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Oxi 170

Operation

97

ba24105e08

11/2010

Example:

Monitoring of limit

values with one or two

relays

Fig. 4-2

Switching points of relays working as limit indicators

The selected limit value (UL/LL) is exceeded/undercut.

The hysteresis 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 switching delay for the limit value has expired
the relay switches.

Time

Measured value

UL

LL

Hysteresis HS1

Hysteresis HS1

Relay 1

td2

td2

td1

td1

Hysteresis HS2
Hysteresis HS2

Relay 2

Relay 2

Time

Relay state

Relay 1

on

on

off

off

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Summary of Contents for Oxi 170

Page 1: ...ba24105e08 11 2010 Oxi 170 Operating instructions Oxygen Monitor Oxi 170 O mg l 1 1 85 C REL1 5 6 ...

Page 2: ... between 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 claims resulting from the data figures or descriptions Copyright Weilheim 2010 WTW GmbH Reprinting even as excerpts is only allowed with the explicit written authorization of WTW GmbH Weilheim Printe...

Page 3: ...74 3 3 Electrical connection 75 3 3 1 General installation instructions 75 3 3 2 Line power connection 76 3 3 3 Relay contacts and current outputs 77 3 3 4 RS 485 digital interface RS option 77 3 4 Connecting the sensors 78 3 4 1 Connecting the oxygen D O sensor 78 3 4 2 Cable extension 79 4 Operation 81 4 1 Display 81 4 2 Operating keys 82 4 3 Operating levels and general operating principles 83 ...

Page 4: ...Display of instrument information 103 4 9 Test mode 104 5 Maintenance and cleaning 107 5 1 Maintenance 107 5 2 Cleaning 107 6 What to do if 109 7 Accessories 111 8 Technical data 113 8 1 General data 113 8 2 Measurement characteristics 117 8 2 1 Oxygen measurement 117 8 2 2 Temperature measurement 118 9 Indexes 119 9 1 Display abbreviations 119 9 2 Glossary 121 9 3 Index 123 ...

Page 5: ...verview 67 ba24105e08 11 2010 1 Overview 1 1 General features Fig 1 1 Oxi 170 1 Watertight housing IP 66 2 Display 3 Operating keys 4 Sensor input socket 5 Cable glands Oxi 170 1 2 3 5 4 O mg l 1 1 85 C REL1 5 6 ...

Page 6: ...ded main measured value z As a control relay with timer function e g for time controlled sensor cleaning operated by compressed air 1 2 3 SensCheck relay sensor monitoring The SensCheck relay is designed as a closer galvanically separated from the instrument It becomes active if a sensor error such as a hole in the membrane cap occurs At the same time the SensCheck symbol appears on the display se...

Page 7: ...lave 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 commands e g sending measured values calibration data and relay states Note The RS 485 interface that accompanies the RT RS instrument versions is described in detail in a separate manual PROFIBUS co...

Page 8: ...Overview Oxi 170 70 ba24105e08 11 2010 ...

Page 9: ...e 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 be followed precisely in order to avoid slight injury to personnel or damage to the instrument or the environment Other labels Note This symbol indicates instructions that describe special features N...

Page 10: ...HNICAL DATA It left the factory in perfect condition Function and operational safety The flawless functioning of the Oxi 170 monitor is only guaranteed if attention is paid to the generally accepted safety measures and the special safety instructions in this operating manual during use The flawless functioning and operating safety of the Oxi 170 monitor is only guaranteed under the ambient conditi...

Page 11: ...6 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 4 boreholes in the rear panel of the housing The boreholes are accessible when the housing cover is open Fig 3 1 Mounting boreholes of the Oxi 170 The clearances of the boreholes are given in the di...

Page 12: ...1 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 option Current output REC1 3 RS 485 GND RS option Current output REC2 RT option 4 SensCheck relay Current output REC2 RT option 5 SensCheck relay a Sensor 6 Relay K1 RT option b Sensor 7 Relay K1 RT option c Sensor...

Page 13: ...ting 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 WARNING Free wires must not protrude into the housing of the Oxi 170 Danger of short circuit and fire Touch proof circuits can also come into contact with dangerous voltages if touched and lead to life t...

Page 14: ...ications 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 facility must be installed close to the monitor and easy to reach by the user and marked as an interrupt facility for the monitor z The monitor must only be opened after installation if the mains voltage h...

Page 15: ...f 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 Protect electrical circuits against currents that are too high with an electrical fuse z After the monitor has been installed it may only be opened if the mains voltage and all external voltages have ...

Page 16: ...nline D O sensors have a permanently mounted connection cable with a 7 pin plug adapter Connection Connect the plug adapter of the sensor connection cable with the sensor input jack of the monitor Fig 3 3 Connection of the D O sensor Oxi 170 O mg l 1 1 85 C REL1 5 6 TriOxmatic 690 TriOxmatic 70x CellOx 700 Oxi 170 ...

Page 17: ...S terminal box order no 108 606 for cable extension between the sensor electrode and the monitorand the K 160 cable plug order no 109 508 The maximum cable length between the electrode and monitor including the length of the sensor connection cable is 100 m Note The wiring is described in the mounting instructions of the KI S terminal box ...

Page 18: ...Installation Oxi 170 80 ba24105e08 11 2010 ...

Page 19: ...e of the following errors 1 Upper display line Measured oxygen value operator guidance 2 SensCheck symbol 3 Lower display line Measured temperature value operator guidance 4 Status displays depending on instrument status and operating situation Sal mg l Sal O 8 8 88 1 C Oxi Cal AR Ident Auto REL2 Baud REL1 S 8 8 8 1 2 3 4 Oxi 170 Electrolyte solution depleted Membrane defective or leaky ...

Page 20: ...n 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 upwards in the selection or navigate one menu level upwards UP Decrease the value scroll downwards in the selection or navigate one menu level downwards DOWN ...

Page 21: ...s 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 Password protection All settings of the parameterization and configuration level can be protected with a three digit numeric code against unauthorized or unintentional modification or 1 or or 2 OPERATING ...

Page 22: ...sword 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 entered in order to change settings Enter the password as follows Set the first flashing digit with UP DOWN and confirm with ENTER Set the other two digits in the same way 4 After the last digit you ...

Page 23: ...d 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 Settings that are not available will be skipped z After running through all the settings you again reach the starting point of the configuration level From here change to the operating level with M or ...

Page 24: ...quivalent entered in the parameter level when calculating the measured value see section 4 5 2 CIN z 690 z 700 z 701 Connected sensor type Crn z 6 0 mg l z 2 00 mg l z 600 z 20 0 selectable with the TriOxmatic 701 only Measuring range or measuring mode 690 TriOxmatic 690 700 TriOxmatic 700 SW TriOxmatic 700 IN 701 TriOxmatic 701 CellOx 700 Selection Measuring range Resolu tion 60 0 mg l 0 0 60 0 m...

Page 25: ... range 0 00 20 00 mg l step size 1 mg l Measuring range 0 0 200 0 step size 10 Note If the range is exceeded the recorders output a constant value of 20 5 mA OFL display The instrument automatically returns to the defined recorder range when the value is within the range again Setting Selection Values Explanation values in bold typeface values on delivery Upper final value 5 60 mg l Lower final va...

Page 26: ...unctions of the freely configurable relays REL 1 and REL 2 The configuration of these relays is described in detail in section 4 6 1 The REL 1 or REL2 status display shows 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 relays REL 1 and REL 2 O open no...

Page 27: ...ss 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 protection is set up the password must be entered in order to change settings Enter the password as follows Set the first flashing digit with UP DOWN and confirm with ENTER Set the other two digits...

Page 28: ...ther settings is reached 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 to the next setting or return to the main level z Certain settings or choices depend on the instrument variant or Display Description Instrument version Stan dard RT RT RS PSA Sali...

Page 29: ...erating level z In view mode you can change to the operating level from any point with M Setting table Setting Selection Values Explanation values in bold typeface values on delivery PSA Sal 0 7 0 Entry of the salinity equivalent for the salt content correction see section 4 4 2 The salt content correction compensates the influence of salt contents 0 1 on the oxygen measurement The salt content co...

Page 30: ...f erratic changes of the input signal PR2 only with RT and RT RS option z 4 20 z 0 20 or dI 1 dI 20 Current range and attenuation of the REC 2 current output in rEC operating mode analog output for the temperature value For setting possibilities see Pr1 ReC operating mode PL UL LL REL 1 2 HS tD only with RT and RT RS option depending on the configuration Settings for the REL 1 and REL 2 relays con...

Page 31: ... entering the altitude the default value for the air pressure entry is automatically adjusted and vice versa PIF only with RT RS option depending on master slave operating mode Interface parameters Baud rate address etc The parameterization 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 optio...

Page 32: ...o that the temperatures equalize Carry out the balancing Press ENTER Set the measured temperature value upper display line to the value of the reference thermometer with UP DOWN The lower display line shows the correction value PCS tr REL 1 2 tc th only with RT and RT RS option depending on the configuration Timer settings for relays that are configured as control relays for a sensor cleaning syst...

Page 33: ...Freeze The relay 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 mg l LL mg l UL C LL C The relay can be set as an upper or lower limit indicator for both the oxygen value and for the measured temperature value It becomes active if a specified limit is exceeded or undercut The relays can be config...

Page 34: ...ding 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 undercut a relay switches z Monitoring two limiting values using two relays If the upper limiting value is exceeded or undercut a relay switches and if the lower limiting value is exceeded or undercu...

Page 35: ...sis 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 switching delay for the limit value has expired the relay switches Time Measured value UL LL Hysteresis HS1 Hysteresis HS1 Relay 1 td2 td2 td1 td1 Hysteresis HS2 Hysteresis HS2 Relay 2 Relay 2 Time Relay st...

Page 36: ...NTER 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 note Set the first flashing digit with UP DOWN and confirm with ENTER Set the other digits in the same way td 00 00 59 59 Switching delay in Min Sec The time period for which the limit value includi...

Page 37: ...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 seconds Duration of the cleaning process During the cleaning process the measured value is frozen th 10 900 seconds Time for adapting the sensor to the measured medium after the cleaning process During the adaptation pe...

Page 38: ...plication Calibration procedures Ideally calibration takes place in water vapor saturated air To do this position the sensor approx 2 cm above a water surface e g in a narrow mouthed bucket or a similar vessel filled with water At air temperatures below 5 C we recommend not to calibrate in air but in air saturated water with a higher temperature Air saturated water is generated by vigorously and r...

Page 39: ...surement runs until a stable value is reached AR flashes 4 If the value is stable AR goes out The slope is accepted Note A flashing slope value indicates that the slope is close to the edge of the permissible range slope 0 5 or 1 4 In this case replace the electrolyte and membrane head in the near future 5 Put the sensor back into the measuring position 6 Press ENTER The measured value is displaye...

Page 40: ...a24105e08 11 2010 7 Press ENTER The display switches to the normal measured value display The states of all relays and current outputs linked with the measured oxygen value again follow the measured value mg l O 1 1 85 C 5 6 ...

Page 41: ...rameterization level Press ESC during the password prompt to view all settings in view mode see section 4 5 1 CALLING UP THE PARAMETERIZATION LEVEL z Calibration data z Software version Viewing calibration data and software version To call up the data of the last calibration press ENTER in the measured value display operating level The slope is displayed Swap to the display of the software version...

Page 42: ...same time Note You can leave the test mode at any time again with 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 of current output 1 4 Press ENTER A fixed current value can be set on current output 1 here Set 0 1 mA with M Set 20 0 mA with C The value can be increased or decreased as required adjustment range 0...

Page 43: ... 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 relay 1 on off with ESC Switch relay 2 on off with UP Switch the SensCheck symbol on off with DOWN 9 Proceed to the next test item with ENTER Test of the RS 485 communication RT RS option 10 Press ENTER AR REL1 REL2 C 2 ...

Page 44: ...sent 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 to the RS command RSID without RS 485 protocol e g for printer output with UP Terminate the test with ENTER 11 Return to the operating level with M AR REL1 REL2 r 8 5 4 S t t ...

Page 45: ... 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 aggressive cleaning agents such as alcohol organic solvents or chemical detergents These types of cleaning agent can attack the surface of the housing ...

Page 46: ...Maintenance and cleaning Oxi 170 108 ba24105e08 11 2010 ...

Page 47: ...calibration Recalibrate Cause Remedy The measured D O or temperature value is outside the measuring range Check the measurement conditions Cause Remedy Output range of the linked recorder output exceeded Adjust recorder range Cause Remedy Sensor Electrolyte solution depleted Replace membrane head and refill see sensor operating manual Cause Remedy Sensor Membrane defective Replace membrane head an...

Page 48: ...What to do if Oxi 170 110 ba24105e08 11 2010 ...

Page 49: ...essories 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 EK 170 108 206 Passive terminal box KI S 108 606 ...

Page 50: ...Accessories Oxi 170 112 ba24105e08 11 2010 ...

Page 51: ...105e08 11 2010 8 Technical data 8 1 General data Dimensions Fig 8 1 Dimension drawing of the Oxi 170 dimensions in mm Test certificates CE 222 105 202 Side view Front view Rear view approx 238 198 178 Oxi 170 O mg l 1 1 85 C REL1 5 6 ...

Page 52: ...ox 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 Overvoltage category II Power consumption Maximum approx 18 W Nominal voltage depending on variant z 230 V AC 15 10 z 115 V AC 15 10 z 24 V AC 15 10 z 24 V DC 30 20 AC frequency 48 62 Hz Connection 2 pin...

Page 53: ...lug 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 Relay contacts Galvanically separated Max switching voltage 250 V AC or 30 V DC Max switching current 5 A AC and DC Max switching power 150 W resistive load SensCheck relay Normally open switches with sensor damage Relays K1 and K2 RT and RT RS option...

Page 54: ...for measured D O 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 laboratory use Interference immunity according to EN 61326 A1 Table A 1 Resources for industrial areas intended for indispensable operation Interference emission limits for resources of class B System lightn...

Page 55: ...01 mg l O2 0 1 0 1 mg l O2 1 Accuracy 1 of measured value 1 digit Temperature compensation Via temperature probe in the sensor see section 8 2 2 Air pressure compensation Manually by entering the following variables optional Actual air pressure 500 mbar 1100 mbar Local altitude 698 5573 m above sea level Reference temperature 20 C Calibration Single point calibration in water vapor saturated air o...

Page 56: ...ts are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to caus...

Page 57: ...rting point of the configuration level CSA Salt content correction 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 with frozen output UL LL Limit monitor CS Cleaning system CrF Relay switching behavior PA Starting point of the parameterization level PSA Salt content Pr1 Curren...

Page 58: ...rameterization of current outputs Miscellaneous Pt Temperature balancing PCS Cleaning system UL Upper limit LL Lower limit HS Hysteresis td Switching delay Tr Cleaning interval tc Cleaning duration th Adjustment duration dI Attenuation So Software version tst Test mode ...

Page 59: ...red value The measured value is the special value of a measured parameter to be determined 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 sensor In addition there is the cable and possibly an amplifier terminal strip and armature Oxygen partial pressure Pressu...

Page 60: ...the relation of the slope value to the value of a theoretical reference sensor of the same construction type Test sample Designation of the test sample ready to be measured Normally a test sample is made by processing the original sample The test sample and original sample are identical if the test sample was not processed ...

Page 61: ...g range 86 N Nameplate 69 O Operating level 83 Operational safety 72 Outdoor mounting 73 P Parameterization level 83 Password Entry 84 89 Setting 93 PROFIBUS connection 69 R Relay Display on the measured value display 100 Function 88 Monitoring measured value frozen 95 Monitoring the mains voltage 95 Switching behavior 88 RS 485 69 S Safe operation 72 Salt content correction 86 91 SensCheck relay ...

Page 62: ...Index Oxi 170 124 ba24105e08 11 2010 ...

Page 63: ......

Page 64: ...Wissenschaftlich Technische Werkstätten GmbH Dr Karl Slevogt Straße 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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