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Curing box for dry shrinkage test of mixed mortar

Specification and model: JBY-30B

1、 Application of curing box for dry shrinkage test of mixed mortar

The curing box for dry shrinkage test of mixed mortar is applicable to the standard curing of mortar specimens made by scientific research and quality inspection departments, highway engineering units, construction units and cement product factories.

2、 Characteristics of curing box for dry shrinkage test of mixed mortar

This product adopts advanced intelligent temperature and humidity control system, which can accurately command the functions of heating, cooling and humidification. Carry out full-automatic switching, realize the dynamic balance of temperature and temperature in the box, and install automatic timing printer. So as to improve the accuracy and automatic control level of standard curing conditions, reduce energy consumption, and realize the state adjustment of test pieces and the standard environment of test.

3、 Main technical parameters of curing box for dry shrinkage test of mixed mortar

◆ temperature control accuracy: ± 1 ℃

◆ power supply voltage: 220V ± 10% 1500W

◆ temperature in the box: 20 ℃

◆ heating power: 800W

◆ humidity measurement accuracy: ± 3% RH

◆ dehumidification power: 180W

◆ humidity control range: 60-95% RH

◆ refrigeration power: 180W

◆ working dimension: 550mm long × 550mm wide × 1150mm high

◆ volume: 700mm long × 970mm wide × 1480mm high

4、 Working principle of curing box for dry shrinkage test of mixed mortar:

The instrument adopts precision platinum resistance PT100 as the temperature sensing element. The dry and wet equivalent voltage signals transmitted by the multi-channel switch are converted into corresponding digital signals by the high-performance (A / D) converter, and then processed by a single-chip microprocessor for display and control. When the temperature is lower than the lower limit of the set temperature setting value, the instrument outputs the refrigeration control signal; When the temperature enters the window area of the set control value (CER setting area), the instrument stops heating or cooling and enters the constant temperature state. When the humidity is lower than the lower limit of the set control value, the instrument outputs the humidification signal; When the temperature is higher than the upper limit of the set humidity control value, humidification stops.

5、 Instructions for curing box of dry shrinkage test of mixed mortar

1. The instrument shall be placed in a ventilated and dry place and used indoors where the ambient temperature is 2-38 ℃, the relative humidity is no more than 85%, and there is no strong vibration and strong electromagnetic field around.

2. After the instrument is placed stably, check whether the door switch is flexible and whether the electrical, refrigeration and other components are damaged.

3. Open the side door, fill the water tank of the humidifier with distilled water or purified water, fill the plastic water cocoon at the temperature sensor with water, and soak the gauze in the water.

4. See that the power plug is inserted into the 220V socket with good grounding, turn on the power switch and dehumidification switch, and the instrument will automatically enter the working state.

5. When leaving the factory, the instrument has been programmed into the standard setting procedure. The temperature control value is 20 ℃± 1 ℃ and the humidity control value is 60% ± 2%. If you need to change the control value data, you can modify the parameters according to the instructions of the temperature controller.

6、 Dry shrinkage test of mixed mortar and test of curing box

Whether the humidifier of the refrigerator can work, the head of the dry temperature sensor can be artificially heated to 5-10 ℃ higher than the set temperature, which can increase the temperature difference between dry and wet, and the refrigerator and humidifier will start working immediately.

7、 Precautions for curing box of dry shrinkage test of mixed mortar

1. If the fluctuation of power supply voltage exceeds the specified application range, a power regulator must be installed, otherwise the instrument and refrigerator will be damaged.

2. The power grounding must be reliable. Poor grounding will bring danger to your personal safety.

3. Check the humidifier frequently, do not cut off water in the dry and wet box, and replace the gauze in the box every month.

4. Non relevant personnel shall not change the control program data without authorization, so as not to cause the instrument out of control and damage the instrument.

8、 General troubleshooting of curing box for dry shrinkage test of mixed mortar:

1. The whole machine does not work: check whether the power switch and fuse are damaged.

2. Non refrigeration: check whether the instrument shows refrigeration status, check whether the compressor overload protector and starter are damaged, and whether the compressor can operate normally without refrigeration, which may be refrigerant leakage.

3. Non humidification of humidifier: check whether the small fan in the humidifier works, whether the water level in the base of the humidifier is too high, whether the humidifier is placed with too large inclination, and whether the atomization transducer is clean.

4. Occasionally, due to the impact of external electrical signals, the digital display of the instrument is out of control. Just turn off the power switch or unplug the power plug and restart it to work normally.

9、 Packing list of curing box for dry shrinkage test of mixed mortar

1. Host: 1 set

2. Shelf: 6

3. Instruction manual: 1 copy

4. Certificate of conformity: 1 copy

混合膠砂干縮試驗養護箱

規格型號：JBY-30B

一、混合膠砂干縮試驗養護箱用途

混合膠砂干縮試驗養護箱適用于科研質檢部門、公路工程單位、建筑施工單位、各水泥制品廠作膠砂試件的標準養護。

二、混合膠砂干縮試驗養護箱特點

本產品采用先進的智能化溫濕度控制系統，能準確地指令升溫，降溫和增濕等功能。進行全自動切換工作，實現箱內溫度，溫度的動態平衡，并可安置自動定時打印機。從而提高標準養護條件規定的準確度和自動化控制水平，降低能耗，實現試件的狀態調節和試驗的標準環境。

三、混合膠砂干縮試驗養護箱主要技術參數

◆控溫精度：±1℃

◆電源電壓：220V±10%1500w

◆箱內溫度：20℃

◆加熱功率：800W

◆測濕精度：±3%RH

◆抽濕功率：180W

◆控濕范圍：60-95%RH

◆制冷功率：180W

◆工作尺寸：長550mm×寬550mm×高1150mm

◆體積：長700mm×寬970mm×高1480mm

四、混合膠砂干縮試驗養護箱工作原理：

本儀表采用精密鉑電阻Pt100作為感溫元件，由高性能（A/D）轉換器將由多路開關傳送來的干、濕等效電壓信號轉換成相應數字信號，再由單片微處理器進行處理后顯示及控制。當溫度低于設定的溫度設定值下限時，儀表輸出制冷控制信號；當溫度進入設定控制值的窗口區域（CER設定區域）時，儀表停止加熱或制冷，進入恒溫狀態。當濕度低于設定的控制值下限，儀表輸出加濕信號；當溫度高于設定的濕度控制值上限時，加濕就停止。

五、混合膠砂干縮試驗養護箱使用說明

1、應將儀器置于通風干燥處，在環境溫度2-38℃，相對濕度不大于85%，周圍無強烈振動及強電磁場影響的室內使用。

2、儀器安放平穩后，應檢查箱門開關是否靈活，電氣、制冷等部件是否損壞。

3、把側門打開將加濕器水箱內加注滿蒸餾水或凈水，另把測溫傳感器處的塑料水繭內注滿水，并把紗布泡入水中。

4、見電源插頭插入具有良好接地的220V插座中，打開電源開關及抽濕開關，儀器自動進入工作狀態。

5、出廠時，本儀器已編入標準設定程序，溫度控制值為20℃±1℃，濕度控制值為60%±2%。如需要改變控制值數據，可按照控溫儀說明書修改參數。

六、混合膠砂干縮試驗養護箱試機檢測

制冷機加濕器能否工作，可以人為的給干溫傳感器頭部加溫至高于設定溫度5-10℃，這樣能使干濕溫差加大，制冷機，加濕器隨即開始工作。

七、混合膠砂干縮試驗養護箱注意事項

1、電源電壓波動超過規定使用范圍，必須安裝電源穩壓器，否則將會損壞儀表及制冷機。

2、電源接地一定要可靠，接地不良會對您的人身，安全帶來危險。

3、經常檢查加濕器，干濕盒內不要斷水，盒內紗布要每月更換。

4、非有關人員不能擅自改變控制程序數據，以免造成儀器失控及損壞儀器。

八、混合膠砂干縮試驗養護箱一般故障排除：

1、整機不工作：檢查電源開關，保險絲是否損壞。

2、不制冷：檢查儀表是否顯示制冷狀態，檢查壓縮機過載保護器，啟動器是否損壞，壓縮機能正常運轉而不制冷，可能是制冷劑泄漏。

3、加濕器不加濕：檢查加濕器內小風機是否工作，加濕器底座內水位是否過高，加濕器安放是否傾斜過大，霧化換能器是否干凈。

4、偶爾受外界電信號沖擊，儀表出現數顯失控，只需關閉電源開關或拔下電源插頭，再重新開機，即能正常工作。

九、混合膠砂干縮試驗養護箱裝箱單

1、主機：1臺

2、擱板：6個

3、使用說明書：1份

4、合格證：1份