User Manual-MC7825G - M & I Instruments Inc.
Contents
1. Battery compartment Cover 3 value by depressing the plus key orminus key If the second limit AL2 isless than the first limit ALI the setting is invalid and the factory settings for ALI and AL2 are restored to AL1 13 and AL2 18 automatically 6 CONSIDERATIONS 6 1 Thisinstrument is of very high input resistance Every part has good insulation Please keepit in adry dustproof place 6 2 Itisvery very difficultto accurately measure the moisture content of grains Thisis because any grain is of organic body The same kind of grain indifferent regions or states even inthe same region or state but in different soils has different characteristics That is why we first measure the moisture content of grain by the standard method of oven the most accurate but less efficient method to measure the moisture content then measure the moisture content using such instruments By calculating the bias we could amend the measurement value In this case the measurement are moreaccurate and more efficient 7 BATTERY REPLACEMENT When the battery symbolappears on thedisplay it is time to replace the battery Remove the batteries and install new ones paying careful attention to polarity 4 MEASURING PROCEDURE 4 1 Depress the power key and release to power on the meter 4 2 To check if the grain code is right by pressing and releasing the Function key Such code can be changed by the Plus Hold key or Minus Zero key when the cdxx is on the2. display Here cd is the abbreviation for code and xx is the grain code no If keep depressing the Plus Hold or Minus Zero key the material code will step into next code about every second and releasing it till the grain code is right 4 3 Grain code selection The grain codes are listed in the table on page 7 if the grain to be measured is not listed in the table please ascertain its grain code among cd01 and cd36 by the standard oven drying method that is by oven drying of commercial samples of the grain to be measured Write down the code for later use 4 4 Insert the plug 3 2 of the measurer into the probe jack 3 3 4 5 Insert the needles into the grain to be measured The reading on the display is the moisture content Read the moisture level value from the display and note the moisture condition of the material from the colour coded LED Please note that reading will change if needles stayin grain longer 4 5 To hold the max value during measurements 4
3. Appendix Code table for Grains code grain code grain code grain Wheat Rye Coffee Flax cd01 cd13 cd25 Whole Whole Whole Wheat Rye Coffee Peas Progreta cd02 cdl4 cd26 Ground Ground Ground Paddy Coffee Green Peas cd03 cd15 cd27 Whole Ground Ground Paddy Cocoa Beans Ground nuts Hulled cd04 cdl6 cd28 Ground Whole Whole Rice Linseed Grass Seed Rye grass cd05 cd17 cd29 Milled Whole Whole Lentils Grass Seed Cocksfoot cd06 Semolina cd18 cd30 Ground Whole Whole Maize Com Oilseed Rape cd07 cd19 cd31 Flour Soft Wheat Whole Ground Maize Com Mustard Seed Clover White Seed cd08 cd20 cd32 Ground Whole Whole Soya Beans Sorghum Milo Clover Red Lucerne Seed cd09 cd21 cd33 Whole Whole Whole Soya Beans Sorghum Milo Buckwheat cd10 cd22 cd34 Ground Ground Ground Barley Oats Sunflower seed Brassicas Brussels Sprout cd11 cd23 cd35 Whole Whole whole ground Barley Oats Sugarbeet Seed Beans Tic Winte ed12 cd24 cd36 Ground Whole Ground Just depress the A HOLD key till the symbol max appears on the display To display the instant values just depress the A HOLD key again tillthe symbol max disappears on the display 4 6 Zero calibration The zero feature enable the user to compensate for the effect of changes in both temperature and humidity When the probe does not touch anythin
4. g besides air thereading onthe display should be 0 or 0 0 If not please depress and release the zero key to carry out zero calibration 5 ALARM LIMITS 5 1 Thereis acoded coloured LED indicating the status of moisture Itis controlled by 2 alarm limits The factory settings are as follow AL1 13 and AL2 18 If the reading lt AL1 the green LEDis on If the reading gt AL 2 the red LEDis on If the reading lies between AL1 and AL2 the yellow LEDis on Users can change the alarm limits when as per their intention 5 2 Howto set the alarm limits 5 2 1 Depress Power key and notrelease it till AL1 AL2 appears onthe Display Itis about 7 or9 seconds from starting depressing Power key 5 2 2 Such value can be changed to your intended 5 GRAIN MOISTURE METER Green LED representsa safe air dry state Yellow LED representsa borderline State Red LED representsa damp state Range average 6 30 Accuracy 5 nor 0 5 Whichever isthe greater PC interface RS232C interface Cable and software is not included Power supply 4x1 5 AA Asize UM 4 battery Power off 2 modes Manual offat any time Auto power offafter 5 minutes from last key operation Operating conditions Temperature 0 50 C Humidity below 90 RH Dimensions Unit 165x62x26mm or 6 5x2 4x1 0 inch Probe 368x44x25 mm or 14 5x1 7x1 0 inch Weight 320g not including batteries but including the probe Standard accessories included Carryi
5. ng case 1 pe Operation manual l pe PHO DG ssieiesscesck cosug heceeoncies s 1 pe Optional accessory Cable andsoftware forRS232C 2 1 FEATURES Be a powerful and versatile instrument for measuring and diagnosing dampness in grains Widely used for fast and accurate measurement of moisture and temperature in the process of allotment acquisition storage machining of packed grains Digital display gives exact reading with no guessing or errors while a colour coded light LED indicates the moisture condition of the material This combined presentation of moisture measurement helps the user to map the extent of problems and monitor changes in condition precisely and reliably Used the exclusive Micro computer LSI circuit and crystal time base to offer high accuracy measurement It can obtain automatically the temperature corrected moisture value Wide measuringrange and high resolution Automatic power off to conserve power Can communicate with PC computer for statistics and printing by the optional cable and software for RS232C interface 2 SPECIFICATIONS Display 4 digits 10 mm LCD Withcolour coded LEDs indication 1 3 FRONT PANELDESCRIPTIONS f f l 3 11 3 8 3 5 3 1 Probe 3 2 Probe plug 3 3 Probe jack 3 4 Display 3 5 RS232C interface 3 6 Color coded LED 3 7 3 8 3 9 3 1 3 1 7 Plus Hold key Minus Zero key Function key 10 Power key 11
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