Kobold PAD Operating Manual

Operating Instructions

for

Smart Pressure Transmitter

Model: PAD

PAD

1. Contents

1. Contents ........................................................................................................ 2

2. Introduction ................................................................................................... 4

2.1 Using This Manual ............................................................................... 4

2.2 Overview of Transmitter ....................................................................... 5

2.3 Software Compatibility ......................................................................... 5

2.4 Transmitter Components ..................................................................... 6

3. Handling Cautions ....................................................................................... 10

3.1 Unpacking .......................................................................................... 11

3.2 Models and Specifications Check ...................................................... 11

3.3 Storage .............................................................................................. 11

3.4 Selecting the Installation Locations .................................................... 12

3.5 Performing Sensor Zero Trim after Installation .................................. 12

3.6 Pressure Connections ........................................................................ 13

3.7 Waterproofing of Cable Conduit Connections .................................... 13

3.8 Restrictions on Use of Radio Transceivers ........................................ 13

3.9 Insulation Resistance Test and Dielectric Strength Test .................... 14

3.10 Installation of Explosion Protected Type Transmitters ....................... 15

3.11 Notes on the machine and pressure equipment directive .................. 20

4. Transmitter Functions ................................................................................. 20

4.1 Overview ............................................................................................ 20

4.2 Safety Message ................................................................................. 20

4.3 Warning ............................................................................................. 21

4.4 Fail Mode Alarm ................................................................................. 21

4.5 EEProm-Write Enable / Disable Mode Switch ................................... 23

4.6 Configuration of Alarm and Security Jumper Procedures .................. 24

4.7 Configuration Using Zero and Span Push Buttons ............................ 24

4.8 Additional Functions (valid for PAD-F only) ....................................... 35

4.9 Wiring Connections for External HHT/ Ammeter ................................ 42

5. Installation ................................................................................................... 43

5.1 Overview ............................................................................................ 43

5.2 Safety Message ................................................................................. 43

5.3 Warning ............................................................................................. 44

5.4 Commissioning on the bench with Hand-Held Terminal .................... 45

5.5 General Considerations ..................................................................... 46

5.6 Electrical Considerations ................................................................... 46

5.7 Wiring ................................................................................................. 47

5.8 Mechanical Considerations ................................................................ 54

5.9 Environmental Considerations ........................................................... 56

6. On-line Operation ........................................................................................ 57

6.1 Overview ............................................................................................ 57

6.2 Safety Message ................................................................................. 57

6.3 Configuration Data Review ................................................................ 57

6.4 Check Output ..................................................................................... 58

6.5 Basic Setup ........................................................................................ 58

6.6 Detailed Setup ................................................................................... 59

6.7 Tag Information set up ....................................................................... 59

6.8 Diagnostics and Services ................................................................... 60

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6.9 Calibration ......................................................................................... 60

6.10 Advance Set Up: ................................................................................ 61

7. Maintenance ............................................................................................... 62

7.1 Overview ............................................................................................ 62

7.2 Safety Message ................................................................................. 62

7.3 Hardware Diagnostics ........................................................................ 63

7.4 Hardware Maintenance ...................................................................... 64

8. Appendix I ................................................................................................... 68

9. EU Declaration of Conformance ................................................................. 70

10.EU Type Examination Ex d ......................................................................... 72

11.EU Type Examination Ex ia ........................................................................ 74

Manufactured and sold by:

PAD 01/0918 ATEX

KOBOLD Instruments Inc.

1801 Parkway

Pittsburgh PA 15205-1422

Tel.: [phone]
Fax: [phone]

E-Mail: [e-mail]

Internet: www.koboldusa.com

Version: 01/0918

View Drive

page 3

PAD

2. Introduction

The PAD Smart Pressure Transmitter is correctly calibrated at the factory before
shipment. To ensure correct and efficient use of the instrument, please read this
manual thoroughly and fully understand how to operate the instrument before
operating it

(1) The contents of this manual are subject to change without prior notice.
(2) All rights reserved. No part of this manual may be reproduced in any form

without Kobold Messring’s written permission.

(3) If any question arises or errors are found, or if any information is missing from

this manual, please inform the nearest sales office.

(4) The specifications covered by this manual are limited to those for the

standard type under the specified model number break-down and do not
cover custom-made instrument.

(5) Please note that changes in the specifications, construction, or component

parts of the instrument may not immediately be reflected in this manual at the
time of change, provided that postponement of revisions will not cause
difficulty to the user from a functional of performance standpoint.

2.1 Using This Manual

The Chapters in this operating manual provide information on installing,
operating, and maintaining devices from KOBOLD Model PAD Smart Pressure
Transmitter. Chapters within this manual are organised as follows.

Chapter 3 Handling
Chapter 3 provides instructions on software functions, configuration parameters,
and online variables.

Chapter 4 Transmitter Functions
Chapter 4 contains instructions for configuring and commissioning Model PAD
Smart Pressure Transmitters.

Chapter 5 Installation
Chapter 5 contains mechanical, environment and electrical installation
instructions for Model PAD Smart Pressure Transmitters.

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Chapter 6 On-line Operation
Chapter 6 describes the configuration process and how to use basic and
advanced Model PAD Smart Pressure Transmitter software functions during
configuration.
Included in these sections are details on using:-.
(1) Sensor or Output Trim
(2) Changing range configuration, Output Type, Damping, measurement units

etc.

(3) Change of general data such as Tag No. Date, Message etc.

Chapter 7 Maintenance
Chapter 7 contains hardware diagnostics, troubleshooting and maintenance
tasks.

Appendix I : List of Error Codes available on LCD display

2.2 Overview of Transmitter

Kobold Smart Pressure Transmitter are microprocessor based “smart” pressure
transmitters. It uses a piezoelectric/ capacitance pickup optimised & accurately
characterised with a patented temperature compensation algorithm for high
precision & long term stable gauge and absolute pressure measurements over a
wide range of operating conditions. PAD is a two wire loop power transmitter and
has a standard 4/20mA output scaled for desired output pressure range. In
addition it also offers digital HART® (digital signal superimposed over the
analogue output) communication that allows transmitting additional digital
parameters/diagnostic information for advanced control systems like DCS, PLC.
This transmitter can be configured remotely via HART® communication through a
HHT (HART® Hand-Held Terminal using DDL or DOF technology) or any HART®
enabled PC configurator. This allows critical variables to be changed, configured
and tested remotely by users. Note: For HART® Communication a minimum
250~500 Ohm loop resistance is mandatory between power supply and
transmitter.

2.3 Software Compatibility

KOBOLD Smart Pressure Transmitters are shipped from the factory with the
most up to date firmware. However as product developments and new features
are released a firmware update becomes necessary to incorporate these new
changes. As such transmitters with older firmware may restrict certain functions
when communicating with an external HHT (Model 275/375HART®
Communicator). There may also be some differences on supported functions on
the local push button menu based on the installed firmware revision of the
transmitter. This manual is based on firmware Revision 6.3. Function deviations
as to firmware Revision are same as in table below:

PAD 01/0918 ATEX

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Function Supports

FUNCTION

ZERO/SPAN   

ZERO TRIM   

ZERO Adj   

Units set   

Range set   

Damping set   

LCD Decimal set   

LCD Mode   

 : Supported.
 : Supported but update required

ZERO / SPAN Button

Version 6.3 or above

PC/UMPC

275/375

2.4 Transmitter Components

HART

The various components of PAD Series Smart Pressure Transmitter are shown
below:

page 6

Figure 2-1. Model PAD Transmitter Exposed View (Housing)

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Figure 2-2. TRANSMITTER COMPONENTS (HOUSING)

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Figure 2-3. Model PAD Exploded View (Sensor Module-D,G)

Figure 2-4. TRANSMITTER COMPONENTS (SENSOR MODULE -D, G)

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Figure 2-5. Model PAD Exploded View (Sensor Module-H)

Figure 2-6. TRANSMITTER COMPONENTS (SENSOR MODULE -H)

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3. Handling Cautions

This chapter consists of cautions for transmitter handling and storage, selection of
installation locations, insulation structure, etc.

[Quick Reference Manual]

Step Job Job Details Instrument

1 Unpacking

Model and

2

Specifications
Check

3 Storage

4 Calibration Bench

Installation

5

Locations

Mechanical

6

Considerations

Electrical

7

Considerations

Mounting and

8

Installation

Calibration on

9

Spot

10 Pressure

11 Operation - Make sure that transmitter operates within specs. Visual or HHT

Unpack transmitter packing

-

- Make sure whether the delivered transmitter is

as options attached on its nameplate

- Places not exposed to water, non-vibration and non-

impact area

Ambient temperature 25 deg C and relative

-

65 % RH

- Configuration of Range, Zero/Span, Unit,

Damping Time, Transfer Function, DA
parameters

Where ambient temperature is not fluctuated

-

- Where no corrosion happens by chemical materials,

etc.

Where vibration and impact is not severe

-

- Where maintenance is very easy

Where transmitter can be handled easily

-

- Be cautious of the pressure leaks

- Connect 24 V

(Recommended Power Supply is 11.9 V

-

For HART communication, total resistance
transmitter terminal loop should be 250 – 550 Ohm.

- For mounting transmitter, an appropriate

should be used.

- Transmitter should be firmly to its bracket.

- Sensor Zero

installation and start-up. During a Zero
baseline of transmitter is established.

Before initiating zero trim make sure that PV value

-

transmitter is zero and current output is at 4 mA

- Do not apply the differential and/or full line

suddenly.

-

Close equalizing valve
open stop valve on high and low
simultaneously.

DC

Trim is highly recommended during first

of 3/5 valve manifold, then,

Trim and

DC

trim the

side slowly

same

humidity

Tag,

other

– 45 VDC)

on

bracket

zero

of

pressure

and

Nameplate

- HHT
ressure S

- P

- Galvanometer

(Engineering)

(Engineering)

(Engineering)

(Mounting and

tallation)

Ins

HHT or
Zero/Span button

(Applying
pressure)

ource

page 10

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3.1 Unpacking

When moving the transmitter to the installation site, transfer it in its original
packaging. Only unpack the transmitter on site of installation to avoid damage
during transit.

3.2 Models and Specifications Check

The model name and specifications are indicated on the top name plate fixed to
the transmitters. Please check your specification and model supplied for your
installation.

3.3 Storage

The following precautions must be observed when storing the instrument,
especially for a long period.

(1) Select a storage area that meets the following conditions:

(a) It is not directly exposed to rain, water, snow or sun light.
(b) It is exposed to minimum vibration and shock.
(c) If possible, it is advisable to store at normal temperature and humidity
(approx. 25 °C, 65 % RH).

However, it can also be stored under ambient temperature and relative humidity
within the following published ranges.

Ambient Temperature: -40 ~ 80 °C (with LCD module) *

* General use only. For explosion proof versions follow product certification
requirements.

Relative Humidity: 5 % ~ 98 % RH (at 40 °C)

(2) When storing the transmitter, repack with original (or similar) packaging that

was shipped from the factory.

(3) If storing a transmitter that has already been used, thoroughly clean all wetted

parts including diaphragm seals (if installed), process connections/manifolds
in contact with process fluid. In addition, make sure before storing the
transmitter that remote seal (if supplied) assemblies are securely mounted.

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3.4 Selecting the Installation Locations

The transmitter is designed to withstand severe environmental conditions.
However, to ensure stable and accurate operation for many years, the following
precautions must be observed when selecting an installation location.

(1) Ambient Temperature

Avoid locations subject to wide temperature variations or a significant
temperature gradient. If the location is exposed to radiant heat from plant
equipment, provide adequate insulation or ventilation.

(2) Ambient Atmosphere

Avoid installing the transmitter in a corrosive atmosphere. If the transmitter
must be installed in a corrosive atmosphere, there must be adequate
ventilation as well as measures to prevent intrusion or stagnation of rainwater
in conduits. Moreover, there should be appropriate ventilation preventing
corrosion by rain gathered on conduit.

(3) Shock and Vibration

Select an installation site suffering minimum shock and vibration (although
the transmitter is designed to be relatively resistant to shock and vibration)

(4) Accessibility

Select location that provides easy access for maintenance & calibration.

(5) Installation of Explosion Protected Transmitters.

Explosion – protected transmitters can be installed in hazardous areas
according to gas types for which they are certified.

3.5 Performing Sensor Zero Trim after Installation

(1) Sensor Zero Trim should be done after transmitter is installed because zero

point can shift due to mounting status of the sensor pick up.

(2) For Sensor Zero Trim, make input pressure of transmitter zero prior to

initiating zero trim calibration. Any Sensor Trim done in field must be carried
out after installation is finalized and with transmitter position fixed. Also if
applying external pressure ensure the display is sufficiently stabilized (after
approximately 10 to 15 seconds) before initiating any Trim function.

(3) There are two recommendations for making input pressure “zero”. One is to

apply a “zero” pressure source (mandatory for absolute pressure models).
The second option is to open equalizing valve of manifolds and venting to
atmospheric pressure (allowed only for Gauge type models).

(4) Sensor Zero Trim can be performed using an external HHC (Hand held

calibrator), PC or PDA configurator, and/ or using Zero/Span local push
buttons provided on the transmitter.

(5) When using local push buttons please refer to Chapter 4.7 of this manuals for

detailed instructions. If using an external HHT or HART® PC configurator
please refer to the user manuals supplied by the third party supplier.

page 12

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3.6 Pressure Connections

 Warning

Instrument installed in the process is under pressure. Never loosen or tighten the
flange bolts as it may cause dangerous spouting of process fluid.

If the accumulated process fluid may be toxic or otherwise harmful, take
appropriate care to avoid contact with the body or inhalation of vapors even after
dismounting the instrument from process line for maintenance.

The following precautions must be observed in order to safely operate the
transmitter under pressure.
(1) Never apply a pressure higher than the maximum working pressure specified

on the nameplate.

(2) Use adequate seals for leak tight process connections and use only quality

and standardized parts.

(3) Regularly inspect for signs of leakage and apply corrective actions when

necessary.

3.7 Waterproofing of Cable Conduit Connections

Apply a non-hardening sealant (silicone or tape, etc.) to the threads to waterproof
the transmitter cable conduit connections.

3.8 Restrictions on Use of Radio Transceivers

 Warning

Although the transmitter has been designed to resist high frequency electrical noise,

if a radio transceiver is used near the transmitter or its external wiring, the

transmitter may be affected by high frequency noise pickup. To test for such effects,

bring the transceiver in use slowly from a distance of several meters from the

transmitter, and observe the measurement loop for noise effects. Thereafter, always

use the transceiver outside the area affected by noise.

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3.9 Insulation Resistance Test and Dielectric Strength Test

Since the transmitter has undergone insulation resistance and dielectric strength
tests at the factory before shipment, normally these tests are not required.
However, if required, observe the following precautions in the test procedures.

(1) Do not perform such tests more frequently than is absolutely necessary. Even

test voltages that do not cause visible damage to the insulation may degrade
the insulation and reduce safety margins.

(2) Never apply a voltage exceeding 500 VDC (100 VDC with an internal lightening

protector) for the insulation resistance test, nor a voltage exceeding 500 V
(100 V

(3) Before conducting these tests, disconnect all signal lines from the transmitter

terminals. Perform the tests in the following procedure.

(4) Insulation Resistance test

(a) Short-circuit the + and - SUPPLY terminals in the terminal box.
(b) Turn OFF the insulation tester. Then connect the insulation tester plus (+)

(c) Turn ON the insulation tester power and measure the insulation

(d) After completing the test and being very careful not to touch exposed

with an internal lighting protector) for the dielectric strength test.

AC

lead wire to the shorted SUPPLY terminals and the minus (-) lead wire to
the grounding terminal.

resistance. The voltage should be applied as short as possible to verify
that insulation resistance is at least 20 M.

conductors disconnect the insulation tester and connect a 100K resister
between the grounding terminal and the short-circuiting SUPPLY
terminals. Leave this resistor connected at least three second to
discharge any static potential. Do not touch the terminal while it is
discharging.

AC

page 14

(5) Dielectric Strength Test

(a) Short-circuit the + and - SUPPLY terminals in the terminal box.
(b) Turn OFF the dielectric strength tester. Then connect the tester between

the shorted SUPPLY terminal and the grounding terminal. Be sure to
connect the grounding lead of the dielectric strength tester to the ground
terminal.

(c) Set the current limit on the dielectric strength tester to 10mA, then turn

ON the power and gradually increase the tester voltage from '0' to the

specified voltage.
(d) When the specified voltage is reached, hold it for one minute.
(e) After completing this test, slowly decrease the voltage to avoid any

voltage surges.

PAD 01/0918 ATEX

3.10 Installation of Explosion Protected Type Transmitters

3.10.1 ATEX Approval Explosion Proof

ATEX Certification number: KEMA 10ATEX0141 X Issue Number: 2
CE 0158 II 2 G

Note 1. Model PAD for potentially explosive atmosphere
Ex d IIC T6...T4 Gb
Operating Temperature : -20℃ T

T6 for process  85 C;
T5 for process  100 C;
T4 for process  130 C

Note 2. Electrical Data
Supply Voltage : 11.9…42 VDC
Output Signal : 4 to 20 mA + HART

 +60C

amb

PAD

Note 3. Electrical Connection: see ordering table

Note 4. PAD ATEX Certification is according to the below standards

EN 60079-0:2012 + A11
EN 60079-1:2007

Note 5. Installation

 All wiring shall comply with local installation requirement.
 The cable glands and blanking elements shall be of a certified flameproof type,

suitable for the condition of use and correctly installed. Also those devices
should be endured at the 130C.

 Housing Ground must be followed to “local electrical codes”. The most efficient

ground procedure is to connect directly to the earth as least impedance.

 How to Ground the Housing:

* Internal Ground Connection: Open rear cover on transmitter, there is a bolt

for ground with a grounding mark
* External Ground Assembly: On the left side of transmitter, there is a bolt for
ground with a grounding mark (for grounding use a cable lug)
* Housing rotation hexa screw bolt shall be screwed tightly in order to hold the
position of transmitter

 When use tubing, stopping boxes must be connected with the wall of housing

directly.

 Tubing is installed a minimum of 5 threads.
 Sensor is to be threaded a minimum of 7 threads and prevented from turning

by tightening the housing rotation set screw.

 Do not disassemble flameproof Joints but in an unavoidable case to

disassemble it or need the specification of flameproof Joints, contact the
manufacturer before doing.

PAD 01/0918 ATEX

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 Warning
Ensure the correct wiring of power cable. Do not connect the power cable on

Test +/- connection, as this may result in transmitter defect or mal-function.

 WARNING-DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE MAY BE

 Take care not to generate mechanical spark when access to the instrument

 The instrument modification or parts replacement by other than authorized

page 16

Note 6. Operation

PRESENT

and peripheral devices in hazardous location.

Note 7. Maintenance and Repair

representative of KOBOLD Messring GmbH is prohibited and will void
KEMA/ATEX Explosion-proof / Flame-proof.

PAD 01/0918 ATEX

3.10.2 ATEX Approval Intrinsic Safe

ATEX Certificate Number : DEKRA 18ATEX0092 X
Equipment or protective systems intended for use in potentially explosive
atmospheres
– Directive 2014/34/EU
The marking of the product shall include the following:

II 1 G or 2 G Ex ia llC T5 or T4 Ga or Gb
For T5: -30 to 40 deg C
For T4: -30 to 80 deg C

Electric Safety Parameter (Ui, Ii, Pi, Ci, Li)

 Ui = 30 Vdc
 Ii = 200 mA
 Pi = 0.9 W
 Ci = 27 nF
 Li = 104 uH

Compliance with Essential Health and Safety Requirements assured with:

EN 60079-0:2009
EN 60079-11:2007
EN 60079-26:2007

PAD

Safety Instructions: General

 Comply with the installation and safety instructions in the operating

instructions.

 Staff must meet the following conditions for mounting, electrical

installation, commissioning and maintenance of the device:

- Be suitable qualified for their role and the tasks they perform

- Be trained in explosion protection

- Be familiar with national regulations

 Install the device according to the manufacturer’s instruction and national

regulations

 Only use the device in media to which the wetted materials have sufficient

durability.

 Avoid electrostatic charging:

- Of plastic surface (e.g. housing, sensor element, special varnishing,

attached additional plates,...)

- Of isolated capacities (e.g. isolated metallic plates)

Safety Instructions: Special Conditions

The non-metallic parts incorporated in the enclosure of this equipment may
generate an ignition capable level of electrostatic charge. Therefore particularly
when it is used for application that specifically require Group IIC, EPL Ga
equipment, the equipment shall not be installed in a location where the external
conditions can result in the build-up of electrostatic charge on such surfaces.
Additionally, the equipment shall only be cleaned with a damp cloth.

PAD 01/0918 ATEX

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PAD

Models with enclosures made of aluminium (ASTM B85) are considered to
present a potential risk of ignition by impact or friction. Care must be taken during
installation and use to prevent impact or friction. Particularly, it must not be used
for applications that specifically require EPL Ga equipment.
The insulation between the intrinsically safe circuit and the frame of the
equipment is not capable of withstanding a 500 V dielectric strength test as
defined in clause 6.3.12 of EN 60079-11:2007. This shall be taken into account
during installation.

 Warning

 There are two cable entries. User shall select one of them to wire the

cable.

 Make sure to use a cable gland at one cable entry with sufficient

protection category and suiting the outer cable diameter used. The
second cable entry shall be blocked by using a conduit plug or any other
parts.

 For hazardous area usage, the choice of cable gland should suit the

application and fulfill the corresponding certification requirements & end
user’s requirement.

INSTALLATION

◈ Wiring is to be carried out only by qualified staff.
◈ The power supply voltage limits shall not be exceeded.

◈ Maintenance and repair should be isolated by power supply and any pressure.
◈ Wiring methods and length of cable of power supply cable and ground cable

should be considered by proper Ex condition.

◈ Transmitter has the ‘reverse polarity protection diode’ in order to prevent failure

in the field while wiring +, - power supply voltage. However if the wiring is not
performed correctly or wrong terminals on rear terminal board are used for
power supply, the transmitter may malfunction.

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◈ Any additional part or accessory connected to transmitter shall have correct

approval certificate to comply with the given Ex/ Non-Ex requirement. Cable
gland, connector, adapter or any other connection used shall have the
appropriate certification/ approval for use with the transmitter

◈ Additional electrical connection parts shall only be plugged by suitable plugs.
◈ Grounding of housing shall follow the “Local Electrical Codes”. For grounding a

wire cross section of at least 4 mm2 is recommended.

◈ Any cable grand must be approved by Ex condition in hazardous area.
◈ Connecting point of any joint (thread) parts should be followed by IEC 60079-1,

5.3 clause.

◈ Housing Grounding

 Internal Ground Connection: Open rear cover on transmitter, the ground bolt

is located inside with grounding mark

 External Ground Assembly: On the left side of transmitter, there is a bolt for

ground with grounding mark (for grounding use a cable lug).

 Housing Rotation hexa screw bolt shall be screwed tightly in order to hold

the position of transmitter.

◇ Compliance for intrinsically safety is ensured only if the intrinsically safe safety

barrier complies with safety parameters as provided in the relevant ATEX
certification

◇ To comply with intrinsic safe system concept, the transmitter is connected with

the safety barrier in a loop (see chapter 5.7. Wiring).

◇ To assure an Intrinsic Safety System, the transmitter and barrier must be

wired in accordance with the barrier manufacturer’s field wiring instructions
and the applicable circuit diagram.

Warning

The entity concept allows interconnection of intrinsic safe apparatus to
associated apparatus not specifically examined in combination as a
system.

◇ The approved value of open circuit max. voltage Uo, max. short circuit current

Io and max. power Po in associated equipments are should be less than or
equal for max. safe input voltage Uo, max. input current Ii and max. safe
power Pi of the transmitter with Ex ia.

◇ The approved value of max. capacitance Co in associated equipments should

be bigger than total value of capacitance Ci in transmitter with Ex ia + cable
capacitance in associated equipment.

◇ The approved value of max. inductance Lo should be bigger than total value

of inductance Li in transmitter with Ex ia + cable inductance in associated
equipment.

Equip with Ex ia Comparison Associated Equipment

Ui = 30 VDC  Uo

Ii = 200 mA  Io

Pi = 0.9 W  Po
Ci = 27 nF < Co

Li = 104 uH < Lo

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PAD

Operating

◇ Do not open or disassemble of the transmitter in Ex area or while operating.
◇ Do not make any spark in Ex area with Kobold transmitters.

Caution

External load resistance includes the safety barrier resistance for intrinsic
safety device.

3.11 Notes on the machine and pressure equipment directive

When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.

as per PED 2014/68/EU

"Pressure gauges with a volume  0.1 L"
In acc. with Article 4 Paragraph (3), "Sound Engineering Practice", of the PED
2014/68/EU no CE mark.

Diagram 2
Vessels referred to in Article 4(1)(a)(i), second indent

4. Transmitter Functions

4.1 Overview

This Chapter contains information on operating Model PAD. Tasks that should be
performed on the bench prior to installation are explained in this chapter.

4.2 Safety Message

page 20

Procedures and instructions in this chapter may require special precautions to
ensure the safety of the personal performing the operations. Information that
raises potential safety issues is indicated by warning symbol (). Refer to the
following safety messages before performing an operation preceded by this
symbol.

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4.3 Warning

 Warning

Electrical can result in death serious injury:
 Avoid contact with the leads and terminals. High voltage that may be present

on leads can cause electrical shock.

 Warning

Electrical can result in death serious injury:
 Only qualified & trained personnel should be allowed to operate these

transmitters.

4.4 Fail Mode Alarm

Kobold Smart Pressure Transmitter automatically and continuously performs self­diagnostic routines. If the self-diagnostic routines detect a failure, the transmitter
drives its output outside of the normal saturation values. The transmitter will drive
its output low (down) or high (up) based on the position of the failure mode alarm
jumper . See Table 4.1 for Output values.

[Table 4-1 Standard Alarm and Saturation Value]

Level 4~20 mA Saturation 4~20 mA Alarm

Low/Down 3.9 mA  3.75 mA

High/Up 20.8 mA  21.75 mA

Fail Mode Selection (Fail High/UP or Low/DOWN) can be configured using the
appropriate jumper switch provided on the LCD Module or DIP switches included
on the Main CPU Module. For units provided with a LCD module one can select
desired fail safe mode directly from the jumper switch included in the front display
and this setting overrides the DIP settings on the back-end Main CPU module,
provided the DIP switch “2” on CPU module is DOWN. If DIP switch “2” on CPU
module is UP, this setting overrides the jumper setting on LCD module. Default
setting from the factory is “Fail Down” (DIP Switch “2” on CPU Module is DOWN).
However in case of blind units please select your required DIP switch settings
from the DIP switch labelled (2) marked on the Main CPU board. Recommended
jumper & DIP settings are listed in the table below for ready reference.

Select Fail

Mode

Fail Down Down D D

Fail Up

Both LCD Module and CPU

Module

CPU Module LCD Module CPU Module

Down U

Up U or D

Only CPU

Module

U

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PAD

< Fail Mode Selection DIP Switch of CPU Module >

UP

DOWN

1.

WR_EN (EEPROM Wr
DOWN : ENABLE CONFIGURATION CHANGES
UP

: DISABLE/ LOCK CONFIGURATION CHANGES

2. Fail Mode(Alarm)
DOWN : LOW
UP : HIGH

ite Enable)

Note: DIP Switch (1) shown on Left in Fig 4-1 is for Write Enable/ Disable
selection. DIP switch (2) shown on right in Fig 4-1 is for Fail Mode.

(Figure 4-1. Fail Mode and EEPROM-Write Selection DIP Switch)

< Fail Mode Selection Jumper Switch of LCD Module >

U O

(FAIL MODE DOWN,
place jumper to right)

O O U O O O D O O O D

FAIL MODE SELECT

(FAIL MODE UP,
place jumper to left)

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Figure 4-2 Fail Mode Selection Jumper Switch of LCD Module

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PAD

4.5 EEProm-Write Enable / Disable Mode Switch

PAD includes an EEPROM (Electrically Erasable Programmable Read Only
Memory) that allows saving and restoring various configuration data within the
transmitter on power failure. To lock configuration and protect changes to stored
configuration data, one can use a HHC and or external HART® enabled PC
device to enable a software lock feature under Status menu. Optionally for
security lock on hardware side there is a Write-Protect Mode DIP Switch (1) on
the Main CPU Module placed right next to the Fail Safe Mode switch (2). If you
push DIP switch to UP you can lock out users from making any changes to
configuration data through push buttons and/ or remote HHC already saved in the
EEPROM. Alternatively when you push DIP Switch (1) to DOWN you can allow
changes made to configuration data in EEPROM. Default state from factory
(including with NO Jumpers) installed is EN (enable configuration changes).

CPU Module Jumper Switch

1) EEPROM Write Selection

2) Fail Mode Selection

Figure 4-3. CPU Module Fail Mode, EEPROM-Write Selection Jumper Switch

Note: DIP Switch (1) shown on Left in Fig 4-1 is for Write Enable/ Disable
selection.
DIP switch (2) shown on right in Fig 4-1 is for Fail Mode.

4.5.1 Security

To quickly summarize there are three options available to implement
configuration security
lock out within the PAD. These include:
(1) DIP settings on CPU Board
(2) Software enable/ disable on Write function using HHT or HART® PC.
(3) Physically removing Zero and Span Magnetic Buttons from Transmitter

thereby restricting local access to push button menus. This option will still
allow changes via a remote HHT or HART® enabled configurator.

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