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Digital Temperature, Humidity
and Dew Point Multimeter
OPERATING MANUAL
Functions
•
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((++1144 ttoo ++112222°°FF))..
•
HHuummiiddiittyy tteesstteerr ffrroomm 00 ~~ 110000%%RRHH..
•
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AAuuttoo ppoowweerr ‘‘ooffff ’’..
•
CCoommpplleettee wwiitthh mmeetteerr hheeaadd ccoovveerr,, wwrriisstt
ssttrraapp aanndd hhaarrdd ccaarrrryy ccaassee..
ORDER CODE: EDI-312-4040K
MODEL THM150
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Content
1. GENERAL INSTRUCTIONS ......................................................................................3
2. TECHNICAL SPECIFICATIONS ..................................................................................3
3. DESCRIPTION ..........................................................................................................4
4. OPERATION INSTRUCTIONS ................................................................................5-6
5. MAINTENANCE ........................................................................................................6
6. PACK CONTENT........................................................................................................7
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Digital Temperature/Humidity and Dew Point Multimeter
1. GENERAL INSTRUCTIONS
Thank you for purchasing the Edison Temperature/Humidity and Dew Point
Multimeter. To get the best service from this instrument, read carefully this user
manual and respect the detailed safety precautions.
The meter is a temperature and humidity measuring instrument, used to measure
the humidity and temperature in offices, storeroom’s, buildings, greenhouses and
places where a controlled environment is essential.
1.1. Precautionary safety measures
To get the best service from this meter, please read this manual carefully.
1.2. During use
• DO NOT touch the humidity sensor.
• DO NOT expose the sensor to direct light, this causes a false reading.
• NEVER store the product together with solvents, acids or other aggressive
substances.
1.3. Maintaining the product
• DO NOT use in high temperature environments.
• When not using the instrument for a long time, please remove the batteries
and avoid storing in high temperature and high humidity.
2.
TECHNICAL SPECIFICATIONS
Display: 4 digit LCD Display.
Parameters: °C, °F, %RH (relative humidity), td (dew point temperature).
Resolution: 0.1°C, 0.1°F, 0.1%RH.
Range: -10 ~ +50°C, +14 ~ +122°F, 0 ~ +100%RH.
Accuracy: ±1.0°C,
±1.8°F,
±3%RH (5~95%RH).
Sample rate: 1 time /sec.
Auto power ‘OFF’: Approx. 20 minutes.
Operating environment: -10 ~ +50°C, +14 ~ +122°F.
Storage environment: -20 ~ +60°C, -4 ~ +140°F
Dimension: 30(H) x 60(W) x 121(L)mm
Weight: 140g
Accessories: DC1.5V (AAA) ............................x 3
Strap ..........................................x 1
Users manual .......................... x 1
Hard carry case ........................x 1
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3. DESCRIPTION
3.1. Instrument Familiarisation
11..
Sensor cover.
22..
Sensor.
33..
LCD display.
44..
Unit key.
55
. On/Off key.
66..
Mode key.
77..
Hold
Light
3.2. LCD Display
SYMBOL FUNCTION DESCRIPTION
Indicates it is now in the data-holding state
Indicates back light is on
Measure values: Humidity/Due Point. Temperature.
Indicating the value being the minimum/maximum value.
Humidity / Dew Point units
Temperature units
Indicates low voltage of the batteries
H
MAX MIN
td
°C°F
%RH
°C°F
3
4
5
8
7
2
1
6
9
8 9
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Digital Temperature/Humidity and Dew Point Multimeter
4. Operation Instruction
**NNOOTTEE::
In order to ensure the accuracy of the measurement readings, all the
interference sources which may affect the measurement results about
temperature and humidity (such as the hand) must be clear from the sensor.
4.1. ON/OFF
1. First remove the meters protective sensor cover.
2. Press the
OONN//OOFFFF
key to turn the power ‘ON’.
3. The LCD will display the current value of humidity and temperature.
Default setting is %RH/°C (humidity/temperature).
4. To turn the meter ‘off ’ press the
OONN//OOFFFF
key for 2 seconds.
NNoottee::
The power to the meter will switch off automatically after 20 minutes but be
aware that leaving the meter in for any length of time will drain the battery.
4.2. UNIT
1. When the meter is switched ‘on’ p
ress the
UUNNIITT
key to change through the
4 different humidity/temperature
measurement options.
2. The available setting are as follows:
%RH/°C, td°C/°C , %RH/°F, td°C/°F
(%RH = Relative humidity / td°C = Dew-point temperature)
4.3. MODE
1. When the meter is switched ‘on’ and the required ‘UNIT’ (%RH/°C, td°C/°C ,
%RH/°F, td°C/°) has been selected press the
MMOODDEE
key to display the
Maximum or Minimum readings, this is acknowledged with the symbol MAX
or MIN on the LCD display.
2. To cancel the Maximum or Minimum readings press the
MMOODDEE
key until the
symbols no longer appear on the LCD Screen.
4.4. HOLD/LIGHT
HOLD
1. Press the key to freeze the reading shown, the LCD will display the
symbol.
2. Press the key once more to cancel the hold function.
The symbol will disappear
NNOOTTEE::
As a safety feature, the meter will not turn ‘off’ if the
HHOOLLDD
function is
activated.
H
H
HHOOLLDD
LLIIGGHHTT
HHOOLLDD
LLIIGGHHTT
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LIGHT
1. When the meter is switched ‘on’ press the key for 2 seconds. The
back-light will be turned ‘on’ and the icon will display on the LCD.
2. To turn the back-light ‘off ’ press the key again for 2 seconds, the
icon will also disappear.
4.5. Auto power off setting
When the meter is powered on, it is under auto power off mode. This means the
meter will power itself ‘off‘ after 20 minutes if no keys are operated.
To override the auto power off mode:
1. When the meter is ‘off’ press the key and hold down while also
pressing the
OONN//OOFFFF
key. The LCD will display ‘AP OFF’.
2. Press the key again to confirm the setting and turn on the meter. The
auto power off mode is now activated.
3. The meter will now have to be turned off manually for the auto power off
function to be restored.
5. Maintenance
5.1. CLEANING INSTRUCTIONS
The meter may be wiped down with a damp (not wet) sponge or cloth using a mild
water based detergent or anti-bacterial soap and rinsed under a gentle stream of
cold water.
NOTE: This unit is not designed for complete submersion or washing in water.
5.2. BATTERY REPLACEMENT
Use the following procedure:
When the battery voltage drops below the required operation range the
symbol will appear on the LCD display and the batteries need to be replaced.
1. On the back of the meter, slide the battery cover in the direction of the
arrowhead to open the battery cover.
2. Replace the batteries with 3 new 1.5V batteries (AAA).
3. Replace the battery cover.
HHOOLLDD
LLIIGGHHTT
HHOOLLDD
LLIIGGHHTT
HHOOLLDD
LLIIGGHHTT
HHOOLLDD
LLIIGGHHTT
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Digital Temperature/Humidity and Dew Point Multimeter
6.
PACK CONTENTS
• Digital multimeter
• Wrist strap
• Instruction manual
• DC1.5V x3 AAA batteries (installed)
• Carry Case
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Edison Products are continuously being developed and improved.
All details and illustrations are for guidance and may be subject to change.
EDISON
The Power Factory, PO Box 14, Wigston, Leicester, England.
ISO 9001 Registered Company
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