TechnicalInformationTI 199C/24/ae
Dissolved Oxygen Measurement
liquisys M COM 223 / 253
Oxygen Controller
Liquisys M COM 253
Liquisys M COM 223
Due to the modularity of its design, theLiquisys S COM 223 / 253 controller canbe adapted to a wide range of customerneeds. The basic version, whichprovides simple measuring and alarmsignaling functions, can be equippedwith additional software and hardwaremodules to match specific applications.Retrofitting of expansion modules isalso possible.
Areas of application
• Waste water treatment plants
• Effluent treatment• Water treatment and water monitoring• Drinking water• Surface water:
rivers, lakes, ocean• Fish farming
Benefits at a glance
• Measuring controller in field orpanel-mounted housing
• Universal application– Switchable between oxygen
concentration in mg/l andsaturation index in % SAT viasoftware switching (mg/l = ppm)
• Simple handling– Logically arranged menu structure
with plain text in 6 languagesfacilitates instrument configuration
– Large, two-line display indicatesmeasured value and temperatureat the same time
– Simple one-point calibration in airor in the medium
• Safe Operation– Overvoltage (lightning) protection
according to EN 61000-4-5– Direct access for manual contact
control• CSA GP* and CE approved
* please consult factory
The basic unit can be extended with:• 2 or 4 contacts for use as:
− Limit contacts (also fortemperature)
− PID controller
− Timer for simple rinse processes
− Complete cleaning withChemoclean
• Plus package:
− Automatic pressure compensation
− Any current output configurationvia table
− Automatic initiation of cleaning incase of alarm or limit violation
− Live check of sensorProcess monitoring
• HART® or PROFIBUS PA and DP• 2nd current output for temperature
Details Liquisys M COM 223 / 253 provides asolution for all water and waste watertreatment applications.
Features of the basic version (DX):
Measurement of oxygen concentrationin mg/l or % saturationThis is selected via the menu. Thetemperature is displayed at the sametime or, if desired, not shown at all.
The COS 41 sensor has no zero currentand therefore only requires one-pointcalibration. This is performed in air(corresponding to 100% saturation) orby reference calibration in the medium.
Different alarms are required dependingon application and operator. Thereforethe Liquisys M COM 223 / 253 permitsindependent configuration of the alarmcontact and error current for eachindividual error. Unnecessary orundesirable alarms can be suppressedin this manner.
Up to four contacts can be used as limitcontacts (also for temperature), toimplement a PID controller or forcleaning functions.
Direct manual operation of thecontacts (bypassing the menu)provides quick access to limit, control orcleaning contacts, permitting speedycorrection of deviations.
The serial numbers of the instrumentand modules and the order code can becalled up on the display.
The DS version provides additionalfunctions:
The oxygen concentration not onlydepends on the local altitude, but alsoon the weather (air pressure). Theautomatic pressure compensationfunction takes these fluctuations intoaccount.
In order to display wide measuringranges while still achieving a highresolution in specific ranges, the currentoutput can be configured as required viaa table. This permits bilinear orquasi-logarithmic curves.
The live check issues an alarm whenthe sensor signal does not change overa defined period of time. This may becaused by blocking, passivation, orseparation from the process.
The Process Check System is used tomonitor adjustable time intervals, e.g.for permanent aeration or permanentabsence of aeration.
E 017E 123- - - -
onoffon
offonoff
2.4 / 22 mA
offon
Timer
toff
offon
onChemoclean
t
Instrument DATA
eS r Nr I1
1 56 3 4 83
pO2
t0
20
mA
2
0
20
mA
Basic Version and
Plus Package
Measuring and Control
System
A complete measuring systemcomprises:• the oxygen controller Liquisys MCOM 223 or COM 253
• an oxygen sensor COS 41 with anintegrated NTC temperature sensor
• an immersion, flow or retractableholder
Options:
• extension cable (type CMK), and• junction box VBM
Up to 4 relays
Alarm contact
Signal output 1:oxygen
Signal output 2:temperature (optional)
Aux. 15 V supply voltage
2 digital inputs
Power supply
Mounting examplewith Liquisys M COM 223 / 253
3
ENDRESS+HAUSERLIQUISYS
CAL REL
REL1
REL1
ALARMREL2
REL2E
ENDRESS+HAUSERLIQUISYS
CAL REL
REL1
REL1
ALARMREL2
REL2E
Liquisys M COM 253
Weather protection
Immersionholder
CYA 611
Oxygen sensorCOS 41
Retractable holderCOA 461
Liquisys M COM223
Basic Version With plus package (DS version)
Alarm signaling Alarm signaling
MEASUREMENT
CALIBRATION Automatic PRESSURE COMPENSATION
Read instrument DATA PROCESS CHECK SYSTEM for monitoring,e.g. of aeration
Linear CURRENT OUTPUT CURRENT OUTPUT simulation LIVE CHECK of sensor
1 programmable ALARM CONTACT CURRENT OUTPUT programmable (table) (contact and error current)
Additional features Additional features
Controlling Controlling
2 CHANGEOVER CONTACTS for
- Measuring parameter limit - Temperature limit Automatic cleaning triggered by alarm or limit - PID controller violation - Timer for cleaning
Additional features Additional features
Cleaning Cleaning
2 more CHANGEOVER CONTACTS (total of 4) for
- Measuring parameter limit - Temperature limit Cleaning triggered externally or automatically - PID controller by alarm or limit violation - Chemoclean cleaning (water and cleaning agent)
Operation
Liquid crystal displayfor display ofmeasured values,configuration dataand current menu field
4 main control keys forcalibration andinstrument configuration
Key for switchingbetween automatic andmanual relay operation
LED indicatorsfor switched limitoutputs
Field for userlabeling
Key for manualrelay switching
LED indicator foralarm function
User interface:Display and keys
Everything at a glance
The display simultaneously shows thecurrent measured value and thetemperature – the essential processdata. Brief informational texts in theconfiguration menu provide assistancewith parameter configuration.
Intelligent and simple
All instrument control functions arearranged in a logical menu structure.Following access code entry, theindividual parameters can be easilyselected and modified as needed.
Overview of Liquisys MCOM 223 / 253 menu.This covers allthe options that can beinstalled (see page 2Details).
4
SETUP 1
SETUP 2
ALARM
CHECK
RELAYS
SERVICE
CURRENT OUTPUT
Selection of measurement type and unit, adjustment of measured value filter,altitude adjustment
Adjustment of current output assignment, curve and simulation for verification
User adjustment of errors to switch relay or generate error current(S version: automatic cleaning trigger in the event of an alarm)
Process Check System and live check alarm adjustment
Up to 4 relays may be configured as limit contacts, PID controller, timeror for chemical cleaning (S version: automatic cleaning trigger in caseof limit violation)
Selection of language version, display of software or hardware serialnumbers, entry of access codes
Temperature measurement, salinity correction
CALIBRATION Calibration in air or in the medium
Current temperature display can be suppressed by pressing the PLUS key
Display of active errors (sequence according to priority)
MEAS. VALUE
TEMPERATURE
Display
L+
L–
L
N
=
41
42
43
47
57
51
54
48
58
52
55
49
59
53
56
15 V85
86
10 to 50 V
93
94
mA
10 to 50 V
81
34
33
82
mA
32
31
91
11bn
12
gn
rd
90
O2
S
K
AA
K
NTC
O2
Electrical Connection
Left:Liquisys M COM 223,connections on the rearof the instrument
Right:Liquisys M COM 253,rear of instrument withreplaceable electronicsbox (E)
Electrical connection ofLiquisys M COM 223 / 253
All connections to the panel-mountedinstrument COM 223 are established viathe terminal strips on the rear.In the case of the field instrument COM253, all wires (including the sensorcable) are connected to terminals in aseparate wiring compartment.
All the wiring can remain in place if theinstrument needs repair because allrepairs are limited to assemblyreplacement. Dismantling the instrumentand rewiring is not necessary.
Sensor COS 41
Signal output 1:oxygen
Signal output 2:temperature(optional)
Digital input 1
Digital input 2
Aux. voltageoutput
Alarm*
Relay 1*
Relay 2*
Relay 3*
Relay 4*
optional
*Contactstatus shown:no current orfault present
Power supply
E
5
ENDRESS+HAUSER
LIQUISYS
CAL REL
REL1
REL1
ALARM
REL2
REL2E
ENDRESS+HAUSERLIQUISYS
CAL REL
REL1
REL1
ALARMREL2
REL2E
Dimensions
3.54”(90)
5.47”(139)
0.24”(6)
3.78”(96)
Dimensions ofLiquisys M COM 253
Dimensions ofLiquisys M COM 223
6
9.72”(247)
Ø 0.24”(6)
4.53”(115)
6.18”(157)
0.43”(11)
2.75”(70)
2.75”(70)
6.06”(154)6.69”(170)
Mounting of
Liquisys M COM 223
The panel-mounted version is mountedusing the supplied tensioning screws.The required overall mounting depth isapproximately 6.89 in. (175 mm).
3.62”+0.02”
(92+0.5)
3.62”+0.02”
(92+0.5)
3.78”(96)
max. 1.77”(45)
0.24”(6)
5.47”(139)
approx.0.98”(25)
1.30”(33)
2.24”(57)
3.54”(90)
Flat gasket(included in delivery)
Mounting cutoutaccording toDIN 43700
Installation of panel-mounted housing
7
6.18”(157)
Ø 0.31”(8)
0.63”(16)
4.53”(115)
Mounting of
Liquisys M COM 253
8
Wall mountingScrews: Ø 0.24” (6 mm)Anchors: Ø 0.31” (8 mm)
Mounting on cylindricalpipes (shown withweather protection coverinstalled on right)
Post mounting kit forinstallation of field housingon cylindrical pipes(horizontal or vertical,max. Ø 2.36” (60 mm);see Accessories)
3.54”(90)
1.18”(30)
Ø 0.31”(8)
2.36”(60)
0.24”(M 6)
3.54”(90)
2.76”(70)
Ø 0.31”(8)
Ø 0.24”(6)2.76”
(70)3.54”(90)
2.76”(70)
9
Technical DataGeneral specifications
Input
Output
Manufacturer Endress+Hauser
Product designation Liquisys M COM 223Liquisys M COM 253
Measured quantities O2 / temperature
O2 measurement with sensor COS 41
Display and measuring range 0 to 20 mg/l or 0 to 200% SAT (1 mg/l = 1 ppm)
Temperature compensation range 0 to 122 °F (0 to 50 °C)
Pressure compensation range (optional) 0 to 1200 hPa
Altitude adjustment range 0 to 13,300 ft. (0 to 4000 m)
Salinity adjustment range 0 to 4%
O2 signal input
Signal current 0 to 3000 nA
Slope adaptation 75 to 140% of nominal slope
Nominal slope (sensor in air, 20 °C, 1013 mbar) 290 nA
Maximum length of cable to sensor 160 ft. (50 m)
Temperature measurement
Temperature sensor NTC, 30 kΩ at 77 °F (25 °C)
Measuring range 14 to 140 °F (- 10 to + 60 °C)
Temperature offset range ± 68 °F (± 20 °C)
Digital inputs 1 and 2
Voltage 10 to 50 V
Current consumption max. 10 mA
O2 signal output
Current range 0 / 4 to 20 mA, galvanically separated;error current 2.4 / 22 mA
Load max. 500 Ω Output range ∆ 2 to ∆ 20 mg/l or ∆ 20 to ∆ 200% SAT
Isolation voltage max 350 Vrms
/ 500 V DC
Overvoltage (lightning) protection acc. to EN 61000-4-5: 1995
Temperature signal output (optional)
Current range 0 / 4 to 20 mA, galvanically separated
Load max. 500 Ω Output range adjustable, ∆ 10 to ∆ 100% of upper range value
Isolation voltage max 350 Vrms
/ 500 V DC
Overvoltage (lightning) protection acc. to EN 61000-4-5: 1995
Auxiliary voltage output
Output voltage 15 V ± 0.6 VDC
Output current max. 30 mA
Contact outputs (floating changeover contacts)
Switching current with ohmic load (cos ϕ = 1) max. 2 A
Switching current with inductive load (cos ϕ = 0.4) max. 2 A
Switching voltage max. 250 V AC, 30 V DC
Switching power with ohmic load (cos ϕ = 1) max. 1250 VA AC, 150 W DC
Switching power with inductive load (cos ϕ = 0.4) max. 500 VA AC, 90 W DC
Limit contactor
Limit adjustment range 0 to 20 mg/l or 0 to 200% SAT
Pickup / dropout delay 0 to 7200 seconds
Technical Data
(continued)
Output (continued)
Accuracy
Ambient conditions
Physical data / design
Power requirements
10
¹acc. to IEC 746-1, for nominal operating conditionsSubject to modifications.
Controller
Function (adjustable) Pulse length / pulse frequency controller
Controller response PID
Proportional band Kp: 0.10 to 10.00
Period for pulse length controller 0.5 to 999.9 seconds
Frequency for pulse frequency controller 60 to 180 min-1
Alarm
Function (switchable) steady / fleeting contact; normally closed / open
Alarm threshold adjustment range O2 / temperature: complete measuring range
Alarm delay 2 to 2000 seconds
Monitoring time for lower limit violation 0 to 2000 min
Monitoring time for upper limit violation 0 to 2000 min
O2 measurement with sensor COS 41
Resolution 0.01 mg/l or 0.1% SAT
Deviation of indication1 max. 0.5% of measuring range
Reproducibility max. 0.2% of measuring range
Measurement deviation1, O2 signal output max. 0.75% of measuring range
Temperature measurement
Resolution 0.2 °F or 0.1 °C
Deviation of indication1 max. 1.0% of measuring range
Measurement deviation1, temperature signal output max. 1.25% of current output range
Nominal operating temperature 14 to 131 °F (-10 to +55 °C)
Ambient temperature (limit operating conditions) -4 to 140 °F (-20 to +60 °C)
Storage and transport temperature -13 to 149 °F (-25 to +65 °C)
Relative humidity (nominal operating conditions) 10 to 95%, non-condensing
Protection class of panel-mounted unit NEMA 3S (IP 54 (front), IP 30 (housing))
Protection class of field housing NEMA 4X (IP 65)
Electromagnetic compatibility interference emission acc. to EN 50081-1: 1992interference immunity acc. to EN 50082-2: 1995
Dimensions of panel-mounted unit (H x W x D) 3.78 x 3.78 x 5.71 in. (96 x 96 x 145 mm)
Installation depth approx. 6.89 in. (175 mm)
Dimensions of field housing (H x W x D) 9.72 x 6.69 x 4.53 in. (247 x 170 x 115 mm)
Weight of panel-mounted unit max. 1.54 lb. (0.7 kg)
Weight with field housing max 5.07 lb. (2.3 kg)
Display LC display, two lines, five and nine digits, withstatus indicators
Materials
Housing of panel-mounted unit polycarbonate
Front membrane polyester, UV-resistant
Field housing ABS PC Fr
Supply voltage 100 / 115 / 230 V AC +10 / -15%, 48 to 62 Hz24 V AC/DC +20 / -15%
Power consumption max. 7.5 VA
Fuse protection fine-wire fuse, medium time-lag, 250 V / 1 A
Accessories
11
Mounting accessories
Type Features Order numberPendulum For pendulum suspension of assemblies 50080196frame e.g. CYA 611
Material: 304 SSPost mounting Kit for mounting of field housing on 50086842kit horizontal or vertical pipes, max.
diameter, 2.5” (60 mm)Material: 304 SS
Holders
Type Features ApplicationsCYA 611 Immersion assembly with G 1, G 3/4 Sewage, water
or 3/4” NPT threadCOA 250 Flow holder with screwed G 3/4 measuring Installation for flow
connection operating, e.g. inwaterworks oranalytical cabinets
Probfit Retractable holder with DN 50 or 2” ANSI Installation for in-lineCOA 461 flange operation, e.g. in
pipelines or on tankwalls
COA 110-50 Floating immersion holder Waste water, water,in basins withchanging levels
Oxygen sensor
Type Features ApplicationsCOS 41 Amperometric two-electrode sensor in Waste water, drinking
all plastic housing with permanently water, surface water,attached cable, cable length 22 ft. (7 m) fish farmingor 50 ft. (15 m), protection class NEMA 6P(IP 68), with integrated temperature sensor
Cables
Type Features Order numberVBM Junction box for extension of cable 51500177
connection between measuring cableand instrument, protection type NEMA 4X(IP 65)
CMK Special measuring cable for extension of 50005374line between transmitter and junction boxVBM
Product structure
Oxygen transmitter Liquisys M COM 223 / COM 253
COM 233 -
1 VersionDX Oxygen measurementDS Oxygen measurement, automatic pressure compensation,
additional functions2 Power Supply
0 230 VAC1 115 VAC2 230 VAC, CSA general purpose3 115 VAC, CSA general purpose5 100 VAC7 24 VAC / VDC, CSA general purpose8 24 VAC / VDC
3 Measurement output0 Oxygen1 Oxygen and temperature3 Profibus PA4 Profibus DP5 Oxygen with HART6 Oxygen with HART and temperature
4 Contacts05 No additional contacts10 2 contacts (limit / PID / timer)15 4 contacts (limit / PID / Chemoclean)16 4 contacts (limit / PID / timer)
United States
Endress+Hauser, Inc.2350 Endress PlaceGreenwood, IN 46143Phone: (317) 535-7138888-ENDRESSFAX: (317) 535-8498
TI 199C/24/ae/05.02© 2002 Endress+Hauser, Inc.
Canada
Endress+HauserCanada Ltd.1440 Graham’s LaneUnit 1, BurlingtonON, L7S 1W3Phone: (905) 681-9292800-668-3199FAX: (905) 681-9444
Mexico
Endress+HauserPaseo del Pedregal No. 610Col. Jardines del Pedregal01900, Mexico D.F.MexicoPhone: (525) 568-2405FAX: (525) 568-7459
For application and selection assistance,in the U.S. call 888-ENDRESS
For total support of your installed base, 24 hoursa day, in the U.S. call 800-642-8737
Visit us on our web site, www.us.endress.com
Endress+HauserThe Power of Know How
1 2 3 4
COM 253 -
1 VersionDX Oxygen measurementDS Oxygen measurement, automatic pressure compensation,
additional functions2 Power Supply
0 230 VAC1 115 VAC2 230 VAC, CSA general purpose3 115 VAC, CSA general purpose5 100 VAC7 24 VAC / VDC, CSA general purpose8 24 VAC / VDC
3 Measurement output0 Oxygen1 Oxygen and temperature3 Profibus PA4 Profibus DP5 Oxygen with HART6 Oxygen with HART and temperature
4 Contacts05 No additional contacts10 2 contacts (limit / PID / timer)15 4 contacts (limit / PID / Chemoclean)16 4 contacts (limit / PID / timer)
1 2 3 4