压力比重杯操作程序

八戒

This procedure is limited to the operation of the SG pressure cup as supplied by SHEEN
这个操作程序仅限于SHEEN实验设备公司提供的压力比重杯。

HEALTH AND SAFETY健康和安全

Carry out an assessment of the risks involved in handling the samples and chemicals used; refer to the relevant safety data sheets and suppliers’ literature. Record the details. Wear appropriate personal protective equipment. Work in accordance with local environmental and Health & Safety rules.
对危险进行评估包括使用过的样品和化学品的处理；参照相关的安全数据手册和供应商所提供的资料。试验中记录所有细节。穿好适当的个人防护用品。所有工作要符合当地的环境保护和健康与安全的法律法规。

When pressuring the cup, wrap folded tissue or waste cloth loosely around the pressure release cap to prevent hazard from the discharging fine spray to personnel or surrounding.
在压紧比重杯时，用织物或废布料将压紧盖裹严，以防有害油漆喷洒到人身上或周围环境。

八戒

PROCEDURE
操作程序

This SOP should be used in conjunction with the manufacturers operating manual and the relevant SMT’s.
这个操作程序是结合制造商的操作手册和相关的SMT标准而产生的。
PREPARing
试验准备
APPARATUS
准备设备：
Pressure density cup(calibrated for use at 23±2℃). Thermometer. Constant temperature cabinet maintained at 23±2℃. Lab. balance. Platte knife.
压力比重计（已校正）；温度计；23±2℃的恒温室；试验室天平；调漆刀
MATERIALS
准备材料：
A representative sample of the product for test. Solvent and appropriate cleaning materials.
待测油漆样品；清洗溶剂
1.        Warm, or cool, he test sample to approximately 23℃ and place, with the pressure density cup, in the controlled-temperature cabinet until ready for testing.
将待测样品加热或冷却至23℃左右，连同压力比重计放置于恒温室等待试验。
1.        Check that the cup it is perfectly clean and dry. Apply a small amount of grease to the piston and end seals to facilitate easy assembly of the cup. 检查确保比重杯完全清洗干净并干燥。在活塞和密封盖上涂上少量润滑剂。
2.        Weight the dismantled cup to at least two decimal places-Record this as M1. 用天平称出空的比重杯重量记为M1。
3.        Fit the plunger in the barrel with the crossbar engaged in the bayonet socket. Withdraw the plunger as far as possible by unscrewing anti-clockwise to the maximum extent. 把活塞装入带卡口的杯体中，之后按逆时针方向松开卡口底座螺丝将活塞经可能地拔出到最大体积。
4.        Hold the cup vertically and pour in the test liquid until the cup is nearly full. Close the cup by fitting the pressure release cap, engage the stirrup assembly and screw down until it reaches the stop. 将比重杯竖放，倒入待测液体直到杯子将近满。通过压紧降压盖密封比重杯，挂上挂钩将降压盖旋至最底。
5.        Compress the liquid by turning the pressure-application handle clockwise to its full extent. During this process, a small amount of paint is forced the cup and the pressure-release. 顺时针方向旋动压力扶手将活塞推至最底，通常在此过程中回有部分油漆被挤出。
6.        Clean away all paint from the extent of the cup, dry and weigh. Record this as M2.清洗去挤出的油漆后擦干比重杯。称量并记下数字为M2。
7.        Unscrew the pressure-setting handle and remove the pressure release cap. Pour the contents of the cup back into the test sample container and wash the complete density cup with the
appropriate solvent cleaner.
      M2  –  M1        
Volume of cup in millitres
10.
Calculate the Density=    grams per millilitre ( = kg/l)
NOTE: the volume of the cup is 100ml, so Calculate the Density=(M2-M1)/100 grams per millilitre ( = kg/l)