MARTINDALE DH85 User manual

DH85
HYGRO-MOISTURE METER
Instruction
Manual
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ALWAYS READ THESE INSTRUCTIONS BEFORE PROCEEDING
Thank you for buying one of our products. For safety and a full
understanding of its benefits please read this manual before use.
Technical support is available from 01923 441717 and
[e-mail].
CONTENTS
1 Safety Information 1
1.1 Meaning of Symbols and Markings 1
1.2 Precautions 2
2 Introduction 3
2.1 Inspection 3
2.2 Description 3
2.3 Accessories 3
2.4 Battery Installation 3
3 Operation 4
3.1 Low Battery Indication 4
3.2 Description of Press Buttons 4
3.3 Description of LCD Symbols 4
3.4 Power On/Off 5
3.5 Auto Power Off 5
3.6 Backlight 5
3.7 Set Mode 6
3.8 Test Function 7
3.9 Measurement Mode 7
3.10 Hold Mode 7
3.11 Measurement Considerations 8
4 Maintenance 9
4.1 Battery Replacement 9
4.2 Calibration 9
4.3 Cleaning 10
4.4 Repair & Service 10
4.5 Storage Conditions 10
5. Warranty 11
Specifications
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1
1 SAFETY INFORMATION
REMEMBER: SAFETY IS NO ACCIDENT
These instructions contain both information and warnings that are
necessary for the safe operation and maintenance of this product. It
is recommended that you read the instructions carefully and ensure
that the contents are fully understood. Failure to understand and to
comply with the warnings and instructions can result in serious injury,
damage or even death.
Particular attention should be paid to the Warnings, Precautions and
Technical Specifications.
Please keep these instructions for future reference. Updated
instructions and product information are available at:
www.martindale-electric.co.uk
1.1 Meaning of Symbols and Markings
Caution - risk of danger and refer to instructions
Caution - risk of electric shock
Equipment complies with relevant EU Directives
End of life disposal of this equipment should be in
accordance with relevant EU Directives.
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1.2 Precautions
This product has been designed with your safety in mind, but please
pay attention to the following warnings and cautions before use.
Warnings
The DH85 must only be used under the conditions and for the
purposes for which it has been constructed and specified.
Never connect the test probes to a live circuit or use the DH85 to test
the insulation of live conductors.
Cautions
Before use check the unit for cracks or any other damage. Make
sure the unit is free from dust, grease and moisture. Do not use if
damaged.
Avoid severe mechanical shock or vibration and extreme temperature.
When not in use, fit the protective cover to avoid the risk of injury from
the test probes.
To avoid possible corrosion from leaking batteries, remove the
batteries if discharged, or when the unit is not in use for an extended
period.
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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the unit
and any accessories for damage. If there is any damage then consult
your distributor immediately.
2.2 Description
The Martindale DH85 has the following measurement functions:
Moisture (measures conductivity in the material under test)
Relative humidity from 0% to 100% R.H.
Dry bulb, dew point and wet bulb temperature from -20°C to 60°C
(-4°F to 140°F)
Further functions and features are:
Max/Min, Average and Hold functions
Auto power off
Low battery indication
LCD display with backlight
Pocket-sized, compact body
2.3 Accessories
The DH85 comes with the following accessories:
Protective cover for safe storage
2 x 1.5V AAA batteries
Detachable carry strap
Instructions
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery installation
instructions for the DH85.
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3. OPERATION
3.1 Low Battery Indication
If the is displayed, the battery needs replacing as measurement
accuracy can no longer be guaranteed (see section 4.1 Battery
Replacement).
3.2 Description of Press Buttons
Selects Set mode settings
Selects moisture range
Selects between R.H., dew point or wet bulb
measurement
Turns on/off the DH85, turns on backlight
MODE Selects Set mode and Hold mode functions
3.3 Description of LCD symbols
Test: Indicates test function is selected
Test: OK Indicates test function passes
wood Indicates a wood range is selected
mortar Indicates a mortar range is selected
WB Indicates wet bulb temperature is being displayed
td Indicates dew point temperature is being displayed
HOLD Hold mode is active
MAX Maximum recorded reading is displayed
MIN Minimum recorded reading is displayed
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MAX-MIN The difference between maximum and minimum
recorded readings is displayed
AVG The average of recorded readings is displayed
°C °F % Units of measurement being displayed
Indicates press of button required
Indicates low batteries
APO Auto power off is active
ENTER Indicates press of MODE button required
3.4 Power On/Off
To power on in Measurement mode, press for less than 1
second.
To power on in Set mode, press for 2 seconds.
To power off the unit, press for 2 seconds.
3.5 Auto Power Off (APO)
If the unit is inactive for a period of 10 minutes it will automatically
power off.
To disable this function refer to section 3.7.
3.6 Backlight
Press for less than 1 second to turn on the backlight.
It will automatically turn off after 15 seconds if there is no further
operation of the unit.
3.7 Set Mode
This mode sets the following in the order shown:
Temperature scale;
Auto power off (APO).
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The Set mode is selected by pressing for 2 seconds with the
unit powered off.
If the unit is switched off while in the Set mode, any changed
settings will not be saved, and the unit will revert to the previous
settings.
Temperature Scale
The LCD will display Set Unit and flash the current temperature
scale after entering the Set mode.
Press to select °C or °F as required.
Press MODE to advance to the next function.
APO
The LCD will display APO
Press to select ON or OFF as required.
Press MODE to advance to the Measurement mode.
3.8 Test Function
While in Measurement mode, scroll through the measurement
ranges with successive presses of the button for < 1 second
until the display flashes Test :.
Press the DH85 test probes onto the test resistor contacts at the top
of the protective cover.
If Test : OK is displayed the unit is ready for use.
If Test : continues to flash clean the test probes and resistor
contacts and repeat the test.
Press to return to the Measurement mode.
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3.9 Measurement Mode
The DH85 has 7 moisture content ranges:
Wood 1 - Hard wood
Wood 2 - Soft wood
Mortar 3 - Plaster
Mortar 4 - Anhydrite screed
Mortar 5 - Cement mortar
Mortar 6 - Lime mortar
Mortar 7 - Bricks
Press for < 1 second until the required measurement range for
the material to be tested is selected.
Lightly press the DH85 test probes into the surface of the material
under test.
The moisture content is displayed on the upper section of the LCD.
The dry bulb temperature is displayed in the lower right section of
the LCD.
The lower left section of the LCD displays relative humidity, dew point
temperature or wet bulb temperature as required.
Press for > 2 seconds to scroll through the following
measurements on the lower left section of the LCD:
relative humidity - the LCD will display %;
dew point temperature - the LCD will display td;
wet bulb temperature - the LCD will display WB.
While in Measurement mode, all measured values are recorded at a
rate of once per second for use by the Hold mode (See section 3.10).
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3.10 Hold Mode
The DH85 has the facility to display the maximum reading, the
minimum reading, the difference between maximum and minimum
readings and the average of the recorded readings (Humidity and
temperature measurements only).
To enter the Hold mode press MODE while in Measurement mode.
The LCD will display HOLD and the last measured values will be
held on the display.
Successive presses of the MODE button will display the following in
sequence:
HOLD MAX - maximum recorded reading;
HOLD MIN - minimum recorded reading;
HOLD MAX-MIN - difference between max and min recorded
readings;
HOLD AVG - average of the recorded readings.
The unit will return to the Measurement mode at the end of the
above sequence.
To clear the recorded readings, press MODE for 2 seconds
at any point in the above sequence. The unit will return to the
Measurement mode.
Note: The Hold mode will not function until at least 3 measurements
have been stored to memory.
3.11 Measurement Considerations
The moisture content in the material may vary, so it is advisable to
take measurements at more than one point.
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To achieve accurate measurements, it is advisable to allow the DH85
sufficient time to reach temperature and humidity equilibrium with the
environment of the material under test.
The following factors can effect temperature measurement –
exposure to sunshine during measurement, heating systems, cold
external walls, movement of air (e.g. fans), hands or body heat and
insufficient stabilisation or measurement time.
The following factors can effect humidity measurement – exposure to
steam, water or condensation on the sensor.
4. MAINTENANCE
4.1 Battery Replacement
Push the battery cover up towards the probes and lift away from the
back of the DH85.
Remove the old batteries from the battery compartment.
Replace with 2 x new AAA batteries (IEC LR03, NEDA 24A),
observing correct polarity as indicated on the base of the battery
compartment.
Replace the battery cover.
Note: Do not mix old and new batteries.
4.2 Calibration
To maintain the integrity of measurements made using your
instrument, Martindale Electric recommends that it is returned at least
once a year to an approved Calibration Laboratory for recalibration
and certification.
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Martindale Electric is pleased to offer you this service. Please
contact our Service Department for details.
Email: [e-mail]
Tel: [phone]
4.3 Cleaning
If contamination is found, clean with a damp soft cloth and if
necessary a mild detergent. Do not use abrasives, abrasive
solvents, or detergents which can cause damage to the unit. If a
mild detergent is used, the unit should subsequently be thoroughly
cleaned with a water dampened soft cloth. After cleaning, dry and
allow to remain in a dry environment for 2 hours before use.
4.4 Repair & Service
There are no user serviceable parts in this unit other than those that
may be described in section 4. Return to Martindale Electric if faulty.
Our service department will provide a quotation to repair any fault
that occurs outside the guarantee period.
Before the unit is returned, please ensure that you have checked the
unit and batteries.
4.5 Storage Conditions
The instrument should be kept in warm dry conditions away from
direct sources of heat or sunlight, and in such a manner as to
preserve the working life of the unit. It is strongly advised that the
unit is not kept in a tool box where other tools may damage it.
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11
5. WARRANTY AND LIMITATION OF LIABILITY
This Martindale product is warranted to be free from defects in
material and workmanship under normal use and service. The
warranty period is 2 years and begins on the date of receipt by the
end user. This warranty extends only to the original buyer or end-
user customer, and does not apply to fuses, disposable batteries,
test leads or to any product which, in Martindale’s opinion, has been
misused, altered, neglected, contaminated, or damaged by accident
or abnormal conditions of operation, handling or storage.
Martindale authorised resellers shall extend this warranty on new and
unused products to end-user customers only but have no authority to
extend a greater or different warranty on behalf of Martindale.
Martindale’s warranty obligation is limited, at Martindale’s option, to
refund of the purchase price, free of charge repair, or replacement of
a defective product which is returned to Martindale within the warranty
period.
This warranty is the buyer’s sole and exclusive remedy and is in lieu
of all other warranties, expressed or implied, including but not limited
to any implied warranty of merchantability or fitness for a particular
purpose. Martindale shall not be liable for any special, indirect,
incidental or consequential damages or losses, including loss of data,
arising from any cause or theory.
Since some jurisdictions do not allow limitation of the term of
an implied warranty, or exclusion or limitation of incidental or
consequential damages, the limitations and exclusions of this warranty
may not apply to every buyer. If any part of any provision of this
warranty is held invalid or unenforceable by a court or other decision-
maker of competent jurisdiction, such holding will not affect the validity
or enforceability of any other provision or other part of that provision.
Nothing in this statement reduces your statutory rights.
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SpeciÀcation
DH85
Hygro-moisture meter
All specified accuracies are at 23°C ± 5°C, <70% R.H. for 1
year.
Temperature coefficient: 0.1 x (specified accuracy) per °C,
(-20°C to 18°C, 28°C to 60°C).
MOISTURE
Range Resolution Accuracy
Wood 1 – 8.8% to 54.8% (Hard wood)
0.1%
± 1%
(conductivity
measurement)
Wood 2 – 7.0% to 47.9% (Soft wood)
Mortar 3 – 0.9% to 22.1% (Plaster)
Mortar 4 – 0.0% to 11.0% (Anhydrite screed)
Mortar 5 – 0.7% to 8.6% (Cement mortar)
Mortar 6 – 0.6% to 9.9% (Lime mortar)
Mortar 7 – 0.1% to 16.5% (Bricks)
RELATIVE HUMIDITY
Range Resolution Accuracy
0 to 100% R.H. 0.1% R.H. ± 2.5% (10% to 90% R.H.)
± 5% (0% to 10%, 90% to 100% R.H.)
Sensor: Digital capacitive humidity sensor
Sensor response time for 90% of total range: 60 seconds typical
Sensor hysteresis (excursion of 10% to 90% to 10% R.H.): ±1% R.H. typical
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SpeciÀcation
DH85
Hygro-moisture meter
TEMPERATURE
Range Resolution Accuracy
-20°C to 60°C 0.1°C ± 0.5°C (0°C to 45°C)
± 1°C (-20°C to 0°C, 45°C to 60°C)
-4°F to 140°F 0.1°F ± 1°F (32°F to 113°F)
± 2°F (-4°F to 32°F, 113°F to 140°F)
Sensor: thermistor temperature sensor
GENERAL
Display: liquid crystal display
Measurement rate: once per second
Power: 2 x 1.5V, AAA alkaline batteries (IEC LR03, NEDA 24A)
Continuous operating time: 200 hours typical with alkaline battery
Low battery indication: The is displayed when the battery voltage drops
below the operating level
Auto power off: after approx. 10 minutes
Dimensions: 132.9(L) x 50.9(W) x 24.7(D) mm
Weight: 118g approx including batteries
Includes: protective cover, 2 x 1.5V AAA batteries, detachable carry strap and
instructions
ENVIRONMENTAL
Operating environment: -20°C to 60°C
Storage environment: -20°C to 60°C <80% R.H. with batteries removed
EMC
Conforms to BS EN61326-1
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DH85 instructions rev1.indd 1 19/06/2014 14:06:06
Martindale Electric Company Ltd,
Metrohm House, Imperial Park, Imperial Way,
Watford, Hertfordshire, WD24 4PP, UK
Tel: [phone] Fax: [phone]
E-mail:[email protected]
Website:www.martindale-electric.co.uk
©2014MartindaleElectricCompanyLtd.
Registered in England No. 3387451. E. & O.E. LITDH85 Document Rev1
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