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Liquisys M CLM223/253

Commissioning

Hauser

R239

Enter maximum

pulse frequency of
the adjuster

120 min

-1

60 to 180 min

-1

This field only appears if pulse frequency
is selected in R237. If pulse length is
selected, R239 is skipped and entries

continue with R2310.

R2310 Enter minimum

switch-on time t

0.3 s

0.1 to 5.0 s

This field only appears if pulse length is

selected in R237.

R2311 Enter basic load

0 %

0 to 40 %

When you select the basic load, you enter
the desired dosing quantity.
100% basic load would correspond to:
– Constantly on for R237 = len
– Fmax at R237 = freq (field R239)

– 20 mA at R237 = curr

R2 (4)

Configure cleaning
function (timer)

LC PV = limit contactor cond
(1)

LC °C = limit contactor T (2)
PID controller (3)

Timer (4)

Clean = Chemoclean (5)
USP (6)
EP PW (7)

Cleaning only takes place with one
cleaning agent (usually water); see Fig.
41).

By confirming with ENTER, another relay
function already switched on is switched
off and its settings are reset to the factory

settings.

R241

Switch function of

R2 (4) off or on

Off

R242

Enter rinsing/
cleaning time

30 s

0 to 999 s

Settings for Hold and relay are active for
this time.

R243

Enter pause time

360 min

1 to 7200 min

The pause time is the time between two

cleaning cycles (see "Timer for cleaning
function" section).

R244

Enter minimum
pause time

120 min

1 to R243 min

The minimum pause time prevents
constant cleaning if a cleaning trigger is
present.

R2 (5)

Configure cleaning

with Chemoclean
(for version with four
contacts ,

Chemoclean option
and contacts 3 and 4
assigned)

LC PV = limit contactor cond
(1

)

LC °C = limit contactor T (2)

PID controller (3)
Timer (4)

Clean = Chemoclean (5)

USP (6)
EP PW (7)

See "Chemoclean function" section.
By confirming with ENTER, another relay
function already switched on is switched

off and its settings are reset to the factory
settings.

Coding

Field

Setting range
(Factory settings, bold)

Display

Info

R239

min

Max

PFreq

120

R2310

Min.PTime

0.3

R2311

BasicLoad

Sel

Type

Timer

R241

Function

off

R242

RinseTime

R243

min

PauseTime

360

R244

min

Min

Pause

120

Sel

Type

Clean

Содержание Liquisys M CLM223/253

Страница 1: ...Products Solutions Services BA193C 07 EN 14 13 71212629 valid as of software version 2 33 Operating Instructions Liquisys M CLM223 253 Transmitter for Conductivity...

Страница 2: ...erious injury WARNING Cause consequences Consequences if safety message is not heeded Corrective action This symbol alerts you to a dangerous situation Failure to avoid the situation can result in a f...

Страница 3: ...27 5 3 2 Operating concept 28 6 Commissioning 30 6 1 Function check 30 6 2 Switching on 30 6 3 Quick start up 32 6 4 System configuration 35 6 4 1 Setup 1 Conductivity 35 6 4 2 Setup 2 Temperature 36...

Страница 4: ...223 253 4 Endress Hauser 11 Technical data 99 11 1 Input 99 11 2 Output 100 11 3 Power supply 103 11 4 Performance characteristics 104 11 5 Environment 104 11 6 Mechanical construction 105 12 Appendix...

Страница 5: ...sewage treatment plants Chemical industry Food industry Pharmaceutical industry Any other use than the one described here compromises the safety of persons and the entire measuring system and is ther...

Страница 6: ...s symbol alerts you to possible faults which could arise from incorrect operation They could cause damage to the instrument if ignored Note This symbol indicates important items of information Direct...

Страница 7: ...r supplier or your local sales center 2 2 Scope of delivery The delivery of the field instrument includes 1 transmitter CLM253 1 plug in screw terminal 1 cable gland Pg 7 1 cable gland Pg 16 reduced 2...

Страница 8: ...of your device enter the order code indicated on the nameplate in the search screen at the following address www products endress com order ident 2 4 Certificates and approvals 2 4 1 CE mark Declarati...

Страница 9: ...smitter as explained in the Commissioning section 3 1 1 Measuring system A complete measuring systems comprises The transmitter Liquisys M CLM223 or CLM253 A sensor with or without an integrated tempe...

Страница 10: ...during air freight dispatching Make sure no moisture penetrates the inside of the housing before the cable installation The housing is completely air tight after the cable installation CAL REL REL1 R...

Страница 11: ...Liquisys M CLM223 253 Mounting Endress Hauser 11 3 2 2 Panel mounted instrument a0005735 Fig 4 Panel mounted instrument 90 3 54 139 5 47 96 3 78 6 0 24 mm inch 92 3 62 149 5 5 89...

Страница 12: ...ions rain snow direct sun etc Impaired operation to complete transmitter failure When installing outside always use the weather protection cover accessory Transmitter wall mounting a0005736 Fig 5 Wall...

Страница 13: ...see Accessories section a0005737 Fig 6 Post mounting field device to cylindrical pipes For post mounting the transmitter proceed as follows 1 Guide the two securing screws 1 of the mounting kit throu...

Страница 14: ...acquired as accessories see Accessories section a0005738 Fig 7 Mounting field device with universal posts and weather protection cover For mounting the weather protection cover proceed as follows 1 S...

Страница 15: ...nel mounted instrument 1 Wall of the cabinet 2 Seal 3 Clamping screws Required installation depth 3 4 Post installation check After installation check the transmitter for damage Check whether the tran...

Страница 16: ...d must adhere to them Prior to beginning any wiring work make sure voltage is not applied to any of the cables 4 1 Wiring 4 1 1 Connecting supply voltage NOTICE The device does not have a power switch...

Страница 17: ...r conductive Sensor inductive Temperature sensor Signal output 1 conductivity Signal output 2 variable Binary input 1 Hold Binary input 2 Chemoclean Aux voltage output I J K L M N O Alarm current free...

Страница 18: ...istributor rail or the ground terminal The circuits E and H are not galvanically isolated from each other Field instrument connection Guide the measuring cables through the PG glands into the housing...

Страница 19: ...eened special measuring cables to connect conductivity sensors to the transmitter The following multi core and ready to use cable types can be used Sensor type Cable Extension Two electrode sensors wi...

Страница 20: ...uring cable connection Proceed as follows to connect a conductivity sensor to the field instrument 1 Open the housing cover to access the terminal block in the connection compartment 2 Break the punch...

Страница 21: ...ctive sensors a0008918 Fig 14 Connection of inductive sensors a0006415 Fig 15 Recommended fail safe switching for the alarm contact A Normal operating status B Alarm condition Normal operating status...

Страница 22: ...ansmitter or the cable externally damaged Visual inspection Electrical connection Remarks Are the installed cables strain relieved No loops and cross overs in the cable run Are the signal cables corre...

Страница 23: ...read the relevant sections in the additional Operating Instructions PROFIBUS PA DP field communication for Liquisys M CXM223 253 BA00209C 07 EN HART field communication for Liquisys M CXM223 253 BA00...

Страница 24: ...r 1 2 3 4 5 6 7 Indicator for measuring mode normal operation Indicator for calibration mode Indicator for setup mode configuration Indicator for Hold mode current outputs remain at last current state...

Страница 25: ...onfiguration section Configuration of parameters and numerical values Operation of the relay in manual mode In the measuring mode you get the following sequence of functions by repeatedly pressing the...

Страница 26: ...the end of calibration if calibrating If you press the PLUS and MINUS key again you return to the measuring mode Locking the keyboard Press the PLUS and ENTER key for at least 3 s to lock the keyboar...

Страница 27: ...ignalled in the manual mode 1 The transmitter is in Automatic mode The top LED beside the AUTO key is lit 2 Press the AUTO key 3 To enable the manual mode enter the code 22 via the PLUS and MINUS keys...

Страница 28: ...een different codes Key CAL Code 22 access to Calibration and Offset menu Key ENTER Code 22 access to the setup menus Keys PLUS ENTER locks the keyboard Keys CAL MINUS unlocks the keyboard Key CAL or...

Страница 29: ...3xx 19 06 00 xx 002 eps Fig 19 Diagram of the menu structure 1 Functions parameters selected numbers entered 2 Function groups scroll backwards and forwards with the PLUS and MINUS keys 3 Switch from...

Страница 30: ...nsor must be calibrated so that the measuring system can return precise measurement data Then perform the first configuration in accordance with the instructions in the Quick start up section The valu...

Страница 31: ...ions in the individual groups are counted from the top to the bottom and from the left to the right Function Factory setting Type of measurement Conductive conductivity measurement Temperature measure...

Страница 32: ...Service function group 7 Press S until you get to the Setup 1 function group 8 Press F to be able to make your settings for Setup 1 9 In A1 select the desired mode of operation e g cond conductive Pre...

Страница 33: ...tup 2 none lin linear NaCl common salt IEC 60746 Pure ultra pure water NaCl PureH ultra pure water HCl Tab table 20 In B3 enter the temperature coefficient Press F to confirm 2 1 K 0 0 20 0 K 21 The r...

Страница 34: ...enter the conductivity corresponding to the minimum current value at the transmitter output e g 0 S cm Press F to confirm cond ind 0 00 S cm MOhm 0 00 k cm Conc 0 00 Temp 0 00 C 29 In O313 enter the...

Страница 35: ...ly with Plus Package XX xx X xxx XXX x XXXX A3 only active if A1 conc A4 Select unit to be displayed auto S cm mS cm S cm S m mS m S m k cm M cm k m When auto is selected the maximum resolution possib...

Страница 36: ...l compensation Ultrapure water compensation HCl acid compensation Temperature compensation with table Linear temperature compensation The change between two temperature points is considered to be cons...

Страница 37: ...lowest indicated conductivity is the theoretical limit value of ultrapure water at 25 C 77 F i e 0 055 S cm Temperature compensation with table In case of transmitter with Plus package you can enter a...

Страница 38: ...yed for concentration measurement Pure and PureH are only available for conductive devices B3 Enter temperature coefficient 2 10 K 0 00 to 20 00 K Only if B2 lin With other settings in B2 field B3 has...

Страница 39: ...y in an open outlet is completely independent of the flow in the main stream This permits signalling of an alarm condition in the main stream flow too low or has completely stopped and triggers dosing...

Страница 40: ...measure the flow rate of the medium This flow rate value 0 4 to 20 mA you apply as feedforward control to the PID controller Feedforward control is a multiplying function as illustrated in the figure...

Страница 41: ...ed period Z4 Enter the switch off limit value for the current input 50 0 to 100 0 to 100 corresponds to 4 to 20 mA at the current input Observe measured value assignment to the current output of the f...

Страница 42: ...this current output In addition you can also simulate a current output value O3 2 to check the current outputs If a second current output is present you can output the controller actuating variable i...

Страница 43: ...e following blank table with a pencil Calculate the resulting signal distance per mA to observe the necessary minimum slope Then enter the values in the device Current output 1 Current output 2 Value...

Страница 44: ...Select current range 4 to 20 mA 0 to 20 mA O312 0 4 mA value Enter corresponding measured value cond ind 0 00 S cm MOhm 0 00 k cm Conc 0 00 Temp 0 00 C Here you can enter the measured value at which t...

Страница 45: ...l run through as many times as correspond to the value in O332 Assign appears as the last step After confirmation the system jumps to O336 O334 Enter x value cond ind 0 00 S cm MOhm 0 00 k cm Conc 0 0...

Страница 46: ...hed off in F5 If 0 20 mA was selected in O311 2 4 mA may not be used F5 Select error 1 1 to 255 Here you can select all the errors which should trigger an alarm The errors are selected via the error n...

Страница 47: ...he measuring signal change within an hour is smaller than 0 5 of full scale value of the selected measuring range an alarm E152 is triggered The reason for such sensor behaviour can be contamination c...

Страница 48: ...the error delay in min or s Only after this delay does a high or low limit violation cause an alarm as per field P4 P5 P4 Enter lower alarm threshold 0 S cm 0 to 9999mS cm P5 Enter upper alarm thresho...

Страница 49: ...ons can be used both for conductivity measurement and for temperature measurement Please refer to Fig 29 for a clear illustration of the relay contact states When the measured values increase maximum...

Страница 50: ...e quick changes and where peaks are to be corrected PID controller Is used for processes where a P PI or PD controller does not control sufficiently Configuration options of the PID controller The fol...

Страница 51: ...circuit further Increase the control gain Kp until the controlled variable just starts to overshoot Reduce Kp slightly and then reduce the integral action time Tn so that the shortest possible correct...

Страница 52: ...for 60 min 1 and approx 170 ms for 180 min 1 Outputs with pulse frequency modulation are used to activate directly controlled solenoid dosing pumps Constant controller Via the current output 2 the min...

Страница 53: ...sible to clean irregularly with different repeat cycles and to separately set the cleaning times with post rinse times Pay attention to the following To use the Chemoclean function the transmitter has...

Страница 54: ...as follows The transmitter determines the uncompensated conductivity and the water temperature The transmitter rounds off the temperature to the next smaller 5 C step and compares the actual measured...

Страница 55: ...eneration of the system Enter the value in field R262 or R272 Pay attention to the following To use the USP and EP functions the transmitter has to be equipped with a relay board and the Plus Package...

Страница 56: ...2 Enter the switch on point of the contact cond ind 9999 mS cm MOhm 200 M cm conc 9999 Never set the switch on point and the switch off point to the same value Only the operating mode selected in A1 i...

Страница 57: ...contact switch off point switch on point or a Min contact switch off point switch on point thereby implementing a hysteresis that is constantly required see Illustration of the alarm and limit functi...

Страница 58: ...I component is set to zero Although Hold can be deactivated in field S2 this does not apply for Chemoclean and timer R235 Enter derivative action time Tv 0 0 no D component 0 0 min 0 0 to 999 9 min Se...

Страница 59: ...its settings are reset to the factory settings R241 Switch function of R2 4 off or on Off On R242 Enter rinsing cleaning time 30 s 0 to 999 s Settings for Hold and relay are active for this time R243...

Страница 60: ...s Rinsing with water takes place R256 Enter number of repeat cycles 0 0 to 5 R253 to R255 is repeated R257 Enter pause time 360 min 1 to 7200 min The pause time is the time between two cleaning cycle...

Страница 61: ...e alarm threshold Enter drop out delay 0 s 0 to 2000 s R2 7 Configure EP PW contact LC PV limit contactor cond 1 LC C limit contactor T 2 PID controller 3 Timer 4 Clean Chemoclean 5 USP 6 EP PW 7 The...

Страница 62: ...value pairs can be entered in the table These are numbered from 1 to 10 and can be edited individually or in sequence T3 Select table value pair 1 1 to number of table value pairs assign The function...

Страница 63: ...ature If the variable process temperature should be taken into account for concentration measurement you must measure the conductivity of each created sample at two different temperatures at least ide...

Страница 64: ...t of measuring range with sufficient accuracy and without an error message Enter the values in the order of increasing concentration see the following example The setups for temperature compensation i...

Страница 65: ...Enter number of reference triplets 1 1 to 10 Each triplet consists of three numeric values K5 Select triplet 1 1 to number of triplets in K4 assign Any triplet can be edited If assign go to K9 K6 Ent...

Страница 66: ...ter SW upgrade release code Plus Package 0000 0000 to 9999 The code is located on the nameplate If an incorrect code is entered you are taken back to the measurement menu The number is edited with the...

Страница 67: ...Factory settings bold Display Note E E H SERVICE function group Information on the device version E1 Select module Contr controller 1 Trans transmitter 2 Main power unit 3 Rel relay module 4 E111 E121...

Страница 68: ...d Setting range Factory settings bold Display Info I INTERFACE function group Communication settings only for device version HART or PROFIBUS I1 Enter bus address Address HART 0 to 15 or PROFIBUS 0 to...

Страница 69: ...he display Repeat calibration The instrument is automatically switched to hold during calibration factory setting After calibration the system jumps back to the measuring mode During the hold dwell pe...

Страница 70: ...ature MTC 25 C 35 0 to 250 0 C Only exists if B1 fixed C122 Enter value of calibration solution 2 10 K 0 00 to 20 00 K This value is specified in the Technical Information of all E H calibration solut...

Страница 71: ...s You can also use the printed on table to calculate the value Set to 0 for calibration with uncompensated values C133 Enter correct conductivity value of the calibration solution current measured val...

Страница 72: ...ement parameter specific device software 4 If the error persists send in the device for repair to your local service organisation or replace the device Yes No 2 0C 0C E002 Instrument not calibrated ca...

Страница 73: ...contactor 2 Yes No No 80 80 E069 Set point exceeded limit contactor 3 Yes No No 80 80 E070 Set point exceeded limit contactor 4 Yes No No 80 80 E071 Inaccurate measurement polarization Clean sensor ch...

Страница 74: ...al value exceeds alarm threshold CC setpoint for longer than the set permissible maximum period Yes No No E162 Dosage stop Check settings in the CURRENT INPUT and CHECK function groups Yes No No E171...

Страница 75: ...e measured values in general continuous measured value overflow measured value always 000 measured value too low measured value too high measured value frozen incorrect current output value Short circ...

Страница 76: ...ut and measuring input lines Interference currents in medium Eliminate source of interference or ground medium close to sensor With conductive sensors Electromagnetic interferences on signal lines Use...

Страница 77: ...s package functions not available Live Check current curve 2 to 4 alpha value curve 2 to 4 user conc curve 1 to 4 Plus package not enabled enable with code that depends on serial number and is receive...

Страница 78: ...253 Commuwin CW II Incompatible CW II and instrument software versions No or incorrect DD DLL Incorrect baud rate setting for segment coupler in DPV 1 server Incorrect station master addressed or dupl...

Страница 79: ...isplay dark light emitting diode active Central module defective module LSCH LSCP Renew central module note variant On site diagnosis by Endress Hauser Service test module necessary Display is on but...

Страница 80: ...the Plus package Additional functions Plus package and or Chemoclean missing after LSCH LSCP module replaced Replacement modules LSCH or LSCP have the device serial number 0000 when they leave the fa...

Страница 81: ...ehand at PE or permanent grounding with a wrist strap For your own safety use only genuine spare parts With genuine spare parts the function accuracy and reliability are also guaranteed after repair 8...

Страница 82: ...hen rinse thoroughly with plenty of clear water Buildup containing proteins e g food industry Use a mixture of hydrochloric acid 0 5 and pepsin commercially available and then rinse thoroughly with pl...

Страница 83: ...ere k 0 01 or k 0 1 cm 1 three line system Resistance R Cell constant k Display for conductivity Display for M 10 1 cm 1 100 mS cm 10 cm 1 1000 mS cm 100 0 1 cm 1 1 mS cm 1 k cm 1 cm 1 10 mS cm 10 cm...

Страница 84: ...ends on the sensor type CLS50 and CLS52 Display conductivity mS cm k cm 1 1 R k CLS54 Display conductivity mS cm k cm 1 1 R k 1 21 Values for simulation with CLS50 at 25 C 77 F Values for simulation w...

Страница 85: ...specifications apply to the CLS50 CLS52 and CLS54 sensors The sensor lines on the instrument or junction box are to be disconnected for all tests described here Testing transmitting and receiving coi...

Страница 86: ...from the conductivity sensor sensor connector to the measuring instrument via an extension Connect the decade resistors simply with the service kit Conductivity Test Adapter order no 51500269 Check ju...

Страница 87: ...l block item 420 b from the rear of the device to de energize the device 2 Then remove the terminal blocks item 420 a and pos 430 from the rear of the device Now you can disassemble the device 3 Press...

Страница 88: ...are parts of the panel mounted instrument You can take the spare parts and the corresponding order number from the following section using the item numbers a0008913 Fig 38 Exploded view of panel mount...

Страница 89: ...ler LSCP PA PROFIBUS PA no current output 51501221 91 Central module ind controller LSCP DP PROFIBUS DP no current output 51502501 91 Kit CLM2x3 Central module ind PROFIBUS DP LSCP DP Central module P...

Страница 90: ...20 Bend the module locks out and remove the modules 6 To remove the docking module item 340 remove the screws in the housing base item 450 c and remove the entire module from above 7 Proceed as follow...

Страница 91: ...u can take the spare parts and the corresponding order number from the following section using the item numbers a0008916 Fig 39 Exploded drawing of field instrument 100 V Pos 10 Netzteil 100 230 V AC...

Страница 92: ...ller LSCP PA PROFIBUS PA no current output 51501221 91 Central module ind controller LSCP DP PROFIBUS DP no current output 51502501 91 Kit CLM2x3 Central module ind PROFIBUS DP LSCP DP Central module...

Страница 93: ...fields E115 year one digit E116 month one digit E117 consecutive number four digit In the field E118 the complete number is displayed again so you can check it is correct You can only enter the seria...

Страница 94: ...y is required to follow certain procedures when handling returned products that are in contact with medium To ensure swift safe and professional device returns please read the return procedures and co...

Страница 95: ...ation TI00227C 07 EN Condumax W CLS19 Conductive conductivity sensor for pure and ultra pure water applications Ordering acc to product structure www products endress com cls19 Technical Information T...

Страница 96: ...le extension via junction box VBM sold by the metre order no 50085473 Junction box VBM For cable extension 10 terminals Cable entries 2 x Pg 13 5 or 2 x NPT Material aluminum Ingress protection IP 65...

Страница 97: ...005742 Fig 41 Universal post Post mounting kit For mounting of field housing on horizontal or vertical pipes max 60 mm 2 36 Material stainless steel 1 4301 order no 50086842 a0005676 Fig 42 Post mount...

Страница 98: ...urrent input Order no 51504304 Four relay card with current input Order no 51504305 10 5 Calibration solutions Precision calibration solutions acc to SRM Standard reference material of NIST reference...

Страница 99: ...Resistivity 0 to 200 M cm Concentration 0 to 9999 ppm mg l TDS Temperature 35 to 250 C 31 to 482 F Cable length conductive conductivity max 100 m 328 ft CYK71 resistivity max 15 m 49 ft CYK71 Cable le...

Страница 100: ...Galvanic isolation yes IO Module PROFIBUS DP Signal coding RS485 Data transfer rate 9 6 kBd 19 2 kBd 93 75 kBd 187 5 kBd 500 kBd 1 5 MBd Galvanic isolation yes IO Module Conductivity Resistivity Conce...

Страница 101: ...witching power with inductive load cos 0 4 max 500 VA AC 60 W DC Pickup dropout delay 0 to 2000 s Function adjustable pulse length pulse frequency controller Controller response PID Control gain Kp 0...

Страница 102: ...Ident number 1515h Device revision 11h Profile version 2 0 GSD files www products endress com profibus GSD file version Output values Main value temperature value Input values Display value of PLC Fe...

Страница 103: ...7 5 VA Mains protection Fine wire fuse medium slow blow 250 V 3 15 A HART Supply voltage n a active current outputs Integrated reverse voltage protection n a active current outputs PROFIBUS PA Supply...

Страница 104: ...door use Relative humidity 10 to 95 non condensing Pollution degree The product is suitable for pollution degree 2 Conductivity Temperature depending on the measuring range 0 001 S cm to 1 999 S cm an...

Страница 105: ...6 x 145 mm 3 78 x 3 78 x 5 71 inches Installation depth approx 165 mm 6 50 Field instrument 247 x 170 x 115 mm 9 72 x 6 69 x 4 53 inches Panel mounted instrument max 0 7 kg 1 5 lb Field instrument max...

Страница 106: ...omitted if B1 fixed Current offset 5 0 5 0 C B6 Calibration temperature entry if B1 fixed 35 0 250 0 C 25 0 C C121 Entry of a value of calibration solution 0 00 20 00 K a 2 10 K C122 Entry of correct...

Страница 107: ...36 Entry of reference temperature 25 C 35 250 C B7 x value entry measured value entire measuring range 0 S cm 0 k cm 0 0 C W O334 Z7 Feedforward control 1 at 0 100 50 F7 F8 F9 P7 P8 P9 Set monitoring...

Страница 108: ...s displayed E123 E124 Software version SW version E111 Hardware version HW version E112 Serial number is displayed E113 E114 Function group SERVICE S Language selection GER ITA FRA ESP NEL ENG S1 Hold...

Страница 109: ...max pulse frequency 60 180 1 min 120 1 min R239 Entry of pulse interval 0 5 999 9 s 10 0 s R238 Set minimum pause time 1 R357 min 120 min R258 Entry of post rinse time 0 999 s 20 s R255 Number of rep...

Страница 110: ...eneral purpose 8 Current input 39 99 Current outputs 42 D Declaration of conformity 8 Designated use 5 Diagnosis code 72 Dimensions 105 Dismantling Field instrument 90 Panel mounted instrument 87 Disp...

Страница 111: ...er supply 103 Product safety 6 Protocol specific data 102 Q Quick 9 Quick commissioning 32 Quick setup 32 Quick start up 32 R Reference temperature 104 Relative humidity 104 Relay contact configuratio...

Страница 112: ...www addresses endress com 71212629...

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