IBP HDM99 User Manual Download Page 26 | Manualshive

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Measurement

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pH Measurement

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Summary of Contents for HDM99

Page 1: ...HDM99 Dialysis Measuring System User Manual ...

Page 2: ...owed only in agreement with the contractual arrangements Whoever transfers this software and or this manual on magnetic tape diskette or any other media except for the purpose of own use without written authorization of the IBP Instruments GmbH is liable to prosecution Copyright C 1996 2000 IBP Instruments GmbH All rights reserved Publisher IBP Instruments GmbH IBP Instruments Inc Sutelstr 7A 635 ...

Page 3: ...he front Apply a protection filter to the nozzle for the pressure measurement Avoid a discharge of static electricity over the sockets It could lead to the destruction of your measuring device Before touching the sockets and lines that are connected with them keep an eye on the discharging of static electricity Voltages above 40V can be dangerous Take extreme care while working with higher voltage...

Page 4: ... PH MEASUREMENT 26 PH CALIBRATION IN THE MEASURING MODE 30 FLOW MEASURING 31 MANAGEMENT OF DIFFERENT SENSORS 31 COUNTER 34 POOL MENU 35 VOLTAGE MEASUREMENT PLOTTER 36 VOLTAGE MEASUREMENT OSCILLOSCOPE 38 BATTERY VOLTAGE 40 INSTALLATION 41 LANGUAGE 41 SWITCH OFF TIME 41 ADJUST RESET 42 CALIBRATION OF THE HDM99 43 ADJUSTMENT 43 CALIBRATION OF TEMPERATURE MEASUREMENT 45 CALIBRATION OF CONDUCTIVITY MEA...

Page 5: ... 57 MAINTENANCE AND CARE OF THE HDM99 58 STORAGE 58 CLEANING 59 CALIBRATION INTERVALS 60 SPECIFICATIONS FOR THE HDM99 62 RS 232 INTERFACE 64 HDMCMO STARTS BACKGROUND MEASUREMENT 66 12964 12 24 7 750 7 00 0 03 0 05 6 12 1200 1000 79131 999999 CR LF à à 73 SIGNS 66 ...

Page 6: ...rature Flow through connector for conductivity temperature probe Pressure measuring tube Voltage measuring cables Count input measuring cables Battery charger Standard solution conductivity 13 63 mS cm The documentation of HDM99 consists of this manual If you should miss anything please contact your supplier ...

Page 7: ...tic compatibility 89 336 EWG of the member states For the rating of the devices in view to their electro magnetic compatibility the following norms have been used Emission EN 55022 Class B Immission IEC 801 3 Criterion A IEC 801 2 Criterion A IEC 801 4 Criterion B This declaration is responsibly given for IBP Instruments GmbH Sutelstr 7A 30659 Hannover by Dipl Ing Werner Pfingstmann Managing direc...

Page 8: ...treatment inappropriate usage by connecting to excess voltages modifications in the device or through risks which the user has to cover by a suitable insurance fire water intrusion robbery etc All conceivable measures were met to assure the accuracy of this product documentation IBP cannot grant any guarantee for the completeness and the accuracy of the software and the documentation IBP is not re...

Page 9: ...s The calibration of the device by the user is simple and gives no problems The display of measurement results is available n numerical and also in graphical form Via the serial interface the measurements can be called independently of the current display and further processed or presented on a PC For the fault location at dialysis machines IBP has developed a program that presents and processes m...

Page 10: ... conductivity measurement is designed for quadropole technology Please use exclusively the electrode delivered with the device by IBP Pressure To avoid damages at the pressure probe or inaccuracies in measurement ensure that no fluids intrude into the device We recommend the application of a protection filter pH The input bushes are intended exclusively for pH electrodes Other signals may destroy ...

Page 11: ...g of the flow The incoming voltage range is 5 24 V The form of the signal should be of a rectangular form and has to be positive Charge connection The charge connection is found at the right side of the device The connection is provided with 12 V 500 mA by the included battery charger For safety reasons never use the HDM99 with connected battery charger on a dialysis machine to which a patient is ...

Page 12: ... supply is used as input and the radial supply as output see illustration The pressure probe in HDM99 is fastened to the radial connection above the input Before any measurements you must shake the connector to assure that any air within the system escapes For the dip in mode open the screw cap at the upper end of the connector and extract the combined electrode You must not remove the tube coveri...

Page 13: ... the elapsing of an adjustable time Main menu After switching on the device you receive an information menu for approx two seconds After that the system goes back to the last setting In some cases you will receive the following main menu Activation of the function keys leads to display of the info menu display of the measuring menu display of the calibration menu display of the installation menu ...

Page 14: ...troduction Info From the root menu via info you receive the following information There are device specific data like product name software version and version date as well as the serial number of your HDM99 ...

Page 15: ...Measurement 15 Measurement From the main menu over measuring you will receive the following menu ...

Page 16: ...ples for measurement displays F6 F5 F4 F3 F2 F1 F6 F5 F4 F3 F2 F1 The handling of all menus corresponds to the already explained operating instructions The individual menus and sub menus are presented and explained below ...

Page 17: ...possible times presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward When you have selected the suitable time range for your application return to the temperature measurement with the activa...

Page 18: ...e the selection menus At the time range long term measurements up to twelve hours are possible Since you do not have all possible times presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward ...

Page 19: ...y measurement The vertical axis of the course graphic as well as the scale length of the beam display now correspond to the measuring range you have chosen The temperature coefficient menu point allows many different setting possibilities In the parameter menu for conductivity and also conductivity temperature it is possible to choose from a list of preset temperature coefficients of various dialy...

Page 20: ...so have different temperature coefficients For the display to be precise the measuring unit must therefore be set to the temperature coefficient of the current solution The average temperature coefficient for dialysate is 2 07 C A value of 1 97 C is frequently used for natural water To perfect the chaos the different manufacturers of dialysis machines also use different temperature coefficients in...

Page 21: ...Measurement 21 Conductivity and temperature measurement ...

Page 22: ... of the course graphic as well as the scale length of the beam display now correspond to the measuring range you have chosen The temperature coefficient menu point allows many different setting possibilities In the parameter menu for conductivity and also conductivity temperature it is possible to choose from a list of preset temperature coefficients of various dialysis machine manufacturers These...

Page 23: ...presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward When you have selected the suitable time range for your application return to the temperature measurement with the activation of ok The ...

Page 24: ...ere now the results will be shown in the newly chosen unit Taring Caused by drift of the pressure probe the pressure display may sway slightly around zero With the function tare the display is set to zero You must not apply pressure to the HDM99 during this function This is assured when the pressure tube is not connected Then the environmental pressure represents zero The choice of the function ke...

Page 25: ...suring menu where you have the choice between two different modes of voltage measurement the test for pH value and the control of the charging state of the accumulators If you would like to return to the first measuring menu with conductivity temperature and pressure measurement choose other channels again ...

Page 26: ...Measurement 26 pH Measurement ...

Page 27: ...es presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward When you have selected the suitable time range for your application return to the temperature measurement with the activation of ok T...

Page 28: ...t comp you will be asked to enter the solution temperature via the numeric keyboard After confirmation with ENTER you will return to the menu for the parameter setting Fundamental information about pH measurement For the measurement of the pH value a combined electrode is used pH electrodes are combinations of one reference electrode and one measuring electrode in a glass tube The pH value in the ...

Page 29: ...oys the jelly layer on the glass surface which results in a longer response time of the electrode Due to the special electrode for pH measurement in untreated water further points need to be paid attention to air bubbles in the membrane space of the electrode can be removed easily by shaking movements similar to a clinical thermometer The reference electrolyte in this electrode can be refilled Mak...

Page 30: ...temperature sensor likewise and put it into the measuring beaker Wait until the display remains stable then enter the pH value via the numeric keyboard Confirm your input with ENTER Then wash and dry the electrode and dip it into the second buffer When the value of the second buffer is entered the display shows the actual calibration If thereby the graduation grad is lower than 85 the electrode co...

Page 31: ...overns up to 15 different sensors For detecting the different sensors a code is put on them This code is used for the internal choice of calibration data The number of the connected sensors will be shown in the display Any sensor can be used which has an output signal that delivers a frequency proportional to the flow running The amplitude at the entrance of the HDM99 may have a range of 5 24 V Fo...

Page 32: ... occupancy of the plug connection for the flow measurement Pin Meaning 1 currency supply sensor 5 V max 10 mA 2 signal input 5 24 V max 1 MHz 3 GND 4 code input 0 5 code input 1 6 code input 2 7 code input 3 8 shield for supply ...

Page 33: ... GND IBP Sensor 4 5 GND GND 5 V GND IBP Sensor 5 6 5 V GND 5 V GND IBP Sensor 6 7 GND 5 V 5 V GND IBP Sensor 7 8 5 V 5 V 5 V GND IBP Sensor 8 9 GND GND GND 5 V 10 5 V GND GND 5 V 11 GND 5 V GND 5 V 12 5 V 5 V GND 5 V 13 GND GND 5 V 5 V 14 5 V GND 5 V 5 V 15 GND 5 V 5 V 5 V If you use your own sensors please choose a code beginning at number 9 The numbers 1 7 are reserved for the IBP sensors ...

Page 34: ...he three functions you get optionally to the measuring menu for frequency period duration or event measuring All measurements can be done up to a frequency of 1 MHz In the event measuring the counted events can be reset to zero by operating reset ...

Page 35: ...displayed simultaneously Conductivity temperature pressure flow All necessary settings e g the temperature coefficient for the conductivity measurement or the unit for the pressure measurement are taken from the corresponding measurement menus and can also only be changed there ...

Page 36: ...rements up to twelve hours are possible Since you do not have all possible times presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward When you have selected the suitable time range for your...

Page 37: ... are shorter than the selected damping period can not be recorded Voltage display In the beam display the momentary value of the voltage is displayed The voltage measurement in the plotter mode is particularly feasible for the measurement of voltages which are subject to no fast sway therefore DC voltages and low frequency AC voltages Filter By choice of the function key filter you will receive a ...

Page 38: ...l possible times presented simultaneously a black beam on the right side shows that above or like in the example further options hide themselves below The selected time range is shown inverted To change the time range operate the function keys beside the arrows upward or downward When you have selected the suitable time range for your application return to the temperature measurement with the acti...

Page 39: ...key you will get to a menu where you can adjust the mode of the measurement triggering Press the keys beside the arrows until the desired triggering is presented inverted In detail the options mean No trig The applied voltage is shown without triggering AC The rising edge of the average value of the applied voltage is triggered AC The falling edge of the average value of the applied voltage is tri...

Page 40: ...empty half and full The computer processed charging starts with the connection of the charging device There are two modes of charging quick charge and trickle The light emitting diodes beside the charging socket indicate these modes Green stands for trickle and the red LED indicates quick charge In all working modes the empty battery is indicated as Low Bat in the uppermost menu field With activat...

Page 41: ... entire menu leadership and display appears in the chosen language Switch off time The switch off time is the time after the last key activation At the end of this time the device switches off automatically The activation of the function switch off leads to a selection of times which can be selected with the arrow keys The chosen time is shown inverted and taken over with ok as new switch off time...

Page 42: ...This code is 1704 When you confirm your input with enter you will receive the following images With the function keys beside the individual measuring channels you can decide on which calibration values this function should be applied The calibration values will be reset to basic values After that a new calibration of the reset measuring sizes is necessary The reset of the flow measurement only res...

Page 43: ...ent is adjusted at two points The temperature and pressure measurement is adjusted at minimally two points alternatively up to six points The advantage of more than two calibration points is the higher precision of the measurement as the non linearity of the sensors will be equalized The sequence of the calibration in reference to the level of the values is insignificant Please note that each valu...

Page 44: ...nt is necessary for this Should you be uncertain if you have entered all values correctly at any point in the run of the calibration of the device choose the function cancel Then no calibration will be accomplished and you can start again Should a calibration prove to be incorrect you can reset this calibration by the function calibration reset within the installation menu ...

Page 45: ...erature this temperature is then entered to the HDM99 via the numeric keyboard and confirmed with ENTER The calibration points should be at the following points 20 C 30 C 36 C 38 C 45 C and 80 C After you have entered the last value press the function key stop input If a higher precision is required at temperatures around 80 C you can enter further calibration points at 60 C and 85 C In this case ...

Page 46: ...Calibration 46 ...

Page 47: ...ions other values can be used Use this function only if you are aware of the consequences By using wrong values you will get a wrong conductivity value You reach this function by calling the menu point ref temp There you can enter the new reference temperature via the numeric keyboard and confirm it with ENTER By activation of the ok key the new reference temperature will be saved in the software ...

Page 48: ... not used until it is selected in the parameters menu for Conductivity and Conductivity Temperature By operating the menu point conductivity range you can choose the correct range with the arrow keys While calibrating the solution should have a temperature of approximately 25 C As soon as the measuring value in the display is stable the calibration value of the solution can be entered by the numer...

Page 49: ...e 0 20 mS cm If the measuring range is too small the device indicates the overflow with OFL above the beam display Via the menu point measure conduct you can choose the correct measuring range with the arrow keys During the calibration the standard solution should have a temperature of approx 25 C When the measurement value in the display is stable the conductivity value of the standard solution c...

Page 50: ... is known This is profitable for an exchange of the electrode Choose the function input cellpar Enter the cell parameter via the numeric keyboard and confirm it with ENTER Subsequently all values relevant for the conductivity measurement will be indicated once more With the ok key the data will be saved ...

Page 51: ...ou have the choice whether to terminate the calibration function stop input or to enter further values function another input The pressure probe is applied with known pressure and then the values will be entered successively via the numeric keyboard and confirmed with ENTER The calibration points for the measurement on dialysis machines should be at 400 100 0 100 and 500 mmHg If you call the funct...

Page 52: ... entered only if the values on the display are stable The sequence of the calibration in reference to the level of the values is insignificant Please note that each value may be entered only once since the system does not accept the data otherwise ...

Page 53: ...chosen type of the calibration is check marked in the menu point measure t comp or enter t comp If you select measure t comp no further input is necessary The temperature will be measured via the measuring cell and you will get to the pH measurement automatically By choice of enter t comp you will be asked to enter the solution temperature via the numeric keyboard After confirmation with ENTER you...

Page 54: ... wash and dry the temperature sensor likewise and put it into the measuring beaker Wait until the display shows a stable value and then enter the pH value via the numeric keyboard Confirm your input with ENTER Then wash and dry the electrode and dip it into the second buffer When the value of the second buffer is entered the display shows the actual calibration If thereby the graduation grad is lo...

Page 55: ...nt sensors will be governed automatically For calibration the correct sensor must be applied In case that no sensor should be connected a fault notice will occur The running number of the recognized sensor will appear in the following presentations in the upper display Look also in the manual under flow measurement ...

Page 56: ...unt of the quantity that has flown through with the chosen unit and confirm with Enter Check the calibration once again This way the calibration is complete Given number of impulses per liter This type of calibration should be used if the value is known Enter the value for the number of impulses liter and confirm with Enter This way the calibration is complete Given amount of the flown quantity Th...

Page 57: ...in reference to the size of the values is insignificant For the calibration value 0 V create a short circuit between the sockets For other calibration values apply known voltages to the sockets The entering of the calibration values is carried out via the numeric keyboard Please pay attention that the values in the display are stable then enter the calibration values and confirm them with ENTER Af...

Page 58: ...e batteries Sink the whole device into a vessel with distilled water over night Afterwards dry the HDM99 and send it to the producer for repair There are no parts in the HDM99 which you can repair yourself Please turn to our technical support at evident malfunctions that can not be removed by a new calibration of the device If the device should show any damages or malfunctions by moisture influenc...

Page 59: ...stances by rinsing with de ionized water fats and oils with warm water and household dish washing detergent Lime and hydroxid crusts can be solved by 10 per cent acetic acid In each case the measuring cell needs to be washed with de ionized water after the cleaning Basically the conductivity measuring cell does not decay Particular measuring media for example strong acids and caustic solutions org...

Page 60: ...e measurement once a year pressure measurement once a year pH measurement before each measurement If for individual measuring channels the function adjust reset was used then a new calibration is necessary for these channels To handle the calibration please read the individual sections in which the calibration is described for the different channels Write down your calibration values and keep them...

Page 61: ...nnel measuring range allowed limits voltage DC 40 V 0 05 V voltage AC 40 V 0 05 V pressure 700 1600 mmHg 2 mmHg conductivity 0 20 mS cm 0 1 mS cm temperature 30 40 C 0 1 C 0 30 and 40 100 C 0 2 C flow 100 600 ml min 3 ml min pH pH 0 pH 14 0 1 pH ...

Page 62: ...n 0 1 C otherwise better than 0 2 C probe integrated in combined conductivity temperature electrode Pressure measurement 700 1600 mmHg precision better than 0 5 of full measuring range connection over tube nozzles Flow measurement Measuring range and precision are dependent on the sensor only Typical precision better than 1 of the measuring range final value pH measurement Electrode is not include...

Page 63: ...01 V precision better than 0 15 of measuring range value frequency response in oscilloscope mode 3 kHz 3 dB Power supply Ni MH battery rechargeable with 12 V DC operation time according to operation mode approx 10 hours Size approx 270 x 120 x 50 mm ...

Page 64: ...2 interface Pin No Signal Pin No Signal HDM99 computer 2 RD 3 TDX 3 TD 2 RXD 5 GND 5 GND SG 7 RTS 8 CTS 8 CTS 7 RTS Interface parameters The following interface parameters are fixedly adjusted at the HDM99 Baud rate 9600 Parity None Data bits 8 Stop bit 1 ...

Page 65: ...sure HDMPH sends pH pH value HDMVD sends VD voltage DC HDMVA sends VA voltage AC HDMVB sends VB voltage of the battery HDMAL sends successively CD TP PR pH VD VA VB HDMEE switches the transmission on HDMEA switches the transmission off HDMAE sends number of valid digits and units for CD TP PR pH VD VA VB HDMBSCE sends continuously measurements from current display of HDM99 The tact rate thereby co...

Page 66: ...ity in µS cm 8 signs Temperature 5 signs Pressure 5 signs pH 5 signs VDC in V 6 signs VAC in V 5 signs Vbattery in V 4 signs Flow in ml min 5 signs Frequency in Hz 6 signs Quantity in ml 6 signs Event 6 signs CR LF 2 signs A Adjustment 43 Adjust reset 42 ASCII 65 B Battery 40 C Calibration 30 43 45 47 51 53 55 57 60 Calibration intervals 60 cancel 44 care 58 cell parameter 49 charging device 11 40...

Page 67: ... M Main menu 13 Maintenance 58 Measuring range 22 39 Messen 15 O oscilloscope 38 P Permissible limits 61 pH 9 10 26 28 29 30 43 53 54 60 61 62 65 plotter 36 Pressure 6 9 10 23 29 62 R Reference temperature 47 RS232 Interface 64 S safety 3 11 40 58 software 2 8 14 43 47 Spannungsmessung 55 Specifications 62 Standard solution 6 Storage 58 Switch off time 41 T Taring 24 Temperature 9 17 28 48 62 Temp...

Page 68: ...Index 68 V Voltage 6 9 10 36 37 38 39 Y y range 18 19 22 39 ...

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