Nigos RVD-904 User manual

TABLE OF CONTENTS
1.
2.
3.
4.
.1
.2
.
.
.
QUICK REFERENCE GUIDE
TECHNICAL SPECIFICATION
DESCRIPTION OF MOISTURE METER AND ADDITIONAL EQUIPMENT
DEVICE SET-UP AND ADJUSTMENT FOR MEASUREMENT
4 WOOD TYPE (or CONCRETE TYPE) parameter setting
4 WOOD TEMPERATURE (or CONCRETE TEMPERATURE) parameter setting
5 WOOD MOISTURE CONTENT MEASUREMENT
5.1 General notes regarding wood MC measurement
6 AIR TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENT (OPTIONAL)
6.1 Air temperature and relative humidity measurement procedure
7 CONSTRUCTION MATERIALS MOISTURE CONTENT MEASUREMENT (OPTIONAL)
7.1 Construction materials MC measurement procedure
8. APPENDIX - WOOD TYPES TABLE
9. NOTES
................................................................................................................... 2
................................................................................................................. 5
........................................................ 6
.......................................................................... 8
.................................................................. 8
...................................... 9
....................................................................................... 10
................................................................. 11
.............................................. 12
........................................... 13
..................................... 14
............................................................. 15
.......................................................................................................... 16
............................................................................................................................................... 17
1
RVD-904

RVD-904
2
1. Turning the meter ON
- Press the button briefly
- Immediately after powering on, the device is ready
for parameter setting and measurement
1. QUICK REFERENCE GUIDE
0ff
HOLD
ON
OFF
UP/DOWN
WOOD MOISTURE METER
0)0
ON
OFF
T
TYPE
ON
OFF
2. Wood type adjustment
- Press and hold button
to adjust parameter WOOD TYPE
TYPE
; use and
)64
HOLD
ON
OFF
UP/DOWN
t
m
3
WOOD MOISTURE METER
t4
TYPE
T

RVD-904
3
3. Wood temperature adjustment 4. Probes setting and connection
- place the probes (electrodes) perpendicularly to
wood fibers and hammer them in timber board
using action hammer to the depth of 1/3 of the
timber board
- connect probes and moisture meter
using measurement cable
RVD-904
- Press and hold button
to adjust WOOD TEMPERATURE
; use and
T
2#0
HOLD
ON
OFF
UP/DOWN
UP/DOWN
mm
TYPE
WOOD MOISTURE METER
2#0
T

RVD-904
4
5. Measurement - moisture content reading
- Turn the meter on and wait for reading to stabilize.
Read the measured value.
- If needed, press briefly button to hold the
measured value displayed for later reading
- Press the button briefly
0ff
HOLD
ON
OFF
UP/DOWN
T
TYPE
WOOD MOISTURE METER
0ff
ON
OFF
ON
OFF
6. Turning the meter OFF
HOLD
)64
HOLD
ON
OFF
UP/DOWN
T
TYPE
WOOD MOISTURE METER
1@1
HOLD

2. TECHNICAL SPECIFICATION
GENERAL CHARACTERISTICS
Power supply
ay
Operating conditions
Storage
Dimensions W H
Weight
Displ
(xxD)
9V battery, Alkaline or NiCd Aku.
LCD, digital
80 x 150 x 40 (mm)
T:550C;RH:580%
0
¸¸
¸¸T:-40 50 C;RH:5 90%
()
200 g
0
MEASUREMENT
Measurement resolution
Measurement range
0.1 %
()(4 100) %¸
RVD-904
9)4
HOLD
ON
OFF
UP/DOWN
WOOD MOISTURE METER
TTYPE
RVD-904
5

RVD-904
9)4
HOLD
ON
OFF
UP/DOWN
WOOD MOISTURE METER
TTYPE
3. DESCRIPTION OF MOISTURE METER AND ADDITIONAL EQUIPMENT
OPTIONAL
1
5
6
7
4
12
6
RVD-904
2
3
8
9
10
11

7
Universal portable moisture meter is built for wood,
concrete and other materials moisture content measurement.
Device is placed in the plastic case with large display for
indication of all measurement data and flat keyboard
for device control.
Standard set of equipment consists of device itself, set of wood
probes, action hammer for probes insertion and measurement
cable for probes and meter inter-connection. BNC connector
on the top side of meter is for measurement cable connection.
and/or pair of concrete probes are delivered. In first
case, additional connector (USB type) is installed on top side
of portable meter
RVD-904
DSVT-03
Optionally (on user request), air temperature/humidity probe
beside BNC connector. This
connector is used for connection of air temperature/humidity
probe .
RVD-904
DSVT-03
RVD-904 FRONT SIDE LAYOUT
LC DISPLAY
WOOD TEMPERATURE
UP DOWN
BNC
Measurement cable
probes
p DSVT-03 optional
probes optional
1. shows:
- measured moisture content
- parameter values
- error notes during measurement
2. Button
3. Buttons and used for increasing and
decreasing of value of selected parameter
4. connector for measurement cable
5
.
7.
8.
9. for probes connection
10. Wood
11. Temperature/Humidity ( )
12. Concrete ( )
. Button
6 button
Button
for probes inserting
WOOD TYPE
ON / OFF
HOLD
ADDITIONAL EQUIPMENT
Action hammer
robe
RVD-904

8
RVD-904
4. DEVICE SET-UP AND ADJUSTMENT FOR MEASUREMENT
Certain parameters which depend on measured sample and measurement conditions must be adjusted
before measurement. This is crucial because measured moisture content greatly depends on parameter settings.
o,
,,, , .
.
4.1 WOOD TYPE (or CONCRETE TYPE) parameter setting
TYPEInformation regarding type of wood (or concrete) is defined by the value of parameter , which represent the
group - type of measured sample. All wood species are divided into 4 groups,
represented by values t1 t4
b1
t and appropriate value must be entered
for the parameter .
Also, different types of construction materials are divided into 6 groups:
TYPE
b2 b3 b15 b25 b35and according to their characteristics
Information regarding wood type for most common wood species are
given in Appendix, or some other reliable sources can be used
the buttons ( ) or ( ) to adjust desired value.DOWN UP
Parameter setting procedure: Press and hold the button and use
TYPE
)64
HOLD
ON
OFF
UP/DOWN
T
t
m
3
WOOD MOISTURE METER
t3
TYPE

.
Therefore, it is necessary to measure wood or air temperature using appropriate thermometer, and enter that
value as a parameter setting. Same procedure is needed for concrete MC measurement. Data
entry procedure is similar to one used for parameter:
4.2
C
TEMPERATURE
TYPE
WOOD TEMPERATURE (or CONCRETE TEMPERATURE) parameter setting
Second data needed for correct wood moisture content measurement is wood temperature (most
commonly wood temperature is equal to surrounding air temperature, so this data can also be used as
relevant data for measurement). Temperature is entered in
o
- Press and hold button ( ). Device will display temperature
value (in )
TEMPERATURE
o
Cwhich was last entered.
- Holding the button pressed, press the buttons ( )
or ( ) to adjust desired value for temperature. Long pressing on
these buttons will provoke faster change of parameter in desired
direction
- Release all buttons. After this, device will again display currently measured
moisture content.
DOWN
UP
T
T
2#0
HOLD
ON
OFF
UP/DOWN
UP/DOWN
mm
TYPE
WOOD MOISTURE METER
3#0
T
9
RVD-904

10
Basic purpose of this device is wood moisture content (MC) measurement. This value (MC) is represented in
percent (%) of moisture. Measurement is performed in following steps:
- Probes (electrodes) are hammered in the timber using provided action hammer, perpendicular to wood fibre
and at the measurement depth. Note that MC is not uniformly distributed and is highest in the middle of the
board and lowest on the surface. Average MC is measured at 1/3 of the board.
- Connect the probes and instrument using measurement cable: connect BNC connector on one side of cable
to RVD-904, and free endings on the other side of cable to probes hammered in the wooden sample.
Measurement circle is formed this way and system is ready for measurement;
- Turn on the portable meter;
- Avoid pressing any button after powering, wait for displayed value to stabilize and make a reading;
-
-
Low MC measurement require longer stabilization period (one to several seconds in practice). During
extremely low MC measurement, it is necessary to repeat measurement procedure several times before
accepting the measured value. Also, avoid moving around during measurement because it will influence the
measurement and slow down stabilization of reading. If possible, repeat measurement in several points of
wooden sample to achieve most reliable measurement data.
Turn off the portable meter;
If necessary, repeat procedures 3 and 4. If measured values are same, measurement is successful.
Note:
RVD-904
5. WOOD MOISTURE CONTENT MEASUREMENT

5.1 General notes regarding wood MC measurement
RVD-904
Static electricity
universal portable moisture meter operation principle is based on electric resistance measurement
method. Electric resistance of the wood depends on wood moisture content, with almost linear dependancy in
range 4% to 30% MC. For obtaining most accurate data, it is best to perform measurement in several points.
Also, measurement electrodes should be inserted perpendicular to wood growing direction and at measurement
depth between 1/4 and 1/3 of timber thickness. When wood with high MC is measured (above 30%, raw timber)
measurement accuracy drop should be expected with MC increase. Further, wood type, temperature and other
parameters influence this measurement, so data obtained should be taken with some reserve.
It is not recommended to measure MC in frozen wood!
is common phenomenon in wood working environment, especially near dried timber.
It appears in dry atmosphere environment, intensive manipulation of dried wood (especially veneer!), and is
particularly developed when equipment made of artificial materials is used (for example plastic saw dust
collection pipes).
High voltage discharges may occur which, although not dangerous for people, may cause measurement error
and in some cases even damage portable meter. This is why all precaution measures in these environments
must be taken to minimize the possibility of measurement errors and damage of device.
However, even in these conditions it is possible to make accurate measurement providing that operator is
standing still and avoid any movement of measurement cable and portable meter during measurement.
11
RVD-904

6. AIR TEMPERATURE AND RELATIVE HUMIDITY MEASUREMENT (OPTIONAL)
DSVT-03 PROBE GENERAL CHARACTERISTICS
Power supply
Tube dimensions (D(mm) / )
Cable length / connector
Operating conditions
Storage
Weight

From RVD-904
140 / 22
2m / USB type
T: -20 80 C; RH: 0 100%
85 g
¸
¸¸
0
¸
T:-40 70 C;RH:5 90%
0
MEASUREMENT
Output signal
Temperature accuracy
Relative humidity accuracy
Digital, encoded
Class 1
Class 2
12
RVD-904

13
On customer request, probe for air temperature and relative humidity measurement is delivered.
In that case, additional connector for connection of this probe (USB type) is installed on moisture meter .
This probe can measure air temperature at which the wood timber is stored and this data can then be used as
the parameter WOOD TEMPERATURE during wood moisture content measurement in case there is no better
(more precise) way to timber temperature.
Air temperature and relative humidity measurement using portable moisture meter and probe for air
temperature and relative humidity is very simple and quick. It is only required to connect the probe to
universal portable moisture meter via special USB type connector, turn the meter on and press the button
DSVT-03
RVD-904
6.1 Air temperature and relative humidity measurement procedure
RVD-904
DSVT-03
RVD-904
RVD-904
to read current air temperature ( ), id est, press the button to read current air humidity ( ).
It is required to wait at least 1 minute before initial measurement in order to allow the sensor inside the probe to
adopt to ambient conditions (if it was previously stored on significantly different temperature or humidity). Also,
for more accurate measurement, if hole measurement set is taken from cold into warm room, it should be left
for short time (several minutes) to adopt, and then proceed with measurement.
During temperature and humidity measurement inside the dryer, probe body should be placed inside the
chamber, while part of cable with connector and portable meter is held outside of it. This is precaution
measure to avoid damaging the meter if operating conditions are exceeded. Measurement should be
performed after sensor is adopted to ambient conditions inside the chamber (few minutes).
in C in %
o

LABEL TYPE OF MATERIAL
b1
b2
b3
b15
b25
b35
Concrete mortar
Plaster
Gypsum
Concrete, Type 15
Concrete, Type 25
Concrete, Type 35
14
7. CONSTRUCTION MATERIALS MOISTURE CONTENT MEASUREMENT (OPTIONAL)
Universal portable moisture meter can also measure moisture content of concrete and other
construction materials such as mortar and gypsum. Measurement principles are similar to ones used in
wood moisture measurement, but there are few differences. First of all, expected values of measured moisture
are lower than ones reached in wood measurement. Also, additional equipment and measurement procedure
differs a little. There is less limitation regarding static electricity and
similar disturbances.
can read moisture content in certain construction materials
which are divided into 6 groups. All groups have labels which are
same as symbolic values used for parameter .
Labels and corresponding materials are given in the table:
Additional equipment is necessary for moisture measurement in these materials and is ordered separately. Two
methods for measurement are used: measurement with contact mass and measurement without it.
on customer request provide especially designed probes (electrodes) used for moisture
measurement .
RVD-904
TYPE
"NIGOS - elektronik"
without contact mass
RVD-904
RVD-904

User must perform certain preparation before actual measurement - adjust portable meter (parameters
Y E and adjustment if necessary) and prepare material for measurement.
Preparation of material imply that two holes must be drilled with suitable tool with the distance of 10cm between
them and vertical to material surface. Holes must have sufficient depth so that probes (electrodes) for concrete
are placed in homogenous material along entire measurement length. Holes diameter must be appropriate to
provide best possible contact of the probes and material (probes must be tightly inserted).
Holes must be thoroughly cleaned of debris before measurement.
If the material is heated during drilling, it must be given enough time to cool down (at least 10 minutes) before
moisture measurement.
After preparation of material, connect the probes and moisture meter using special measurement cable provided,
and perform moisture measurement following same procedure as used in wood moisture content measurement.
Probe for concrete is shown
on following picture:
7.1 Construction materials MC measurement procedure
RVD-904
T P TEMPERATURE
15
RVD-904

WOOD SPECIE WOOD SPECIE WOOD SPECIETYPE TYPE TYPE
Abachi
Abura
Acacia
Afara, White
Afrormosia
Agathis
Alder
Alder, Red
Ash
Ash, American
Atlas
Atlas, Nigerian
Balau
Balsa
Banga Wanga
Basswood
Beech, Chilean
Beech, steamed
Beech, White
Bintangor
Birch
Blackwood,African
Blackwood,Bombay
Boxwood
Camphor
Camphorwood, African
Camphorwood, Borneo
Cedar
Cedar, Red
Chengal
Cherry
Chestnut
Chestnut, American
Cypress
Dibetou
Durian
Ebony
Elm, American
Elm, European
2
3
3
3
2
3
3
3
3
2
2
3
3
3
2
2
2
2
3
2
3
2
2
2
3
3
4
3
3
2
3
3
2
3
4
3
2
2
3
8. APPENDIX - WOOD TYPES TABLE
16
RVD-904

WOOD SPECIE WOOD SPECIE WOOD SPECIE
TYPE TYPE TYPE
Eucalypto
Fir
Geronggang
Greenheart
Greenheart, African
Guatambu
Gum
Hemlock
Hickory
Hornbeam
Ipe
Iroko
Ironwood, Burmese
Ivory Wood, Pink
Jarrah
Jelutong
Jong Kong
Juniper
Kapur
Karri
Kasai
Kempass
Keranji
Keruing
Lapacho
Larch
Lauan
Laurel
Linden (Lime)
Locust
Magnolia
Mahogany, African
Mahogany, Australian
Mahogany, Sapelli
Mahogany, White
Mahogony, Philippines
Mansonia
Maple
Massaranduba
Meranti, Dark Red
Meranti, Light Red
Meranti, Red
3
3
3
2
3
3
3
3
2
2
2
2
2
2
3
3
2
3
4
3
3
3
2
3
2
3
3
3
2
3
3
3
3
3
2
3
2
3
2
3
3
3
17
RVD-904

WOOD SPECIE WOOD SPECIE WOOD SPECIE
TYPE TYPE TYPE
Meranti, White
Meranti, Yellow
Merawan
Merbau
Mersawa
Mulberry
Niangon
Nyatoh (Balam)
Oak, European
Oak, Japanese
Oak, American Red
Oak, White
Okume
Olive Tree
Padauk, African
Padauk, Burma
Palisander
Panga Panga
Pear
Pine
Plum
Poplar
Pyinkado
Ramin
Redwood, Giant
Rosewood
Rubberwood
Seminai
Sequoia
Sepetir
Seraya
Sipo (Utile)
Spruce
Teak
Teak, Rhodesian
Ulin
Walnut, African
Walnut, European
Willow, White
Yew
Zebrano
3
2
3
3
2
3
2
1
3
3
2
2
2
2
2
3
2
2
2
3
3
3
2
2
3
2
1
3
2
3
3
4
3
2
3
2
4
3
2
3
1
18
RVD-904

19
RVD-904
9. NOTES