Fluidwell F151-A User manual

F151-A
DUAL PRESSURE INDICATOR
Signal input sensors: (0)4-20mA
Options: Intrinsically Safe, Modbus communication

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SAFETY INSTRUCTIONS
Any responsibility is lapsed if the instructions and procedures as described in this
manual are not followed.
LIFE SUPPORT APPLICATIONS: The F151-A is not designed for use in life support
appliances, devices, or systems where malfunction of the product can reasonably be
expected to result in a personal injury. Customers using or selling these products for use
in such applications do so at their own risk and agree to fully indemnify the manufacturer
and supplier for any damages resulting from such improper use or sale.
Electro static discharge does inflict irreparable damage to electronics! Before installing
or opening the unit, the installer has to discharge himself by touching a well-grounded
object.
This unit must be installed in accordance with the EMC guidelines (Electro Magnetic
Compatibility).
Do connect a proper grounding to the aluminum casing as indicated if the F151-A has
been supplied with the 115-230V AC power-supply type PM. The green / yellow wire
between the back-casing and removable terminal-block may never be removed.
Intrinsically Safe applications: follow the instructions as mentioned in Chapter 5 and
consult “Fluidwell F1..-..-XI - Documentation for Intrinsic Safety”.
DISPOSAL
At the end of its life this product should be disposed of according to local regulations regarding
waste electronic equipment. If a battery is present in this product it should be disposed of
separately. The separate collection and recycling of your waste equipment will help to conserve
natural resources and ensure that it is recycled in a manner that protects the environment.
SAFETY RULES AND PRECAUTIONARY MEASURES
The manufacturer accepts no responsibility whatsoever if the following safety rules and
precautions instructions and the procedures as described in this manual are not followed.
Modifications of the F151-A implemented without preceding written consent from the
manufacturer, will result in the immediate termination of product liability and warranty period.
Installation, use, maintenance and servicing of this equipment must be carried out by authorized
technicians.
Check the mains voltage and information on the manufacturer's plate before installing the unit.
Check all connections, settings and technical specifications of the various peripheral devices
with the F151-A supplied.
Open the casing only if all leads are free of potential.
Never touch the electronic components (ESD sensitivity).
Never expose the system to heavier conditions than allowed according to the casing
classification (see manufacture's plate and chapter 4.2.).
If the operator detects errors or dangers, or disagrees with the safety precautions taken, then
inform the owner or principal responsible.
The local labor and safety laws and regulations must be adhered to.

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ABOUT THE OPERATION MANUAL
This operation manual is divided into two main sections:
The daily use of the unit is described in chapter 2 "Operation". These instructions are meant for
users.
The following chapters and appendices are exclusively meant for electricians/technicians. These
provide a detailed description of all software settings and hardware installation guidance.
This operation manual describes the standard unit as well as most of the options available. For
additional information, please contact your supplier.
A hazardous situation may occur if the F151-A is not used for the purpose it was designed for
or is used incorrectly. Please carefully note the information in this operating manual
indicated by the pictograms:
A "warning" indicates actions or procedures which, if not performed correctly, may lead to
personal injury, a safety hazard or damage of the F151-A or connected instruments.
A "caution" indicates actions or procedures which, if not performed correctly, may lead to
personal injury or incorrect functioning of the F151-A or connected instruments.
A "note" indicates actions or procedures which, if not performed correctly, may indirectly
affect operation or may lead to an instrument response which is not planned.
Hardware version : 02.01.xx
Software version : 02.01.xx
Manual : HF151AEN_v0501_04
© Copyright 2011 : Fluidwell bv - The Netherlands.
Information in this manual is subject to change without prior notice. The
manufacturer is not responsible for mistakes in this material or for incidental
damage caused as a direct or indirect result of the delivery, performance or
use of this material.
© All rights reserved. No parts of this publication may be reproduced or used
in any form or by any means without written permission of your supplier.

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CONTENTS MANUAL
Safety instructions ...........................................................................................................................................2
Safety instructions ...........................................................................................................................................2
Disposal ....................................................................................................................................................2
Safety rules and precautionary measures.......................................................................................................2
About the operation manual ............................................................................................................................3
Contents manual..............................................................................................................................................4
1. Introduction .................................................................................................................................5
1.1. System description of the F151-A..........................................................................................5
2. Operational..................................................................................................................................7
2.1. General ..................................................................................................................................7
2.2. Control panel..........................................................................................................................7
2.3. Operator information and functions .......................................................................................8
3. Configuration...............................................................................................................................9
3.1. Introduction ............................................................................................................................9
3.2. Programming SETUP-level....................................................................................................9
3.2.1. General ..................................................................................................................................9
3.2.2. Overview functions SETUP level.........................................................................................12
3.2.3. Explanation SETUP-functions..............................................................................................13
1 - PRESSURE - A .........................................................................................................13
2 - PRESSURE - B .........................................................................................................14
3 - Display.......................................................................................................................14
4 - Power management ..................................................................................................15
5 - Sensor - A..................................................................................................................15
6 - Sensor - B..................................................................................................................17
7 - Communication (optional)..........................................................................................19
8 - Others........................................................................................................................19
4. Installation.................................................................................................................................20
4.1. General directions................................................................................................................20
4.2. Installation / surrounding conditions ....................................................................................20
4.3. Dimensions- Enclosure........................................................................................................21
4.4. Installing the hardware.........................................................................................................23
4.4.1. Introduction ..........................................................................................................................23
4.4.2. Voltage selection sensor supply ..........................................................................................24
4.4.3. Terminal connectors ............................................................................................................25
5. Intrinsically safe applications.....................................................................................................27
5.1. General information and instructions...................................................................................27
5.2. Terminal connectors Intrinsically Safe applications.............................................................28
5.3. Configuration examples Intrinsically Safe applications........................................................30
5.4 Battery replacement instructions..........................................................................................32
6. Maintenance..............................................................................................................................33
6.1. General directions................................................................................................................33
Appendix A: Technical specification..............................................................................................................34
Appendix B: Problem solving.........................................................................................................................37
Appendix C: Communication variables..........................................................................................................38

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1. INTRODUCTION
1.1. SYSTEM DESCRIPTION OF THE F151-A
Functions and features
The pressure indicator model F151-A is a microprocessor driven instrument designed to display the
pressure measured by two separate sensors.
This product has been designed with a focus on:
ultra-low power consumption to allow long-life battery powered applications (option PB),
intrinsic safety for use in hazardous applications (option XI),
several mounting possibilities with ABS or aluminum enclosures for harsh industrial
surroundings,
Sensor input
This manual describes the unit with two analog (0)4-20mA inputs for the sensor "-A version". Other
versions are available to process 0-10V sensor signals.
Fig. 1: Typical application for the F151-A.
Configuration of the unit
The F151-A was designed to be implemented in many types of applications. For that reason, a
SETUP-level is available to configure your F151-A according to your specific requirements.
SETUP includes several important features, such as Span, measurement units, signal selection etc.
All setting as are stored in EEPROM memory and will not get lost in case of power break-down or
empty battery.
To extend the battery-life time (option), please make use of the power-management functions as
described in chapter 3.2.3.
Overview typical application F151
RS232/RS485
Modbus
(option)
A: (0)4-20mA
U: 0-10V DC

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Display information
The unit has a large transflective LCD with all kinds of symbols and digits to display measuring units,
status information, trend-indication and key-word messages.
The measured pressure of each line can be displayed one by one or simultaneously.
Options
Following options are available: full Modbus communication RS232/485 (also battery powered),
intrinsic safety, power- and sensor-supply options, panel-mount, wall-mount and weather-proof
enclosures, flame proof enclosure.

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2. OPERATIONAL
2.1. GENERAL
The F151-A may only be operated by personnel who are authorized and trained by the
operator of the facility. All instructions in this manual are to be observed.
Take careful notice of the " Safety rules, instructions and precautionary measures " in
the front of this manual.
This chapter describes the daily use of the F151-A. This instruction is meant for users / operators.
2.2. CONTROL PANEL
The following keys are available:
Fig. 2: Control Panel.
Functions of the keys
This key is used to program and save new values or settings.
It is also used to get access to SETUP-level; please read chapter 3.
This key is used to SELECT manually one of the actual pressure value’s.
The arrow-key is used to configure the unit; please read chapter 3.
T his key is used to select manually one of the actual pressure value’s.
The arrow-key is used configure the unit; please read chapter 3.

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2.3. OPERATOR INFORMATION AND FUNCTIONS
In general, the pressure indicator will always act at Operator level. The information displayed
depends on the SETUP-settings. Although the refresh-rate of the display might be slow (due to
power-management functions), the sensor signals will be processed at all times. After pressing a
key, the display will be updated very fast during 30 seconds after which it will slow-down again.
Fig. 3: Example display when the information is selected manually.
Fig. 4: Example display information when sensor A and B are displayed simultaneously.
For the Operator, the following functions are available:
Display pressure
The actual pressure is displayed with the 17mm digits at the upper line. When "-------" is
shown, the pressure is too high to be displayed. The arrows indicate the increase /
decrease of the pressure.
Depending on the settings, both pressures can be displayed simultaneously where the input
number is displayed as "A" or "b". When they are not displayed at the same time, then the
information can be selected manually or it will be displayed automatically with an interval time
of 6 seconds.
Low-battery alarm
When the battery voltage drops, it must be replaced. At first "low-battery" will flash, but as
soon as it is displayed continuously, the battery MUST be replaced shortly after!
Only official batteries may be used, or else the guarantee will be terminated. The remaining
lifetime after the first moment of indication is generally several days up to some weeks.
Fig. 5: Example of low-battery alarm.
Alarm 01-03
When "alarm" is displayed, please consult Appendix B: problem solving.

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3. CONFIGURATION
3.1. INTRODUCTION
This and the following chapters are exclusively meant for electricians and non-operators. In these,
an extensive description of all software settings and hardware connections are provided.
Mounting, electrical installation, start-up and maintenance of the instrument may only
be carried out by trained personnel authorized by the operator of the facility. Personnel
must read and understand this Operating Manual before carrying out its instructions.
The F151-A may only be operated by personnel who are authorized and trained by the
operator of the facility. All instructions in this manual are to be observed.
Ensure that the measuring system is correctly wired up according to the wiring
diagrams. The housing may only be opened by trained personnel.
Take careful notice of the " Safety rules, instructions and precautionary measures " in
the front of this manual.
3.2. PROGRAMMING SETUP-LEVEL
3.2.1. GENERAL
Configuration of the F151-A is done at SETUP-level. SETUP-level is reached by pressing the
PROG/ENTER key for 7 seconds; at which time, both arrows will be displayed. In order to return
to the operator level, PROG will have to be pressed for three seconds. Alternatively, if no keys are
pressed for 2 minutes, the unit will exit SETUP automatically.
SETUP can be reached at all times while the F151-A remains fully operational.
Note: A password may be required to enter SETUP. Without this password access to SETUP is
denied.
To enter SETUP-level:

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Matrix structure SETUP-level:
SCROLLING THROUGH SETUP-LEVEL
Selection function-group and function:
SETUP is divided into several function groups and functions.
Each function has a unique number, which is displayed below the word "SETUP" at the bottom of
the display. The number is a combination of two figures. The first figure indicates the function-group
and the second figure the function. Additionally, each function is expressed with a keyword.
After selecting a sub-function, the next main function is selected after scrolling through all "active"
sub-functions (e.g. 1, 11, 12, 13, 14, 1, 2, 3, 31 etc.).

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To change or a select a value or value:
To change a value, use to select the digits and to increase that value.
To select a setting, both and can be used.
When the new value is not valid, the increase signor decrease-signwill be displayed while you
are programming.
When data is altered but ENTER is not pressed, then the alteration can still be cancelled by waiting
for 20 seconds or by pressing ENTER for three seconds: the PROG-procedure will be left
automatically and the former value reinstated.
Note: alterations will only be set after ENTER has been pressed!
To return to OPERATOR-level:
In order to return to the operator level, PROG will have to be pressed for three seconds. Also, when
no keys are pressed for 2 minutes, SETUP will be left automatically.

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3.2.2. OVERVIEW FUNCTIONS SETUP LEVEL
SETUP FUNCTIONS AND VARIABLES
1 PRESSURE A
11 UNIT mbar - bar - psi - no unit
12 DECIMALS 0 - 1 - 2 - 3 (Ref: displayed value)
13 SPAN 0.000001 - 999,999 units
14 DECIMALS SPAN 0 - 6
15 OFFSET -999,999 - +999,999 units
2 PRESSURE B
21 UNIT mbar - bar - psi - no unit
22 DECIMALS 0 - 1 - 2 - 3 (Ref: displayed value)
23 SPAN 0.000001 - 999,999 units
24 DECIMALS SPAN 0 - 6
25 OFFSET -999,999 - +999,999 units
3 DISPLAY
31 DISPLAY toggle - A and B - hand
4 POWER MANAGEMENT
41 LCD UPDATE fast - 1 sec - 3 sec - 15 sec - 30 sec - off
42 BATTERY MODE operational - shelf
5 SENSOR A
51 FORMULA interpolation, square root
52 FILTER 00 - 99
53 CUT-OFF 0.0 - 99.9%
54 CALIBRATE LOW (0)4mA
55 CALIBRATE HIGH 20mA
6 SENSOR B
61 FORMULA interpolation, square root
62 FILTER 00 - 99
63 CUT-OFF 0.0 - 99.9%
64 CALIBRATE LOW (0)4mA
65 CALIBRATE HIGH 20mA
7 COMMUNICATION
71 SPEED / BAUDRATE 1200 - 2400 - 4800 - 9600
72 ADDRESS 1 - 255
73 MODE ASCII - RTU - off
8 OTHERS
81 TYPE / MODEL
82 SOFTWARE VERSION
83 SERIAL NO.
84 PASSWORD 0000 - 9999
85 TAGNUMBER 0000000 - 9999999

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3.2.3. EXPLANATION SETUP-FUNCTIONS
1 - PRESSURE - A
MEASUREMENT UNIT
11 SETUP - 11 determines the measurement unit for pressure measured
with sensor A (completely independent of sensor B).
The following units can be selected:
mbar - bar - psi - no unit
Alteration of the measurement unit will have consequences for operator
and SETUP-level values.
Please note that the Span has to be adapted as well; the calculation is not
done automatically.
DECIMALS
12 This setting determines for pressure the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 2222.22 - 3333.333
SPAN
13 With the span, the sensor signal is converted to a pressure.
The span for pressure is determined on the basis of the selected
measurement unit at 20mA.
Enter the span in whole numbers (decimals are set with SETUP 14).
The more accurate the span, the more accurate the functioning of the
system will be.
Example 1 Calculating the span for level
Let us assume that the sensor generates 20mA at a
pressure of 18.95 Bar and the selected unit is "mbar". The
span is 18,950 mbar, Enter for SETUP - 13: "18950" and
for SETUP - 14 - decimals span "0".
DECIMALS SPAN
14 This setting determines the number of decimals for Span
(SETUP 13). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this SETUP - influences the accuracy of the Span
indirectly.
This setting has NO influence on the displayed number of digits for
"pressure" (SETUP 12)!
OFF SET
15 Enter here the "not measured" pressure, in case a pressure transducer is
not placed in the bottom of a container but somewhere halfway for
example.
A negative offset can be entered by pressing the middle and right button
simultaneously.

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2 - PRESSURE - B
MEASUREMENT UNIT
21 SETUP - 21 determines the measurement unit for pressure measured
with sensor B (completely independent of sensor A).
The following units can be selected:
mbar - bar - psi - no unit
Alteration of the measurement unit will have consequences for operator
and SETUP-level values.
Please note that the Span has to be adapted as well; the calculation is not
done automatically.
DECIMALS
22 This setting determines for pressure the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 2222.22 - 3333.333
SPAN
23 With the span, the sensor signal is converted to a pressure.
The span for pressure is determined on the basis of the selected
measurement unit at 20mA.
Enter the span in whole numbers (decimals are set with SETUP 24).
The more accurate the span, the more accurate the functioning of the
system will be.
Example 1 Calculating the span for level
Let us assume that the sensor generates 20mA at a
pressure of 18.95 Bar and the selected unit is "mbar". The
span is 18,950 mbar, Enter for SETUP - 23: "18950" and
for SETUP - 24 - decimals span "0".
DECIMALS SPAN
24 This setting determines the number of decimals for Span
(SETUP 23). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this SETUP - influences the accuracy of the Span
indirectly.
This setting has NO influence on the displayed number of digits for
"pressure" (SETUP 22)!
OFF SET
25 Enter here the "not measured" pressure, in case a pressure transducer is
not placed in the bottom of a container but somewhere halfway for
example.
Also, a negative offset can be entered: do press the middle and left button
simultaneously.
3 - DISPLAY
DISPLAY
31 The large 17mm digits and the 8mm digits can be set in several ways to
display the pressure and measuring units of both sensors.
Following can be selected:
•Toggle: the pressure, measuring unit and sensor number (A or B) of
each sensor will be displayed during 6 seconds followed with the
information of the other pressure sensor.
•Hand: as toggle but the selection must be made by pressing the
SELECT-button (manual selection by the operator).
•A and B: Pressure A is displayed with 17mm digits simultaneously
with pressure B with 8mm mm digits. No measuring units are
displayed; only the sensor number (A and B). All information of each
sensor can be selected by hand.

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4 - POWER MANAGEMENT
When used with the internal battery option, the user may hold the concern of reliable measurement
over a long period of time. The F151-A has several smart power management functions to extend
the battery life time significantly. Two of these functions can be set:
LCD NEW
41 The calculation of the display-information influences the power
consumption significantly. When the application does not require a fast
display update, it is strongly advised to select a slow refresh-rate.
Please understand that NO information will be lost.
The following can be selected:
Fast - 1 sec - 3 sec - 15 sec - 30 sec - off.
Example 3: Battery life-time
battery life-time with FAST update: about 2 years.
battery life-time with 1 sec update: about 5 years.
Note: after a button has been pressed by the operator - the display
refresh-rate will always be FAST during 30 seconds. When "OFF" is
selected, the display will be switched-off after 30 seconds and will be
switched-on as soon as a button has been pressed.
BATTERY-MODE
42 The unit has two modes: operational or shelf.
After "shelf" has been selected, the unit can be stored for several years; it
will process the input signal, the display is switched-off but all settings are
stored. In this mode, power consumption is extremely low.
To wake-up the unit again; press the SELECT-key twice.
5 - SENSOR - A
SIGNAL
51 The F151-A can process the (0)4-20mA signal of sensor A in two ways:
Interpolation: the signal is processed linear
R = S x I
Square root: for differential pressure
R = S √I
where:
R =Rate: the calculated pressure
S = Span: the maximum pressure at 20mA. The span is
programmed with setting 13 for pressure
I = Input: the scaled analog value; in these formulas value 0 (zero)
for (0)4mA and value 1 (one)
for 20mA.
Continued next page >>>

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5 - SENSOR - A (CONTINUED)
FILTER
52 The analog output signal of a sensor does mirror the actual pressure.
This signal is measured several times a second by the F151-A. The value
measured is a "snap-shot" of the real pressure as it will be fluctuating.
With the help of this digital filter a stable and accurate reading can be
obtained while the filter level can be set to a desired value.
The filter principal is based on three input values: the filter level (01-99),
the last measured analog value and the last average value. The higher
the filter level, the longer the response time on a value change will be.
Below, several filter levels with there response times are indicated:
FILTER VALUE RESPONSE TIME ON STEP CHANGE OF ANALOG VALUE.
TIME IN SECONDS
50%INFLUENCE 75% INFLUENCE 90%INFLUENCE 99%INFLUENCE
01 filter disabled filter disabled filter disabled filter disabled
02 0.3 seconds 0.5 seconds 1.0 seconds 1.8 seconds
03 0.5 seconds 1.0 seconds 1.5 seconds 3 seconds
05 1.0 seconds 1.8 seconds 2.8 seconds 5.3 seconds
10 1.8 seconds 3.5 seconds 5.6 seconds 11 seconds
20 3.5 seconds 7.0 seconds 11 seconds 23 seconds
30 5.3 seconds 10 seconds 17 seconds 34 seconds
50 8.8 seconds 17 seconds 29 seconds 57 seconds
75 13 seconds 26 seconds 43 seconds 86 seconds
99 17 seconds 34 seconds 57 seconds 114 seconds
CUT-OFF
53 To ignore e.g. vibration, a low-pressure cut-off can be set as percentage
over the full range of 16mA (or 20mA / 10V). When the analog value is
less then required with this setting, the signal will be ignored.
The cut-off value can be programmed is the range 0.0 - 99.9%.
Examples:
FUNCTION
(setup 51) SPAN (setup 13) REQUIRED CUT-OFF CUT-OFF (setup 53) REQUIRED OUTPUT
interpolation 450 PSI 25 PSI 25/450 x 100%=5.5% 16mA x 5.5% + 4mA = 4.88mA
square root 450 PSI 25 PSI (25/450)2 x 100%=0.3% 16mA x 0.3% + 4mA = 4.05mA
TUNE MIN / 4MA
54 With this setting it is possible to calibrate the input value for (0)4mA as the
signal from the sensor might not be exact 4.0 mA (or 0.0 mA) at minimum
pressure.
This function will measure the real output value at minimum pressure.
Warning: be very sure that the offered signal is correct
before the calibration is executed as this function has major
influences on the accuracy of the system!
After pressing PROG, three settings can be selected:
CALIBRATE: with this setting, the input will be calibrated with the
actual "(0)4mA" value. After pressing enter, CAL SET will be
displayed as soon as the calibration is completed. From that moment,
the analog value must be more than the calibrated value before the
signal will be processed.
DEFAULT: with this setting, the manufactures value is re-installed.
CAL SET: to select the last calibrated value.
Continued next page >>>

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5 - SENSOR - A (CONTINUED)
TUNE MAX / 20MA
55 With this setting it is possible to calibrate the input value for 20mA as the
signal from the sensor might not be exact 20.0 mA at maximum pressure.
This function will measure the real output value at maximum pressure.
Warning: be very sure that the offered signal is correct
before the calibration is executed as this function has major
influences on the accuracy of the system!
After pressing PROG, three settings can be selected:
CALIBRATE: with this setting, the input will be calibrated with the
actual "20mA" value. After pressing enter, CAL SET will be displayed
as soon as the calibration is completed. From that moment, the
analog value must be less than the calibrated value for a reliable
measurement.
DEFAULT: with this setting, the manufactures value is re-installed.
CAL SET: to select the last calibrated value.
6 - SENSOR - B
SIGNAL
61 The F151-A can process the (0)4-20mA signal of sensor B in two ways:
Interpolation: the signal is processed linear
R = S x I
Square root: for differential pressure
R = S √I
where:
R =Rate: the calculated pressure
S = Span: the maximum pressure at 20mA. The span is
programmed with setting 13 for pressure
I = Input: the scaled analog value; in these formulas value 0 (zero)
for (0)4mA and value 1 (one)
for 20mA.
Continued next page >>>

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6 - SENSOR - B (CONTINUED)
FILTER
62 The analog output signal of a sensor does mirror the actual pressure.
This signal is measured several times a second by the F151-A. The value
measured is a "snap-shot" of the real pressure as it will be fluctuating.
With the help of this digital filter a stable and accurate reading can be
obtained while the filter level can be set to a desired value.
The filter principal is based on three input values: the filter level (01-99),
the last measured analog value and the last average value. The higher
the filter level, the longer the response time on a value change will be.
Below, several filter levels with there response times are indicated:
FILTER VALUE RESPONSE TIME ON STEP CHANGE OF ANALOG VALUE.
TIME IN SECONDS
50%INFLUENCE 75% INFLUENCE 90%INFLUENCE 99%INFLUENCE
01 filter disabled filter disabled filter disabled filter disabled
02 0.3 seconds 0.5 seconds 1.0 seconds 1.8 seconds
03 0.5 seconds 1.0 seconds 1.5 seconds 3 seconds
05 1.0 seconds 1.8 seconds 2.8 seconds 5.3 seconds
10 1.8 seconds 3.5 seconds 5.6 seconds 11 seconds
20 3.5 seconds 7.0 seconds 11 seconds 23 seconds
30 5.3 seconds 10 seconds 17 seconds 34 seconds
50 8.8 seconds 17 seconds 29 seconds 57 seconds
75 13 seconds 26 seconds 43 seconds 86 seconds
99 17 seconds 34 seconds 57 seconds 114 seconds
CUT-OFF
63 To ignore e.g. vibration, a low-pressure cut-off can be set as percentage
over the full range of 16mA (or 20mA / 10V). When the analog value is
less then required with this setting, the signal will be ignored.
The cut-off value can be programmed is the range 0.0 - 99.9%.
Examples:
FUNCTION
(setup 61) SPAN (setup 23) REQUIRED CUT-OFF CUT-OFF (setup 63) REQUIRED OUTPUT
interpolation 450 PSI 25 PSI 25/450 x 100%=5.5% 16mA x 5.5% + 4mA = 4.88mA
square root 450 PSI 25 PSI (25/450)2 x 100%=0.3% 16mA x 0.3% + 4mA = 4.05mA
TUNE MIN / 4MA
64 With this setting it is possible to calibrate the input value for (0)4mA as the
signal from the sensor might not be exact 4.0 mA (or 0.0 mA) at minimum
pressure.
This function will measure the real output value at minimum pressure.
Warning: be very sure that the offered signal is correct
before the calibration is executed as this function has major
influences on the accuracy of the system!
After pressing PROG, three settings can be selected:
CALIBRATE: with this setting, the input will be calibrated with the
actual "(0)4mA" value. After pressing enter, CAL SET will be
displayed as soon as the calibration is completed. From that moment,
the analog value must be more than the calibrated value before the
signal will be processed.
DEFAULT: with this setting, the manufactures value is re-installed.
CAL SET: to select the last calibrated value.
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6 - SENSOR - B (CONTINUED)
TUNE MAX / 20MA
65 With this setting it is possible to calibrate the input value for 20mA as the
signal from the sensor might not be exact 20.0 mA at maximum pressure.
This function will measure the real output value at maximum pressure.
Warning: be very sure that the offered signal is correct
before the calibration is executed as this function has major
influences on the accuracy of the system!
After pressing PROG, three settings can be selected:
CALIBRATE: with this setting, the input will be calibrated with the
actual "20mA" value. After pressing enter, CAL SET will be displayed
as soon as the calibration is completed. From that moment, the
analog value must be less than the calibrated value for a reliable
measurement.
DEFAULT: with this setting, the manufactures value is re-installed.
CAL SET: to select the last calibrated value.
7 - COMMUNICATION (OPTIONAL)
Functions as described below deal with hardware that are not part of the standard delivery.
Programming of these functions does not have any effect if this hardware has not been installed.
Consult Appendix C and the Modbus communication protocol description for a detailed explanation.
BAUDRATE
71 For external control, following communication speeds can be selected:
1200 - 2400 - 4800 - 9600 baud
BUS ADDRESS
72 For communication purposes, a unique identity can be attributed to every
F151-A. This address can vary from 1-255.
MODE
73 The communication is executed according Modbus protocol ASCII or RTU
mode. With OFF, the communication is disabled.
8 - OTHERS
TYPE OF MODEL
81 For support and maintenance it is important to have information about the
characteristics of the F151-A.
Your supplier will ask for this information in the case of a serious
breakdown or to assess the suitability of your model for upgrade
considerations.
VERSION SOFTWARE
82 For support and maintenance it is important to have information about the
characteristics of the F151-A.
Your supplier will ask for this information in the case of a serious
breakdown or to assess the suitability of your model for upgrade
considerations.
SERIAL NUMBER
83 For support and maintenance it is important to have information about the
characteristics of the F151-A.
Your supplier will ask for this information in the case of a serious
breakdown or to assess the suitability of your model for upgrade
considerations.
PASSWORD
84 All SETUP-values can be password protected.
This protection is disabled with value 0000 (zero).
Up to and including 4 digits can be programmed, for example 1234.
TAGNUMBER
85 For identification of the unit and communication purposes, a unique
tagnumber of maximum 7 digits can be entered.

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4. INSTALLATION
4.1. GENERAL DIRECTIONS
Mounting, electrical installation, start-up and maintenance of this instrument may only be carried
out by trained personnel authorized by the operator of the facility. Personnel must read and
understand this Operating Manual before carrying out its instructions.
The F151-A may only be operated by personnel who are authorized and trained by the operator
of the facility. All instructions in this manual are to be observed.
Ensure that the measuring system is correctly wired up according to the wiring diagrams.
Protection against accidental contact is no longer assured when the housing cover is removed
or the panel cabinet has been opened (danger from electrical shock). The housing may only be
opened by trained personnel.
Take careful notice of the " Safety rules, instructions and precautionary measures " at the front
of this manual.
4.2. INSTALLATION / SURROUNDING CONDITIONS
Take the relevant IP classification of the casing into account (see manufactures plate). Even an IP67
(NEMA 4X) casing should NEVER be exposed to strongly varying (weather) conditions.
When panel-mounted, the unit is IP65 (NEMA 4X)!
When used in very cold surroundings or varying climatic conditions, take the necessary precautions
against moisture by placing a dry sachet of silica gel, for example, inside the instrument case.
Mount the F151-A on a solid structure to avoid vibrations.