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Operation

114

Selecting the non-

linear temperature

compensation

To select the non-linear temperature compensation proceed 
as follows:

 

1 Press the <CAL> key repeatedly until LF tc appears 

on the display.

2 Press the <run/enter>  key.

3 Press the <CAL>

 

key repeatedly until nLF appears 

on the display.

4 To return to the measuring mode: press the <

ì

> key.

Содержание CG 853P

Страница 1: ...Laboratory conductivity meter CG 853P ba12246e_2 09 99 Operating Manual 77 Conductivity meter with integrated printer ...

Страница 2: ...aults that are determined within the period of warranty The warranty excludes components that are replaced during maintenance such as batteries etc The warranty claim extends to restoring the instrument to readiness for use but not however to any further claim for damages Improper handling or unauthorized opening of the instrument invalidates any warranty claim To ascertain the warranty liability ...

Страница 3: ...ctivity 101 4 2 2 Salinity 102 4 2 3 TDS total dissolved solids 103 4 2 4 Printing transmitting measured values 105 4 3 Determining setting up the cell constant C 106 4 4 Storing 117 4 4 1 Manual storage 117 4 4 2 Switching on AutoStore Int 1 119 4 4 3 Outputting the data storage 121 4 4 4 Clearing the storage 127 4 5 Data transmission 128 4 5 1 Data transmission interval Int 2 128 4 5 2 Recorder ...

Страница 4: ...ontents 80 5 Maintenance cleaning disposal 139 5 1 Maintenance 139 5 1 1 Changing the batteries 140 5 1 2 Replacing the roll of printer paper 141 5 2 Cleaning 142 5 3 Disposal 142 6 What to do if 143 7 Lists 145 ...

Страница 5: ...safety for all applications The integrated printer enables the measurements to be documented in compliance with GLP The proven procedures to determine or set up the cell con stant support your work with the conductivity meter Note The measuring instrument can also be delivered as part of a set Information on this and other accessories is available in the SCHOTT general catalog 1 Keypad 2 Display 3...

Страница 6: ...ing mode ì Set up or determine cell constant select temperature compensation CAL Activate deactivate AutoRead function auto read Store measured value STO Display transmit measured values RCL Reduce values scroll Confirm inputs start AutoRead run enter Increase values scroll ...

Страница 7: ...Overview 83 Print LED Red printer off offline or malfunction Green printer ready for operation online Printer ON OFF print on off Paper feed line feed Printer off Print LED lights up red feed ...

Страница 8: ...ges or currents SELV and circuit with current limiter Almost all commercial electrodes especially SCHOTT electrodes meet these requirements Connections 1 8 pole socket with pin contacts 2 RS 232 interface analog output 3 Plug in power supply Status line Measured value display Function and temperature display 1 2 3 ...

Страница 9: ...Overview 85 1 4 Declaration of Conformity 29 03 99 SCHOTT Geräte GmbH Im Langgewann 5 D 65719 Hofheim am Taunus Deutschland Germany Allemagne 29 März March 29rd 29 Mars 1999 AGQSF0000 A060 00 990329 ...

Страница 10: ...er days 85 µS cm mS cm 0 000 1 999 only with 0 01 cm 1 cell constant 0 00 19 99 only with 0 01 cm 1 constant and 0 1 cm 1 cell constant 0 0 199 9 0 1999 0 00 19 99 0 0 199 9 0 500 SAL 0 0 70 0 according to the IOT table TDS mg l 0 1999 Factor can be set in the range 0 40 1 00 T C 5 0 100 0 T F 23 0 212 0 Ambient temperature Measuring ranges and resolution ...

Страница 11: ...5 C according to EN 27 888 0 5 35 C 50 C extended nLF function according to SCHOTT measurements Linear compensation AccuracyTest sample temperature 0 5 10 C 75 C the accuracy percentage always refers to the measured value SAL Range 0 0 42 0 AccuracyTest sample temperature 0 1at 5 C 25 C 0 2 at 25 C 30 C TDS mg l 1 T C NTC 30 Accuracy 0 1 PT 1000 AccuracyOperating temperature 0 5 0 C 15 C 0 1 15 C ...

Страница 12: ...01 0 1 0 250 2 500 C cm 1 0 450 0 500 0 800 1 200 TREF C 20 25 Manual C 5 100 Length mm 240 Width mm 285 Height mm 85 Weight kg Approx 1 3 without plug in power supply unit Measuring accuracy 1 digit Continuation Cell constant to be set Cell constant calibrated Reference tempera ture selectable Temperature input Dimensions and weight ...

Страница 13: ... 8 A 10 8 VA Plug in power supply US plug Type no Z852 Order no 28 520 4901 FRIWO FW3288 11 8451 Friwo Part No 1816493 Input 120V 60 Hz 21 5 VA Output 6 V 1 8 A Plug in power supply UK plug Type no Z849 Order no 28 520 4975 FRIWO FW3288 11 8453 Friwo Part No 1770896 Input 230V 50 Hz 23 VA Output 6 V 1 8 A Interference emission generic standard EN 50081 1 FCC class A Interference immunity generic s...

Страница 14: ...nput 5 100 C resolution 1K Measuring cell 8 pole socket with pin contacts RS interface analog output Bidirectional RS 232 interface or analog output with autom recogni tion of the PC printer or recorder connected Plug in power supply 2 pole special Friwo Print principle Matrix thermoprint Signs per line 26 Printing width 46 1 mm Width of printing paper 58 mm Printing speed 40 signs sec Temperature...

Страница 15: ...use in the lab oratory Thus we assume that as a result of their professional train ing and experience the operators will know the necessary safety precautions to take when handling chemicals Symbols used Caution indicates instructions that have to be followed to prevent damage to your instrument Warning indicates instructions that have to be followed to protect yourself and the instrument from dan...

Страница 16: ...n a safe and secure technical condition Function and operational safety The smooth functioning and operational safety of the instru ment can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed The smooth functioning and operational safety of the instru ment can only be guaranteed under the climatic conditions spe...

Страница 17: ...ngthy period of time l the instrument is visibly damaged l the instrument no longer operates as described in this manual If you are in doubt contact the supplier of the instrument Obligations of the operator The operator of this measuring instrument must ensure that the following laws and guidelines are observed when using dangerous substances l EEC directives for protective labor legislation l Na...

Страница 18: ...Safety 94 ...

Страница 19: ...ate flashes on the display 4 Set today s date by pressing 5 Confirm with run enter The date month flashes on the display 6 Set the current month by pressing 7 Confirm with run enter The year appears on the display 8 Set the current year by pressing 9 Confirm with run enter The hour field flashes on the display 10 Set the current time by pressing 11 Confirm with run enter The minutes field flashes ...

Страница 20: ...t see section 1 5 TECHNICAL DATA Caution Use original plug in power supplies only see section 1 5 TECHNICAL DATA Note You can also perform measurements without a plug in power supply However the functions of the integrated printer can only be used with connected plug in power sup ply 1 Insert the plug 1 into the socket 2 of the conductiv ity meter 2 Connect the original SCHOTT plug in power supply...

Страница 21: ...oStore function is active l if a PC is connected l if the recorder cable is connected l if the printer cable is connected for external printers 1 Place the instrument on a flat surface and protect it against intense light and heat 2 Connect the conductivity measuring cell to the instru ment 3 Press the on off key The display test appears briefly on the display The instrument then switches automati...

Страница 22: ...r key The previously selected cell constant ist displayed e g 0 475 cm 1 with a calibrated cell constant 3 To return to the measuring mode press the ì key when the correct cell constant ist displayed 4 If a different cell constant is to be set proceed ac cording to section 4 3 DETERMINING SETTING UP THE CELL CONSTANT C ...

Страница 23: ...ter available at SCHOTT Note The conductivity meter automatically recognizes the type of the temperature probe used As a result you can connect electrodes with the NTC30 or Pt1000 The temperature measurement is absolutely essential for a reproducible conductivity measurement If the measure ment is made without a temperature probe proceed as fol lows 1 Connect the measuring cell to the instrument 2...

Страница 24: ...inated at any time by pressing run enter 1 Call up the measuring mode by pressing ì 2 Activate the AutoRead function by pressing auto read The current measured value is frozen Hold function 3 Start the AutoRead function by pressing run enter AR flashes on the display until a stable measured val ue is reached This measured value is transmitted to the interface 4 If necessary start the next AutoRead...

Страница 25: ...according to sec tion 4 2 2 Immerse the conductivity measuring cell into the test sample 3 Press the ì key until appears in the status dis play The conductivity value appears on the display 4 If necessary set the temperature by pressing see section 4 2 page 99 5 Perform an AutoRead measurement according to section 4 2 ...

Страница 26: ...rse the conductivity measuring cell into the test sample 3 Press the ì key repeatedly until Sal appears in the status line The salinity value of the sample appears on the display 4 If necessary set the temperature by pressing see section 4 2 page 99 5 Wait for a stable measured value 6 Perform an AutoRead measurement according to section 4 2 ...

Страница 27: ... integrated temperature probe continue with step 4 When measuring without temperature probe Determine the temperature of the test sample using a thermometer Press the ì key repeatedly until appears in the status line Enter the temperature using 4 Press the ì key repeatedly until TDS appears in the status line The TDS value of the sample appears on the display 5 Set up the TDS factor 0 40 1 00 usin...

Страница 28: ...Operation 104 7 Perform an AutoRead measurement according to section 4 2 ...

Страница 29: ...e data transmission Int 2 see page 128 After expiry of the selected interval the current data record is sent to the printer interface l Switch on AutoStore Int 1 see page 119 After expiry of the selected interval the current data record is sent to the printer interface and in addition is stored in the data store of the instrument AutoStore Int 1 covers the data transmission interval Int 2 l Press ...

Страница 30: ...the conductivity mea suring cell in the range 0 450 0 500 cm 1 or 0 800 1 200 cm 1 by calibrating in the control standard or set it up manu ally in the range 0 250 2 500 cm 1 Additionally you can select one of the fixed cell constants 0 1 cm 1 or 0 01 cm 1 Determining the cell constant calibration in control standard Determine the cell constant as follows 1 Press the CAL key repeatedly until LF CE...

Страница 31: ...mmerse the measuring cell into the 0 01 mol l KCL control standard 5 Press the run enter key If no temperature probe is connected enter the current temperature of the solution using and confirm with run enter If a temperature probe is connected the AR measurement to determine the cell constant starts flashes until a stable signal is achieved The determined cell constant ist displayed the measuring...

Страница 32: ...ins the calibration data of the current calibration Note You can automatically print out a calibration protocol after the calibration To do so switch on the printer before the cal ibration Print LED lights up green After a valid calibration the protocol is printed Display Cell constant cm 1 0 450 0 500 cm 1 0 800 1 200 cm 1 Perform error elimination according to chapter 6 WHAT TO DO IF outside of ...

Страница 33: ... Setting the calibration interval The calibration interval Int 3 is set to 180 days in the fac tory The interval can be changed 1 999 days 1 Switch off the instrument 2 Press ì and hold down the key 3 Press the on off key The display test appears briefly on the display The instrument then switches automatically to the configuration level 4 Press the run enter key until Int 3 appears on the display...

Страница 34: ...ws 1 Press the CAL key repeatedly until LF CELL ap pears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until the cell con stant to be set e g 0 475 cm 1 is displayed 4 Set up the cell constant to be used by pressing e g 0 614 cm 1 5 To return to the measuring mode press the ì key ...

Страница 35: ...measuring cell Selecting the 0 1 cm 1 cell constant To select the 0 1 cm 1 cell constant proceed as follows 1 Press the CAL key repeatedly until LF CELL ap pears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until the 0 100 cm 1 cell constant appears on the display 4 To return to the measuring mode press the ì key ...

Страница 36: ... cm 1 cell constant proceed as follows 1 Press the CAL key repeatedly until LF CELL ap pears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until the 0 010 cm 1 cell constant appears on the display 4 To return to the measuring mode press the ì key ...

Страница 37: ...mpensation Lin with a coefficient that can be set in the range 0 001 3 000 K l no temperature compensation Note ips Select the following temperature compensations to work with the test samples given in the table Application notes Test sample Temperature compensation TC Display indicator Natural water ground water surface water drinking water nLF according to DIN 38404 EN 27 888 Ultrapure water nLF...

Страница 38: ...elect the non linear temperature compensation proceed as follows 1 Press the CAL key repeatedly until LF tc appears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until nLF appears on the display 4 To return to the measuring mode press the ì key ...

Страница 39: ... as follows 1 Press the CAL key repeatedly until LF tc appears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until the adjustable linear temperature coefficient appears on the display 4 Set up the temperature coefficient e g 1 880 K using 5 To return to the measuring mode press the ì key ...

Страница 40: ...pensation proceed as fol lows 1 Press the CAL key repeatedly until LF tc appears on the display 2 Press the run enter key 3 Press the CAL key repeatedly until the following display appears 4 The temperature compensation has been switched off 5 To return to the measuring mode press the ì key ...

Страница 41: ...ate l Time l Measured value l Temperature l I D number You can transmit measured values data records to the data storage in 2 ways l Manual storage l Switching on the AutoStore function Int 1 see page 119 4 4 1 Manual storage You can transmit a measured value to the data storage as follows 1 Press the STO key The current number of the next free memory location appears on the display ...

Страница 42: ...mber 3 Enter the required I D number 1 999 by pressing 4 Confirm with run enter The instrument changes to the measuring mode Store the current measured value The oldest measured value memory location 1 is overwritten by this Press run enter Return to the measuring mode without storing Press any key Output the data storage See section 4 4 3 Delete the data storage See section 4 4 4 ...

Страница 43: ...function is switched off To switch the function on set up a time interval 5 s 10 s 30 s 1 min 5 min 10 min 15 min 30 min 60 min Note If the AutoStore function is active the setting of the data transmission interval int 2 is ineffective see page 128 1 Press and hold down the run enter key 2 Press the STO key Int 1 appears on the display 3 Press the keys to set up the required time interval between ...

Страница 44: ...mory locations are full the Au toStore function is terminated Int 1 OFF If too few storage locations are available for your measurements backup the data storage see page 121 and clear the data stored see page 127 6 Confirm with run enter The prompt for the I D number appears on the dis play 7 Press to set the required I D number 8 Confirm with run enter The instrument changes to the measuring mode...

Страница 45: ... meter off and on again 4 4 3 Outputting the data storage The contents of the data storage can be output to the l display l interface 1 Press the RCL key repeatedly until Sto disp ap pears on the display 2 Press the run enter key A measured value appears on the display The I D number of the data record appears for ap prox 2 s Outputting to the display ...

Страница 46: ...he data record appears on the display Stored data records are displayed together with the RCL display indica tor Display further parameters of the data record I D no date time memory loca tion Press run enter Advance one data record memory location Press Go back one data record memory location Press ...

Страница 47: ...r key A measured value appears on the display The I D number of the data record appears for ap prox 2 s 3 After 2 s the respective temperature of the data record appears on the display 4 Select the parameter e g date by pressing run enter 5 Press or repeatedly until the required date appears on the display After approx 2 s the temperature of the displayed measured value appears ...

Страница 48: ...Sto SEr ap pears on the display 2 Press the run enter key The protocol of the last calibration is transmitted to the printer RS interface In the meantime Sto CAL appears on the display Following the calibration protocol the complete con tents of the storage is transmitted to the interface Outputting to the interface ...

Страница 49: ...5 Cell constant Cell Const Probe evaluation Probe Sample printout CALIBRATION PROTOCOL 14 04 99 11 37 Device No 99990000 CALIBRATION CONDUCTIVITY Cal Time 14 04 99 11 37 Cal Interval 180d Cal Std 0 01 mol l KCL 23 0 C Conduct Tref25 1413 µS cm Cell Const 0 975 1 cm Probe No 1 01 01 99 00 04 2 40 mS cm 25 C Tman nLF Tref25 C 0 475 1 cm Ident 1 No 2 10 01 99 10 09 2 40 mS cm 25 3 C Tauto nLF Tref25 ...

Страница 50: ...g storage Number of the storage location No Date time of measurement Measured value unit mS cm C F Automatic manual temperature measurement Tauto Tman Temperature compensation nLF Tref Cell constant 1 cm AutoRead function AR I D number Ident ...

Страница 51: ...automatically changes to the measuring mode In order to delete all the data records proceed as follows Note The calibration data remain in the storage and can be called up via the calibration protocol 1 Switch off the instrument 2 Press and hold down the STO key 3 Press the on off key The display test appears briefly on the display 4 Confirm the clearing process by pressing run enter Pressing any ...

Страница 52: ...low l The Output data store function page 121 is used to out put calibration data and stored measured values to the in terface l The analog recorder output page 130 is used to output measured values as voltages 4 5 1 Data transmission interval Int 2 The interval for the data transmission Int 2 determines the time interval between automatic data transmissions After the time interval expires the cur...

Страница 53: ...ding to the setting of the storage interval Int1 Set the storage interval Int1 to OFF to activate the data transmission interval Int2 Note You can also set the data transmission interval Int2 in the Configuration menu see page 128 1 Press and hold down the run enter key 2 Press the auto read key Int 2 appears on the display 3 Press to set up the required time interval between storage processes 4 C...

Страница 54: ...t depends on the mea sured parameter and the measuring range Measuring range Voltage Resolution 0 000 1 999 µS cm 0 1999 mV 1 mV 0 00 19 99 µS cm 0 1999 mV 1 mV 0 0 199 9 µS cm 0 1999 mV 1 mV 0 1999 µS cm 0 1999 mV 1 mV 0 00 19 99 mS cm 0 1999 mV 1 mV 0 0 199 9 mS cm 0 1999 mV 1 mV 0 500 mS cm 0 500 mV 1 mV Measuring range Voltage Resolution 0 70 0 0 700 mV 1 mV Measuring range Voltage Resolution ...

Страница 55: ...tput switches automatically to RS232 Note The RS232 interface is not galvanically isolated If it is connected to an earthed PC printer measurements cannot be made in earthed media as this would give incor rect results Set up the following transmission data on the PC printer Baud rate Selectable between 1200 2400 4800 9600 Handshake RTS CTS Xon Xoff PC only Parity None Data bits 8 Stop bits 1 1 CTS...

Страница 56: ...ey Baud rate 1200 2400 4800 9600 Data transmission inter val Int 2 OFF 5 s 10 s 30 s 1 min 5 min 10 min 15 min 30 min 60 min Calibration interval Int 3 1 180 999 d AutoRange ARng yes no TREF 25 TREF 20 t25 or t20 Measured values given as conductivity or resi stance values S cm or MΩ Temperature unit C or F Date time as required 1 Switch off the instrument 2 Press and hold down the ì key 3 Press th...

Страница 57: ...he required baud rate by pressing 5 Confirm with run enter Int 2 appears on the display 6 Set up the required time interval by pressing 7 Confirm with run enter Int 3 appears on the display Baud rate Data transmission interval ...

Страница 58: ...t up the required time interval by pressing 9 Confirm with run enter ARng appears on the display 10 With select between YES and no 11 Confirm with run enter t25 appears on the display Calibration interval ARng AutoRange ...

Страница 59: ... enter LF appears on the display 14 With select between S cm and MΩ 15 Confirm with run enter USE C appears on the display 16 Select between C and F by pressing 17 Confirm with run enter The date flashes on the display Reference temperature Conductivity Temperature unit ...

Страница 60: ...er The year appears on the display 22 Set the current year by pressing 23 Confirm with run enter The hours flash on the display 24 Set the current time by pressing 25 Confirm with run enter The minutes flash on the display 26 Set the current time by pressing 27 Confirm with run enter The instrument changes automatically to the conduc tivity measuring mode Date and time ...

Страница 61: ...alibration data are lost After the parameters have been reset cali brate Configuration parameters The following configuration parameters InI are reset to the values they had on delivery Measuring mode Cell constant 0 475 cm 1 calibrated 0 475 cm 1 set up Temperature compensation nLF Reference temperature Temperature coefficient of the linear temperature com pensation 2 000 K TDS factor 1 00 Baud r...

Страница 62: ...n settings 4 Confirm with run enter The instrument changes to the configuration para meters 5 Toggle between no and yes by pressing yes reset configuration parameters no retain settings 6 Confirm with run enter The instrument changes automatically to the conduc tivity measuring mode Resetting measuring parameters Resetting configuration parameters ...

Страница 63: ...aning disposal 5 1 Maintenance The maintenance tasks are restricted to the following activi ties l replacing the batteries and l replacing the roll of printer paper Note See the relevant operating manual of the electrode for instructions on maintenance ...

Страница 64: ...ns on the batteries Only use leakproof alkaline manganese batteries 1 Open the battery compartment 1 on the underside of the instrument 2 Remove the four batteries from the battery compart ment 3 Insert four new batteries Type Mignon AA into the battery compartment 4 Close the battery compartment 1 The date day flashes on the display 5 Set up the date and time according to chapter 3 COM MISSIONING...

Страница 65: ...iven in the SCHOTT general catalog 1 Switch off the printer Print LED lights up red 2 Open the lid of the printer 1 3 Remove the empty roll of paper 2 4 Insert the new roll of paper Fold the leading edge of the paper inwards and thread it into the printer 3 from underneath Press the feed Print key paper feed 5 Close the lid of the printer 1 1 3 2 ...

Страница 66: ...rument against damage during transport Batteries This note refers to the battery regulation that applies in the Federal Republic of Germany We would ask end consum ers in other countries to follow their local statutory provi sions Note In compliance with 14 of the BATTERY REGULATION we would like to point out that this instrument contains batteries Batteries that have been removed must only be dis...

Страница 67: ...able calibration solution Check calibration solutions Cause Remedy Batteries almost depleted Replace batteries see section 5 1 MAINTENANCE Cause Remedy Operating state undefined or EMC electric stress unallowed Processor reset Press the auto read key and switch on instrument Cause Remedy Timeout of the interface Check connected instrument Error message I Error message LoBat Instrument does not rea...

Страница 68: ...1 or Data transmission Int 2 is switched on Switch off functions see page 121 page 128 Cause Remedy Printer is switched on Switch off printer Interface cable connected Unplug cable Cause Remedy Paper inserted with wrong side upwards Turn the roll of paper around and insert it with the other side upwards Cause Remedy All 200 memory locations are full Output data storage and clear data storage see p...

Страница 69: ... explains abbreviations that appear on the display or when dealing with the instrument Specialist terms The glossary briefly explains the meaning of the specialist terms However terms that should already be familiar to the target group are not described here Index The index helps you find the topics that you are looking for ...

Страница 70: ...l Calibration CELL Cell constant disp Display Output of the data storage on the display E3 Error message see chapter 6 WHAT TO DO IF Ident I D number InI Initialization Resets individual basic functions to the status they had on delivery Int Interval Lin Linear temperature compensation LoBat Low Battery Batteries are almost empty nLF Non linear temperature compensation OFL Overflow Display range e...

Страница 71: ... the data storage to the printer interface Tauto Automatic temperature measurement TC Temperature coefficient TDS Total dissolved solids TP Temperature Probe Temperature measurement active Tref 20 T20 Reference temperature 20 C Tref 25 T25 Reference temperature 25 C C Temperature unit Celsius F Temperature unit Fahrenheit ...

Страница 72: ...onstant Linear factor describing the geometrical dimensions of a measuring cell and its electrodes l With the value of the cell constant you can roughly de scribe the application range of a conductivity measuring cell l The cell constant is determined through calibration in one or several calibration solutions Conductivity The conductivity value is a sum parameter for the ion con centration of a t...

Страница 73: ... temperature has a very strong impact on the electrical conductivity To be able to compare measured values it is necessary to temper or convert the test sample to a refer ence temperature Test sample The substance to be measured It can be liquid or solid Total dissolved solids TDS Mass that remains of the substances dissolved in an aque ous solution after a fixed filtering and drying procedure as ...

Страница 74: ...Lists 150 ...

Страница 75: ...ord 117 data transmission interval 129 date setting 136 display 84 disposal 142 drift control 100 E energy saving feature 97 error messages 143 I initialize 137 interval calibration Int 3 109 storing Int 1 119 K keys 82 L linear temperature compensation 113 115 LoBat 143 M maintenance 139 manual storing 117 measuring 99 measuring precision 109 N no temperature compensation 113 non linear temperatu...

Страница 76: ...recautions 91 salinity 130 salinity measurement 102 sockets 84 storing 117 T TDS 130 TDS total dissolved solids 103 temperature compensation 113 linear 115 non linear 114 setting 113 switch off 116 temperature probe 99 temperature unit 135 time setting 95 time setting 136 total dissolved solids measurement 103 transmit data 128 W What to do if 143 ...

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