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3.4.8 Communication Wiring

RS-485 connection method

The communication cable should be shielded twisted pair (the

communication length should not exceed 1000 meters), and one end of it
The other end is connected to the 485 communication terminal of the
instrument, as shown in the figure below.

RS-232C connection method

Users only need to connect one end of the RS-232C communication cable
to the RS-232C interface of the instrument.

The RS-232C communication connection can be realized by connecting

one end of the RS-232C communication cable to the RS-232C interface of
the instrument and the other end to the serial port of the portable machine
(or PDA), and the communication cable should be made of shielded twisted
pair cable and the length of the communication cable should not exceed 10
meters.

Summary of Contents for HT R71

Page 1: ...f the method before the specific operation to avoid unnecessary losses caused by wrong operation After you read it please keep it properly in the place where you can read it at any time so that you can refer to it when you operate it DISCLAIMMER The contents of this manual are subject to change without prior notice due to function and performance upgrades etc Reproduction or duplication of the con...

Page 2: ...ox Once you receive the product the quantity is wrong or there is physical damage in appearance please contact our company or sales outlet Ultra thin widescreen paperless recorder Mounting bracket 4pcs User manual Product Certificate of Conformity Warranty Card Data management software CD ...

Page 3: ...ixing 3 Instruction manual copy 1 4 Product certificate of copy 1 conformity warranty card 5 Data management sheet 1 software CD ROM 6 USB flash drive pcs Optional Accessorie s 7 RS 232C Root Optional communication cable Accessorie s 8 RS 232C 485 pcs Optional conversion module Accessorie s 9 Micro printer with table Optional power supply Accessorie s ...

Page 4: ... grounding and do not touch the terminals on the back of the instrument after the power is turned on to prevent electric shock Install the instrument indoors in a location with good ventilation to prevent high internal temperatures away from rain and direct sunlight and never in 1 Where the temperature and humidity exceed the operating conditions 2 Where corrosive flammable or explosive gases are ...

Page 5: ... same specifications and resistance value less than 10Ω otherwise it will cause measurement errors To prolong the service life of the instrument please perform regular maintenance and servicing Do not repair or disassemble the instrument by yourself When wiping the instrument please use a clean soft cloth do not dip it in alcohol gasoline and other organic solvents to clean it which may cause disc...

Page 6: ... 8 Communication wiring 19 Chapter 4 Basic operation and operation screen 21 4 1 Instrument keys 21 4 2 Usage modes 22 4 3 Status flags 23 4 4 General view screen 24 4 5 Bar graph screen 27 4 6 Real time curves 30 4 7 Historical curves 32 4 8 PID screen 34 4 9 Power down list 35 4 10 Power down list 36 Chapter 5 Configuration and Auxiliary Operations 38 5 1 Configuration Login 38 5 2 Configuration...

Page 7: ...apter 7 Service Guide 64 Appendix I Bit Number Configuration 65 Appendix II Flow rate calculation formula and meter coefficients 70 Appendix III Compensation Types and Commonly Used Gas Standard Density 71 Appendix IV Flow rate usage examples 73 Appendix V PID control loop application examples 75 Appendix VI Additional Customized Function Descriptions 76 ...

Page 8: ...onmental protection energy measurement food and oil tobacco and wine equipment manufacturing equipment sets and agriculture forestry animal husbandry and fishery industries Function Can support touch function additional function Can support dual communication function additional function Timing printing function can be supported additional function Can support DC power supply additional function C...

Page 9: ...p to store historical data the use of serial FRAM memory chip to store system configuration parameters and other key information Input function Input specifications fully isolated universal input maximum support for 16 analog inputs Voltage input 0 5V 1 5V 0 20mV 0 100mV Current input 0 10mA 4 20mA 0 20mA Resistance input Res 0 400Ω RTD PT100 Cu50 G53 Cu100 BA1 BA2 requires three wire resistance b...

Page 10: ...on printing Communication interface RS232C and RS485 two kinds of communication interface for users to choose support simultaneous use of RS232C and RS485 support simultaneous use of RS232C and RS232C support Modbus RTU protocol baud rate 1200 4800 9600 19200 38400 57600 Print interface RS232C directly connected to a micro printer baud rate 1200 Recording function Recording capacity 64 128 192 248...

Page 11: ...en ordering Protection function historical data permanently stored after power failure Clock protection integrated hardware clock accurate operation even after power failure Error accuracy Thermocouple cold end compensation error 2 Clock error 2 seconds day Working environment prohibited in flammable corrosive environment Operating temperature 0 50 avoid direct sunlight Relative humidity 0 85 R H ...

Page 12: ...al indicators are inconsistent with the physical instrument please take the physical object as the standard Chapter 3 Installation Wiring 3 1 Instrument size Note When the set meter is installed the minimum spacing between meters recommended in the above diagram should be referred to in order to ensure the necessary space for heat dissipation and loading and unloading ...

Page 13: ... Opening size Note When the set meter is installed the minimum spacing between meters recommended in the above diagram should be referred to in order to ensure the necessary space for heat dissipation and loading and unloading 3 3 Instrument Installation 注意 ...

Page 14: ...n be connected Note When installing this instrument please do not tilt it from side to side and try to install it horizontally it can be tilted back 30 3 4 Instrument Wiring 3 4 1 Wiring method It is recommended to use U type crimp terminals with insulating sleeve M3 screws for power and signal terminals To enhance the safety of the instrument observe the following warnings when wiring Note To pre...

Page 15: ...nce If this cannot be avoided please insulate the measurement object and the measurement circuit and ground the measurement object For the interference generated by static electricity it is better to use shielded wire For interference caused by electromagnetic induction it is better to connect the measurement circuit wiring in dense strands at equal distances If the input wiring is connected in pa...

Page 16: ...zero end of AC power supply the ground end is the positive end of DC power supply is the negative end of DC power supply please specify when ordering DC power supply Serial communication interface RS232C communication interface serial printing interface where pin 2 is RXD instrument signal receiving terminal pin 3 is TXD instrument signal sending terminal and pin 5 is signal ground terminal R1 R6 ...

Page 17: ... power input wiring Note The power input method at the project site must be consistent with the power input method provided by the instrument itself The power supply voltage at the project site must be limited to the withstand voltage range of the instrument ...

Page 18: ...ger support analog RTD thermocouple and other signals Other signals such as Pt1000 0 10V etc should be specified when ordering 3 4 6 Relay contact output wiring Note Wiring wire cross sectional area 0 5 2 5mm2 torque 50Nm The machine is shipped in normally open mode by default please specify other modes when ordering ...

Page 19: ...actory please specify when ordering 3 4 7 Transmitter Wiring Note The default 24VDC feeder is shipped from the factory please specify other specifications when ordering When the power consumption of the transmitter exceeds the feeder load capacity please use an external voltage regulator to supply power ...

Page 20: ...32C connection method Users only need to connect one end of the RS 232C communication cable to the RS 232C interface of the instrument The RS 232C communication connection can be realized by connecting one end of the RS 232C communication cable to the RS 232C interface of the instrument and the other end to the serial port of the portable machine or PDA and the communication cable should be made o...

Page 21: ...lug and unplug the communication cable with electricity if you need to operate please do so after the instrument power supply is turned off Chapter 4 Basic Operation and Operation Screen 4 1 Instrument keys Keyboard Functions ...

Page 22: ... 22 4 2 Usage Patterns ...

Page 23: ...ld the Menu Key and Confirmation Key simultaneously for 1 second or more to enter the configuration login screen Configurati on mode Input signal input range alarm parameters and other settings Various configuration parameters setting No measurement operation data is displayed 4 3 Status flags The following information is displayed in the status display section during operation mode and configurat...

Page 24: ... A Displayed The system has alarm generation B No display No alarm is generated by the system Data backup flag A Displayed USB is backing up data B No display USB is not backing up data 7 System printing flag A Displayed The micro printer is printing data curve B No display The micro printer is not printing the data curve Storage capacity flag A Green green is displayed when the used capacity is b...

Page 25: ...er Display the corresponding project bit number of the channel which can be freely configured Real time data Display the engineering measurement operation data of the channel if the current channel is in alarm status the measurement operation data turns red Data percentage the percentage of the current data in the total range Lower range limit user defined range range free to configure Upper range...

Page 26: ... function and press the F2 function key to switch back to the total view screen when it is in the flow monitoring screen the functions of the F1 F4 and F5 function keys are the same as the total view screen Press F3 to enter the grouping screen need to set the corresponding display combination first the display combination can be freely configured in Display Configuration maximum support 6 display...

Page 27: ...s flow rate operation value of the current channel Total Accumulated Value The total accumulated value of the flow rate of the current channel 4 5 Bar graph screen A single screen can display up to 16 channels of data bar graphs the number of channels varies while the display screen is different where 6 channels of data bar graphs are shown in the following figure introduced as follows ...

Page 28: ...raph indicates the percentage of current data in the total range and the filled area turns red when the system is in alarm Data percentage the percentage of the current data in the total range Upper range limit user defined range free to configure Lower range limit user defined range free to configure Unit display the engineering unit of the channel can be configured freely Relay status Display th...

Page 29: ...ported Each group supports 8 channels When you are in the grouping screen you can press F1 and F2 to switch the display combination press F3 to switch back to the bar graph screen F4 and F5 to switch to the bar graph screen The function of F4 and F5 is the same as the bar graph screen and the display combination in the grouping screen can be switched automatically in a cycle The display combinatio...

Page 30: ...e screen 4 6 Real time curve A single screen can display up to 8 channels of real time curves and data of which 6 channel screens are introduced as follows Relay status The current relay output status is displayed red is in alarm status green represents normal status black represents no corresponding relay Real time curve The displayed value of current measurement computation data corresponds to t...

Page 31: ... is equivalent to F4 function key operation Alarm status From left to right upper limit HH upper limit HI lower limit LO lower limit LL green indicates normal status red indicates over limit alarm Curve scale The percentage scale of the curve is displayed Display combination The current display combination number can be configured freely When all combinations are not configured the instrument will...

Page 32: ... data of which 6 channel screens are introduced as follows Time scale The length of time represented by each grid is related to the recording interval and the execution function is equivalent to the F3 function key operation Recall time Press Confirm after setting the corresponding recall time and date to perform fixed point recall Memories curve A period of history curve recorded by the instrumen...

Page 33: ...n all combinations are not configured the instrument will be combined in the order of channels 8 channels per group The display combination can be switched automatically in a cycle and the cycle automatic switching function can be configured freely in System Configuration Operation Press F1 or F2 to switch up or down to view the remaining combination curve data Press F3 to modify the time scale to...

Page 34: ...ade operation at the positioning axis where the cursor is located the cursor is at the position after the recall time and before the display fade flag 4 8 PID screen As shown in the figure below a single screen displays 1 channel PID control loop parameters curves and numerical bar graphs etc The screen is introduced as follows P proportional band coefficient value the larger the value the weaker ...

Page 35: ...ng value SV Set value MV loop output value Operation Press F1 or F2 to switch up or down to see the remaining loop curve data Press F3 to modify the time scale to toggle the display data or curve width per screen Press F4 to toggle the manual auto state pressing LEFT KEY or RIGHT KEY to move the cursor pressing Up key or Down key to adjust the data pressing Confirmation key to edit the data where ...

Page 36: ...on can be saved and up to 12 messages can be displayed simultaneously on a single screen Alarm channel The channel number that generates the current alarm information Alarm type the type of the current channel alarm upper limit alarm HH upper limit alarm HI lower limit alarm LO lower limit alarm LL Alarm Cancellation time red is the alarm time blue is the time of elimination not eliminated The dis...

Page 37: ...by page Press F3 or F4 to retrieve alarm information by bar Press F5 or Menu Key to turn the page to switch to the power down list screen 4 10 Power down list Up to 12 power down messages can be displayed on a single screen with the following screen description ...

Page 38: ...to 48 pieces of power down up time information can be saved and up to 12 pieces of information can be displayed simultaneously on a single screen Power down up time red is power down time blue is power up time Operation Press F1 or F2 to retrieve power down information by page Press F3 or F4 to retrieve power down information by bar Press F5 or Menu Key to turn the page to switch to the total view...

Page 39: ...nnot enter the configuration screen the screen introduction as shown in the figure Permission The operator s permission to enter the configuration mode is divided into operator and administrator and the sub groups that can be entered by different permissions are also different while the operator s permission can only enter the input backup and print sub groups temporarily the administrator s permi...

Page 40: ... screen is introduced as shown in the figure Configuration Adopt hierarchical menu structure with functions of system configuration input configuration output configuration communication configuration print configuration backup configuration display configuration control configuration report query function information software version etc Software version The current software version used by the s...

Page 41: ...s the Confirmation Key to enter System Configuration the screen is introduced as shown in the figure Time and date setting Set the system date and time Management password the only password for administrator authority to log in the configuration to modify or view parameters initial default 10 00 00 Operation password the only password for operator authority to log in the configuration to modify or...

Page 42: ...r selection Once the system maintenance operation is confirmed the relevant data will be cleared or the factory settings will be restored the process is irreversible please operate carefully PID adjustment Allow prohibit the adjustable function of PID screen parameters i e when it is turned on the parameters in the PID screen are allowed to be adjusted and vice versa is not allowed Shift report se...

Page 43: ...you cannot enter the configuration and modify the parameters To change the operator password you need to log in the system parameters under the administrator authority to change it The operator authority does not have the authority to change the operator password The factory settings will initialize all configuration information and clear all stored data in the instrument including historical data...

Page 44: ...versal analog signal input such as 4 20mA 0 20mV etc When setting the signal type it should be consistent with the signal of primary instrument or detection element Press Confirmation Key to enter the Type Selection screen for quick type selection operation Engineering unit user defined engineering unit not related to measurement signal calculation supports user defined expansion unit 1 and operat...

Page 45: ...tment value should be set to 0 Cold end compensation When the cursor is in the cold end compensation setting box press Confirm to switch given or external mode when in the given mode the cold end compensation value can be set freely the cold end compensation value in external mode is captured automatically by the system and the factory default is external mode Flow configuration Press F1 to enter ...

Page 46: ...eters switch the channel serial number and paste F4 to another channel Operation Press F1 to quickly enter the flow accumulation grouping screen Press F2 to quickly enter the alarm configuration screen Press F3 to quickly copy the currently selected channel parameters Press F4 to quickly paste the copied channel parameters to the currently selected channel Press F5 to quickly exit the system confi...

Page 47: ...lowmeter electromagnetic flowmeter etc single cumulative model for pure cumulative channel The mass flow rate formula see Appendix II for details open type differential pressure model optional native open square or differential open square Input mode optional for frequency type model counting frequency value or counting pulse number Flow rate unit m h m min m s L h L min L s t h t min t s kg h kg ...

Page 48: ... steam pressure natural gas hot water the meaning of each compensation type is detailed in Appendix III temperature channel the source channel is selected when the external compensation and the given compensation value is set when the internal compensation is given Pressure channel Select the source channel when external compensation is applied and set the given compensation value when internal co...

Page 49: ...meters can be edited and adjusted to change when it is displayed off it means the flow accumulation function of Ben channel has been turned off and the parameters cannot be edited and adjusted to change when it is off Clear the accumulation Press F4 to clear all the previous accumulated data of the current channel including the accumulated values in the total view flow screen and the class accumul...

Page 50: ...press the Confirmation key to enter Output Configuration the screen is introduced as shown in the figure Channel serial number The serial number of the output channel the number of selectable channels is limited by hardware Output type The output signal type of the variable transmission output channel is selected Engineering unit the engineering unit of the variable output which is not related to ...

Page 51: ...tion range is used in negative action the upper limit of the variation range corresponds to the lower limit of the output current and the lower limit of the variation range corresponds to the upper limit of the output current Source range upper and lower limits user defined the upper and lower limits of the variation output range of the signal source channel sampling channel Operation Press Left K...

Page 52: ...inguish the instrument when it forms a network it is the identification of the instrument in the network It is used by the host software to access the instrument the local address can be set between 001 and 255 in the same communication network and cannot be repeated Baud rate The baud rate can not be changed when the communication mode is printer mode and the baud rate can be selected when PC mod...

Page 53: ...ration Move the cursor to the Print entry in the Configuration screen and press the Confirmation Key to enter Print Configuration the screen is introduced as shown in the figure Print Channel The channel number where the user needs to print data curves Print Type The type of content to be printed by the user divided into data and curve Print Interval The time interval when printing data curves Pri...

Page 54: ...value Operation Press F3 to stop printing Press F4 to start data curve printing Press F5 to quickly exit the print configuration Press Left Key or Right Key to move the cursor Press Up key or Down key to adjust data or toggle selection Press Confirmation Key to jump quickly the cursor is at the start and end time date 5 8 Backup Configuration Move the cursor to the Backup entry in the Configuratio...

Page 55: ...e the data can not be backed up File name the name of the backup file cannot be changed Backup progress real time display of the current backup process progress the filled area is the current backed up part the middle value of the progress bar is the backup progress percentage value Operation Press F3 to reset to restart the backup Press F4 to start data backup Press F5 to quickly exit the backup ...

Page 56: ...elect the start screen displayed after the instrument starts Channel association associate with any channel combination or close the channel Curve color Select the display color of each curve Operation Press F5 to quickly exit the display configuration Press Left key or Right key to move the cursor Press Up Key or Down Key to switch the selection Note When Group screen is selected as the starting ...

Page 57: ...n the screen is introduced as shown in the figure Loop serial number The channel serial number of the control loop limited by configuration up to 4 channels Loop status Select the channel working status Setting value SV Select the source and value of the setting value Sampling value PV Select the signal source of the sampled measurement value Output value MV Set the upper and lower limit values of...

Page 58: ...rential time D Integration separation Set the integration separation value When there is a big deviation in the system the integration action is canceled and when the deviation of the system is small the regulated quantity is close to the given value the integration takes effect Forward and reverse action Select the control loop action mode Operation Press F3 to copy the parameters Press F4 to pas...

Page 59: ...ative daily report shows the cumulative details of the daily flow rate the monthly cumulative value and the annual cumulative value of the year in which it is located in the last day of the previous month and the month in which it is currently located the cumulative shift report shows the cumulative details of each shift the monthly cumulative total value and the annual cumulative value of the yea...

Page 60: ...t query F1 F4 see each function key Note After resetting or switching shift report in System Configuration it is necessary to clear the accumulation of each channel before use The monthly report displays the accumulated records of up to 13 months and the daily report and shift report display the accumulated records of up to 32 days and the system automatically deletes the recorded data of the prev...

Page 61: ...m configuration Analog Inputs Shows the total number of analog inputs configured in the current system Relay number Shows the total number of relay outputs configured in the current system Transmission output Display the total number of analog output channels configured in the current system Flow accumulation Shows whether the current system is configured with flow accumulation function PID contro...

Page 62: ...open the function operation authority is not enough clear the power down or alarm list restore factory settings etc The prompt dialog box is shown in the following figure Some parameters can be entered into the auxiliary interface for quick editing the auxiliary interface as shown above the auxiliary interface is mainly used for alarm upper and lower limit settings range upper and lower limit sett...

Page 63: ...signal setting in the configuration is wrong 2 Wiring error 1 Checking group state 2 Check the signal line Alarm output is not normal 1 The alarm limit is set wrongly 2 Alarm points are shared by other channels 1 Reset the limit value 2 Cancel other alarm points Power distribution output encountered problems 1 Wiring error between transmitter and instrument 2 Multiple transmitter power supply exce...

Page 64: ...ith data section 2 Erase thedata area once 3 No effect on the data record 4 Record interval set smaller or backup time longer 5 Use genuine compatible USB flash 6 The data time period is too long exceeding the drive 6 need to backup maximum reading time data time period set a field of the upper computer little smaller software segmentation and batch backup 1 Connect the communication line No commu...

Page 65: ... principles Repair cycle Five working days from the date of receipt of the product Repair cost This series of ultra thin widescreen color paperless recorder free warranty period is one year product quality issues The warranty period is calculated from the date of purchase by the user and is evidenced by the user s purchase invoice indicating the product model and host serial number or a copy If th...

Page 66: ... back by express mail without insurance if you need to transport by other parties please specify in the form and pay the related fees Appendix I Bit Number Configuration The bit number configuration screen is shown in Figure Appendix 1 1 and is described as follows Appendix 1 1 Bit Number Configuration Screen Input method Pinyin for the input of Chinese characters English a for uppercase English c...

Page 67: ...on function box press Left or Up to move to the input method function box Pinyin English number symbol selection Pinyin selection appears when input method is Pinyin When the cursor is in the Pinyin selection function box press F1 F2 F3 or F4 function key to input Pinyin letters and then a variety of Pinyin combinations can appear up to 4 Pinyin combinations can be displayed on one screen Operatio...

Page 68: ...ction box first press F5 function key to the default 01 channel all backspace and then press right key to the number selection function box at this time the cursor stays on the number 1 press confirm key after the selection of the channel After selecting the channel number the bar at the function box will automatically move backward one press Down to return to the input method function box Press t...

Page 69: ...al bar at the channel bit number function box will automatically move backward one similarly repeat the operation and steps after all the bit numbers are set as shown in Figure 1 4 press F1 to save the function key to save the set bit numbers at this time the system automatically returns to the input configuration screen Note When you press F2 to cancel the function key the system does not save th...

Page 70: ...nd meter coefficients Appendix 2 1 Mass flow rate calculation formula Differential pressure flowmeter Q K type appendix 2 1 1 K Instrument coefficient the input differential pressure value medium density Vortex flow meter K factor in times m Q 3600 I f K style Appendix 2 1 2 K Instrument coefficient I f Vortex frequency ...

Page 71: ... and coefficient value are set to the unit and coefficient value of the flow meter if the flow meter unit is times L the meter coefficient flow meter coefficient 1000 273 15 Tn 0 10136 Pf Zn f n 273 15 T 0 10136 P Z n f Appendix 3 1 1 When the model is selected as linear the flow coefficient K is set to 1 when the medium is not compensated the volume Volume channel in the volume upper limit is set...

Page 72: ...l gas equation of state and the relationship between the working density f and the standard density n corresponds to the following equation where the standard temperature Tn 20 00 C the standard pressure gauge pressure Pn 0 000Mpa and Tf is the working condition temperature Pf P is the working condition pressure gauge pressure Saturated Steam The purpose of saturated steam compensation is to obtai...

Page 73: ...heated steam according to the actual input pressure and temperature Natural Gas The purpose of natural gas compensation is to convert the working volume to the volumetric flow rate at standard conditions The equation of state of natural gas is in accordance with the ideal gas equation of state and the relationship between the working density f and the standard density n equation is in accordance w...

Page 74: ... 0 9686 Propylene 1 7495 Carbon monoxide 1 165 Carbon Dioxide 1 829 Hydrogen Sulfide 1 4169 Sulfur Dioxide 2 726 Appendix IV Flow rate usage examples Example 1 Using a standard orifice plate to measure the mass flow of superheated steam Known Differential pressure sensor two wire 4 20mA differential pressure transmitter the need for instrumentation open side range 0 000 4 000KPa corresponding to t...

Page 75: ...apor 8 temperature channel temperature channel is divided into given and external complement if you choose to give enter the given temperature if you choose external complement select the temperature channel number in the following 9 pressure channel pressure channel is divided into given and external complement if you choose given enter the given pressure afterwards if you choose external complem...

Page 76: ...t 4 20mA 2 Engineering unit select m3 h 3 The lower range limit is 0 00 the upper range limit is 25 00 4 Other parameters are set as needed Flow accumulation in 1 Model selection linear 2 Flow unit select m3 h 3 The instrument coefficient is set to 1 000 4 The upper limit of flow range is set to 25 00 5 the lower limit of the flow range is generally taken as 0 00 6 media compensation selection no ...

Page 77: ...nuous signal Configuration process System configuration PID rectification selection allowed for adjusting PID screen parameters Inputconfiguration temperature channel CH01 parameters user defined Output configuration output channel CH02 the signal source is set to PID01 and the rest parameters are user defined Control configuration control channel PID01 loop state is selected as enabled set value ...

Page 78: ... MV in the PID screen to make PV reach near the set value Set the loop state to automatic and observe whether the sampling value PV reaches the requirement Adjust the PID parameters to make the loop reach the stable state ...

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