Labom CI4 Series User manual

Pressure transmitter PASCAL Ci4
Type Series CI4xxx
 Questions about this device? Hotline [phone] - 444
LABOM Mess- und Regeltechnik GmbH Im Gewerbepark 13 27798 Hude Deutschland
Tel.: [phone] Fax: [phone] e-mail: [email protected] www.labom.com
BA_072
Rev 1J3
Seite 1/24
Operating Instructions
1General Information ......................................................................................................2
1.1General Safety Notes..............................................................................................2
1.2Intended Use...........................................................................................................2
1.3Conformity with EU Regulations..............................................................................2
2Transportation and Storage..........................................................................................2
3Installation and Commissioning ..................................................................................2
3.1Mechanical Installation............................................................................................2
3.2Electrical Connection ..............................................................................................3
3.3Devices with Diaphragm Seal .................................................................................3
3.4Mounting the Remote Display .................................................................................3
4Operation........................................................................................................................5
4.1Test Terminals ........................................................................................................5
4.2Remove Display / Activate Write Protection............................................................5
4.3Maintenance / Service.............................................................................................6
5Disassembly...................................................................................................................6
6User Manual ...................................................................................................................7 
6.1Basics of the Operating Concept.............................................................................7
6.2Display Mode / Measured Value Display.................................................................8
6.3Menue Mode / Operating Menue...........................................................................11
6.4The Menue Tree....................................................................................................13

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1 General Information
This document contains necessary information for the proper installation and use of this
device. In addition to this instruction, be sure to observe all statutory requirements,
applicable standards, the additional technical specifications on the accompanying data
sheet (see www.labom.com) as well as the specifications indicated on the type plate.
1.1 General Safety Notes
The installation, set up, service or disassembly of this device must only be done by
trained, qualified personnel using suitable equipment and authorized to do so.
Warning
Media can escape if unsuitable devices are used or if the installation is not
correct.
Danger of severe injury or damage
Ensure that the device is suitable for the process and undamaged.
1.2 Intended Use
The device is intended to measure pressure of gases, vapors and liquids as specified in
the data sheet.
1.3 Conformity with EU Regulations
The CE-marking on the device certifies its compliance with the applicable EU Directives for
placing products on the market within the European Union.
The following guidelines apply to these devices:
EMC Directive 2004/108/EC
PED Directive 97/23/EC
You find the complete EC Declaration of Conformity (document no. KE_042) at
www.labom.com.
2 Transportation and Storage
Store and transport the device only under clean and dry conditions preferrably in the
original packaging. Avoid exposure to shocks and excessive vibrations.
Permissible storage temperature: -40…80 °C
3 Installation and Commissioning
Ensure that the device is suitable for the intended application with respect to pressure
range, overpressure limit, media compatibility, temperature range and process connection.
After the mechanical installation and electrical connection is completed, the device is
ready for operation as soon as the power supply is switched on.
3.1 Mechanical Installation
Use gaskets, if required, that are suitable for the process connection and resistant to the
media.
Before starting operation, check the process connection carefully for leaks under pressure.

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You can use the device in any mounting position. Normally the transmitter is adjusted for a
vertical mounting position. A different mounting position in combination with a small
nominal range might cause a zero point offset. In this case a zero point adjustment might
be necessary.
3.2 Electrical Connection
Complete the mechanical installation before you connect the device electrically.
Set up all electrical connections while the voltage supply is switched off.
Output (2-wire) 4...20 mA (20...4 mA)
Permissible supply voltage UV= 12…30 VDC
Permissible load RB≤(UV- 12 V) / 22 mA
Circular connector M12 Cable gland
( )
(+)
(-)
n.c.
12...30 V
0 V
Bild 1: Options for the electrical connection
Observe the following points regarding for electrical connections via cable gland and
terminal block:
Do not forget to tighten the cable gland after the electrical connection is finalised.
Press down the spring of spring-operated terminals as far as possible, e.g. with a
screwdriver, before you insert the cable. Otherwise a safe electrical connection
cannot be ensured.
3.3 Devices with Diaphragm Seal
Remove the protective cap or protective wrapping from the diaphragm only just before
installation to prevent contamination or damage.
The diaphragm must not be touched. Do not place the device on its diaphragm. Even
small scratches or deformations may negatively influence the zero point or other
characteristics of the device.
Pressure transmitter and diaphragm seal are a closed system that must not be separated.
You can find further information about diaphragm seals in the document TA_031 on
www.labom.com.
3.4 Mounting the Remote Display
Optionally you can mount the display and control unit up to 10 m away from the measuring
point in an additional housing. The back plate of the housing is universally suitable for wall

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mounting or pipe mounting for pipe diameters from 30 – 64 mm. For pipe mounting, you
can order the corresponding U-bolts from LABOM.
For best EMC protection, only use the included cable.
If you ordered the remote display together with the device, the assembly has been
completed in the factory. You only need to route the cable and mount the housing with the
remote display.
If you have received the remote display as a retrofit kit, proceed as follows:
1. Unmount the front cover and the display unit from the PASCAL Ci4 (see 4.2).
2. Replace them with the adapter piece (round part with M12 socket) and front cover,
which were screwed onto the remote display housing for shipment. Do not forget to
connect the cable on the back with the display connector on the CPU module.
3. The cable may be shortened to on-site requirements. Colour codes on the terminals
indicate which wire should be connected to which terminal (see Figure 2).
4. Mount the remote display housing using the mounting holes to a wall, a pipe or another
suitable location.
5. Plug the M12 connector of the cable into the socket of the adapter piece.
6. Now connect the cable on the display module with the corresponding connector on the
terminal board in the remote housing and insert the display module in the same
manner as for the device itself (see 4.2).
7. The last step is to close the remote housing with the display cover that was previously
on the device.
1_BN/BR
2_WH/WS
3_BU/BL
4_BK/SW
Colour codes
BN/BR: Brown
WH/WS: White
BU/BL: Blue
BK/SW: Black
Figure 2: Connection of the remote display housing
This modification can be performed during operation. We do recommend, however, to
switch off the device during the modification.

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max. 10 m
Figure 3: Remote display and control unit after installation
4 Operation
During operation, take care that the device remains within its intended pressure and
temperature ranges. No other monitoring is necessary.
Permissibe ambient temperature: -40…80 °C
4.1 Test Terminals
You can check the output current without interrupting the current loop, using the test
terminals on the terminal board. When you connect a current meter to the "+Test" and "-
Test" terminals, the current is automatically routed through it.
12...30 V
0 V
A
Figure 4: Current measurement during operation using test terminals
4.2 Remove Display / Activate Write Protection
Using the DIP switch in the device, you can disable changes to the configuration via the
display or via HART.
To activate the write protection, you must first remove the display module. Proceed as
follows:
Unscrew the front cover
Turn the display module 20° counterclockwise
Lift off the display module carefully

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unscrew front cover turn display module 20° remove display module
Figure 5: Removing the display
After removing the display module you can reach the DIP switch on the CPU module. The
write protection is active when the DIP switch is in the "ON" position.
position
write protection „ON“
position
write protection „OFF“
Figure 6: Write protection via slide switch in the device
Re-mount the display module in the reverse order.
4.3 Maintenance / Service
When properly installed in accordance with applicable specifications, this device is
maintenance-free. However, we recommend an annual recalibration of the device.
In case of damage or defects, the customer can replace the following elements:
Display module
Cable glands (if applicable)
For defects to other components, repairs must be performed in the factory.
5 Disassembly
When measuring hot media, make sure that the device has cooled down prior to any
dismounting or wear appropriate protective clothing to avoid burns.
Switch off the power supply to the device before disconnecting the electrical connections.
Once this is done, the device may be mechanically removed.

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Warning
Opening pressurized lines might cause severe injuries.
Danger of severy injuries or damage
Relieve the process pressure before attempting to remove the device.
Shut off the pressure supply for all feed lines to the device and relieve the
pressure in them.
Warning
Hazardous deposits and residues might remain on opened process
connections and removed devices.
Danger of injury
After the device has been removed, seal off the measuring point and
mark the open process connection accordingly. Consider a possible
danger due to residues when handling the removed device.
6 User Manual
The device can be configured via the display module as well as the HART protocol. The
following pages describe operation and configuration of the device using the display
module.
An overview of the menue structure can be found on the last page of this document.
6.1 Basics of the Operating Concept
The display module consists of a dot-matrix
display with 80x120 pixels as well as a
4-button control panel.
The four buttons below the display allow an
intuitive operation of the device. The
general functionality of the buttons is
identical in all operating modes.
Figure 7: Control elements
If you press and hold the up or down button, it will automatically be triggered multiple
times. This allows to easily navigate through longer selection lists. If you press and hold
the ESC button, you always return to the measured value display.
Button Function
/ Select function, increase/decrease value
OK Confirm selected function or selected value
ESC Cancel action
ESC long Return to measured value display
Table 1: General button functions

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The structure of the display is the same in every operating mode. The display area is
divided into four zones:
Header
Icon indicating device status
Data area
Bar graph related to the currently measured value
Header
Icon
Data area
Bar graph of
measured value
Figure 8: Display Structure
The icon for the device status (see 6.2.2) as well as the bar graph is displayed in each
operating mode. The bar graph always shows the measured pressure value in per cent of
the pre-set measuring range. The contents of the header and the data area depend on the
operating mode:
Display of measured value
Header: Icon description, if applicable. Otherwise "Value"
Data area: Measured values and parameters according to the selected display
mode (see 6.2.3)
Display of device data (see 6.2.1)
Header: Title for the displayed device data
Data area: Device data
Operating menue
Header: Selected menue item
Data area: Submenue or dialogue during setting procedure
6.2 Display Mode / Measured Value Display
After applying the supply voltage and completion of the initialisation, the device switches to
the display mode. In the display, the currently measured value is shown.
If the measured value is larger than the displayable number due to setting a fixed decimal
point, the largest displayable number is shown flashing.

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6.2.1 Quick Access to Device Data
You can access a number of device parameters directly from the measured value display
using the / -buttons. This allows a quick overview of the device configuration.
With the -button you can display variable data (trailing pointers and counters), with the
-button static information such as configuration data.
From any screen of the device data, you can enter the operating menue with OK and go
back to the measured value display by pressing ESC.
Button Function
/ Scroll through the pages with device data
OK Go to the operating menue
ESC Return to measured value display
Table 2: Button functions in display mode
The sequence of the screens with device data is as follows:
Counter (operating hour counter, maintenance timer)
Trailing pointer (pressure and sensor temperature)
----- Measured value display (starting point) ---
Pressure measurement (rel/abs, nominal range, measuring range, damping)
Current output (characteristic curve, alarm current, limits)
HART data (address, tag, descriptor, date)
Device identification (device ID, order number, serial number)
Module information (hardware and software versions, serial numbers)
6.2.2 Icons indicating device status
In the top right corner of the display, depending on the device status an NE107-conform
icon is displayed. The following icons are defined:
Error/failure Critical error, alarm current is activated
The error description is indicated in the display. The
operating menue can still be opened.
Warning Temperature or pressure limits are exceeded.
Saturation The pre-set upper or lower current limit was reached at the
current output.
Function control The current output corresponds to the pressure or current
simulation, but not to the applied pressure value.
Maintenance The device indicates necessary maintenance due to
maintenance timer settings (see 6.4.7.2).
Write protection The write protection of the device was activated via the
DIP switch (see xxx).
Table 3: Icons for device state

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The list of icons is sorted in descending priority. Only the icon with the highest priority is
shown. The two most important icons for fault and/or warning are flashing when displayed.
6.2.3 Display layouts
You can configure the layout of the measured value display as well as the displayed
information individually. There are five different layouts available:
Designation Layout Description Example
Five values
2nd value 3rd value
4th value 5th value
1st value
Under the main value, four additional
values are shown.
Four values
1st value
2nd value 3rd value
4th value
Under the main value, three additional
values are shown. One of these can use
the entire display width.
Three values
1st value
3rd value
2nd value
Under the main value, two additional
values are shown. Both of them can use
the entire display width.
Two values
1st value
2nd value
Two values are shown in the same size,
one under the other.
Large display
1st value
2nd value
unit
The main value is shown at the
maximum size (best readability from a
distance). One additional value can also
be shown.
Table 4: Display layouts
You can define what information shall be shown in the layout’s placeholders.
You can select the 1st value (main value) from the following data:
1. Pressure with the selected unit
2. Pressure in per cent of the measuring range
3. Pressure in milliampere of the output signal
4. Sensor temperature
For all further values, you can additionally choose from the following data:
Device ID (see 6.4.10.1)
HART tag
HART descriptor
When information (such as the device ID) cannot be displayed in a short layout
placeholder, "###" appears on the screen. Then select another layout or assign the value
to a longer layout placeholder.
You can configure the display mode in the operating menue (see 6.4.4.3).

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6.3 Menue Mode / Operating Menue
Press OK in the measured value display to go to the operating menue. Then the main
menue appears in the display.
In the operating menue you can navigate in the menus by using the arrow buttons. The
selected menue item is indicated by triangles on the left and right. The OK button selects
the menue item or switches to the corresponding submenue. You can return to the higher-
level menue by pressing ESC. From the main menue, pressing ESC returns to the
measured value display.
From every position in the operating menue, you can return to the measured value display
by pressing and holding the ESC button (for at least one second).
OK
ESC
ESC OK
ESC
ESC long
Figure 9: The Operating menue
In long menus and selection lists, a scroll bar on the left side shows the position of the
currently selected item.
Menue items that open a setting dialogue differ from submenus by three trailing points,
e.g. "Lower range …" (setting dialogue) and "System" (submenue).
If no button is pressed in menue mode for five minutes, the device automatically returns to
the display mode without saving any values.
Button Function
Scroll up in the menue, increase value/position in list
Scroll down in the menue, decrease value/position in list
OK Select menue, confirm value/list entry
ESC Cancel the data entry or menue selection, return to the next higher menue
ESC
long
Cancel menue mode, return to display mode
Table 5: Button functions in the operating menue
Numeric values and selection lists are handled differently, when entering parameters.

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6.3.1 Selection of a value from a selection list
When opening a selection list, the currently set value is shown above the selection list. Up
to three entries are shown at the same time. When the selection list is longer, a scroll bar
on the left side of the display indicates the position of the selected item in the selection list.
set
value
selection
list
scroll bar
for orientation
in long
selection lists
Figure 10: Elements of a selection list
When you press the ESC button, you cancel the entry and go back to the menue entry.
The selected value is not saved.
With the OK button, the selected value is saved. Saving the value is confirmed with an
information window (see below) and the new value is shown above the selection list.
With ESC, you leave the selection list after saving. If you press and hold the ESC button,
you go back to the display mode.
OK
ESC
ESC
ESC
long
ESC
OK
Figure 11: Procedure for value selection (e.g. conversion from mbar to bar)
6.3.2 Setting a numeric value
When setting numeric values, the screen shows the following elements (from top to
bottom):
Description of the parameter that can be set
Help text
Numeric value
Unit
Bargraph

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help text
unit
numeric value
parameter designation
bar graph
Figure 12 Elements when setting a numeric value
After selecting a menue item for numerical entry (e.g. upper range value), at first the value
is only displayed. The numeric value itself is shown in square brackets and its the unit
below. Unused leading digits are marked with bottom lines. You need to press OK again to
enter the edit mode.
Numeric values are entered digit by digit. First, always the leftmost digit is selected (visible
with two triangles above and below the number). By pressing OK, you go to the next digit.
You change the selected digit by pressing the or button. The higher value digit is
also increased or decreased when passing zero. For instance, you can easily go from 19
to 20 without having to edit two digits.
Lower value digits are not influenced, unless the parameter limit is reached. The value is
then set to the parameter limit.
You can set negative numbers by reducing the leftmost digit below zero.
When you press the ESC button, you can cancel the entry at any time and return to the
display of the set value. Any change of the value is not saved.
With the OK button you confirm the set digit value and jump to the next digit.
When you confirm the rightmost digit, the entire value is saved. You can save the new
value from any digit by pressing and holding the OK button.
OK
OK
long
OK
Figure 13: Procedure for number entry (e.g. changing from 4.0000 to 2.9000)
6.4 The Menue Tree
In the following, the display and adjustment options are described by their position in the
menue tree. An overview of the menue tree can be found on the last page of this
document.

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6.4.1 Main menue
The main menue has the following entries:
Menue entry Description
Quick setup Selection of the most important settings
Adjustment Adjustment functions for pressure measurement and current
output
Display Functions for configuring the display
Measurement Configuration of the pressure measurement
Current output Configuration of the current output
Diagnosis Diagnostic information such as trailing pointers, etc.
Simulation Simulation of pressure and current for function check of the
measurement chain
Communication Information and settings regarding HART communication
System Device data and function such as factory reset
Table 6: The main menue
6.4.2 "Quick Setup" menue
In Quick Setup, basic configuration options are combined to make it possible to quickly
configure key functions. All functions of the quick setup can also be found at another
position in the menue tree.
The following functions are available in the Quick Setup menue:
Menue entry Description
Sprache/Language Select menue language (German or English)
Unit Pressure Select unit for measured pressure (see 6.4.4.1)
Unit Temperature Select unit for sensor temperature (see 6.4.4.2)
Lower Range Value Setting of the pressure value that should correspond to 4 mA
(start of range) (see 6.4.5.1)
Upper Range Value Setting of the pressure value that should correspond to 20 mA
(end of range) (see 6.4.5.1)
Damping Setting the damping of the output signal (see 6.4.5.2)
Device ID Setting the device ID (see 6.4.10.1)
Table 7: "Quick Setup" menue

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6.4.3 "Adjustment" menue
The following functions are available for the pressure adjustment:
Menue entry Description
Zero Point Set device at ambient pressure to zero (0 bar rel) (only for
devices measuring gauge pressure)
Position Correction Correct zero point error due to installation position (only for
devices measuring gauge pressure)
Lower Adjustment Offset correction with applied reference pressure
Upper Adjustment Span correction with applied reference pressure
Table 8: "Pressure Adjustment" menue
6.4.3.1 Zero-point correction
The zero-point correction requires a non-pressurized pressure port e.g. during calibration
in the lab. When executing this function the applied pressure will be interpreted as zero bar
relative pressure.
The zero point correction results in an offset of the whole characteristic curve. Therefore it
is a special case of the lower adjustment (see below).
6.4.3.2 Position correction
Using the function "Position Correction", you can correct the offset error due to the
installation position independent of the zero-point offset.
In the corresponding submenue, you will find the following entries:
Menue entry Description
Pos.Corr. On/Off Activate/deactivate position correction
Set Pos. Corr. Correct position error at ambient pressure
Table 9: "Position Correction" submenue
When you set the position correction, it will be activated automatically. You can deactivate
the position correction, for instance for a subsequent calibration to check the zero point
independently from the installation position.
6.4.3.3 Upper and lower adjustment
The lower adjustment results in an offset of the characteristic curve. It thus affects zero
and span of the measuring range.
The upper adjustment changes the slope of the characteristic curve by correcting the span
of the measuring range.
Execute the lower adjustment prior to the upper adjustment for a correct full adjustment.

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true
pressure
measured
pressure 1) misaligned
characteristic curve
2) characteristic curve
after lower calibration
(offset shift)
3) characteristic curve
after upper calibration
(span correction)
LRV URV
LRV
URV
Figure 14: Effect of the upper and lower adjustment on the characteristic curve
You can perform the upper and lower adjustment at any reference pressure level. For
instance, you can perform the lower adjustment of a -1…4 bar device at -900 mbar rel.
The reference pressure level for the upper offset can also be freely chosen. For an exact
adjustment, however, it should be as close to the upper range value as possible.
6.4.3.4 Current adjustment
You can use the current adjustment, if the reading at the end of the measurement chain
does not correspond to the measured pressure. With this function you can compensate
deviations in the output stage as well as the downstream measurement chain.
Proceed as follows (example for 4 mA):
Select function "Current adjustment" –> "4mA"
Use "OK" to activate constant current mode (4 mA). CAUTION! The output current
value now no longer corresponds with the measured pressure! This is indicated by
the icon "Function check" (see 6.2.2)
Read the displayed current value at the end of the measurement chain.
Enter this current value (e.g. 3.996) at the device. The device now corrects the
current output so that 4 mA are shown at the end of the measurement chain.
When leaving the function, the constant current mode is disabled and the current value
corresponds again to the measured pressure.

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6.4.4 "Display" menue
In the "Display" menue, you find all the settings that affect the display on the screen.
Menue entry Description
Language Select menue language (German or English)
Unit Pressure Select unit for measured pressure
Unit Temperature Select unit for sensor temperature
Display Mode Configuration of the display layout and content (see 6.2.3)
Decimal point Selection of the decimal places by specifying the decimal point
Backlight Switch backlight on/off
Table 10: "Display" menue
6.4.4.1 "Unit Pressure" submenue
The unit in which the measured pressure is to be shown can be selected from the following
list:
Unit Description
mbar Millibar (1 mbar = 0.001 bar)
bar Bar (1 bar = 1000 mbar = 105Pa)
Pa Pascal (1 Pa = 1 kg/(m*s2) = 10-5 bar = 0.01 mbar)
hPa Hectopascal (1 hPa = 100 Pa = 1 mbar)
kPa Kilopascal (1 kPa = 1,000 Pa = 10 mbar)
MPa Megapascal (1 MPa = 1,000,000 Pa = 10 bar)
g/cm2Gram per square centimetre (1 g/cm2= 0.981 mbar)
kg/cm2Kilogram per square centimetre (1 kg/cm2= 0.981 bar)
psi Pound force per square inch (1 psi = 68.9 mbar)
atm Atmospheric pressure (1 atm = 1013 mbar)
mmH2O Millimetre water column (1 mmH2O = 0.0981 mbar)
mH2O Metre water column (1 mH2O = 98.1 mbar)
inH2O Inch water column (1 inH2O = 2.49 mbar)
ftH2O Foot water column (1 ftH2O = 29.84 mbar)
torr Torr (1 Torr = 1 mmHg = 1.33 mbar)
mmHg Millimetre mercury column (1 mmHg = 1.33 mbar)
inHg Inch mercury column (1 inHg = 33.86 mbar)
Table 11: Possible units for pressure
The shown conversions are only meant for your orientation. The device uses conversion
values with ten decimal places.

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Please note that units can only be selected for nominal ranges that the device can
display. For instance, the unit Pascal is hidden for nominal ranges above 1 bar.
The unit selection in this submenue only affects the display on the screen. Communication
via HART is performed using the unit set in the HART driver.
6.4.4.2 "Unit Temperature" submenue
The unit in which the sensor temperature is to be shown can be selected from the
following list:
Unit Description
°C Degree Celsius
°F Degree Fahrenheit ( TFahrenheit = TCelsius*1.8 + 32 )
°R Degree Rankine ( TRankine = TKelvin*1.8 )
K Kelvin ( TKelvin = TCelsius + 273.15 )
Table 12: Possible units for temperature
6.4.4.3 "Display Mode" submenue
In the "Display Mode" submenue, you configure the representation of the measured values
and additional information on the display.
With the menue item “Screen Layout” you configure the information that is displayed and
its layout. Up to five values can be displayed at the same time. In the additional menue
entries "1st value" to "5th value" you define the contents of the placeholders in the layout.
The various layouts as well as the possible content of the values are described in Chapter
6.2.3.
6.4.5 "Measurement" menue
In the "Measurement" menue, you configure the pressure measurement.
Menue entry Description
Lower Range Value Setting of the pressure value that shall correspond to 4 mA (start
of range)
Upper Range Value Setting of the pressure value that shall correspond to 20 mA (end
of range)
Damping Setting the damping of the output signal
Measuring rate Setting of the measuring rate (20 or 100 Hz)
Table 13: "Measurement" menue
6.4.5.1 Setting the measurement range
You can freely set the lower and upper range value within the nominal range of the device,
as long as the set range is not smaller than 1% of the nominal range (turndown 100:1).
Please note that when the turndown is increased, the measurement error also increases. If
you use a very small range you must therefore accept a significant measurement error.
We recommended a maximum turndown of 10:1.
The lower range value must be below the upper range value. For an inverse characteristic
curve, select the setting "inverse" under "Current output" -> "Output Function" (see 6.4.6).

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6.4.5.2 Setting the damping
Using an adjustable damping you can eliminate fast pressure changes or peaks from
having direct influence to the output signal. The set value in seconds corresponds to the
time constant of an exponential rise. After a suddon pressure change, it takes the
damping time to reach 63.2% of the actual pressure at the output. After the damping time
has elapsed three times, 95% of the pressure is reached.
10 2345
63,2%
95,0%
100,0%
0,0%
τ
actual pressure
pressure value
at current output
due to damping
Figure 15: Damping effect
The damping affects the current output as well as the displayed pressure value.
6.4.5.3 Setting of the measuring rate
When shipped, the transmitter is set to a measuring rate of 20 Hz, i.e. 20 times per second
the pressure is measured and the current is calculated and imprinted in the current loop.
When a particularly fast measuring rate is required, for instance to detect pressure peaks,
you can increase the measuring rate to 100 Hz. This can lead to the following restrictions:
Communication via HART can be disturbed by fast pressure changes.
The measuring signal can be noisier.
For this reason, you should only increase the measuring rate to 100 Hz if necessary for the
application.

BA_072 Rev 1J3 Pressure transmitter PASCAL Ci4 Seite 20/24
6.4.6 "Current Output" menue
In the "Current Output" menue, you configure all aspects of the current loop.
Menue entry Description
Output function Setting the output function (linear, inverse, square root, table)
Table Specifying the interpolation points for the table function
Alarm current Selection of the alarm current: High (>21 mA) or low (<3.6 mA)
Lower current limit Limit of the lower output current (3.8…4.0 mA)
Upper current limit Limit of the upper output current (20…21 mA)
Table 14: "Current Output" menue
Independent from the setting of the upper and lower current limit, the set measuring range
always corresponds to a current range of 4..20 mA.
6.4.6.1 Configuration of the table function
With the table function you can realise any output function. E.g. you can convert the fill
height to the fill quantity depending on the tank shape. You can use up to 64 interpolation
points for this purpose.
Menue entry Description
Number of Points Number of interpolation points
Table values Combination of pressure in per cent and corresponding current
value that are used as interpolation points of the table function
Table 15: "Output Table" submenue
You can only edit the table points when the table function is not active. You may need to
set the output function to "linear", for instance (see above) before editing table points.
The table points must be sorted according to ascending pressure. For instance, the 20%
point may not be before the 10% point. Otherwise you cannot activate the table function.
If the first table point is set above 0%, the output of the actual current will not change
before the pre-set value of the first table point is reached. Until then, only the value of the
first table point will be output. If, for instance, the first table point is set to 10% and 5 mA,
the device outputs 5 mA from 0-10% of the set measuring range. The same applies when
the last table point is not at 100%.
With the and buttons, you can scroll through the table points and look at the
combinations of pressure in per cent and current in mA. With OK, you switch to the edit
mode for the displayed table point. Now enter the first per cent value and then the current
value. When you confirm the current value, you return to the display of the table point you
just edited.