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LTH Electronics HPT63, Руководство по эксплуатации

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19 Appendix D – Buffer Solutions 

 

 

 

 

 

 

 

51 

19  Appendix D – Buffer Solutions 

The following table gives the LTH buffer solution values.  Prepare and use buffer 
solutions in accordance with the instructions supplied with them. 

pH variation against temperature 

 

Temperature (

°

C) 

 

4 pH Buffer 

7 pH Buffer 

9 pH Buffer 

0 4.00 

7.11 

9.49 

10 4.00 7.06 

9.35 

20 4.00 7.01 

9.24 

25 4.01 7.00 

9.19 

30 4.02 6.98 

9.14 

40 4.04 6.97 

9.07 

50 4.06 6.97 

9.01 

60 4.09 6.97 

8.96 

70 4.13 6.99 

8.92 

80 4.16 7.03 

8.89 

90 4.21 7.08 

8.87 

 

 

Содержание HPT63

Страница 1: ...HPT63 pH REDOX TRANSMITTER OPERATION GUIDE...

Страница 2: ......

Страница 3: ...etc within the unit Any attempt to dismantle the instrument will invalidate the warranty Disclaimer LTH Electronics Ltd reserves the right to make changes to this manual or the instrument without noti...

Страница 4: ...the European Low Voltage Directive using BS EN 61010 1 1993 Quality This instrument has been manufactured under the following quality standard ISO 9001 2000 Certificate No FM 13843 Note The standards...

Страница 5: ...3 4 2 The Menu System 14 4 3 Unit Configuration 15 4 4 Number entry 16 4 5 Error Messages 16 5 Main Display 17 6 Menu Access 18 6 1 Changing the Access Code 18 7 Parameters 19 7 1 Units 19 7 2 Electro...

Страница 6: ...1 Language 36 12 2 Temperature Input Sensor 36 12 3 Error Messages 36 12 4 Input Filtering Averaging 36 12 5 Bargraph 36 12 6 Software Version 36 13 Cleaning Menu 37 14 Fault Finding 39 14 1 Problems...

Страница 7: ...st Significant Bit MSB Most Significant Bit ppm Parts per million ppt Parts per thousand PRT Platinum Resistance Thermometer PSD Programmable System Devices Redox Reduction oxidation Chemical reaction...

Страница 8: ...Contents iv...

Страница 9: ...measurement 0 00 to 14 00pH 1999mV to 1999mV 50 C to 300 C Accuracy 0 05pH 3mV Linearity 0 1 of range Repeatability 0 1 of range Operator adjustment pH Antimony Redox Slope 60 120 60 120 NA Offset 3 t...

Страница 10: ...for each relay Adjustable delay timers up to 10 00 mm ss and hysteresis in the On Off mode Adjustable dose alarm timer up to 15 00 mm ss in all modes Adjustable cycle time and proportional band in th...

Страница 11: ...MINAL OF THIS INSTRUMENT ADHERE STRICTLY TO LOCAL WIRING AND SAFETY REGULATIONS WHEN INSTALLING THIS UNIT SHOULD THESE REGULATIONS CONFLICT WITH THE FOLLOWING INSTRUCTIONS CONTACT LTH ELECTRONICS OR A...

Страница 12: ...built in to minimise the potential for interference from these sources but it is recommended that you apply the following wiring practices as an added precaution Cables transmitting low level signals...

Страница 13: ...ce with the sensor in the main current flow Figure 1 shows the dimensions of the components required for installation Figure 2 shows the dimensions of the completed assemblies The two cells are physic...

Страница 14: ...3 Installation 6 63mm 59 mm 138mm 116mm 273 mm 70mm 116mm Figure 2 Head mounting component dimensions...

Страница 15: ...ion Mechanics This version is mounted on a wall and connects to sensors via a maximum 10m cable Figure 3 shows the dimensions and fixing points of the unit 116mm 104mm 140mm 152mm 118mm 73mm 48mm 22mm...

Страница 16: ...TAINLESS STEEL PROBE HOLDER TANK WALL 1OO 795 or 1395 PROBE HOLDER 25O to 6OO or 12OO REQUIRED 36 TO 38 DIA 116 3O DEG NYLON COATED TUBE CLIPS 115O MAX or 55O MAX CENTRE HOLE CLEARANCE FASTENERS 6 ADJ...

Страница 17: ...plus an underside connector for the wall mounted version The connections are as follows 3 4 1 Connector 1 PS Input and Current Outputs Free female socket Pin Function 1 Common 0V 2 24V supply 3 Curren...

Страница 18: ...le plug Advanced version only Pin Function 1 Relay 1 common 2 Relay 1 normally open 3 Relay 1 normally closed 4 Relay 2 common 5 Relay 2 normally open 6 Relay 2 normally closed 7 Not used 3 4 4 Connec...

Страница 19: ...screen around the clear core is not used cut it back 3 4 5 Power Supply The unit requires a supply between 15 and 30V 24V nominal at 200 mA Note The maximum current output load resistance depends on t...

Страница 20: ...s use a slave relay Figure 6 Slave relay connection 3 5 Digital Inputs The digital inputs are used to externally initial a cleaning cycle or to take the unit off line These inputs are intended to be s...

Страница 21: ...CD to display all of the settings and readings The seven segment digits at the top of the display indicate the primary measured value during normal operation The six character display to the right of...

Страница 22: ...backwards through the menus Use the and keys to move up and down the menu options in each column Depending on the current settings some menu options may not be present For example if Set Point 1 is di...

Страница 23: ...lue 4 Press the key to confirm your selection of the required value The parameter value will stop flashing indicating that it has been set 5 Use the and keys to navigate to the next parameter to be ch...

Страница 24: ...o a Key symbol if the new code you have entered is correct If the number is a parameter value the parameter has now been set to that value 4 5 Error Messages If the internal diagnostics have detected...

Страница 25: ...Point 1 is enabled and trigger is set to Low or High It shows set point value in the assigned units SP1H This appears when Set Point 1 is enabled and trigger is set to Band Latch Lo or Latch Hi It sho...

Страница 26: ...ccess and a padlock for denied access As supplied the unit has the following default access codes 0001 Restricted access at Level 1 0002 Full access at Level 2 On first use it is recommended that the...

Страница 27: ...s by enabling and disabling the appropriate menu items e g the slope calibration menu is disabled when mV are selected When mV are selected the instrument displays the unprocessed input voltage to the...

Страница 28: ...It is also possible to select the temperature sensor type in this menu When the manual mode of operation is selected the user can enter the fixed process temperature under the Fixed Temp menu Note Whe...

Страница 29: ...responding accordingly To select the Simulate menu item from the Parameters menu press the key The unit will now display the simulation menu Pressing the and keys will cycle the displayed value betwe...

Страница 30: ...lable Sensor IP or Temp IP Trig Hi or Lo Set point n value SPn Mode On Off PP Pulse Proportional TP Time Proportional SPn Dose Alarm No Yes SPn Alarm time SPn Delay On Off mode only SPn Hysteresis On...

Страница 31: ...point Delay and hysteresis can be applied Trig Band The relay will become activated when it is either greater than the Band High set point or lower than the Band Low set point Delay and hysteresis ca...

Страница 32: ...set to be a little larger than the input noise level In addition to the On Off mode the HPT63 also provides two forms of pseudo proportional control which can be used to control the levels to a defin...

Страница 33: ...prevent over dosing and flash the set point LED on the front panel The display will also flash a warning message when the alarm is activated Note During pulse or time proportional operation the cumula...

Страница 34: ...uts Alternatively the source can be switched off by selecting Disabled for that source 9 2 Select Output The output range for the current output can be set to one of two ranges either 0 20 mA or 4 20...

Страница 35: ...at which the output is 20 mA as the proportional band e g 4 pH a simple form of proportional control is achieved If this signal were used to drive a valve actuator the valve would be fully open at 4...

Страница 36: ...you sure Adjust 0 mA Adjust 4 mA Adjust 20 mA Reset User Cal Are you sure Resetting 10 1 On Line Off Line Operation Selecting the Mode menu will allow the user to place the unit in the Off line state...

Страница 37: ...slope can vary with age and hence periodic slope recalibration may be required The buffer offset value can also be adjusted but this should not require regular adjustment once the unit has been set u...

Страница 38: ...sor reading 5 Use the and keys to set the reading to the known true temperature compensated value of the solution 6 Press to confirm the correct reading The display will show the buffer or slope calcu...

Страница 39: ...that the sensor is immersed in a solution of known temperature 2 From the Temperature Calibration page press the key The screen will display Are you sure 3 Press to confirm or any other key to abando...

Страница 40: ...Calibration This option resets all of the user calibrations to their default From the Reset User Cal page press the key The message Are you sure will appear Press to confirm and continue with the res...

Страница 41: ...d set up parameters that are used by the instrument and which can be changed or viewed on the display by the user Primary backup the A stores can be written to or read back as a block of data Data in...

Страница 42: ...the instrument Remember to Save the normal set up first and restore it afterwards If corruption of data is reported by the software with an error message the saved set up can be copied back into the W...

Страница 43: ...ng parameters The menu structure is as follows Configuration Language some units only English Francais Espanol Italiano Temperature Input sensor T input PT1000 3k Balco Disabled Errors Enabled Disable...

Страница 44: ...ers on the display 12 4 Input Filtering Averaging When very noisy environments are encountered this function will allow the user to filter the sensor readings by taking a running average over the time...

Страница 45: ...has been selected If unit is to remain On line during cleaning a Y option forces the cleaning to wait until all relays are inactive While cleaning is being delayed an E23 error message may be display...

Страница 46: ...13 Cleaning Menu 38 Typical Operation with Clean Offline Duration Clean Relay Set point Relay Current Output Offline Lamp on Recovery Interval off off off on Hold Normal Normal...

Страница 47: ...ure of the fault or faults Any error messages that are displayed The sensor type cable length and type Current output configuration Relay connection configuration Software version It is often worthwhi...

Страница 48: ...ature reading is correct Check the instrument calibration using a pH simulator Adjust the user calibration if necessary see Section 10 Calibration Use another instrument to check the sensor The Sensor...

Страница 49: ...ring as they pass the set point check the hysteresis setting see Section 8 3 1 On Off Mode and increase if necessary Ensure that the relays are connected properly see Section 3 4 7 Relay Connections a...

Страница 50: ...cable Cable Length The response of the instrument to a sudden change in the sensor input will be determined mainly by the source resistance of the electrode and the length of the connection cable For...

Страница 51: ...no further guarantee is given although any complaints concerning their operation will be carefully investigated Goods for attention under guarantee unless otherwise agreed must be returned to the fac...

Страница 52: ...15 Guarantee and Service 44...

Страница 53: ...100mV SP1 Mode On Off On Off SP1 Dose Alarm No No SP1 Alarm Time mm ss 05 00 05 00 SP1 Delay mm ss 00 00 00 00 SP1 Hysteresis of SP Level 1 0 1 0 SP1 Cycle Time mm ss 00 30 00 30 SP1 Proportional Band...

Страница 54: ...Sensor Sensor Output A Mode 4 20mA 4 20mA Output A Zero 0 00 pH 0 mV Output A Span 14 00 pH 1000mV Output B Source Temperature Temperature Output B Mode 4 20mA 4 20mA Output B Zero 0 00 0 00 Output B...

Страница 55: ...perature Units Temperature Compensation Fixed Temperature Input Set Points SP1 Source SP1 Trigger SP1 Level Band High SP1 Band Low SP1 Mode SP1 Dose Alarm SP1 Alarm Time mm ss SP1 Delay mm ss SP1 Hyst...

Страница 56: ...ange Cleaning Duration mm ss Interval hh ss Mode Recovery mm ss Delay Current Output Output A Source Output A Mode Output A Zero Output A Span Output B Source Output B Mode Output B Zero Output B Span...

Страница 57: ...and test purposes standard solutions at various potentials can be purchased LTH Electronics offers 2 standard solutions Part No 138 175 124mv Redox solution 500ml Part No 138 176 358mv Redox solution...

Страница 58: ...18 Appendix C Redox Solutions 50...

Страница 59: ...solutions in accordance with the instructions supplied with them pH variation against temperature Temperature C 4 pH Buffer 7 pH Buffer 9 pH Buffer 0 4 00 7 11 9 49 10 4 00 7 06 9 35 20 4 00 7 01 9 24...

Страница 60: ...alues of temperature sensors that may be used with the HXT63 series Not all options are available on all models Temperature C PT1000 RTD 3K Balco 0 1000 0 2670 10 1039 0 2800 20 1077 9 2930 25 1097 3...

Страница 61: ...e two default setups E05 Store A Checksum Error The data in setup store A has been corrupted Save the current setup back to store A E06 Store B Checksum Error The data in setup store B has been corrup...

Страница 62: ...libration below spec Try fresh buffer solution Check sensor for damage and replace if necessary E18 User Sensor Slope User sensor slope calibration above spec Try fresh buffer solution Check sensor fo...

Страница 63: ...E41 Current Output A Hardware Fault The current output circuit has detected an error in the output This is most commonly due to either a broken loop or too large a load resistor It can also be caused...

Страница 64: ...such they should not appear if the software is functioning properly The error message should time out after approx 5 seconds If the error continues to be displayed call LTH or an authorised distribut...

Страница 65: ...36 Connections 15 Input source 30 Max resistive load 15 Output range 30 Zero Span 30 Delay 41 Display 17 Dose alarm 29 Electrode type 24 EMC ii EMI 8 Error 31 Error message 20 21 40 43 57 Fault Findi...

Страница 66: ...stic tests 43 Sensor Accuracy 5 Sensor error 29 Set point 21 26 Delay 28 Dose alarm 29 Hysteresis 28 On Off Mode 28 PP Mode 29 Relay 26 Source 27 TP Mode 28 Trigger 27 Slope 33 Software version 42 Sta...

Страница 67: ...x Restore Setup B Input filter Bargraph Manual temperature SP1 mode O P B source Temperature Restore default pH Bargraph on off Simulated current output A SP1 dose alarm O P B mode 0 4 20 mA Current O...

Страница 68: ...LTH Electronics Ltd Chaul End Lane Luton Bedfordshire LU4 8EZ United Kingdom Telephone 44 0 1582 593693 Fax 44 0 1582 598036 e mail sales lth co uk web www lth co uk...

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