Fluidwell F126-P-EG-IA-TP User manual

F126-P-EG-IA-TP
FLOW COMPUTER FOR CORRECTED GAS VOLUME
Signal input flowmeter - type P: pulse, Namur and coil
Signal input pressure - type IA: (0)4-20mA
Signal input temperature - type TP: PT100 2- or 3 wire
Signal output: 0/4-20mA / 0-10V ref. corrected flowrate
Options: Intrinsically Safe, Modbus communication
F-Series - Field mounted indicators for safe and hazardous areas. More info: www.fluidwell.com/fseries

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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 F126-P-EG 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 F126-P-EG 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 F126-P-EG 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 F126-P-EG 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 F126-P-EG 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 F126-P-EG or connected instruments.
A "caution" indicates actions or procedures which, if not performed correctly, may lead to
personal injury or incorrect functioning of the F126-P-EG 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 : 02.05.xx
Manual : HF126PEN_EG_IA_TP_v0501_04
© Copyright 2003-2011 : 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
Disposal .................................................................................................................................................... 2
Safety rules and precautionary measures ....................................................................................................... 2
About the operation manual ............................................................................................................................ 3
1. Introduction ................................................................................................................................. 5
1.1. System description of the F126-P-EG ................................................................................... 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 - Total........................................................................................................................... 13
2 - Flowrate ..................................................................................................................... 14
3 - Power management .................................................................................................. 15
4 - Flowmeter .................................................................................................................. 15
5 - Temperature .............................................................................................................. 16
6 - Pressure .................................................................................................................... 17
7 - Formula...................................................................................................................... 18
8 - Analog output............................................................................................................. 19
9 - Communication.......................................................................................................... 20
A - Others........................................................................................................................ 20
4. Installation ................................................................................................................................. 21
4.1. General directions................................................................................................................ 21
4.2. Installation / surrounding conditions .................................................................................... 21
4.3. Dimensions- Enclosure ........................................................................................................ 22
4.4. Installing the hardware......................................................................................................... 24
4.4.1. Introduction .......................................................................................................................... 24
4.4.2. Voltage selection sensor supply .......................................................................................... 25
4.4.3. Terminal connectors ............................................................................................................ 26
5. Intrinsically safe applications..................................................................................................... 33
5.1. General information and instructions ................................................................................... 33
5.2. Terminal connectors Intrinsically Safe applications ............................................................. 34
5.3 Configuration Examples....................................................................................................... 36
5.4 Battery replacement instructions.......................................................................................... 38
6.1. General directions................................................................................................................ 39
6.2. Repair................................................................................................................................... 39
Appendix A: Technical specification .............................................................................................................. 40
Appendix B: Problem solving......................................................................................................................... 44
Appendix C: Communication variables.......................................................................................................... 45
Index of this manual....................................................................................................................................... 49
List of figures in this manual .......................................................................................................................... 49
Notes .................................................................................................................................................. 50

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1. INTRODUCTION
1.1. SYSTEM DESCRIPTION OF THE F126-P-EG
Functions and features
The flowrate / totalizer model F126-P-EG-IA-TP is a microprocessor driven instrument designed for
the calculation of corrected gas volume using flow equations. The unit displays compensated
flowrate / total, line temperature and pressure.
This product has been designed with a focus on:
ultra-low power consumption to allow long-life battery powered applications (type PB and PC),
intrinsic safety for use in hazardous applications (type XI),
several mounting possibilities with aluminum or GRP enclosures for harsh industrial
surroundings,
ability to process all types of flowmeter signals,
transmitting possibilities with analog / pulse / alarm and communication (option) outputs.
Flowmeter and sensor inputs
For gas applications, one flowmeter, one temperature and one pressure sensor have to be
connected to the F126-P-EG-TP-IA. This manual describes the unit with a pulse signal input for the
flowmeter "-P version". Other input versions are available to process (0)4-20mA or 0-10V flowmeter
signals. The pressure sensor required is a (0)4-20mA signal; alternatively, a 0-10V sensor input can
be supplied. The temperature sensor requires a 2-wire or 3-wire PT100 element; alternatively, a
(0)4-20mA or 0-10V sensor input can be supplied.
To power the sensors, several options are available.
Standard output
Configurable linear (0)4-20mA or 0-10V analog output with 10-bits resolution mirroring the actual
flowrate at standard conditions. Flowrate levels as well as the minimum and maximum signal
output can be tuned.
Fig. 1: Typical application for the F126-P-EG.

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Configuration of the unit
The F126-P-EG was designed to be implemented in many types of applications. For that reason, a
SETUP-level is available to configure your F126-P-EG 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.
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.
Flowrate and totals can be displayed either with the small 8mm digits or with the 17mm digits.
A backup of the total and accumulated total in EEPROM memory is made every minute.
Options
Following options are available: isolated or active 4-20mA / 0-10V / 0-20mA analog output, 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 F126-P-EG 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 F126-P-EG. 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 accumulated total.
The arrow-key is used to increase a value after PROG has been pressed
or to configure the unit; please read chapter 3.
Press this key twice to CLEAR the value for total.
The arrow-key is used to select a digit after PROG has been pressed or to
configure the unit; please read chapter 3.

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2.3. OPERATOR INFORMATION AND FUNCTIONS
In general, the F126-P-EG will always act function at Operator level. The information displayed is
dependant up on the SETUP-settings. The signal generated by the connected flowmeter are
measured by the F126-P-EG in the background, whichever screen refresh rate setting is chosen.
After pressing a key, the display will be updated very quickly during a 30 second period, after which
it will slow-down again.
Fig. 3: Example of display information during process.
For the Operator, the following functions are available:
Display calculated flowrate / total or calculated flowrate
This is the main display information of the F126-P-EG. After selecting any other information, it
will always return to this main display automatically.
Total is displayed at the upper-line of the display and flowrate and the bottom line.
Possibly, only flowrate will be displayed with the large 17mm digits; do press the SELECT-key
to read the total. When "-------" is shown, then the flowrate value is too high to be displayed.
The arrows indicate the increase / decrease of the flowrate trend.
Clear total
The value for total can be re-initialized. To do so, press CLEAR twice. After pressing CLEAR
once, the flashing text "PUSH CLEAR" is displayed. To avoid re-initialization in this stage,
press an other key as CLEAR or wait for 20 seconds. Re-initialization of total DOES NOT
influence the accumulated total.
Display calculated accumulated total
When the SELECT-key is pressed, total and accumulated total are displayed. The
accumulated total cannot be re-initialized. The value will count up to 99,999,999,999. The unit
and number of decimals are displayed according to the configuration settings for total.
Display line pressure
After pressing SELECT, the actual measured pressure is displayed.
Display line temperature
After pressing SELECT, the actual measured temperature is displayed.
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 original batteries supplied by the manufacturer may be used, else the guarantee and
liability will be terminated. The remaining lifetime after the first moment of indication is
generally several days up to some weeks.
Fig. 4: Example of low-battery alarm.
Alarm 01-03
When "alarm" is displayed, please consult Appendix B: problem solving.
RUN
LOW BATTERY
RUN

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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 F126-P-EG 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 F126-P-EG 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 F126-P-EG 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 TOTAL
11 UNIT L - m3 - kg - lb - GAL - USGAL - bbl - no unit
12 DECIMALS 0 - 1 - 2 - 3 (Ref: displayed value)
13 K-FACTOR: 0.000010 - 9,999,999
14 DECIMALS K-FACTOR 0 - 6
2 FLOWRATE
21 UNIT mL - L - m3 - mg - g - kg - ton - GAL - bbl - lb - cf - REV -
no unit - scf - Nm3 - NL - P
22 TIME UNIT sec - min - hour - day
23 DECIMALS 0 - 1 - 2 - 3 (Ref: displayed value)
24 K-FACTOR 0.000010 - 9,999,999
25 DECIMALS K-FACTOR 0 - 6
26 FILTER 1 - 99
27 PERIOD 0.1 - 99.9 seconds
3 POWER MANAGEMENT
31 LCD UPDATE fast - 1 sec - 3 sec - 15 sec - 30 sec - off
32 BATTERY MODE operational - shelf
4 FLOWMETER
41 SIGNAL npn - npn_lp - reed - reed_lp - pnp - pnp_lp - namur -
coil_hi - coil_lo - act_8.1 - act_12 - act_24
5 TEMPERATURE
51 NR. OF WIRES 2 - 3
52 FILTER 1 - 99
53 DISPLAY °C - °F - K
6 PRESSURE
61 UNIT mbar - bar- psi - no unit
62 SPAN 0.000001 - 9,999,999 unit
63 DECIMALS SPAN 0 - 6
64 OFF-SET 0.000 - 9,999.999 unit
65 FILTER 1 - 99
66 CALIBRATE LOW default - calibrate - calibrate set
67 CALIBRATE HIGH default - calibrate - calibrate set
7 FORMULA
71 EQUATIONS TYPE EG - (fixed)
72 NORMAL TEMPERAT. 0.000 - 9,999.999
73 NORMAL PRESSURE 0.000 - 9,999.999
74 NORMAL COMPRESS. 0 - 9,999,999
75 COMPRESSIBILITY 0 - 9,999,999
8 ANALOG
81 OUTPUT disable - enable
82 4mA / 0V 0000.000 - 9,999,999
83 20mA / 10V 0000.000 - 9,999,999
84 CUT-OFF 0.0 - 9.9%
85 TUNE MIN - 4mA / 0V 0 - 9,999
86 TUNE MAX- 20mA / 10V 0 - 9,999
87 FILTER 00 - 99
9 COMMUNICATION
91 SPEED / BAUDRATE 1200 - 2400 - 4800 - 9600
92 ADDRESS 1 - 255
93 MODE rtu - off
A OTHERS
A1 TYPE / MODEL
A2 SOFTWARE VERSION
A3 SERIAL NO.
A4 PASSWORD 0000 - 9999
A5 TAGNUMBER 0000000 - 9999999

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3.2.3. EXPLANATION SETUP-FUNCTIONS
1 - TOTAL
MEASUREMENT UNIT
11 SETUP - 11 determines the measurement unit for total and accumulated
total. The following units can be selected:
L - m3 - kg - lb. - GAL - USGAL - bbl - _ (no unit).
Alteration of the measurement unit will have consequences for operator
and SETUP-level values.
Please note that the K-factor has to be adapted as well; the calculation is
not done automatically.
DECIMALS
12 The decimal point determines for total and accumulated total the number
of digits following the decimal point.
The following can be selected:
0000000 - 111111.1 - 22222.22 - 3333.333
K-FACTOR
13 With the K-factor, the flowmeter pulse signals are converted to a quantity.
The K-factor is based on the number of pulses generated by the
flowmeter per selected measurement unit (SETUP 11), for example per
cubic meter. The more accurate the K-factor, the more accurate the
functioning of the system will be.
Example 1: Calculating the K-factor.
Let us assume that the flowmeter generates 2.4813 pulses per
liter and the selected unit is "cubic meters / m3". A cubic meter
consists of 1000 parts of one liter which implies 2,481.3 pulses
per m3. So, the K-factor is 2,481.3. Enter for SETUP - 13:
"2481300" and for SETUP - 14 - decimals K-factor "3".
Example 2: Calculating the K-factor.
Let us assume that the flowmeter generates 6.5231 pulses per
gallon and the selected measurement unit is gallons. So, the K-
Factor is 6.5231. Enter for SETUP - 13: "6523100" and for
SETUP - 14 decimals K-factor "6".
DECIMALS K-FACTOR
14 This setting determines the number of decimals for the K-factor
(SETUP 13). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this function influences the accuracy of the K-factor
indirectly.
This setting has NO influence on the displayed number of digits for total
(SETUP 12)!

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2 - FLOWRATE
The settings for total and flowrate are entirely separate. In this way, different units of measurement
can be used for each e.g. cubic meters for total and liters for flowrate.
The display update time for flowrate is one second or more.
Note: these settings also influence the analog output.
MEASUREMENT UNIT
21 SETUP - 21 determines the measurement unit for flowrate.
The following units can be selected:
mL - L - m3 - mg - g - kg - ton - GAL - bbl - lb - cf - REV - no unit -
scf - Nm3 - NL - P.
Alteration of the measurement unit will have consequences for operator
and SETUP-level values.
Please note that the K-factor has to be adapted as well; the calculation is
not done automatically.
TIME UNIT
22 The flowrate can be calculated per second (SEC), minute (MIN), hour
(HR) or day (DAY).
DECIMALS
23 This setting determines for flowrate the number of digits following the
decimal point. The following can be selected:
00000 - 1111.1 - 2222.22 - 3333.333
K-FACTOR
24 With the K-factor, the flowmeter pulse signals are converted to a flowrate.
The K-factor is based on the number of pulses generated by the
flowmeter per selected measurement unit (SETUP 21), for example per
liter. The more accurate the K-factor, the more accurate the functioning of
the system will be. For examples read SETUP 13.
DECIMALS K-FACTOR
25 This setting determines the number of decimals for the K-factor
(SETUP 24). The following can be selected:
0 - 1 - 2 - 3 - 4 - 5 - 6
Please note that this SETUP - influences the accuracy of the K-factor
indirectly.
This setting has NO influence on the displayed number of digits for
"flowrate" (SETUP 23)!
FILTER
26 This function is used to stabilize the flowrate reading. With the help of this
digital filter a more stable but less actual reading can be obtained.
The filter principal is based on three input values: the filter level (01-99),
the last calculated flowrate 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
10 0.7 second 1.4 seconds 2.2 seconds 4.4 seconds
20 1.4 seconds 2.8 seconds 4.5 seconds 9.0 seconds
30 2.1 seconds 4 seconds 7 seconds 14 seconds
50 3.5 seconds 7 seconds 11 seconds 23 seconds
75 5.2 seconds 10 seconds 17 seconds 34 seconds
99 6.9 seconds 14 seconds 23 seconds 45 seconds
PERIOD
27 The flowrate is calculated by counting the number of pulses within a
certain time, for example 1 second. The longer the time the more accurate
the flowrate will be. The maximum value is 999.9 seconds.
Note: this setting does influence the update time for the analog output
directly (maximum update 10 times a second). If the output response is
too slow, decrease the number of pulses.
Note: the shorter the time, the higher the power consumption of the unit
will be (important for battery powered applications).

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3 - 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 F126-P-EG has several smart power management functions to
extend the battery life time significantly. Two of these functions can be set:
LCD NEW
31 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 input signal will be
processed normally as well as the output-signals. The following can be
selected:
Fast - 1 sec - 3 sec - 15 sec - 30 sec - off.
Example Battery life-time
battery life-time with a FAST update: about 2 years.
battery life-time with a 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
32 The unit has two modes: operational or shelf.
After "shelf" has been selected, the unit can be stored for several years; it
will not process the signal, the display is switched-off but all settings and
totals are stored. In this mode, power consumption is extremely low.
To wake-up the unit again; press the SELECT-key twice.
4 - FLOWMETER
SIGNAL
41 The F126-P-EG is able to handle several types of signals. The type of
flowmeter pickup / signal is selected with SETUP 41.
Note: The selections "active pulse" offer a detection level of 50% of the
supply voltage.
Read also par. 4.4.3. Flowmeter input terminal 09-11.
TYPE OF SIGNAL EXPLANATION RESISTANCE FREQ./MV REMARK
NPN NPN input 100K
pull-up 6 kHz. (open collector)
NPN - LP NPN input
with low pass filter 100K pull-up 2.2 kHz. (open collector) less sensitive
REED Reed-switch input 1M
pull-up 1.2 kHz.
REED - LP Reed-switch input
with low pass filter 1M pull-up 120 Hz. Less sensitive
PNP PNP input 100K
pull-down 6 kHz.
PNP - LP PNP input
with low pass filter 100K pull-down 700 Hz. Less sensitive
NAMUR Namur input 820 Ohm
pull-down 4 kHz. External power
required
COIL HI High sensitive coil input - 20mV
p.t.p. Sensitive for disturbance!
COIL LO Low sensitive coil input - 90mV
p.t.p. Normal sensitivity
ACT_8.1 Active pulse input
8.1 VDC 3K9 10KHz.
External power
required
ACT_12 Active pulse input
12 VDC 4K 10KHz.
External power
required
ACT_24 Active pulse input
24 VDC 3K 10KHz.
External power
required

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5 - TEMPERATURE
Conversion formula’s temperature units:
xK = (x-273,15)°C = (9/5x-459,67)°F
x°C = (x+273,15)K = 9/5x+32°F
x°F = 5/9(x-32)°C = 5/9(x+459,67)K
DISPLAY UNIT
51 SETUP - 51 determines the displayed unit for the Operator
The following units can be selected: °C - °F - K
NO. OF WIRES
52 Do select here the number of wires of the two PT100 elements - two or
three.
FILTER
53 The output signal of a sensor does mirror the actual temperature. This
signal is measured several times a second. The value measured is a
"snap-shot" of the real temperature 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 (10-99),
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.
FILTER VALUE RESPONSE TIME ON STEP CHANGE OF ANALOG VALUE.
TIME IN SECONDS
50%INFLUENCE 75%INFLUENCE 90% INFLUENCE 99%INFLUENCE
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

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6 - PRESSURE
MEASURING UNIT
61 SETUP - 61 determines the measurement unit for pressure.
The following units can be selected:
mbar - bar - psi - no unit
SPAN
62 With this setting, the measurement range of the (0)4-20mA pressure
sensor is determined according the selected measurement unit (setting
61). See also setting 63 - decimals span.
Example Calculating the span for pressure.
Let us assume that the sensor generates the minimum signal
(e.g.4mA) at a pressure of 2.5 bar and the maximum signal
(e.g. 20mA) is generated at 50 bar. Then the span is 47.5 bar.
Enter for SETUP - 62: "0004750" if decimals for span are two.
DECIMALS SPAN
63 According setting 62, the number of decimals for span have to be set.
OFFSET
64 Calculations are based on absolute pressures.
The flow computer must know the measured pressure at minimum signal.
(2.5 bar in above example)
•When using a gauge type pressure indicator enter an offset to
compensate environmental pressure (e.g. air pressure, 1.013 bar)
•When working with a “fixed” pressure, enter the fixed line pressure here
and make sure that the span is set to zero.
Value to be entered: 0.000 - 9,999.999 unit.
FILTER
65 The analog output signal of a sensor does mirror the actual pressure.
This signal is measured several times a second. The value measured is a
“snap-shot” of the real temperature 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.
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
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
50 8.8 seconds 17 seconds 29 seconds 57 seconds
99 17 seconds 34 seconds 57 seconds 114 seconds
CALIBRATE LOW
66 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 minimum signal.
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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CALIBRATE HIGH
67 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 signal.
This function will measure the real output value at maximum signal.
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 - FORMULA
EQUATIONS TYPE
71 This display function describes the supplied equations.
The supplied Model is the F126-P-EG.
“EG” stands for Equations Gas - flow computer for corrected gas volume.
The formula used:
Qnormal = Q * (P / Pnormal) * (Tnormal / T) * (Cnormal / C)
where
Q
normal = calculated volume at normal conditions
Q = measured volume
P = line pressure
P
normal = normal pressure
T
normal = normal temperature
T = line temperature
C
normal = normal compressibility factor
C = compressibility
NORMAL
TEMPERATURE
72
Enter here the reference temperature Tnormal in degrees Kelvin (K).
In most applications, the gas volume has to be calculated at 0°C which is
273,15 K.
NORMAL PRESSURE
73 Enter here the reference pressure Pnormal in the selected pressure unit. In
most applications, the volume has to be calculated at 1.013 Bar.
NORMAL
COMPRESSABILITY
FACTOR
74
Enter here the compressibility factor for the gas at reference conditions.
COMPRESSABILITY
FACTOR
75
Enter here the compressibility factor for the gas at operating conditions.
The C factor indicates how different a “real” gas behaves from an “ideal”
gas which exactly obeys the “general gas law” (PxV/T=constant) where
the C factor is 1.
If SETUP 74 or 75 is set to zero: the compressibility factor is disabled.

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8 - ANALOG OUTPUT
A linear analog (0)4-20mA or 0-10V signal is generated according to the flowrate with a 10 bits
resolution. The settings for flowrate (SETUP - 2) influence the analog output directly.
The relationship between rate and analog output is set with the following functions:
DISABLE / ENABLE
81 The analog output can be disabled.
In case of a passive analog output type AP, 3.5mA will be generated if a
power supply is available but the output is disabled.
MINIMUM FLOWRATE
82 Enter here the flowrate at which the output should generate the minimum
signal (0/4mA or 0V) - in most applications at flowrate "zero".
The number of decimals displayed depend upon SETUP 23.
The time and measuring units (L/min for example) are dependant upon
SETUP 21 and 22 but are not displayed.
MAXIMUM FLOWRATE
83 Enter here the flowrate at which the output should generate the maximum
signal (20mA or 10V) - in most applications at maximum flow.
The number of decimals displayed depend upon SETUP 23.
The time and measuring units (L/min for example) are dependant upon
SETUP 21 and 22 but can not be displayed.
CUT-OFF
84 To ignore leakage of the flow for example, a low flow cut-off can be set as
a percentage of the full range of 16mA, 20mA or 10V.
When the flow is less than the required rate, the current will be the
minimum signal (0/4mA or 10V).
Examples:
4MA
(SETUP 82) 20MA (SETUP 83) CUT-OFF (SETUP 84) REQUIRED RATE OUTPUT
0 L/min 100 L/min 2% (100-0)*2% = 2.0 L/min 4+(16*2%) = 4.32mA
20 L/min 800 L/min 3.5% (800-20)*3.5%= 27.3 L/min 4+(16*3.5%)=4.56mA
TUNE MIN / 4MA
85 The initial minimum analog output value is 0/4mA or 0V. However, this
value might differ slightly due to external influences such as temperature
for example. The 0/4mA or 0V value can be tuned precisely with this
setting.
Before tuning the signal, be sure that the analog signal is not
being used for any application!
After pressing PROG, the current will be about 4mA (or 0mA / 0V). The
current can be increased / decreased with the arrow-keys and is directly
active. Press ENTER to store the new value.
Remark: the analog output value can be programmed “up-side-down” if
desired, so 20mA at minimum flowrate for example!
TUNE MAX / 20MA
86 The initial maximum analog output value is 20mA (or 10V). However, this
value might differ slightly due to external influences such as temperature
for example. The 20mA value (or 10V) can be tuned precisely with this
setting.
Before tuning the signal, be sure that the analog signal is not
being used for any application!
After pressing PROG, the current will be about 20mA. The current can be
increased / decreased with the arrow-keys and is directly active. Press
ENTER to store the new value.
Remark: the analog output value can be programmed “up-side-down” if
desired, so 4mA at maximum flowrate for example!
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8 - ANALOG OUTPUT (CONTINUED)
FILTER
87 This function is used to stabilize the analog output signal.
The output value is updated every 0.1 second. With the help of this digital
filter a more stable but less precise reading can be obtained.
The filter principal is based on three input values: the filter level (01-99),
the last analog output 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 their 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 0.1 second 0.2 second 0.4 second 0.7 second
03 0.2 second 0.4 second 0.6 second 1.2 seconds
05 0.4 second 0.7 second 1.1 seconds 2.1 seconds
10 0.7 second 1.4 seconds 2.2 seconds 4.4 seconds
20 1.4 seconds 2.8 seconds 4.5 seconds 9.0 seconds
30 2.1 seconds 4 seconds 7 seconds 14 seconds
50 3.5 seconds 7 seconds 11 seconds 23 seconds
75 5.2 seconds 10 seconds 17 seconds 34 seconds
99 6.9 seconds 14 seconds 23 seconds 45 seconds
9 - COMMUNICATION
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
91 For external control, following communication speeds can be selected:
1200 - 2400 - 4800 - 9600 baud
BUS ADDRESS
92 For communication purposes, a unique identity can be attributed to every
F126-P-EG. This address can vary from 1-255.
MODE
93 The communication is executed according Modbus protocol RTU mode.
With OFF, the communication is disabled.
A - OTHERS
TYPE OF MODEL
A1 For support and maintenance it is important to have information about the
characteristics of the F126-P-EG.
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
A2 For support and maintenance it is important to have information about the
characteristics of the F126-P-EG.
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
A3 For support and maintenance it is important to have information about the
characteristics of the F126-P-EG.
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
A4 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
A5 For identification of the unit and communication purposes, a unique
tagnumber of maximum 7 digits can be entered.