Floating air dust sampler experimental method
Floating air dust sampler experimental method
The dust-carrying air passes through the micropores at a high speed and is evenly impacted on the surface of the agar in the culture dish; these living microorganisms obtain uniform and sufficient nutrition on the surface of the agar, and during the cultivation process, the dynamic rehydration process occurs rapidly, and the high-speed growth is obtained. result.
Instructions
1. Remove the porous sampling head, place the culture dish with a diameter of Φ90mm on the culture dish holder, adjust the culture dish to a basic level, and adjust the positioning rod so that the alignment line on the positioning rod is in the same state as the culture medium. On the horizontal surface, the porous sampling head is installed.
2. Turn on the power switch, the display screen displays the last sampling data and sampling time. Press the up or down button to view the historical data in the memory. Press the “Stop†button to enter the sampling preparation state. The current date and time, the sampled value shows zero.
3. Remove the “protective coverâ€.
4. Press the “Sampling†button to enter the sampling state, and start the sampling pump and counter according to the delay time. At this time, the sampling amount is gradually increased until it is equal to the set sampling amount, automatically stop counting, turn off the sampling pump, and the current sampling amount. And the date time is saved in the internal memory.
5. Press the “Stop†button in the sampling operation state to terminate the sampling operation, turn off the sampling pump, stop the accumulation of sampling amount, and press the “Stop†button again to clear the current display and enter the sampling preparation state.
Set as follows:
(1) Sampling amount setting: Press the up and down keys in this state to adjust the sampling amount. The sampling amount ranges from 10 to 6000 liters, the adjustment step is 10 liters, press the “Stop†button to exit the parameter setting, and press “Functionâ€. The key goes to the next parameter setting.
(2) Sampling delay time setting: Press the up and down keys in this state to adjust the sampling delay time. The sampling delay time range is 0-3 seconds, the adjustment step is 1 second, press the “Stop†button to exit the parameter setting, press The “Function†button goes to the next parameter setting.
(3) backlight delay time setting: press the up and down keys in this state to adjust the backlight delay time, the backlight delay time range is 0-256 seconds, the adjustment step is 1 second, press the “stop†button to exit the parameter setting, press The “Function†button goes to the next parameter setting (Note that this instrument has no backlight).
(4) Contrast adjustment: Press the up and down keys in this state to adjust the contrast of the LCD display. The contrast range is 0-3. Press the “Stop†button to exit the parameter setting and press the function button to enter the next parameter setting.
(5) Date setting: Press the up and down keys in this state to adjust the date of the current cursor position, press “Enter†to change the position of the cursor, press “Stop†to exit the parameter setting, press “Function†to enter Next parameter setting.
(6) Time setting: Press the up and down keys in this state to adjust the time of the current cursor position, press “Enter†to change the position of the cursor, press “Stop†to exit the parameter setting, press “Function†to enter Next parameter setting.
(7) Timing start: In this state, press the up and down keys to open or close the timed start, press the “Stop†key to exit the parameter setting, and press the “Function†key to enter the next parameter setting.
(8) Timing time: In the state where the previous state “Timed Start†is on, you can set the time for starting the time. The method is the same as “Time Settingâ€, press “Stop†to exit the parameter setting, press “Function†to enter Next parameter setting.
(9) Sampling amount correction: Press the up and down keys in this state to adjust the sampling amount correction value, that is, the measured flow rate per minute. The calibration range is 20-200 liters/min, the adjustment step is 1 liter/min. Press the “Stop†button to exit the parameter setting, and press the “Function†button to enter the next parameter setting.
(10) Clear setting: Press the up and down keys to adjust the clear state in this state. Pressing the “confirm†button in the clear state will clear the historical data in the memory and exit the parameter setting state, press “Stop †to exit the parameter setting, press “Function†to enter the next parameter setting.
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