Hach-Lange SI794 D User Manual

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si794 D tr

Dissolved Oxygen (Traces)

4-Wire Transmitters

USER MANUAL

October 2008, Edition 1

DOC023.5 .90119

Return of products under warranty

Please contact our Service Team before returning a defective device. Ship the cleaned device to the address you have been given. If the device has been in contact with process fluids, it must be decontaminated/ disinfected before shipment. In that case, please attach a corresponding certificate, for the health and safety of our service personnel.

Disposal

Please observe the applicable local or national regulations concerning the disposal of “waste electrical and electronic equipment”.

Intended use ............................................................................5

Safety information .................................................................. 6

Overview of si794 D tr ...........................................................11

Assembly ................................................................................12

Mounting plan ..................................................................................... 13

Pipe mounting, panel mounting ................................................... 14

Installation and connection .................................................. 16

Installation instructions .................................................................... 16

Terminal assignments ........................................................................16

Wiring example .................................................................................... 19

Protective wiring of relay outputs ................................................ 20

Interface and navigation ...................................................... 22

User interface........................................................................................ 22

si794 display .......................................................................................... 23

Operation: Keypad ................................................................24

Safety functions ..................................................................... 25

Sensocheck, Sensoface sensor monitoring ............................... 25

Hold mode ........................................................................................... 26

External activation of HOLD mode ............................................... 27

Configuration .........................................................................28

Menu structure of configuration ................................................... 29

Overview of configuration steps ................................................... 30

Output 1 .................................................................................................32

Output 2 .................................................................................................40

Correction .............................................................................................. 46

Calibration mode ................................................................................ 48

Limit function .......................................................................................50

Relay 1 .................................................................................................... 50

Relay 2 .................................................................................................... 52

Controller ............................................................................................... 54

Control of rinsing probe ...................................................................56

Signaling parameter set 2 active ................................................... 57

Switchover of parameter sets (manual) ...................................... 58

Switching parameter sets using an external control signal 59

Default settings of parameter sets ...............................................61

Parameter set, individual settings ................................................. 62

Calibration ............................................................................. 64

Zero calibration .................................................................................... 70

Product calibration ............................................................................. 72

Calibration with sampling................................................................ 72

Temp probe adjustment ................................................................... 74

Measurement ......................................................................... 74

Diagnostics functions ........................................................... 75

Controller functions ..............................................................78

PID controller ........................................................................................ 78

Pulse length / pulse frequency controller.................................. 80

Error messages ...................................................................... 82

Calibration error messages .............................................................. 84

Operating states .................................................................... 84

Sensoface ...............................................................................86

Appendix ................................................................................ 89

Product line and accessories........................................................... 89

Specifications ........................................................................................ 90

Contact information .............................................................. 96

Limited warranty ...................................................................98

Index ..................................................................................... 100

Passcodes .............................................................................108

Intended use

The si794 D tr transmitter is used for dissolved oxygen and temperature measurement in biotechnology, pharmaceutical industry, as well as in the eld of environment, food processing, and sewage treatment. The transmitter provides a second current output for temperature measurement, a PID controller (making use of the relay contacts), and a universal power supply for 24 ... 230 V AC/DC. For CIP applications, you can switch between two parameter sets. The sturdy molded enclosure can be xed into a control panel or mounted on a wall or at a post. The protective hood provides additional protection against direct weather exposure and mechanical damage. The transmitter has been designed for application with amperometric sensors.

Safety information

Be sure to read and observe the following!

The device has been manufactured using state of the art technology and it complies with applicable safety regulations. When operating the device, certain conditions may nevertheless lead to danger for the operator or damage to the equipment. Therefore, please read this entire manual before unpacking, setting up, or operating this equipment. Pay particular attention to all danger and caution statements.

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if not observed. A symbol, if noted on the instrument, will be included with a danger or caution statement in the manual.

This symbol, if noted on the device, references the instruction manual for operation and/or safety information.

This symbol, when noted on a product enclosure or barrier, indicates that a risk of electric shock and/or electrocution exists.

This symbol, when noted on the product, identifies the location of a fuse or current limiting device.

This symbol, when noted on the product, identifies the location of the connection for Protective Earth (ground).

This symbol, when noted on the product, identifies a risk of chemical harm and indicates that only individuals qualified and trained to work with chemicals should handle chemicals or perform maintenance on chemical delivery systems associated with the equipment.

This symbol, when noted on the product, identifies the presence of a noxious substance and a risk of chemical harm. Only individuals qualified and trained to work with chemicals should handle chemicals or perform maintenance on chemical delivery systems associated with the equipment.

This symbol, when noted on the product, indicates the presence of devices sensitive to electrostatic discharge (ESD) and indicates that care must be taken to prevent damage with the equipment.

Electrical equipment marked with this symbol may not be disposed of in European public disposal systems after 12 August of 2005. In conformity with European local and national regulations (EU Directive 2002/96/EC), European electrical equipment users must now return old or end-of life equipment to the Producer for disposal at no charge to the user.

Note:

You can obtain instructions on the correct disposal of all (marked and unmarked) electrical products that have been supplied or manufactured by HachLange from your local Hach-Lange sales office.

Signal words for hazard information

This manual uses signal words to mark safety information. They are used alone or in combination with a safety symbol. If multiple hazards exist, this manual will use the signal word (Danger, Caution, Note) corresponding to the greatest hazard.

DANGER Indicates a potentially or imminently

hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION Indicates a potentially hazardous situation

that may result in minor or moderate injury.

Important Note Information that requires special

emphasis.

Note Information that supplements points in

the main text.

General safety information

Do not use or install the si794 transmitter in any manner other than that which is specified in this manual.

Important Note

Commissioning must only be carried out by trained personnel. Whenever it is likely that protection has been impaired, the device shall be made inoperative and secured against unintended operation. The safety of the transmitter may be impaired if any of the following conditions have occurred:

visible damage• failure to operate properly• storage above 70 °C for prolonged periods• exposure to severe transport stresses•

If any of these conditions have occurred, return the device to the manufacturer for recertification.

Note

Before commissioning it must be proved that the transmitter may be connected with other equipment.

Important Note

Working with chemical samples, standards, reagents, and waste presents potential hazards. The device must only be operated by trained personnel authorized by the operating company. The manufacturer is not liable for any damages caused by processrelated risks known to the operating company.

Information on how to prevent electrostatic discharges (ESD)

Important Note

The sensitive electronic components in the device can be damaged by static electricity. This can impair device performance and even lead to a complete failure of the device. Before connecting a sensor, for example, you should discharge any static electricity buildup from your body. To do so, you can touch an earth-grounded metal surface such as the chassis of a device or a metal conduit or pipe.

Overview of si794 D tr

Cathode

Do not connect!

Guard

Reference electrode

Anode

RTD

Shield

HOLD

HOLD/ CONTROL

CONTROL

O2 input

Temp input

Hold

input

Control

input

Output 1

Output 2

Alarm

Clean

Power

+ Output 1

– Output 1/2

+ Output 2

Relay 1

Relay 1/2

Relay 2

Alarm

Clean / PSet 2

Power

Assembly

76 5

Package contents

Check the shipment for transport damage and completeness. The package should contain:

• Front unit

• Rear unit

• Bag containing small parts

• User manual

• Specific test report

1 Jumper (2 x) 2 Washer (1 x), for conduit

mounting: Place washer between

enclosure and nut 3 Cable tie (3 x) 4 Hinge pin (1 x), insertable from

either side 5 Enclosure screw (4 x)

Fig.: Assembling the enclosure

6 Sealing insert (1 x) 7 Rubber reducer (1 x) 8 Strain relief (3 x) 9 Filler plug (3 x) 10 Hex nut (5 x) 11 Sealing plug (2 x),

for sealing in case of wall mounting

Mounting plan

144

105

6,2

Fig.: Mounting plan – All dimensions in mm!

1 Strain relief (3 x) 2 Strain relief or 1/2“ conduit

opening, ø 21.5 mm (2 x) Conduit hardware not included! 3 Knockout for pipe mounting (4 x ) 4 Knockout for wall mounting (2 x )

40 60

132

3 4

132165

173

Pipe mounting, panel mounting

1 Protective hood (LZY485) - if required

2 Hose clamp with worm gear drive to DIN 3017 (2 x) 3 Pipe-mount plate (1 x) 4 For vertical or horizontal posts or pipes 5 Self-tapping screw (4 x)

Fig.: Bracket kit (LZY483) – All dimensions in mm!

Fig.: LZY485 protective hood for wall and pipe mounting

– All dimensions in mm!

max. 25

78 27

1...22

1 Screw (4 x) 2 Gasket (1 x) 3 Control panel 4 Span piece (4 x) 5 Threaded sleeve (4 x)

Fig.: Panel mounting kit (LZY484) – All dimensions in mm!

Installation and connection

Installation instructions

Caution!

Any work on the electrical installation may only be undertaken by experienced and qualified personnel in accordance with the applicable local safety regulations.

• Always disconnect power to the device when making any electrical

connections!

• Be sure to follow the instructions in the user manual!

• Only connect the power supply when all internal wirings have been

completed and the system is correctly grounded! When using an external voltage supply, always connect a ground-fault circuit interrupter (tripping current max. 30 mA) between mains and controller system! A ground-fault circuit interrupter is not required when safety extra-low voltages (24 V DC supply via rechargeable batteries or 24 V DC/AC supply through an isolation transformer)! When operating the system outdoors, connect a surge voltage protection between mains and controller system! The terminals are suitable for single wires and flexible leads up to

2.5 mm² (AWG 14). Attach end ferrules to the leads.

Terminal assignments

Danger of electric shock!

Fig.: si794 D tr terminal assignments

1 ESD shield covering the signal inputs (Screw off for assembly)

Note:

The cable shield must end under the ESD shield. (Cut lines if required)

2 Terminals for temperature probe and outer shield 3 Terminals for sensor 4 Power supply connection

Fig.: Information on installation, rear side of device

Wiring example

Hamilton Oxyferm, Oxygold G, OxySens sensors

Color

Terminal

1 Cathode Transparent,

5 Jumper to 4

C Shield:

D RTD Green Yellow E RTD White Blue

Assignment

Anode Red,

Do not connect to ground!

Oxyferm Oxygold G

coax core

coax shield Yellow/green Copper wire

Oxysens

Transparent, coax core

Brown,

coax shield

Protective wiring of relay outputs

Protective wiring of relay contacts

Relay contacts are subject to electrical erosion. Especially with inductive and capacitive loads, the service life of the contacts will be reduced. For suppression of sparks and arcing, components such as RC combinations, nonlinear resistors, series resistors, and diodes should be used.

Typical AC applications with inductive load

1 Load 2 RC combination, e.g. RIFA PMR 209 Typical RC combinations for 230 V AC: Capacitor 0.1µF / 630V, Resistor 100 ohms / 1 W 3 Contact

Typical protective wiring measures

A: DC application with inductive load B: AC/DC applications with capacitive load C: Connection of incandescent lamps

A1 Inductive load A2 Free-wheeling diode, e.g. 1N4007 (Observe polarity) A3 Contact

B1 Capacitive load B2 Resistor, e.g. 8 Ω / 1 W at 24 V / 0.3 A B3 Contact

C1 Incandescent lamp, max 60 W / 230 V, 30 W / 115 V C3 Contact

Warning! Make sure that the maximum ratings of the relay contacts are not exceeded even during switching!

Interface and navigation

The si794 transmitter user interface contains a display, indicators, and keys for navigation and menu selection.

User interface

Use the arrow and enter keys to scroll through the menu and change settings. Use the indicators to identify which mode the transmitter is in.

Fig.: si794 user interface

1 Calibration key 7 Wash mode indicator

2 Congure key 8 Conguration mode indicator

3 Measure mode indicator 9 Up arrow key

4 Calibration mode indicator 10 Right arrow key

5 Alarm indication

6 Display

11 Enter key

Display

Interface and navigation

4.3 Display

Figure 11 identifies all of the possible icons and symbols that may be

seen in the si792 transmitter display.

The gure below identies all of the possible icons and symbols that may be seen in the si794 transmitter display.

Fig.: si794 display

1 Passcode 13 Secondary display 2 Temperature 14 Alarm mode 3 4–20 mA/HART output 15 Manual temperature on 4 Limit values 16 Calibration mode 5 Alarm 17 Hold mode active 6 Sensocheck: Sensor error 18 Hourglass (waiting indication) 7 Calibration active 19 Measure mode active 8 Calibration interval 20 Calibration complete

8 Parameter display 21 Calibration: zero or rst point 10 Enter prompt 22 Calibration: second point 11 Conguration mode 12 Main display

23 Sensofaces

Operation: Keypad

Start, end calibration

Start, end configuration

Select digit position (selected position blinks)

Edit digit

• Calibration:

Continue in program sequence

• Conguration: Conrm entries,

next conguration step

• Measuring mode: Display output current

Cal Info: Display of zero current and slope

Error Info: Display of last error message

Start GainCheck device self-test

Safety features

Sensocheck, Sensoface sensor monitoring

Sensocheck continuously monitors the sensor and lines.

Sensocheck can be switched off (Configuration, Pg 49).

Sensoface provides information on the sensor condition. The slope and response time during calibration are evaluated. The three Sensoface indicators provide the user with information on wear and required maintenance of the sensor.

GainCheck device self-test

A display test is carried out, the software version is displayed, and the memory and signal transfer are checked.

Start GainCheck device self-test:

Automatic device self-test

The automatic device self-test checks the memory and signal transfer. It runs automatically in the background at fixed intervals.

Safety functions

Hold mode

Display:

The Hold mode is a safety state during conguration and calibration. Output current is frozen (Last) or set to a xed value (Fix). Alarm and limit contacts are disabled. If the calibration or conguration mode is exited, the transmitter remains in the Hold mode for safety reasons. This prevents undesirable reactions of the connected peripherals due to incorrect conguration or calibration. The measured value and “HOLD” are displayed alternately. The transmitter only returns to measuring mode after enter is pressed and 20 seconds have passed.

Conguration mode is also exited automatically 20 minutes (timeout) after the last keystroke. The transmitter returns to measuring mode.

Timeout is not active during calibration.

Response of output signal: Last: The output current is frozen at its last value.

Recommended for short conguration procedures. The process should not change decisively during conguration. Changes are not noticed with this setting!

Fix: The output current is set to a value that is noticeably

dierent from the process value in order to signal the control system that the transmitter is being worked at.

External activation of HOLD mode

The Hold mode can be activated from outside by sending a signal to the Hold input (e.g. from the process control system).

Power supply

Hold

12...24 V AC/DC

input

si794

Process control system

Hold active Hold inactive 10 ... 30 V AC/DC 0 ... 2 V AC/DC

Alarm

The alarm delay is congurable. During an error message the alarm LED blinks or lights.

Error messages can also be signaled by a 22 mA output current.

The alarm contact is activated by alarm or power failure, see also Pg 27.

The alarm LED on the front panel can be congured as follows HOLD o: Alarm: LED blinks HOLD on: Alarm: LED on. HOLD: LED blinks

Configuration

In the Configuration mode you set the device parameters. The device can store two different parameter sets and switch between them. Sensor data and “Clean/Pset2” output are edited in parameter set 1 only. They are valid for both parameter sets.

Configuring

Parameter set 1

Configure:

Press conf.

Enter mode code “1200”: Edit parameter set 1 with and , confirm/proceed with enter.

Parameter set 2

Configure: “88” appears in the display.

Enter mode code “1288”: Edit parameter set 2 with firm/proceed with enter.

and , con-

The output current is frozen

Hold

During configuration the device remains in the Hold mode.

Input errors

HOLD icon

(at its last value or at a preset fixed value, depending on the configuration), limit and alarm contacts are inactive. The controller is in the configured state, Sensoface is off, mode indicator “Configuration” is on.

The configuration parameters are checked during the input. In the case of an incorrect input “Err” is displayed for approx. 3 s. The incorrect parameters cannot be stored. Input must be repeated.

End End with conf. The measured value

and Hold are displayed alternately, “enter” flashes. End Hold mode with enter . The display shows the measured value. The output current remains frozen for another 20 s (HOLD icon on, “hourglass” flashes).

Menu structure of conguration

The conguration steps are assigned to dierent menu groups. Use the arrow keys to jump between the individual menu groups. Each menu group contains menu items for setting the parameters. Press enter to access a menu item. Use the arrow keys to edit values. Press enter to conrm/save the settings. To return to measurement, press conf and then enter.

Select menu group

Menu group Code Display

Output 1 o1.

Menu item 1

Menu item 2

Menu item ...

Output 2 o2.

Temperature compensation

Calibration mode CA.

Alarm settings AL.

Relay rL.

Cleaning contact PSet 2 selection

tc.

Cn.

...

Select menu item

Previous menu group:

Overview of conguration steps

Code

Output 1

out1

o1.

Select sensor type Select saturation / concentration Select current range Enter current start Enter current end Time averaging filter 22 mA signal in the case of error Signal

response

Enter fixed value

Output 2

out2

o2.

Select temperature unit Select temperature probe Select current range Enter current start Enter current end Time averaging filter 22 mA signal for temp error Signal

response

Enter fixed value

Correction

Corr

Co.

Enter polarization voltage Select pressure unit Select process pressure correction Enter salinity correction

Calibration mode

CAL

CA.

Select saturation / concentration Enter cal timer interval

during HOLD

Choices

Standard (Type A) / Traces (Type B)

% / mg/L, ppm 0-20 mA / 4-20 mA xxxx xxxx xxxx sec ON / OFF Last / Fix xxx.x mA

°C / °F 22NTC / 30NTC 0-20 mA / 4-20 mA xxx.x xxx.x xxxx sec ON / OFF Last / Fix xxx.x mA

0675 mV / xxxx mV bar / kPa / PSi x.xxx bar / 1.013 bar xx.xx mg/L

SAt / Conc xxxx h

Code

Alarm settings

ALr

Select Sensocheck

AL.

Enter alarm delay LED in HOLD mode

Relay 1/2: Limit values, controller

rLAY

rL.

Select limit function / controller

Select contact function

L1.

Select contact response Enter setpoint Enter hysteresis Enter delay Select contact function

L2.

Select contact response Enter setpoint Enter hysteresis Enter delay Enter controller setpoint

Ct.

Enter neutral zone (P) Controller gain K (I) Reset time TR (D) Rate time TD Pulse length / Pulse frequency PLC: Pulse length PFC: Pulse frequency Select HOLD response

Cleaning contact

Cln.

Select cleaning contact or signaling of

Cn.

parameter set 2

rinse

Cleaning interval Cleaning duration Select contact response

Choices

ON / OFF xxxx sec ON / OFF

LiMIT / CtROL Lo / Hi N/O / N/C xxxx xxxx xxxx SEC xxxx sec N/O / N/C xxxx xxxx xxxx SEC xxxx xxxx xxxx %

xxxx SEC xxxx SEC PLC / PFC xxxx SEC xxxx /min

Y Last / Y Off

rinse / Pset2 rinse

xxx.x h 000.0 h xxxx SEC 0060 SEC

N/O / N/C N/O

Conguration Output 1 Select sensor type / Measurement procedure

Menu group

Output 1

Code

o1.

Display

*) Type A sensors (standard applications):

Hamilton Oxyferm Hamilton Oxysens

Type B sensor (traces):

Hamilton Oxygold

Select menu item

Select sensor type*

Select meas. procedure

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit: Press conf, then enter.

Note: The si794 D tr has as device a resolution of 0.01 ppm.

Code Display

o1.

After correct input a welcome text (CONF) is displayed for approx. 3 sec

Action

Select configuration (Press conf key).

Enter passcode “1200” (Select position using arrow key and edit number using key. When the display reads “1200”, press enter to confirm.)

The transmitter is in the HOLD mode (HOLD icon is active).

Select sensor Type A / B

(see table on left-hand side) Select using arrow key. Press enter to proceed.

Choices

Type A,

Type B

Select measurement procedure (valid for all following settings):

• SAt: Saturation (%)

• Conc: Concentration (mg/L

or ppm) Select using arrow key. Press enter to proceed.

Note: Characters represented in gray are blinking and can be edited.

mg/L ppm

Conguration

Output 1 Output current range / Current start / Current end.

Menu group

Output 1

Code

o1.

Display

Select menu item

Select sensor type

Select meas. procedure

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit: Press conf, then enter.

Code

o1.

Display

Action

Set output current range Select using key. Press enter to proceed.

Choices

4 - 20 mA

(0 - 20 mA)

Current start Enter lower end of scale, depending on the measurement procedure selected (Saturation or

0000 %

(mg/L, ppm)

Concentration)

Select position using , edit number using , press enter to proceed.

Current end Enter upper end of scale, depending on the measurement procedure selected (Saturation or

0100 %

(mg/L, ppm)

Concentration)

Select position using , edit number using , press enter to proceed.

Assignment of measured values: Current start and current end

Example 1: Range 0 ... 100 % Example 2: Range 50 ... 70%.

[%]

Oxygen

100

saturation

Output current

20 4

Advantage: Higher resolution in

[mA]

[%]

range of interest

Oxygen saturation

Output current

[mA]

20 4

Conguration

Output 1 Time averaging lter

Menu group

Output 1

Code

o1.

Display

Select menu item

Select sensor type

Select meas. procedure

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit: Press conf, then enter.

Display Action

Code

o1.

Time interval of output filter Default setting: 0 sec (inactive). To specify a time interval: Select position using , edit number using . Press enter to proceed.

Choices

0 sec

(0 ... 120 sec)

Time averaging filter

To smoothen the current output, a low-pass filter with adjustable filter time can be switched on. When there is a jump at the input (100 %), the output level is at 63 % after the time interval has been reached. The time interval can be set from 0 to 120 sec. If the time interval is set to 0 sec, the current output follows the input.

Note:

The filter only acts on the current output, not on the display, the limit values, or the controller!

Time interval 0 to 120 sec

Conguration

Output 1 Output current during Error and HOLD

Menu group

Output 1

Code

o1.

Display

Select menu item

Select sensor type

Select meas. procedure

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit: Press conf, then enter.

Code

o1.

Display

Action

22 mA signal for error message Select using key Press enter to proceed.

Choices

OFF

(ON)

Output signal during HOLD LAST: During HOLD the last measured value is maintained at the output FIX: During HOLD a value (to be entered) is maintained at the output Select using key Press enter to proceed.

Only with FIX selected: Enter current which is to flow at the output during HOLD Select position using key and edit number using key. Press enter to proceed.

Output signal during HOLD

Output current [mA]

Output signal for HOLD FIX setting = 21.0 mA

HOLD active

LAST

(FIX)

21.0 mA

(00.0 ...

21.0 mA)

Output signal for HOLD LAST setting

HOLD active

Conguration

Output 2 Temperature unit and probe / Output current.

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select temp probe

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit: Press conf, then enter.

Code

o2.

Display

Action

Specify temperature unit Select using key key. Press enter to proceed.

Choices

°C

(°F)

Select temperature probe Select using key key. Press enter to proceed.

Set output current range Select using key key. Press enter to proceed.

Current start: Enter lower end of scale.

Select position using , edit number using , press enter to proceed.

Current end: Enter upper end of scale.

Select position using , edit number using , press enter to proceed.

Process temperature: Current start and current end

Example 1: Range 0 ... 100 °C Example 2: Range 50 ... 70 °C.

[°C]

Process

100

temperature

Output current

20 4

[mA]

Advantage: Higher resolution in

[°C]

range of interest

Process temperature

Output current

22NTC

(30NTC)

4 - 20 mA

0 - 20 mA

000.0 °C

100.0 °C

[mA]

20 4

Conguration

Output 2 Time averaging lter

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select temp probe

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit: Press conf, then enter.

Code

o2.

Display

Action

Time interval of output filter Default setting: 0 sec (inactive). To specify a time interval: Select position using , edit number using . Press enter to proceed.

Choices

0 sec

(0 ... 120 sec)

Time averaging filter

To smoothen the current output 2, a low-pass filter with adjustable filter time can be switched on. When there is a jump at the input (100 %), the output level is at 63 % after the time interval has been reached. The time interval can be set from 0 to 120 sec. If the time interval is set to 0 sec, the current output follows the input.

Note:

The filter only acts on the current output, not on the display, the limit values, or the controller!

Time interval 0 to 120 sec

Conguration

Output 2 Temperature error / Output current during HOLD

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select temp probe

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit: Press conf, then enter.

Code

o2.

Display

Action

22 mA signal for error message Select using key. Press enter to proceed.

Choices

OFF

(ON)

Only with FIX selected: Enter current which is to flow at the output during HOLD. Select position using key and edit number using key. Press enter to proceed.

Output signal during HOLD:

Output current [mA]

Output signal for HOLD Setting FIX = 21.0 mA

HOLD active

LAST

(FIX)

21.0 mA

(00.0 ...

21.0 mA)

Output signal for HOLD LAST setting

HOLD active

Conguration

Correction Polarization voltage / Process pressure / Salinity correction

Menu group

Correction

Code

CO.

Display

Select menu item

Polarization voltage

Meas. unit (pressure)

Process pressure

Salinity correction

Exit: Press conf, then enter.

Code Display

Co.

Action

Enter polarization voltage Select using , edit number using , press enter to proceed.

Choices

0675 mV

Select pressure unit Select using arrow key Press enter to proceed.

Process pressure correction Enter process pressure. This value is used to correct oxygen saturation. It has no influence on concentration measurement (Conc). Select position using key and edit number using key. Press enter to proceed.

Enter salinity correction Select position using and edit number using . Press enter to proceed.

* ppt (parts per thousand) - corresponds to g/kg

bar

(kPa, PSi)

1.013 bar

00.00 ppt*

Conguration

Calibration mode Alarm settings

Menu group

Calibration mode

Alarm settings

Alarm

Code

CA.

Display

Select menu item

Calibration mode

Cal timer interval

Exit: Press conf, then enter.

AL.

Select Sensocheck

Delay

LED in HOLD mode

Exit: Press conf, then enter.

Alarm contact

The alarm contact is closed during normal operation (N/C). It opens in the case of alarm or power outage.

As a result, a failure message is provided even in the case of line breakage (fail-safe behavior). For contact ratings, see Specifications.

Error messages can also be signaled by a 22 mA output current (see Pg 39,

The operating behavior of the alarm contact is shown on Pg 84.

The alarm delay acts on the LED, the 22 mA signal, and the alarm contact.

45,

83).

Code

CA.

Display

Action

Specify calibration mode (Calibration to saturation or concentration) Select using , press

enter to proceed.

Choices

SAt

(Conc)

AL.

Cal timer interval The cal timer reminds you to calibrate in time. Select position using , edit number using , press

enter to proceed.

Select Sensocheck (continuous monitoring of sensor) Select using , press

enter to proceed.

Alarm delay

Select position using , edit number using , press

LED in Hold mode Select position using , edit number using , press

LED status: Setting

OFF

enter to proceed.

Alarm HOLD

on blinks

blinks off

0000 h

(0 ... 9999 h)

ON/

OFF

0010 sec

(xxxx sec)

ON/

OFF

Conguration

Limit Function Relay 1

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

Use of relays

Contact function

L1.

Contact response

Enter setpoint

Enter hysteresis

Delay

L2.

Relay 2 menu group Controller menu group

Ct.

Exit: Press conf, then enter.

Code

rL.

Display

Action

Use of relays:

• Limit function (LiMIT)

• Controller (CtROL)

Select using , press

enter to proceed.

Note: Selecting CtROL leads to

Controller menu group Ct.

Choices

LiMIT

(CtROL)

L1.

For limit 1 function principle, see Fig. on Pg. 53. Select using , press

enter to proceed.

Limit 1 contact response N/C: normally closed contact N/O: normally open contact Select using Press enter to proceed

Limit 1 setpoint Select using , edit number using

, press

Limit 1 hysteresis Select using , edit number using

, press

Limit 1 delay The contact is activated with delay (deactivated without delay) Select position using , edit number using , press

.

enter to proceed.

(Hi)

N/C

(N/O)

0000 %

(

xxxx %)

0001 %

(

xxxx %)

0010 sec

(

0 ... 600 sec)

Conguration

Limit function Relay 2

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

Use of relays

Relay 1 menu group

L1.

Contact function

L2.

Contact response

Enter setpoint

Enter hysteresis

Delay

Controller menu group

Ct.

Exit: Press conf, then enter.

Code

Display Action

Choices

L2.

Limit Lo

Hysteresis +

Setpoint

Contact

For limit 2 function principle, see Fig. below. Select using , press

enter to proceed.

Limit 2 contact response N/C: normally closed contact

(Lo)

N/C

(N/O)

N/O: normally open contact Select using , press

enter to

proceed.

Limit 2 setpoint Select using , edit number using

, press

enter to proceed.

Limit 2 hysteresis Select using , edit number using

, press

enter to proceed.

Limit 2 delay The contact is activated with delay

0500 %

(

xxxx %)

0001 %

(

xxxx %)

0010 sec

(

0 ... 600 sec)

(deactivated without delay) Select position using , edit number using , press

enter to proceed.

Signal

Limit Hi

Setpoint

Hysteresis -

Contact

Signal

Conguration

Controller (for description see page 78) Setpoint / Neutral zone

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

Use of relays

Relay 1 menu group

L1.

Relay 2 menu group

L2.

Ct.

Controller setpoint

Enter neutral zone

(P) Controller gain

(I) Reset time TR

(D) Rate time TD

Controller type PLC / PFC

PLC: Pulse length

PFC: Pulse frequency

HOLD response

Exit: Press conf, then enter.

Code Display

Ct.

Action Choices

Setpoint

Select using , edit number using

, press

enter to proceed.

Neutral zone (dead band)

Select using , edit number using

, press

enter to proceed.

Controller: P action

Select using , edit number using

, press

enter to proceed.

0100 %

(xxxx %)

0010 %

(xxxx %)

0100 %

(xxxx %)

Controller: I action (reset time)

Select using , edit number using , press

Controller: D action (rate time)

Select using , edit number using , press

Pulse length / Pulse frequency Select using , press

enter to proceed.

PLC: Pulse length

Select using , edit number using

, press

PFC: Pulse frequency

Select using , edit number using

, press

Behavior during HOLD

Select using , press

enter to proceed.

0000 sec

(0 ... 9999 sec)

0000 sec

(0 ... 9999 sec)

PLC

(PFC)

0010 sec

(0 ... 600 sec)

0060/min

(0 ... 180 /min)

Y Last

(Y Off)

Configuration

Controlling a rinsing probe or Signaling parameter set 1/2

Menu group

Contact: CLEAN / PSet2

Display

Code

Cn.

rinse

Code

Cn.

Display

Select menu item

Select CLEAN / PSet2

Rinsing interval

Rinse time

Contact response

Action (rinsing probe)

Function selection*:

• Control of rinsing probe (rinse)

Signaling active parameter set 2

•

Select using , proceed.

Rinsing interval * Select using , edit number

, press enter to proceed.

using

Rinse duration * Select using , edit number

, press enter to proceed.

using

Select contact response* N/O: normally open contact N/C: normally closed contact Select using , proceed

*) These parameters are only edited in parameter set 1. They are valid for

both parameter sets.

press enter to

Choices

rinse

(rinse / PSet2)

For

PSet2 see next page

000.0 h

(xxx.x h)

0060 sec (xxxx sec)

N/O

(

N/O

N/C)

Controlling a rinsing probe

The “Clean” contact can be used to connect a simple rinsing probe. Rinse duration and rinsing interval are defined during configuration. Contact response can be set as N/O or N/C.

e.g. spray cleaning

Clean

Signaling parameter set 1/2

Depending on the selected parameter set, the relay is active or inactive. The signal can be used for superordinated process control systems. Parameter set 2 is indicated by “88” in the upper left corner of the display.

Clean PSet2

si794

Parameter set 1 selected

Parameter set 2 selected

Power supply

Process control system

Power supply: AC< 250 V / < 3 A / < 750 VA DC< 30 V / < 3 A / < 90 W

Selecting parameter set 1/2

Manually or via a signal at the Control input

Display

After correct input a welcome text (CONF) is displayed for approx. 3 sec

Action Choices

To select a parameter set, press conf, enter code: 7654 Select position using , edit number using ,

Wrong settings change the measurement properties! If an invalid code is entered, the transmitter returns to measuring mode.

press enter to proceed.

Select:

• Parameter set 1 (MAN)

• Parameter set 2 (MAN)

• Automatic switchover via

control input (Ctr-EXT)

Select using ,

With -1- or -2- selected: Since the complete device configuration is changed in one step, there is a

security prompt (No/Yes).

Note:

When pressing enter directly, the selection is not stored. Activation of parameter set 2 is indicated by “88” in the upper left corner of the display.

press enter to proceed.

-1-

(-1- MAN

-2-MAN Ctr-EXT)

For Ctr-EXT, see next page

Display

Action Choices

With Control input

You can switch between the parameter

sets by applying an external signal to the Control input (see below).

Ctr-EXT selected:

External switchover of parameter sets

The parameter set can be selected from outside by sending a signal to the Control input (e.g. from the process control system). To do so, Ctr-EXT is set during configuration.

Power supply

Control

12...24 V AC/DC

input

si794

Note:

Parameter set 2 is indicated by “88” in the upper left corner of the display.

Process control system

0 ... 2 V AC/DC Parameter set 1 selected

10 ... 30 V AC/DC Parameter set 2 selected

Default settings of parameter sets

Two complete parameter sets are stored in the EEPROM. As delivered, the two sets are identical but can be edited.

Note:

Fill in your configuration data on the following pages.

Code. Parameter Default setting

o1. Sensor type A o1. %, mg/L, ppm % o1. 0/4-20 mA 4-20 mA o1. Current start 0000 % o1. Current end 0500 % o1. Filter time 0 sec o1. 22mA signal OFF o1. HOLD response Last o1. Fix current 021.0 mA o2. Unit °C / °F °C o2. Temp probe 22 NTC o2. 0/4 ...20mA 4-20 mA o2. Current start 000.0 °C o2. Current end 100.0 °C o2. Filter time 0 sec o2. 22mA signal OFF o2. HOLD response Last o2. Fix current 021.0 mA Co. Polariz. voltage 675 mV Co. Pressure unit bar Co. Pressure 1.013 bar Co. Salinity 00.00 mg/L CA. Cal mode Sat CA. Cal interval 0000 h AL. Sensocheck OFF AL. Alarm delay 0010 sec AL. LED Hold OFF

Code. Parameter Default setting

rL. Relay function Limit L1. Contact function Lo L1. Contact response N/C L1. Setpoint 0000 % L1. Hysteresis 0001 % L1. Delay 0010 sec L2. Contact function Hi L2. Contact response N/C L2. Setpoint 0500 % L2. Hysteresis 0001 % L2. Delay 0010 sec Ct. Setpoint 0100 % Ct. Neutral zone 0010 % Ct. P action 0100 % Ct. I action 0000 sec Ct. D action 0000 sec Ct. PLC/PFC controller PLC Ct. Pulse length 0010 sec Ct. Pulse frequency 0060 /min Ct. Hold response Last

Cn. Rinse/Par.set 2 rinse Cn. Rinsing interval 000.0 h Cn. Rinse time 0060 sec Cn. Contact type N/C

Parameter set - individual settings

Code. Parameter Setting

o1. Sensor type ____________ ____________ o1. %, mg/L, ppm ____________ ____________ o1. 0/4-20 mA ____________ ____________ o1. Current start ____________ ____________ o1. Current end ____________ ____________ o1. Filter time ____________ ____________ o1. 22mA signal ____________ ____________ o1. HOLD response ____________ ____________ o1. Fix current ____________ ____________

o2. Unit °C / °F ____________ ____________ o2. Temp probe ____________ ____________ o2. 0/4 ...20mA ____________ ____________ o2. Current start ____________ ____________ o2. Current end ____________ ____________ o2. Filter time ____________ ____________ o2. 22mA signal ____________ ____________ o2. HOLD response ____________ ____________ o2. Fix current ____________ ____________

Co. Polarization voltage ____________ ____________ Co. Pressure unit ____________ ____________ Co. Pressure ____________ ____________ Co. Salinity ____________ ____________

CA. Cal mode ____________ ____________ CA. Cal interval ____________ ____________

AL. Sensocheck ____________ ____________ AL. Alarm delay ____________ ____________ AL. LED Hold ____________ ____________

Code. Parameter Setting

rL. Relay function ____________ ____________

L1. Contact function ____________ ____________ L1. Contact response ____________ ____________ L1. Setpoint ____________ ____________ L1. Hysteresis ____________ ____________ L1. Delay ____________ ____________

L2. Contact function ____________ ____________ L2. Contact response ____________ ____________ L2. Setpoint ____________ ____________ L2. Hysteresis ____________ ____________ L2. Delay ____________ ____________

Ct. Setpoint ____________ ____________ Ct. Neutral zone ____________ ____________ Ct. P action ____________ ____________ Ct. I action ____________ ____________ Ct. D action ____________ ____________ Ct. PLC/PFC controller ____________ ____________ Ct. Pulse length ____________ ____________ Ct. Pulse frequency ____________ ____________ Ct. Hold response ____________ ____________

Cn. Rinse /Par.set2 ____________ ____________ Cn. Rinsing interval ____________ ____________ Cn. Rinse duration ____________ ____________ Cn. Contact type ____________ ____________

Calibration

Calibration adjusts the transmitter to the sensor.

Activation Activate with cal

Enter passcode. Edit parameter using  and , conrm/proceed using enter. (To exit, press cal, then enter.)

HOLD

During calibration the transmitter remains in the Hold mode.

Input errors

End

HOLD icon

During calibration the transmitter remains in the Hold mode for reasons of safety. Output current is frozen (last value or preset xed value, depending on conguration), limit and alarm contacts are inactive. The controller is in the congured state, Sensoface is o, “Calibration” mode indicator is on. The red LED blinks when “HOLD ON” has been set.

The calibration parameters are checked during the input. In the case of an incorrect input “Err” is displayed for approx. 3 sec. The incorrect parameters cannot be saved. Input must be repeated.

End with cal. The measured value is shown in the main display alternately with “Hold”, “enter” blinks, Sensoface is active. Press enter key to end the Hold mode. The measured value is displayed. The output current remains frozen for another 20 sec (HOLD icon on, “hourglass” blinks).

Calibration

It is always recommended to calibrate in air. Compared to water, air is a calibration medium which is easy to handle, stable, and thus safe. In the most cases, however, the sensor must be dismounted for a calibration in air. When dealing with biotechnological processes which require sterile conditions, the sensor cannot be removed for calibration. Here, calibration must be performed with aeration directly in the process medium (e.g. after sterilization). In the field of biotechnology, for example, often saturation is measured and calibration is performed in the process medium for reasons of sterility. For other applications where concentration is measured (water control etc.), calibration in air has proved to be useful.

Common combination: process variable / calibration mode

Measurement Calibration Saturation Water Concentration Air

The calibration procedures for these two common applications are described on the following pages. Of course, other combinations of process variable and calibration mode are possible.

Note:

When a 2-point calibration is required, the zero calibration should be performed prior to saturation or concentration calibration, resp. All calibration procedures must only be performed by trained personnel.

Calibration to percent saturation (SAT)

Display

Action

Select calibration (Press cal.) Enter passcode: 1100 Select position using , edit number using press

enter to proceed.

Place sensor in calibration medium Start with enter

Enter relative humidity Select position using , edit number using , press

enter to proceed.

Enter calibration pressure Select position using , edit number using , press to proceed.

Automatic drift check Display of sensor current (related to 25 °C and 1013 mbars) and measuring temperature.

The drift check might take some time.

enter

Remark

SAT or Conc calibration is selected during configuration.

If an invalid code is entered, the transmitter returns to measuring mode.

The transmitter is in Hold mode

Default for relative humidity in aqueous media: rH = 100 % (in air approx. 50 %)

Default for calibration pressure is the process pressure configured

Drift check can be stopped after > 10 sec by pressing cal (accuracy reduced).

Display Action

Enter setpoint value for saturation Select position using , edit number using , press

Remark

Default: last value entered

enter to proceed.

Display of new slope and zero point (related to 25 °C at 1013 mbars) Press enter to end calibration.

Place sensor in process. The percent saturation is shown in the main display alternately with “Hold”; “enter“ blinks. Press enter to exit calibration.

New calibration: Press cal key.

After end of calibration, the outputs remain in Hold mode for approx. 20 sec.

Information on saturation calibration (SAT)

• The calibration medium must be in equilibrium with air (percent saturation for

water is 100 %). Oxygen exchange between water and air is very slow. To speed up the adjustment processes, make sure that there is a steady medium flow during calibration.

• If the percent saturation is known from a simultaneous measurement, it can be

entered manually.

• For 2-point calibration, perform zero calibration first.

Calibration to concentration (Conc)

Display

Action

Select calibration (Press cal.) Enter passcode: 1100 (Select position using edit number using press enter to confirm.)

Place sensor in air Start with enter

Enter relative humidity (Select position using edit number using press enter to confirm.)

Enter calibration pressure (Select position using edit number using press enter to confirm.)

Automatic drift check Display of input current (related to 25 °C and 1013 mbars) and measuring temperature.

The drift check might take some time.

Remark

SAT or Conc calibration is selected during configuration.

If an invalid code is entered, the transmitter returns to measuring mode.

The transmitter goes to HOLD mode.

Default for relative humidity in air: rH = 50 %

Default for calibration pressure is normal pressure

1.013 bars.

Drift check can be stopped after > 10 sec by pressing cal (accuracy reduced).

Display

Action

Enter default for concentration (Select position using edit number using press enter to confirm.)

Remark

The default value is calculated from rel. humidity, cal pressure, and cal temperature. (the unit of measurement, ppm or mg/L, ... , is preset during configuration.)

Display of new slope and zero point (related to 25 °C at 1013 mbars). Press enter to end concentration calibration.

Place sensor in process The new value is shown in the main display alternately with “Hold”; “enter” blinks. Press enter to exit calibration.

New calibration: Press cal key.

After end of calibration, the outputs remain in Hold mode for approx. 20 sec.

Information on concentration calibration (Conc)

Calibration in air. This calibration method is recommended when the sensor can be removed for calibration. Air has a stable oxygen content. Therefore the adjustment processes during calibration run more quickly.

For 2-point calibration, perform zero calibration first.

Zero calibration

The sensors have a very low zero current. Therefore, a zero calibration is only recommended for measurement of oxygen traces. If a zero calibration is performed, the DO sensor should remain for at least 10 to 30 minutes in the calibration medium in order to obtain stable, non-drifting values. During zero calibration, a drift check is not performed. Zero current of a properly functioning sensor is notably less than

0.5 % of air current. The display (bottom: measured value, top: entered value) does not change until an input current is entered for the zero point. When measuring in an oxygen-free medium, the displayed current can be taken directly.

Display

Zero

Action

Select calibration (Press cal key). Enter passcode: 1001

Select position using , edit number using , press

enter to proceed.

Place sensor in oxygen-free medium

Main display: Zero current Press enter to save the value or correct it using the arrow keys and then save by pressing enter. Secondary display: Sensor current measured

Remark

The transmitter is in the Hold mode. If an invalid code is entered, the transmitter returns to measuring mode.

Display of slope Display of new zero current. Press

enter

place sensor in the process

The oxygen value is shown in the main display alternately with “Hold”, “enter” blinks. Press enter to stop Hold.

to end calibration,

New calibration: Press cal key.

After end of calibration, the outputs remain in Hold mode for approx. 20 sec.

Product calibration

Calibration by sampling

During product calibration the sensor remains in the process. The measurement process is only interrupted briefly.

Procedure: During sampling the currently measured value is saved in the transmitter. The transmitter immediately returns to measuring mode. The calibration mode indicator blinks and reminds you that calibration has not been terminated. The comparison value is measured on the site, e.g. using a portable DO meter in a bypass. This value is then entered in the transmitter. The new value for slope or zero is calculated from the stored value and the comparison value. From the measured value, the transmitter automatically recognizes whether a new slope or zero must be calculated (above approx. 5 % saturation: slope, below: zero). If the sample is invalid, you can take over the measured value saved during sampling instead of the comparison value. In that case the old calibration values remain stored. Afterwards, you can start a new product calibration. The following describes a product calibration with slope correction – a product calibration with zero correction is performed correspondingly.

Display

Action

Product calibration step 1: Select calibration (Press cal key). Enter passcode: 1105 (Select position using edit number using , press enter to confirm.)

Save value. Press enter to proceed.

Remark

The type of product calibration (SAT or Conc) is selected during configuration (mea-

surement procedure). If an invalid code is entered, the transmitter returns to measuring mode.

Now the reference value must be determined. The transmitter goes to measuring mode.

Display

Action

Remark

Measuring mode

Product calibration step 2: When a reference value has been determined, open the product calibration once more (cal key, passcode 1105).

Enter the comparison value. Press enter to confirm.

Display of new slope and zero (related to 25 °C and 1013 mbars) Press enter to end calibration.

The measured value is shown in the main display alternately with “Hold”. “enter” blinks. Press enter to exit calibration.

From the blinking CAL mode indicator you see that product calibration has not been terminated.

Display (approx. 3 sec)

Calculation of new slope.

New calibration: Press cal key.

After end of calibration, the outputs remain in Hold mode for approx. 20 sec.

Temp Probe Adjustment

Display

Action Remark

Select calibration (Press cal key). Enter passcode: 1015 Select position using , edit number using , press

Measurement

Display

Remark

In the measuring mode the main display shows the configured process variable (%, mg/L, or ppm) and the lower display the temperature. During calibration you can return to measuring mode by pressing the cal key, during configuration by pressing the conf key. (Waiting time for signal stabilization approx. 20 sec).

enter to proceed.

Ready for calibration

Measure the temperature of the process medium using an external thermometer. Enter the measured value: Select position using , edit number using , press enter to proceed. Press enter to end adjustment. HOLD will be deactivated after 20 sec.

Wrong settings change the measurement properties! If an invalid code is entered, the transmitter returns to measuring mode.

The transmitter is in the Hold mode (display for approx. 3 sec)

Default: Current value of secondary display

Diagnostics functions

Display

Remark

Display of output currents

Press enter while in measuring mode. The current at output 1 is shown in the main display, the current at output 2 in the secondary display. After 5 sec the transmitter returns to measuring mode.

Display of calibration data (Cal Info)

Press cal while in measuring mode and enter code:

0000. The slope is shown in the main display, the zero current in the secondary display. After 20 sec the transmitter returns to measuring mode (immediate return at pressing enter).

Display of sensor current (sensor monitor)

Press conf while in measuring mode and enter code:

2222. The (uncompensated) sensor current is shown in the main display, the measuring temperature in the secondary display. Press enter to return to measurement.

Display of last error message (Error Info)

Press conf while in measuring mode and enter code:

0000. The last error message is displayed for approx. 20 sec. After that the message will be deleted (immediate return to measurement at pressing enter).

Diagnostics functions

These functions are used for testing the connected peripherals.

Display

Select a relay

Test 0/1 Return to

measurement

Action / Remarks

Specify current at output 1

• Press conf, enter code 5555 The current indicated in the main display for output 1 can be edited. Select position using , edit number using , press

enter to confirm. Then the entered value will be shown in the secondary display. The transmitter is in Hold mode. Press conf, then enter to return to measurement (Hold remains active for another 20 sec).

Specify current at output 2

• Press conf, enter code 5556 The current indicated in the main display for output 2 can be edited. Select position using , edit number using ,

enter to confirm. Then the entered value will

press be shown in the secondary display. The transmitter is in Hold mode. Press conf, then enter to return to measurement (Hold remains active for another 20 sec).

Relay test (manual test of contacts)

• Press conf, enter code 5557 The relays are frozen. This state is indicated in the display. The 4 digits in the display correspond to the 4 relays (as located on the terminal plate):

1. digit: R1

2. digit: R2

3. digit: AL

4. digit: CLN Function test using arrow keys – see left column. When exiting the function (enter), the relays are set corresponding to the measured value.

Display

Controller characteristic

The arrows indicate which relay (valve) is active:

+100 %

Controller output

Setpoint

-100 %

Relay 2 active (Meas. value > setpoint)

Relay 1 active (Meas. value < setpoint)

Action / Remarks

Controller test (manual specification of controller output)

• Press conf, enter code: 5559 After function activation “Ctrl” is displayed for approx. 3 sec. With the controller turned off, “OFF” is displayed in addition, then return to measuring mode. The function is used to start up control loops or check the actuators. For bumpless changeover to automatic operation (exiting this function), configure an I-action component (reset time).

Specify value: Select usingkey, edit number usingkey. Press

enter to proceed.

The transmitter is in Hold mode. Press enter to return to measurement (Hold remains active for another 20 sec).

Controller output -100 to 0 %: Relay 2 active

Controller output 0 to +100 %: Relay 1 active

Momentary controller output (adjusted value has not been saved yet)

Controller functions

PID controller

P controller

Application in integrating systems (e.g. closed tank, batch processes).

PI controller

Application in non-integrating systems (e.g. aeration basin).

PID controller

The additional derivative action compensates for measurement peaks.

Controller characteristic

Proportional

action Y

Relay 1

Setpoint

+100

[%]

Neutral zone Yp=0

-100

Relay 2

Note:

In Hold mode the controller output acts as configured

(Y = const. or Y = 0).

Controller equations

Controller output Y = YP + YPdt + T

P action

Proportional action Y

Setpoint - Meas. value

YP =

Constant

I action

with:

Constant 50 % (for % O

5.00 mg/L (for mg/L)

5.00 ppm (for ppm)

Neutral zone (Y=0)

Tolerated deviation from desired value. Example: With the setting “010 %”, a deviation of ± 5 % does not activate the controller.

Proportional action (Gradient KC [%])

D action

Proportional action Reset time [s] Rate time [s] Controller gain [%]

or % Air)

100 %

Controller

50 %

output Y

KC = 500 %

10 / (1.00) 20 / (2.00)

Deviation

KC = 200 %

KC = 100 %

KC = 50 %

30 / (3.00)

40 / (4.00)

50 / (5.00)

Process variables: % / (mg/L, ppm)

Controller functions

Pulse length / pulse frequency controller

Pulse length controller (PLC)

The pulse length controller is used to operate a valve as an actuator. It switches the contact on for a time that depends on the controller output. The period is constant. A minimum ON time of

0.5 sec is maintained even if the controller output takes corresponding values.

Output signal (relay contact) of pulse length controller

0 1

ON time (Y = 20 %)

ON time (Y = 80 %)

Pulse length

Pulse frequency controller (PFC)

The pulse frequency controller is used to operate a frequencycontrolled actuator (metering pump). It varies the frequency with which the contacts are switched on. The maximum pulse frequency [pulses/min] can be defined. It depends on the actuator. The contact ON time is constant. It is automatically calculated from the user-defined maximum pulse frequency.

Output signal (relay contact) of pulse frequency controller

ON time

Pulse frequency (Y = 20%)

Pulse frequency (Y = 80%)

Error messages

(error codes)

Error Display

ERR 01

ERR 02

ERR 98

ERR 99

Measured value blinks

“ConF” blinks

“FAIL” blinks

Problem Possible causes

SAT range

Sensor defective Wrong sensor connected Measuring range exceeded

Conc range

Sensor defective Wrong sensor connected Measuring range exceeded

System error

Configuration or calibration data defective; completely reconfigure and recalibrate the transmitter. Memory error in device program (PROM defective)

Factory settings

EEPROM or RAM defective This error message only occurs in the case of a total defect. The transmitter must be repaired and recalibrated at the factory.

Out 1 (22 mA)

Red LED

Alarm contact

Out 2 (22 mA)

Error

ERR 03

ERR 11

ERR 12

ERR 13

ERR 21

ERR 22

ERR 23

ERR 41

ERR 33

Icon (blinks)

Problem Possible causes

Temperature probe

Open or short circuit

Temperature range exceeded

Current output 1

Current below 0 (3.8) mA

Current output 1

Current above 20.5 mA

Current output 1

Current span too small / too large

Current output 2

Current below 0 (3.8) mA

Current output 2

Current above 20.5 mA

Current output 2

Current span too small / too large

Rinsing probe

Communication error

Sensocheck

Sensor: connecting cable defective

• Zero error, Sensoface active, see Pg 86

• Slope error, Sensoface active, see Pg 86

out 1 (22 mA)

Red LED

Alarm contact

Out 2 (22 mA)

• Response time exceeded, Sensoface active, see Pg 86

• Cal interval expired, Sensoface active, see Pg 86

Calibration error messages

Icon blinks:

Problem Possible causes

Slope out of range

Wrong calibration values specified (relative humidity, pressure, saturation, concentration)

Calibration aborted after 12 minutes

Sensor defective or dirty

In addition “CAL Err” flashes.

• No electrolyte in the sensor

• Sensor cable insufficiently shielded or defective

• Strong electric fields influence the measurement

• Temperature fluctuation of calibration solution

Operating states

Operating status

Measuring

Cal Info (cal) 0000

Error Info (conf) 0000

Calibration (cal) 1100

Temp adjustment (cal) 1015

Out 1

Out 2

Rel.1/2

Controller

Rel.1/2

Limit value

Cleaning

contact

Alarm contact

LED

Timeout

20 s

Operating status

Product cal 1 (cal) 1105

Product cal 2 (cal) 1105

Configuration (conf) 1200

Parameter set 1/2 (conf) 7654

Sensor monitor (conf) 2222

Current source 1 (conf) 5555

Current source 2 (conf) 5556

Relay test (conf) 5557

Manual controller (conf) 5559

Rinse function

HOLD input

Out 1

Out 2

Rel.1/2

Controller

Rel.1/2

Limit value

Cleaning

contact

Alarm contact

LED

Timeout

20 min

Explanation:

Active

as configured (Last/Fix or Last/Off)

Sensoface

(Sensocheck must have been activated during configuration.)

The little smiley in the display (Sensoface) alerts to sensor problems (defective cable, maintenance required). The permitted calibration ranges and the conditions for a friendly, neutral, or sad Sensoface are summarized in the following table. Additional icons refer to the error cause. Replace membrane module or filling solution, if required.

Type A sensors (Hamilton Oxyferm, Oxysens)

Slope

Range

25 .... 130 nA -2 ... +2 nA max. 720 sec

> 35 ... < 90 nA > - 0.3 ... < 0.3 nA ≤ 300 s ≤ 80 %

30 ... 35 nA or 90 ... 110 nA

< 30 nA or > 110 nA

Zero point

- 0.6 ... -0.3 nA or +0.3 ... +0.6 nA

< - 0.6 nA or > 0.6 nA

Response time

300 ... 600 s 80 ... ≤ 100 %

> 600 sec Timer expired

Cal timer

Note

The worsening of a Sensoface criterion leads to the devaluation of the Sensoface indicator (Smiley becomes “sad”). An improvement of the Sensoface indicator can only take place after calibration or removal of the sensor defect.

Type B sensor (Hamilton Oxygold)

Slope

Range 200 ... 550 nA -2 ... +2 nA max. 720 sec

Zero point

Response time

Cal timer

> 250 ... < 500 nA

225 ... 250 nA or 500 ... 525 nA

< 225 nA or > 525 nA

Thermometer and Sensoface: Temperature out of concentration or saturation range

> - 0.5 ... < 0.5 nA < 300 s < 80 %

-1.0 ... -0.5 nA or +0.5 ... +1.0 nA

< -1.0 nA or > +1.0 nA

300 ... 600 s 80 ... ≤ 100 %

> 600 sec Timer expired

Sensocheck

Continuously monitors the sensor and leads for short circuits or open circuits. Critical values make the Sensoface “sad” and the corresponding icon blinks:

The Sensocheck message is also output as error message Err 33. The alarm contact is active, the red LED is lit, output current 1 is set to 22 mA (when configured correspondingly). Sensocheck can be switched off during configuration (then Sensoface is also disabled). Exception: After a calibration a smiley is always displayed for confirmation.

Appendix

Product line and accessories

Devices Order No.

si794 D tr LXV509.99.00002

Mounting accessories

Pipe-mount kit LZY483 Panel mounting kit LZY484 Protective hood LZY485 Pillar incl. protective hood and pipe-mount kit LZY576

Spare parts

Installation kit, si792 / si794 LZY486 Rear housing, si792 / si794 LZY487

Specications

O2 input Type A sensor: Hamilton Oxyferm, Oxysens

Type B sensor: Hamilton Oxygold

Measuring current 0 ... 600 nA Resolution 10 pA Saturation (-10 ... 80 °C) 0... 120 % Measurement error

Concentration (-10 ... 80 °C) 0000 ... 9999 µg/L 0000 ... 9999 ppb

0.000 ... 9.999 mg/L

0.000 ... 9.999 ppm

0.00 ... 50.00 ppm

Measurement error Permissible guard current ≤ 20 µA Polarization voltage * 0 ... 1000 mV, resolution 3 mV Process pressure * 0 ... 9.999 bars ( ... 999.9 kPa / ... 145.0 PSI) Salinity correction * 00.00 ... 45.00 g/kg

Sensor standardization Operating modes * O O2 concentration (automatic) Product calibration Zero calibration

Calibration range Zero point ± 2 nA Sensor Type A Slope 25 ... 130 nA (at 25 °C, 1013 mbars) Calibration range Zero point ± 2 nA

Sensor Type B Slope 200 ... 550 nA

(at 25 °C, 1013 mbars) Calibration timer * 0000 ... 9999 h Pressure correction * 0.000 ... 9.999 bars / 999.9 kPa / 145.0 PSI

Sensocheck Monitoring for short circuits / open circuits (can be disabled)

Sensoface Provides information on the sensor condition

1,2,3

0.5 % meas.val. + 0.1 %

1,2,3

0.5 % meas.val. + 0.005 mg/L or 0.005 ppm

saturation (automatic)

evaluation of zero point/slope, response time, calibration interval, Sensocheck

Temperature input NTC 22 kohms / NTC 30 kohms*

2-wire connection, adjustable Measuring range -20.0 ... +150.0 °C / -4 ... +302 °F Adjustment range 10 K Resolution 0.1 °C / 1 °F Measurement error

1,2,3

< 0.5 K (<1 K at > 100°C)

HOLD input Galvanically separated (OPTO coupler) Function Switches transmitter to Hold mode Switching voltage Inactive 0 ... 2 V (AC/DC) Active 10 ... 30 V (AC/DC)

CONTROL input Galvanically separated (OPTO coupler) Function Control input for automatic cleaning system Switching voltage Inactive 0 ... 2 V (AC/DC) Active 10 ... 30 V (AC/DC)

Output 1 0/4 to 20 mA, max. 10 V, floating (galv. connected to output 2) Process variable * O2 saturation/O2 concentration Overrange * 22 mA in the case of error messages Output filter * Low-pass, filter time interval 0 ... 120 s Meas. error

< 0.3 % current value + 0.05 mA Start/end of scale Configurable within selected range Span allowed 5 ... 500 % / 0.5 ... 50 mg/L (ppm)

Output 2 0/4 to 20 mA, max. 10 V, floating (galv. connected to output 1) Measured variable Temperature Overrange * 22 mA in case of temp error messages Output filter * Low-pass, filter time interval 0 ... 120 s Measurement error 1

< 0.3 % current value + 0.05 mA Start/end of scale * -20 ... +150 °C / -4 ... +302 °F Span allowed 20 ... 170 K (68 ... 338 °F)

Specifications

Alarm contact Relay contact, floating

Contact rating AC < 250 V / < 3 A / < 750 VA DC < 30 V / < 3 A / < 90 W Contact response N/C (fail-safe type) Response delay * 0000 ... 0600 sec

Limit values Output via relay contacts R1, R2 Contacts R1, R2, floating but inter-connected Contact rating AC < 250 V / < 3 A / < 750 VA DC < 30 V / < 3 A / < 90 W Contact response * N/C or N/O Response delay * 0000 ... 9999 s Setpoints * Within selected range Hysteresis * 000.0 ... 050.0 % / 00.00 ... 05.00 mg/L (ppm)

PID process controller Output via relay contacts R1, R2 (Relay R1: below setpoint, Relay R2: above setpoint) Setpoint specification * 0 ... 500 % / 0.00 ... 50.00 mg/L (ppm)

Neutral zone * 000.0 ... 050.0 % / 00.00 ... 05.00 mg/L (ppm) P-action component * Controller gain Kp: 0010 ... 9999 % I-action component * Reset time Tr: 0000 ... 9999 s (0000 s = no integral action) D-action component * Rate time Td: 0000 ... 9999 s (0000 s = no derivative action) Controller type * Pulse length controller or pulse frequency controller Pulse period * 0001 ... 0600 s, min. ON time 0.5 s

Max. pulse frequency * 0001 ... 0180 min-1 (pulse frequency controller)

(pulse length controller)

Cleaning function * Relay contact, floating,

Contact ratings AC < 250 V / < 3 A / < 750 VA DC < 30 V / < 3 A / < 90 W Contact response * N/C or N/O Interval * 000.0 ... 999.9 h (000.0 h = cleaning function switched off) Rinse duration * 0000 ... 1999 s

Display LC display, 7-segment with icons Main display Character height 17 mm, unit symbols 10 mm Secondary display Character height 10 mm, unit symbols 7 mm Sensoface 3 status indicators (friendly, neutral, sad face) Mode indication 5 mode indicators "meas", "cal", "alarm", "cleaning", "config" 18 further icons for configuration and messages Alarm indication Red alarm LED in case of alarm or HOLD (user defined)

Keypad 5 keys

Service functions

Current source Current specifiable for output 1 and 2 (00.00 to 22.00 mA) Manual controller Controller output entered directly (start of control process) Device self-test Automatic memory test (RAM, FLASH, EEPROM) Display test Display of all segments Last Error Display of last error occurred Sensor monitor Display of direct, uncorrected sensor signal Relay test Manual control of the four switching contacts

Parameter sets Two selectable parameter sets for different applications

Data retention Parameters and calibration data > 10 years (EEPROM)

for controlling a simple rinsing system

Specifications

Protection against electric shock

Safe electrical isolation of all extra-low-voltage circuits

Power supply 24 (-15%) ... 230 V AC/DC (+10%); approx. 5 VA, 2.5 W AC: 45 ... 65 Hz; Overvoltage category II, Class II

Nominal operating conditions

Ambient temperature -20 ... +55 °C Transport/Storage temp -20 ... +70 °C Relative humidity 10 ... 95% not condensing Power supply 24 (-15%) ... 230 V AC/DC (+10%) Frequency for AC 45 ... 65 Hz

EMC EN 61326

Emitted interference Class B (residential area)

Class A for mains > 60 V DC Immunity to interference Industry

Enclosure Molded enclosure made of PBT (polybutylene terephtalate) Color Bluish gray RAL 7031 Assembly • Wall mounting

• Pipe mounting: Ø 40 ... 60 mm

• Panel mounting, cutout to DIN 43 700

Dimensions H 144 mm, W 144 mm, D 105 mm Ingress protection IP 65 / NEMA 4X Cable glands 3 knockouts for cable glands M20x1.5 2 knockouts for NPT 1/2" or rigid metallic conduit Weight Approx. 1 kg

* User-defined

1) To IEC 746 Part 1, at nominal operating conditions

2) ± 1 count

3) Plus sensor error

against mains by double insulation to EN 61010-1

30 ... 45 mm

Sealed against panel

Contact information

HACH LANGE GMBH

Willstätterstraße 11 D-40549 Düsseldorf Tel. +49 (0)2 11 52 88-320 Fax +49 (0)2 11 52 88-210 info@hach-lange.de www.hach-lange.de

DR. BRUNO LANGE AG

Juchstrasse 1 CH-8604 Hegnau Tel. +41(0)44 9 45 66 10 Fax +41(0)44 9 45 66 76 info@hach-lange.ch www.hach-lange.ch

HACH LANGE APS

Åkandevej 21

DK-2700 Brønshøj

Tel. +45 36 77 29 11 Fax +45 36 77 49 11 info@hach-lange.dk www.hach-lange.dk

HACH LANGE LDA

Av. do Forte nº8 Fracção M P-2790-072 Carnaxide Tel. +351 214 253 420 Fax +351 214 253 429 info@hach-lange.pt www.hach-lange.pt

HACH LANGE KFT.

Hegyalja út 7-13.

H-1016 Budapest

Tel. +36 (06)1 225 7783 Fax +36 (06)1 225 7784 info@hach-lange.hu www.hach-lange.hu

HACH LANGE D.O.O.

Fajfarjeva 15 SI-1230 Domžale Tel. +386 (0)59 051 000 Fax +386 (0)59 051 010 info@hach-lange.si www.hach-lange.si

HACH LANGE LTD

Pacific Way Salford

GB-Manchester, M50 1DL

Tel. +44 (0)161 872 14 87 Fax +44 (0)161 848 73 24 info@hach-lange.co.uk www.hach-lange.co.uk

HACH LANGE FRANCE S.A.S.

33, Rue du Ballon

F-93165 Noisy Le Grand Tél. +33 (0)1 48 15 68 70 Fax +33 (0)1 48 15 80 00 info@hach-lange.fr www.hach-lange.fr

HACH LANGE AB

Vinthundsvägen 159A SE-128 62 Sköndal Tel. +46 (0)8 7 98 05 00 Fax +46 (0)8 7 98 05 30 info@hach-lange.se www.hach-lange.se

HACH LANGE SP.ZO.O.

ul. Opolska 143 a PL-52-013 Wrocław Tel. +48 (0)71 342 10-83 Fax +48 (0)71 342 10-79 info@hach-lange.pl www.hach-lange.pl

HACH LANGE S.R.L.

Str. Leonida, nr. 13 Sector 2

RO-020555 Bucuresti

Tel. +40 (0) 21 201 92 43 Fax +40 (0) 21 201 92 43 info@hach-lange.ro www.hach-lange.ro

ΗΑCH LANGE E.Π.Ε.

Αυλίδος 27 GR-115 27 Αθήνα Τηλ. +30 210 7777038 Fax +30 210 7777976 info@hach-lange.gr www.hach-lange.gr

HACH LANGE LTD

Unit 1, Chestnut Road Western Industrial Estate IRL-Dublin 12 Tel. +353(0)1 46 02 5 22 Fax +353(0)1 4 50 93 37 info@hach-lange.ie www.hach-lange.ie

HACH LANGE

8, Kr. Sarafov str.

BG-1164 Sofia

Tel. +359 (0)2 963 44 54 Fax +359 (0)2 866 04 47 info@hach-lange.bg www.hach-lange.bg

HACH LANGE S.L.U.

Edif. Arteaga Centrum C/Larrauri, 1C- 2ª Pl. E-48160 Derio/Vizcaya Tel. +34 94 657 33 88 Fax +34 94 657 33 97 info@hach-lange.es www.hach-lange.es

HACH LANGE SA

Motstraat 54

B-2800 Mechelen

Tél. +32 (0)15 42 35 00 Fax +32 (0)15 41 61 20 info@hach-lange.be www.hach-lange.be

HACH LANGE S.R.L.

Via Riccione, 14 I-20156 Milano Tel. +39 02 39 23 14-1 Fax +39 02 39 23 14-39 info@hach-lange.it www.hach-lange.it

HACH LANGE S.R.O.

Lešanská 2a/1176 CZ-141 00 Praha 4 Tel. +420 272 12 45 45 Fax +420 272 12 45 46 info@hach-lange.cz www.hach-lange.cz

HACH LANGE E.P.E.

27, Avlidos str GR-115 27 Athens Tel. +30 210 7777038 Fax +30 210 7777976 info@hach-lange.gr www.hach-lange.gr

HACH LANGE GMBH

Hütteldorferstr. 299/ Top 6 A-1140 Wien Tel. +43 (0)19 12 16 92 Fax +43 (0)19 12 16 92-99 info@hach-lange.at www.hach-lange.at

DR. LANGE NEDERLAND B.V.

Laan van Westroijen 2a NL-4003 AZ Tiel Tel. +31(0)344 63 11 30 Fax +31(0)344 63 11 50 info@hach-lange.nl www.hach-lange.nl

HACH LANGE S.R.O. Rolnícka 21

SK-831 07 Bratislava –

Vajnory Tel. +421 (0)2 4820 9091 Fax +421 (0)2 4820 9093 info@hach-lange.sk www.hach-lange.sk

HACH LANGE SU ANALİZ SİSTEMLERİ LTD.ŞTİ.

Hilal Mah. 75. Sokak Arman Plaza No: 9/A TR-06550 Çankaya/ ANKARA Tel. +90 (0)312 440 98 98 Fax +90 (0)312 442 11 01 bilgi@hach-lange.com.tr www.hach-lange.com.tr

Limited warranty

Hach Company warrants its products to the original purchaser against any defects that are due to faulty material or workmanship for a period of two years from date of shipment unless otherwise noted in the product manual. In the event that a defect is discovered during the warranty period, Hach Company agrees that, at its option, it will repair or replace the defective product or refund the purchase price excluding original shipping and handling charges. Any product repaired or replaced under this warranty will be warranted only for the remainder of the original product warranty period. This warranty does not apply to consumable products such as chemical reagents; or consumable components of a product, such as, but not limited to, lamps and tubing. Contact Hach Company or your distributor to initiate warranty support. Products may not be returned without authorization from Hach Company.

Limitations

This warranty does not cover:

• Damage caused by acts of God, natural disaster, labor unrest,

acts of war (declared or undeclared), terrorism, civil strife or acts of any governmental jurisdiction

• Damage caused by misuse, neglect, accident or improper

application or installation

• Damage caused by any repair or attempted repair not authorized

by Hach Company

• Any product not used in accordance with the instructions

furnished by Hach Company

• Freight charges to return merchandise to Hach Company

• Freight charges on expedited or express shipment of warranted

parts or product

• Travel fees associated with on-site warranty repair

This warranty contains the sole express warranty made by Hach Company in connection with its products. All implied warranties, including without limitation, the warranties of merchantability and tness for a particular purpose, are expressly disclaimed. Some states within the United States do not allow the disclaimer of implied warranties and if this is true in your state the above limitation may not apply to you. This warranty gives you specic rights, and you may also have other rights that vary from state to state. This warranty constitutes the nal, complete, and exclusive statement of warranty terms and no person is authorized to make any other warranties or representations on behalf of Hach Company.

Limitation of remedies

The remedies of repair, replacement or refund of purchase price as stated above are the exclusive remedies for the breach of this warranty. On the basis of strict liability or under any other legal theory, in no event shall Hach Company be liable for any incidental or consequential damages of any kind for breach of warranty or negligence.

Index

22 mA in the case of error 38 88, display icon 59

Access codes 108 Accessories 89 Alarm 27 Alarm contact 48 Alarm delay 48 Alarm settings 48 Assembly 12

Bracket kit (LZY483) 14

Cal Info 75 Calibration 64 Calibration error messages 84 Calibration mode 48 Calibration to concentration (Conc) 68 Calibration to percent saturation (SAT) 66 Calibration with sampling 72 “Clean” contact 57 Complaints 47 Complaints 98 Conguration 28

100

Hach-Lange SI794 D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of contents

Intended use

Safety information

Overview of si794 D tr

Assembly

Installation and connection

Terminal assignments

Wiring example

Protective wiring of relay outputs

Interface and navigation

Operation: Keypad

Safety features

Hold mode

Configuration

Default settings of parameter sets

Calibration

Measurement

Diagnostics functions

Controller functions

Error messages

Calibration error messages

Operating states

Sensoface

Product line and accessories

Contact information

Limited warranty

Index