Endress+Hauser mycom COM 121 User manual

BA 106C/07/en/09.97
Software version 6.02 or later
No. 50063021
mycom
COM 121 / 151
O2/ Temperature
Transmitter / Controller
Operating Instructions
µ

Please familiarise yourself with the instrument
before you take any other steps:
You wish to operate or reconfigure the instrument.
The operating concept is explained in these chapters:
When you encounter problems or when the instrument
requires maintenance, please refer to these chapters
for help:
General information
You wish to install and start up the instrument.
The required steps are described in these chapters:
Safety
Description
Installation
Start-up
Operation
Calibration
Description of operating functions
Limit contacter/time interval control
Diagnosis
Service and maintenance

Table of contents
1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Symbolsused ......................................................... 2
1.2 Conformity statement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Safety ............................................................... 3
2.1 Intended application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Generalsafetynotes.................................................... 3
2.3 Safetyfunctions........................................................ 3
3 Description........................................................... 4
3.1 Areas of application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3 Ordercode ........................................................... 5
3.4 Technicaldata......................................................... 6
4 Installation........................................................... 8
4.1 Storage and transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Unpacking............................................................ 8
4.3 Mounting ............................................................. 8
4.4 Mounting accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.5 Connection........................................................... 11
4.6 Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Start-up............................................................. 14
5.1 Measures before first power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Instrument status after first power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.3 Measures after first power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 Power failure handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 Operation........................................................... 15
6.1 Generalnotesonoperation.............................................. 15
6.2 Keyfunctions......................................................... 16
6.3 Hold function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.4 Operating matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Calibration.......................................................... 20
7.1 Calibration sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Description of operating functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Limit contacter and time interval control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.1 Limit contacter function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.2 Switching contact configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.3 Alarm function / fault signalling contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.4 Time interval control (timer function). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10 Diagnosis........................................................... 33
10.1 Error classes and error numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.2 Error display and handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
10.3 Errorlist............................................................. 34
11 Service and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.1 Cleaning............................................................. 36
11.2 Repairs.............................................................. 36
11.3 Preparation for storage, proper disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.4 Accessories.......................................................... 37
11.5 Index ............................................................... 38
mycom COM 121 / 151 Table of contents
Endress+Hauser 1

1. General information
1.1 Symbols used
Warning
This symbol alerts to hazards which
may cause irreparable damage.
Caution
This symbol alerts to possible
malfunction due to operator error.
Note
This symbol indicates important
items of information.
1.2 Conformity statement
The Mycom COM 121 / 151 has been
developed and manufactured in accordance
with currently valid European standards and
directives.
Note:
The corresponding certificate of
conformity may be requested from
Endress+Hauser.
General information mycom COM 121 / 151
2Endress+Hauser

2. Safety
2.1 Intended application
Note:
These installation and operating
instructions describe the O2
instrument Mycom COM 121 / 151
equipped with all the options.
The Mycom COM 121 / 151 is a
microprocessor-based measuring
and control instrument used to
determine the dissolved O2value.
State-of-the-art engineering allows
the instrument to be adapted to all
dissolved oxygen measuring tasks in
a simple manner.
A bilateral limit monitor with two
additional long-term time generators
permits oxygen control and auto-
matic nitrification/denitrification
control systems to be implemented.
Digital interfaces require separate
operating instructions from the
Mycom family of instruments:
Mycom Serial Interfaces
BA 090C/07/en
The separate operating instructions
BA 965C/07/en are required for the
oxygen sensors COS 3 / COS 3S.
2.3 Safety functions
•Access code: Unauthorised access to the
calibration and configuration data of the
measuring transmitter is effectively
prevented by access codes. The instrument
settings can be read at any time without
entry of an access code.
•Alarm function: System errors, malfunction
and continued violation of a limit will result in
an alarm signalled by an alarm contact.
The alarm signalling contact is fail-safe by
design, i.e. an alarm condition will also be
signalled in the event of a power failure.
•Data integrity: The instrument configuration
is retained even after a power failure.
•Immunity to interference: This instrument
is protected against interference, such as
pulse-shaped transients, high frequency
and electrostatic discharges, according to
the applicable European standards.
This is only valid, however, for an instrument
connected according to the notes in these
installation and operating instructions.
2.2 General safety notes
Warning:
Operating the 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.
Installation, start-up and operation:
The Mycom COM 121/151 instrument
has been designed and
manufactured for safe operation
according to the state of the art in
engineering and conforms to the
relevant regulations and EC
directives (see "Technical data").
However, if used improperly or other
than for the intended purpose, it may
be hazardous, e.g. due to improper
connection.
Installation, electrical connection,
start-up, operation and maintenance
of the measuring system must
therefore be performed exclusively
by trained specialist personnel
properly authorised by the system
operator for such work. The
specialist personnel must have read
and understood these operating
instructions and must adhere to the
instructions contained therein.
BE1OM151.CHP
mycom COM 121 / 151 Safety
Endress+Hauser 3

3. Description
3.1 Areas of application
Typical areas of application are:
•Waste water treatment
•Sewage treatment plants
•Water treatment
•Drinking water
•Water monitoring
•Fish farming
3.2 Measuring system
The measuring system consists of:
•the oxygen sensor COS 3 / COS 3S
•an appropriate immersion or flow assembly
•the O2measuring instrument Mycom COM
151 in the field housing
or
•the Mycom COM 121 instrument in the
housing for panel mounting
Plastic shackle
Star handle
Weather protection cover
Filler plug
Upright post,
square tube
1.4301
Transverse pipe 1.4301
➂
➀
➁
Fig. 3.1: Example of a complete
measuring system with:
➀Mycom COM 151 with weather
protection cover installed
➁Universal suspension assembly
holder
➂O2assembly COA 110-40 with
oxygen sensor COS 3 installed
Description mycom COM 121 / 151
4Endress+Hauser

3.3 Order code
Fig. 3.2: Nameplate of
Mycom COM 121
Mycom COM 121 / 151
Types
121 dissolved O2measuring transmitter for panel mounting, 96 x 96 mm,
ingress protection IP 54 (front)
151 field transmitter, 247 x 167 x 111 mm (H x W x D), ingress protection IP 65
Versions
1 with fault signalling contact
3 with fault signalling contact and 2 limit contacts
9 special version
Measuring range
A 0 ... 20 mg O2/ l
B 0 ... 200 % saturation
Y special version
Power supply
0 230 V AC, 50 / 60 Hz
1 110 V AC, 50 / 60 Hz
2 200 V AC, 50 / 60 Hz
3 24 V AC, 50 / 60 Hz
4 48 V AC, 50 / 60 Hz
5 100 V AC, 50 / 60 Hz
6 127 V AC, 50 / 60 Hz
7 240 V AC, 50 / 60 Hz
8 24 V DC
Outputs
0 0/4 ... 20 mA for O2
1 0/4 ... 20 mA for O2and temperature
3 0/4 ... 20 mA for O2with additional RS 232-C interface
6 0/4 ... 20 mA for O2value
with additional RS 485 / E+H Rackbus interface
9 special version
COM – ⇐complete order code
Fig. 3.3:
Nameplate of
Mycom COM 151
BE1OM151.CHP
mycom COM 121 / 151 Description
Endress+Hauser 5

3.4 Technical data
Electrical data
O2measurement with oxygen sensors COS 3 / COS 3S
Display range O2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 …20 mg / l ; 0 …200 % SAT
Measured value resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.5 % of upper range value
Zero point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . sensor has no zero current
Automatic temperature compensation range . . . . . . . . . . 0 …50 °C ; –20 …+60 °C with SAT
Status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LEDs, red or red / green
Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 NTC (in O2sensor)
Air pressure measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . integrated pressure sensor
Reference temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20 °C
O2signal input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 8 V at 200 kΩ
Slope adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 60 …120 % referred to normal conditions
Normal conditions . . . . . . . . . . . . . . . . . . . . . . approx. –4 mV / mbar O2(1013 mbar, 20 °C)
O2signal output (galvanically separated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 / 4 ... 20 mA
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. max. 600 Ω
O2signal output range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . adjustable from ∆2 …∆20 mg / l
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . or from ∆20 …200 % SAT
Temperature measurement
Temperature measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10 …+60 °C
Temperature signal output (variant). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 or 4 …20 mA
Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. max. 400 Ω
Temperature output range . . . . . . . . . . . . . . . . . . . . . . . . . . . . adjustable from ∆25 …∆165 K
Temperature calibration offset . . . . . . . . . . . . . . . . . . . . . . . . . adjustable from –3.0 …+3.0 °C
Limit contacter, timer and alarm functions
Limit contacter / time interval control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 contact outputs
Function type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MIN or MAX (direct / inverted)
Setpoint settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 …20 mg / l or 0 …200 % SAT
Hysteresis for switching contacts . . . . . . . . . . . . . . . . . . . . . . . 0 …5 mg / l or 0 …50 % SAT
Timer interval period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 …1440 min
Contact delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pickup / dropout
Delay period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 …6000 s
Alarm threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 …10 mg / l or 0 …100 % SAT
Alarm delay period. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 …6000 s
General technical data
Measured value display . . . . . . . . . . . . . . . . LC display, 7 segments, 4 digits, height = 10 mm
Indication error of measurement
Display (acc. to DIN IEC 746) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 %
Measured value output (acc. to DIN IEC 746). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 %
Status indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LEDs, red and red / green
Electromagnetic compatibility (EMC)
Emission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . according to DIN EN 50081-1, 01.92
Immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . according to DIN EN 50082-1, 03.93
Ambient temperature, nominal operating range . . . . . . . . . . . . . . . . . . . . . . . . . –10 …+55 °C
Ambient temperature, limit operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20 …+60 °C
Ambient temperature for storage and transport . . . . . . . . . . . . . . . . . . . . . . . . . –25 …+85 °C
Relative humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 …90 % (non-condensing)
Description mycom COM 121 / 151
6Endress+Hauser

Electrical data (continued)
Physical data
Electrical data and connections
AC power supply . . . . . . . . . . . . . . . . . . 24, 48, 100, 110, 127, 200, 230, 240 V, –15 …+10 %
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 …60 Hz, ±6 %
DC power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 V, –20 …+15 %
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 VA
Contact outputs on COM 121 . . . . . . . . . . . . . . 2 changeover contacts, 1 floating NO contact
Contact outputs on COM 151 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 changeover contacts
Switching voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 250 V AC
Switching current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 3 A
Switching power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 500 VA
Signal outputs . . . . . . . . . . . . . . . . . . . . . . . . . . 1 or 2 x 0 / 4 …20 mA, galvanically separated
Insulation voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 650 Vp-p
Auxiliary power supply output . . . . . . . . . . . . . . . . . . . . . . . . ±8.5 V, max. 10 mA (Ri= 400 Ω)
Digital interface (variant) . . . . . . . . . . . . . . . . . . optionally RS 232-C, RS 485 or E+H Rackbus
Hold input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ext. floating NO contact
Input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . max. 10 mA
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . terminal block, removable
Max. conductor cross section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 mm2
Dimensions / weights / protection
COM 121
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 x 96 x 176.5 mm (HxWxD)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 kg
Ingress protection (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 54
Housing material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . polycarbonate
Front of housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . polyester
COM 151
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247 x 167 x 111 mm (HxWxD)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 kg
Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 65
Housing material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GD-ALSI (Mg component > 0.05 %)
Paintwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-component PU-varnish
Front of housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . polyester, UV-resistant
BE1OM151.CHP
mycom COM 121 / 151 Description
Endress+Hauser 7

4. Installation
4.1 Storage and transport
The packaging material used to store or
transport the instrument must provide shock
and moisture protection. Optimal protection
is provided by the original packaging
materials. Conformance with the ambient
conditions (see technical data) must be
assured.
4.2 Unpacking
•Inspect for any damaged packaging!
The post office or freight carrier must be
informed of any damage.
Damaged packaging material must be
retained until the matter has been settled.
•Verify that the contents are undamaged!
Inform the post office or freight carrier as
well as the supplier of any damage.
•Check that the delivery is complete and
agrees with the shipping documents. Refer
to the nameplate (see fig. 3.2 or 3.3) to
verify that you have received the instrument
type and version ordered.
The scope of delivery of the Mycom
COM 121 (panel-mounted unit) comprises:
•2 housing fastening elements
(order no. 50047795)
•1 submin D connector (only for instruments
equipped with a digital interface)
(order no. 50051998)
•Installation and operating instructions
•Instrument identification card(s)
The scope of delivery of the Mycom
COM 151 comprises:
•1 housing mounting kit
(order no. 50061357)
•1 measuring point identification label
(order no. 50061359)
•Installation and operating instructions
•Instrument identification card(s)
If you have any questions, consult your
supplier or the Endress+Hauser sales agency
in your area (see back cover of these
installation and operating instructions for
addresses).
4.3 Mounting
The instrument can be mounted as follows:
•COM 121: panel installation
•COM 151: – panel installation
CPM 151-P:– wall installation
CPM 151-P:– post installation
Panel installation of COM 121
The mounting cutout required according to
DIN 43 700 is 92+0.5 x 92+0.5 mm.
The instrument is installed using the supplied
housing mounting elements. The required
installation depth is approx. 180 mm.
µ
Mounting cutout:
92+0.5 x 92+0.5 mm
96
96
121-ABM.EPS
92
56
32
max. 176.5
max. 45
Flat packing
(included)
Fig. 4.1: Dimensions of
Mycom COM 121/151
Installation mycom COM 121 / 151
8Endress+Hauser