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

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

•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.

Mounting cutout:

92+0.5 x 92+0.5 mm

121-ABM.EPS

max. 176.5

max. 45

Flat packing

(included)

Fig. 4.1: Dimensions of

Mycom COM 121/151

Installation mycom COM 121 / 151

8Endress+Hauser

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