二、 Specialty & technical index
（一） technical index
　　　● Adopt industrial locale general line module in data collecting and the measuring error is less than 0.05%FS.
　　　● The longest distance between the tested meter and equipment and computer system can reach 1200m.
　　　● Monitoring and controlling time is less than 10s.
　　　● Digital communication way is RS485.
　　　● The most joint module number is 255.
　　　● The communication frequency is larger than 9600bps.
（二） Advantage
　　　● Chinese version guiding makes it simple.
　　　● All mouse operation saves troubles from keyboard.
　　　● One computer can monitor and control four machines at the same time.
　　　● Monitoring data and control situation can be printed
　　　● Owns time table which can be printed.
　　　● Mistake self-correcting ability can test situation of computer system and outside equipment (monitoring and control equipment).
　　　● Enter parameter set and adjust measuring, output, module address, and passage of the tested meter through pin.
　　　● Can correct the errors of tested meter and computer's number.
　　　● Can show printing curve and six ones meanwhile.
　　　● Single curve printing can be chosen while curve printing, and also can print all tested meter's history curves with one page.
　　　● Can shut off data collecting ability of meters while it stops.
　　　● The system passes the off line results towards items off line.
　　　● The major show can be switched among on line meter, off line meter and all testing items.
　　　● The picture shows vividly the control situation.
　　　● Software and hardware on watching ensure system working.
　　　● Other output ways and monitoring testing and controlling equipment can be joined in the system.
　　　● Support internet function and provide the related data to other computers through internet.
三、 Work Theory
　　See the affix
　　Switch computer system RS232C communication into RS485 communication through ADAM4520.
One to more communication is allowed. Can join 255 modules in the most and every module has the only address. The inside SCM is also working. The SCM works as old instruction while no new one appears. Data collecting module put power oppression of output point or signals of switching into module saving; the output module outputs according to the numbers in EMS memory.
　　If system tests one module, it will firstly test the locale general line busy or leisure: while leisure, it sends address and input open while output shut; when address of general line matching with some module, this module is ready to accept instruction and the system send one instruction, then shut ADAM4520 communication output. The related module will work after instruction and open output; send message back and finally shut output. The system receives feedback and work with the data.

四、 Module Explanation
（一） ADAM4520：RS232C、RS485 Switching module
　　The scheme of standard computer only provides RS232C communication entrance, which can only have one to one communication in short distance and not suitable for industry therefore it must be switched.
　　Except the one to more communication advantage, RS485 signal adopts comparing ways: at data sending end, one line in high power the other in low power; at data receiving end, it can judge the data state and have long distance passing, which the longest distance can reach 1200m.
　　Adopt standard double screen lines and the system transmitting frequency is 9600bps, 38.4kps in the most.
（二） ADAM4017: 6 minutes error, 2 single end switching module
　　ADAM4017 provides 6 separating input passage, ±16 in distinguishing rate, line errors less than 0.01%FS. The correcting range is: ±100mV,±1V,±5V,±10V，4-20mA. While choosing 4-20mA input, the input end must join a 250Ω accurate resistance better than 0.05%.
　　Can correct module address, correspondence speed and switch some passage.
　　In order to ensure the reliability and accuracy of the system, two single end input passage is generally not used.
（三） ADAM4052：8 passage separating switching input module
　　ADAM4052 provides 8 passages switching input. When the high power in, the pressure must between 3V and 12V; when the lower power in, the pressure must between -0.5V and 0.5V.。
　　Can correct module address, correspondence speed and switch some passage.
（四） ADAM4021：separating data switching module
　　ADAM4021 is single passage separating data switching module with the switching distinguishing rate of 12. It can set output: 4～20mA，0～20mA，0～10V through software and the largest bearing is 500Ω.
　　Module address and correspondence speed can be corrected through software.
（五） ADAM4060：our electronic appliance output module
　　ADAM4060 provides electronic appliance touching points output, two of which are often open points, other two of which are often switch point. The point content is 220V0.3A、24V1.5A.
　　Module address and correspondence speed can be corrected through software.
（六） Other modules
　　According to custom's need, the system can join other modules:
　　ADAM4013 module: single passage hot resistance collecting module can measure PT100, etc. directly.
　　ADAM4052 module: none separating switching input and output module can start LED directly and input No7 and output No.8.
　　ADAM4510 module: communication signal machine, communication cable can be extended 1200m when the first continuous machine added.
Note: in module explanation, some specialties maybe a little worse than modules in reality, because we consider the reliability.
五、 Connection
（一） Computer and ADAM4520
　　The entrance of RS232C is nine needles of D type and entrance of ADAM4520 is nine outlets. You can make nine cables by yourself to join computer and ADAM4520, which the cable length should be shorter than 15m.
　　We provide this cable.
（二） Module & power.
　　The work pressure of module is 10V-30V and usually DC24V provided. Since the signal is comparing one, a separate power supply should be prepared for disperse modules, which has no influence towards system correspondence.
（三） Correspondence cable joining
　　Although the cable joining way is equal connection, fork points should be lessened as possible to reduce noise, i.e. signal cable joins directly the end of module and out signal to other modules.
　　In order to ensure the stability of correspondence signal wave, it would better join a resistance in signal end with longer cable. The resistance number is after length of transmitting line and numbers of joint modules.
　　DATA- to DATA+，DATA- to DATA-。
（四） connection between module and meter or control equipment
　　Note the polarity of input and output ends. For input module, the normal pressure must be ensured or it will lead to module abnormal or even damaged internally.
六、 system station
　　1、Industrial computer: one set(the type and ability is based on custom's requirement.)
　　2、printer: one LQ1600K
　　3、continuous power supply : one UPS 1000W
　　4、Correspondence switching module: two ADAM 4520 (one for standby)
　　5、Data switching module: several ADAM 4017
　　　 According to user's collecting location and the other one for standby.
　　6、Separating switching input module: several ADAM 4052, stationed according to input points for those needed outside equipment state. The other one is for standby.
　　7、Data switching module: several ADAM 4021 based on control points. Other one for standby.
　　8、Continuous electric appliance input module: several ADAM 4060 based on control point. the other one for standby
　　9、Temperature collecting module: several ADAM 4013. If there is no input while testing temperature, this module can be used for testing directly with hot resistance and the other one for standby.
　　10、Switching input or output module: several ADAM 4052 based on input and output numbers of none separating switch quantity. the other one for standby.
　　11、Correspondence continuous apparatus: several ADAM 4510 based on length of cable and the other one for standby.
　　12、Expert double screen cable : several meters
　　13、network card : select
七、 work cycle
　　1、 Prepare one month and design primarily.
　　2、 One week for fixing.
　　3、 Two to three weeks for debugging.
　　4、 Seventy-two hours working.
八、 Others
　　The vapor testing and monitoring system we designed are based on custom requirement and several years debugging and operating experience and have essence models. The user can add or delete some functions in reality.