Quick Start Guide
00825-0100-3960, Rev AB
Rosemount™ TF396
TUpHFET™ Combination pH Sensor
March 2020
Quick Start Guide March 2020
Essential instructions
Read this page before proceeding!
Emerson designs, manufactures, and tests its products to meet many national and international
standards. Because these instruments are sophisticated technical products, you must properly install,
use, and maintain them to ensure they continue to operate within their normal specifications. You
must adhere to the following instructions and integrate them into your safety program when
installing, using, and maintaining Emerson's 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 instrument, and warranty invalidation.
• Read all instructions prior to installing, operating, and servicing the product.
• If this Quick Start Guide is not the correct one, call 1-800-854-8257 or 949-757-8500 to request
the correct Quick Start Guide. Save this Quick Start Guide for future reference.
• 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 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. Look-alike
substitutions may result in fire, electrical hazards, or improper operation.
WARNING
Hazardous area installation
This sensor is not intrinsically safe or explosion-proof.
Installations near flammable liquids or in hazardous locations must be carefully evaluated by
qualified on-site safety personnel.
To secure and maintain an instrinsically safe installation, use an appropriate transmitter/safety
barrier/sensor combination.
The installation system must be in accardance with the governing approval agency (FM, CSA, or
BASEEFA/CENELEC) hazardous area classification requirements.
Consult your transmitter Reference Manual for details.
Proper installation, operation, and servicing of this sensor in a hazardous area installation is
entirely the operator's responsibility.
CAUTION
The wetted sensor materials may not be compatible with process composition and operating
conditions.
Application compatibility is entirely the operator's responsibility.
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Warranty
Seller warrants that the firmware will execute the programming instructiosn provided by Seller, and
that the Goods manufactured or services provided by Seller will be free from defects in materials or
workmanship under normal use and care until the expiration of the applicable warranty period. Goods
are warranted for twelve (12) months from the date of intial installation or eighteen (18) months from
the date of shipment by Seller, whichever period expires first. Consumables, such as glass electrodes,
membranes, liquid junctions, electrolyte, O-rings, catalytic beads, etc. and services are warranted for a
period of 90 days from the date of shipment or provision.
Products purchased by Seller for resale to Buyer ("Resale Products") shall carry only the warranty
extended by the original manufacturer. Buyer agrees that Seller has no liability for Resale Products
beyond making a reasonable commercial effeort to arrange for procurement and shipping of the
Resale Products.
If Buyer discovers any warranty defects and notifies Seller thereof in writing during the applicable
warranty period, Seller shall, at its option, promptly correct any errors that are found by Seller in the
firmware or Services, or repair or replace F.O.B. point of manufacture that portion of Goods or
firmware found by Seller to be defective, or refund the purchase price of the defective portion of the
Goods/Services.
All replacements or repairs necessitated by inadequate maintenance, normal wear and usage,
unsuitable power sources, unsuitable environmental conditions, accident, misuse, improper
installation, modification, repair, storage or handling, or any other cause not the fault of Seller are not
covered by this limited warranty, and shall be at Buyer's expense. Seller shall not be obligated to pay
any costs or charges incurred by Buyer or by any other party except as may be agreed upon in writing in
advance by an authorized Seller representative. All costs of dismantling, reinstallation and freight and
the time and expenses of Seller's personnel for site travel and diagnosis under this warranty clause shall
be borne by Buyer unless accepted in writing by Seller.
Goods repaired and parts replaced during the warranty period shall be in warranty for the remainder of
the original warranty period or ninety (90) days, whichever is longer. This limited warranty is the only
warranty made by Seller and can be amended only in a writing signed by an authorized representative
of Seller. Except as otherwise expressly provided in the Agreement, THERE ARE NO REPRESENTATIONS
OR WARRANTIES OF ANY KIND, EXPRESSED OR IMPLIED, AS TO MERCHANTABILITY, FITNESS FOR
PARTICULAR PURPOSE, OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS OR SERVICES.
Contents
Description and specifications......................................................................................................5
Install........................................................................................................................................... 7
Wire the sensor.......................................................................................................................... 19
Start up and calibrate................................................................................................................. 26
Maintenance.............................................................................................................................. 28
Return of material...................................................................................................................... 31
China RoHS table........................................................................................................................33
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1 Description and specifications
1.1 Features and applications
The ion-selective field effect transistor (ISFET) pH electrode provides a stable
pH measurement.
Its rate of response can be ten times faster than glass electrodes, enabling
better process control. Its short response time and increased stability at low
temperatures makes it suitable for use in cold processes like brine or water
for cooling. Aging effects caused by temperature fluctuations or large
changes of process pH are greatly reduced, providing longer intervals
between calibration and maintenance of the sensor.
Because there is no glass bulb, you can use the sensor in many applications
that restrict or prohibit pH glass electrodes due to the risk of broken glass
getting into the process. It may also provide longer sensor life in processes
that will break or crack pH glass bulbs. By allowing direct installation into the
process, costs for laboratory analysis of sample lines are greatly reduced.
The TUpH Reference technology includes a large area reference junction for
minimum maintenance requirements. The reference junction provides an
electrical connection between the reference electrode and the sample and
helps maintain a stable reference potential, regardless of the change in
sample pH. The TUpH reference electrode junction (the entire plastic tip
surrounding the ISFET electrode) maintains a steady reference signal, even
in dirty applications, by resisting plugging (a common cause of pH signal
drift). This large reference junction area (400 times greater than typical PTFE
or ceramic junctions) is made of micron-sized reference pathways, allowing
for ionic exchange, but preventing plugging by larger particles; the junction
continues to send a pH signal even in the dirtiest of applications. The fieldproven TUpH reference junction technology results in greatly reduced
maintenance requirements.
The TUpH helical reference pathway resists reference poisoning. Ions diffuse
through the reference pathways, and a charge is passed to the reference
element. The reference element must be protected from contamination by
poisoning ions such as sulfide, mercury, cyanide, and ammonia that will
cause reference drifts and offsets. The TUpH sensor's long internal reference
pathway hinders the contaminants' migration to the reference element
thereby providing an increased sensor life.
Emerson has specifically designed all TUpH sensor models for improved
performance in harsh, dirty, or abrasive applications where large quantities
or suspended solids are present.
The Rosemount TF396 offers a watertight sensor-to-cable connector that
prevents cable twisting and eliminates the need for rewiring when replacing
the sensor. The sensor cable includes an integral preamplifier cap with
mating connector and is compatible with most Rosemount transmitters.
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1.2 Specifications
Measurement range
Measuring element
Repeatability
Response time to pH
change
Wetted materials
Process connections
Temperature range
Pressure range
Minimum process
conductivity
Cable lengths
Weight/shipping
weight
2 to 12 pH
Ion-selective field effect transistor (ISFET)
±0.05 pH
99% in 30 seconds step change
Code -01: Polypropylene, EPDM, ryton, silicone
Code -02: 316 stainless steel, titanium,
polypropylene, EPDM, ryton, silicone
Code -01: 1-in. (25.4 mm) male national pipe
threads (MNPT), front and rear facing
Code -02: 2-in. (50.8 mm) Tri-Clamp connection
32 to 212 °F (0 to 100 °C) at 50 psig (344.7 kPa
[abs])
-10 to 100 psig (32 to 790 kPa [abs]) at 122 °F
(50 °C)
75 µS/cm; nominal: 100 µS/cm
20 ft., 50 ft. (6.1 m, 15.2 m)
1 lb./2 lb. (0.45 kg/0.9 kg)
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2 Install
2.1 Unpack and inspect
WARNING
Buffer solution in the vinyl boot may cause skin or eye irritation.
CAUTION
Wet electrode tip at all times to maximize storage life.
CAUTION
Cable connection at back of sensor body is fragile.
Do not overtighten.
Procedure
1. Inspect the outside of the carton for any damage. If you detect
damage, contact the carrier immediately.
2. Inspect the hardware. Make sure all the items on the packing list are
present and in good condition. Notify the factory if any part is
missing.
Postrequisites
If the sensor appears to be in satisfactory condition, proceed to .
Note
Save the original packing cartons and materials as most carriers require
proof of damage due to mishandling, etc. Also, if you need to return the
sensor to the factory, you must pack it in the same manner as it was
received. Refer to for return instructions. If storing the sensor, fill the vinyl
boot with pH buffer solution and replace it on the sensor tip until you are
ready to use it.
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2.2 Mount
Emerson has designed the sensor to be located in industrial process
environments.
Do not exceeed temperature and pressure limitations at any time. A caution
label regarding this matter is attached to the sensor. Please do not remove
this label. See Figure 2-1.
WARNING
Internal electrolyte fill solution may cause skin or eye irritation.
CAUTION
Cable connection at back of sensor body is fragile.
Do not overtighten.
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Figure 2-1: Dimensional Drawing
A. Connection, preamp cap adapter with cable. PN 23991-02/03
B. 1-in. MNPT (two places)
C. 1-in. wrench opening
D. Reference
E. Electrode
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Quick Start Guide March 2020
WARNING
Pressurized spray injury
US and foreign patents pending.
Do not exceed pressure and temperature specifications. From 32 to 122
°F (0 to 50 °C): maximum pressure: 100 psig (790 k Pa). From 122 to 212
°F (50 to 100 °C): maximum pressure: 50 psig (345 kPa).
Remove pressure and allow to cool before removal.
Read and follow manual.
In most cases, you can simply install the pH sensor as shipped and obtain
readings with an accuracy of ±0.6 pH. To obtain greater accuracy or to verify
proper operation, calibrate the sensor as a loop with its compatible
transmitter.
2.2.1 Flow through and insertion mounting
The sensor has a 1-in. MNPT process connection at the front of the sensor for
mounting into a 1½-in. tee or the process pipes.
See Figure 2-1 through Figure 2-8 for installation configurations.
Note
Do not use large pipe wrenches to tighten the sensor into a flange or other
type of mounting.
Figure 2-2: Flow-Through Tee with Adapter (PN 915240-xx*)
A. Adapter retrofit PN 33211-00.
B. O-ring must be in place prior to use.
C. Process connection threads: two places.
D. 2-in. (50.8 mm) scheduled 80 "T".
E. Sensor cable with connector - not shown.
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xx* Process connection threads
03 ¾ in.
04 1 in.
05 1½ in.
Figure 2-3: Flow-Through and Insertion Installations
A. Straight flow shown
B. 1½-in. pipe tee with reducing bushing PN 2002011
C. Pipe "Y" installation shown
D. 1½-in. Pipe "Y" (by others)
E. 1½-in. x 1 in. reducing bushing PN 933044
F. Flow
G. 1½-in. pipe tee with reducing bushing PN 2002011
H. 1½-in. x 1-in. reducing bushing
I. Angle flow shown
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