Endress+Hauser Liquisys M CLM 223 User manual

BA 193C/07/en/12.01
51500270
Valid from software version:
2.20
Liquisys M
CLM 223 / 253
Transmitter for Conductivity
ENDRESS+HAUSER
LIQUISYS S
ENDRESS+HAUSER
LIQUISYS S
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

LM253E00.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, packaging and disposal ........................................... 2
1.5 Product structure ........................................................... 3
2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Intended application ........................................................ 4
2.2 General Safety notes ........................................................ 4
2.3 Installation, start-up, operation ................................................ 4
2.4 Monitoring and safety features ................................................ 5
2.5 Immunity to interference ..................................................... 5
2.6 Certificate 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 Measuring cell installation and cable connection ................................. 14
4 Operation........................................................... 16
4.1 Operator interface ......................................................... 16
4.2 Display .................................................................. 16
4.3 Key functions ............................................................. 17
4.4 Auto / manual mode of operation.............................................. 18
4.5 Operating concept......................................................... 19
5 Instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1 Start-up ................................................................. 24
5.2 System configuration ....................................................... 24
5.3 Current outputs ........................................................... 26
5.4 Monitoring functions........................................................ 28
5.5 Relay contact configuration .................................................. 31
5.6 Temperature compensation.................................................. 42
5.7 Concentration measurement ................................................. 44
5.8 Service .................................................................. 46
5.9 E+H Service .............................................................. 48
5.10 Interfaces ................................................................ 48
5.11 Calibration ............................................................... 49
6 Interfaces........................................................... 52
7 Maintenance and troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.1 Troubleshooting common problems ........................................... 53
7.2 Troubleshooting using the error messages ...................................... 57
8 Diagnosis and corrective maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.1 Diagnosis ................................................................ 59
8.2 Corrective maintenance of Liquisys M CLM 223 .................................. 61
8.3 Corrective maintenance of Liquisys M CLM 253 .................................. 64
8.4 Spare parts orders ......................................................... 67
8.5 Service equipment »Optoscope« with »Scopeware« .............................. 67
8.6 Corrective maintenance of measuring system ................................... 68
9 Accessories ......................................................... 71
10 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
11 Appendix........................................................... 76
12 Index............................................................... 80
Liquisys M CLM 223 / 253 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 incorrect
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 the ambient conditions
(see Technical data) must be assured.
1.3 Unpacking
Verify that the packaging and contents are
undamaged! Inform the post office or freight
carrier of any damage. Damaged
merchandise must be retained until the matter
has been settled.
Check that the delivery 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 instrument.
If you have any questions, consult your
supplier or the Endress+Hauser sales agency
for your area (see back cover of these
Operating Instructions for addresses).
The delivery includes:
•Transmitter CLM 223 (panel-mounted
instrument) or CLM 253 (field instrument)
•Operating instructions BA 193C/07/en
•Panel-mounted instrument:
–1 set of plug-in screw terminals
–2 clamping screws for panel mounting
•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, packaging and disposal
Package the assembly properly for reuse at a
later point in time. Optimal protection is
provided by the original packaging materials.
Oberserve local regulations for disposal.
General information Liquisys M CLM 223 / 253
2Endress+Hauser

1.5 Product structure
You can identify the instrument version by the
order code on the nameplate. Sub “codes”
are the release codes for Software upgrade
shown for Chemoclean (left of diagonal line)
or Plus package (right of diagonal line).
Additional functions of the Plus package (CS and IS versions)
• Current output table, fields O23x
• Monitoring for sensor and process,
function group P
• Cleaning (Chemoclean), fields R25x
• Automatic start of cleaning function Field F8
• Measurement according to USP 23 with
prealarm, Fields R26x (only conductive
with relay card)
• Concentration measurement, function group K
• Adaptive calibration, Fields C13x
(only inductive)
131085-4B
ENDRESS+HAUSER
LIQUISYS-M
order code / Best.Nr.
serial no. / Ser.-Nr. Codes:
:
:
:
:
:
:
:
:
:
prot. class / Schutzart
ambient temp. / Umgebungstemperatur
output 1 / Ausgang 1
output 2 / Ausgang 2
mains / Netz
measuring range / Messbereich
temperature / Temperatur
CLM 223-CD0110
123456
0...2000 mS/cm
conductivity cond./ Leitfähigkeit kond.
-35...250 °C
0/4...20 mA
0/4...20 mA
230 VAC 50/60 Hz 7,5 VA
-10...+55 °C
IP54 / IP30
1234 / 5678
TYPLF223.CDR
Fig 1.1 Nameplate CLM 223
(left)
131085-4B
ENDRESS+HAUSER
LIQUISYS-M
order code / Best.Nr.
serial no. / Ser.-Nr. Codes:
:
:
:
:
:
:
:
:
:
prot. class / Schutzart
ambient temp. / Umgebungstemperatur
output 1 / Ausgang 1
output 2 / Ausgang 2
mains / Netz
measuring range / Messbereich
temperature / Temperatur
CLM 253-CD0110
123456
0...2000 mS/cm
conductivity cond./ Leitfähigkeit kond.
-35...250 °C
0/4...20 mA
0/4...20 mA
230 VAC 50/60 Hz 7,5 VA
-10...+55 °C
IP65
1234 / 5678
TYPLF253.CDR
Fig. 1.2 Nameplate CLM 253
(right)
Liquisys M CLM 223 / 253
Version
CD Conductivity/resistance measurement (Two-electrode sensor)
CS Conductivity/resistance measurement (Two-electrode sensor)
with additional functions (Plus package)
ID Conductivity measurement (inductive sensor)
IS Conductivity measurement (ind. sensor) with additional functions (Plus package)
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 AC
7 Power supply 24 AC, CSA Gen. Purp.
8 Power supply 24 V AC/DC
Measurement output
0 Conductivity / resistance
1 Conductivity / resistance and temperature
3 PROFIBUS-PA
4 PROFIBUS-DP
5 Conductivity / resistance with HART®
6 Conductivity / resistance, temperature and HART®
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)
Additional equipment
PRL Protective varnishing
YYY Special version to customer requirements
CLM253-
complete order code
CLM223-
LM253E01.CHP
Liquisys M CLM 223 / 253 General information
Endress+Hauser 3

2 Safety instructions
2.1 Intended application
Liquisys M CLM 223 / 253 is a field-tested
and reliable transmitter to determine the
conductivity and resistance of fluid media.
Liquisys M CLM 223 F / 253 F is particularly
suitable for use in the following areas of
application:
•Chemicals
•Pharmaceuticals
•Food industry
•Drinking water treatment
•Condensate treatment
•Municipal sewage treatment plants
•Water conditioning
2.2 General safety notes
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 with
regard to safety aspects.
However, if used imporperly 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 com-
promise the safety and function of
the measuring system and is
therefore impermissible.
•The notes and warnings in these
installation and operating instruc-
tions must be strictly adhered to!
2.3 Installation, start-up, operation
Warning:
•This device may only be installed,
connected electrically, commis-
sioned, 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 discon-
necting 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 slots (only CLM 223).
•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.
•Measuring point faults may only
be repaired by authorised and
trained personnel.
•If faults cannot be remedied, the
instrument must be removed from
service and secured to prevent
accidental start-up.
•Repairs not described in these
operating instructions may only be
performed at the manufacturer’s
works or by the Endress+Hauser
Service Organization.
Safety instructions Liquisys M CLM 223 / 253
4Endress+Hauser

2.4 Monitoring and safety features
Safety features
The transmitter is protected against external
influences and damage by the following
design measures:
•Rugged housing
•Degree of protection provided by
enclosure: IP 65 (CLM 253)
•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 electro-
magnetic compatibility. It is protected against
electromagnetic interference by the following
design measures:
•Cable screen
•Interference suppresser filter
•Interference suppression capacitors
Warning:
The specified immunity to inter-
ference only applies for devices
connected as outlined in these
operating instructions.
2.6 Declaration of conformity
The CLM 223/253 transmitter has been
developed and manufactured in accordance
with currently valid European standards and
directives.
E+H certifies the compliance with the
standards by using the 4sign.
LM253E02.CHP
Liquisys M CLM 223 / 253 Safety instructions
Endress+Hauser 5

3 Installation
The following procedure should be followed for a complete measuring system installation:
•Installation or attachment of transmitter
(see chapter 3.3)
•Selection and connection of cables and
sensor (see chapter 3.4, 3.5 and 9)
•Installation is followed by start-up (see
chapter 5).
3.1 Measuring system
The complete measuring system comprises:
•The Liquisys M CLM 223 or CLM 253
transmitter
•A sensor with or without an integrated
temperature sensor
•A measuring cable CYK 71 (conductive
measurement) or measuring cable CLK 5
as fixed cable with sensor (inductive
measurement).
Optional:
•Extension cable CYK 71 (conductive) or
CLK 5 (inductive)
•Junction box VBM.
ENDRESS+HAUSER
LIQUISYS S
CAL REL
REL1
REL1
ALARM
REL2
REL2
E
ENDRESS+HAUSER
LIQUISYS S
CAL REL
REL1
REL1
ALARM
REL2
REL2
E
LM253SYS.CDR
Immersion assembly
CLA 111
CLS 15
(conductive sensor
with integr. Pt 100)
CLS 21
(conductive sensor
with integr. Pt 100)
CLS 50
(inductive sensor
with integr. Pt 100)
Liquisys M CLM 253
Liquisys M CLM 223
CLS 52
(inductive sensor
with integr. Pt 100)
Fig. 3.1
Complete measuring
devices Liquisys M CLM
223 / 253 with measuring
cable, assembly and
conductivity sensor
Installation Liquisys M CLM 223 / 253
6Endress+Hauser

3.2 Dimensions
ENDRESS+HAUSER
LIQUISYS S
CAL REL
REL 1
REL 1
ALARM
REL 2
REL 2
E
FELD1.CDR
11
170
247
115
∅6
157
154
70
70
Pg 13.5
Pg 7
Pg 16
Fig. 3.2
Dimensions of Liquisys M
CLM 253
FELD2.CDR
1
2
3
4
Fig. 3.3
Inside of housing of
Liquisys M CLM 253
1 Removable
electronics box
2 Partition plate
3 Terminal blocks
4 Fuse
LM253E03.CHP
Liquisys M CLM 223 / 253 Installation
Endress+Hauser 7

3.3 Mounting
3.3.1 Field instrument
Several mounting versions are available for
the Liquisys M in the field instrument version:
•Post mounting on cylindrical pipes
•Post mounting on a square post
•Wall mounting using fastening screws.
Weather protection cover CYY 101 can be
used for outdoor installation in conjunction
with all mounting versions.
Note:
If installed outdoors, weather
protection cover required.
Weather protection cover CYY 101
Weather protection cover for outdoor
installation, to be mounted on field instrument;
material: stainless steel SS 304;
order no.: CYY 101-A
For post or pipe installation, the post
mounting kit is additionally required.
EINBAU2.CDR
96
6
139
90
Fig. 3.4
Liquisys M CLM 223,
panel-mounted version
DACH.CDR
300
270
320
Fig. 3.5
Weather protection cover
for field instruments
Installation Liquisys M CLM 223 / 253
8Endress+Hauser

Post mounting kit
Mounting kit for installation of field housing on
horizontal and vertical pipes (max. ∅60 mm);
also aids mounting of weather protection
cover.
Material: stainless steel SS 304
Order no.: 50086842
Universal mounting post CYY 102
Square tube for mounting of measuring
transmitters;
Material: stainless steel SS 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
∅max. 60
Fig. 3.6
left:
Mounting kit
for post mounting on
cylindrical pipes
right:
Square mounting post
LM253E03.CHP
Liquisys M CLM 223 / 253 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 CLM 223 / 253
10 Endress+Hauser

3.3.3 Panel-mounted instrument
The instrument is attached using the supplied tensioning screws (see Fig. 3.9).
The required overall installation depth is approx. 165 mm.
MONT9.CDR
92+0.5
92+0,5
90
57
33
approx.
25
max. 45
96
92
1
2
3
139 6
3
Fig. 3.9
Attachment of
panel-mounted instrument
1 Wall of control
cabinet
2 Gasket
3 Tensioning screws
LM253E03.CHP
Liquisys M CLM 223 / 253 Installation
Endress+Hauser 11

3.4 Electrical connection
Connection diagram
The connection diagram depicted in Fig. 3.10 shows the connections for an inductive or a
conductive sensor (dashed lines). The connection for the various sensors is shown in more
detail in the figures 3.13 to 3.15
Note:
•The instrument has protection
class II and is generally operated
without protective earth
connection.
•However you require a ground
connection to ground the
measuring cable screening.
•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.
11
12
13
47
48
49
57
58
59
15 V
85
86
10-50 V
81
82
10-50 V
93
94
41
42
43
Lf
mA
31
32
mA
33
34
51
52
53
54
55
56
S
84
83
15
16
84
PE
83
L+
L–N
L1
∼=
PE
ANLF01.CDR
Auxiliary voltage
output
Digital
input 2
(Chemoclean)
Digital
input 1
(Hold)
Signal output 2
temperature
Signal output 1
conductivity
Temperature
Sensor
(conductive)
Sensor
(inductive)
Alarm
(current-free
contact position)
Relay 1
(current-free
contact position)
Relay 2
(current-free
contact position)
Relay 3
(current-free
contact position)
for Chemoclean:
Water
Relay 4
(current-free
contact position)
for Chemoclean:
Cleaner
Mains
Ground terminal
Fig. 3.10
Electrical connection of
Liquisys M CLM 223 / 253
with full connection
Installation Liquisys M CLM 223 / 253
12 Endress+Hauser

Connections of field instrument
For connection, the measuring cables are introduced through the cable glands on the field
instrument and connected according to the connection diagram in figures 3.10 and 3.11.
Note:
•Please label the sensor terminal
block with the enclosed sticker.
•Connect the ground terminal with
PE.
Caution!
•Terminal designated as NC
may not be switched.
•Undesignated terminals
may not be switched.
Connections of panel-mounted instrument
42
+++++-----
434154 55 56
NC
12
13
11
31
83 84 15
32
16
3433
S
NC 938685 94 81 82 NC NC NC
51 52 53 57 58 59 47 48 49
Lf
Temp.
(opt.)
+15V
10mA
WH
YE
GN
REL 4SENSOR REL 3 REL 2 REL 1
131095-4E
CLM 253
Digital 2 Digital 1
11 12
13
NC
Mains
Hilfsenergie
L1
+
N
-
(AC)
(DC)
Contacts:
max. 2A
AC: 250V/500VA
DC: 30V/60W
131095E.CDR
Ground terminal
Fig. 3.11
Connection compartment
sticker for field
instrument CLM 253
31 +
32 -
33 +
34 -
85 +
NC
NC
NC
86 -
93 + S
94 - 42
81 + 43
82 - 41
Lf
Temp.
(opt.)
+15V
10mA
Digital 2
Digital 1
131082-4C
12
Sensor
15
84
13
11
16
83
YE
WH
GN
Mains Contacts: max. 2A, AC:250V/500VA, DC:30V/60W
L1 +
AC DC
N-
REL1
REL2
REL3
REL4
NC
NC
49
COM
COM
COM
COM
59
54
55
56
52
51
53
58
57
48
47
131084-4B
131082C.CDR
Ground
terminal
Fig. 3.12
Connection compartment
sticker for panel-mounted
instrument CLM 223
LM253E03.CHP
Liquisys M CLM 223 / 253 Installation
Endress+Hauser 13

3.5 Sensor installation and 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 conductivity 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 measuring cables
Measuring cable requirements
Sensor type Cable Extension
2-electrode sensors with or without
temperature sensor Pt 100 CYK 71 Junction box VBM + CYK 71
Inductive sensors CLS 50, CLS 52 Cable permanently
attached to sensor
Junction box VBM
+ CLK 5
Maximum cable length
Conductive conductivity
measurement max. 100 m with CYK 71 (corresponds to 10 nF)
Resistance measurement max. 15 m with CYK 71 (corresponds to 2 nF)
Inductive conductivity measurement max. 55 m (with CLK 5 and sensor cable)
KABEL.CDR
Inner connector
green (11)
white (12)
yellow (13)
CYK 71
Semi-conductor
screening Screen
green (11)
white (12)
yellow (13)
brown
(unused)
Semi-conductor
screening
white
red
CLK 5
brown
(unused)
black
(83)
(84)
(84) (83)
(15)
(16)
Fig. 3.13
Structure of special
measuring cables
CYK 71 (left) and
CLK 5 (right)
Installation Liquisys M CLM 223 / 253
14 Endress+Hauser

Examples for connection
Note:
•Ground the sensor screen in order
to ensure functional safety and
measuring stability of the
measuring system. For that
purpose, a PE ground terminal is
available. This is located on the
cover frame of the panel-mounted
instrument CLM 223, or in the
connection compartment of the
field instrument CLM 253.
•Ground the PE ground terminal.
CYK 71
ϑ
231
11 12 13PE
GN WH YE
GN WH YE
BK
BK
84 15 16 83
LM2X3CDE.CDR Fig. 3.14
Connection of conductive
sensors
(CLS 15, CLS 19,
CLS 20, CLS 21, CLS 30)
CLK 5 (fixed cable) CLK 5 (fixed cable)
ϑ ϑ
84 15 16 83 84 15 16 83
11 12 13 11 12 13
SS
WH RD WH RD
GN WH YE
oder
BN
GN WH YE
or
BN
BU RD RD BU BU RD RD BU
LM2X3IDE.CDR Fig. 3.15
Connection of conductive
sensors
(left: CLS 50,
right: CLS 52)
LM253E03.CHP
Liquisys M CLM 223 / 253 Installation
Endress+Hauser 15

4 Operation
4.1 Operator interface
4.2 Display
LED indicators
Liquid crystal display
12.15 mS/cm
R232
Setpoint
ENDRESS+HAUSER
LIQUISYS M
DISPLAY1.CDR
Liquid crystal display
for display of
measured values
and configurations
data
4 main control keys
for calibration and
instrument configuration Key for switching between
automatic / manual operation
LED indicators for
limit contactor relays
(switching state)
LED indicators for
alarm function
Display of active
contact and key for
relay switching
in manual mode
Field for labelling by
user
Fig. 4.1
Operating elements of
Liquisys M
Indication of current operating mode “Auto”(green LED) or “Manual”(yellow LED)
Indication for relay controlled in “Manual”mode (red LED)
Indicates the state of relays 1 and 2
LED green: Measured value within permissible limits, relay inactive
LED red: Measured value outside permissible limits, relay active
Alarm indication e.g. for continuous limit violation, temperature sensor failure or system errors
(see error list chapter 7)
1215
mS/cm
R232
Setpoint
DISPLAY3.CDR
Measuring mode
indicator (normal
operation)
Calibration mode
indicator
Setup mode
indicator
(configuration)
Error:
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
Rel 3/4 state
indicators:
inactive active
“Hold”mode indicator
(outputs reflect last
current status)
For instruments with
communication:
Indicator to receive
messages.
Constantly visible in
Burst mode (with HART)
Sensor symbol
flashes during
ongoing calibration
Fig. 4.2 Liquid crystal display
Operation Liquisys M CLM 223 / 253
16 Endress+Hauser

4.3 Key functions
CAL key
When the CAL key is pressed, the instrument prompts for the calibration
access code (fixed setting: 22 for calibration; any setting for calibration
data checking). Acknowledge with the CAL key to proceed. Calibration
uses the calibration data set in function group C.
ENTER key
The ENTER key has the following functions:
Opens the Setup menu in measuring mode
Stores (acknowledges) data entered 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 of parameters and numeric values
Relay operation in manual mode (see chapter 4.4).
Pressing the PLUS key allows you to switch between the current input
in % and mA.
Repeatedly pressing the PLUS key displays the following settings in
sequence as secondary measured values:
1. Temperature display in °F
2. Hide temperature display
3. Measured value display of uncompensated conductivity
4. Back to basic setting
Repeatedly pressing the MINUS key outputs 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 is used in manual mode to switch between the relays and
the manual start cleaning function.
AUTO key
The AUTO key is used to toggle between the automatic and manual
modes of operation.
Escape function
Press the PLUS and MINUS keys simultaneously to return 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 locks the keypad.
The code prompt displays the code 9999.
Unlocking the keypad
Pressing the CAL and MINUS keys simultaneously unlocks the keypad.
The code prompt displays the code 0.
LM253ED4.CHP
Liquisys M CLM 223 / 253 Operation
Endress+Hauser 17

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 of operation, the relays are controlled by the transmitter.
REL key
The REL key is used to select one of the relays present in the instrument.
Switching to manual mode
The instrument is switched to the manual mode for relay setting by
pressing the following keys:
Press AUTO key.
Enter code 22.
Select relay or function. Press the REL key to toggle between the relays.
The display shows the selected relay in the second line.
Set the relays. Switch on with PLUS, switch off with MINUS. The relay
remains in effects until it is actively reset.
Press AUTO key for returning to the measuring mode.
Operation Liquisys M CLM 223 / 253
18 Endress+Hauser