Innovative instruments DMM B18 User manual

DIGITAL MOISTURE METER
MODEL: DMM B18
125, MAHAJAN SOCIETY, B/H CONVENT SCHOOL,
FATEHGUNJ, BARODA 390 002, GUJARAT, INDIA.
Contact: [phone], + 91 6356615024
Or Email us at: info@ innovative-instruments.in,
[e-mail]
Visit: www.innovative-instruments.in
since 1981…

DMM B18 Manual
(English)
JULY 2022 Page 2
CONTENTS
1. INTRODUCTION ---------------------------------------------------------------------------
Page 3
2. MODELS --------------------------------------------------------------------------------------
Page 4
3. FEATURES -----------------------------------------------------------------------------------
Page 4
4. TECHNICAL SPECIFICATIONS ------------------------------------------------------
Page 4
5. OPERATING PROCEDURE -------------------------------------------------------------
Page 5
6. PROCEDURE TO REPLACE BATTERIES ------------------------------------------
Page 6
7. SAMPLE PREPARATION AND HANDLING ---------------------------------------
Page 6
8. WARRANTY ---------------------------------------------------------------------------------
Page 6
9. MOISTURE GUIDELINES IN DIFFERENT COMMODITIES -----------------
Page 7

DMM B18 Manual
(English)
JULY 2022 Page 3
1. INTRODUCTION
1.1 Principle:
DMM B18 digital moisture meter works on the radio-frequency (RF) dielectric method. This method
measures moisture content in sample by sensing the dielectric constant of the sample. The dielectric constant
is a measure of a material’s ability to store electrical charge when placed in an electric field. Because of its
molecular structure, water has a very high dielectric constant (approximately 80) compared to other grain
constituents (2 to 3). The RF dielectric method is influenced significantly by grain kernel structure and
composition, moisture distribution within kernels and grain temperature, necessitating individual calibration
equations for different grain types.
1.2 Calibration method:
DMM B18 digital moisture meter is calibrated using a standard process. This calibration process consists of
determining individual calibration equation by establishing a co-relation between the measured dielectric
constant of the sample and the standard reference method. The standard reference methods used are Oven
Drying Method and Toluene method (Dean-Stark) as applicable for the sample. The calibration equation
compensates the temperature variation of the sample too.
I. The Oven Drying Method: References for the standard methods used:
ISO 712: 1998 : Cereal and cereal products :Determination of moisture content - Routine reference
method
IS 4333(part 2) : 2002 (Reaffirmed in 2012) : Method of analysis for food grains, Determination of
moisture content
Method: The sample is ground after pre conditioning. It is dried in a preheated oven at a temperature
of 130 0C+/- 3 0C for 2-3 hrs till constant weight of the sample is achieved.
ISO 6540 : Maize-Determination of moisture content in milled grains and whole grains
Method: The sample is ground after pre conditioning. It is dried in a preheated oven at a temperature
of 130 0C+/- 3 0C for 4 hrs till constant weight of the sample is achieved.
ISO 665: 2002 - Determination of moisture and volatile matter for oilseeds
IS 3579-1966 (Reaffirmed in 2000): Method of test for Oilseeds.
Method: The sample is ground after pre conditioning. It is dried in a preheated oven at a temperature
of 103 0C+/- 2 0C for 6-7 hrs till constant weight of the sample is achieved.
II.Distillation Method (The Dean and Stark) : References for the standard methods used:
ISO 939-2021: Spices and condiments- Determination of moisture content
Method: A known weight of sample is placed in a flask with an organic solvent toluene which is
insoluble with water and has higher boiling point and less density than water. This flask is attached to
a condenser and the mixture is heated. The water in the sample evaporates and moves up into the
condenser where it is cooled and converted back into liquid water, which then trickles into the
graduated tube. When no more water is collected in the graduated tube (this process takes around 1
hr), distillation is stopped and the volume of water is read from the tube. This water is directly
proportional to the moisture content in the sample.

DMM B18 Manual
(English)
JULY 2022 Page 4
2. MODELS
I. DMM B18 (SMALL) Digital Moisture Meter is widely used by the producers, suppliers and traders for
measuring moisture content of various small size food products such as Cereals, Pulses, Dals, Oilseeds,
Spices, Vegetable Seeds, DOC’s & Cakes, Flours And Powders, Dehydrated Products, Dry Fruits, Medicinal
seeds and other miscellaneous products
II.DMM B18 (BIG) Digital Moisture Meter is widely used by the producers, suppliers and traders for
measuring moisture content of various bigger size food products such as Papad Pipe/ Fryums, Dry Ginger,
Nutmeg, Cashew Kernel, Raw Cashew , Chikori Cubes, Chikori Grains, Bagasse, Black Pepper, Groundnut
Pods, Betel Nut/ Sopari, SoyaVadi, Dhupa Seed, Almond, Long Pepper etc.
3. FEATURES
Auto start to 00.0% moisture in all commodities.
Auto senses empty meter and displays "Pour".
Indication for selected commodity.
Direct easy to read display in %.
Auto switch off after 10 minutes of no operation.
Automatic Internal Temperature Compensation.
Non-destructive testing.
Easy to use: Pour and get result.
Repeatable and accurate results.
Compact in size, light in weight and portable to carry.
Rugged construction for field use.
Optional BLE (Bluetooth Low Energy) connectivity with mobile app for real time moisture data
recording available for bulk users.
4. TECHNICAL SPECIFICATIONS
Table 4.1
Specification
DMM B18 (SMALL)
DMM B18 (BIG)
Moisture display :
XX.X % (3 digit display)
Moisture range :
3% to 35%
Resolution :
0.1%
Accuracy :
+/- 0.5%
Power source :
1.5V AA pencil cells x 4 qty
Sampling rate :
60 samples per hour
Power consumption:
0.04 Watts
Construction:
Molded from high impact resistant ABS plastic
Switch :
Tactile switch
Display :
Custom LCD display
Dimensions (Approx.)
:
92H x 145W x 110D mm
180H x 190W x 225D mm
Weight (Approx.) :
600 grams
1 kg
Commodity Sample
Size :
Full volume or 30 to 150 gram as
specified for commodity
300 to 500 grams as specified for
commodity
BLE Connectivity :
Available for bulk users
Available for bulk users

DMM B18 Manual
(English)
JULY 2022 Page 5
5. OPERATING PROCEDURE
i. Place meter on a wooden table. Ensure no object is near the meter and no sample is in the cavity.
ii.Press ON/OFF switch. “ ” will blink for few seconds. Do not touch the meter while “ ” is
blinking.
iii.Wait till “ ” is displayed.
iv.Once “ ” is displayed, press CHANNEL 1 switch to see that meter displays “CH . %M”
when meter is empty. After few seconds meter will automatically display “ ” if no sample is dropped in
meter.
v. Take the indicated weight or volume of the sample to be tested. Fill hopper with the sample. Weigh
accurately as mentioned. For “FULL” or “WEIGHT NOT MENTIONED”, fill the hopper fully.
vi. Place the sample filled hopper on meter and drop down the sample in meter cavity by pressing the
lever.
vii. Remove the empty hopper and keep aside.
viii. Press the appropriate channel switch to start the moisture measurement. “ ” will blink for few
seconds then moisture will be displayed. DO NOT SHAKE OR TOUCH THE METER WHILE “ ” IS BLINKING
ON DISPLAY
Where “CH 1” indicates channel/switch no., “ ” is the moisture %.
ix.Once meter is emptied, “ ” will be displayed after few seconds. Machine is intelligent enough to
sense that the sample is taken out and now the cavity is empty. Once meter is displaying “ ”, next sample
can be measured. Repeat from step 3.
x. The meter gets automatically switched OFF after 10 minutes if not in use. Or press ON/OFF to switch
off the machine.
* Operating Procedure for moisture measurement in Cotton Seed, Rui, Kapas:
Follow steps i to iv as mentioned above.
Weigh the sample as indicated on the meter and fill with hand in the meter cavity.
Gently press the sample with hand until the sample is compressed into the meter cavity.
Follow steps viii to x as mentioned above.

DMM B18 Manual
(English)
JULY 2022 Page 6
6. PROCEDURE TO REPLACE BATTERIES
If “ ” appears on the display on pressing any switch, then there is a need for replacement of
batteries.
The battery compartment is located at the bottom of the meter. Pop up the flap to remove the battery.
Insert 4 nos. of fresh battery (1.5V, AA pencil cell) with proper polarity.
7. SAMPLE PREPARATION AND HANDLING
This is most important to get the best representative results. The sample taken should be well mixed and its
condition should be typical of the total batch. If a sample is to be held for a short time before being tested for
moisture content, this should be placed into a tightly closed (air-tight) container such as plastic bag or jar. A
sample stored in this manner will not lose or gain moisture. The temperature of air and sample, relative
humidity of air and the moisture content of the sample will all work together to determine whether the sample
loses or gains moisture. A high moisture sample spread out to air can gain or lose 1% to 2% moisture in only
few minutes.
Cold samples when brought into warm atmosphere will condense moisture out of air and cause erroneous
readings. Such samples should be sealed in air-tight container before being brought back to warm atmosphere
and allowed to warm to room temperature before testing. Similar care should be taken for heated samples
also.
Sample with water added externally will show higher moisture than the actual, when tested immediately after
adding the water to the sample. Such sample with water added, should be shaken periodically and should be
kept at low temperature in a sealed jar for at least 24 hrs. This will ensure the uniform moisture penetration in
the sample and then it can be tested in the meter. In any case, free water deposition on sample grain surface
should not be entertained for measurement using this meter.
8. WARRANTY
Digital Moisture Meter is guaranteed free from defect in material and workmanship for a period of 1 year
from the date of purchase. This does not cover the battery or damage caused by misuse or negligence or a
Digital Moisture Meter repaired or altered by any unauthorised agents. Written authorisation from the factory
is necessary before any moisture meter can be returned under the terms of this warranty.
In the event that service is required and authorisation has been obtained, pack the unit carefully and return to
factory with transportation prepaid. If the Digital Moisture Meter is returned within the warranty period, this
will be sent back to the customer after repair, free of charge. However, component replacement shall be
charged. After the warranty period your Digital Moisture Meter will be repaired at the cost of the materials,
labour and shipping.

DMM B18 Manual
(English)
JULY 2022 Page 7
9. MOISTURE GUIDELINES IN DIFFERENT COMMODITIES
Table 9.1 DMM B18 SMALL:
Commodity
Average natural
moisture (%)
Commodity
Average natural
moisture (%)
Commodity
Average natural
moisture (%)
CEREALS
Wheat
10.0
Paddy
11.0
Maize
11.0
Bajra/ Millet
10.0
Jowar/ Sorghum
10.0
Boiled Broken rice
13.0
Barley
10.0
Boiled rice
12.0
Ragi
10.0
Hulled Barley
9.0
Basmati rice
12.0
Maize Grit
11.0
Broken Rice
12.0
Raw Rice
12.0
Big paddy
11.0
Small paddy
11.0
PULSES
Moong
9.0
Tur
10.0
Cowpeas
10.0
Chana
9.0
Masoor
10.0
Tivda/ Khesari
10.0
Kabuli chana
10.5
Moth
9.0
Vaal
10.0
Batri
10.0
Rajama
13.0
Peas
9.5
Urad
10.0
DALS
Tur dal
9.0
Moong dal
9.0
Urad dal Chilka
11.0
Chana dal
9.0
Moth dal
9.5
Kabuli chana dal
10.0
Masoor dal
9.5
Moong dal chilka
10.0
Tivda dal
9.0
Urad dal
9.5
Peas dal
9.5
Cowpeas dal
10.0
OILSEEDS
Groundnut
5.0
Mustard
6.5
Rui
7.0
Groundnut HPS
5.0
Kardi/ Saflower)
7.0
Cottonseed
7.0
Til
3.5
Neemseed
6.0
Kapas
7.0
Sunflower
6.0
Toria
6.5
Karanja
6.0
Nijjar
6.5
Hulled Til
3.5
Jetropha
5.5
Lin seed
6.0
Soyabean
7.0
Castor
4.5
Mahuva
7.0
SPICES
Cumin/ Jeera
7.0
Blackpepper
9.5
Fennel /Variyali
6.0
Dhania/Coriander
8.0
Cloves
7.0
Cardamom/Elaichi
9.5
Fenugreek/ Methi
8.0
Celery/ Ajwain
7.5
Long pepper
10.0
Cardamom seed
9.0
VEGETABLE SEEDS
Bhindi/ Okara
9.0
Chilli Seed
9.0
Carrot
9.0
Ash Gourd/ Galka
8.0
Bitter Gourd/
Karela
9.0
Cucumber
8.0
Ridge Gourd/
Turia
8.0
Sponge Gourd
8.0
Bottle Gourd/
Lauki
8.0
Tomato
9.0
Radish
9.0
Snake Gourd
8.0
Muskmelon
8.0
Pumpkin
8.0
Cabbage
10.0
Spinach
10.0
Onion Seed
10.0
Watermelon
8.0
Potato
8.0
Brinjal
9.0

DMM B18 Manual
(English)
JULY 2022 Page 8
DOC'S & CAKES
Soya Doc
10.0
Sunflower Doc
9.5
Mustard Doc
8.5
Poultry Feed
11.5
DORB
9.0
Mustard Cake
8.5
Castor Doc
7.0
Groundnut Doc
9.5
Til Doc
6.0
Cottonseed Cake
9.0
Cattle Feed
10.0
Lin Seed Doc
8.0
Rice Bran/ Rice
Polish
9.0
FLOURS & POWDERS
Atta
10.0
Soji/ Rava
12.0
Maida
13.5
Besan (Peas)
9.0
Besan (Chana)
9.0
Besan (Chickpeas)
9.0
Bhusi Small
10.0
Bhusi Big
12.0
DEHYDRATED PRODUCTS
Garlic Buds
8.5
Garlic Powder
8.0
Coconut Powder
2.0
Onion Flakes
6.5
Onion Powder
5.0
DRY FRUITS
Cashew Kernel
3.5
Almond
5.0
Raisin
11.0
Pista
3.5
Walnut
6.5
MEDICINAL
Gloriasa Superba/
Herbal Seed
10.0
Isabgol
8.0
Isabgol Husk
10.0
Paracetamol
Powder
8.0
MISCELLANEOUS
Puvad/ Cassia seed
7.5
Guvar Gum
11.0
Guvar
10.0
Fava Seed
10.0
Puvad Dal
8.7
Guvar Churi
10.5
Chia seed
6.0
DDGS
11.0
Quinoa Seed
12.0
Coffee Beans
9.0
Cocoa Beans
9.0
Jute Seed
9.0
Noni Seed
10.0
Lotus Seed
10.0
Rajgaro
9.5
Neem Fruit
8.0
Neem Cake
9.5
Table 9.2 DMM B18 BIG:
PapadPipe/Fryums
6.5
Dry Ginger
8.0
Dhupa Seed
10.0
Cashew Kernel
3.5
Raw Cashew
5.0
Nutmeg
10.0
Chikori Grains
8.0
Bagasse
5.0
Chikori Cubes
8.0
Groundnut Pods
5.0
Betel Nut/ Sopari
10.0
Black Pepper
9.5
Long Pepper
10.0
Almond
5.0
Soya vadi
8.5
Dry Ginger Pieces
10.0