Emerson Rosemount 385+ -02 User manual

Rosemount™ 385+
pH/ORP Sensors
Reference Manual
00809-0100-3386
Rev. AA
February 2019

hasgkas

Emerson designs, manufactures and tests its products to meet many national and international stan-
dards. Because these sensors are sophisticated technical products, you MUST properly install, use,
and maintain them to ensure they continue to operate within their normal specifications. The
following instructions MUST be adhered to and integrated into your safety program when installing,
using, and maintaining Rosemount products. Failure to follow the proper instructions may cause any
one of the following situations to occur: loss of life; personal injury; property damage; damage to this
sensor; and warranty invalidation.
• Read all instructions prior to installing, operating, and servicing the product.
• If you do not understand any of the instructions, contact your Emerson representative for
clarification.
• Follow all warnings, cautions, and instructions marked on and supplied with the product.
• Inform and educate your personnel in the proper installation, operation, and maintenance
of the product.
• Install your equipment as specified in the Installation Instructions of the appropriate
Reference Manual and per applicable local and national codes. Connect all products to
the proper electrical and pressure sources.
• To ensure proper performance, use qualified personnel to install, operate, update,
program, and maintain the product.
• When replacement parts are required, ensure that qualified people use replacement parts
specified by Emerson. Unauthorized parts and procedures can affect the product's
performance, place the safe operation of your process at risk, and VOID YOUR WARRANTY.
Third-party substitutions may result in fire, electrical hazards, or improper operation.
• Ensure that all equipment doors are closed and protective covers are in place, except when
maintenance is being performed by qualified persons, to prevent electrical shock and
personal injury.
The information contained in this document is subject to change without notice.
Essential nstructions
Read this page before proceeding!
Sensor/Process Application Compatibility
The wetted sensor materials may not be compatible with process composition and operating
conditions. Application compatibility is entirely the responsibility of the user.
CAUT ON
Hazardous Area nstallationN
This sensor is not ntrinsically Safe. or Explosion Proof. nstallations near flammable liquids or in hazardous
area locations must be carefully evaluated by qualified on site safety personnel.
To secure and maintain an intrinsically safe installation, an appropriate transmitter/safety barrier/sensor
combi nation must be used. The installation system must be in accordance with the governing approval
agency (FM, CSA or BASEEFA/CENELEC) hazardous area classification requirements. Consult your trans-
mitter instruc tion manual for details.
Proper installation, operation and servicing of this sensor in a Hazardous Area nstal lation is entirely the
responsibility of the user.
DANGER
WARN NG
Retractable sensors must not be inserted nor retracted when process pressures are in excess of 64 psig
(542kPa)

Contents
Section 1: Description and Specifications
1.1 Features and Applications ....................................................................................1
1.2 Performance and Specifications ...........................................................................2
1.3 Ordering nformation...........................................................................................3
1.4 Product Certifications..........................................................................................4
Section 2: nstallation
2.1 Unpacking and nspection ...................................................................................5
2.2 Mechanical nstallation ........................................................................................5
2.3 Electrical nstallation..........................................................................................10
Section 3: Startup and Calibration
3.1 Startup ..............................................................................................................17
3.2 pH Calibration Using Buffer Solutions or Grab Samples ......................................17
3.3 ORP Calibration .................................................................................................17
Section 4: Maintenance
4.1 Maintenance......................................................................................................19
4.2 Sensor Removal .................................................................................................19
4.3 pH Electrode Cleaning .......................................................................................20
4.4 Platinum Electrode Cleaning..............................................................................20
4.5 Sensor Tube Replacement (Code -02).................................................................21
Section 5: Diagnostics and Troubleshooting
5.1 Model 54/3081 pH Diagnostics..........................................................................25
5.2 Troubleshooting ................................................................................................25
5.3 Rosemount 1056/1057 SMART pH Diagnostics ..................................................26
Section 6: Accessories
6.1 Accessories........................................................................................................29
EC Declaration of Conformity ...............................................................................31
ntrisicallly Safe Sensor nstallation Drawing - FM ......................................33
Reference Manual Table of Contents
00809-0100-3386 February 2019
Tab e of Contents i

Table of Contents Reference Manual
February 2019 00809-0100-3386
ii Tab e of Contents

Section 1: Description and Specifications
• SMART enabled
• Retractable version allows removal and replacement under pressure without process shut-
down.
• Long-life, triple junction reference electrode provides longer service life in applications where
poisoning ions are present.
• Disposable tefzel and titanium design provides maximum chemical resistance and econom-
ical advantage where minimum troubleshooting and maintenance downtime are of prime
importance.
1.1 Features and Applications
The Rosemount 385+ Sensor measures the p or ORP (Oxidation Reduction Potential) of aqueous
solutions in pipelines, open tanks, or ponds. It is suitable for applications where a low cost,
industrial, disposable sensor is required. The combination electrode features a peripheral ceramic
junction. The triple junction reference cell provides longer life in processes containing sugar,
ammonia, chlorides, sulfides or other poisoning ions. The Rosemount 385+ body is constructed of
molded, chemically resistant Tefzel in two standard body versions.
The retraction version is housed in a titanium tube, with a plug-in style surface mount preamplifier
in a weatherproof junction box. It is designed for use with a standard 1-1/2 in. ball valve assembly
for process mounting where a separate sample stream is difficult or impossible to provide. The
entire installation process is accomplished without line depressurization and minimal process fluid
loss. Upon sensor removal, from the ball valve, maintenance and replacement is easy.
The insertion/submersion version has two body configurations: 25 ft (7.6 m) integral cable and
preamplifier; 15 ft (4.5) integral cable for use with remote preamplifier.
Description and Specifications 1
Reference Manual Description and Specifications
00809-0100-3386 February 2019

2 Description and Specifications
Description and Specifications Reference Manual
February 2019 00809-0100-3386
Table 1-2: Rosemount 385+ sensor specifications
Measured Range
p range 0 to 14 p , GP T ACCUGLASS
ORP range -1500 mV to 1500 mV
Maximum Pressure at Retraction or nsertion (ball valve version)
542 KPa abs (64 psig)
Maximum Process Pressure and Temperature
790 KPa abs (100 psig) at 100 °C (212 °F)
Temperature Compensation
(p only) 0 to 100°C (32 to 212°F)
Wetted Materials
Tefzel, titanium, EPDM, 316 SS and Teflon (Code 02), Viton, glass, ceramic and (ORP only) platinum.
Weight/Shipping Weight
Submersion/insertion 1.6 lb/2.8 lb (0.7 kg/1.25 kg)
Retraction 6 lb/11 lb (2.7 kg/5.0 kg)
Ball Valve 5 lb/10 lb (2.25 kg/4.5 kg)
Process Connections
With ball valve 1-1/2 in.
Without ball valve 1 in.
Cable Length
Code 02 Requires interconnecting cable P/N 9200273 (Unprepped) or P/N 23646-01 (Prepped)
Code 03 25 ft. Integral Cable
Code 04 15 ft. Integral Cable
1.2 Performance and Specifications
pH Range Option 10 Option 11
0-2 p 94% 94%
2-12 p 99% 97%
12-13 p 97% 98%
13-14 p 92% 98%
Table 1-1: Percent linearity over pH

Description and Specifications 3
Reference Manual Description and Specifications
00809-0100-3386 February 2019
1.3 Ordering nformation
Table 1-3: Rosemount 385+ ordering information
Model Sensor type
385+ pH/ORP Sensor
Body Configuration
02 Retractable with Sensor ead Junction Box, Preamplifier, and Process Connector (1)
03 Insertion/Submersion with Integral Preamplifier and 25 ft. (7.6m) Cable (1) (2)
04 Insertion/Submersion for use with Remote Preamplifier and 15 ft. (2)
Combination Electrode
10 p - GPLR Glass
11 igh p Glass
12 Platinum ORP
Typical Model Number: 385+-03-10
1. Preamplifier is SMART for pH op ions only. A s andard preamplifier is used wi h ORP sensors.
2. Firs ime ins alla ions require a 1 x 1 inch NPT Process Connec or (see accessories).

Description and Specifications Reference Manual
February 2019 00809-0100-3386
4 Description and Specifications
1.4 Product Certifications
Please see online certificates for further details.
IECEx
Sensors without preamp (p and ORP) – Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +60°C)
Sensors with preamp (p only) – Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +60°C)
Sensors with standard preamp (ORP only) – Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +80°C) or Ex ia IIC T5 Ga
(-20°C ≤ Ta ≤ +40°C)
Per standards IEC60079-0 : 2011, IEC 60079-11 : 2011
ATEX
Sensors without preamp (p and ORP) – II 1 G Ex ia IIC T4 Ga (-20 °C ≤ Ta ≤ +60 °C)
Sensors with SMART preamp (p only ) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +60 °C)
Sensors with standard preamp (ORP only) – II 1 G Ex ia IIC T4 Ga (-20˚C ≤ Ta ≤ +80˚C) or
II 1 G Ex ia IIC T5 Ga (-20˚C ≤ Ta ≤ +40˚C)
Per standards EN 60079-0: 2012+A11:2013, EN 60079-11:2012
FM
See online FM Certificate of Compliance for applicable sensor options:
Intrinsically Safe for use in Class I, II, and III, Division 1, Groups A, B, C, D, E, F, and G; Temperature
Class T6 Ta = -20 °C to +60 °C
Intrinsically Safe for use in Class I, Zone 0, AEx ia IIC T6 Ta = -20 °C to +60 °C
Nonincendive for use in Class I, Division 2, Groups A, B, C, and D; Temperature Class T6 Ta = -20 °C
to +60 °C
Suitable for use in Class II and III, Division 2, Groups E, F, and G; Temperature Class T6 Ta = -20 °C
to +60 °C azardous (Classified) Locations
IS/I,II,III/1/ABCDEFG/T6 Ta = 60°C - 1400332; Entity; I/0/AEx ia IIC/T6 Ta = 60 °C - 1400332; Entity;
NI/I/2/ABCD/T6 Ta = 60 °C; S/II,III/2/EFG/T6 Ta = 60 °C
Per standards 3600:1998, 3610:2010, 3611:2004, 3810:2005
CSA
See online CSA Certificate of Compliance for applicable sensor options:
Intrinsically Safe:
Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2, Groups
ABCD; Ambient temperature rating -20 °C to +60 °C; Ex ia IIC; T6
Intrinsically Safe and Non-Incendive:
Class I, Division 1, Groups ABCD; Class II, Division 1, Groups EFG; Class III; Class I, Division 2, Groups
ABCD; Ex ia IIC; T6; Ambient temperature rating -20 °C to +60 °C: (Simple Apparatus)
Per standards C22.2 No. 0-10, C22.2 No. 0.4-M2004, C22.2 No. 94-M1991, C22.2 No. 142 –
M1987, C22.2 No 157 – M1992, CAN/CSA E60079-0:07, CAN/CSA E60079- 11:02, UL50 11th
Ed, UL508 17th Ed, UL913 7th Ed, UL 60079-0: 2005, UL 60079-11: 2002

Insta ation 5
Section 2: nstallation
Reference Manual nstallation
00809-0100-3386 February 2019
2.1 Unpacking and nspection
Inspect the outside of the carton for any damage. If damage is detected, contact the carrier
immediately. Inspect the instrument and hardware. Make sure all items in the packing list are
present and in good condition. Notify the factory if any part is missing.
2.2 Mechanical nstallation
The Rosemount 385+ is available in two versions, the retraction version (Code 02) and the
insertion/submersion version (Code 03, & 04). Please refer to the appropriate section below.
2.2.1 Retraction Option (Code option 02)
The Rosemount 385+ sensor may be installed through a weldalet or in a pipe tee or “Y”, as shown
in Figure 2-1, when used with a ball valve. Insert the end of the sensor to a depth sufficient to ensure
that the glass bulb is continuously wetted by the process fluid.
The sensor can also be inserted directly into the process without the use of a ball valve for
applications not requiring continuous operation during sensor maintenance (Figure 2-2).
Allow sufficient room for safe retraction and insertion of the sensor. personnel should have room
for stable footing while performing removal or insertion of the sensor.
The sensor must be mounted within 10-90 degrees of the horizontal with the tip pointed
downward, thus keeping air bubbles out of the p sensitive glass bulb. Bubbles settled in the glass
bulb disrupt the electrical continuity between the p sensitive glass and the silver/silver chloride
measuring element.
If the retraction version is to be installed without a ball valve follow the installation procedure for
insertion service (Section 2.2.2). Perform the following steps for sensor installation through a ball
valve:
1. Carefully remove the liquid filled rubber boot which protects the glass electrode and keeps
the liquid junction wet during shipping and storage. Discard the liquid and boot. Make
sure the lubricated O-ring is in place in the groove inside the male connector on the sensor
body (Figure 4-1, item A).
WARN NG
Glass electrode must be wetted at all times (in storage and in line) to maximize sensor life.
Save the original packing cartons and materials as most carriers require proof of damage due to mishandling,
etc. Also, if it is necessary to return the instrument to the factory, you must pack the instrument in the same
manner as it was received. Refer to Section 6.0 for instructions.
NOT CE
Buffer solution, in the vinyl boot, may cause skin or eye irritation.
CAUT ON

6 Insta ation
nstallation Reference Manual
February 2019 00809-0100-3386
2. With the male connector on the sensor’s body, insert the sensor into the ball valve until it
gently touches the closed valve. The molded electrode guard will protect the glass bulb
from breakage.
3. Thread the male connector body tightly into the ball valve assembly. DO NOT tighten the
hex nut on the male connector body; doing so would not allow the sensor to be inserted
through the ball valve.
4. Pull back hard on the sensor assembly, as if trying to remove the sensor, to be certain that
the sensor cannot come free of the ball valve assembly. The built-in retraction stop will
butt against the shoulder of the male connector if properly installed.
5. After confirming that the sensor assembly is properly secured by the valve assembly, the
valve may be opened and the sensor positioned into the process at the desired depth and
orientation.
6. While holding the sensor in position, tighten the hex nut of the male connector to firmly
secure the sensor in place. When the hex nut is tightened, the Teflon ferrule inside the
compression fitting clamps the sensor tube. (See Figure 4-2.)
2.2.2 Submersion/Insertion Option
Code Option -03 & -04). Figure 2-3 and Figure 2-4. The Rosemount 385+ may be installed through
a weldalet or a pipe tee or “Y” when used with a process connector (P/N 23166-00-01).
For submersion service, a process connector (P/N 23166-00-01 or 9510066) may be used with a
water tight 1 in. schedule 80 CPVC or PVDF standpipe conduit. Refer to Figure 2-5. Tapered threads
in plastic tend to loosen after installation. It is therefore recommended that TEFLON tape be used
on the threads and that the tightness of the connection be checked frequently to assure that no
loosening has occurred. The sensor should be installed within 80° of vertical, with the electrode
facing down.
The sensor must be captured by the valve assembly and the male connector so that it cannot be blown free
by process pressure if mishandled during insertion or retraction.
CAUT ON
Over tightening the hex nut may damage the ferrule.
CAUT ON
A stainless steel ferrule is available if the TEFLON ferrule does not inadequately grip. When using the metallic
ferrule, care must be taken to avoid over tightening and damaging the sensor tube. f the male connector
leaks during insertion or retraction, replace the O-ring in the male connector.
NOT CE

Insta ation 7
Reference Manual nstallation
00809-0100-3386 February 2019
Figure 2-1: Typical Mounting Details-Retraction Version
Figure 2-2: Dimensional Drawing Retraction Version (Code 02)

8 Insta ation
nstallation Reference Manual
February 2019 00809-0100-3386
Figure 2-3: Dimensional Drawing Submersion/ nsertion Version (Code -03, -04)
Figure 2-4: Submersion Accessory (Code 03, 04)

Insta ations 9
Reference Manual nstallation
00809-0100-3386 February 2019
Figure 2-5: Submersion nstallations, Handrail Mounting Assembly (P/N 11275-01)

10 Insta ation
nstallation Reference Manual
February 2019 00809-0100-3386
2.3 Electrical nstallation
Make electrical connections as shown on Figures 2-6 through 2-14 using the following guidelines:
1. Pay particular attention to the analyzer or transmitter model number when following
details on the wiring diagrams to ensure that the connections are made to the proper
terminals.
2. Use Rosemount custom cable PN 9200273.
3. The maximum distance from the sensor to the analyzer is 15 ft without an integral
preamplifier.
4. Signal cable should be run in a dedicated conduit and should be kept away from AC power
lines.
For additional wiring information on this product, including sensor combinations not shown here,
please refer to the Liquid Transmitter Wiring Diagrams.
Figure 2-6: Rosemount 385+-02 Sensor Wiring to Rosemount 5081 Transmitter

Insta ation 11
Reference Manual nstallation
00809-0100-3386 February 2019
Figure 2-7: Rosemount 385+-03 Sensor Wiring to Rosemount 5081 Transmitter
Figure 2-8: Rosemount 385+-04 Sensor Wiring to Rosemount 5081 Transmitter

12 Insta ation
nstallation Reference Manual
February 2019 00809-0100-3386
Figure 2-9: Rosemount 385+-02 sensor Wiring to Rosemount 1056/56/1057 Transmitters
Figure 2-10: Rosemount 385+-03 Sensor Wiring to Rosemount 1056/56/1057 Transmitters

Insta ation 13
Reference Manual nstallation
00809-0100-3386 February 2019
Figure 2-11: Rosemount 385+-04 Sensor Wiring to Rosemount 1056/56/1057 Transmitters
Figure 2-12: Wiring Details - Submersion/ nsertion (Code 03 & 04)

nstallation Reference Manual
February 2019 00809-0100-3386
14 Insta ation
Figure 2-13: Wiring Rosemount 385+-02 Sensor to Rosemount 1055-11-22-32 through Remote
Junction Box
Figure 2-14: Wiring Retraction Version (Code-02)