I. Overview
The MHY-26775 bacterial turbidity meter is mainly used to measure the turbidity of bacteria. Measure the degree of scattering of light produced by bacteria and quantify the amount of these bacteria.
Two uses
Can be widely used in the pharmaceutical industry, epidemic prevention departments, hospitals and other departments of the measurement of bacterial Meek turbidity.
Three instrument features
1. Microcomputer system configuration, touch keyboard.
2. Large and bright backlit LCD display, which clearly displays the date, time, measured value and unit of measurement, and is not affected by ambient natural light.
3. Built-in clock memory storage system, storing calibration data, can be used for a long time.
4. The unit of measurement for the MHY-26775 bacterial turbidity meter is: MCF. (It is recommended that users do not arbitrarily modify the unit of measurement because other units of measure are converted differently). Our factory turbidity meter series instruments are pre-equipped with a variety of measurement and measurement units such as NTU, EBC, mg/L, %, etc., which can be widely applied to the needs of various industries.
5. Accurate optical system and reliable positioning structure to improve measurement accuracy and repeatability.
6. Long-life high-intensity light source, maintenance-free use time up to 100,000 hours, in line with ISO turbidity measurement standards.
Four technical indicators
model
MHY-26775 bacteria turbidity meter
Minimum resolution (MCF)
0.01
Measuring range (MCF)
0～6.00MCF (Mc turbidity unit)
Range: 0-1 MCF; 0-6 MCF
Linearity error (accuracy)
≤3.0%FS
Repeatability
≤1.5%
Sample tube size requirements
15mm in diameter; height 85mm~100mm
Sample volume
The minimum sample size is not less than 3ml
Power supply
220V±22V 50Hz 35W
Storage environment
Temperature -25 ~ +55 ° humidity <85%
Five considerations
The MHY-26775 bacteria turbidity meter is a precision measuring instrument that combines photoelectricity. Read the instruction manual carefully before operation and obtain accurate measurement results by correct operation.
a, the use of the environment must meet the working conditions.
b. The measuring room must be clean and dry for a long time without dust.
c. For humid climate use, the boot time must be extended accordingly.
d. Non-professional maintenance engineer, please do not open the instrument for maintenance.
Six working conditions
a, ambient temperature: 5-35 ° C;
b, relative humidity: no more than 80% RH;
c. Power supply voltage: 220V±22V Frequency: 50±0.5Hz, and has good grounding;
d. The instrument should be placed horizontally on a stable test bench to effectively avoid direct light;
e. There should be no strong vibration sources and strong magnetic field interference around the instrument;
f. There should be no obvious dust and corrosive gas in the surrounding air.
g, the warm-up time is 1 minute.
Seven keyboard function description
Shift key "<": A digital shift in the correction. (Note: the digital increment key during time adjustment can be cycled);
The direction key “∧â€: the up-and-down of the menu and the increment of the calibration value during the calibration (Note: use this button to shift forward when adjusting the time);
Zero key: Zero the sterile distilled water;
Calibration key: Calibrate the standard turbidity value;
Set button: enter the setting state and confirm the selection of the menu;
Average key: Calculate and display the average value of the measured data;
Eight menu parameter function table
1. Menu directory description:
MENU menu
Parameter range
unit
Factory
Setting
* Measure
(Range range setting item)
0~1.00MCF
0~6.00MCF
MCF
/
* Speed
Sample rate setting item
The sampling rate is divided into: 20/S, 15/S, 10/S, 5/S, 2/S, 1/S, and 6-speed options.
Times/second
5/S
* Times
Sample count setting
The number of samples is divided into: 2 Timers, 5 Timers, 10 Timers,
20 Timers, 50 Timers
Times
20 Timers
* Time
Average sampling time setting
The average sampling time is divided into: 10S, 20S, 30S, 60S, 120S five gears.
second
10S
* Unit
Unit of measure setting
Eight units such as MCF and NTU can be selected.
/
MCF
* Timer
Time adjustment setting item
Time adjustment setting
/
/
Nine measurement instructions
Measurement preparation:
4. Turn on the working power, turn on the power switch on the back side of the instrument, and warm up the instrument for 1 minute. The display shows “Welcome!†in English and flashes.
After the system is warmed up for 15 seconds, it automatically enters the real-time measurement state, displaying the time, the range, the real-time measurement value and the measurement unit.
example:
5. After gently shaking the sample tube with the sample (be careful not to generate air bubbles), put it into the measuring cell, and try to ensure that the calibration line of the sample bottle should be aligned with the positioning line on the sample holder, and then cover Light-shielding cover.
The instrument automatically displays the turbidity of the sample being measured in real time, and the range and time of the sample.
Note: M1: Abbreviation for the current measurement value in the range of range 1.
0.80: is the current measured value
MCF: is the turbidity unit
If the sample turbidity particles are not uniform, the measured value is unstable. By pressing the average button, the instrument automatically calculates and displays an average value.
Note: A1 is the abbreviation for the average measured value within the range of range 1.
The instrument automatically selects the appropriate range based on the turbidity of the sample being measured.
Press the average button again and the instrument returns to the real-time measurement state.
Ten instrument calibration and parameter setting instructions
The instrument has a calibrated data memory function and generally does not require frequent calibration of the instrument.
Prepare the sterile distilled water for zero calibration and prepare the calibration turbidity standard solution before calibration.
First, start, warm up
Turn on the working power, turn on the power switch on the back side of the instrument, and warm up the instrument. The display shows “Welcome!†in English and flashes.
After the system warms up for 15 seconds, it automatically enters the measurement preparation state and displays the current time.
1. Enter the instrument calibration settings
Press the SET button once in the measurement state to enter the menu state.
Press the SET button again to enter the instrument calibration state.
Note: 00 indicates the number of calibration points.
(When displayed as 00, the instrument calibration data has been cleared and must be calibrated before use)
M1 is the abbreviation of range 1.
1.0 is the calibration set value
(If necessary, you can modify the calibration value by pressing the “<†“∧,†button)
[1] full scale value for this range
**** Input signal value for the sample (data used in the manufacturer's production process)
**** MCF is the measured value and unit
a zero
Place the prepared sterile distilled water sample bottle in the measuring chamber, align the scale line of the sample bottle with the positioning line on the sample holder, and then cover the light-shielding cover. After the displayed value is stable, press the zero button. Zero the displayed measured value.
(Warning: After pressing the zero key in the calibration state, the data originally calibrated by the instrument will be cleared.)
b correction
After the zero adjustment, the sterile distilled water sample bottle was taken out, and the McGee turbidity standard solution such as 0.5MCF and 1.0MCF was separately calibrated by the same method. (It is also possible to calibrate only the calibration points near the sample being tested) and to calibrate from low turbidity to high turbidity. The displayed measured value is made to match the Maxwell turbidity standard liquid value.
Press the SET button again to enter the instrument calibration state.
Note: 00 indicates the number of calibration points.
(When displayed as 00, the instrument calibration data has been cleared and must be calibrated before use)
M2 is the abbreviation of range 2.
6.0 is the calibration set value
(If necessary, you can modify the calibration value by pressing the “<†“∧,†button)
[6] Full scale value for this range
**** Input signal value for the sample (data used in the manufacturer's production process)
**** MCF is the measured value and unit
a zero
Place the prepared sterile distilled water sample bottle in the measuring chamber, align the scale line of the sample bottle with the positioning line on the sample holder, and then cover the light-shielding cover. After the displayed value is stable, press the zero button. Zero the displayed measured value.
(Warning: After pressing the zero key in the calibration state, the data originally calibrated by the instrument will be cleared.)
b correction
After the zero adjustment, the sterile distilled water sample bottle was taken out, and the McGee turbidity standard liquids such as 1.0MCF, 2.0MCF, 3.0MCF, 4.0MCF, 5.0MCF, etc. were successively calibrated in the same manner. (It is also possible to calibrate only the calibration points near the sample being tested) and to calibrate from low turbidity to high turbidity. The displayed measured value is made to match the Maxwell turbidity standard liquid value.
Press the SET button again to return to the measurement state.
(This instrument calibration is completed)
2.Speed ​​(sampling rate setting item)
In the measurement state, press the setup button once to enter the menu state, and select the Speed ​​(sampling rate setting item) by pressing the “∧†key.
Press the Setup button once again to enter the sampling rate selection. Press the “∧,†button to select the corresponding sampling rate.
The sampling rate is divided into: 20/S, 15/S, 10/S, 5/S, 2/S, 1/S, and six files.
Press the SET button or the ENTER/PRINT button again to return to the measurement state.
3.Times (sampling times setting item)
In the measurement state, press the setup button once to enter the menu state, and press the “∧,†button to select the Times (sample count setting).
Press the setup button once again to enter the sampling times selection. Press the “∧,†button to select the corresponding sampling times.
The number of samples is divided into: 2 Timers, 5 Timers, 10 Timers, 20 Timers, 50 Timers
Press the SET button again to return to the measurement state.
4.Time (average sampling time setting item)
In the measurement state, press the setup button once to enter the menu state, and press the “∧†button to select Time (average sampling time setting item).
Press the setup button once again to enter the average sampling time selection. Press the “∧,†button to select the corresponding average sampling time.
The average sampling time is divided into: 10S, 20S, 30S, 60S, 120S five gears.
Press the SET button again to return to the measurement state.
5.Unit (unit of measure setting)
In the measurement state, press the SET button once to enter the menu state, and press the “∧†button to select Unit (Unit of Measurement Settings).
Press the setup button again to enter the measurement unit selection. Press the “∧,†button to select the corresponding measurement unit.
Eight units such as MCF, NTU, and EBC are available.
Press the SET button again to return to the measurement state.
Users should not arbitrarily modify the unit of measurement because some turbidity units are converted differently.
6.Timer (time adjustment setting item)
In the measurement state, press the SET button once to enter the menu state, and press the “∧†button to select the Timer (time adjustment setting item).
Press the Set button again to enter the time adjustment state. Adjust the date and time by pressing the “<†“∧,†button.
Press the SET button again to return to the measurement state.
※ Note:
Error code hint
OVER MEASURE: Indicates that the measured value is outside the range of the instrument.
Eleven measurement techniques
In order to obtain accurate turbidity measurements, in addition to the excellent quality of the instrument itself, it also depends on the laboratory technician's good operational skills and serious and rigorous work attitude. If you use clean sample bottles, the correct method of operation, and ensure the working conditions of the instrument, the measured results will be more accurate.
a, the sample bottle must be cleaned very cleanly to avoid scratches and scratches. The inside and outside of the sample bottle were washed with a laboratory detergent, then repeatedly rinsed with distilled water, and dried in a dust-free dry box. If it is used for a long time, it can be soaked in dilute hydrochloric acid for two hours, and finally rinsed repeatedly with distilled water. Only take the upper part of the bottle when taking the sample bottle to avoid fingerprints entering the light path.
c. Very accurate preparation of the Maid turbidity standard solution is an important technique for turbidity measurement. Ensure that the calculation is correct, pay attention to each step of preparing the standard solution, shake the stock solution evenly, and accurately pipette to reduce the preparation error. The Mai's turbidity standard can be purchased directly.
d. When measuring, not only the cleaning of the sample bottle but also the consistency of the measurement position should be considered. The scale line of the bottle should be aligned with the sample holder positioning line and need to be covered with a light-shielding cover to avoid stray light effects.
Twelve maintenance and overhaul
maintain:
Proper measurement and regular maintenance can effectively extend the life of the instrument.
1. In case of long-term deactivation, it should be pre-heated for a period of time to facilitate the removal of moisture in the machine.
2. During storage and transportation, avoid high temperature and low temperature and humidity to prevent damage to the optical system and electrical components inside the instrument.
Overhaul:
Fault phenomenon
possible reason
Maintenance method
1. No display after booting
1. The power cord is not in good contact or loose with the socket.
1. Fasten the socket or replace the power cord
2. Measurement no reflection
1. Light source lamp is damaged
2. The internal connector is loose
3. Electrical system failure
Replace
2. Sturdy
3. Overhaul
3. The display lacks strokes
1. LCD display is damaged
2. Display circuit board failure
Replace
2. Overhaul
Warranty matters:
The user operates in accordance with the method specified by the instrument. Within one year from the date of purchase, the manufacturer may be damaged or unable to work due to manufacturing quality problems. The manufacturing factory is responsible for repairing the user for free, and the equipment is damaged due to improper use of the user. The spare parts and labor costs will be charged accordingly, and the warranty factory will be responsible for lifetime maintenance.
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