Endress+Hauser Liquisys M COM 223 F User manual

BA 246C/07/en/07.02
No.51505938
Software version 2.40 or higher Liquisys M
COM 223 F / 253 F
Transmitter for
Dissolved Oxygen
ENDRESS+HAUSER
LIQUISYS M
ENDRESS+HAUSER
LIQUISYS M
Hauser+Endress
The Power of Know How
Operating Instructions

You want to find out about the device.
Just look here:
Safety
General information
You wish to install the device.
The required steps are described in this chapter:
Installation
You wish to operate or reconfigure the device.
The operating concept is explained in these chapters:
Operation
Device configuration
Interfaces
If faults occur or maintenance is required, look here
for help:
Maintenance and troubleshooting
Diagnostics and corrective maintenance
Accessories
Appendix
Technical data
Index
%
Ω
°C

OM253FE0.CHP
Table of contents
1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Symbols used ............................................................. 2
1.2 Storage and transport ....................................................... 2
1.3 Unpacking ................................................................ 2
1.4 Dismantling, packing, and disposal ............................................ 2
1.5 Product overview ........................................................... 3
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Intended application ........................................................ 4
2.2 General safety instructions ................................................... 4
2.3 Installation, start-up, operation ................................................ 4
2.4 Monitoring and safety features ................................................ 5
2.5 Immunity to interference ..................................................... 5
2.6 Declaration of conformity ..................................................... 5
3 Installation........................................................... 6
3.1 Measuring system .......................................................... 6
3.2 Dimensions ............................................................... 7
3.3 Mounting ................................................................. 8
3.4 Electrical connection ....................................................... 12
3.5 Sensor installation and measuring cable connection .............................. 14
4 Operation........................................................... 15
4.1 Operator interface ......................................................... 15
4.2 Display .................................................................. 15
4.3 Key functions ............................................................. 16
4.4 Auto / manual mode of operation.............................................. 17
4.5 Operating concept......................................................... 18
5 Instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Start-up ................................................................. 23
5.2 System configuration ....................................................... 23
5.3 Current input ............................................................. 25
5.4 Current outputs ........................................................... 28
5.5 Monitoring functions........................................................ 31
5.6 Relay contact configuration .................................................. 34
5.7 Service .................................................................. 44
5.8 E+H Service .............................................................. 46
5.9 Interfaces ................................................................ 47
5.10 Calibration ............................................................... 47
6 Interfaces........................................................... 50
7 Maintenance and troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1 Troubleshooting and elimination of current problems .............................. 52
7.2 Troubleshooting using the error messages ...................................... 55
8 Diagnostics and corrective maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1 Diagnosis ................................................................ 57
8.2 Corrective maintenance of Liquisys M COM 223 F ................................ 59
8.3 Corrective maintenance of Liquisys M COM 253 F ................................ 62
8.4 Spare parts orders ......................................................... 65
8.5 Service aids »Optoscope« with »Scopeware« ................................... 65
8.6 Corrective maintenance of measuring system ................................... 66
9 Accessories ......................................................... 68
10 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11 Appendix........................................................... 72
12 Index............................................................... 76
Liquisys M COM 223 F / 253 F Table of contents
Endress+Hauser 1

1 General information
1.1 Symbols used
Warning:
This symbol alerts to hazards which
could cause serious injuries as well
as damage to the equipment if
ignored.
Caution:
This symbol alerts to possible faults
which could arise from improper
operation. They could cause
damage to the equipment if ignored.
Note:
This symbol indicates important
items of information.
Double insulation
Equipment protected by double
insulation.
Alarm relay
Input
Output
1.2 Storage and transport
The packaging material used to store or
transport the transmitter must provide shock
protection. Optimal protection is provided by
the original packaging materials.
Conformance with permissible ambient
conditions (see Technical data) must be
assured.
1.3 Unpacking
Make sure that the packaging and the
contents are undamaged! Inform the post
office freight carrier or forwarding agent of
any damage. Damaged merchandise must be
retained until the matter has been settled.
Check that the scope of supply is complete
and agrees with the shipping documents and
your order (refer to nameplate for type and
version).
Keep the original packaging materials for
future storage or shipping of the transmitter.
If you have any queries, please contact your
suppliers or your Endress+Hauser sales
office (see rear of these Operating
Instructions). You can also contact us via the
Internet: www.endress.com
The delivery includes:
•Transmitter COM 223 F or
COM 253 F
•Operating Manual BA 246C/07/en
•Panel-mounted instrument:
–1 set of plug-in screw terminals
–2 clamping screws
•Field instrument:
–1 plug-in screw terminal
–1×cable gland Pg 7
–1×cable gland Pg 16, reduced
–2×cable glands Pg 13.5
–1 x NPT adapter set
(optional for CSA versions)
1.4 Dismantling, packing, and disposal
For reuse at a later time, the transmitter must
be carefully packed. Optimal protection is
provided by the original packaging materials.
When disposing of the equipment, observe
local regulations.
General information Liquisys M COM 223 F / 253 F
2Endress+Hauser

1.5 Product overview
You can recognise the device version from the order code or the nameplate. Sub “codes”are
the release codes for Software upgrade shown for ChemoClean (left of diagonal line) or Plus
packet (right of diagonal line).
Additional functions of Plus packet (HS version)
•Automatic correction of air pressure with
concentration measurement, function A2
•Current output table, functions O23x
•Monitoring for sensor and process,
function group P
131085-4D
ENDRESS+HAUSER
LIQUISYS M
order code
serial no. /
codes
diss. oxygen
COM 223-WS0116
276945
0…2000 mS/cm
-10 …60°C
0/4 …20 mA
230 VAC 50/60 Hz 7.5 VA
-10 …+55°CIP 54 / IP 30
0/4 …20 mA
-8732
prot. class ambient temp.
output 1 output 2
mains
meas. range
temperature
Made in Germany
D-70839 Gerlingen
3472
TYPO2223
Fig. 1.1 Nameplate COM 223 F
(left)
131085-4D
ENDRESS+HAUSER
LIQUISYS M
order code
serial no. /
codes
diss. oxygen
COM 253-WS0116
276944
0…2000 mS/cm
-10 …60°C
0/4 …20 mA
230 VAC 50/60 Hz 7.5 VA
-10 …+55°CIP 65
0/4 …20 mA
-8732
prot. class ambient temp.
output 1 output 2
mains
meas. range
temperature
Made in Germany
D-70839 Gerlingen
3472
TYPO2253.CDR
Fig. 1.2 Nameplate COM 253 F
(right)
Liquisys M COM 223 F / 253 F
Version
HX Oxygen measurement using COS 21 (basic functions)
HS Oxygen measurement using COS 21 with additional functions
Power supply
0 Power supply 230 V AC
1 Power supply 115 V AC
2 Power supply 230 V AC, CSA Gen. Purp.
3 Power supply 115 V AC, CSA Gen. Purp.
5 Power supply 100 V AC
7 Power supply 24 V AC/DC, CSA Gen. Purp.
8 Power supply 24 V AC/DC
Measurement output
0 1 Measurement output: dissolved oxygen
1 2 Measurement outputs: diss. oxygen and temp. / oxygen / set value
3 1 Measurement output: PROFIBUS-PA
4 1 Measurement output: PROFIBUS-DP
5 1 Measurement output: oxygen with HART®
6 2 Measurement outputs: oxygen with HART®and temperature
Contacts
05 No additional contacts
10 2 contacts (limit values / PID / timer)
15 4 contacts (limit values / PID / timer / ChemoClean)
16 4 contacts (limit values / PID / timer)
20 2 contacts with current input (limits / PID / timer)
25 4 contacts with cleaning, current input
(limit / PID / ChemoClean)
26 4 contacts with timer, current input
(limits / PID / timer)
COM253-F complete order code
COM223-F
OM253E01.CHP
Liquisys M COM 223 F / 253 F General information
Endress+Hauser 3

2 Safety instructions
2.1 Intended application
The Liquisys M COM 223 F / 253 F is a
reliable, field-tested transmitter for measuring
the oxygen content of fluidmedia.
The Liquisys M COM 223 F / 253 F is
particularly suitable for use in the following
areas of application:
•Process control in enzyme production
•Control of culture preparations
•Biotechnological production
2.2 General safety instructions
This device has been manufactured for safe
operation according to the state of the art in
engineering and conforms to the applicable
regulations and European standards (see
Technical data). It has been designed
according to EN 61010-1 and has left the
manufacturer’s works in perfect condition.
However, if used improperly or for purposes
other than the intended purpose, it may be
dangerous, e.g. due to incorrect connection.
Warning:
•Operating this instrument in any
way other than as described in
these instructions may
compromise the safety and
function of the measuring system
and is therefore impermissible.
•The notes and warnings in these
installation and operating
instructions must be strictly
adhered to!
2.3 Installation, start-up, operation
Warning:
•This device may only be installed,
connected electrically,
commissioned, operated and
serviced by properly trained
personnel authorized by the
system operator.
•The personnel must be familiar
with these operating instructions
and must adhere to the
instructions described therein.
•Make sure that the power supply
ratings match the data specified on
the nameplate before you connect
the instrument to a power source.
•A clearly identified mains
disconnecting device must be
installed close to the instrument.
•Live components can be touched
through the vent slots in the
housing and the openings on the
rear of the housing. Do not insert
any tools, wires or similar into
these slits (only COM 223 F).
•Check that all connections have
been properly made before
powering up the system!
•Damaged equipment that may be
dangerous must not be operated
and should be clearly identified as
being defective.
•Any troubleshooting of the
measuring point is to be
performed exclusively by
authorized, trained personnel.
•If faults cannot be remedied, the
instrument must be removed from
service and secured to prevent
accidental start-up.
•Repairs may only be performed at
the manufacturer’s works or
by the Endress+Hauser Service
Organisation.
Safety instructions Liquisys M COM 223 F / 253 F
4Endress+Hauser

2.4 Monitoring and safety features
Safety features
The transmitter is protected against external
influences and damage by the following
design measures:
•Stable housing
•Degree of protection provided by
enclosure: IP 65 (COM 253 F)
•UV resistance
Monitoring features
In the event of a system error or power failure,
an alarm condition is signalled via a fault-
signalling contact.
2.5 Immunity to interference
This instrument has been tested according to
the applicable European standards for
industrial applications with regard to
electromagnetic compatibility. The transmitter
is protected against external influences and
damage by design measures.
Warning:
The specified immunity to
interference only applies for
devices connected as outlined
in these operating instructions.
2.6 Declaration of conformity
The transmitter COM 223/253 F complies with
the legal demands of the harmonized
European standards.
E+H certfies the compliance with the
standards by using the 4sign.
OM253 FE02.CHP
Liquisys M COM 223 F / 253 F Safety instructions
Endress+Hauser 5

3 Installation
For a complete installation of the measuring point, proceed as follows:
•Installation or fixing of the transmitter(see Chap. 3.3)
•Selection and connection of cable and sensor (see Chap. 3.4, 3.5 and 9)
•Installation is followed by commissioning (see Chap. 5).
3.1 Measuring system
The complete measuring system comprises:
•Transmitter Liquisys M COM 223 F or
COM 253 F
•Oxygen sensor OxyMax H COS 21 with
integrated NTC temperature sensor
•Measuring cable COK 21
•an immersible, installation, flow or
retractable assembly, e.g. UniFit H
CPA 442 or CleanFit H CPA 475
Optionally:
•Extension cable (type CYK 71)
•Junction box VBM.
1
2
3
4
5
ENDRESS+HAUSER
LIQUISYS M
ENDRESS+HAUSER
LIQUISYS M
C07-COS2.CDR
Fig. 3.1
Complete measuring
system with transmitter
Liquisys M COM 2X3 F
1 Oxygen sensor
OxyMax H COS 21
2 Retractable assembly
CleanFit H CPA 475
3 Measuring cable COK 21
4 Field instrument
Liquisys M COM 253 F
5 Panel-mounted
instrument
Liquisys M COM 223 F
Installation Liquisys M COM 223 F / 253 F
6Endress+Hauser

3.2 Dimensions
Note:
There is a hole in the punching for
Pg 16 cable entry. It serves as a
pressure balance during air freight
dispatching. Make sure that there is
no moisture penetrating into the
housing before cable installation.
After cable installation, the housing
is completely tight.
ENDRESS+HAUSER
LIQUISYS M
CAL REL
REL1
REL1
ALARM
REL2
REL2
E
FELD1.CDR
11
170
247
115
∅6
157
154
70
70
Fig. 3.3
Dimensions of Liquisys
M COM 253 F
FELD2.CDR
1
2
3
4
Fig. 3.2
Interior view of housing of
Liquisys M COM 253 F
1 Removable
electronics box
2 Partition plate
3 Terminal blocks
4 Fuse
GEHAEUS1.CDR
OM253FE3.CHP
Liquisys M COM 223 F / 253 F Installation
Endress+Hauser 7

3.3 Mounting
3.3.1 Field instrument
Several mounting options are available for the
Liquisys M in the field instrument version:
•Post mounting on cylindrical pipes
•Post mounting on a square post
•Wall mounting with fastening screws
With direct weathering, use the weather
protection cover CYY 101.
Weather protection cover CYY 101
Weather protection cover for operation in the
open, for installation on the field instrument;
Material: Stainless steel 1.4301 (AISI 304);
Order No.: CYY 101-A
EINBAU2.CDR
96
6
139
90
Fig. 3.4
Liquisys M COM 223 F,
Mounting version
DACH.CDR
300
270
320
Fig. 3.5
Weather protection cover
CYY 101 for field
instrument
EINBAU1.CDR
Installation Liquisys M COM 223 F / 253 F
8Endress+Hauser

Post mounting kit
Installation kit for installing the field housing
on horizontal and vertical posts
(max. ∅60 mm);
Material: Stainless steel 1.4301 (AISI 304);
Order No. 50086842
Universal mounting post CYY 102
Square pipe for installation of transmitters;
Material: Stainless steel 1.4301 (AISI 304);
Order No. CYY 102-A
MONT5.CDR
60
90
70
∅6
70
∅8
70
90
M6
∅8
30
90
60 x 60
1495
150
120
Fig. 3.6
left:
Mounting kit
for post mounting on
cylindrical pipes
right:
square mounting post
CYY 102
OM253FE3.CHP
Liquisys M COM 223 F / 253 F Installation
Endress+Hauser 9

3.3.2 Mounting examples
MONT10.CDR
Fig. 3.7
Liquisys M,
field instrument:
Pipe mounting
MONT2.CDR
Fig. 3.8
Liquisys M,
field instrument:
left:
Wall mounting
right:
Mounting with universal
post and weather
protection cover
Installation Liquisys M COM 223 F / 253 F
10 Endress+Hauser

3.3.3 Panel-mounted instrument
The instrument is attached using the supplied clamping screws (see Fig. 3.9).
The total installation depth required is approx. 165 mm.
MONT9.CDR
92+0.5
92+0,5
90
57
33
approx. max. 45
96
92
1
2
3
139 6
3
3
3
Fig. 3.9
Fixing of mounting
instrument
1 Front of
control panel
2 Seal
3 Clamping screws
OM253FE3.CHP
Liquisys M COM 223 F / 253 F Installation
Endress+Hauser 11

3.4 Electrical connection
Wiring diagram
The wiring diagram depicted in Fig. 3.10 shows the instrument connections for an oxygen
sensor. The terminal assignment of the sensor COS 21 and the cable COK 21 is shown in more
detail in Figs. 3.13, and 3.14.
Note:
•The instrument has protection
class II and is generally operated
without protective earth
connection.
•Mains supply voltage fluctuations
should not exceed ten percent of
the nominal supply voltage.
•24V AC/DC models must be
supplied from an energy limiting
SELV source in accordance with
dir. IEC 1010.1 Annex H.
47
48
49
57
58
59
41
42
43
15 V
85
86
10-50 V
81
93
82
94
10-50 V
mA
31
32
mA
33
34
51
52
53
54
55
56
90
12
11
91
S
O2
O2
K
A
A
K
NTC
BN
YE
PK
BU
GN/YE
23 +
24 -
mA
L+
L–N
L1
∼=
ANO201.CDR
Auxiliary voltage
output
Digital
input 2
(Chemoclean)
Digital
input 1
(Hold)
Signal output 2
temperature
Signal output 1
oxygen
Sensor
COS 21
Alarm
(current-free
contact base)
Mains
Relay 1
(current-free
contact base)
Relay 2
(current-free
contact base)
Relay 3
(current-free
contact base)
for Chemoclean:
Water
Relay 4
(current-free
contact base)
for Chemoclean:
Cleaner
Current input
4 ... 20 mA
Fig. 3.10
Electrical connection of
Liquisys M COM 223 F /
253 F with full wiring
Installation Liquisys M COM 223 F / 253 F
12 Endress+Hauser

Note:
Please label the sensor terminal
block with the enclosed sticker.
Caution!
•Terminal designated as NC
may not be switched.
•Undesignated terminals
may not be switched.
Connections of field instrument
For connection, the measuring cables are introduced through the cable glands on the field
instrument and connected according to the diagrams in Figs. 3.10 and 3.11.
Connections of panel-mounted instrument
42
++ ++++-
-
----
434154 55 56
NC
NC
NC NC
31
K1190
1291
32
A
3433
S
NC 938685 94 81 82 23 24 NC
51 52 53 57 58 59 47 48 49
O2
Temp.
(opt.)
+15V
10mA
YEBN
BUPK GN/YE
REL 4SENSOR REL 3 REL 2 REL 1
135618-4A
COM 253 F
Digital 2 Digital 1
4..20mA
NC
Mains
Hilfsenergie
L1
+N -(AC)
(DC)
Contacts:
max. 2A
AC: 250V/500VA
DC: 30V/60W
135618_A.CDR Fig. 3.11
Connection compartment
sticker for field instrument
COM 253 F
31 +
32 -
33 +
12
34 -
85 +
NC
NC
NC
NC
NC
Sensor
NC
86 -
93 + S
94 - 42
81 + 43
82 - 41
O2
Temp.
(opt.)
+15V
10mA
Digital 2
Digital 1
11
91
90 K
A
YE
BU
BN
PK
GN/YE
135619-4A
Mains Contacts: max. 2A, AC:250V/500VA, DC:30V/60W
L1 +
AC DC
N-
REL1
REL2
REL3
REL4
4..20mA 24
23
49
COM
COM
COM
COM
-
+
59
54
55
56
52
51
53
58
57
48
47
131084-4C
135619_A.CDR Fig. 3.12
Connection sticker for
panel-mounted instrument
COM 223 F
OM253FE3.CHP
Liquisys M COM 223 F / 253 F Installation
Endress+Hauser 13

3.5 Sensor installation and measuring cable connection
Measuring cable connection
The terminal block is located in a separate
connection compartment which is accessible
by opening the plastic cover. Remove the
pre-pressed knock-outs for cable entry.
The oxygen sensors are connected using a
special, shielded multi-core cable.
Termination instructions are supplied with the
measuring cables. Use junction box VBM to
extend the measuring cable.
Note:
•Protect connectors, cable ends
and terminals against moisture to
prevent inaccurate measurement!
•For further information on cables
and junction boxes refer to chap.
9 Accessories.
Structure and termination of the sensor cable
Connection example
GN/YE
YE
PK
BN
BU
Pin
S
12
90
91
11
Assignment
Outer conductor
Active inner conductor
(NTC temperature sensor)
Cathode
Anode
NTC temperature sensor
COS21E.EPS
Fig. 3.13
Structure of the
measuring cable COK 21
O2
GN/YE BU YE PK BN
NTC
KA
S11129091
SENSAN.CDR
Cable COK 21
Fig. 3.14
Connection of the
sensor COS 21
Installation Liquisys M COM 223 F / 253 F
14 Endress+Hauser

4 Operation
4.1 Operator interface
4.2 Display
LED indicators
Liquid crystal display
185 mg/l
R232
Setpoint
DISPLAY1.CDR
LCD to display
measured values
and configurations
data
4 main operating keys
for calibration and
instrument configuration Shift key for
Automatic / Manual
operation
Display LEDs for
limit contactor
relay
(switching state)
Display LED for
alarm function
Display of active
contact and key for
relay switchover
in manual mode
Field for inscription by
user
Fig. 4.1
Operating elements
Liquisys M
Display of current operating mode »Auto«(green LED) or »Manual«(yellow LED)
Display of controlled relay in »Manual«mode (red LED)
Display of working state of relays 1 and 2
LED green: Measured value within allowed limits, relay inactive
LED red: Measured value outside allowed limits, relay active
Alarm display e.g. when limit values constantly exceeded,
Temperature sensor failure or system error
185 mg/l
R232
Setpoint
DISPLAY3.CDR
Display for
measuring mode
(normal operation)
Display for
calibration mode Display for
setup mode
(configuration)
Error
indicator In measuring mode:
Secondary measured value.
In setup / calibr. mode
e.g. setting value
In measuring mode:
Main measured value.
In setup / calibr. mode
e.g. parameter
Function coding display
Display of working
state Rel 3/4:
inactive active
Hold mode display
(current outputs reflect
last status)
For instruments with
communication:
Display to receive
messages.
Constantly visible in
Burst mode (with HART)
Sensor symbol
Temperature
offset
Manual
temperature
compensation Fig. 4.2 Liquid crystal display
OM253FE4.CHP
Liquisys M COM 223 F / 253 F Operation
Endress+Hauser 15

4.3 Key functions
CAL key
When the CAL key is pressed, the instrument prompts for the calibration
access code:
Code 22 for calibration
Code 0 or any code for calibration data checking.
Press the CAL key to acknowledge the calibration data or to proceed
within the calibration menu.
ENTER key
The ENTER key has the following functions:
Opens the Setup menu in Measurement mode
Saves (confirms) entered data in Setup mode.
Moving on within the function groups.
PLUS key and MINUS key
The PLUS and MINUS keys have the following functions:
Selection of function groups
Setting parameters and numeric values
Relay operation in manual mode (see Chap. 4.4).
Pressing the PLUS key allows you to switch between the current
output in % and mA.
Repeatedly pressing the PLUS key displays the following settings in
sequence as secondary measured values:
1. Temperature display in °F
2. Hides the temperature display
3. - 5. Measured value display in mg/l, % SAT, hPa
6. Sensor current in nA/mV
7. Current input signal in %
8. Current input signal in mA
9. Return to basic setting
Repeatedly pressing the MINUS key shows errors:
1. The current errors are displayed one after the other (max. 10)
2. After all the errors are displayed, the standard display is unhidden.
In function group F, you can define an alarm for each error code
separately.
REL key
The REL key toggles between the relay and manual cleaning start in
manual mode. In automatic mode you can output the corresponding
switch-on points (limit contactor) ot set points (PID controller) when
pressing the REL key. Pressing the PLUS key allows you to display the
settings of the following relay. Press the REL key to return to measuring
mode (automatic return after 30s).
AUTO key
Pressing the AUTO key switches between the automatic and manual
modes.
Escape function
Pressing the PLUS and MINUS keys simultaneously returns the display
to the main menu. Press the PLUS and MINUS keys again to return to
measuring mode.
Locking the keypad
Pressing the PLUS and ENTER keys simultaneously for minimum 3s
locks the keypad against unintentional entries. However, all settings can
still be read. The code prompt displays the code 9999.
Unlocking the keypad
Pressing the CAL and MINUS keys simultaneously for minimum 3s
unlocks the keypad. The code prompt displays the code 0:
Operation Liquisys M COM 223 F / 253 F
16 Endress+Hauser

4.4 Auto / manual mode of operation
Note:
•Enable the manual mode by
entering access code “22”.
•The operating mode remains in
effect even after a power failure.
•The manual mode takes
precedence over any other
automatic function (hold).
•Hardware locking in the manual
mode is not possible.
•The manual settings remain in
effect until they are actively reset.
•Error code E102 is signalled in the
manual mode.
Auto mode
In this mode, the relays are controlled by the transmitter.
REL key
In manual mode, the REL key is used to select one of the relays or the
cleaning function present in the instrument.
Switch to manual mode
Switch to manual mode for relay setting by pressing the following key
combination:
Press AUTO key.
Enter code 22. Confirm with ENTER key.
Select relay or function. Press the REL key to toggle between the relays.
The display shows the selected relay and the switching status (ON /
OFF) in the second line. In manual mode, the measuring value is
continuously displayed (e.g. for monitoring during dosage).
Set the relays. Switch on by pressing PLUS, switch off by pressing
MINUS. The relay remains in its switched state until it is switched over
again.
Press the AUTO key to return to the measuring mode.
All relais are controlled by the transmitter again.
OM253FE4.CHP
Liquisys M COM 223 F / 253 F Operation
Endress+Hauser 17

4.5 Operating concept
4.5.1 Operating modes
Note:
•If you do not press a key in Setup
mode for approx. 15 mins., the
system automatically jumps back
to Measuring mode. An active
Hold function (Hold at Setup) is
then reset.
Code
SET-MOD.CDR
Setup mode:
Access to all
configuration
settings
Measurement mode:
Standard operating status,
display of current
measured values
Press the PLUS or MINUS
key to select
the function group.
Calibration mode:
Runs through the
calibration procedure
Fig. 4.3
Description of possible
operating modes
Operation Liquisys M COM 223 F / 253 F
18 Endress+Hauser