Hach-Lange SI792 P, SI792x P, SI792x P-FF, SI792x P-PA User Manual
DOC026.52.00794
si792 P
si792x P
si792x P-FF
si792x P-PA
pH/ORP
2-Wire Transmitters
USER MANUAL
December 2007, Edition 1
© HACH Company, 2007. All rights reserved. Printed in Germany.
2
Table of Contents
Table of Contents ........................................................................ 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 P series transmitters .14
2.2.2.2 Audit trail for si792 P series transmitters....................14
2.3 Product models ........................................................................14
Section 3 Installation..............................................................15
3.1 Hazardous location control drawings .......................................16
3.2 Unpacking the transmitter ........................................................16
3.3 Mechanical installation............................................................. 17
3.3.1 Transmitter assembly........................................................17
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 P and si792x P (4–20 mA/HART) wiring ..........24
3.5.2.2 si792x P-FF and si792x P-PA wiring..........................25
3.5.3 Sensor wire connection.....................................................25
3.5.3.1 Hach combination pH/ORP sensors wiring................26
3.5.3.2 pH/ORP sensors with solution ground wiring.............27
3.5.3.3 Differential pH/ORP sensor wiring .............................28
3.6 HART communication connection............................................29
1
Table of Contents
Section 4 Interface and navigation..................................31
4.1 si792(x) P (4–20 mA/HART) interface......................................31
4.2 si792x P-FF and si792x P-PA interface ...................................32
4.3 Display......................................................................................33
Section 5 Operation—4–20 mA/HART............................35
5.1 Measure mode .........................................................................35
5.2 Configuration............................................................................35
5.2.1 Output configuration..........................................................36
5.2.1.1 Output range ..............................................................37
5.2.1.2 Time averaging filter...................................................37
5.2.1.3 Output signal during errors.........................................38
5.2.1.4 Output signal during HOLD........................................38
5.2.2 Temperature compensation configuration.........................39
5.2.3 Calibration mode configuration..........................................40
5.2.4 Alarm settings configuration..............................................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..................................62
Section 7 Operation—Profibus PA...................................63
2
Table of Contents
7.1 Configuration............................................................................63
7.1.1 Configuration steps ...........................................................63
7.1.2 Configuration menu...........................................................64
7.2 Profibus communication...........................................................65
Section 8 Calibration..............................................................69
8.1 Calibration................................................................................ 69
8.1.1 pH calibration ....................................................................69
8.1.1.1 Calibration with automatic buffer recognition .............70
8.1.1.2 Calibration with manual buffer entry........................... 71
8.1.1.3 Enter calibration data from calibrated probes ............72
8.1.1.4 Calibration by comparison— si792 (x) P (HART) and
si792x P-FF only.................................................................73
8.1.1.5 Zero adjustment for ISFET probes—For si792(x) P
(HART) and si792x P-FF only.............................................74
8.1.2 ORP calibration................................................................. 75
8.2 Temperature probe adjustment................................................77
Section 9 Maintenance...........................................................79
9.1 Cleaning the instrument ...........................................................79
9.2 Sensor maintenance ................................................................79
Section 10 Troubleshooting................................................81
10.1 Sensoface ..............................................................................81
10.2 Sensocheck............................................................................81
10.3 Error codes.............................................................................82
10.4 Calibration errors....................................................................84
10.5 Diagnostic functions............................................................... 86
Section 11 Parts and accessories.................................... 87
11.1 si792 P series versions ..........................................................87
11.2 Accessories............................................................................87
Section 12 Contact information.........................................89
Section 13 Limited warranty ...............................................92
Appendix A Buffer tables......................................................95
3
Table of Contents
Appendix B Passcode editor............................................103
Index................................................................................ ...............105
4
Section 1 Specifications
Specifications are subject to change without notice.
Transmitter
Composition PBT (polybutylene terephthalate)
Display LCD
Fittings
Power requirements—si792 P and
si792x P, (4–20 mA/HART)
Power requirements—FF and
Profibus PA
Loop current—si792 P and si792x P,
(4–20 mA/HART)
Current consumption—FF and
Profibus PA
Maximum current in case of fault
(FDE)—FF and Profibus PA
Measurement error
2
3 knockouts for M20 x 1.5 strain reliefs
2 knockouts for ½ inch NPT or rigid
metallic conduit
14–30 VDC (30 VDC maximum)
FISCO bus supply: 9 to 17.5 VDC
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
5
Specifications
si792 P 4–20 mA/HART transmitter:
US:
si792 P
FM listed for:
Class I, Division 2
si792x P; si792x P-FF; si792x P-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
Certification (may not apply to all
sensors. Refer to the control drawing or
listing for certification information for
the sensor that is used)
Note: Hach differential pH/ORP
sensors are not ATEX certified.
Power output for pHD sensor adapter
Output averaging time constant (HART) 0–120 seconds
Output span allowed pH: 2.00 to 18.00; mV: 200 to 3000
Storage temperature –20 to 70 °C (–4 to 158 °F)
Operating temperature –20 to 55 °C (–4 to 131 °F)
Weight Approximately 1 kg
Canada:
si792 P CSA certified to:
Class I, Division 2
si792x P CSA certified and
si792x P-FF; si792x P-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 P; si792x P-FF;
si792x P-PA
ATEX Certification:
II 2 (1) G EEx ib (ia) IIC T6
EU: CE Marked to:
EMC Directive 2004/108/EC
ATEX Directive 94/ 9/EC
Enclosure: IP65
+3 V/0.5 MA –6 V/0.5 mA (5.0 to 5.2 V,
maximum 640 µA)
6
Data retention
Passcodes
Sensocheck
Sensor monitor
Communications
HART communication
Foundation Fieldbus (FF_H1)
Specifications
Parameters and calibration data
>10 years (EEPROM)
Modifiable according to FDA 21 CFR
Part 11 “Electronic Signatures”
(HARTonly)
Sensocheck automatic monitoring of
glass and reference electrode (can be
disabled). Delay: 30 seconds.
Direct display of measured values from
sensor for validation (electrode
potential/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 (switchable: pH, ORP,
temperature, R
asymmetry potential)
Execution time: 50 ms
Certified to ITK 4.6
Physical interface: to IEC 1158-2
Address range: 017 to 246
glass
, R
, slope,
ref
7
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-P A (DPV1)
Temperature input
Probe
Range, Pt100/Pt1000
Range, NTC 300 Ω –20.0 to 110.0 °C (–4 to 230 °F)
Resolution 0.1 °C; 0.1 °F
Measurement error
Temperature compensation of sample
pH/ORP inputs
pH/ORP
Glass/reference electrode input
Input resistance—glass electrode
1,2
Profile for Process Control Devices,
Version 3.0
Physical interface: MBP-IS
(Manchester Bus Powered–Intrinsically
Safe) to IEC 1158 -2 (DIN-EN 61158-2)
Connection: via segment coupler to
SPC, PC, PCS
Address range: 1 to 126
Pt100/PT1000/NTC 300 Ω (selectable),
2-wire connection
si792 P; si792x P; si792x P-FF:
–20.0 to 200.0 °C (–4 to 392 °F)
2x P-PA:
si79
–20.0 to 150.0 °C (–4 to 302 °F)
<0.5 K
(<1 K for Pt100; <1 K for NTC >100 °C)
Linear –19.99 to 19.99%/K
(25 °C reference temperature)
Input for Combination or Differential
pH/ORP Sensors
IEC 746 Part 1, at nominal operating
conditions
12
>0.5 x 10
Ω
8
Specifications
Input resistance—reference electrode
Input current—glass electrode
Input current—reference electrode
Measurement range –1500 to 1500 mV
Measurement error—pH
Measurement error—mV
1,2
1,2
Display range—pH –2.00 to 16.00 pH units
Display range—ORP –1999 to 1999 mV
pH sensor calibration
Offset range ± 60 mV
Slope range 85 to 103% (47.5 to 61 mV/pH unit)
Calibration timer 0 to 9999 hours
ORP sensor calibration (si792 P, si792x P and si792x P-FF only)
Calibration range –700 to 700 mV
Calibration timer 0 to 9999 hours
1
(± 1 count plus sensor error)
2
IEC 746 Part 1, at nominal operating conditions
10
–12
–10
Ω
A
A
>1 x 10
<2 x 10
<1 x 10
<0.02 pH units plus sensor error;
TC: 0.002 pH/K
<1 mV plus sensor error; TC: 0.1 mV/K
9
Specifications
10
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.
11
General information
Electrical equipment marked with this symbol may not be d isposed 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 Pro ducer 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, ident ifie s a risk of chemical
harm and indicates that only individuals qualified and traine d t o work
with chemicals should handle chemicals or perform maintenance on
chemical delivery systems associated with the equipment.
This symbol, when noted on the product, ident ifies th e pr esence 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, ident ifies th e pr esence 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.
12
General information
2.2 General product information
2.2.1 Product overview
The si792 P series transmitters are used for pH/ORP and temperature
measurement in industry, environment, food processing and sewage
treatment. This manual describes the installation, operation and
maintenance for standard and EU models of the si792 P series
transmitters.
The molded transmitter enclosure can be attached to a panel, wall, post
or pipe railing. The optional hood (see Accessories on page 87)
provides protection against direct weather exposure and
mechanical damage.
Three communication protocols are available for the si792 transmitter:
• 4–20 mA/HART—Models si792(x) P, includes the si792 P and
si792x P models
• Foundation Fieldbus—si792x P-FF
• Profibus PA—si792x P-PA
This user manual includes instructions for all three protocols.
Important Note: An ‘x’ in the model number is an indication of an
instriniscally safe (IS) instrument.
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
and section 2.2.2.2 make the transmitter compliant with the
requirements of FDA 21 CFR Part 11.
13
General information
2.2.2.1 Electronic signatures for si792 P series 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 B on page 103).
2.2.2.2 Audit trail for si792 P series transmitters
The si792 series 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.
2.3 Product models
The si792 P series instruments are programmed at the factory with
default settings for specific sensors and probes. The default settings,
chosen to accommodate regional safety standards, can be changed by
the user.
See Parts and accessories on page 87 for a list of instrument models.
14
Section 3 Installation
DANGER
Explosion hazard. The installation and commissioning of this
equipment must only be carried out by trained personnel.
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.
DANGER
Explosion hazard. pHD sensors (PDxxx and RDxxx) must have a
serial number greater than 0712431582 to be used in C1D1
hazardous locations. Check the serial number of the pHD sensor
before wiring the sensor to si792x P, si792x P-FF or
si792x P-PA instruments.
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 or listing applicable to the site location.
15
Installation
For outdoor installation, use of a protective hood or sunshield is
recommended (section 11.2 on page 87).
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.
3.1 Hazardous location control drawings
Before installation, review the applicable Hazardous Location Control
Drawings or ATEX EC-type Examination Certificates included with the
instrument and on the provided documentation CD. Follow all
regulations specified for the installation location.
Refer to the documentation CD for manuals provided in
other languages.
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
16
Installation
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)
3.3 Mechanical installation
3.3.1 Transmitter assembly
Refer to Figure 1 and the following instructions to assemble the
transmitter.
17
Installation
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 87).
18
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 S train relief or ½ i nch conduit opening
(2x) Ø 21.5 mm [0.85 in]
19
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.
20
Installation
3.5 Electrical installation
DANGER
Explosion hazard. Do not connect any components that are not
specified for the device. Always refer to the Hazardous Location
Control Drawing.
Prerequisites:
• Review the applicable control drawing or EC-type Examination
certificate.
• Review the electrical code regulations
• Review the regulations for electrical installations in hazardous
locations (e.g. EN 60079-10/EN 60079-14; 97/9/EC directive;
NEC; CEC; Profibus Technical Guidelines)
• 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 on page 22).
21
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
Cable shield connection
3
Note:
Do not connect to earth ground.
4 ESD shield removed 9 Removing terminal with screwdriver
5 Areas for screwdriver to pry terminal 10 Cable loop position in housing
8 Seat insulation against connector
22
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.
23
Installation
3.5.2.1 si792 P and si792x P (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.
Use Figure 4 and Table 1 to connect the power supply to the si792 P
and si792x P (4–20 mA/HART)..
Figure 4 si792(x) P wiring
1 Wiring terminals—see Table 1
Table 1 Terminal assignments—si792(x) P
TerminalNo. Assignment
14 4–20 mA output (–)
15 4–20 mA output (+)
2 HART connection (see warnings in
section 3.6 on page 29)
24
Installation
3.5.2.2 si792x P-FF and si792x P-PA wiring
Use Figure 5 and Table 2 to connect power and communication to the
si792x P-FF (Foundation Fieldbus) or si792x P-PA (Profibus).
Figure 5
1 Wiring terminals—see Table 2
Table 2 Terminal assignments—si792x P-FF and si792x P-PA
Terminal No. Assignment
14 Connection from FF or Profibus PA (–)
15 Connection from FF or Profibus PA (+)
si792x P-FF and si792x P-PA wiring
3.5.3 Sensor wire connection
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:
• Hachcombination pH/ORP sensors—section 3.5.3.1 on page 26
• pH/ORP solution ground sensors—section 3.5.3.2 on page 27
• pH/ORP differential sensors—
section 3.5.3.3 on pag e 28
25
Installation
3.5.3.1 Hach combination pH/ORP sensors wiring
1. Install the jumpers shown in Figure 6.
2. Use Table 3 to wire the sensor to the transmitter.
Figure 6 Wiring for Hach combination pH/ORP sensors
1 Jumper between terminal 4 and 5
2 Wiring terminals—see Table 3
Table 3 Terminal assignments—pH/ORP sensors
Terminal
Assignment
No.
1 Measure electrode
4 Reference electrode braided coaxial shield
Cable shield connection
3
Note:
Do not connect to earth ground.
Hach PC and RC
series color
coaxial cable center
wire
Six-plug
connection
coaxial cable center
wire
braided coaxial
shield
26
Installation
Table 3 Terminal assignments—pH/ORP sensors (Continued)
RTD (resistive temp
7
device)
RTD (resistive temp
8
device)
3.5.3.2 pH/ORP sensors with solution ground wiring
Use Figure 7 and Table 4 to wire the sensor to the transmitter.
red green
white white
Figure 7 Wiring for pH/ORP sensors with solution ground
2
1 Wiring terminals—see Table 4
Cable shield connection
Note:
Do not connect to earth ground.
27
Installation
Table 4 Terminal assignments—sensors with solution ground
TerminalNo. Assignment
1 Measure electrode
4 Reference electrode
5 Solution ground
7 RTD (resistive temperature device)
8 RTD (resistive temperature device)
3.5.3.3 Differential pH/ORP sensor wiring
Use Figure 8 and Table 5 on page 29 to wire the sensor to
the transmitter. The pHD sensor has 7 wires (2 shield wires). The LCP
sensor has 6 wires (1 shield wire).
Figure 8
1 Wiring terminals—see Table 5 on page 29
Wiring for differential pH/ORP sensors (PDXXX/RDXXX)
28
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