BEKA BA474D Installation and operating instructions

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Installation & Maintenance Instructions
BA474D

Installation & Maintenance Instructions
BA474D
Intrinsically safe field mounting indicating
temperature transmitter
Reading Office
Cutbush Park, Danehill, Lower Earley,
Reading, Berkshire. RG6 4UT. UK.
Tel: [phone]
Email: [email protected]
Aberdeen Office
Unit 6 Airside Business Park, Kirkhill Industrial Estate,
Dyce, Aberdeen. AB21 0GT. UK.
Tel: [phone]
Email: [email protected]
Internet: www.able.co.uk
e-procurement: www.247able.com
Registered in England No: 01851002
VAT No: GB 417 2481 61

Issue 8
4th March 2014
BA474D
Intrinsically safe
field mounting
indicating temperature
transmitter
Issue 8

2
1. Description
2. Documentation
3. Operation
3.1 Controls
4. Intrinsic safety certification
4.1 ATEX certificate
4.2 Zones, gas groups & T rating
4.3 Associated apparatus
4.4 Certification label information
4.5 Input terminals 1, 2, 3 & 4
4.6 4/20mA output – terminals 5 & 6
5. Electrical system design
5.1 Use as an intrinsically safe instrument
5.1.1 With Zener barriers
5.1.2 With galvanic isolators
5.2 Use as Associated Apparatus
5.3 Use as a temperature indicator
6. Installation
6.1 Location
6.2 Installation procedure
6.3 Associated apparatus installation
6.4 EMC
7. Configuration
7.1 Configuration menu
7.1.1 Access
7.1.2 Summary of functions
7.2 Description of configuration menu functions
7.2.1 Transmitter input ‘InPut’
7.2.2 Thermocouple type ‘t.tYPE’
7.2.3 Units of digital display ‘dEG’
7.2.4 Display resolution ‘rESn’
7.2.5 Cold junction compensation ‘CJC’
7.2.6 Sensor fault analogue indication ‘FAuLT’
7.2.7 Configuration of 4/20mA output ‘CAL’
7.2.8 Configuration of bargraph display ‘bAr’
7.2.9 Access code ‘CodE’
7.2.10 Resistance thermometer type ‘r.tYPE’
7.2.11 Decimal point position ‘dP’
7.2.12 Lower input & display ‘in-Lo’
7.2.13 Higher input & display ‘in-Hi’
7.3 Default configuration
8. Configuration example
9. Maintenance
9.1 Fault finding during commissioning
9.2 Fault finding after commissioning
9.3 Servicing
9.4 Routine maintenance
9.5 Guarantee
9.6 Customer comments
10. Accessories
10.1 Scale and Tag marking
10.2 Tag plate
10.3 Pipe mounting kits
10.4 Alarms
10.4.1 Solid state output
10.4.2 Intrinsic safety
10.4.3 Alarm configuration
10.4.4 Alarm selection ‘Alr1’ & ‘Alr2’
10.4.5 Alarm enable ‘EnbL’
10.4.6 Setpoint adjustment ‘SP1’
10.4.7 Alarm function ‘Hi.Lo’
10.4.8 Alarm output status ‘no.nC’
10.4.9 Hysteresis ‘HStr’
10.4.10 Alarm delay ‘dELA’
10.4.11 Alarm silence time ‘SiL’
10.4.12 Access setpoint ‘ACSP’
10.4.13 Adjusting alarm setpoints from
operational mode.
Appendix 1
ATEX dust certification
Appendix 2
FM Approval for use in the USA and
cFM Approval for use in Canada.
Appendix 3
IECEx certification
CONTENTS
The BA474D is CE marked to show compliance with the European Explosive Atmospheres
Directive 94/9/EC and the European EMC Directive 2004/108/EC

3
1. DESCRIPTION
The BA474D is a field mounting, intrinsically safe
4/20mA loop powered temperature transmitter with a
large easy to read display. The instrument, which is
HARTenabled, may be conditioned on-site to
operate with most common thermocouples and
resistance thermometers and will provide a linear
4/20mA output proportional to temperature, plus a
digital temperature display. Voltage and resistance
inputs may be scaled allowing the BA474D to display
variables other than temperature such as position
and weight.
Optional factory fitted alarms provide two galvanically
isolated solid state outputs that may be
independently configured for high or low operation.
For installation in poorly illuminated areas, an
optional factory fitted loop powered display backlight
is available.
The BA474D has been certified intrinsically safe and
as associated apparatus by European Notified Body
Intertek Testing and Certification Ltd (ITS). The
transmitter complies with the ATEX Directive 94/9/EC
for use in explosive gas and combustible dust
atmospheres. ATEX dust certification is an option -
see Appendix 1.
For international applications the BA474D has IECEx
intrinsic safety and associated apparatus certification
for use in explosive gas and combustible dust
atmospheres. IECEx dust certification is an option –
see Appendix 3. A version with FM and cFM
approval is available – see Appendix 2.
Fig 1 Simplified block diagram
2. DOCUMENTATION
This instruction manual describes the installation and
configuration of the BA474D Indicating Temperature
Transmitter for ATEX intrinsically safe and associated
apparatus applications.
System design information for IECEx and other non-
ATEX certifications and for use in combustible dust
atmospheres is contained in Appendices to this
manual.
The transmitter is HART Registered and is compliant
with HART protocol standard revision 7. HART
commissioning information is included in the
BA47X/67X Indicating Temperature Transmitter
HARTInterface Guide which may be downloaded
from www.beka.co.uk/manuals
3. OPERATION
Fig 1 shows a simplified diagram of the BA474D
Indicating Temperature Transmitter. The input,
which may be from a resistance thermometer,
thermocouple, or a dc voltage or resistance, is
digitised and transferred to the instrument processor
via an optical isolator. The processor linearises the
input signal, displays the resulting temperature in the
selected units and controls the 4/20mA output
current.
3.1 Controls
All functions of the transmitter may be configured via
the four push buttons which are located behind the
removable switch cover – see Fig 7. For applications
where frequent adjustments are required the BA474D
transmitter is available with an optional external
membrane keypad. Buttons respond within 0.5
seconds of being operated and unless continuously
pushed the transmitter display will return to the
operating mode after 2 seconds.
In the operational mode, i.e. when the transmitter is
displaying the input signal, these push buttons have
the following functions:
Button Function
While this button is operated the transmitter
will show the display corresponding to 4mA
output.
▲While this button is operated the transmitter
will show the display corresponding to
20mA output.
+Transmitter displays output current in mA
followed by output as % of the range.
P + Transmitter displays HARTshort address
followed by firmware version number.
P + EEntry to configuration menu.
When fitted with optional alarms
P + Entry to alarm set point menu. See 10.4.12
E + Transmitter displays alarm 1 setpoint
E + Transmitter displays alarm 2 setpoint
P Activated alarm reverts to the non-alarm
condition for the configured alarm silence
time. See 10.4.11

4
4. INTRINSIC SAFETY CERTIFICATION
The BA474D Indicating Temperature Transmitter is
intrinsically safe allowing installation in Zone 0, 1 or 2
when protected by a safe area Zener barrier or
galvanic isolator.
The transmitter is also certified as associated
apparatus, which when mounted in a safe area,
allows the input terminals to be directly connected to
a sensor in Zone 0, 1 or 2 without the need for Zener
barriers or galvanic isolators.
4.1 ATEX certificate
Notified Body Intertek Testing and Certification Ltd
have issued the BA474D with an EC-Type
Examination Certificate number ITS09ATEX26155.
This states that the transmitter is intrinsically safe and
complies with requirements for Group II, Category
1GD Ex ia IIC T5 equipment, and that it also
complies with the requirements for intrinsically safe
associated apparatus. The transmitter bears the
community mark and subject to local codes of
practice may be installed in any of the European
Economic Area (EEA) member countries. ATEX
certificates are also acceptable for installations in
Switzerland.
This main section of this instruction manual describes
ATEX installations in explosive gas atmospheres
conforming with EN 60079-14 Electrical Installations
in Hazardous Areas. When designing systems for
installation outside the UK the local Code of Practice
should be consulted.
For use in the presence of combustible dust, please
refer to Appendix 1, which describes ATEX
installations complying with EN 61241-14. Dust
certification is an option that must be specified when
the transmitter is ordered.
4.2 Zones, gas groups and T rating
The BA474D has been certified as Group II Category
1G Ex ia IIC T5 apparatus. When connected to a
suitable certified system the BA474D may be
installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture
likely to occur in normal
operation.
Zone 2 explosive gas air mixture not likely
to occur, and if it does will only
exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1 450oC
T2 300oC
T3 200oC
T4 135oC
T5 100oC
At an ambient temperature between –40 and +70ºC.
This allows the BA474D to be installed in all Zones
and to be used with most common industrial gases.
4.3 Associated apparatus
The ATEX certificate also states that the BA474D
Indicating Transmitter complies with the requirements
for associated apparatus as it has a galvanically
isolated intrinsically safe sensor input. When
installed in a safe area this allows the transmitter
sensor input, terminals 1, 2, 3 & 4, to be connected
directly, without the need for Zener barriers or
galvanic isolators, to a sensor installed in:
Zone 0 explosive gas air mixture
continuously present.
Zone 1 explosive gas air mixture
likely to occur in normal
operation.
Zone 2 explosive gas air mixture not likely
to occur, and if it does will only
exist for a short time.
With a gas in groups:
Group A propane
Group B ethylene
Group C hydrogen

5
4.4 Certification label information
The certification information label is fitted in a recess
on the top outer surface of the enclosure. It shows
details of the ATEX certification plus BEKA
associates name and location. IECEx approval
information is also included. The label on some
versions of the transmitter will also show non-
European certification information.
The instruments serial number and the year of
manufacture are recorded on a separate label inside
the terminal compartment.
4.5 Input terminals 1, 2, 3 and 4
When used as intrinsically safe or associated
apparatus the transmitter’s input terminals may be
connected to any floating or earthed sensor
complying with the requirements for simple
apparatus. i.e. a sensor that generates less than
1.5V; 100mA or 25mW, such as a thermocouple,
resistance thermometer or a potentiometer.
The transmitter input may also be connected directly
to a voltage source that does not comply with the
requirements for simple apparatus, providing safety is
assessed using the entity concept.
The safety parameters for terminals 1, 2, 3 & 4 are:
Uo = 6.0V
Io = 30.3mA
Po = 46mW
Ui = 6.0V
Ii = 100mA
Pi = 0.194W
Co = 23.8µF
Lo = 3mH
4.6 4/20mA output - terminals 5 & 6
The BA474D Indicating Temperature Transmitter is
loop powered via these terminals which have the
following input safety parameters:
Ui = 28V
Ii = 200mA
Pi = 0.85W
When installed in a hazardous area the transmitter
must be powered via an ATEX certified Zener barrier
or galvanic isolator with output safety parameters
equal to or less than the above.
The equivalent internal capacitance and inductance
at terminals 5 & 6 is:
Ci = 46.5nF
Li = 8µH
5. ELECTRICAL SYSTEM DESIGN
The BA474D is a smart HARTenabled loop
powered 4/20mA Indicating Temperature Transmitter.
It may be used as an intrinsically safe instrument in a
hazardous area, or as associated apparatus in a safe
area with it’s input directly connected to a hazardous
area sensor. The transmitter is available with an
optional factory fitted display backlight that increases
the transmitter’s minimum operating voltage.
Operating voltage range between terminals 5 & 6:
without backlight 9.0 to 28V
with backlight 15.5 to 28V
5.1 Use as an intrinsically safe instrument
Intrinsic safety certification allows the transmitter and
sensor to be installed in any hazardous Zone
providing that the transmitter is protected by a
certified safe area mounted Zener barrier or galvanic
isolator. When the transmitter is fitted with an
optional display backlight the increased minimum
operating voltage usually precludes the use of Zener
barriers.

6
5.1.1 With Zener barriers
There are three requirements when designing a
BA474D loop using Zener barrier(s):
1. The intrinsic safety output parameters of the
Zener barrier must be equal to or less than:
Uo = 28V
Io = 200mA
Po = 0.85W
2. The voltage between terminal 5 & 6 of the
BA474D must be between 9 & 28V.
Note: Zener barriers are not normally able to
power a BA474D transmitter fitted with an
optional display backlight which requires a
minimum of 15.5V between terminals 5 & 6.
3. The maximum supply voltage must not
exceed the maximum working voltage of the
Zener barrier(s).
Fig 2 illustrates the simplest and least expensive
configuration in which a BA474D is powered from an
isolated (floating) power supply. Only one barrier is
required, as the other wire is earthed at the barrier
busbar.
Fig 2 BA474D powered from floating supply
If a common power supply is used to operate multiple
loops, the negative side of the supply is normally
earthed. To also allow the negative side of the
4/20mA load to be earthed it is necessary to have a
Zener barrier in each of the two wires entering the
hazardous area as shown in Fig 3.
Fig 3 BA474D powered from a common supply
When designing a transmitter loop it is necessary to
establish that the sum of the voltage drops caused by
the transmitter, Zener barriers, the load and the cable
resistance is less than the minimum supply voltage.
For the transmitter loop shown in Fig.3
Minimum operating voltage of BA474D 9.0V
without optional backlight.
Maximum voltage drop caused by 28V 6.8V
93mA Zener barrier.
(340x 20mA)
Maximum voltage drop caused by 1.6V
diode return Zener barrier.
Maximum voltage drop caused by 5.0V
250load.
(250x 20mA)
Maximum voltage drop caused by 0.2V
cable resistance.
(10x 20mA)
______
Total maximum voltage drop 22.6V
The power supply voltage must therefore be above
22.6V but below the maximum working voltage of the
28V 93mA barrier which is likely to be about 26.5V.

7
5.1.2 With Galvanic Isolators
A galvanic isolator can supply a higher voltage than a
Zener barrier to a loop powered transmitter and is
able to power a BA474D transmitter fitted with an
optional display backlight which has a minimum
operating voltage of 15.5V. Although an isolator is
more expensive than a Zener barrier it does not
require a high integrity earth. For small systems
where a high integrity earth is not already available a
galvanic isolator may reduce the overall installation
cost. Fig 4 shows a typical temperature transmitter
loop.
Fig 4 BA474D powered via galvanic isolator
Any ATEX certified 4/20mA repeater power supply or
transmitter power supply galvanic isolator may be
used. There are three requirements when designing
a BA474D loop incorporating a galvanic isolator:
1. The intrinsic safety output parameters of the
galvanic isolator must be equal to or less
than:
Uo = 28V
Io = 200mA
Po = 0.85W
2. The isolator must supply a minimum output
voltage at 20mA of:
BA474D without backlight 9.0V
BA474D with backlight 15.5V
3. If HARTcommunication is to be used the
galvanic isolator must be suitable for powering
‘smart’ transmitters, i.e. it must be transparent
to HARTsignals.
5.2 Use as associated apparatus
WARNING
When used as associated apparatus
without Zener barriers or galvanic
isolators the BA474D transmitter must
be installed in a safe, non-hazardous
area.
When installed in a safe area, the associated
apparatus certification allows the BA474D Indicating
Temperature input terminals 1, 2, 3 & 4, to be directly
connected to an earthed or floating sensor in a
hazardous area without the need for Zener barriers or
a galvanic isolator. Fig 5 shows a typical loop. The
sensor may be a passive device such as a
thermocouple or resistance thermometer complying
with the requirements for simple apparatus, or a
voltage source. See section 4.5 of this instruction
manual for full details of what may be connected.
The 4/20mA loop must be designed such that the
voltage between terminals 5 & 6 remains between
the following limits at all currents.
without backlight 9.0 to 28V
with backlight 15.5 to 28V
To comply with the associated apparatus certification,
terminals 5 & 6 should not be connected to any
apparatus containing or generating a voltage greater
than 250V rms or dc.
The intrinsically safe input wiring connected to
terminals 1, 2, 3 & 4 must be segregated from the
non intrinsically safe 4/20mA output wiring connected
to terminals 5 & 6. See section 6.2
Fig 5 Use as Associated Apparatus

8
5.3 Use as a temperature indicator
The BA474D may also be used as just a temperature
indicator by ignoring the instrument’s 4/20mA output
current. When installed in a hazardous area the
same Zener barriers or galvanic isolators required for
transmitter operation are required. When installed in
a safe area as associated apparatus, the supply
terminals 5 & 6 may be directly connect to a dc
supply with an output voltage between 9 and 28V, or
between 15.5 and 28V if the BA474D is fitted with an
optional backlight. No load resistor is required.

9
6. INSTALLATION
6.1 Location
The BA474D Indicating Temperature Transmitter is
housed in a robust IP66 glass reinforced polyester
(GRP) enclosure incorporating an armoured glass
window and stainless steel fittings. It is suitable for
exterior mounting in most industrial environments,
including offshore and wastewater treatment
installations. Please consult BEKA associates if high
vibration is anticipated.
The BA474D enclosure is surface mounting.
Accessory kits described in sections 10 of this
manual enable the instrument to be mounted onto a
vertical or horizontal pipe.
The field terminals and the two mounting holes are
located in a separate compartment with a sealed
cover allowing the instrument to be installed without
exposing the display assembly.
The BA474D earth terminal is connected to the
carbon loaded GRP enclosure. If this enclosure is not
bolted to an earthed post or structure, the earth
terminal should be connected to a local earth.
The BA474D enclosure is supplied with a bonding
plate to ensure electrical continuity between the three
conduit / cable entries.
The BA474D liquid crystal display has maximum
contrast when viewed from directly ahead and slightly
below the centre line of the instrument. Without a
backlight there is very little degradation of contrast
when viewed from above the centre line, but slight
degradation may be noticeable when the instrument
is fitted with a backlight.
6.2 Installation Procedure
Fig 6 illustrates the instrument installation procedure.
a. Remove the instrument terminal cover by
unscrewing the two captive 'A' screws.
b. Mount the instrument on a flat surface and
secure with two M6 screws through the 'B' holes.
Alternatively use one of the mounting kits
described in section 10.3
c. Remove the temporary hole plug and install
an appropriate IP rated cable gland or
conduit fitting. If more than one entry is
required, one or both of the IP66 stopping
plugs may be replaced with an appropriate IP
rated cable gland or conduit fitting.
Cable glands, conduit fittings, blanking plugs
and cables must be suitable for continuous use
at the maximum operating temperature.
d. Connect the field wiring to the terminals as
shown in Fig 7.
e. Replace the instrument terminal cover and
evenly tighten the two 'A' screws.
Fig 6 BA474D installation procedure

10
Fig 7 Dimensions and terminal connections
6.3 Associated apparatus installations
When used as associated apparatus the BA474D
transmitter must be installed a safe area and the
intrinsically safe input wiring, connected to terminals
1, 2, 3 & 4, must be segregated from the non-
intrinsically safe 4/20mA output wiring connected to
terminals 5 & 6.
An insulating partition separates the intrinsically safe
and non-intrinsically safe terminals within the
enclosure. Conductors of intrinsically safe circuits
and non-intrinsically safe circuits should not be
contained in the same cable and should enter the
terminal compartment via separate glands or conduit
entries. See EN 60079-14 section 12 for detailed
cable requirements.
6.4 EMC
The BA474D complies with the requirements of the
European EMC Directive 2004/108/EC. For specified
immunity, all wiring should be in screened twisted
pairs with the screens earthed at one point in the safe
area.

11
7. CONFIGURATION
The BA474D Indicating Temperature Transmitter
may be configured and calibrated via HARTdigital
communication, or configuration may be performed
using the menu accessed via the four push buttons
located behind the instrument switch cover, see
Fig 7. When frequent adjustments are required the
transmitter can be supplied with a keypad mounted
on the outside of this cover.
Configuration and calibration via HARTmay be
performed using a portable configurator connected
to the BA474D test pillars located by terminals 5 &
6, or by connecting to the galvanic isolator powering
the transmitter. Alternatively, proprietary
configuration software installed on a personal
computer may be used. In addition to the
configuration functions available via the transmitter
push buttons, HARTcommunication enables loop
calibration and custom linearisation to be
performed. See the BA47X/67X Indicating
Temperature Transmitter HARTInterface Guide
which may be downloaded from
www.beka.co.uk/manuals
.
7.1 Configuration menu
Throughout this manual the four BA474D push
buttons are identified P E ▼▲and legends
displayed by the transmitter are shown within
inverted commas e.g. ‘CAL’ and ‘dEG’. Section
7.1.2 contains a summary of each configuration
function including a cross reference to a more
detailed description.
The functions contained in the configuration menu
vary depending upon the transmitter input selected,
see Figs 8, 9 & 10.
When the transmitter is being configured, the
transmitter 4/20mA output current is locked at the
value prior to entering the configuration menu.
When the optional alarms are fitted additional
functions are added to the configuration menu which
are described in section 10.4.
7.1.1 Access
Access to the configuration menu is obtained by
operating the Pand Ebuttons simultaneously. If the
transmitter is not protected by an access code the
first parameter 'InPut’ will be displayed. If the
transmitter is protected by an access code, ‘CodE’
will be displayed first. Pressing Pwill allow the four
digit security code to be entered digit by digit using
the or button to adjust the flashing digit and Pto
move control to the next digit. When the correct code
has been entered, pressing Ewill cause the first
parameter ‘InPut’ to be displayed. If an incorrect
code is entered, or no button is pressed for ten
seconds, the transmitter will automatically return to
the operating mode. If the transmitter displays ‘LoC’
when the Pand Ebuttons are operated
simultaneously, the transmitter push buttons have
been locked by a HARTcommand see BA47X/67X
Indicating Temperature Transmitter HARTInterface
Guide which may be downloaded from
www.beka.co.uk/manuals.
7.1.2 Summary of functions
The functions that may be configured vary depending
upon the input selected.
Thermocouple and RTD inputs
The BA474D will always display sensor temperature.
Configuration allows:
Digital display units and resolution to be selected.
Bargraph display to represent required part of the
digital displayed range.
4/20mA output current to have required input
range.
Voltage and resistance inputs
The BA474D can display the voltage or resistance
input in any engineering units.
Configuration allows:
Zero and span of digital display to be adjusted.
Bargraph display to represent required part of the
digital displayed range.
4/20mA output current to have required input
range.
Each of the functions in the configuration menu is
summarised below, including a cross-reference to a
more detailed description.
Transmitter Summary
display of function
‘InPut’ Transmitter input
Selects one of the following inputs:
Thermocouple ‘tHC’
3 wire RTD ‘3rtd’
4 wire RTD ‘4rtd’
Differential RTD ‘d_rtd’
Voltage ‘Volt’
3 wire resistance ‘3rES’
4 wire resistance ’4rES’
See section 7.2.1
The content of the configuration menu depends upon
which transmitter input is selected, see following
summary and Figs 8, 9 and 10.

12
For Thermocouple Input – see Fig 8
Transmitter Summary
display of function
‘t.tYPE’ Thermocouple type
Selects 1 of 8 common types of
thermocouple.
See section 7.2.2
‘dEG’ Units of digital display
Selects 1 of 4 units of temperature.
See section 7.2.3
‘rESn’ Display resolution
Selects low or high display resolution.
See section 7.2.4
‘CJC’ Cold junction compensation
Turns thermocouple cold junction
compensation on or off.
See section 7.2.5
‘FAuLt’ Sensor fault analogue indication
Selects 1 of 3 under/over range output
currents to indicate that a sensor fault has
been detected. Sensor fault analogue
indication may be disabled.
See section 7.2.6
‘CAL’ Configuration of 4/20mA output
Defines transmitter input at which
transmitter output is 4 & 20mA.
See section 7.2.7
‘bAr’ Configuration of bargraph display
Defines digital display at which bargraph
is zero and full scale.
See section 7.2.8
‘CodE’ Access code for configuration menu
Enters four digit configuration menu
access code. Default code 0000 disables
this function.
See section 7.2.9
For Resistance Thermometer (RTD) Input see Fig 9
Transmitter Summary
display of function
‘r.tYPE’ Resistance thermometer type
Selects Pt100 or Pt1000 sensor
See section 7.2.10
‘dEG’ Units of digital display
Selects 1 of 4 units of temperature.
See section 7.2.3
‘rESn’ Display resolution
Selects low or high display resolution.
See section 7.2.4
Transmitter Summary
display of function
‘FAuLt’ Sensor fault analogue indication
Selects 1 of 3 under/over range output
currents to indicate that a sensor fault has
been detected. Sensor fault analogue
indication may be disabled.
See section 7.2.6
‘CAL’ Configuration of 4/20mA output
Defines transmitter input at which
transmitter output is 4 & 20mA.
See section 7.2.7
‘bAr’ Configuration of bargraph display
Defines digital display at which bargraph
is zero and full scale.
See section 7.2.8
‘CodE’ Access code for configuration menu
Enters four digit configuration menu
access code. Default code 0000 disables
this function.
See section 7.2.9
For Voltage and Resistance Inputs – see Fig 10
Transmitter Summary
display of function
‘dP’ Decimal point position
Defines position of displayed decimal
point.
See section 7.2.11
‘in-Lo’ Lower input and display
Defines lower voltage or resistance input
‘inVAL’ and corresponding digital display
‘diSP’.
See section 7.2.12
‘in-Hi’ Higher input and display
Defines higher voltage or resistance input
‘inVAL’ and corresponding digital display
‘diSP’.
See section 7.2.13
‘CAL’ Configuration of 4/20mA output
Defines the transmitter input at which
transmitter output is 4 & 20mA.
See section 7.2.7
‘bAr’ Configuration of bargraph display
Defines digital display at which bargraph
is zero and full scale.
See section 7.2.8
‘CodE’ Access code for configuration menu
Enters four digit configuration menu
access code. Default code 0000 disables
this function. See section 7.2.9

13
7.2 Description of configuration menu
functions
This section contains a detailed description of each
function in the configuration menu. It should be read
in conjunction with Figs 8, 9 &10.
7.2.1 Transmitter input ‘InPut’
This function enables the BA474D indicating
temperature transmitter to be conditioned to operate
with a thermocouple, 3 or 4 wire resistance
thermometer, voltage or 3 or 4 wire resistance input.
A differential resistance thermometer input may also
be selected. A differential thermocouple input is
achieved by selecting the thermocouple input in this
function and turning the cold junction compensation
off in the CJC function – see 7.2.5.
Sensor Transmitter
display
Thermocouple ‘tHC’
3 wire RTD ‘3rtd’
4 wire RTD ‘4rtd’
Differential RTD ‘d_rtd’
Voltage ‘VoLt’
3 wire resistance ‘3rES’
4 wire resistance ’4rES’
The ‘InPut’ function is the first function displayed
when entering the configuration menu, or it may be
selected from within the menu by operating the or
button. To enter the function press Pwhich will
reveal the existing setting which may be changed
using the or button. When the required input
has been selected press Eto enter the selection and
return to the ‘InPut’ prompt in the configuration menu.
7.2.2 Thermocouple type ‘t.tYPE’
This function enables one of eight common
thermocouples to be selected. The following table
shows the thermocouple types, indicator display and
the operating temperature range.
THC BA474D Temperature
Type Display range oC
B ‘b’ 200 to 1820
E ‘E’ -200 to 1000
J ‘J’ -210 to 1200
K ‘H’ -200 to 1372
N ‘n’ -200 to 1300
R ‘r’ -50 to 1768
S ‘S’ -50 to 1768
T ‘t’ -200 to 400
The ‘t.tYPE’ function may be selected from within the
menu by operating the or button. To enter the
function press Pwhich will reveal the existing setting
which may be changed using the or button.
When the required thermocouple has been selected,
press Eto enter the selection and return to the
‘t.tYPE’ prompt in the configuration menu.
7.2.3 Units of digital display ’dEG’
The transmitter digital display may be in one of four
units of temperature.
Units Transmitter Display
oC oC
oF oF
r r
K H
When oC or oF are selected the units of measurement
are shown at the top left hand corner of the display
when the transmitter is in the operating mode.
The ‘dEG’ function may be selected from within the
menu by operating the or button. To enter the
function press Pwhich will reveal the existing setting
which may be changed using the or button.
When the required units have been selected, press E
to enter the selection and return to the ‘dEG’ prompt
in the configuration menu.
7.2.4 Display resolution ‘rESn’
This function defines the resolution of the transmitter
display but does not affect the resolution of the
4/20mA output current.
Resolution Transmitter Display
Lo 0 0 0 0 0
Hi 0 0 0 0.0
The ‘rESn’ function may be selected from within the
menu by operating the or button. To enter the
function press Pwhich will reveal the existing setting
which may be changed using the or button.
When the required resolution has been selected,
press Eto enter the selection and return to the ‘rESn’
prompt in the configuration menu.
7.2.5 Cold junction compensation ‘CJC’
The temperature of the thermocouple cold junction,
which is the transmitter input terminals, is measured
and added to the thermocouple output so that the
transmitter displays and transmits the hot junction
temperature. If cold junction compensation is not
required e.g. for differential measurements with two
thermocouples, this function allows it to be turned off.
The ‘CJC’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will reveal the
existing setting which may be changed using the 
or button. When set as required, press Eto enter
the selection and return to the ‘CJC’ prompt in the
configuration menu.

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7.2.6 Sensor fault analogue indication ‘FAuLt’
The sensor fault analogue indication function appears
in the menu when the transmitter is configured for a
resistance thermometer or a thermocouple input.
When a fault is detected the transmitter’s 4/20mA
output current is set to the specified under or over
range fault value and the transmitter’s digital display
flashes. One of three fault currents may be selected,
or the fault indication may be turned off.
Irrespective of how the function is set the transmitter
display will flash when a sensor fault is detected.
Selected Output Transmitter
fault current current display
‘oFF’ No fault indication Flashes
‘dn3.6’ 3.6mA *Flashes
‘dn3.8’ 3.8mA Flashes
‘uP 21’ 21.0mA Flashes
* Not recommended when HART
communication is used.
The ‘FAuLt’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will reveal the
existing setting which may be changed using the 
or button. When set as required, press Eto enter
the selection and return to the ‘FAuLT’ prompt in the
configuration menu.
The typical detection thresholds and approximate
response times are:
Thermocouple > 5k10 sec
RTD sensor < 5>5001 sec
RTD sense leads > 5010 sec
In the time between a fault developing in an RTD
sense lead or a thermocouple and the fault being
detected, the transmitter output and display may drift
from the last correct measured value.
7.2.7 Configuration of 4/20mA output ‘CAL’
This function defines the relationship between the
transmitter input and the 4/20mA output current.
‘Zero’ defines the transmitter input at which the
output is 4mA and ‘Span’ defines the input at which
the output is 20mA.
This function does not affect the transmitter display
which is fixed for thermocouple and resistance
thermometer inputs and adjusted via the ‘in-Lo and
‘in-Hi’ functions for resistance and voltage inputs.
The ‘CAL’ function may be selected from within the
menu by operating the or button. To enter the
function press Pwhich will display the ‘ZEro’ function
in the sub-menu, pressing Pagain will reveal the
existing transmitter input at which the transmitter
output current is 4mA. Input is shown in units which
depend upon how the transmitter input ‘InPut’ and
display ‘dEG’ have been configured, as shown
below:
Configured Input
transmitter input shown as
Thermocouple oC, oF, K or r
Resistance thermometer oC, oF, K or r
Voltage mV
Resistance Ohms
The input, at which the transmitter output current is
4mA, may be changed using the or button to
adjust the flashing digit and the Pbutton to move
control to the next digit. When the required input has
been selected, press Eto enter the selection and
return to the ‘ZEro’ prompt.
The ‘SPAn’ function, which defines the input at which
the transmitter current output is 20mA, may be
selected from within the sub-menu by operating
either the or button. To enter the function press
Pwhich will reveal the existing transmitter input at
which the transmitter output current is 20mA. Again
the input will be shown in units which depend upon
how the transmitter has been configured.
The input, at which the transmitter output current is
20mA, may be changed using the or button to
adjust the flashing digit and the Pbutton to move
control to the next digit. When the required input has
been selected, press Eto enter the selection and
return to the ‘SPAn’ prompt.
Note: When configured for a voltage input, operating
the Pbutton when the 0.1mV digit is flashing in the
‘Zero’ or ‘SPAn’ sub-menus increases the input
resolution to 0.01mV which is indicated by the display
colon being activated. When the required input has
been selected, pressing Eenters the selection and
returns the transmitter to the ‘ZEro’ or ‘SPAn’ prompt
in the sub-menu.
If, when configured for a voltage or resistance input
the displayed decimal point has been set to
autorange, it may be necessary to manually position
the decimal point before adjusting ‘ZEro’ or ‘SPAn’.
This can be achieved by repeatedly operating the P
button until the activated decimal point flashes, the
decimal point can then be positioned using either the
or button. Pressing the Pbutton again will
return control to one of the digits.

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7.2.8 Configuration of bargraph display ‘bAr’
This function contains three sub-functions that justify
the bargraph display and define the relationship
between the bargraph and the transmitter digital
display.
Sub-function ‘b.tYPE’ enables the bargraph to be left,
centre or right justified, or to be turned off. Sub-
functions ‘bArLo’ and ‘bArhi’ define the transmitter
digital display at which the bargraph starts and is at
full scale.
The ‘bAr’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will display the
‘b.tYPE’ sub-function, pressing Pagain will reveal the
existing bargraph justification. The or button
will scroll through the four options, when the required
justification is displayed, pressing Ewill enter the
selection and return the display to the ‘b.tYPE’
prompt in the sub-menu from which ‘bArLo’ may be
selected using the or button.
‘bArLo’ defines the transmitter digital display at which
the bargraph starts, to enter the function press P
which will reveal the existing setting. The display
may be changed using the or button to adjust
the flashing digit and the Pbutton to move control to
the next digit. When the required starting display has
been selected, press Eto return to the ‘bArLo’ prompt
in the sub-menu from which the ‘bArhi’ function may
be selected.
‘bArHi’ defines the transmitter digital display at which
the bargraph is full scale, to enter the function press
Pwhich will reveal the existing setting. The display
may be changed using the or button to adjust
the flashing digit and the Pbutton to move control to
the next digit. When the required display has been
selected, press Etwice to return to enter the new
values and return to the ‘bAr’ prompt in the
configuration menu.
Note: If, when configured for a voltage or resistance
input the displayed decimal point has been set to
autorange, it may be necessary to manually position
the decimal point before adjusting ‘bArLo’ or ‘BarHi’.
This can be achieved by repeatedly operating the P
button until the activated decimal point flashes, the
decimal point can then be positioned using either the
or button. Pressing the Pbutton again will
return control to one of the digits.
7.2.9 Access code for configuration menu
‘CodE’
Access to the configuration menu may be protected
by a four digit security code which must be entered to
gain access. New instruments are supplied
configured with the default code 0000 which allows
unrestricted access to the menu.
To enter a new access code select ‘CodE’ in the
configuration menu by operating the or button.
To enter the function press Pwhich will reveal the
current access code with one digit flashing. The code
may be changed using the or button to adjust
the flashing digit and the Pbutton to move control to
the next digit. When the required code has been
selected, press Eto enter the selection and return to
the ‘CodE’ prompt in the configuration menu. The
revised access code will be activated when the
transmitter is returned to the operating mode.
If the access code is lost please contact BEKA
associates.
7.2.10 Resistance thermometer type ‘r.tYPE’
This function configures the BA474D to operate with
a Pt100 or Pt1000 resistance thermometer input.
The ‘r.tYPE’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will reveal the
existing setting which may be changed using the 
or button.
Resistance Transmitter
thermometer display
Pt100 100r
Pt1000 1000r
When the required resistance thermometer has been
selected, press Eto enter the selection and return to
the ‘r.tYPE’ prompt in the configuration menu.
7.2.11 Decimal point position ‘dP’
This function defines the position of the displayed
decimal point when the transmitter is configured for a
voltage or a resistance input.
This function does not appear in the configuration
menu when the transmitter is configured for a
thermocouple or a resistance thermometer input.
The ‘dP’ function may be selected from within the
menu by operating the or button. To enter the
function press Pto reveal the existing position of the
decimal point which may be moved to the required
position, or omitted, by operating the or button.
Autorange, which is selected when all the decimal
points are activated, ensures that the transmitter
numeric display is always shown with maximum
resolution irrespective of the value. When set as
required, press Eto enter the selection and return to
the ‘dP’ prompt in the configuration menu.

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7.2.12 Lower input & display ‘in-Lo’
This function, which only appears in the menu when
the transmitter is configured for a voltage or
resistance input, defines the transmitter lower input
voltage or resistance ‘inVAL’ and the corresponding
transmitter digital display ‘diSP’.
This function does not affect the transmitter output
current which is defined by the ‘CAL’ function.
The ‘in-Lo’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will display
‘inVAL’ in the sub-menu, pressing Pagain will reveal
the existing transmitter lower input voltage or
resistance. ‘InVAL’ is shown in units which depend
upon how the transmitter input ‘inPut’ has been
configured, as shown below:
Configured ‘inVAL’
transmitter input units resolution
Voltage mV 0.1 or 0.01mV
Resistance 0.1
‘inVAL’ may be adjusted using the or button to
adjust the flashing digit and the Pbutton to move
control to the next digit. When configured for a
voltage input, operating the Pbutton when the 0.1mV
digit is flashing increases the resolution to 0.01mV
which is indicated by the display colon being
activated. When the required input has been
selected, press Eto enter the selection and return to
the ‘inVAL’ prompt in the sub-menu.
‘diSP’ which is the transmitter display corresponding
to ‘inVAL’ may be selected from within the sub-menu
by operating either the or button. To enter the
function press Pwhich will reveal the existing lower
transmitter display. The display may be changed
using the and buttons to adjust the flashing digit
and the Pbutton to move control to the next digit.
The position of the displayed decimal point is set by
the dP function – see section 7.2.11. When the
required transmitter display has been selected, press
Etwice to enter the selection and return to the
configuration menu.
Note: When the displayed decimal point has been
set to autorange, it may be necessary to manually
position the decimal point before adjusting ‘inVAL’.
This can be achieved by repeatedly operating the P
button until the activated decimal point flashes, the
decimal point can then be positioned using either the
or button. Pressing the Pbutton again will
return control to one of the digits.
7.2.13 Higher input & display ‘in-Hi’
This function which only appears in the menu when
the transmitter is configured for a voltage or
resistance input, defines the transmitter higher input
voltage or resistance ‘inVAL’ and the corresponding
transmitter digital display ‘diSP’.
This function does not affect the transmitter output
current which is defined by the ‘CAL’ function.
The ‘in-Hi’ function may be selected from within the
configuration menu by operating the or button.
To enter the function press Pwhich will display
‘inVAL’ in the sub-menu, pressing Pagain will reveal
the existing transmitter higher input voltage or
resistance. ‘InVAL’ is shown in units which depend
upon how the transmitter input ‘inPut’ has been
configured, as shown below:
Configured ‘inVAL’
transmitter input units resolution
Voltage mV 0.1 or 0.01mV
Resistance 0.1
‘inVAL’ may be adjusted using the or button to
adjust the flashing digit and the Pbutton to move
control to the next digit. When configured for a
voltage input, operating the Pbutton when the 0.1mV
digit is flashing increases the resolution to 0.01V
which is indicated by the display colon being
activated. When the required input has been
selected, press Eto enter the selection and return to
the ‘inVAL’ prompt in the sub-menu.
‘diSP’ which is the transmitter display corresponding
to ‘inVAL’ may be selected from within the sub-menu
by operating either the or button. To enter the
function press Pwhich will reveal the existing higher
transmitter display. The display may be changed
using the or button to adjust the flashing digit
and the Pbutton to move control to the next digit.
The position of the displayed decimal point is set by
the dP function – see section 7.2.11. When the
required transmitter display has been selected, press
Etwice to enter the selection and return to the
configuration menu.
Note: When the displayed decimal point has been
set to autorange, it may be necessary to manually
position the decimal point before adjusting ‘inVAL’.
This can be achieved by repeatedly operating the P
button until the activated decimal point flashes, the
decimal point can then be positioned using either the
or button. Pressing the Pbutton again will
return control to one of the digits.

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