Tek-Trol TEK-BAR 3120B Series User manual

Technology Solutions
TAR 3120B
EK-B
Instruction Manual
Smart Gauge Pressure Transmitters
Document Number: IM-3120B
www.tek-trol.com

© COPYRIGHT Tek-Trol LLC 2019
NOTICE
Read this manual before working with the product. For personal and system safety, and for optimum
product performance, make sure you thoroughly understand the contents before installing, using, or
maintaining this product.
For technical assistance, contact
Customer Support
796 Tek-Drive
Crystal Lake, IL 60014
USA
Tel: [phone]
www.tek-trol.com
No part of this publication may be copied or distributed, transmitted, transcribed, stored in a
retrieval system, or translated into any human or computer language, in any form or by any means,
electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express
written permission. The information contained in this manual is subject to change without notice.

Table of Contents
Table of Contents ................................................................................................................................. 1
1Safety Instructions ......................................................................................................... 3
1.1 Intended Use .....................................................................................................................3
1.2 Certification.......................................................................................................................3
1.3 Safety Instructions from the Manufacturer .........................................................................3
Disclaimer................................................................................................................................ 3
Product Liability and Warranty ............................................................................................... 3
Information Concerning the Documentation.......................................................................... 3
Safety Precautions................................................................................................................... 4
1.4 Packaging, Transportation, and Storage..............................................................................5
................................................................................................................................. 5
Transportation......................................................................................................................... 5
Storage .................................................................................................................................... 6
1.5 Nameplate.........................................................................................................................6
2Product Description ....................................................................................................... 7
2.1 Introduction ......................................................................................................................7
2.2 Measurement Principle ......................................................................................................7
2.3 Specifications.....................................................................................................................8
General Specifications............................................................................................................. 8
Damping Time ......................................................................................................................... 8
Environmental Conditions....................................................................................................... 8
Power Supply........................................................................................................................... 9
Measuring Range Limit for Tek-Bar 3120B.............................................................................. 9
2.4 Dimensional Drawings .......................................................................................................9
2.5 Model Chart.....................................................................................................................10
3Installation................................................................................................................... 11
3.1 Selecting the Installation Location ....................................................................................11
3.2 Installation Procedure......................................................................................................11
Install Pressure Transmitter .................................................................................................. 11
Process Connections .............................................................................................................12
Housing Rotation................................................................................................................... 13
Terminal Side of Transmitter ................................................................................................ 13
LCD Display............................................................................................................................ 13
Conduit Installation...............................................................................................................14
3.3 Mounting Requirements ..................................................................................................14
Liquid Flow Measurement .................................................................................................... 14
Gas Flow Measurement ........................................................................................................15
Steam Flow Measurement ....................................................................................................15
3.4 Field Adjustment .............................................................................................................16
Zero Point Adjustment ..........................................................................................................16
Full Span Adjustment ............................................................................................................ 16
3.5 Product Usage .................................................................................................................16
Pipeline pressure measurement-pressure transmitter......................................................... 16
Pipeline pressure measurement-differential pressure transmitter...................................... 16
Steam flow measurement..................................................................................................... 17

Liquid flow measurement .....................................................................................................17
Air flow measurement...........................................................................................................17
Open container level measurement-single flange level transmitter ....................................17
Sealed container level measurement-single flange level transmitter ..................................17
4Electrical Connections .................................................................................................. 18
4.1 Grounding of Measuring Device .......................................................................................18
4.2 Power Supply Specifications and Connection ....................................................................19
4.3 Cable Protection System ..................................................................................................20
Standard Protection System.................................................................................................. 20
Explosion-proof Tube Protection System.............................................................................. 21
Connection to the HART Handheld Communicator .............................................................. 21
5Operation .................................................................................................................... 22
5.1 Local Operation and Display.............................................................................................22
5.2 Operation in safe and hazardous area ..............................................................................22
5.3 Configuration...................................................................................................................22
Key Operation ....................................................................................................................... 23
Factory Reset......................................................................................................................... 23
Factory Reset......................................................................................................................... 23
5.4 Handheld Communicator .................................................................................................27
6Maintenance................................................................................................................ 28
6.1 Hardware Maintenance ...................................................................................................28
Test Terminal......................................................................................................................... 28
Disassembling the Electronics Housing.................................................................................28
External Cleaning................................................................................................................... 28
Depot Repair ......................................................................................................................... 29
Discard Disposal ....................................................................................................................29
7Troubleshooting........................................................................................................... 30
7.1 Symptoms and Corrective Measures.................................................................................30
7.2 Tek-Bar 3120B Smart Gauge Pressure Transmitter LCD Display error codes........................32

1 Safety Instructions
1.1 Intended Use
Tek-Bar 3120B is a Smart Gauge Pressure Transmitter used for pressure, flow, level and
density measurement of steam and liquids.
The manufacturer is not liable for damage caused by improper or non-designated use.
1.2 Certification
Tek-Bar 3120B has ^ approval (Class I Div. I)
1.3 Safety Instructions from the Manufacturer
Disclaimer
The manufacturer will not be held accountable for any damage that happens by using its
product, including, but not limited to direct, indirect, or incidental and consequential
damages.
Any product purchased from the manufacturer is warranted in accordance with the
relevant product documentation and our Terms and Conditions of Sale.
The manufacturer has the right to modify the content of this document, including the
disclaimer, at any time for any reason without prior notice, and will not be answerable in
any way for the possible consequence of such changes.
Product Liability and Warranty
The operator shall bear authority for the suitability of the device for the specific
application. The manufacturer accepts no liability for the consequences of misuse by the
operator. Wrong installation or operation of the devices (systems) will cause the warranty
to be void. The respective Terms and Conditions of Sale, which forms the basis for the
sales contract shall also apply.
Information Concerning the Documentation
To prevent any injury to the operator and damage to the device it is essential to read the
information in this document and read the applicable national standard, and safety
instruction. These operating instructions contain all the information that is required in
various stages, like product identification, incoming acceptance and storage, to mounting,
connection, operation and commissioning through to troubleshooting, maintenance and
disposal.

Safety Precautions
You must read these instructions carefully prior to installing and commissioning the
device. These instructions are an important part of the product and must be kept for
future reference. Only by observing these instructions, optimum protection of both
personnel and the environment, as well as safe and fault-free operation of the device can
be ensured.
For additional information that are not discussed in this manual, contact the
manufacturer.
Warnings and Symbols Used
The following safety symbol marks are used in this operation manual and on the
instrument.
WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.
NOTE
Indicates that operating the hardware or software in this manner may damage it or
lead to system failure.

1.4 Packaging, TransporƚĂƟŽn, and Storage
This secƟon contains informaƟon regarding packaging, transportaƟon, and storage.
Packaging
The original package consists of
1. Tek-Bar 3120B Smart Gauge Pressure TransmiƩer
2. Accessories (opƟonal)
3. DocumentaƟon
NOTE
Unpack and check the contents for damages or signs of rough handling. Report
damage to the manufacturer immediately. Check the contents against the packing
list provided.
TransportaƟon
xAvoid impact shocks to the device and prevent it from geƫng wet during
transportaƟon.
xVerify local safety regulaƟons, direcƟǀĞƐ and company procedures with respect to
hoisƟng, rigging, and transportaƟon of heavy equipment.
xTransport the product to the installaƟŽŶ site using the original manufacturer’s packing
whenever possible.

Storage
If this product is to be stored for a long period of time before installation, take the
following precautions:
xStore your product in the manufacturer’s original packing used for shipping.
xStorage location should conform to the following requirements:
oFree from rain and water
oFree from vibration and impact shock
oAt room temperature with minimal temperature and humidity variation
xBefore storing a used owmeter remove any uid from the owmeter line
completely. Properties of the instrument can change when stored outdoors.
1.5 Nameplate
The nameplate lists the order number and other important information, such as design
details and technical data.
NOTE
Check the device nameplate to ensure that the device is delivered according to
your order. Check for the correct supply voltage printed on the nameplate.
Class I, Division 1, Group A, B, C and D T6
Class II, Division 1, Group E, F, and G T80ºC
Class III
MC601726 IP66
Tek-Bar 3120B
Smart Pressure Transmitter
Model: Tek-Bar 3120B-G-5-CSA-1-HC-1
Output: 4 to 20mA+HART Range: 0 to 1450 psig
Accuracy: ±0.075% F.S. Power: 16.5 to 55 VDC
SN.: F1911-130-008-6-S3217 Max W.P.: 2900 psi

2 Product Description
This section covers the reference and specification data, as well as ordering information.
2.1 Introduction
Tek-Bar 3120B single crystal silicon pressure transmitter utilizes ǁŽƌůĚƐ leading mono
crystal silicon pressure sensor technology and outstanding encapsulation technology. It can
handle the most rigorous industrial applications and it can cope up with extreme chemical,
mechanical and electrical working conditions. Highly accurate and reliable measurement
of level, density and pressure of liquid, gases or steam is possible with Tek-Bar 3120B. The
performance accuracy is up to 0.075% of URL. This high-performance pressure transmitter
meticulously designed by Tek-Trol supports HART communication protocol and IP66
waterproof protection. It is well equipped with several features that facilitate easy
installation, start-up and minimum maintenance.
2.2 Measurement Principle
The Tek-Bar 3120B works on the principle of mono silicon technology. The pressure sensor
of the transmitter is located on the top of the metal body, away from the service fluid. This
enables mechanical and thermal isolation of the sensor from the fluid in service.
When pressure is applied on the diaphragm and the silicon piezoelectric sensor, they
become stressed and undergo a change in voltage resistance. This change in resistance is
directly proportional to the applied pressure, which is transferred to the transmitter body
using lead wires.
Built on semiconductor technology, the resistance change (piezoelectric effect) is notably
higher than exhibited in standard strain gauges. Therefore, the sensitivity of mono-
crystalline sensors is higher than the sensitivity of most other types.

2.3 SpeciĮcĂƟons
General SpeciĮcaƟons
Parameter DescripƟon
Pressure Type
Gauge Pressure
Accuracy
±0.075% F.S.
Diaphragm Materials
Hastelloy C
5
Stability
±0.2 % URL/5 year
Process ConnecƟon
±0.075% F.S.
WeƩed material
316LLSĂŶĚ,ĂƐƚĞůůŽLJ
Working Humidity
5 to 100%
Output Signal
MounƟng PosiƟon Effect
Apply to any posiƟon. Max value lower than 1.6 w.c.
(400 Pa) can be corrected by zero clearing funcƟon
InsulaƟon Resistance
шϮϬDɏĂƚϭϬϬs
Process ConnecƟon
¼" NPT Female
ŶĐůŽƐƵƌĞZĂƟŶŐ
NEMA 4X (IP66)
Weight (excluding KƉƟŽŶ Items)
3.43 lb (1.55kg)
TesƟng Standard
Damping Time
Parameter
DescripƟon
Damping ƟŵĞ
0-100s adjustable
Response ƟŵĞ
ч0.2 s
Start-up aŌer power oī
ч6 s
Environmental CondiƟŽŶƐ
Parameter
DescripƟon
Working temperature
-40 °F to 185 °F (-40 °C to 85 °C),
Storage temperature
-40 °F to 230 °F (-40 °C to 110 °C)
Media temperature
Silicon oil Įůůing: -40 °F to 248 °F (-40 °C to 120 °C)
Working humidity
5-100% RH at 104 °F
ProtecƟŽŶĐůĂƐƐ
IP66
IEC60770
CSA Class
ϰŵƚŽϮϬŵǁŝƚŚ,ZdΠŽŵŵƵŶŝĐĂƟŽŶ
;KƉƟŽŶĂůDŽĚďƵƐZ^ϰϴϱͿ

Power Supply
Parameter
DescripƚŝŽn
Power supply
10.5-55VDC (Hart: 16.5-55VDC)
Load resistance
0-2119 ɏfor working condiƚŝŽn, 250- 600 ɏfor HART protocol
Transmission
distance
<3281Ĩƚ
Power consumpƚŝŽn чϱϬϬ mW at 24VDC, 20.8 mA
Measuring Range Limit for Tek-Bar 3120B
Nominal
Value
Smallest
Calibrated Span
Lower Range Limit
(LRL)
Upper Range Limit
(URL) Overload
Limit
5psi 8 in.WC -14.5psi 5psi 145psig
36psi 2psi -14.5psi 36psi 580psig
145psi 7.25psi -14.5psi 145psi 870psig
435psi 22.25psi -14.5psi 435psi 2175psig
1500psi 72.5psi -14.5psi 1500psi 2900psig
3000psi 725psi 0psi 3000psi 11600psig
00psi 725psi 0psi 00psi 11600psig
2.4 Dimensional Drawings
00psi 5000psi 0psi 00psi 00psig

2.5 Model Chart
Example Tek-Bar 3120B-G 3WP 1HC 1BA Tek-Bar 3120B-G-3-WP-1-HC-1-BA
Series Tek-Bar 3120B-G Smart Gauge Pressure TransmiƩer
1
2
3
Range OpƟons
4
5
8
6
Approval RaƟng
WP
CSA
General Purpose NEMA 4X/IP66
Process ConnecƟons
1
X
½" NPT Male
Diaphragm Seal
Diaphragm Material HC Hastelloy C
Electrical ConnecƟons
1½" NPT Female
OpƟons
CC
FC
BA
TAG
Custom ĂůŝďƌĂƟŽŶ with 5 point ĂůŝďƌĂƟŽŶ ĞƌƟĮĐĂƚĞ &ĂĐƚŽƌLJ
ŽŶĮŐƵƌĂƟŽŶNo ĞƌƟĮĐĂƚĞ
Stainless Steel ƌĂĐŬĞƚ (Angle type) with SST Bolts
ƵƐƚŽŵƚĐŚŝŶŐof the Name Plate (Must ƐƉĞĐŝĨLJ on P.O.)
ϬƚŽϱƉƐŝŐ;ϰϬϭdƵƌŶĚŽǁŶĚũZĂŶŐĞͲϱƚŽϱϴƉƐŝŐͿ
ϬƚŽϯϲƉƐŝŐ;ϰϬϭdƵƌŶĚŽǁŶĚũZĂŶŐĞͲϭϰϱƚŽϯϲƉƐŝŐͿ
ϬƚŽϭϰϱƉƐŝŐ;ϰϬϭdƵƌŶĚŽǁŶĚũZĂŶŐĞͲϭϰϱƚŽϭϰϱƉƐŝŐͿ
ϬƚŽϰϯϱƉƐŝŐ;ϰϬϭdƵƌŶĚŽǁŶĚũZĂŶŐĞͲϭϰϱƚŽϰϯϱƉƐŝŐͿ
ϬƚŽϭϱϬϬƉƐŝŐ;ϰϬϭdƵƌŶĚŽǁŶĚũZĂŶŐĞͲϭϰϱƚŽϭϱϬϬƉƐŝŐͿ
ϬƚŽϯϬϬϬƉƐŝŐ;ϰϭdƵƌŶĚŽǁŶĚũZĂŶŐĞϬƚŽϯϬϬϬƉƐŝŐͿ
ϬƚŽϲϬϬϬƉƐŝŐ;ϴϭdƵƌŶĚŽǁŶĚũZĂŶŐĞϬƚŽϲϬϬϬƉƐŝŐͿ
ϬƚŽϭϬϬϬϬƉƐŝŐ;ϮϭdƵƌŶĚŽǁŶĚũZĂŶŐĞϬƚŽϭϬϬϬϬƉƐŝŐͿ

3 Installation
This section covers instructions on installation and commissioning. Installation of the device
must be carried out by trained, qualified specialists authorized to perform such works.
CAUTION
xWhen removing the instrument from hazardous processes, avoid direct contact
with the fluid and the meter
xAll installation must comply with local installation requirements and local
electrical code
3.1 Selecting the Installation Location
Prior to product installation, check the model, specifications and installation location for
the transmitter. The transmitter is designed to withstand severe environmental conditions.
However, follow the enlisted precautions while selecting the installation site to ensure
stable and accurate operation for years.
xAmbient Temperature
Avoid locations subjected to significant temperature gradient or wide temperature
ǀĂƌŝĂƚŝŽŶƐ /Ĩ ƚƌĂŶƐŵŝƚƚĞƌ ŝƐ ĞdžƉŽƐĞĚ ƚŽ ƌĂĚŝĂŶƚ ŚĞĂƚ ĨƌŽŵ ƉůĂŶƚƐ equipment, then
providing adequate thermal isolation and/or ventilation is desirable.
xAmbient Atmosphere
Avoid corrosive atmosphere while installing the transmitter. If it must be installed in a
corrosive atmosphere, then provide adequate ventilation and take the necessary
measures to prevent intrusion or stagnation of rain water in conduits.
xShock and Vibration
Although the transmitter is designed to withstand shock and vibrations, it is
recommended to select an installation site with minimum shock and vibration to avoid
device damage and improve measurement accuracy.
3.2 Installation Procedure
This section includes the information regarding installation of the transmitter for safe and
precise functioning. It provides the procedure and instruction for mounting, transmitter
functions, and installation for specific applications.
Install Pressure Transmitter
Direct installation or mounting bracket installation may be used depending on the
application and installation site requirement. Various mounting scenarios are illustrated
in sections below.

Process Connections
3.2.2.1 Straight Thread Connection
Picture 1 Picture 2
Picture 1: Ensure that the seal of head face gasket is effective by keeping the length of
the pressure transmitter thread longer than the depth of the thread.
Picture 2: Ensure that the seal of root gasket is effective by maintaining the length of
the pressure transmitter thread shorter than the depth of the thread.
3.2.2.2 Taper Thread Connection
Use tapered thread connections to make better seals. Sealing with Teflon tape or
sealant glue results in strong and leak resistant connections.
3.2.2.3 Flange Connection
Choose gasket according to the properties of the process medium and the
temperature range. Pay attention to the bolt balance lock
3.2.2.4 Clamp Connection

Choose gaskets that meet speciĮed standards to avoid excessive clamp locking and
squeezing gasket. Excessive locking of clamp may damage the sensing diaphragm and
cause measuring error.
NOTE
Engage process connecƟon with a minimum of 7 thread connecƟons and Ɵghten the
housing rotaƟon set screw to prevent it from rotaƟng
Housing RotaƟon
To ensure the visibility of LCD display
xLoosen the housing screw
xRotate housing to the desired angle up to 360o
xRe-ƟŐhten the housing screw
Terminal Side of TransmiƩer
Mount the transmiƩer in such a way that the terminal side is easily accessible to the
operator.
LCD Display
Display module is used in Įeld adjustment for parameter seƫngs and site cŽŶĮŐuraƟon
before starƟng the measurement process. The local 5-digit LCD displays important
parameters, which can be directly monitored at the measuring point. It enables the
operator to cŽŶĮŐure the device using the funcƟon matrix.
Display can be rotated 355°

Conduit InstallaƟŽŶ
Improper sealing of connecƟons may damage the transmiƩer due to excess moisture
accumulaƟon. Mount the transmiƩer with electrical housing posiƟoned downward so
that the excess of moisture is condensed and drained out from the casing. Secondly,
install wiring with a drip loop and ensure the boƩom of the drip loop is mounted lower
than the conduit connecƟŽns or the transmiƩer housing to avoid moisture accumulaƟon
in the housing.
NOTE
Conduit thread must be engaged with a minimum of 5 thread connecƟons
3.3 MouŶƟng Requirements
Impulse piping cŽŶĮŐuraƟŽŶ and transmiƩer posiƟŽŶ depends on speciĮc measurement
condiƟons. Follow the procedure below while installing transmiƩer for liquid, gases or
steam processes.
Liquid Measurement
xPlace the taps to the side of the line/pipe to prevent residue deposits on the
transmiƩer process isolators
xMount the transmiƩer beside or below the taps so gases can vent into the process
line
xMount drain/vent the valve upward to allow gases to vent

Gas Measurement
xPlace the taps in the top or side of the line
xMount the transmiƩer beside or above the taps so liquid will drain into the process
line
Steam Measurement
xPlace taps to the side of the line
xMount the transmiƩer below the taps to ensure that the impulse piping stays Įůůed
with condensate
xIn steam service above 250°F (121°C), Įůů impulse lines with water to prevent the
direct steam contact with the transmiƩer and to ensure accurate measurement at
start-up
NOTE
For steam or other higher temperature processes, ensure that the temperature at the
process connecƟon does not exceed the transmiƩer’s process temperature limits.

3.4 Field Adjustment
Perform field adjustments only after installing the transmitter at its final work location
otherwise the set parameters may drift due to jerks while transporting or handling.
Zero Point Adjustment
xFor sensor zero trim, ensure that the vessel is empty and there is no input medium
pressure on the diaphragm. The vessel should be applied a normal atmospheric
pressure. If applying external pressure to the transmitter make sure that the display
is sufficiently stabilized (after approximately 10 to 15 seconds), before initiating any
trim function.
xThere are 3 ways of ŵĂŬŝŶŐŝŶƉƵƚƉƌĞƐƐƵƌĞZĞƌŽ
¾AƉƉůLJĂZĞƌŽƉƌĞƐƐƵƌĞƐŽƵƌĐĞ;ŵĂŶĚĂƚŽƌLJĨŽƌĂďƐŽůƵƚĞƉƌĞƐƐƵƌĞŵŽĚĞůƐͿ
¾Apply equal pressure on both HP and LP ports (DP models only)
¾Open equalizing valve of manifolds installed and venting to atmospheric
pressure (applicable for Gauge & DP type models only)
xSensor zero trim can be performed using an external HHC (Handheld calibrator), PC
or PDA configurator, and/or using Zero/Span local push buttons provided on the
transmitter.
xUsing local push buttons set PV=0, refer to section 5.2.1 of this manual for detailed
instructions. If using an external HHT or HART® PC configurator, refer to the user
manual supplied by the third-party supplier.
Full Span Adjustment
xFor full span adjustment, ensure that the vessel is filled with process medium to the
maximum level.
xMaintain static pressure value within the minimum and maximum pressure range
xUsing local push buttons set output for lower and upper limit of the full scale i.e.
4mA and 20mA, refer to section 5.2 of this manual for detailed key operations.
The device is now ready for the real-time process measurement.
3.5 Product Usage
Pipeline pressure measurement-pressure transmitter
For high temperature steam measurements, pre-inject more than half-tube cooling
water in the condenser. Once the steam pipes are stable, gradually open the shut-off
valve to start measurement.
Pipeline pressure measurement-differential pressure transmitter
For high temperature steam measurement in a pipeline by differential pressure
transmitter, pre-inject cooling water into the guided pipe. Once the steam pipes are
stable, slowly open the shut-off valve and start measuring.

Differential pressure transmitters are commonly used for micro pressure measurement
of hydrostatic pressures such as filter and equipment leakage tests for improving
accuracy.
Steam flow measurement
For steam flow measurement, up-tilt the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to start
measurement. Periodically open the drain vent to clear the residual steam from guided
pipeline to improve the measurement accuracy.
Liquid flow measurement
For liquid flow measurement, tilt down the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to
start measurement. Periodically open the drain vent to clear the residual liquid, which
will improve the measurement accuracy.
Air flow measurement
For liquid flow measurement, up-tilt the guiding pressure tube by 45°. Ensure that
transmitter installation location is at lower level than that of the process pipeline. Pre-
inject cooling liquid into the guiding pressure tube. Slowly open the shut-off valve to start
measurement. Periodically open the drain vent to clear the residual gas from the guiding
pressure tube, which will improve the measurement accuracy.
Open container level measurement-single flange level transmitter
Verify the process medium compatibility in case of open container level measurement.
For accurate measurement, install the transmitter at a location where liquid level and
temperature fluctuations are minimal.
Sealed container level measurement-single flange level transmitter
Use a single flange diaphragm system for sealed container level measurement. Increase
the isolation tank and multiple shut-off valves. Periodically open the drain/vent valve to
clear off the residual gas and liquid in the guiding pressure tube for higher accuracy.

4 Electrical Connections
This section covers the all electrical connection requirement. Electrical connection of the
device must be carried out by trained, qualified specialists authorized to perform such work
by the installation site.
WARNING
xConnect all electrical cables when the power is switched off. If the device does
not have switch-off elements, then, overcurrent protection devices, lightning
protection and/or energy isolating devices must be provided by the customer.
xThe device must be grounded to a spot in accordance with regulations to
protect personnel against electric shocks.
NOTE
x
When using the measuring device in hazardous areas, installation must
comply with the corresponding national standards and regulations and the
Safety Instructions or Installation or Control Drawings.
4.1 Grounding of Measuring Device
xEnsure proper grounding at control cabinet and pressure transmitter.
xGround terminals are provided on the either sides (inside and outside) of the terminal
box. Either one of these terminals may be used for grounding the transmitter.
xUse shielded twisted pair cable to avoid ground loops.
xUse internal ground terminals for direct grounding.