Hach-Lange SI792 C, SI792x C, SI792x C-FF, SI792x C-PA User Manual

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DOC026.52.00795

si792 C

si792x C

si792x C-FF

si792x C-PA

Contacting Conductivity

2-Wire Transmitters

USER MANUAL

December 2007, Edition 1

Section 1 Specifications ......................................................... 5

Section 2 General information...........................................11

2.1 Safety information ....................................................................11

2.1.1 Use of hazard information ................................................. 11

2.1.2 Precautionary labels.......................................................... 11

2.2 General product information..................................................... 13

2.2.1 Product overview............................................................... 13

2.2.2 FDA 21 CFR part 11 compliance (HART only) ................. 13

2.2.2.1 Electronic signatures for si792(x) C transmitters ....... 14

2.2.2.2 Audit trail for si792(x) C transmitters.......................... 14

Section 3 Installation ..............................................................15

3.1 Hazardous location installation................................................. 16

3.2 Unpacking the transmitter ........................................................17

3.3 Mechanical installation ............................................................. 18

3.3.1 Transmitter assembly........................................................ 18

3.3.2 Mounting ........................................................................... 18

3.3.2.1 Wall mount ................................................................. 18

3.3.2.2 Panel or pipe mount (optional) ................................... 18

3.4 Wiring Safety Information......................................................... 20

3.5 Electrical installation................................................................. 21

3.5.1 Wire preparation................................................................ 21

3.5.2 Power and communication connections............................ 23

3.5.2.1 si792(x) C (4-20 mA/HART) wiring............................. 24

3.5.2.2 si792x C-FF and si792x C-PA wiring .........................25

3.5.3 Sensor wire connections ................................................... 25

3.5.3.1 2-electrode (3400 and 810x series) sensor wiring .....26

3.5.3.2 4-electrode sensor wiring ........................................... 27

3.6 HART communication connection............................................ 28

Section 4 Interface and navigation.................................. 29

4.1 si792(x) C (4–20 mA/HART) interface...................................... 29

4.2 si792x C-FF and si792x C-PA interface ................................... 30

Table of Contents

4.3 Display...................................................................................... 31

Section 5 Operation—4–20 mA/HART............................ 33

5.1 Measure mode .........................................................................33

5.2 Configuration............................................................................ 33

5.2.1 Output configuration.......................................................... 34

5.2.1.1 Concentration measurement...................................... 36

5.2.1.2 Time averaging filter...................................................37

5.2.1.3 Output signal during errors......................................... 37

5.2.1.4 Output signal during HOLD ........................................ 38

5.2.2 Temperature compensation configuration.........................39

5.2.3 Alarm settings.................................................................... 40

Section 6 Operation—Foundation Fieldbus................ 41

6.1 Configuration............................................................................ 41

6.1.1 Configuration steps ...........................................................41

6.1.2 Configuration menu........................................................... 42

6.2 Foundation Fieldbus communication........................................ 44

6.2.1 Standard resource block (RB)........................................... 44

6.2.2 Standard analog input block (AI)....................................... 47

6.2.2.1 Operating modes........................................................ 47

6.2.2.2 Set the parameter and units....................................... 47

6.2.2.3 Data processing .........................................................48

6.2.2.4 Alarms ........................................................................ 48

6.2.2.5 Bus parameters for the analog input block.................49

6.2.2.6 Cyclic measured value status..................................... 52

6.2.2.7 Measured value limits—limit bits................................52

6.2.3 Transducer block...............................................................53

6.2.4 Calibration via Foundation Fieldbus.................................. 60

Section 7 Operation—Profibus PA...................................61

7.1 Configuration............................................................................ 61

7.1.1 Configuration steps ...........................................................61

7.1.2 Configuration menu........................................................... 62

7.2 Profibus PA communication .....................................................63

Table of Contents

Section 8 Calibration .............................................................. 67

8.1 Calibration ................................................................................ 67

8.1.1 Enter cell constant............................................................. 68

8.1.2 Calibration with a calibration solution................................ 68

8.1.3 Calibration by comparison or grab sample........................ 69

8.2 Temperature sensor adjustment ..............................................70

Section 9 Maintenance........................................................... 71

9.1 Cleaning the instrument ...........................................................71

9.2 Sensor maintenance ................................................................71

Section 10 Troubleshooting ................................................ 73

10.1 Sensoface ..............................................................................73

10.2 Sensocheck............................................................................73

10.3 Error codes.............................................................................74

10.4 Diagnostic tests...................................................................... 76

Section 11 Replacement parts............................................ 79

11.1 si792 transmitter versions ......................................................79

11.2 Accessories............................................................................ 79

11.3 Replacement parts .................................................................79

Section 12 Contact information......................................... 81

Section 13 Limited warranty ............................................... 84

Appendix A Calibration solutions .................................... 87

Appendix B Concentration curves................................... 91

B.1 Sodium chloride solution -01- NaCl .........................................91

B.2 Hydrochloric acid -02- HCl....................................................... 92

B.3 Sodium hydroxide solution -03- NaOH ....................................93

B.4 Sulfuric acid -04- H B.5 Nitric acid -05- HNO

Appendix C Passcode editor .............................................. 97

Index................................................................................................. 99

.......................................................... 94

2SO4

. .............................................................. 95

Table of Contents

Section 1 Specifications

Specifications are subject to change without notice.

Transmitter

Composition PBT (polybutylene terephthalate) Display LCD

Fittings

Power requirements—HART 14–30 VDC (30 VDC maximum) Power requirements—FF and Profibus PAFISCO bus supply: 9 to 17.5 VDC

Loop current—HART

Current consumption—FF and Profibus PA

Maximum current in case of fault (FDE)—FF and Profibus PA

Measurement error

3,4

3 knockouts for M20 x 1.5 strain reliefs 2 knockouts for ½ inch NPT or rigid

metallic conduit

Linear barrier: 9 to 24 VDC 4–20 mA floating;

3.80–22.00 mA specifiable

<13.2mA

<17.6mA

< 0.3% of current value + 0.05 mA

Specifications

US: si792 C

FM Listed for:

Class I, Division 2

si792x C; si792x C-FF; si792x C-PA FM Listed for:

Class I, Division 1, Groups A, B, C, D Class II, Division 1, Groups E, F Class III, Division 1 Class I, Zone 0, AEx ia, Group IIC T4

Enclosure: Type 2 Canada: si792 C

Certification (may not apply to all sensors. Refer to the control drawing or listing for certification information for the sensor that is used).

Output averaging time constant (HART) 0–120 seconds Storage temperature –20 to 70 °C (–4 to 158 °F) Operating temperature –20 to 55 °C (–4 to 131 °F) Weight Approximately 1 kg

Data retention

CSA Certified to:

Class I, Division 2

si792x C CSA Certified and si792x C-FF; si792x C-PA cFMus Certified to:

Class I, Division 1, Groups A, B, C, D Class I, Division 2, Groups A, B, C, D Sensor: Class I, Zone 0, Group IIC Transmitter: Class I, Zone 1, Group IIC

Enclosure: Type 2 EU: si792x C; si792x C-FF; si792x C-PA: CE Marked to:

EMC Directive 2004/108/EC ATEX Directive 94/9/EC

ATE X: II 2 (1) G EEx ib (ia) IIC T6 Enclosure: IP65

Parameters and calibration data > 10 years (EEPROM)

Passcodes

Sensocheck

Sensor monitor

Communication

HART communication

Foundation Fieldbus (FF_H1)

Specifications

Modifiable according to FDA 21 CFR Part 11 “Electronic Signatures” (HART only)

Polarization detection and monitoring of cable capacitance

Direct display of measured values from sensor for validation (resistance/ temperature)

Digital communication by FSK modulation of loop current, reading of device identification, measured values, status and messages, reading and writing of parameters, start of product calibration, signaling of configuration changes according to FDA 21 CFR Part 11.

Bus-powered device with constant current consumption. Cyclic and acyclic data exchange. 1 resource block, 1 transducer block, 3 analog input function blocks (selectable: conductivity, resistivity, concentration, salinity, temperature, cell constant)

Execution time: 50 ms Certified to ITK 4.6 Physical interface: to IEC 1158-2 Address range: 017 to 246

Specifications

Bus-powered device with constant current consumption. Cyclic and acyclic data exchange. Physical block, 2 analog input function blocks, 2 discrete input blocks, logbook block, alarm block.

PNO directive: PROFIBUS-PA,

Profibus-PA (DPV1)

Conductivity input

Range, sensor

Range, conductivity

Range, resistivity

Range, concentration Range, salinity 0.0–45 ‰ (0–35 °C)

Range, USP

Profile for Process Control Devices, Version 3.0

Physical interface: Physical interface: MBP-IS (Manchester Bus PoweredIntrinsically Safe) to IEC 1158-2 (DINEN 61158-2)

Connection: via segment coupler to SPC, PC, PCS

Address range: 1 to 126

2-electrode (0.2 µS–200 mS) 4-electrode (0.2 µS–1000 mS)

0.000–9.999 µS/cm

00.00–99.99 µS/cm

000.0–999.9 µS/cm 0000–9999 µS/cm

0.000–9.999 mS/cm

00.00–99.99 mS/cm

000.0–999.9 mS/cm

0.000–9.999 S/m

00.00–99.99 S/m

0.000–9.999 MΩ/cm

00.00–99.99 MΩ/cm

000.0–999.9 MΩ/cm

0.00–9.99% by weight

00.00–99.99 µS/cm

Specifications

Measurement error

3,4

Temperature input

Temperature sensor

Range, Pt100/Pt1000 Range, Pt100/Pt1000 Range, NTC 100 kΩ

Range, NTC 30 kΩ –20.0 to 130.0 °C (–4 to 266°F) Range, NTC 8.55 kΩ

Adjustment range 10 K Resolution 0.1 °C; 0.1 °F

Measurement error

3,4

Temperature compensation 25 °C reference temperature

Applies to si792(x) C and si792x C-FF transmitter only

Applies to si792x C-PA transmitter only

(± 1 count plus sensor error)

IEC 746 Part 1, at nominal operating conditions

< 1% measured value + 0.4 µS* c

Pt100/PT1000/NTC 100 kΩ/ NTC 30 kΩ/NTC 8.55 kΩ (Betatherm) 2-wire connection

–20.0 to 200.0 °C (–4 to 392 °F) –20.0 to 150.0 °C (–4 to 302 °F) –20.0 to 150.0 °C (–4 to 302°F)

–10.0 to 130.0 °C (14 to 266°F)

< 0.5 K (< 1 K for Pt100;<1 K for NTC >100 °C)

Specifications

Section 2 General information

2.1 Safety information

Please read this entire manual before unpacking, setting up, or operating this equipment. Pay attention to all danger and caution statements. Failure to do so could result in serious injury to the operator or damage to the equipment.

To ensure that the protection provided by this equipment is not impaired, do not use or install this equipment in any manner other than that specified in this manual.

2.1.1 Use of hazard information

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.

2.1.2 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 instrument, references the instruction manual for operation and/or safety information.

General information

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: For return for recycling, please contact the equipment producer or supplier for instructions on how to return end-of-life equipment, producer-supplied electrical accessories, and all auxiliary items for proper disposal.

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

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 the location of a fuse or current limiting device.

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 strong corrosive or other hazardous 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, indicated the presence of devices sensitive to Electro-static Discharge (ESD) and indicated that care must be taken to prevent damage with the equipment.

This symbol, when noted on the product, identifies the presence of noxious substances 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.

General information

2.2 General product information

2.2.1 Product overview

The si792 C and si792x C transmitters are used for measurement of electrical conductivity and temperature in liquids. Fields of application are: biotechnology, chemical industry, environment, food processing and water/waste-water treatment.

The molded transmitter enclosure can be attached to a panel, wall, post or pipe railing. The optional hood (see Accessories on page 79) provides protection against direct weather exposure and mechanical damage.

Three communication options are available for the si792 transmitter:

• 4–20 mA/HART—si792 C and si792x C (noted as si792(x) C)

• Foundation Fieldbus—si792x C-FF

• Profibus PA—si792x C-PA This user manual includes instructions for all three protocols.

Important Note: An ‘x’ in the model number is an indication of an intrinsically safe (IS) instrument.

The instruments are programmed at the factory with different default settings for the standard and the EU versions. The default settings accommodate regional safety standards and can be changed by the user. This user manual includes instructions for both versions. See

si792 transmitter versions on page 79 for a list of instrument

versions.

2.2.2 FDA 21 CFR part 11 compliance (HART only)

In the directive “Title 21 Code of Federal Regulations, 21 CFR Part 11, Electronic Records; Electronic Signatures“ the US American health agency FDA (Food and Drug Administration) regulates the production and processing of electronic documents for pharmaceutical development and production. The features described in section 2.2.2.1

General information

and section 2.2.2.2 make the transmitter compliant with the requirements of FDA 21 CFR Part 11.

2.2.2.1 Electronic signatures for si792(x) C transmitters

Device functions are protected by passcode access, which prevents unauthorized modification of device settings or manipulation of measurement results. Passcodes may be used as electronic signatures. Passcodes can be edited with the passcode editor (Appendix C on page 97).

2.2.2.2 Audit trail for si792(x) C transmitters

The si792(x) can automatically track all changes to the device settings. Each change is tagged with a Configuration Change flag, which is documented using HART communication. Altered device settings or parameters can be retrieved from the transmitter using HART communication.

Section 3 Installation

DANGER Explosion hazard. Trained personnel only must install or commission the equipment.

DANGER Explosion hazard. Never connect items to the transmitter that are not specified on the control drawing. Do not connect or disconnect any equipment unless power has been switched off or the area is known to be non-hazardous.

DANGER Explosion hazard. The safety of the transmitter may be impaired if any of the following conditions have occurred:

• visible damage

• storage above 70 °C for prolonged periods

• exposure to severe transport stresses

• previous installation

• failure to operate properly

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

The si792 and si792x transmitters differ in hazard classification. The si792 transmitter is designed for non-hazardous or Class I, Division 2, Groups A, B, C, D hazardous locations. The si792x transmitter is designed for Class I, Division 1, Groups A, B, C, D hazardous locations. Refer to the control drawing on the Complete Documentation CD or to the listing appropriate to the site location.

For outdoor installation, install a protective hood or sunshield (see Accessories on page 79).

Installation of the si792x in an outdoor hazardous location per FM or CSA control drawings requires a suitable enclosure and must follow NEC guidelines. Refer to NEMA 250 to determine enclosure needs.

Installation

3.1 Hazardous location installation

Before installation, review the applicable Hazardous Location Control Drawing or ATEX EC-Type Examination certificate that is included with the instrument and the provided documentation CD. Follow all regulations specified for the installation location.

Refer to the documentation CD for manuals provided in other languages.

Installation

3.2 Unpacking the transmitter

Check the shipment for transport damage and make sure all components have been shipped complete. The package includes:

• Display module • Bag of hardware and fasteners

• Back enclosure • Test report and user manual

Figure 1 Instrument Components

1 Back enclosure 8 Strain relief (3x) 2 Optional conduit hardware 9 Filler plug (3x) 3 Conduit washer 10 Enclosure screw (4x) 4 Jumper (2x) 11 Display module 5 Cable tie (3x) 12 Hinge pin 6 Sealing insert 13 Hex nuts (5x) 7 Rubber reducer 14 Sealing plug (2x)

Installation

3.3 Mechanical installation

3.3.1 Transmitter assembly

Refer to Figure 1 and the following instructions to assemble the transmitter.

1. Insert the strain relief fittings in the holes of the back enclosure and secure with the hex nuts (Figure 2).

2. Insert the conduit hardware or plugs in the back enclosure and secure with the hex nuts.

3. Attach the display module to the back enclosure using the hinge pin.

3.3.2 Mounting

Refer to the following sections to mount the transmitter on a wall, panel or pipe.

3.3.2.1 Wall mount

1. Use a punch to open the two wall-mount holes in the back enclosure

(Figure 2).

2. Drill holes in the wall suitable for the user-supplied mounting bolts.

3. Attach the back enclosure to the wall using two customer-supplied

bolts.

4. Insert the clear plastic plugs into the mounting holes.

3.3.2.2 Panel or pipe mount (optional)

Refer to Figure 2 and the instructions supplied with the panel and pipe mounting kits (see Accessories on page 79).

Installation

Figure 2 Wall attachment dimensions

1 Breakout for wall mounting (2x) 5 Groove for panel mount gasket 2 Hole for pipe mounting (4x) 6 Strain relief opening (3x) 3 Strain relief (3x) 4 Breakout for panel mounting

7 Strain relief or ½ inch conduit opening

(2x) Ø 21.5 mm [0.85 in]

Installation

3.4 Wiring Safety Information

When making any wiring connections to the instrument, the following warnings and notes must be adhered to, as well as any warnings and notes found throughout the individual installation sections. For more safety information refer to section 2.1 on page 11.

DANGER Always disconnect power to the instrument when making any electrical connections.

Electrostatic Discharge (ESD) Considerations

To minimize hazards and ESD risks, maintenance procedures not requiring power to the analyzer should be performed with power removed.

Delicate internal electronic components can be damaged by static electricity, resulting in degraded instrument performance or eventual failure.

The manufacturer recommends taking the following steps to prevent ESD damage to the instrument:

• Before touching any electronic components (such as printed circuit cards and the components on them) discharge static electricity from the body by touching an earth-grounded metal surface such as the chassis of an instrument or a metal conduit or pipe.

• To reduce static build-up, avoid excessive movement. Transport static-sensitive components in anti-static containers or packaging.

• To discharge static electricity from the body and keep it

discharged, wear a wrist strap connected by a wire to earth ground.

• Handle all static-sensitive components in a static-safe area. If

possible, use anti-static floor pads and work bench pads. Δ

Installation

3.5 Electrical installation

DANGER Explosion hazard. Do not connect any components that are not specified for the device. Always defer to the Hazardous Location Control Drawing.

Prerequisites:

• Review the applicable control drawing or ATEX EC-Type Examination certificate

• Review the electrical code regulations

• Review the regulations for electrical installations in hazardous locations, if appropriate (e.g. EN 60079-10/EN60079-14; 94/9/EC directive; NEC; CEC; Profibus Technical Guidelines

2.091)

• Remove power or confirm non-hazardous status before making any connections

• Confirm that the intrinsic safety of the device is maintained when connected to other equipment such as a power supply unit.

3.5.1 Wire preparation

To remove the terminal blocks from the transmitter for sensor wiring:

1. Insert a flat screwdriver between the terminal block and the transmitter body.

2. Use the screwdriver as a lever to lift the terminal block off the connectors (see Figure 3).

Installation

Figure 3 Wire preparation and insertion

1 Stripping lengths for cables 6 Terminals (vary by model number) 2 Stripping lengths for coaxial cables 7 Typical terminal 3 Cable shield connector (not used) 8 Seat insulation against connector 4 ESD shield removed 9 Removing terminal with screwdriver 5 Areas for screwdriver to pry terminal 10 Cable loop position in housing

Installation

3.5.2 Power and communication connections

DANGER Explosion hazard. The AC power source for the power supply unit cannot exceed 250 VAC. Do not connect the transmitter directly to an AC power source.

DANGER Explosion hazard. The output voltage of the power supply unit cannot exceed 30 VDC. The si792x transmitter must be connected to an appropriately certified explosion-proof power supply unit. Refer to "associated apparatus" in the control drawing or to the EC-Type Examination Certificate for input ratings.

Prerequisites

• Trained personnel only must install or commission the

equipment.

• Follow the instructions in this user manual and the applicable

local and national codes.

• Observe the technical specifications and input ratings during

installation.

• Disconnect all power sources during wiring and installation.

• Use single wires/flexible leads up to 2.5 mm (AWG 14) for

connection to terminals.

• Do not damage the wire when stripping the insulation.

• All parameters must be set by a system administrator (Authority

Having Jurisdiction) before commissioning.

Installation

3.5.2.1 si792(x) C (4-20 mA/HART) wiring

DANGER Explosion hazard. Never connect items to the transmitter that are not specified on the control drawing/ATEX EC-Type certificate.

Refer to Figure 4 and Table 1 to connect the power supply to the si792(x) C transmitter.

Figure 4 si792(x) C (4–20 mA/HART) wiring

1 HART connection (see warnings in

section 3.6 on page 28)

Table 1 Terminal assignments—si792(x) C (4–20 mA/HART)

Terminal No. Assignment

9 Equipotential bonding—ATEX only (Do not use for FM or CSA)

10 4–20 mA output (–) 11 4–20 mA output (+)

2 Wiring terminals—see Table 1

Installation

3.5.2.2 si792x C-FF and si792x C-PA wiring

Refer to Figure 5 and Table 2 to connect power and communications to the si792x C-FF or si792x C-PA transmitters.

Figure 5 si792x C-FF and si792x C-PA wiring

1 Wiring terminals—see Table 2

Table 2 Terminal assignments—si792x C-FF and si792 C-PA

Terminal No. Assignment

9 Equipotential bonding—ATEX only (Do not use for FM or CSA) 10 Connection from Foundation Fieldbus or Profibus PA (–) 11 Connection from Foundation Fieldbus or Profibus PA (+)

3.5.3 Sensor wire connections

Important Note: Do not connect earth ground to the shield connector in the transmitter. Connect the cable shields to the shield connector.

Refer to the following sections to connect the transmitter to a sensor:

• 2-electrode sensor—section 3.5.3.1 on page 26

• 4-electrode sensor—section 3.5.3.2 on page 27

Installation

3.5.3.1 2-electrode (3400 and 810x series) sensor wiring

1. Install jumpers between terminals 1-2, 3-4 and 4-5 (see Figure 6).

2. Use Table 3 to wire the sensor to the transmitter.

Figure 6 si792 transmitter wiring for 2-electrode sensor

1 Jumpers between 1–2, 3–4, 4–5 2 Wiring terminals—see Table 3

Table 3 Terminal assignments—2-electrode sensor

Terminal Assignment

2 Inner electrode, Sense black white/yellow 3 Outer electrode, Drive red red

Cable shield connections

Note:

Do not connect to earth ground.

7 RTD (resistive temperature device) blue blue 8 RTD (resistive temperature device) white black

Hach 3400

series color

clear white/orange

831x series

color

Installation

3.5.3.2 4-electrode sensor wiring

1. Install a jumper between terminals 4 and 5 as shown in Figure 7.

2. Use Table 4 to wire the sensor to the transmitter.

Figure 7 si792 transmitter wiring for 4-electrode sensor

1 Jumper between terminal 4 and 5 2 Wiring terminals—see Table 4

Table 4 Terminal assignments—4-electrode sensor

Terminal No. Assignment Wire color

1 Drive hi brown 2 Sense hi yellow 3 Sense lo green 4 Drive lo white

7 RTD (resistive temperature device) pink 8 RTD (resistive temperature device) grey

Cable shield connections

Note:

Do not connect to earth ground.

black

Installation

3.6 HART communication connection

DANGER The si792x transmitter must be used with an explosion-proof HART communication device. Refer to the appropriate control drawing for the location of the HART (Rosemount) device.

The handheld HART communication device can only be connected to the transmitter in US Class I, Division 1 classified locations (permitted only by FM). Do not connect the handheld Hart communication device to the transmitter in any Zone or Canadian Class I, Division 1 classified location. Refer to Figure 4 on page 24 for the connector location.

Section 4 Interface and navigation

The si792 transmitter user interface contains a display, indicators and keys for navigation and menu selection.

4.1 si792(x) C (4–20 mA/HART) 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. Refer to Figure 8 to identify the keys and indicators of the si792(x) C transmitter.

Figure 8 User interface—si792(x) C transmitter

1 Calibration key 7 Wash mode indicator (not available) 2 Configure key 8 Configuration mode indicator 3 Measure mode indicator 9 Up arrow key 4 Calibration mode indicator 10 Right arrow key 5 Alarm indicator 6 Display

11 Enter key

Interface and navigation

4.2 si792x C-FF and si792x C-PA interface

Refer to Figure 9 to identify the keys and indicators of the si792x C-FF or si792x C-PA transmitter.

Figure 9 User interface—si792x C-FF and si792x C-PA transmitters

1 Measure key 7 Communication indicator 2 Calibration key 8 Configuration mode indicator 3 Measure mode indicator 9 Up arrow key 4 Calibration mode indicator 10 Right arrow key 5 Alarm indicator 11 Enter key 6 Display 12 Configuration mode

Interface and navigation

4.3 Display

Figure 10 identifies all of the possible icons and symbols that may be

seen in the si792 transmitter display.

Figure 10 si792 display

1 Passcode 13 Secondary display 2 Temperature 14 Alarm mode 3 4–20 mA output (HART) 15 Manual temperature on 4 Limit values (Foundation Fieldbus

and Profibus PA)

5 Alarm 17 Hold mode on 6 Sensocheck 18 Hourglass 7 Calibration 19 Measure mode 8 Calibration interval 20 Calibration indicator 9 Parameter 21 Zero indicator/error 10 Enter prompt 22 Slope indicator/error 11 Configuration mode 12 Main display

16 Calibration mode

23 Sensoface

Interface and navigation

Section 5 Operation—4–20 mA/HART

The following section describes how to operate the si792(x) C transmitter.

5.1 Measure mode

The display shows the configured process variable (conductivity, concentration, resistivity or salinity) and the temperature value in the measuring mode.

• To return to the measurement mode during calibration press and ENTER.

• To return to the measurement mode during configuration press

CONF and ENTER.

Note: The waiting time for the stabilization of the measured-value is approximately 20 seconds.

5.2 Configuration

Use the configuration mode to specify the sensor, range and other parameters for the system as shown in Table 5.

1. Press CONF and enter 1200 to enter the configuration mode.

2. Use the arrow and enter keys to change the settings. All settings

and options are shown in section 5.2.1, section 5.2.2 and

section 5.2.3.

Table 5 Configuration menu

Code Parameter Passcode

o1 4–20 mA current output

AL. Alarm settings

To exit the configuration mode at any time, press The output current will be held for 20 seconds and the measured value will be shown.

1200tc Temperature compensation

CONF and ENTER.

CAL

Operation—4–20 mA/HART

Note: During configuration the transmitter remains in the Hold mode for safety reasons. The loop current is frozen at the value specified in the o1.HoLD menu option. The Sensoface icon is inactive. The configuration mode indicator is shown (Figure 10 on page 31).

5.2.1 Output configuration

Select the sensor

CELL

Select the range and units

o1. UnIT

If range is set to 00.00%, select solution (Conc)

o1.CoNC

2-electrode sensor (default) 4-electrode sensor

0.000 µS/cm

00.00 µS/cm

000.0 µS/cm 0000 µS/cm

0.000 mS/cm

00.00 mS/cm

000.0 mS/cm (default)

0.000 S/m

00.00 S/m

00.00 MΩ·cm Resistivity

000.0 SAL Salinity (SAL)

00.00% Concentration (Conc)

USP

-01- NaCl (default)

-02- HCI

-03- NaOH

-04- H

2SO4

-05- HNO

Conductivity

Water monitoring in the pharmaceutical industry (USP)

Solution (Conc) (refer to section 5.2.1.1 on page 36 for

more information)

Operation—4–20 mA/HART

5.2.1 Output configuration (continued)

Select characteristic (Linear / Logarithmic curve)

LIN (default)

o1.CHAR

Specify the value for the 4 and 20 mA signals

o1. 4mA 000.0 mS LIN: Enter current start o1.20mA 000.0 mS LIN: Enter current end o1. 4mA 1 mS (default) LOG: Enter current start o1.20mA 100 mS (default) LOG: Enter current end

Set time averaging filter for reducing noise

o1.FtME 0 SEC (default)

Select a 22 mA signal during errors

o1.FAIL

Signal behavior during HOLD

o1.HOLD

Specify the value to output during HOLD periods

o1.FIX 021.0 mA (default)

If the process variables SAL, % (Conc) or USP are selected the following steps

(Lin/Log) are omitted

LOG

ON OFF (default)

LAST (default)

FIX

Note: During configuration the instrument/transmitter remains on Hold. Depending on the configuration the loop current is frozen at its last value or at a preset fixed value.

ENTER to access a menu item. Use the ARROW KEYS to edit

Press values. Press

ENTER to save the settings. If a value is outside of the

Linear/Logarithmic curve

Time constant of output filter (refer to

section 5.2.1.2 for more information)

During HOLD the last measured value is maintained at the output

During HOLD a value (to be entered) is maintained at the output

During HOLD the entered value is maintained at the output (refer to

section 5.2.1.4 for more information)

Operation—4–20 mA/HART

acceptable range, “Err” will be shown and the value will not be accepted. To exit the menu and return to the measurement mode, press

CONF and ENTER.

Example: Set the output start point for the 4 mA signal to be 10.0 mS

and the output end point to be 100 mS for the 20 mA signal.

1. Press

2. Press

3. Press

4. Use the

5. Use the

6. Press

5.2.1.1 Concentration measurement

For the solutions listed in Table 6, the transmitter determines the concentration from the measured conductivity and temperature values in percent by weight.

The measurement error is made up of the sum of measurement and the stored accuracy of the concentration curves (see

page 91

CONF, enter passcode: 1200. The display will show Conf and

then out.1MNU.

ENTER to access the output setup menu. The display will

CELL.

show

ENTER, ENTER, ENTER to reach the 4 mA submenu. The

display will show o1.4mA.

UP ARROW and RIGHT ARROW to edit the value to read

10.0 mS value. Press

ENTER to save the value. The display will

show o1.20mA.

UP ARROW and RIGHT ARROW to edit the value to read

100.0 mS value. Press

ENTER to save the value. The display will

show o1.FtME.

CONF and ENTER to exit the configuration menu.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measurement mode.

section B.1 on

Operation—4–20 mA/HART

For accurate results use conductivity standards with the same conductivity range as the sample to calibrate the system.

Table 6 Range of concentration

Code Action Range

-01- NaCl (default)

-02- HCI

o1.CoNC

-03- NaOH

-04- H

2SO4

-05- HNO

5.2.1.2 Time averaging filter

An averaging filter is available to reduce noise in the output signal. The filter averages readings over a specified time interval. The time interval can be set from 0 to 120 seconds (default: 0 seconds).

When set to 0 seconds, there is no signal averaging for noise reduction. When set to 120 seconds, the current output value will correspond to the process signal averaged over the last 120 seconds. Increase the time interval to reduce the noise in the output signal.

Note: The filter acts on the output signal but not on the displayed value.

5.2.1.3 Output signal during errors

When an error condition occurs, a 22 mA output signal can be sent as a notification (default: off).

0.00–9.99% by weight 0–100 °C (32–212 °F)

0.00–9.99% by weight 0–50 °C (32–122 °F)

0.00–9.99% by weight 0–100 °C (32–212 °F)

0.00–9.99% by weight 0–110 °C (32–230 °F)

0.00–9.99% by weight 0–50 °C (32–122 °F)

Operation—4–20 mA/HART

5.2.1.4 Output signal during HOLD

The output signal during hold periods can be maintained at the last measured value (Figure 11) or fixed at a specified value (Figure 12). The allowable range for the fixed value is 3.4 to 22 mA.

Figure 11 Output signal during HOLD—last value

1 Output signal during HOLD 2 HOLD mode

Figure 12 Output signal during HOLD—fixed value

1 Output signal during HOLD 2 HOLD mode

Operation—4–20 mA/HART

5.2.2 Temperature compensation configuration

Select temperature unit

tc.UnIT

Select temperature sensor

tc.rTd

Select temperature compensation

tc. LIN

If SAL or USP is selected, the following steps are omitted.

Note: Calibrate a temperature sensor adjustment for a correct temperature measurement. Use a separate temperature sensor with fast response for measuring processes with rapid temperature changes.

Press ENTER to access a menu item. Use the ARROW KEYS to edit values. Press ENTER to save the settings. If a value is outside of the acceptable range, “Err” will be shown and the value will not be

°C (default) °F

PT100 (default for EU version) PT1000 (default for standard version) 30 NTC

8.55 NTC

Linear temperature compensation with entry of temperature coefficient (00.00–19.99%/

LIN (default)

nLF

nACL

HCL

nH3

OFF Temperature compensation turned off

K). Reference temperature = 25 °C. Enter temperature coefficient

02.00%/K (default) (xx.xx%/K) Temperature compensation for naturals

waters to EN 27888 NaCl: temperature compensation for

ultrapure water with NaCl traces (0–120 °C) HCl: temperature compensation for ultrapure

water with HCl traces (0–120 °C) NH

: temperature compensation for

ultrapure water with NH

traces (0–120 °C)

Operation—4–20 mA/HART

accepted. To exit the menu and return to the measurement mode, press

CONF and ENTER.

5.2.3 Alarm settings

Select Sensocheck

AL.SnSO

Enter alarm delay

AL.dLY 0010 sec (default) Range: 0–600 sec

LED in Hold mode

AL.LED

CHECK ON CHECK OFF (default)

HOLD ON LED blinks during hold HOLD OFF LED off during hold

Continuous Sensocheck evaluation of sensor function

Section 6 Operation—Foundation Fieldbus

The following section describes how to navigate and operate the si792x C-FF transmitter. The transmitter can be operated as follows:

• Direct interface with the transmitter (section 6.1)

• Foundation Fieldbus communication (section 6.2 on page 44)

6.1 Configuration

Use the configuration mode to specify the sensor, range and other parameters of the system.

6.1.1 Configuration steps

Complete the following steps to configure the si792 transmitter.

1. Press MEAS + CAL and enter 1200 to enter the configuration

mode.

2. Use the arrow and enter keys to change the settings. All settings

and options are shown in section 6.1.2.

To exit the configuration mode at any time, press MEAS + CAL and

ENTER. The Hold mode will be active for 20 seconds and then the

then measured value will be displayed.

Note: During configuration the transmitter remains in the Hold mode for safety reasons. The Sensoface icon is inactive. The configuration mode indicator is displayed (Figure 10 on page 31).

Operation—Foundation Fieldbus

6.1.2 Configuration menu

Select the sensor

In.CELL

Select the range and units

In.UnIT

Select temperature unit

tc.UnIT

Select temperature sensor

tc.rTd

2-electrode sensor (default) 4-electrode sensor

0.000 µS/cm

00.00 µS/cm

000.0 µS/cm 0000 µS/cm

0.000 mS/cm

00.00 mS/cm

000.0 mS/cm (default)

0.000 S/m

00.00 S/m

00.00 MΩ·cm Resistivity

000.0 SAL Salinity (SAL)

00.00%

USP

°C (default) °F

PT100 (default for EU version) PT1000 (default for standard version)

8.55 NTC 30 NTC

Conductivity

Concentration In.CoNC

Water monitoring in the pharmaceutical industry (USP)

-01- NaCl (default)

-02- HCI

-03- NaOH

-04- H

-05- HNO

2SO4

Operation—Foundation Fieldbus

6.1.2 Configuration menu (continued)

Select temperature compensation

OFF Temperature compensation turned off

LIN (default)

tc.

Select Sensocheck

AL.SnSO

LED in Hold mode

AL.LED

Enter Fieldbus address (optional)

FF.ADR 0026 BUS (default) Range: 0017–0031

Temperature compensation is not available for salinity, concentration or USP.

Use only when there is no bus connection. The transmitter will restart and set all

parameters to default values. Individual settings must be entered once more.

nLF Natural waters (to EN 27888) nACL Ultrapure water with NaCl traces (0–120 °C) HCL Ultrapure water with HCl traces (0–120 °C) nH3

CHECK ON CHECK OFF (default)

HOLD ON LED blinks during hold HOLD OFF (default) LED off during hold

Linear temperature compensation Enter temperature coefficient:

Range: 0–19.99%/K (default: 2.00%/K) Reference temperature = 25 °C

Ultrapure water with NH

Continuous Sensocheck evaluation of sensor function

traces (0–120 °C)

Operation—Foundation Fieldbus

6.2 Foundation Fieldbus communication

Use the Foundation Fieldbus specification to set up and configure the si792 transmitter. The communication parameters are listed in the following sections. The sensor can be calibrated as described in

section 6.2.4 on page 60.

6.2.1 Standard resource block (RB)

The standard resource block describes the transmitter characteristics (manufacturer, device name, operating status, global status). The resource block must be in automatic mode for any of the other blocks to operate. The bus parameters for the standard resource block (RB) are shown in Table 7.

Table 7 Bus parameters—resource block (RB)

Parameter Description Default R/W

ST_REV Static revision 0 R TAG_DESC TAG description R/W STRATEGY Strategy 0 R/W ALERT_KEY Alert key 0 R/W

Ta rg e t

MODE_BLK

BLOCK_ERR Block error R

RS_STATE

TEST_RW Test R/W DD_RESOURCE DD resource R MANUFAC_ID Manufacturer ID 0x001D6D for Hach R DEV_TYPE Device type 0x0064 R DEV_REV Device revision 1 R DD_REV DD revision 1 R

Actual Permitted OOS, Auto Normal Auto

Resource state (operating status)

(out of service)

OOS

R/W

Operation—Foundation Fieldbus

Table 7 Bus parameters—resource block (RB) (continued)

Parameter Description Default R/W

GRANT_DENY

HARD_TYPES Hardware type 1 R RESTART Restart R/W FEATURES Feature supported Reports/ Soft W Lock R FEATURES Feature selected Reports/ Soft W Lock R/W

CYCLE_TYPE Cycle type

CYCLES_SEL Cycle selected

MIN_CYCLE_T Min cycle time MEMORY_SIZE Memory size R NV_CYCLE_T Non-volatile cycle time R FREE_SPACE Free space R FREE_TIME Free time R SHED_RCAS R/W SHED_ROUT R/W FAULT_STATE Fault state R SET_FSTATE Set fault state 1 R/W CLR_FSTATE Clear fault state 1 R/W MAX_NOTIFY Max notifications 20 R LIM_NOTIFY Limit of notification 8 R/W CONFIRM_TIME Confirmation time

WRITE_LOCK

UPDATE_EVT

Grant 0 R/W Deny 0 R/W

Scheduled/

Block Execution

Scheduled/

Block Execution

1600

/32 ms (50ms)

/32 ms

Write locking (write protection)

Unacknowledged 0 R/W Update state 0 R Time stamp 0 R Static revision 0 R Relative index 0 R/W

640000

1 (Unlocked) R/W

R/W

Operation—Foundation Fieldbus

Table 7 Bus parameters—resource block (RB) (continued)

Parameter Description Default R/W

Unacknowledged R/W

BLOCK_ALM

ALARM_SUM

ACK_OPTION

WRITE_PRI Write priority 0 R/W

WRITE_ALM

ITK_VER ITK_version 4 R

DEVICE_LOCK

Alarm state R Time stamp R Sub-code R Val ue R Current R Unacknowledged R Unreported R Disabled R/W Automatic acknowledge

option

Unacknowledged R/W Alarm state R Time stamp R Sub-code R Val ue R

Locks the device for local access.

1 byte Data type = uns8 Range:

0 (Unlocked) 1 (Locked)

0 (Disabled) R/W

0 (Unlocked) R/W

Operation—Foundation Fieldbus

6.2.2 Standard analog input block (AI)

Three Analog Input Function Blocks provide for cyclic transmission of measured values (currently measured value with status, alarm limits, freely selectable process parameter).

6.2.2.1 Operating modes

Use the MODE_BLK parameter to set the following operating modes:

• OOS—out of service. If not write-protected, access to all parameters is allowed.

• MAN—manual

• Auto—online, normal state

6.2.2.2 Set the parameter and units

Use CHANNEL to set the measured parameter and units (Table 8). The corresponding measurement unit is selected in the UNITS subparameter of XD_SCALE (Table 9 on page 49).

Table 8 Measurement parameters and units

Channel Parameter Unit Unit value

µS/cm 1586

1 Conductivity

2 Concentration % (percent) 1342

3 Temperature

4 Salinity per mill 2003 5Resistance MΩ/cm 1587 6 Cell constant

mS/cm 1302 S/cm 1299

°C 1001 °F 1002

-1

2004

Operation—Foundation Fieldbus

6.2.2.3 Data processing

Use the L_TYPE parameter to apply a linearization function to the data.

• Direct—data is sent directly from the TB to the AI without processing. The units for the XD_SCALE and OUT_SCALE parameters must be identical.

• Indirect—data from the TB is linearly scaled from the input scale (XD_SCALE) to the output scale (OUT_SCALE).

• Indirect square root—data is rescaled from the input scale (XD_SCALE) and recalculated using a root function. Then the value is linearly scaled to the output scale (OUT_SCALE).

6.2.2.4 Alarms

The AI block can generate block alarms and limit alarms. Use the ACK_OPTION parameter to specify if an alarm must be acknowledged. When the measured value status is “bad”, the AI block BLOCK_ERR parameter indicates an Input Failure.

• Block alarms—a block error will be reported via the BLOCK_ERR parameter (simulate active, input failure, block configuration error, out of service (OOS)). The BLOCK_ALM parameter sends the alarm status to the control system.

• Limit alarms—the measured value OUT falls outside of the limit values (HI_HI_LIM, HI_LIM, LO_LIM, LO_LO_LIM).

If an alarm occurs, evaluate the following bus parameters:

• OUT parameter (currently measured value) in the Al block

• LAST_ERROR parameter in the transducer block

• SENSOFACE_STATUS parameter in the transducer block

Operation—Foundation Fieldbus

6.2.2.5 Bus parameters for the analog input block

The bus parameters for the analog input function block (AI) are shown in Table 9.

Table 9 Bus parameters/analog input blocks (AI)

Parameter Description Default R/W

ST_REV Static Revision 0 R TAG_DESC TAG Description R/W STRATEGY Strategy 0 R/W ALERT_KEY Alert Key 0 R/W

Target OOS

MODE_BLK

BLOCK_ERR Block Error R

OUT

SIMULATE

XD_SCALE

OUT_SCALE

Actual Permitted OOS, Auto Normal Auto

Process Value R Status R Measured Value R Status R Simulate Status R/W Simulate Value R/W Transducer Status R Transducer Value R Simulate Enable / Disable R/W High Range 100 R/W Low Range 0 R/W Units Index 0 R/W Decimal Point 0 R/W High Range 100 R/W Low Range 0 R/W Units Index 0 R/W Decimal Point 0 R/W

R/W

Operation—Foundation Fieldbus

Table 9 Bus parameters/analog input blocks (AI) (continued)

Parameter Description Default R/W

GRANT_DENY

IO_OPTS IO Block Options 0 R/W STATUS_OPTS Status Options CHANNEL Channel 1 R/W L_TYPE Linearization Type 0 R/W LOW_CUT Low Cut Off 0 R/W PV_TIME Filter Time 0 R/W

FIELD_VAL

UPDATE_EVT

BLOCK_ALM

ALARM_SUM

ACK_OPTION

AlARM_HYS Alarm Hysteresis 0.50% R/W HI_HI_PRI High High Priority 0 R/W HI_HI_LIM High High Limit INF R/W HI_PRI High Priority 0 R/W HI_LIM High Limit INF R/W LO_PRI Low Priority 0 R/W

Grant 0 R/W Deny 0 R/W

Percent Value R Status R Unacknowledged 0 R/W Update State 0 R Time Stamp 0 R Static Revision 0 R Relative Index 0 R Unacknowledged 0 R/W Alarm State 0 R Time Stamp 0 R Sub-code 0 R Current 0 R Unacknowledged 0 R Unreported 0 R Disabled 0 R/W Automatic Acknowledge

Option

0R/W

Operation—Foundation Fieldbus

Table 9 Bus parameters/analog input blocks (AI) (continued)

Parameter Description Default R/W

LO_LIM Low Limit –INF R/W LO_LO_PRI Low Low Priority 0 R/W LO_LO_LIM Low Low Limit –INF R/W

Unacknowledged 0 R/W

HI_HI_ALM

HI_ALM

LO_ALM

LO_LO_ALM

Alarm State 0 R Time Stamp 0 R Sub-code 0 R Value 0 R Unacknowledged 0 R/W Alarm State 0 R Time Stamp 0 R Sub-code 0 R Value 0 R Unacknowledged 0 R/W Alarm State 0 R Time Stamp 0 R Sub-code 0 R Value 0 R Unacknowledged 0 R/W Alarm State 0 R Time Stamp 0 R Sub-code 0 R Value 0 R

Operation—Foundation Fieldbus

6.2.2.6 Cyclic measured value status

The cyclic measured value status is shown in Table 10.

Table 10 Cyclic measured value status

Priority Quality Sub-status

Low

Good

Uncertain

Bad

High Out of Service 00 01 11 xx 0 x 1C

Good Non-Specific 10 00 00 00 0 x 80 Good Active Advisory Alarm 10 00 10 xx 0 x 88 Good Active Critical Alarm 10 00 11 xx 0 x 8C Uncertain Non-Specific 01 00 00 xx 0 x 40 Last Usable Value (LUV) 01 00 01 xx 0 x 44 Substitute-Set 01 00 10 xx 0 x 48 Initial Value 01 00 11 xx 0 x 4C Sensor Conversion Not Accurate 01 01 00 xx 0 x 50 Engineering Unit Violation 01 01 01 xx 0 x 54 Sub-Normal 01 01 10 xx 0 x 58 Non-Specific 00 00 00 xx 0 x 00 Sensor Failure 00 01 00 xx 0 x 10 Device Value 00 00 11 xx 0 x 0C

Bin-coding (no limit bits)

6.2.2.7 Measured value limits—limit bits

The respective status bit is set when a condition occurs (Table 11). The status bit is reset when the condition no longer exists.

Table 11 Limit bit description

Bin coding of limit bits Description

00 OK 01 Low-limited 10 High-limited

11 Constant

Hexcoding

Operation—Foundation Fieldbus

Range

The revision value is

incremented every

time a static parame-

ter in the block is

changed.

Data

type

6.2.3 Transducer block

The transducer block provides for acyclic data transmission. Calibration, configuration, and

maintenance commands coming from the control station are processed in the Transducer

Block. The bus parameters for the transducer block (TB) are shown in Table 12 (default values

are in bold type).

The revision of the static data

associated with the function

block. Used by the host to

determine when to re-read the

R/W 32 Default: Text

static data.

The user description of the

intended application of the

R/W 2 Default: 0

block.

The strategy field can be used

to identify a grouping of blocks.

Can be used for any purpose

by the user.

R/W 1 Default: 0

Identification number that may

be used by the host system to

sort alarms and other device

information.

Table 12 Transducer block bus parameters

Parameter Description R/W Bytes

ST_REV

TAG -DE SC

STRATEGY

ALERT_KEY

Operation—Foundation Fieldbus

Available modes:

Automatic, Out Of

Service

Range

Data

type

(OOS), Manual

Default: 0

Table 12 Transducer block bus parameters (continued)

Parameter Description R/W Bytes

111

R/WRR/W

Allows the user to set the Tar-

get, Permitted, and Normal

device mode. Displays the

R/W

Actual mode.

Ta rg e t

Actual

Permitted

Normal

Reflects the error status associ-

ated with the hardware or soft-

MODE_BLK

11822

ware of the block. It is a bit

string so multiple errors may be

shown.

BLOCK_ERR

Unacknowledged Update State

Time Stamp Static Rev Relative

Index

UPDATE_EVENT

11821

Unacknowledged Alarm State

Time Stamp Subcode Value

BLOCK_ALM

Range

Data

type

Operation—Foundation Fieldbus

Default: 65535 =

other

Table 12 Transducer block bus parameters (continued)

Directory that specifies the

Parameter Description R/W Bytes

number and the starting indices

of the transducers in the trans-

ducer block.

A transducer block sub-code.

TRANSDUCER_

6.2.4 Calibration via Foundation Fieldbus

The transmitter can be calibrated via Foundation Fieldbus using the comparison or grab sample method.

1. Make sure the system is configured for conductivity or resistivity (PRIMARY_VALUE_TYPE = µS/cm, mS/cm, S/m or MΩ/cm).

2. Collect a grab sample and set CAL_SAMPLE_PRD to sample. The conductivity value of the sample is stored. After writing, the parameter is automatically reset to NOP (no operation).

3. Read the parameter CAL_SAMPLE_PRD_STORED_VAL. It contains the stored value.

4. Measure the grab sample and write the lab value in CAL_PRODUCT. The device is now calibrated. The CAL_SAMPLE_PRD_STORED_VAL parameter is reset to zero.

Section 7 Operation—Profibus PA

The following section describes how to navigate and operate the si792x C-PA Profibus-PA transmitter. The transmitter can be operated as follows:

• direct interface with the transmitter (section 7.1)

• remote operation from the control station (section 7.2 on

page 63)

Note: Calibration must be completed by direct interface with the transmitter.

7.1 Configuration

Use the configuration mode to specify the sensor, range and other parameters for the system.

7.1.1 Configuration steps

1. Press MEAS + CAL and enter 1200 to enter the configuration

mode.

2. Use the arrow and enter keys to change the settings. All settings and options are shown in section 7.1.2.

To exit the configuration mode at any time, press MEAS + CAL and

ENTER. The Hold mode will be active for 20 seconds and then the

then measured value will be displayed.

Note: During configuration the transmitter remains in the Hold mode for safety reasons. The Sensoface icon is inactive. The configuration mode indicator is displayed (Figure 10 on page 31).

Operation—Profibus PA

7.1.2 Configuration menu

Select the sensor

CELL

Select the range and units

Select temperature unit

Select temperature sensor

2-electrode sensor (default) 4-electrode sensor

0.000 µS/cm

00.00 µS/cm

000.0 µS/cm 0000 µS/cm

0.000 mS/cm

00.00 mS/cm

000.0 mS/cm (default)

0.000 MΩ/cm

000.0 MΩ/cm

000.0 SAL Salinity (SAL)

°C (default) °F

PT100 (default for EU version) PT1000 (default for standard version) 30 NTC 100 NTC busEXT (external temp during measurement; manual temp during

calibration, °C)

Conductivity

Resistivity00.00 MΩ/cm

Operation—Profibus PA

7.1.2 Configuration menu (continued)

Select temperature compensation

OFF Temperature compensation turned off

LIN (default)

nLF Natural waters (to EN 27888) –01– FCT Ultrapure water with NaCl traces –02– FCT Ultrapure water with HCl traces –03– FCT

Select Sensocheck

CHECK ON CHECK OFF (default)

Enter Profibus address

Edit 0126 BUS (default) Range: 0001–0126

Temperature compensation is not available for salinity.

Use only when there is no bus connection. The transmitter will restart and set all

parameters to default values. Individual settings must be entered once more.

Linear temperature compensation Enter temperature coefficient:

Range: 0–19.99%/K (default: 2.00%/K) Reference temperature = 25 °C

Enter temperature coefficient

02.00%/K (default) (xx.xx%/K)

Ultrapure water with NH

Continuous Sensocheck evaluation of sensor function

traces

7.2 Profibus PA communication

Profibus uses a master/slave data exchange technique. The master (typically a PLC) generates queries to individual slaves. The slaves, in turn, reply back with a response to the master. A Profibus message contains the information required to send a query or request, including the slave address, function code, data, and a checksum. See Table 13

on page 64 for Profibus communication parameters in case of errors.

Operation—Profibus PA

Logbook

(default)

Table 13 PROFIBUS communication

Text of binary message

Physical Block

No. of

(default)

(PB)

Analog input

status

binary

message

Cause

CHK SLOPE Yes

Global status

1 0000 11xx Failure ERR SYSTEM Yes

2 0000 11xx Failure ERR PARAMETERS Yes

3 0000 11xx Failure ERR MEMORY Yes

Factory settings

defective

Configuration data

defective, Gaincheck

Memory error

(RAM, ROM,

EPROM)

Failure ERR COND VALUE Yes

Failure ERR TEMP VALUE Yes

Failure CHK SENSOR Yes

Maintenance

req.

Function check CAL RUNNING Yes

0100 0111

01 00 1111

0100 0111

01 00 1111

0100 0111

01 00 1111

0100 0111

01 00 1111

4 0101 01xx Failure ERR MEAS VALUE Yes

Cond, sal range

violation

Conductance range

violation

Temp range violation

Temperature probe

Sensocheck 7

Cell constant 8 1010 01xx

Calibration 9

Configuration 10 1010 00xx Function check CONF RUNNING Yes

Table 13 PROFIBUS communication (continued)

Logbook

Text of binary message

Physical Block

Analog input

No. of

(default)

(PB)

Global status

status

binary

message

Operation—Profibus PA

LO_LIMIT SAL

LO_LO_LIMIT COND

LO_LO_LIMIT MOcm

LO_LO_LIMIT SAL

HI_HI_LIMIT TEMP

HI_LIMIT TEMP

Limit 2

17 1000 1010

Bit 2

Limit 2

LO_LIMIT TEMP

Bit 3

18 1000 1001

HI_HI_LIMIT COND

HI_HI_LIMIT MOcm

HI_HI_LIMIT SAL

HI_LIMIT COND

HI_LIMIT MΩ cm

HI_LIMIT SAL

LO_LIMIT COND

LO_LIMIT MΩ cm

Limit 1

Bit 4

Limit 2

Function check HOLD X

Limit 1

Bit 1

Limit 1

Bit 2

Limit 1

Bit 3

0100 0111

01 00 1111

12 1000 1110

13 1000 1010

14 1000 1001

Bit 1

15 1000 1101

16 1000 1110

Cause

HOLD

(Device state =

Maintenance)

HI_HI_LIM

FB analysis

Cond/MO/SAL

HI_LIM

FB analysis

Cond/MO/SAL

LO_LIM

FB analysis

Cond/MO/SAL

LO_LO_LIM

FB analysis

Cond/MO/SAL

HI_HI_LIM

FB temperature

HI_LIM

FB temperature

LO_LIM

FB temperature

Operation—Profibus PA

Logbook

(default)

LO_LO_LIMIT TEMP

Text of binary message

(default)

Limit 2

(PB)

Global status

status

binary

message

Bit 4

19 1000 1101

Table 13 PROFIBUS communication (continued)

Physical Block

Analog input

No. of

Cause

LO_LO_LIM

FB temperature

Logbook empty 20 Function check EMPTY LOGBOOK

Section 8 Calibration

8.1 Calibration

Important Note: Stabilize the temperature during calibration.

Note: Only qualified personnel should conduct the tasks described in

this section of the manual.

The transmitter is adjusted to the sensor through the calibration. Use the following methods and passcodes for calibration as described in

Table 14.

Table 14 Methods and passcodes for calibration

Method Passcode

Display zero/slope 0000 Enter cell constant Calibration with a known calibration solution Calibration by product comparison/grab sample Temperature sensor calibration 1015

For si792(x) C only.

Not available with si792x C-PA.

During calibration the transmitter remains in the Hold mode for safety reasons. The loop current is frozen at the value specified in the o1.HoLD menu option. The Sensoface icon is inactive. The calibration mode indicator is displayed (Figure 10 on page 31).

To exit the calibration mode at any time, press

CAL and then ENTER.

The output current will be held for 20 seconds and the measured value will be displayed.

110 0 0110 110 5

Calibration

8.1.1 Enter cell constant

1. Press CAL and enter passcode: 1100, ENTER. CAL CELL will be

displayed for 3 seconds.

2. Use the

3. Press

4. The transmitter displays the cell constant value and CELL. Press

5. The transmitter remains in HoLD mode. Press

Note: Repeat entry of the cell constant when “Err” is displayed.

8.1.2 Calibration with a calibration solution

Note: Stabilize the temperature during calibration.

1. Press

2. Remove and clean the sensor.

3. Immerse the sensor in the calibration solution. Use the

UP ARROW and RIGHT ARROW to enter the value of the

cell constant of the connected sensor. The conductivity value will be displayed also.

Note: For Hach or GLI contacting conductivity sensors, the cell constant is usually printed on a tag with the sensor wiring.

Note: A cell constant change will change the conductivity value.

Note: If the entry of the cell constant takes longer than 6 seconds,

the display will alternate between showing the conductivity and the temperature value.

ENTER to save the value.

ENTER.

ENTER again.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measure mode.

CAL, enter passcode: 0110, ENTER. CAL SOL will be

displayed for 3 seconds. The transmitter is ready for calibration.

UP ARROW

RIGHT ARROW to enter the value of the calibration solution. If

and temperature compensation is OFF, refer to Appendix A on page 87

Calibration

to determine the temperature-corrected conductivity value of the calibration solution.

Note: If the entry of the calibration solution value takes longer than 6 seconds, the display will alternate between showing the cell constant and the temperature value.

4. Press

5. The display will show the new cell constant value and CELL. Press

6. The transmitter remains in HoLD mode. Press

Note: Repeat the calibration when “Err” is displayed.

Note: The si792x C-PA transmitter cannot be calibrated by this method.

8.1.3 Calibration by comparison or grab sample

The sensor can be calibrated by measuring the process water with a portable instrument or taking a grab sample and measuring its value in the lab (one-point calibration). The sensor does not need to be removed from the process during this calibration. The sample temperature should correspond to the measured process temperature for accurate results.

1. Press

2. Measure the process water and press

ENTER to save the value.

ENTER.

ENTER again.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measure mode.

CAL, enter passcode: 1105, ENTER. The display will briefly

show CAL PRD and then StorE.

ENTER to proceed. The

current value will be stored, which will be compared to the value obtained with the lab or portable meter.

The cal mode indicator will flash to indicate that calibration has not been completed. The transmitter will continue to measure and display the current sample values.

Calibration

3. Measure the grab sample with a laboratory or portable meter.

4. Press

5. Edit the displayed value to match the value measured by the

6. Press

Press in the hold mode for approximately 20 seconds.

Note: For comparison calibration via Foundation Fieldbus, see

section 6.2.4 on page 60.

Note: The si792x C-PA transmitter cannot be calibrated by this method.

CAL, enter passcode: 1105, ENTER to access the product

calibration once more. The display will briefly show CAL PRD and then CALC.

laboratory or portable meter and press calculated cell constant will be displayed.

ENTER to end the calibration. The display will show the

measured value alternating with Hold.

ENTER to return to the measuring mode. The outputs will remain

ENTER. The newly

8.2 Temperature sensor adjustment

1. Press CAL, enter passcode: 1015, ENTER. CALTMP will be

displayed for 3 seconds. The transmitter is ready for calibration.

2. Measure the process temperature with a thermometer.

3. Use the

4. Press

5. The transmitter remains in HoLD mode. Press

Note: Repeat the calibration when “Err” is displayed.

UP ARROW and RIGHT ARROW to enter the value of the

measured temperature from the external thermometer.

ENTER to save the value.

ENTER again.

The transmitter remains in HoLD mode for approximately 20 seconds after calibration and returns to the measure mode.

Section 9 Maintenance

DANGER

Explosion hazard. Only qualified personnel should conduct the tasks described in this section of the manual.

DANGER Electrostatic hazard. Follow the instructions in Electrostatic

Discharge (ESD) Considerations on page 20 before conducting

any maintenance tasks.

9.1 Cleaning the instrument

Use only a moistened antistatic, lint-free cloth to remove dust, dirt and spots from the external surfaces of the transmitter. Use a mild household cleaner if necessary.

9.2 Sensor maintenance

Refer to the user manual supplied with each sensor for specific cleaning requirements.

Maintenance

Section 10 Troubleshooting

10.1 Sensoface

The Sensoface feature is active whenever Sensocheck is active. This feature monitors the sensor for defects in the sensor or cable, and indicates the maintenance status of the sensor (see Table 15).

Table 15 Sensoface description

Sensoface Description

The sensor is operating properly.

The operation of the sensor is acceptable, but will require replacement soon.

The sensor is no longer usable. Replace the sensor.

10.2 Sensocheck

Sensocheck monitors the sensor and its wiring, detects polarization and monitors the cable capacitance. When problems are detected, the error message “Err 33” is displayed, along with an icon corresponding to the type of problem (see Table 16).

Sensocheck can be switched off during configuration and Sensoface is also disabled.

Note: For confirmation a Sensoface is displayed after a calibration setting.

Note: Sensocheck should be switched off when a fast response time

) is required.

Troubleshooting

Table 16 Error descriptions

Display Problem Description

Make sure that the correct sensor is installed and that it is operating correctly.

Sensor is

defective

Temperature

error

Check sensor connection or replace cables. Make sure that there are no Polarization effects at

the sensor. Refer also to Err 33, Table 17. Make sure that the measured temperature is within

the range of the temperature compensation table (temperature compensation, concentration, salinity).

10.3 Error codes

Table 17 describes transmitter errors and parameter-specific errors.

Table 17 Error codes

Code Description Corrective action

Make sure that the entered cell constant is correct.

Make sure that the range setting is correct.

ERR 01

ERR 02

measured value flashes; the sensor is not operating properly

measured value flashes; the measured conductance is > 3500 mS

Make sure that the SAL value is < 45 ‰ (parts per thousand).

Test the sensor connection or replace cables.

Make sure that the correct USP limit was entered

Make sure that the conductance range is <3500mS

Troubleshooting

Table 17 Error codes (continued)

Code Description Corrective action

Test the temperature sensor wiring.

Make sure that the correct temperature sensor was selected in the configuration menu. For Hach GLI 3400 series sensors use Pt1000.

Measure the resistance of the temperature sensor in the sensor to make sure of a correct reading. For Hach GLI 3400 series sensors, the resistance between blue and white wires should be 1089 to 1106 ohms at 23–27 °C.

Measure the loop power supply voltage to the transmitter.

Make sure that the 4–20 mA output range settings cover a wide enough range and are correct (see section 5.2.2

on page 39).

ERR 03

ERR 11

ERR 12

ERR 13

Temperature sensor icon flashes; open or short circuit; temperature range exceeded

Current output icon flashes; current is below 3.8 mA

Current output icon flashes; current is above 20.5 mA

Current output icon flashes; reading range value set too large or too small

Troubleshooting

Table 17 Error codes (continued)

Code Description Corrective action

Make sure that the correct sensor is installed and that it is operating correctly.

Check sensor connection or replace cables.

Make sure that there are no Polarization effects at the sensor.

Make sure that the temperature is within the range of the temperature compensation table (temperature compensation, concentration, salinity).

Reconfigure and calibrate the device.

Return to the factory for repair and calibration.

ERR 33

ERR 98

ERR 99

Sensocheck icon flashes; Sensoface icon active (see

section 10.2)

Temperature icon flashes; Sensoface icon active (see

section 10.2)

CONF flashes; configuration or calibration data is defective. Memory error in the program.

FAIL flashes; EEPROM or RAM defective

10.4 Diagnostic tests

Function Description

View the output current

View calibration data

From the measuring mode, press current will show in the main display for five seconds, then return to measuring mode.

From the measuring mode, press ‘0000’. The cell constant will show in the main display. After 20 seconds, the transmitter will return to the measuring mode, or press measuring mode.

ENTER to return immediately to the

ENTER. The output

CAL and enter passcode

Troubleshooting

10.4 Diagnostic tests (continued)

Function Description

CONF and enter passcode

ENTER to return

CONF and enter passcode

RIGHT ARROW key.

UP ARROW key.

CONF, then ENTER to return to

View sensor monitor

View the last error message

Specify output current

From the measuring mode press ‘2222’ for the validation of the sensor and a complete measured-value processing. The measured resistance is shown in the main display and the measuring temperature is shown in the lower display. Press immediately to the measuring mode.

From the measuring mode, press ‘0000’. The last error message will show for 20 seconds, or

ENTER to return immediately to the measuring mode.

press After viewing the error, the message will be deleted.

From the measuring mode, press ‘5555’. The measured current will show in the secondary display. The output current in the main display can be modified.

To change the output current:

1. Select the current value with the

2. Edit the number using the

3. Press

ENTER to confirm. The entered value will show in

the secondary display. The transmitter will remain in Hold mode.

4. To exit Hold mode, press measuring mode.

Troubleshooting

Section 11 Replacement parts

11.1 si792 transmitter versions

Description Catalog number

Standard versions—default set for Hach 3400 sensors (not available in EU)

si792 C, contacting conductivity, CID2 LXV501.99.70012 si792x C, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.70112 si792x C-PA, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.76112 si792x C-FF, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.77112

EU versions—default set for sensors with PT100 (available in EU only)

si792 C, contacting conductivity, CID2 LXV501.99.70002 si792x C, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.70102 si792x C-PA, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.76102 si792x C-FF, contacting conductivity, CID1; ATEX Zone 1 LXV501.99.77102

11.2 Accessories

Description Catalog number

Installation Kit, si792, LZY486 Rear Housing, si792, LZY487 Panel-Mount Installation Kit, si792 LZY484 Pipe-Mount Installation Kit, si792 LZY483 Protective Hood, si792 LZY485 User Manual, si792 C contacting conductivity, English DOC026.52.00795 Complete Documentation CD, si792 series DOC086.98.00794

11.3 Replacement parts

Description Catalog number

Installation Kit, si792, LZY486 Rear Housing, si792, LZY487

Replacement parts

Section 12 Contact information

HACH Company World Headquarters

P.O. Box 389 Loveland, Colorado 80539-0389 U.S.A. Tel (800) 227-HACH (800) 227-4224 (U.S.A. only) Fax (970) 669-2932 orders@hach.com www.hach.com

Repair Service in Latin America, the Caribbean, the Far East, Indian Subcontinent, Africa, Europe, or the Middle East:

Hach Company World Headquarters, P.O. Box 389 Loveland, Colorado, 80539-0389 U.S.A. Tel +001 (970) 669-3050 Fax +001 (970) 669-2932 intl@hach.com

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

Repair Service in the United States:

HACH Company Ames Service 100 Dayton Avenue Ames, Iowa 50010 Tel (800) 227-4224 (U.S.A. only) Fax (515) 232-3835

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 GES. MBH

Industriestraße 12 A-3200 Obergrafendorf Tel. +43 (0)27 47 74 12 Fax +43 (0)27 47 42 18 info@hach-lange.at www.hach-lange.at

Repair Service in Canada:

Hach Sales & Service Canada Ltd. 1313 Border Street, Unit 34 Winnipeg, Manitoba R3H 0X4 Tel (800) 665-7635 (Canada only) Tel (204) 632-5598 Fax (204) 694-5134 canada@hach.com

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

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

Contact information

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 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 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 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 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 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 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

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.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 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

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

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

Contact information

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

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 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

Section 13 Warranty, liability and complaints

The manufacturer warrants that the product supplied is free of material and manufacturing defects and undertakes the obligation to repair or replace any defective parts at zero cost.

The warranty period for instruments is 24 months. If a service contract is taken out within 6 months of purchase, the warranty period is extended to 60 months.

With the exclusion of the further claims, the supplier is liable for defects including the lack of assured properties as follows: all those parts that can be demonstrated to have become unusable or that can only be used with significant limitations due to a situation present prior to the transfer of risk, in particular due to incorrect design, poor materials or inadequate finish will be improved or replaced, at the supplier's discretion. The identification of such defects must be notified to the supplier in writing without delay, however at the latest 7 days after the identification of the fault. If the customer fails to notify the supplier, the product is considered approved despite the defect. Further liability for any direct or indirect damages is not accepted.

If instrument-specific maintenance and servicing work defined by the supplier is to be performed within the warranty period by the customer (maintenance) or by the supplier (servicing) and these requirements are not met, claims for damages due to the failure to comply with the requirements are rendered void.

Any further claims, in particular claims for consequential damages cannot be made.

Consumables and damage caused by improper handling, poor installation or incorrect use are excluded from this clause.

The manufacturer process instruments are of proven reliability in many applications and are therefore often used in automatic control loops to provide the most economical possible operation of the related process.

Warranty, liability and complaints

To avoid or limit consequential damage, it is therefore recommended to design the control loop such that a malfunction in an instrument results in an automatic change over to the backup control system; this is the safest operating state for the environment and the process.

Warranty, liability and complaints

Appendix A Calibration solutions

Table 18 Potassium chloride solutions (conductivity in mS/cm)

Temperature

°C °F 0.01 mol/L 0.1 mol/L 1 mol/L

0 32 0.776 7.15 65.41

5 41 0.896 8.22 74.14 10 50 1.02 9.33 83.19 15 59 1.147 10.48 92.52 16 60.8 1.173 10.72 94.41 17 62.6 1.199 10.95 96.31 18 64.4 1.225 11.19 98.22 19 66.2 1.251 11.43 100.14 20 68 1.278 11.67 102.07 21 69.8 1.305 11.91 104 22 71.6 1.332 12.15 105.94 23 73.4 1.359 12.39 107.89 24 75.2 1.386 12.64 109.84 25 77 1.413 12.88 111.8 26 78.8 1.441 13.13 113.77 27 80.6 1.468 13.37 115.74 28 82.4 1.496 13.62 29 84.2 1.524 13.87 30 86 1.552 14.12 31 87.8 1.581 14.37 32 89.6 1.609 14.62 33 91.4 1.638 14.88 34 93.2 1.667 15.13 35 95 1.696 15.39 36 96.8 15.64

Data source: K. H. Hellwege (Editor), H. Landolt, R. Börnstein: Zahlenwerte und

Funktionen ..., volume 2, part. volume 6

Concentration

Calibration solutions

Table 19 Sodium chloride solutions (mS/cm)

Temperature Concentration

°C °F

0 32 0.631 5.786 134.5 1 33.8 0.651 5.965 138.6 2 35.6 0.671 6.145 142.7 3 37.4 0.692 6.327 146.9 4 39.2 0.712 6.51 151.2 5 41 0.733 6.695 155.5 6 42.8 0.754 6.881 159.9 7 44.6 0.775 7.068 164.3 8 46.4 0.796 7.257 168.8

9 48.2 0.818 7.447 173.4 10 50 0.839 7.638 177.9 11 51.8 0.861 7.831 182.6 12 53.6 0.883 8.025 187.2 13 55.4 0.905 8.221 191.9 14 57.2 0.927 8.418 196.7 15 59 0.95 8.617 201.5 16 60.8 0.972 8.816 206.3 17 62.6 0.995 9.018 211.2 18 64.4 1.018 9.221 216.1 19 66.2 1.041 9.425 221 20 68 1.064 9.631 226 21 69.8 1.087 9.838 231 22 71.6 1.111 10.047 236.1 23 73.4 1.135 10.258 241.1 24 75.2 1.159 10.469 246.2 25 77 1.183 10.683 251.3 26 78.8 1.207 10.898 256.5 27 80.6 1.232 11.114 261.6 28 82.4 1.256 11.332 266.9

0.01 mol/L

0.1 mol/L

Saturated

Calibration solutions

Table 19 Sodium chloride solutions (mS/cm) (continued)

Temperature Concentration

°C °F

29 84.2 1.281 11.552 272.1 30 86 1.306 11.773 277.4 31 87.8 1.331 11.995 282.7 32 89.6 1.357 12.22 288 33 91.4 1.382 12.445 293.3 34 93.2 1.408 12.673 298.7 35 95 1.434 12.902 304.1 36 96.8 1.46 13.132 309.5

Data source: Test solutions calculated according to DIN IEC 746-3

Data source: K. H. Hellwege (Editor), H. Landolt, R. Börnstein: Zahlenwerte

und Funktionen ..., volume 2, part. volume 6

0.01 mol/L

0.1 mol/L1Saturated

Calibration solutions

Appendix B Concentration curves

B.1 Sodium chloride solution -01- NaCl

Refer to Figure 13 for the conductivity of sodium chloride solution at various concentrations and temperatures.

Figure 13 The concentration of sodium chloride solution -01- NaCl

(weight %)

Concentration curves

B.2 Hydrochloric acid -02- HCl

Refer to Figure 14 for the conductivity of hydrochloric acid (HCl) at various concentrations and temperatures.*

Figure 14 The concentration of hydrochloric acid -02- HCl (weight %)

* Source: Haase/Sauermann/Dücker; Z. phys. Chem. New Edition, Vol. 47

(1965)

Concentration curves

B.3 Sodium hydroxide solution -03- NaOH

Refer to Figure 15 for the conductivity of sodium hydroxide solution (NaOH) at various concentrations and temperatures.

Figure 15 The concentration of sodium hydroxide solution -03- NaOH

(weight %)

Concentration curves

B.4 Sulfuric acid -04- H2SO4.

Refer to Figure 16 for the conductivity of sulfuric acid at various concentrations and temperatures.*

Figure 16 The concentration of sulfuric acid -04- H2SO4 (weight %)

* Source: Darling; Journal of Chemical and Engineering Data; Vol.9 No.3, July

1964

Concentration curves

B.5 Nitric acid -05- HNO3.

Refer to Figure 17 for the conductivity of nitric acid at various concentrations and temperatures.*

Figure 17 The concentration of nitric acid -05- HNO3 (weight %)

* Source: Haase/Sauermann/Dücker; Z. phys. Chem. New Edition, Vol. 47

(1965)

Concentration curves

Appendix C Passcode editor

For applications requiring compliance to FDA 21 CFR Part 11, certain device functions must be protected with passcodes. Passcodes can be changed in the passcode editor. If passcode protection is not required, use the preset passcodes (Table 20).

To activate the passcode editor:

1. Press

2. Enter

3. Use the

4. Press

Display Function Default setting

Cal INFO Calibration information 0000 CAL CELL Calibration mode for si792x C-PA 1100 CAL SOL Calibration with standard solution CAL PROD Product calibration CAL RTD Temperature sensor adjustment 1015 CFG ERR Error information 0000 CFG CONF Configuration mode 1200 CFG SNSR MO Sensor monitor 2222 CFG OUT Current source 5555

CFG SPCL ST

NO SPCL ST

YES SPCL ST

CONF.

1989, the administrator passcode. The initial screen will show

for approximately 3 seconds, then proceed to the next function.

ARROW keys to change the passcode.

ENTER to proceed to the next function. Press CONF to exit

the passcode editor. Refer to Table 20 for default passcodes.

Table 20 Default passcode settings

0110

1105

Administrator passcode. Use select NO or YES

Do not change administrator passcode

Change administrator passcode

ARROW keys to

Press

ENTER to return to the default

passcode Press

CONF to exit the editor

Press

ENTER to accept the new

passcode

CONF to exit the editor

Press

1989

Passcode editor

1 Not available with si792x C-PA

Important Note: The passcode editor cannot be accessed without the administrator passcode. Record changes in a secure location. It is not possible to override this system if the passwords are lost. The unit must be exchanged. Contact technical support for assistance.

Hach-Lange SI792 C, SI792x C, SI792x C-FF, SI792x C-PA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Section 1 Specifications

Section 2 General information

2.1 Safety information

2.1.1 Use of hazard information

2.1.2 Precautionary labels

2.2 General product information

2.2.1 Product overview

2.2.2 FDA 21 CFR part 11 compliance (HART only)

2.2.2.1 Electronic signatures for si792(x) C transmitters

2.2.2.2 Audit trail for si792(x) C transmitters

Section 3 Installation

3.1 Hazardous location installation

3.2 Unpacking the transmitter

3.3 Mechanical installation

3.3.1 Transmitter assembly

3.3.2 Mounting

3.3.2.1 Wall mount

3.3.2.2 Panel or pipe mount (optional)

3.4 Wiring Safety Information

3.5 Electrical installation

3.5.1 Wire preparation

3.5.2 Power and communication connections

3.5.2.1 si792(x) C (4-20 mA/HART) wiring

3.5.2.2 si792x C-FF and si792x C-PA wiring

3.5.3 Sensor wire connections

3.5.3.1 2-electrode (3400 and 810x series) sensor wiring

3.5.3.2 4-electrode sensor wiring

3.6 HART communication connection

Section 4 Interface and navigation

4.2 si792x C-FF and si792x C-PA interface

4.3 Display

5.1 Measure mode

5.2 Configuration

5.2.1 Output configuration

5.2.1.1 Concentration measurement

5.2.1.2 Time averaging filter

5.2.1.3 Output signal during errors

5.2.1.4 Output signal during HOLD

5.2.2 Temperature compensation configuration

5.2.3 Alarm settings

6.1 Configuration

6.1.1 Configuration steps

6.1.2 Configuration menu

6.2 Foundation Fieldbus communication

6.2.1 Standard resource block (RB)

6.2.2 Standard analog input block (AI)

6.2.2.1 Operating modes

6.2.2.2 Set the parameter and units

6.2.2.3 Data processing

6.2.2.4 Alarms

6.2.2.5 Bus parameters for the analog input block

6.2.2.6 Cyclic measured value status

6.2.3 Transducer block

6.2.4 Calibration via Foundation Fieldbus

7.1 Configuration

7.1.1 Configuration steps

7.1.2 Configuration menu

7.2 Profibus PA communication

Section 8 Calibration

8.1 Calibration

8.1.1 Enter cell constant

8.1.2 Calibration with a calibration solution

8.1.3 Calibration by comparison or grab sample

8.2 Temperature sensor adjustment

Section 9 Maintenance

9.1 Cleaning the instrument

9.2 Sensor maintenance

Section 10 Troubleshooting

10.1 Sensoface

10.2 Sensocheck

10.3 Error codes

10.4 Diagnostic tests

Section 11 Replacement parts

11.1 si792 transmitter versions

11.2 Accessories