YH-40Bç ¼ cement standard maintenance box use and maintenance

YH-40Bç ¼ cement standard curing box is suitable for the standard maintenance work of strength and setting condensation time of cement and concrete samples by various construction sites and scientific research and quality inspection departments.
YH-40Bç ¼ cement constant temperature and humidity maintenance box (Zhangzhou Tianjian) is designed and manufactured according to the standard maintenance requirements of concrete test pieces of national construction industry JG3037-1996.
It is applicable to the standard maintenance work of strength and setting condensation time of cement and concrete samples by various construction sites and scientific research and quality inspection departments.
Standard maintenance box for concrete (cement)|Main technical parameters of 40B maintenance box Temperature control accuracy ±0.3°C Temperature measurement accuracy ±0.5°C Temperature inside the box 20°C
Heating power 500W temperature difference <±1°C
Machine noise <65dB working voltage 220V±10%
Control humidity accuracy ±1% RH Relative humidity ≥92RH
Humidity measurement ±3%RH Frequency 50HZ
Compressor power 158W temperature and humidity sensor Pt100A grade volume: 90B type 1700 × 500 × 1200mm (cement test block 80 sets)
40B type 600×500×1180mm (40 sets of cement test blocks, 15 sets of concrete test blocks)
60B type 580 × 1200 × 1400mm (砼 test block 18 groups)

Instructions for use
1. Place the instrument in a ventilated and dry environment, and leave it 50 cm or more away from the wall to ensure that the door switch is flexible.
2. Add water to the water tank to the last shelf (electrical heating tube 2-3 cm).
3. Fill the humidity sensor with 90% water.
4. Remove the upper tank of the humidifier and add water to the bottom of the tank (must be distilled water).
5. Plug the plug into a 220V outlet that has a good grounding.
6. Adjust the values ​​required for the temperature and humidity controller button settings.
7. Press the power supply and the instrument will enter the working state.

Use and operation:
After checking the wiring is correct and the power supply voltage is normal, the instrument power is turned on, the meter is powered on and reset, and it enters the working state, and the temperature, humidity and humidity are measured, displayed and controlled.
1. Dry temperature and wet temperature display Under normal working conditions, the humidity window displays the ambient humidity at that time, the temperature window displays the dry temperature, the humidity setting window displays the humidity to be controlled, and the upper limit setting window displays the upper limit of the control temperature. The fixed window displays the lower limit of the control temperature. When you need to look at the wet temperature, press the "â–²" button. At this time, the humidity window displays "T2", indicating that the temperature window displays the humidity at this time, and then press the "â–²" button. At this time, the humidity window displays "U", indicating At this time, the temperature window displays the power supply voltage, and then press the "â–²" button or 15s without pressing the button to return to the original state.
2. Setting of working parameters Before leaving the factory, the parameters of the instrument have been set to the temperature control value of 20.0±1°C and the humidity control value of 92%±2%. Therefore, it can work normally when it is turned on. If you need to modify, please refer to the steps.
When the meter is in the working state, press and hold the "Settings" button for about 5s to enter the setting state. Press the "Exit" button to exit the setting state and return to the working state. Pressing the "Settings" button continuously will display the parameters in turn. If you want to display or modify the specific value of a parameter, after displaying the parameter, press "â–²" to modify the parameter. Right now, right The first bit flashes, you can press the "â–²" button to set the number. After the modification is completed, press the "?" button to flash the second digit. Use the "â–²" button to modify it until you correct each bit correctly. If a bit does not need to be modified correctly, press the "?" key to skip this bit and go directly to the next one.

YH-40Bç ¼ cement constant temperature and humidity maintenance box maintenance and maintenance:
1. The instrument should be used in an environment that avoids acid, alkali, salt and severe vibration.
2. Always check all wiring of the instrument, which should be reliable, not loose, and rusted.
3. The gauze used in the humidity sensor is replaced in time.
a. Gauze application special humidity gauze or skim gauze.
b. Wash your hands before changing cloth.
c. The gauze package does not exceed one and a half times of the humidity sensor. The cotton thread is drawn from the gauze and knotted at the head and the tail. There must be no gap between the gauze and the humidity sensor.
d. The humidity sensor uses distilled or purified water in water, and the other end of the gauze wrapping the sensor should be submerged in water.
e. After using for a period of time, or the sink or gauze is dusty, oily, etc., it should be cleaned and replaced in time, otherwise the humidity value will be higher.
4. The temperature and humidity sensors should be installed in a well ventilated environment. If there is no wind in the use, consider installing a fan with appropriate power. The poor ventilation will make the humidity value high. Pay attention to check the fan regularly to ensure its normal operation.
5. If the instrument displays or the keyboard operation is incorrect and a beep sounds, the power can be turned off and restarted. If it is still abnormal, the technician should be inspected (mainly check whether the voltage is normal, such as abnormal voltage, automatic protection, user A regulated power supply should be installed).
6. If there is a major fault, return to the factory for repair.
Precautions:
1. The instrument is placed in a stable and reliable grounding.
2. The water in the box must not be cut off during work.
3. The fluctuation of the instrument within the set temperature ±1 °C is not a malfunction.
4. The regulator should be used when the power supply fluctuates by more than ±10%.
5. The tilt of the instrument must not exceed 45 degrees under any circumstances.
Troubleshooting:
1. The power indicator does not light, indicating that the power supply has not entered the instrument. If it is determined that the external power supply is normal, check whether the switch is intact.
2. The temperature inside the box is low. The heating indicator is not bright. Check whether the contactor has electricity or whether the contactor is ablated. If the indicator is bright and the temperature inside the box is low, the heating tube is broken.
3. The temperature inside the box is high and the cooling indicator is not bright. Check whether the wiring between the temperature controller and the refrigeration system is off. If the indicator light is on, check whether the overload protector starter is in good condition. If the inspection is normal, the compressor will be replaced.
4, the temperature difference inside the box is large, check whether the fan works, if the cooling indicator is bright and the fan does not work, the fan is damaged. Through the above inspection, in addition to the failure of the refrigeration system, it needs to be sent to the maintenance department for repair, and the rest of the faults can be repaired by themselves.
5. After using for a period of time, the box should be rinsed once to ensure the studio is clean.
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