Hadex MS6531B User manual

Instruction Manual
MS6531B
Please read carefully before operating and keep this manual for
reference.

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Contents
1. Introduction....................................................................2
2. Features.........................................................................2
3. Uses...............................................................................3
4. Safety Information .........................................................3
5. Distance to Spot Ratio...................................................4
6. Technical Specifications................................................5
7. Buttons and Components..............................................7
8. Display Description........................................................8
9. Operating Instructions ...................................................9
10. Additional Notes ........................................................13
11. Accessories and Table of Emissivity.........................15

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1. Introduction
Thank you for purchasing our infrared thermometer. This product is a
professional, hand-held meter for non-contact infrared t is simple to use,
highly accurate, and with a wide temperature range.
2. Features
Fast measurement
Non-contact infrared measurement
Built-in dual laser sight for faster and more accurate targeting
Adjustable Emissivity: 0.1 to 1.0 range for multiple surface types
Temp. unit conversion, maximum, minimum, average, difference
displays
Resolution: 0.1°C (0.1°F)
High/low temperature alarm settings
Automatic range, data hold, and auto power functions

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3. Uses
This product is widely used in food services, security, fire prevention,
chemical, storage, and transport industries
4. Safety Information
When laser beam is active, use with caution
DO NOT aim laser beam at a person’s/animal’s eyes
DO NOT use the laser beam near explosive gas

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5. Distance to Spot Ratio
The distance to spot ratio (D:S) for this meter is: 12:1.
Example: Measurement from a distance of 300mm away will produce a
measurement spot of approx. 25mm in diameter. Figure 1 shows a
diagram of how distance to spot ratio works.
Figure 1

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6. Technical Specifications
Model
MS6531B
Range
IR: -40~800°C/-40~1472°F
Accuracy
IR: -40~0°C/-58~32°F: ±4°C/7.2°F
IR: 0~400°C/32~752°F: ±1.5%, ±2°C/3.6°F
IR: 400~800°C/752~1472°F: ±2%, ±2°C/3.6°F
D:S
12:1
Emissivity
Adjustable: 0.10~1.0
Resolution
0.1°C(0.1°F)<199.9, 1°C(1°F)>199.9
Response Time
<500ms
Spectral Response
8~14µm
Low/High Alarm
Low
High
Polarity Display
Automatic (no
indication for positive
“-“ indicates negative
Laser Pointers
Output: <1mW, 630~670nm, class 2 (II) laser
Auto Power Off
IRT will turn off after 30s of non-use
Operating
Temperature
0°C~50°C/32°F~122°F
Storage Temperature
-20°C~60°C/-4°F~140°F
Relative Humidity
Operating: 10~90% RH, Storage: <80% RH
Battery
9V battery
Weight
250g
Dimensions
95x83x192mm
Safety
Compliance with European CE safety standards

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Note:
Calibration is carried out at a temperature between 18°C and 28
°C (64°F to 82°F) and relative humidity below 80%.
Make sure that the target is larger than the meter’s visual spot
size. The smaller the target, the closer the meter should be.

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7. Buttons and Components
1：Laser Sight:2：Infrared Sensor
3：Measurement Trigger:4：Battery Cover
6：Mode Button:7：Laser/Backlight Button:8：Temp. Unit
Button:9：LCD Display

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8. Display Description
1. Display Hold
2. Main Measurement
Display
3. Mode
4. Secondary Measurement
Display
5. Fahrenheit
6. Celsius
7. Low Battery
8. Low Alarm Indication
9. High Alarm indication
10. Buzzer Indication
11. Measurement Indication
12. Measurement Lock
13. Laser Pointers On/Off

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9. Operating Instructions
9.1 Measurement
1. Point the meter at the object to be measured.
2. Hold down the trigger to begin measurement. The “ ” symbol
flashes on the top of the display to indicate measurement is
taking place.
3. The main measurement display show the current temperature
reading of the measured surface.
4. Release the trigger and “HOLD” symbol will appear in the upper
left corner and the display will hold the last reading.
5. The meter’s auto off function will turn off the meter 30s after
releasing the trigger.
Note:
- Environmental temperature can affect the accuracy of the reading.
It is recommended the meter be placed in the measurement
environment for 30 min. prior to taking measurement.
- Laser can be turned off for measurements at close range to
conserve battery power.
9.2 Settings
Emissivity: default emissivity is 0.95
To change emissivity: press “MODE” until the bottom left shows the “E”
symbol with two arrows pointing up and down. Press the up and down
buttons to adjust the emissivity. Emissivity range: 0.1-1.0.
To show the maximum recorded value: press “MODE” until “MAX”
appears on the bottom left corner of the display.
To show the minimum recorded value: press “MODE” until “MIN” appears
on the bottom left corner of the display.

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To show the difference between the minimum and maximum values: press
“MODE” until “dIF” appears on the bottom left corner of the display.
To show the average recorded value: press “MODE” until “AVG” appears
on the bottom left corner of the display.
To set the high alarm level: press “MODE” until “HAL” appears on the
bottom left corner of the display. Press the up and down buttons to set
the alarm level.
To set the low alarm level: press “MODE” until “LAL” appears on the
bottom left corner of the display. Press the up and down buttons to set
the alarm level.
When the high and low alarms are set, the meter will beep if the
temperature measured is above the high level or below the low level. In
addition, the main display will show “Hi” or “Lo” and the icon in the top
right corner will turn red or blue to indicate high or low alarm respectively.
To turn on/off the laser pointers: during measurement, press the down
button to switch between the laser pointers on or off.
To turn on/off the backlight: during measurement, press the up button to
turn on or off the backlight.
To switch between °C and °F: while in HOLD mode, press the down arrow
to switch temperature units.
To lock the thermometer into measurement: While in HOLD mode, press
the up button and the thermometer will begin measuring and continue to
measure until the up button is pressed again.

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9.3 Battery Replacement
When the battery is running low, the symbol will appear indicating
the battery needs to be replaced. Open the battery cove and replace the
old battery with a new 9V battery.

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10. Additional Notes
10.1 Thermometer
Infrared thermometers are used to measure surface temperature.
The sensor collects infrared energy and is gathered in the
detector circuit and converted into a temperature reading for
display.
The laser pointers are only used for aiming purposes
10.2 Surfaces
Make sure the object to be measured is larger than the diameter
of the thermometer’s spot field.
The smaller the target, the closer the meter should be.
10.3 Distance to Spot Size
As the distance between the surface to be measured and the
meter increases, the spot increases by the ratio of 12:1.
10.4 Hotspot positioning
To find a hotspot, aim the thermometer outside the area to be
measured and then move it around within the correct area to find
the hotspots.
10.5 Tips
Not recommended for measuring on light metal or smooth metal
surfaces such as stainless steel, aluminum, etc.
Sensor cannot penetrate through transparent surfaces such as
glass.
Steam, dust, smoke, etc. block the sensor from picking up
infrared energy, thus decreasing it’s accuracy.

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10.6 Warranty
Clean the meter regularly with a dry cotton cloth. DO NOT use
any type of chemicals or detergents.
Maintenance and repairs should only be done by qualified
personnel.
DO NOT immerse the thermometer in water.
DO NOT store the thermometer in an area with high temperature
or high humidity.
10.7 Emissivity
Emissivity characterizes the type material and the amount of
radiant energy given off by the material. Most organic materials
and painted/oxidized surfaces have an emissivity of 0.95.

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11. Accessories and Table of Emissivity
11.1 Accessories
Instruction Manual
Warranty Card
9V Battery
Type-K Thermocouple
Hook
11.2 Table of Emissivity
Material
Emissivity
Material
Emissivity
Aluminum
0.30
Glass
0.90 to 0.95
Asphalt
0.95
Iron Oxides
0.78 to 0.82
Concrete
0.95
Paint
0.80 to 0.95
Asbestos
0.95
Plastic
0.85 to 0.95
Ceramics
0.95
Paper
0.70 to 0.94
Brass
0.50
Plaster
0.80 to 0.90
Brick
0.90
Rubber
0.95
Carbon
0.85
Wood
0.90
Sludge
0.94
Textile
0.94
Frozen Food
0.90
Lead
0.50
Hot Food
0.93
Marble
0.94
Ice
0.98
Cloth (black)
0.98
Snow
0.90
Sand
0.90
Human Skin
0.98
Water
0.93