Upgraded P21-22 Grains Moisture Meter Instructions

Upgraded P21-22 Grains Moisture Meter

Schematic

Preparation before use

1. Remove the dedicated shockproof protective cover on the moisture analyzer measuring transducer, also make sure that there are no substances in the transducer, otherwise, the analyzer will not work properly;
2. Open the battery compartment cover at the bottom of the instrument, and install 4 AA alkaline (1.5V) batteries according to the polarity indicated (rechargeable batteries are not allowed), or plug in the external AC power adapter (100V -240V 50HZ-60HZ)
3. Place the instrument on a flat table with no wind which is shock resistant, and put the funnel cover on a blanking tube;
4. Prepare the sample to test: make the initial screening of samples to remove impurities and the sample is placed together with the instrument as long as possible to achieve temperature equilibrium;
5. Look up the table and select category code: for convenience, the category calibration parameters are pre-set by the factory; when using it only need to check the” Breed Code Table” and select the appropriate category code to conduct direct moisture measurement;
6. If instrument calibration and error correction are needed, the moisture value of the sample measured according to the 105 C standard oven method shall be regarded as the standard value, otherwise, the measurement accuracy cannot be guaranteed.
7. When the instrument is used for trade settlement, safe storage, and other occasions for highly precise measurements, our Company strongly urges the user to adopt calibration and error correction of measured categories under certain conditions so as to ensure accuracy and maintain user interest.

Moisture measurement

1. Press the power switch, the instrument starts self-test, and the breed code will be shown
2. Press “ ” or “ ” to select the breed code according to the breed code table; For example, corn is P 3.
3. Put the test sample in the filling tube to the lower open of the funnel (see Fig.A);
4. Install the filling tube on the instrument transducer port, use one hand to hold the filling tube, and the hand gently press the switch of the material door (as shown in Fig.B), so all samples are dropped into the transducer evenly. Do not press any button, the instrument will automatically start, and the moisture value will be presented after the radix point flashes several times:
5. Close the door of the filling tube and pour out the samples in the transducer to prepare for the next measurement.
6. To reduce measurement error, please pay attention to maintaining the consistency of operating practices;
   • The same sample (especially large particle samples such as corn, etc.) should be for more time and take the mean value; press the “Enter” button, and the mean value for several measurements will be displayed.

Error correction

Due to objective reasons and geographical differences, a certain limit exists in the preset parameters in the factory for calibration, which may cause error during measurement.
In this case, moisture value can be corrected according to the following methods to ensure and improve the measurement accuracy;

1. Determine the error correction value: in general, the moisture value measured by the 105 C standard oven method is the standard value, minus the measured value, and the correction value will be obtained. For example, the measured moisture value is 13.5%, and the actual moisture to display is 14.0%, therefore the correction value is
   +0.5, which means it should be tuned up to 0.5. If the obtained correction value is negative, it needs to be turned down.

2. Correction: pour the sample in the instrument, and press the “Breed” key until hearing the beep The word “Revise” on display flashes, and the originally set error correction is shown as well (the correction value of the factory setting is 0.0).

   • Press the “ or “ key to adjust the correction value, and click the” Enter “button to save the instrument that flashes for confirmation. Shut down the instrument or click the “Breed” key to exit the correction status.

3. The entire correction process is shown as follows:

Calibration

Calibration means making a new setting for the instrument parameters with the known standard moisture sample.
Its effect is to increase the measured species or correct the measurement error of the existing categories accurately.

The instrument can use calibration with four standard samples at most, as follows:

1. Standard sample preparation: prepare the standard sample with the 105 C standard oven method; to make the calibration with the most representativeness and accuracy, the highest and lowest moisture value of the standard sample shall be on both ends of the actual measured moisture scope, where the distance of 3-6 percentages between levels is ideal. Shall the measured moisture scope not exceed 6%, samples can be divided into high, medium, and low three standards or high and low two standards.
   • (For example wheat, water at high standards, intermediate 1, intermediate 2, low-moisture, 22%, 18%, 14%, 10%);
2. Notes:
3. Pour all items into the transducer before calibration operation.
4. Do not shut down the instrument during the calibration process.
5. Carry out the calibration process in the order of low, medium, and high moisture value;
6. Select breed code: Press the”  or “ key to select the category code required for calibration (the originally labeled parameters in the breed will be overwritten);
7. Enter the calibration mode: long press the “Enter” button (about 5-6 seconds) and release after hearing the beep. It is indicated that the instrument has entered the calibration mode, and put in the first standard sample;
8. Mark the low moisture calibration: take the standard sample with low moisture and put it in the transducer through the filling tube, wait for the display measuring result (such as 11%), and then press “ or “  to change the displayed value into standard value (such as 10%). Then click the “Enter” button to save the modified result. The instrument flashes 10%, indicating that the first point calibration is done; as shown below:
   • Tip: First point calibration error correction can also be used as a method for error correction; if shutdown and exit now, it is equivalent to the completion of the error correction.
9. Mark the second point: pour out the standard sample with low moisture, the instrument displays; and put in the second standard sample as indicated; complete the calibration operation for the second point as indicated in step 5;
10. Continue the calibration operation: Continue the calibration operation as shown in the above methods; after finishing the Continue the calibration operation for the fourth standard sample, the instrument will exit Continue the calibration mode matically; if the third or fourth standard sample does not exist, press “Breed” button and exit the Continue the calibration mode;
11.  Re-test the standard sample: Re-test the standard sample; if the measured error is 50.5%, it means that the calibration is successful; If the error is too large, it needs to be re-calibrated.

Restore the factory calibration data

• If the user wants to reset the default calibration data of the instrument in the factory, he can operate it according to the following methods:
• Select the category code needed to reset, press the “Enter” button, and release after hearing the beep.
• Then press the “Breed” button and release until hearing the beep.
• The instrument flashes, indicating the default parameters have been reset. Shut down and exit the reset mode.

Status indication

• The instrument has a power-on self-test function, which will show the appropriate indicators according to different modes, shown as follows:
• E-1: indicates the moisture transducer fails or there is a sample inside, the instrument shall be poured or needed to repair;
• E-1, E-2, E-3: represent the water, temperature, and weight circuit failure;
• db1: indicates that the moisture value difference between samples during calibration is less than 1%;
• db2: indicates that there is an error in the moisture low-high order of moisture value during calibration
• A flashing battery sign appears on the top of the left corner: indicating low power in the battery which needs to be replaced;
• The battery symbol and the word “U-L” appear simultaneously: indicating that the battery runs out and needs to be replaced immediately;
• indicating that the weight self-test fails, which shall operate or conduct maintenance under “Maitenance3 indicating that the sample quantity is too small.

Instrument ancillary functions (Reference use)

1. Mean value: when the instrument measures the same breed more than twice, the mean value measured several times before can be displayed.
2. Volume conversion: when the funnel is not installed in the filling tube attached, the volume is about 232 cubic centimeters (cc), which only needs to be measured during sampling and put the sample into the filling tube after leveled. When the moisture is shown, press without pouring out the sample, and then the sample volume is shown, where the unit is gram per Liter (g/L). Of course, the value is only for the convenience of on-site estimation. When the volume indicator is used for trading settlement and another occasion, the measurement result of an official volume-weight instrument shall prevail.

When measuring the volume weight, take out the sample by the following steps

1. Take out the sample with a charging barrel;
2. Remove the funnel on the filling tube;
3. Use the edge of the funnel to level the sample along the edge of the filling tube;
4. Prepare for measurement

The main technical indicators

• Measurement object: food and other non-metallic granular samples, such as rice, wheat, corn, soybeans, rice, rapeseed, etc.;
• Measurement error: ≤ £0.5% (main moisture range)
• Repeat error: ≤ 0.2%
• Measurement range :3-35%
• Measurement time: ≤ 10S
• Ambient temperature :0-40 C
• Power: Four AA alkaline batteries or external 6V DC power supply
• Display: Backlit LCD highlighted
• Subsidiary functions: Volume translated display, sample weight display, temperature display, mean moisture value calculation.
• Complete accessories: external AC power adapter, cleaning brush, manual, certificate and warranty card, filling tube, funnel, calibration weights each; four AA alkaline batteries.

Maintenance

1. The instrument belongs to a high-precision electronic instrument product which must be taken and put down gently, to avoid shock and moisture, and also must be placed horizontally when used and stored. It should be cleaned and maintained regularly;
2. The batteries should be removed when not used for long or during transportation.
3. Electronic Balance Calibration: If the instrument’s built-in electronic scale is inaccurate, calibration can be conducted according to the following methods.
   • a.Place the instrument horizontally in shutdown status and remove all things in the transducer. First, long-press the “Breed” key, then press the power button to start. The instrument will beep. Then release the “Breed” button and numbers are shown in the instrument indicating that it is in the balance calibration mode;
   • b.Press the “Enter” key again, and the radix point on the display flashes and shows 200g, indicating that 200g weight can be put on;
   • c. Gently place the fixed weight attached to the instrument (or 200g standard weight) on the clack tip in the center of the measurement transducer; then press “Enter” again.
   • After 200g is shown on the instrument, shut down and remove the weight.

Category Code Table for Preset Instrument Calibration Parameters

– 2 4  Optional

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