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Maintenance and cleaning

LF 170

116

ba54104d09

11/2010

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Summary of Contents for LF 170

Page 1: ...ba54104e09 11 2010 LF 170 Operating instructions Conductivity Monitor mg l 1 1 85 C REL1 5 6 O LF 170 cm S 5 1 5 6 22 nLF AR Tref20 REL1 C...

Page 2: ...etween this operating manual and your instrument Also we cannot guarantee that there are absolutely no errors in this manual Therefore we are sure you will understand that we cannot accept any legal c...

Page 3: ...79 3 3 2 Line power connection 80 3 3 3 Relay contacts and current outputs 81 3 3 4 RS 485 digital interface RS option 81 3 4 Connecting a conductivity measuring cell 82 3 4 1 Measuring cell types and...

Page 4: ...4 8 Display of instrument information 110 4 9 Test mode 111 5 Maintenance and cleaning 115 5 1 Maintenance 115 5 2 Cleaning 115 6 What to do if 117 7 Accessories 119 8 Technical data 121 8 1 General...

Page 5: ...09 11 2010 1 Overview 1 1 General features Fig 1 1 LF 170 1 Watertight housing IP 66 2 Display 3 Operating keys 4 Sensor input socket 5 Cable glands mg l 1 1 85 C REL1 5 6 O LF 170 cm S 5 1 5 6 22 nLF...

Page 6: ...ls z As an indicator relay for a frozen measured value e g when calibrating z As a threshold indicator if a specified threshold is undercut or exceeded main measured value z As a control relay with ti...

Page 7: ...ave principle A total of 31 slave devices can be connected to one master in the bus network All slave devices are addressed by the control computer under their bus address and execute the transferred...

Page 8: ...Overview LF 170 74 ba54104d09 11 2010...

Page 9: ...g CAUTION indicates the severity of the danger WARNING indicates instructions that must be followed precisely in order to prevent serious danger to personnel CAUTION indicates instructions that must...

Page 10: ...HNICAL DATA It left the factory in perfect condition Function and operational safety The flawless functioning of the LF 170 monitor is only guaranteed if attention is paid to the generally accepted sa...

Page 11: ...z Also seal all cable glands that are not required with matching dummy plugs Installation on a wall or under a protective cover The instrument is mounted on a wall or under a protective cover through...

Page 12: ...d c b a Rec2 L1 N K2 K1 RS Option Sensor Probe Rec1 Netz Mains c Option b a X2 X1 13 12 11 11 10 10 9 9 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 No X1 X2 1 RS 485 A RS option Current output REC1 2 RS 485 B RS...

Page 13: ...ing to the terminal strip z Any wires that are not used and project into the housing must be cut off as closely as possible to the cable gland Seal all open cable glands with matching blind plugs WARN...

Page 14: ...cations given on the nameplate and in chapter 8 TECHNICAL DATA z A switch or circuit breaker must be provided in the building installation as an interrupt facility for the monitor The interrupt facili...

Page 15: ...physical contact must only be connected when they are voltage free z Switching voltages and switching currents on the relay contacts must not exceed the values specified in chapter 8 TECHNICAL DATA Pr...

Page 16: ...z LRD 01 z LRD 325 Connection Connect the plug adapter of the sensor connection cable with the sensor input jack of the monitor Measuring cell Connection type Connection cable adapter See page TetraCo...

Page 17: ...pin plug This section describes the connection of the following conductivity measuring cells z TetraCon 325 z TetraCon 325 C z LR 325 01 z LR 325 001 z TetraCon DU T with KKDU 325 connection cable z T...

Page 18: ...6 as a cable extension between the conductivity measuring cell and the monitorand the K 160 cable plug order no 109 508 The maximum cable length between the electrode and monitor including the length...

Page 19: ...Measured conductivity value operator guidance 2 Sensor symbol 3 Lower display line Measured temperature value operator guidance 4 Status displays depending on instrument status and operating situation...

Page 20: ...Call up measuring mode M Start calibration only active in measuring mode C In measuring mode Display the sensor slope Confirm current selection ENTER Leave the menu ESC Increase the value scroll upwa...

Page 21: ...Configuration level The functions of the monitor are defined in this level The configuration is carried out after the installation of the instrument mostly only during the initial commissioning Passwo...

Page 22: ...word prompt appears When delivered no password protection is set up In this case proceed to the next operating step by pressing ENTER three times If password protection is set up the password must be...

Page 23: ...confirm this with ENTER After that you reach the next setting z Certain settings or choices are only available with specific instrument variants or depend on other preceding configuration settings Set...

Page 24: ...sor type CFu z z SAL Conductivity or salinity Sal measuring mode 700 TetraCon 700 SW 600 TetraCon 600 300 TetraCon 300 10 Cell with cell constant 10 cm 1 1 Cell with cell constant 1 cm 1 1 Cell with c...

Page 25: ...tput measured conductivity value After confirming the reC or Sal selection with ENTER you can adapt the upper and lower final value Operating notes The setting is carried out in the order upper final...

Page 26: ...continues on the next page Setting Selection Values Explanation values in bold typeface values on delivery Upper final value 0 000 S cm Lower final value 1 999 S cm Upper final value 2 00 19 99 S cm...

Page 27: ...put temperature value After confirming the reC C selection with ENTER you can adapt the upper and lower final value Operating notes The setting is carried out in the order upper final value lower fina...

Page 28: ...s for which relay the setting has just been made Neither relay has a function when it is delivered nF CRF REL 1 2 only with RT and RT RS option z 0 z C Switching behavior of the freely configurable re...

Page 29: ...DOWN 2 Press ENTER 3 The menu for the password prompt appears When delivered no password protection is set up In this case proceed to the next operating step by pressing ENTER three times If password...

Page 30: ...hed by subsequently pressing ENTER z In the entry level select the desired value from the selection in each case with UP DOWN and confirm this with ENTER This puts the setting into effect and you go t...

Page 31: ...ce values on delivery PR1 z 4 20 z 0 20 or dI 1 dI 20 Current range and attenuation of the REC 1 current output in rEC operating mode analog output Operating notes The setting is carried out in the or...

Page 32: ...rization of the RS 485 interface is described in a separate manual that is included in the scope of delivery of the instrument variant with RS 485 interface RT RS option PCd 000 999 Password against u...

Page 33: ...perature differences of more than 10 C for at least one hour with occasional stirring so that the temperatures equalize Carry out the balancing Press ENTER Set the measured temperature value upper dis...

Page 34: ...adjustable temperature coefficients No temperature compensation Operating note Pressing the UP DOWN runs through all options as follows PCS tr REL 1 2 tc th only with RT and RT RS option depending on...

Page 35: ...elay is active when the measured value is frozen e g during a calibration The relays can be configured as normally closed or normally open UL LL Limits UL Sal LL Sal UL C LL C The relay can be set as...

Page 36: ...ing to the selected switching behavior Limit indicators can be used in the following way z Monitoring a limiting value using a relay When a limiting value upper or lower limiting value is exceeded or...

Page 37: ...is HS that was set for the limit value is exceeded undercut The switching delay td for the limit value is started If the limit value including the hysteresis is still exceeded undercut and the switchi...

Page 38: ...TER Set the other digits in the same way HS 0 to 10 of the measuring range Hysteresis Difference between switching point and limit value if the measured value moves away from the limit value Operating...

Page 39: ...The starting time of all subsequent cleaning processes is moved back according to the delay Setting Selection Values Explanation Tr 1 168 hours Time interval between two cleaning processes tc 10 300 s...

Page 40: ...For an active relay the REL 1 or REL 2 status display appears in the operating level Depending on the selected switching behavior the relay contact is either open or closed Fig 4 3 Display of the rela...

Page 41: ...and used for all future measurements Setting range The setting range for the cell constant depends on the sensor type see configuration setting CIn Process In order to determine the cell constant the...

Page 42: ...wer line The selected cell constant 3 If the measured conductivity deviates from the set value 1413 S cm the cell constant can be changed until the set value or the nearest possible value is displayed...

Page 43: ...y value remain frozen Remedial measures z Clean the measuring cell see measuring cell operating manual z Check the conductivity control standard and renew if necessary z Then repeat the checking setti...

Page 44: ...ARAMETERIZATION LEVEL z Cell constant z Process for temperature compensation z Software version Viewing the cell constant and software version To call up the selected cell constant press ENTER in the...

Page 45: ...the same time Note To leave the test mode again at any time press M or C 2 Press ENTER The set password is displayed 000 password protection deactivated 3 Proceed to the next test item with ENTER Test...

Page 46: ...DOWN 7 Proceed to the next test item with ENTER Test the relays only with RT and RT RS option 8 Press ENTER The tSt display flashes Now individual relays can be manually switched on and off Switch rel...

Page 47: ...DOWN 7 Proceed to the next test item with ENTER Test the relays only with RT and RT RS option 8 Press ENTER The tSt display flashes Now individual relays can be manually switched on and off Switch rel...

Page 48: ...nt back again Special commands The monitor sends the instrument identification according to the RS command RSID with RS 485 protocol with ESC The monitor sends the instrument identification according...

Page 49: ...2 Cleaning Occasionally wipe the outside of the measuring instrument with a soft damp cloth CAUTION Do not use high pressure water blasters for cleaning danger of water penetration Also do not use agg...

Page 50: ...Maintenance and cleaning LF 170 116 ba54104d09 11 2010...

Page 51: ...ivity measuring cell acc to operating manual Control standard soiled Use new control standard Only immerse clean and virtually dry conductivity measuring cell in the control standard Note Only ever us...

Page 52: ...n in the operating manual of the conductivity measuring cell Incorrect reference temperature set Correct set reference temperature Cause Remedy Cause Remedy When wiring with the flow control its switc...

Page 53: ...ssories Cable and terminal box for cable extension Note More accessories are available in the WTW catalog or on the Internet under www WTW com Description Model Order no Cable plug K170 109 508 Cable...

Page 54: ...Accessories LF 170 120 ba54104d09 11 2010...

Page 55: ...chnical data 8 1 General data Dimensions Fig 8 1 Dimension drawing of the LF 170 dimensions in mm Test certificates CE 222 105 202 Side view Front view Rear view approx 238 198 178 LF 296 mg l 1 1 85...

Page 56: ...2 2 kg Type of protection IP 66 Temperature Operation 25 C 55 C 13 131 F Storage 25 C 65 C 13 149 F Relative humidity Yearly average 90 Dew formation Possible Supply voltage Protective class II Overv...

Page 57: ...ack on the underside of the housing Screwless plug in connections in the housing using cable glands Connection cross section 0 5 2 5 mm2 Cable feeds 4 cable glands PG 13 5 terminal range 10 14 mm Rela...

Page 58: ...sured conductivity value 1 x analog output for measured temperature value RT and RT RS option Attenuation adjustable EN 61326 EMC requirements for electrical resources for control technology and labor...

Page 59: ...cm Auto automatic meas range selection Resolution Depending on the measurement range 0 001 S cm 1 mS cm Accuracy 0 5 of measured value 1 digit reference temperature Adjustable 25 C or 20 C Calibratio...

Page 60: ...or a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial...

Page 61: ...t of the configuration level Crn Measuring mode and range CR1 Current output 1 CR2 Current output 2 rEC Analog output Crc Relay function nF No function PS Mains voltage monitoring FRC Signaling relay...

Page 62: ...puts Miscellaneous PtF Temperature compensation uAr Variable cell constant nLF Nonlinear function PCS Cleaning system UL Upper limit LL Lower limit HS Hysteresis td Switching delay Tr Cleaning interva...

Page 63: ...etermined It is given as a combination of the numerical value and unit e g 3 m 0 5 s 5 2 A 373 15 K Measuring system The measuring system comprises all the devices used for measuring e g meter and sen...

Page 64: ...converted to a defined reference temperature For potentiometric measurements the slope value is adjusted to the temperature of the test sample but the measured value is not converted Temperature funct...

Page 65: ...g mode 90 N Nameplate 73 O Operating level 87 Operational safety 76 Outdoor mounting 77 P Parameterization level 87 Password Entry 88 95 Setting 98 PROFIBUS connection 73 R Relay Display on the measur...

Page 66: ...Index LF 170 132 ba54104e09 11 2010...

Page 67: ......

Page 68: ...Wissenschaftlich Technische Werkst tten GmbH Dr Karl Slevogt Stra e 1 D 82362 Weilheim Germany Tel 49 0 881 183 0 49 0 881 183 100 Fax 49 0 881 183 420 E Mail Info WTW com Internet http www WTW com...

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