0.96
0.96 to 0.98
0.83
0.90 to 0.95
0.90 to 0.94
0.94
0.80 to 0.90
0.89 to 0.91
0.93 to 0.96
Substance
Cloth (black)
Human skin
Lather
Charcoal (powder)
Lacquer
Lacquer (matt)
Rubber (black)
Plastic
Timber
Paper
Chromium oxides
Copper oxides
Iron oxides
Textiles
•Emissivity Values
14.Maintenance
•Repairs or service are not covered in this manual and should only be carried out
by qualified trained technician.
•Periodically, wipe the body with a dry cloth. Do not use abrasives or solvents on
this instrument.
•For service, use only manufacturer’s specified parts.

QM7430 - User Manual