NuFlo MC-II Plus Weatherproof User manual

Manual N
o
. 101235341, Rev.
E
NuFloTM
Flow Analyzers:
MC-II Plus Weatherproof
and MC-II Plus Panel Mount
User Manual

© 2005 NuFlo Technologies, Inc. All information contained in this publication is confidential and
proprietary property of NuFlo Technologies, Inc. Any reproduction or use of these instructions,
drawings, or photographs without the express written permission of an officer of NuFlo
Technologies, Inc. is forbidden.
All Rights Reserved.
Printed in the United States of America.
Manual No. 101235341, Rev. E
May 2005

MC-II Plus WP-PM Flow Analyzer
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TABLE OF CONTENTS
Introduction...........................................................................................................1
Specifications........................................................................................................2
Installation.............................................................................................................3
Operation..............................................................................................................3
Error Detection......................................................................................................4
Calibration.............................................................................................................6
Liquid Measurement Using Preprogrammed Units of Measure..................6
Gas Measurement Using Preprogrammed Units of Measure...................10
Liquid Measurement Using a Calculated Divisor and Rate Multiplier.......14
Gas Measurement Using a Calculated Divisor and Rate Multiplier..........18
Time Out Feature................................................................................................22
Presetting Volume...............................................................................................22
Setting Flow Rate Filtering..................................................................................23
Setting Input Sensitivity.......................................................................................23
Configuring Pulse Output....................................................................................24
Configuring the 4-20 mA Rate Output.................................................................26
Setting a Security Code......................................................................................28
Accessing an MC-II Plus with a Security Code...................................................28
Appendix A1 – Installation – Panel Mount MC-II Plus..................................... A1-1
General ................................................................................................ A1-1
Input / Output Features ........................................................................ A1-1
Pulse Output ............................................................................. A1-1

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External Power Supply.............................................................. A1-2
4-20 mA Rate Output................................................................. A1-2
Flow Meter Frequency Output................................................... A1-3
Remote Reset Input................................................................... A1-3
MC-II Plus DIN Panel Mount Nomenclature......................................... A1-4
MC-II Plus Double Wide Single Readout Nomenclature ...................... A1-5
MC-II Plus Double Wide Two Readout Nomenclature ......................... A1-6
MC-II Plus DIN Panel Mount Dimensional............................................ A1-7
MC-II Plus Double Wide Single Readout Dimensional......................... A1-8
MC-II Plus Double Wide Two Readout Dimensional............................ A1-9
Wiring Diagrams................................................................................. A1-10
Flow Meter Input...................................................................... A1-10
Pulse Output............................................................................ A1-11
External Power Supply............................................................ A1-12
4-20 mA Rate Output............................................................... A1-13
Flow Meter Frequency Output................................................. A1-14
Reset Input with Power Supply and Reset Switch.............................. A1-15
Reset Using MC-II Plus Battery and Reset Switch............................ A1-16
Panel Mount MC-II Plus Part Numbers .............................................. A1-17
Appendix A2 – Installation - Weatherproof MC-II Plus.................................... A2-1
General ................................................................................................ A2-1
Mounting on the Flow Meter................................................................. A2-1
Remote Mounting................................................................................. A2-1

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Input / Output Features ........................................................................ A2-2
Pulse Output ............................................................................. A2-2
External Power Supply.............................................................. A2-3
4-20 mA Rate Output................................................................. A2-3
Flow Meter Frequency Output................................................... A2-4
Remote Reset Input................................................................... A2-4
MC-II Plus Nomenclature..................................................................... A2-5
Direct Mount Mounting Dimensions ..................................................... A2-6
Remote Mount Mounting Dimensions - Vertical Pole Mount................ A2-7
Remote Mount Mounting Dimensions – Horizontal Pole Mount...........A2-8
Weatherproof MC-II Plus Part Numbers............................................... A2-9
Appendix B - Maintenance................................................................................ B-1
Battery Replacement.............................................................................. B-1
Circuit Assembly Replacement .............................................................. B-2
Spare Parts List...................................................................................... B-3
Appendix C - Configuration Menu Flowchart ....................................................C-1
Appendix D - User Interface Prompt Glossary..................................................D-1
Appendix E - Data Tables................................................................................. E-1
Table 1 - Determining Atmospheric Pressure from Elevation................. E-1
Table 2 - Table of Conversions of Temperatures................................... E-2
Table 3 - Table of Conversions of Liquid Volumes................................. E-2
Table 4- Table of Conversions of Gas Volumes..................................... E-2
Appendix F - Calibration Data Sheet..................................................................F-1

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Appendix G - Lithium Battery Information.........................................................G-1
Lithium Battery Disposal.........................................................................G-1
Transportation Information.....................................................................G-3
Appendix H – Relay Pulse Output Board Option ..............................................H-1
Installation..............................................................................................H-1
Specifications.........................................................................................H-2
Relay Pulse Output Wiring.....................................................................H-3
Relay Pulse Output Board with Optoisolator Wiring...............................H-3
Relay Pulse Output Wiring Providing External Power
to Main Board.........................................................................................H-4
Relay Installation....................................................................................H-5
Optoisolator Installation..........................................................................H-6

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Introduction
The NuFlow Measurement Systems MC-II Plus Flow Analyzer provides a continuous
display of flow rate and accumulated volume of liquids and gases. When combined
with a NuFlo turbine meter, the MC-II Plus Flow Analyzer becomes an accurate
system for the measurement and display of instantaneous flow rate and volume. In
addition, the MC-II Plus Flow Analyzer provides a scaled pulse output representing
an increment in volume for each pulse and a 4-20 mA output representing the flow
rate. The pulse out and 4-20 mA output sections can be disabled, therefore
reducing current consumption if they are not required. Additional features are a flow
meter frequency output, which may be used by remote equipment to derive flow rate
and volume, and a reset feature that allows resetting of the volume to zero from a
remote location. An optional dual contact closure relay pulse output board is also
available.
A security access code prevents unauthorized personnel from altering the calibration
or accumulated volume data in the instrument. The security code may be disabled if
this feature is not required. A preprogrammed volume may be entered into the MC-II
Plus Flow Analyzer. This is a valuable feature in instances where the MC-II Plus
Flow Analyzer is replacing other equipment and it is necessary to resume counting
volume from the previous measurements. Also, the input sensitivity of the flow
meter input may be adjusted from the front panel, eliminating the necessity to
connect test equipment for this adjustment.
The one-piece LCD simultaneously displays a seven-digit volume, a six-digit rate, as
well as a selection of commonly used rate and volume engineering units. The
seven-digit volume is displayed on the upper line of the LCD, with the volume
decimal point position selected by the operator during calibration. The six-digit rate
is displayed on the lower line of the LCD. The rate decimal point position is
determined internally by the MC-II Plus Flow Analyzer. The rate decimal point will
shift positions as the rate changes to provide maximum resolution.
Low power microprocessor technology enables the MC-II Plus Flow Analyzer to
operate approximately two years on a single lithium battery. The MC-II Plus Flow
Analyzer may be powered by an external power source using the lithium battery only
as a backup supply, therefore extending the service life of the battery. When the 4-
20 mA output feature is used, the MC-II Plus Flow Analyzer is powered by the
current loop and the lithium battery again is used only as a backup supply.
The MC-II Plus Flow Analyzer is available in panel mount and weatherproof
versions.
Three panel mount versions are available. The first version fits the ¼ DIN square
panel opening. The second version fits the standard rack opening containing
one Panel Mount MC-II Plus Flow Analyzer. The third version also fits the standard
rack opening except it contains two Panel Mount MC-II Plus Flow Analyzers.

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The Weatherproof MC-II Plus Flow Analyzer allows for use in outdoor locations,
provides excellent protection from the elements, and offers a convenient means of
mounting directly to the turbine meter. A remote mount version is also available.
Specifications
Enclosure Panel Mount
¼ Square DIN mounting MC-II Plus Flow Analyzer
or
Rack mounting front panel 8.75” H x 5.79” W
with one MC-II Plus Flow Analyzer
or
Rack mounting front panel 8.75” H x 5.79” W
with two MC-II Plus Flow Analyzers
Weatherproof
Direct mount – fiberglass, mounts directly on meter
Or
Remote mount – fiberglass, mounts on pole or bulkhead
System Power Internal Power Supply - 3.6 VDC, D-size lithium battery
External power supply (8 to 30 VDC) with internal battery backup
(reverse polarity protected)
Loop powered (4-20 mA) with internal battery backup
(reverse polarity protected)
Loop Burden: 8 VDC
Maximum voltage: 30 VDC
Load resistance: 1100 ohms @ 30 VDC
250 ohms @ 13 VDC
Operating Temperature -40°C to 75°C (-40°F to 167°F)
LCD: -30°C to 75°C (-22°F to 167°F)
LCD Display Simultaneous display of 7-digit volume, 6-digit rate, 0.3” character
height
Displays units of measurement
BBL, GAL, MCF and M³for volume
BPD, GPM, MCF/D and M³/D for flow rate
Updates every 2 seconds
Keypad 4-key membrane switch
Inputs Pulse input from flow meter, 15 to 3500 Hz, 20 mV to 10 V, input
sensitivity keypad configurable from 20 mVP-P to 120 mVP-P
Remote volume reset, optically isolated (bi-directional) input, 3–30
VDC supply range, contact duration 25 mS

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Specifications (cont’d)
Outputs Flow Meter Frequency, open collector output, 5 to 30 VDC,
Maximum current = 50 mA
Leakage current = 1 uA
On-state drop = 0.25 VDC at 50 mA, 0.1 VDC at 10 mA
Pulse output with a pulse representing volume increments from
0.001, 0.01, 0.1, 1, 10, and 100 and a pulse duration of 65, 130,
195, 260, 520, and 1040 mS, optically isolated open collector
output, 5 to 30 VDC power supply, 40 mA maximum @ 30 VDC
On-state drop = 1.8 VDC at 50 mA, 1.6 VDC at 10 mA
Dual Contact Closure Pulse Output – OPTIONAL
Reference Appendix H for complete specifications.
4-20 mA, 2 wire loop powered, representing flow rate
16 bit resolution, .05% of full scale @ 25°C
50 PPM/°C temperature drift
Updates once per second
DAC calibration via keypad
Installation
Panel Mount
The Panel Mount MC-II Plus Flow Analyzer is shipped completely assembled. After
the flow meter and magnetic pickup are installed in the flow line in accordance with
the furnished instructions, follow the installation instructions outlined in Appendix A1.
Weatherproof
The Weatherproof MC-II Plus Flow Analyzer is shipped completely assembled. After
the flow meter and magnetic pickup are installed in the flow line in accordance with
the furnished instructions, follow the installation instructions outlined in Appendix A2.
Operation
The MC-II Plus Flow Analyzer has two modes of operation, Run Mode and Calibrate
Mode.
The Run Mode is the operational function of the MC-II Plus Flow Analyzer where it is
placed in service to display rate and volume. If the MC-II Plus Flow Analyzer has
not been calibrated, it will have to be calibrated before being placed in service. The
Calibration section provides a step-by-step procedure for configuring the MC-II Plus
Flow Analyzer.
The Calibrate Mode of the MC-II Plus Flow Analyzer allows entry of calibration data
into the instrument. While in the Calibrate Mode, the upper line of the display will
have prompts consisting of abbreviated words with each letter formed with a 7-

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segment character. Due to the limitations of a 7-segment character, some of the
letters will be upper case and some will be lower case. On the lower line of the
display, the calibration data is entered. While in Calibrate Mode, each digit is
changed one at a time. The digit selected to be changed will be blinking on and off.
In the following operation and calibration examples, display prompts and keypad
names will be shown in BOLD type. The prompts will be shown in upper and lower
case letters to illustrate approximately the way that they will appear on the display.
The keypad operation is described as follows:
ACCESS: If the ACCESS key is pressed while in the Run Mode, the MC-II Plus
Flow Analyzer will be placed in the Calibrate Mode. Pressing the
ACCESS key while the MC-II Plus Flow Analyzer is in the Calibrate
Mode will return the instrument to the Run Mode. When returning to
Run Mode by pressing the ACCESS key, any data that has been input
with the ENTER key being pressed afterward will be saved to memory.
Any data that has been input without the ENTER key being pressed
afterward will not be saved, and the data entered from a previous
calibration will be retained.
STEP: The STEP key is primarily used in the Calibrate Mode. Pressing the
STEP key advances the digit to be changed to the left. If the left-most
digit is selected, pressing the STEP key again advances the digit to be
changed to the right-most digit. The STEP key is also used to toggle
settings and decimal point locations.
INCR: The INCR (increment) key is primarily used in the Calibrate Mode.
While entering numbers, the INCR key advances the value of the digit
to be changed by one from its initial value each time it is pressed. If
the INCR key is pressed when the digit is nine, the value rolls over to
zero. The INCR key is also used to toggle settings and decimal point
locations.
ENTER: The ENTER key functions only in the Calibrate Mode. Pressing the
ENTER key enters the displayed data for the current calibration
function and advances to the next calibration function.
Error Detection
The MC-II Plus Flow Analyzer will inform the operator of detected errors while in the
Run Mode. The Error message will be displayed to the operator in the form of the
word Error displayed on the rate display section (lower line of the display), every
other time that the rate is updated. There may be from one to four errors detected at
any one time.

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When the Error message is displayed, press any of the four keys on the keypad and
the first error will be shown on the upper line of the display. Press INCR or STEP to
check for additional errors. Each time INCR or STEP is pressed, the next error will
be displayed. After the last error is displayed, pressing INCR or STEP again will
display the first error again and the process will be repeated. It is recommended that
the INCR or STEP keys be pressed repeatedly to display all Error messages. The
ENTER key may be pressed to return to the Run Mode or the ACCESS key may be
pressed to enter the Calibrate Mode to correct the errors as shown below in this
section.
If more than one Error condition exists, and one of these errors is corrected, the
next Error will be displayed. If all Error conditions cease to exist, the MC-II Plus
Flow Analyzer will automatically return to the Run Mode.
There are four Error messages in the current version of firmware: rAtE, PULS.oUt,
4-20.oUt/Err Hi and 4-20.oUt/Err Lo.
The rAtE error message indicates a rate overflow. This means that the rate is in
units too large to be displayed on the LCD. Normally this error may be corrected by
entering the Calibrate Mode and changing the rate units of measure. These
changes are covered in the Calibration section of the manual.
The PULS.oUt error message indicates the pulses are accumulating faster than the
unit can output them. When pulses in excess of 255 have accumulated internally,
the MC-II Plus Flow Analyzer displays the PULS.oUt error message. The MC-II
Plus Flow Analyzer can internally accumulate 65535 pulses, so the Error message
occurs long before pulses are lost. The MC-II Plus Flow Analyzer will continue to
output the accumulated pulses until the accumulated number drops to zero, even if
the flow rate stops. This ensures that no pulses will be lost unless the accumulated
value exceeds 65535. Normally this error may be corrected by entering the
Calibrate Mode and selecting a larger pulse output scale factor and/or a shorter
pulse width duration. These changes are covered in the Configuring Pulse Output
section of the manual.
The 4-20.oUt/Err Hi error message indicates the flow rate has exceeded the full-
scale calibrated flow rate setting to the point that the current output has exceeded 22
mA. The Error message appears on the lower line of the display only during the
time that the condition exists. When any key is pressed during the error condition,
the 4-20.oUt message appears on the upper line of the display and the Err Hi
message appears on the lower line of the display. This error may be caused by
excessive flow rate or the full scale flow rate calibration point being set too low for
normal operating conditions. Changing the full-scale flow rate calibration point is
covered in Configuring the 4-20 mA Rate Output section of the manual.
The 4-20.oUt/Err Lo error message indicates the flow rate is below the calibrated
low flow rate setting. The output current will be 3.9 mA. The Error message

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appears on the lower line of the display only during the time that the condition exists.
When any key is pressed during the error condition, the 4-20.oUt message appears
on the upper line of the display and the Err Lo message appears on the lower line of
the display. This error may be caused by the flow rate falling below the low flow rate
calibration point or the low flow rate calibration point being set too high for normal
operating conditions. Changing the low flow rate calibration point is covered in
Configuring the 4-20 mA Rate Output section of the manual.
Calibration
Calibration of the MC-II Plus Flow Analyzer is a simple matter of entering the
necessary parameters for calibration into the instrument by way of the keypad. The
user friendly prompts and the ability of the MC-II Plus Flow Analyzer microprocessor
circuitry to calculate the divisor for volume calculation and the rate multiplier for rate
calculation make calibrating the instrument a simple process.
The steps followed to calibrate the MC-II Plus Flow Analyzer depend on whether
liquid or gas is being measured and the units of measure. There are four categories
of measurement:
•Liquid Measurement Using Preprogrammed Units of Measure
•Gas Measurement Using Preprogrammed Units of Measure
•Liquid Measurement Using a Calculated Divisor and Rate Multiplier
•Gas Measurement Using a Calculated Divisor and Rate Multiplier
The steps followed to calibrate the MC-II Plus Flow Analyzer for each of these
categories are outlined in the following sections.
Liquid Measurement Using Preprogrammed Units of Measure
When the liquid volume is to be expressed in barrels (BBL), gallons (GAL) or cubic
meters (M³) and the rate is to be expressed in barrels per day (BPD), gallons per
minute (GPM) or cubic meters per day (M³/D), the MC-II Plus Flow Analyzer
calculates the divisor and rate multiplier. The information needed to calibrate the
MC-II Plus Flow Analyzer is the units of measure for volume, the decimal point
setting for the volume display, decimal point setting of the meter factor, the meter
factor in pulses per gallon (PgAL), and units of measure for the rate. An outline of
the user prompts and the steps followed for this type of calibration are below:
1. Press the ACCESS key to enter the Calibrate Mode.
2. At the prompt tot Eng, press INCR to select BBL, GAL, or M³. Press ENTER.
3. At the prompt tot d.P, press INCR to change the decimal point position for the
volume. Press ENTER.

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4. At the prompt SEt tot, press INCR to toggle between yES or no. If no is
selected, press ENTER. If yES is selected, see the section Presetting Volume.
5. At the prompt PgAL d.P, press INCR to set the pulses per gallon decimal point.
Press ENTER.
6. At the prompt Ent.P.gAL, use the INCR and STEP keys to enter the meter
factor in pulses per gallon. Press ENTER.
7. At the prompt rAtE.Eng, press INCR to select BPD, GPM, or M³/D. Press
ENTER.
8. At the prompt rAtE.dLY, press INCR to set the flow rate filter. Press ENTER.
9. At the prompt inP.SenS, press INCR to set the input sensitivity. If the input
sensitivity is set as desired, press ENTER. If the input sensitivity needs to be
changed, see the section Setting Input Sensitivity.
10. At the prompt PULS.oUt, press INCR to select oFF or on for the pulse output
feature. If oFF is selected, press ENTER. If on is selected, see the section
Configuring Pulse Output.
11. At the prompt 4-20.oUt, press INCR to select oFF or on for the 4-20 mA output
feature. If oFF is selected, press ENTER. If on is selected, see the section
Configuring the 4-20 mA Rate Output.
12. At the prompt CodE, press INCR to select oFF or on for the security code
feature. If oFF is selected, press ENTER. If on is selected, see the section
Setting a Security Code.
A detailed example of this method, using actual meter factors and step-by-step data
entry is below.
Example: Liquid Measurement Using Preprogrammed Units of Measure
The MC-II Plus Flow Analyzer will be connected to a 1” NuFlo liquid turbine meter.
The meter factor is 907.68 pulses per gallon. The volume will be measured in
barrels and displayed to the tenth of barrel. The 4-20 mA rate output and pulse
output will not be utilized. The security code is disabled and the MC-II Plus Flow
Analyzer is in the Run Mode. No preprogrammed volume is to be entered. The
input sensitivity is to be left at the factory default of 20 mV.
1. Press the ACCESS key to enter the Calibrate Mode. The MC-II Plus Flow
Analyzer enters a self-diagnostics routine by performing a segment test that
momentarily displays all segments of the LCD. It then displays the firmware
version by showing Prog no on the upper line of the display and the firmware
version on the lower line of the display.
2. After the diagnostics routine is complete, the upper line of the display will show
the prompt tot Eng. Pressing INCR will select the engineering units of
measurement from BBL, GAL, M³, MCF, which are displayed on the right side of

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the display or USEr on the lower line of the display (factory default is BBL).
Press INCR until BBL is selected. Press the ENTER key to confirm the selection.
3. The MC-II Plus Flow Analyzer displays tot d.P on the upper line of the display
and zeros with a decimal point on the lower line of the display. This prompt is
requesting the decimal point position for the volume display (factory default is
0.0). The currently selected volume and rate units of measure are also displayed
(factory default is BBL). Repeatedly pressing the INCR key will move the
decimal point from 0.0 to 0.00 to 0.000 to 0 and return to 0.0. Press the INCR
key until 0.0 is displayed. Press the ENTER key to confirm the selection.
4. The upper line of the display of the MC-II Plus Flow Analyzer will show the
prompt SEt tot with either yES or no on the lower line of the display prompting
for a decision if a preprogrammed volume is to be entered (factory default is no).
Since no preprogrammed volume is to be entered, press INCR to toggle between
yES or no until no is displayed. Press the ENTER key to confirm the selection.
(See the section Presetting Volume to preset a volume.)
5. The upper line of the display will show the prompt PgAL d.P. The available
selections are 0.0, 0.00, 0.000 and 0 (factory default is 0.00). Since the meter
factor in this example is 907.68, a decimal point in the 0.00 position is to be
selected. Press INCR until 0.00 is shown on the lower line of the display. Press
the ENTER key to confirm the selection.
6. The upper line of the display will show the prompt Ent.P.gAL, which is the
prompt to enter the meter factor in pulses per gallon. The lower line of the
display will show the previously entered meter factor. The factory default is
900.00. The right-most digit, the hundredths position, will be blinking indicating it
is the digit currently selected for editing.
Since 8 is to be entered in this position (factor of 907.68) press INCR until 8 is
displayed. (Remember that if the desired digit is accidentally passed, continue to
press INCR until that digit is displayed again.)
Press STEP to proceed to the next digit to the left (the tenths position). Press
INCR until 6 is displayed.
Press STEP to proceed to the ones position. Press INCR until 7 is displayed.
Press STEP to proceed to the tens position. Press INCR until 0 is displayed.
Press STEP to proceed to the hundreds position. Press INCR until 9 is
displayed. Since the meter factor is now entered, the remaining digits to the left
of the factor must all be zero.
Press STEP to proceed to the thousands position. Press INCR until 0 is

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displayed.
Press the ENTER key to confirm the entry of the meter factor.
7. The upper line of the display will show the prompt rAtE.Eng, which is the prompt
to enter the units of measure for the rate. Pressing INCR will select the
engineering rate units of measure from barrels per day (BPD), gallons per minute
(GPM), cubic meters per day (M³/D), or USEr (default is based on the volume
units setting in Step 2, in this example BPD will be displayed). Press INCR until
BPD is shown on the right side of the display. Press the ENTER key to confirm
the selection.
8. The upper line of the display will show the prompt rAtE.dLY. The lower line of
the display will show the flow rate filter value in terms of the number of samples
required to reach 90% of the final value. The factory default setting is “nonE.”
The available settings are nonE, 5, 10, and 20. Press INCR until 10 is displayed.
Then, press ENTER. (See the section Setting Flow Rate Filter to change the flow
rate filter.)
9. The upper line of the display will show the prompt inP.SEnS with the lower line of
the display showing the input sensitivity in terms of millivolts peak-to-peak (mV).
The factory default input sensitivity is 20 mV. The available settings are 20, 40,
60, 80, 100 and 120 mV. If the lower line of the display shows 20 (for 20 mV)
then press ENTER. If any other value is shown, press INCR until 20 is
displayed, then press ENTER. (See the section Setting Input Sensitivity to
change the input sensitivity.)
10.The upper line of the display will show the prompt PULS.oUt with the lower line
of the display showing oFF or on (factory default is oFF). Press INCR until oFF
is shown since the pulse output is to be disabled. Press ENTER. (See the
section Configuring Pulse Output to configure the pulse output feature.)
11.The upper line of the display will show the prompt 4-20.oUt with the lower line of
the display showing oFF or on (factory default is oFF). Press INCR until oFF is
shown, since the 4-20 mA output circuitry is to be disabled. Press ENTER. (See
the section Configuring the 4-20 mA Rate Output to configure the 4-20 mA output
feature.)
12.The upper line of the display will show the prompt CodE with the lower line of the
display showing oFF or on (factory default is oFF). Press INCR until oFF is
shown, since the security code feature is to be disabled. (See the section Setting
a Security Code to enter a security code.) Press ENTER. Since this is the last
step of calibration, the MC-II Plus Flow Analyzer automatically returns to the Run
Mode. The ACCESS key of the MC-II Plus Flow Analyzer does not have to be
pressed to return to Run Mode unless Calibrate Mode is exited before the last
step of calibration. See the data entry Flow Chart in Appendix C.

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Gas Measurement Using Preprogrammed Units of Measure
When the gas volume is to be expressed in thousands of cubic feet (MCF) and the
rate is to be expressed in thousands of cubic feet per day (MCF/D), the MC-II Plus
Flow Analyzer calculates the divisor and rate multiplier, compensating the volume
and rate to standard conditions. The information needed to calibrate the MC-II Plus
Flow Analyzer is the decimal point setting for the volume display, the decimal point
setting for the meter factor, the meter factor expressed in pulses per actual cubic
foot (PACF), atmospheric pressure, base pressure, flowing pressure, base
temperature, flowing temperature and average supercompressibility factor (optional).
An outline of the user prompts and the steps followed for this type of calibration are
below:
1. Press the ACCESS key to enter the Calibrate Mode.
2. At the prompt tot Eng, press INCR until MCF is selected. Press ENTER.
3. At the prompt tot d.P, press INCR to change the decimal point position for the
volume. Press ENTER.
4. At the prompt SEt tot, press INCR to toggle between yES or no. If no is
selected, press ENTER. If yES is selected, see the section Presetting Volume.
5. At the prompt PACF d.P, press INCR to set the pulses per actual cubic foot
decimal point. Press ENTER.
6. At the prompt Ent.P.ACF, use the INCR and STEP keys to enter the meter
factor in pulses per actual cubic foot. Press ENTER.
7. At the prompt bAro.Psi, use the INCR and STEP keys to enter the barometric
pressure in pounds per square inch absolute (PSIA). Press ENTER.
8. At the prompt bASE.Psi, use the INCR and STEP keys to enter the base
pressure in PSIA. Press ENTER.
9. At the prompt Ent.Psig, use the INCR and STEP keys to enter the average
flowing pressure in pounds per square inch (PSIG). Press ENTER.
10. At the prompt bASE F, use the INCR and STEP keys to enter the base
temperature in degrees Fahrenheit (F). Press ENTER.
11. At the prompt Ent F, use the INCR and STEP keys to enter the average flowing
temperature in degrees F. Press ENTER.
12. At the prompt Ent FPv, use the INCR and STEP keys to enter the average
supercompressibility factor. Press ENTER.
13. At the prompt rAtE.dLY, press INCR to set the flow rate filter. Press ENTER.
14. At the prompt inP.SenS, press INCR to set the input sensitivity. If the input
sensitivity is set as desired, press ENTER. If the input sensitivity needs to be
changed, see the section Setting Input Sensitivity.

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15. At the prompt PULS.oUt, press INCR to select oFF or on for the pulse output
feature. If oFF is selected, press ENTER. If on is selected, see the section
Configuring Pulse Output.
16. At the prompt 4-20.oUt, press INCR to select oFF or on for the 4-20 mA output
feature. If oFF is selected, press ENTER. If on is selected, see the section
Configuring the 4-20 mA Rate Output.
17. At the prompt CodE, press INCR to select oFF or on for the security code
feature. If oFF is selected, press ENTER. If on is selected, see the section
Setting a Security Code.
A detailed example of this method, using actual meter factors and step-by-step data
entry is below.
Example: Gas Measurement Using Preprogrammed Units of Measure
The MC-II Plus Flow Analyzer will be connected to a 2” NuFlo standard range gas
turbine meter. The meter factor is 129.42 pulses per actual cubic foot. The volume
units of measure will be in thousands of standard cubic feet (MCF) and the rate units
of measure will be in thousands of standard cubic feet per day (MCF/D). The
average flowing pressure is 120 PSIG. The average flowing temperature is 50
degrees Fahrenheit. The base pressure is 14.73 PSIG and the base temperature is
60 degrees Fahrenheit. The atmospheric pressure is not
known but the elevation of the installation is 1000 feet above sea level. The 4-20
mA output, pulse output and security code are to be disabled. The input sensitivity
is to be left at 20 mV and no preprogrammed volume is to be entered. The MC-II
Plus Flow Analyzer has not been calibrated and all data in the MC-II Plus Flow
Analyzer is set to factory default. The MC-II Plus Flow Analyzer is in the Run Mode.
1. Press the ACCESS key to enter the Calibrate Mode. The MC-II Plus Flow
Analyzer enters a self-diagnostics routine by performing a segment test that
momentarily displays all segments of the LCD. The firmware version is then
displayed by showing Prog no on the upper line of the display and the firmware
version on the lower line of the display.
2. After the diagnostics routine is complete, the upper line of the display will show
the prompt tot Eng. Pressing INCR will select the engineering units of
measurement from BBL, GAL, M³, MCF, which are displayed on the right side of
the display or USEr on the lower line of the display (factory default is BBL).
Press INCR until MCF is selected. Press the ENTER key to confirm the
selection.
3. The MC-II Plus Flow Analyzer will show the prompt tot d.P on the upper line of
the display and zeros with a decimal point on the lower line of the display. The
currently selected engineering units of measurement are also displayed (MCF in
this example). This prompt is requesting the decimal point position for the

MC-II Plus WP-PM Flow Analyzer
12 May 2005
volume display. Repeatedly pressing the INCR key will move the decimal point
from 0.0 to 0.00 to 0.000, 0 and return to 0.0 (factory default is 0.0). Press the
INCR key until 0 is displayed. Press the ENTER key to confirm the selection.
4. The MC-II Plus Flow Analyzer will show the prompt SEt tot on the upper line of
the display with either yES or no on the lower line of the display prompting for a
decision if a preprogrammed volume is to be entered (factory default is no). The
currently selected engineering units of measurement are also displayed (MCF is
shown in this example). Since no preprogrammed volume is to be entered, press
INCR to toggle between yES or no until no is displayed. Press ENTER. (See
section Presetting Volume to enter a preset volume.)
5. The upper line of the display will show the prompt PACF d.P. The available
selections are 0.0, 0.00, 0.000 and 0 (factory default is 0.00). Since the meter
factor in this example is 129.42 pulses per actual cubic foot, a decimal point in
the 0.00 position is to be selected. Press INCR until 0.00 is shown on the lower
line of the display. Press ENTER.
6. The upper line of the display will show the prompt Ent.P.ACF, which is the
prompt to enter the meter factor in pulses per actual cubic foot. The lower line of
the display will show the previously entered meter factor (factory default is
125.00). The right-most digit, the hundredths position, will be blinking, indicating
it is the digit currently selected for editing. Since 2 is to be entered in this
position (factor of 129.42) press INCR until 2 is displayed. (Remember that if the
desired digit is accidentally passed, continue to press INCR until that digit is
displayed again.) Press STEP to proceed to the next digit to the left (the tenths
position). Press INCR until 4 is displayed.
Press STEP to proceed to the ones position. Press INCR until 9 is displayed.
Press STEP to proceed to the tens position. Press INCR until 2 is displayed.
Press STEP to proceed to the hundreds position. Press INCR until 1 is
displayed. Since the meter factor is now entered, the remaining digits to the left
of the factor must all be zero.
Press STEP to proceed to the thousands position. Press INCR until 0 is
displayed.
Press ENTER to confirm the entry of the meter factor.
7. The upper line of the display will show bAro.PSi prompting for barometric
pressure in pounds per square inch absolute (PSIA) (factory default is 14.73 and
the decimal point is fixed at 0.00). Since the barometric pressure is not known,
but the elevation is known to be 1000 feet above sea level, refer to Appendix E,
Table 1. The average barometric pressure for this altitude is 14.21 PSIA. Enter

MC-II Plus WP-PM Flow Analyzer
May 2005 13
the barometric pressure in the lower line of the display using the INCR and STEP
keys in the same manner as the meter factor was entered in Step 6. Once the
barometric pressure is entered, press ENTER.
8. The upper line of the display will show bASE.PSi prompting for the base
pressure in PSIA (factory default base pressure is 14.73 PSIA). The decimal
point is fixed at 0.00. Enter the base pressure of 14.73 in the lower line of the
display using the INCR and STEP keys in the same manner as the meter factor
was entered in Step 6. Once the base pressure is entered, press ENTER.
9. The upper line of the display will show Ent.PSig prompting for the average
flowing pressure in pounds per square inch (PSIG) (factory default pressure is
100.0 PSIG with the decimal point fixed at 0.0). The line pressure is 120 PSIG.
Enter 120.0 in the lower line of the display in the same manner as the meter
factor was entered in Step 6. Once the line pressure is entered, press ENTER.
10.The upper line of the display will show bASE F prompting for entry of the base
temperature in degrees Fahrenheit (F) (factory default is 60.0 degrees with the
decimal point fixed at 0.0). The base temperature is 60 degrees F. Enter 60.0 in
the lower line of the display in the same manner as the meter factor was entered
in Step 6. Once the base temperature is entered, press ENTER.
11.The upper line of the display will show Ent F prompting for the entry of the
average flowing temperature in degrees F (factory default is 60.0 degrees with
the decimal point fixed at 0.0). The line temperature is 50 degrees F. Enter 50.0
in the lower line of the display in the same manner as the meter factor was
entered in Step 6. Once the line temperature is entered, press ENTER.
12.The upper line of the display will show Ent FPv prompting for entry of the
average supercompressibility factor (factory default is 1.00000 with the decimal
point fixed at 0.00000). Since the average supercompressibility factor will not be
entered, the number 1.00000 should be placed in the lower line of the display.
Since the default value is 1.00000, press ENTER. (If an average
supercompressibility factor is to be entered, it can be entered in the same
manner as the meter factor was entered in Step 6. While entering the average
supercompressibility factor, keep in mind that the decimal point position is fixed.)
13.The upper line of the display will show the prompt rAtE.dLY. The lower line of
the display will show the flow rate filter value in terms of the number of samples
required to reach 90% of the final value. The factory default setting is “nonE.”
The available settings are nonE, 5, 10, and 20. Press INCR until 10 is displayed.
Then, press ENTER. (See the section Setting Flow Rate Filter to change the flow
rate filter.)
14.The upper line of the display will show inP.SEnS prompting for the entry of the
input sensitivity. Since the input sensitivity (default 20 mV), pulse out (default

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14 May 2005
off), 4-20 mA out (default off) and security code (default off) are all to be left in
the default condition, press ACCESS to return to the Run Mode. (Keep in mind
that the example for this unit was factory default. Bypassing these steps in this
case is acceptable. If the MC-II Plus Flow Analyzer was previously calibrated
and the settings of these functions is unknown, these functions must be stepped
through to ensure that they are set as desired.)
Liquid Measurement Using a Calculated Divisor and Rate Multiplier
Calculating the divisor and rate multiplier for liquids is necessary when registering
the volume in units other than cubic meters, barrels, or gallons. USEr units may be
used for the volume and preprogrammed units for the rate, or USEr units may be
used for both the volume and the rate. When the USEr units are used for the
volume or rate, nothing will be shown on the right side of the display where the units
are normally displayed. Each MC-II Plus Flow Analyzer is shipped with a label set
containing commonly used volume and rate units of measure labels. The
appropriate label can be placed on the front panel on the right side of the LCD
viewing window. The part number for the label set is listed in Appendix B in the
spare parts list. The divisor, divisor decimal point, rate multiplier, and rate multiplier
decimal point must be determined, then entered directly into the MC-II Plus Flow
Analyzer. The formula for calculating the divisor is:
Divisor = FC x CON
Where:
FC = meter factor in pulses per gallon (P/G)
CON = The conversion factor for number gallons per unit volume of desired measure.
Note: When calibrating the MC-II Plus Flow Analyzer, enter the six most significant
digits of the divisor regardless of the setting of the volume decimal point. The divisor
does not have to be adjusted to the volume decimal point setting as is it does in
many other flow analyzers.
The formula for calculating the rate multiplier is:
Note: The term rate multiplier is the same as rAtE.FAC.
()
CONFCTC
lierRateMultip × =
Where:
TC = Time Constant (seconds per unit time)