Liquid Controls SCAMP User Manual

SET-UP & OPERATION MANUAL

SCAMP™*

Scaled, Compensated, and Multi-Point
Flowmeter Signal Conditioner

* Protected by U. S. Patent No. 6,535,830

1

TABLE OF CONTENTS

SUBJECT PAGE

Table of Contents.............................................................................................................. 2

Overview ........................................................................................................................... 3

Installing SCAMP and Making Basic Electrical Connections ............................................ 4

Powering Up SCAMP........................................................................................................ 4

Programming Meter k-Factor ............................................................................................ 5

Computing and Programming Multi-Point Calibration Data (Optional)........................ 6 – 9

Temperature Volume Compensation (Optional) ..................................................... 10 – 11

Fault Indicator/Electromechanical Totalizer (Optional) ...................................................12

Final Checkout Flow Test................................................................................................ 12

Error Messages.......................................................................................................13 – 14

Trouble Shooting............................................................................................................. 15

Appendix A, Specifications.............................................................................................. 16

Appendix B, SCAMP Function Tables ............................................................................ 17

Appendix C, Calculating the k-Factor for your Meter ...............................................18 - 19

Appendix D, Nominal Raw Pulser Resolution of LC Meters …..………………………….19

Electrical Safety
NOTE: This equipment is suitable for Class I, Division 2, Groups C and D, or non-

hazardous locations, only.

Electromagnetic Compatibility Limitation
NOTE: This (equipment and/or system) is suitable for use in all establishments other

than domestic and those directly connected to the low voltage power supply network
which supplies buildings used for domestic purposes.

WARNING

The SCAMPTM circuit board and attendant equipment including but not limited to 9-18
VDC power supply, 2-channel quadrature pulser, and electronic counter (whether
supplied by Liquid Controls or others) must be installed and operated in accordance with
all applicable national and local electrical, environmental, and safety codes. Failure to
do so could result in serious injury or death.

Explosion Hazard – Substitution of components may impair suitability for Class I,
Division 2.

Explosion Hazard - Do not disconnect equipment unless power has been switched off
or the area is known to be non-hazardous.

NOTE: The rotary data switches on SCAMP can be damaged by extensive or rough
rotation of the mechanism. Please exercise appropriate care when setting all data
values on the rotary switches.

TOOLS REQUIRED: Small flat-blade screwdriver for attaching wires to terminal strips
and making adjustments to rotary switches.

2

OVERVIEW

SCAMP

TM

is an advanced electronic flowmeter signal conditioner that converts the

output signal from the flowmeter to a volumetric unit of measure. SCAMP also
temperature corrects the volume delivered to an API standard or to a programmable
coefficient of expansion, and has the ability to linearize the flowmeter accuracy at up to
sixteen points over its entire flow range. SCAMP is factory programmed and calibrated
to provide a volumetrically correct, Weights & Measures approved and sealed,
quadrature pulse output. The SCAMP output pulse can be used to operate most pulse
actuated electronic counters, flow computers, PLC’s or other electronic control devices.

SCAMP is micro-processor driven, and features a regulated power supply to protect
against voltage transients, easy-to-use binary coded decimal (BCD) switches for data
entry, watchdog timer to ensure reliable execution of software code, and a 7-segment
LED display for data verification and error messaging.

SCAMP is ready for operation with a minimum of mounting requirements and external
wiring connections as described in Steps 1 and 2 on the following page. After
installation but before final commissioning, the customer should verify that all factory­programmed parameters are resident in SCAMP memory, and that all data agrees with
the values listed on the Meter Calibration Sheet included with the meter.

NOTE: It is important that the SCAMP circuit board be paired with the meter for which it
has been factory calibrated. Proper pairing of SCAMP and meter can be confirmed by
matching Serial Number data for the meter and SCAMP, as recorded on the Meter
Calibration Sheet. If the SCAMP circuit board is applied to a different meter, all
calibration data for the meter must be re-computed and entered into SCAMP as
described later in this manual.

HELPFUL HINT: Customer-entered data values are setup by first selecting one of the
basic SCAMP functions on the Function Switch (see Appendix B), and then setting the
numeric data for that function on the five Data Switches on the SCAMP circuit board.
Data is entered in memory by depressing the Data Entry pushbutton located on the
SCAMP circuit board to the right of the Function Switch (see diagram on following page).
Recovery from mis-entered or incorrect data is easy with SCAMP: simply re-position the
Data Switches to the proper settings, and depress the Data Entry pushbutton.

NOTE: On occasion, it may be desireable to clear all customer data from the SCAMP
non-volatile memory and re-enter new data. This can be accomplished by performing a
“Clear All” operation. To perform the “Clear All”, set the Function Switch to “0”, set all
Data Switches to “0”, move the “0/1” jumper to the “0” position, and the “LOCK” jumper
to the left-most position to unlock the unit, and then depress the Data Entry Pushbutton.
This procedure should only be utilized in special cases involving complete
reconfiguration of your unit. WARNING: After a successful “Clear All” operation, it

will be necessary to re-enter all calibration data. To minimize the re-calibration
effort, you may want to record all accessible data and Error Messages (Function
Switch position “E”) before performing the “Clear All”.

3

INSTALLING SCAMP AND MAKING BASIC ELECTRICAL CONNECTIONS

STEP 1. The SCAMP circuit board measures 4” X 3”. Corner mounting holes (0.144” ID)

are provided on 3.640” centers and 2.640” centers, respectively. The circuit board
should be mounted in a suitable environmentally sealed compartment, with the top
surface of the board (surface with terminal strips and switches) positioned to provide
easy access and viewing. Mounting the board to a vertical panel is recommended to
guard against condensation moisture accumulating on the PC board surface.

STEP 2. Connect the SCAMP circuit board to peripheral equipment including 9-18 VDC
power supply, 2-channel quadrature pulser, electronic counter, RTD temperature probe
(optional), and fault indicator/electromechanical counter (optional), as shown in the
diagram below. NOTE: Phase A and Phase B pulser outputs (Terminals 7 and 8) are
unpowered “current-sinking” open-collector outputs. Customer-supplied pull-up resistors
(300-ohm minimum) may be required between terminals 6 – 7, and 6 – 8, if not already
included in the customer-supplied electronic counter.

Term

Connection

1 +5V out to power pulser
2 Channel A in from Pulser
3 Channel B in from Pulser
4 Ground to Pulser
5 Ground to Power Supply
6 9 to 18 VDC Power Supply
7 Phase A to Counter
8 Phase B to Counter
9 Fault Output (optional) or low

frequency counter
10 Gnd return for output pulses
24 RTD (optional)
25 RTD (optional)

WARNING! Do not disconnect while circuit is live unless area is known to be non-hazardous.

POWERING UP SCAMP

STEP 3: Carefully check that all wiring has been made in conformance with the

directions in Step 2, and in conformance with all applicable national and local electrical,
environmental, and safety codes and ordinances appropriate for this type of equipment.
Then, turn power on to the unit. The 7-segment LED display on SCAMP should light up
and execute a segment test within approximately 1-second of power being supplied to
the unit.

4

PROGRAMMING METER K-FACTOR

Your SCAMP circuit board has been factory calibrated to include a four-digit k-Factor for
your specific meter (only if SCAMP is sold separately, i.e., without a meter, is calibration
data not entered at the factory). The k-Factor is a number represented by the ratio of
pulse edges into SCAMP (from the pulser) and whole pulses per channel out of SCAMP
(to the electronic counter). The value of the k-Factor is a number in the range of 4.000
to 9999.

IMPORTANT: PERFORM THESE OPERATIONS BEFORE PROCEEDING!

Before beginning any programming, move the “LOCK” jumper located on the right-hand
side of the circuit board to the left-most position to unlock the unit. Also, move the
jumper marked “0/1” to the “0” position. NOTE: Care should be taken when the unit is
unlocked because factory loaded data can be lost or altered if the Data Entry pushbutton
switch is inadvertently depressed.

STEP 4A. Checking the Factory Programmed k-Factor

♦ Set the Function Switch located on the lower right-hand side of the SCAMP circuit

board to the “0” position. Observe the k-Factor value scrolling on the LED display.
The scrolling value will be a number such as “F19.58”. Confirm that the number
appearing on SCAMP is identical to the k-Factor listed on your Meter Calibration
Sheet. If the k-Factor is correctly entered in SCAMP, you may proceed to the next
page “Computing and Programming Multi-Point Calibration Data”. If no data is
present, an “F0” will scroll across the LED display and you should proceed to Step
4B.

STEP 4B. Programming a New k-Factor in the Field
If required, a new k-Factor is easily programmed into SCAMP. Refer to your Meter
Calibration Sheet for a factory-determined value, or to Appendix C for a detailed
discussion on the calculation of a new k-Factor for your meter. Then, return to this step
for loading the value into memory.

♦ Set the Function Switch located on the SCAMP circuit board to the “0” position.
♦ Set the Data Switches located along the top edge of the SCAMP circuit board to the

appropriate values to represent the four digit k-Factor for your meter, starting with
the left-most switch (sw5). The right-most switch (sw1) is reserved for an extra digit
to establish positioning (left-shifting) of the decimal point. For example, a k-Factor of

19.58 would be entered as 19582, where the last digit (“2”) specifies the positioning
of the decimal point, i.e., two places to the left. The range of valid entries is 4.000 to

9999.

♦ Depress the Data Entry Pushbutton located on SCAMP to enter the new k-Factor

value into memory. The LED display will now scroll the new value to verify that it has
been successfully loaded into memory.

5

COMPUTING & PROGRAMMING MULTI-POINT CALIBRATION DATA (optional)

Multi-point calibration permits compensating for inherent meter error across the full
range of flow rates for the meter, thereby providing near-perfect meter accuracy for
deliveries from maximum flow to minimum flow. SCAMP allows multi-point calibration for
up to 16 different flow rates. Typically, the majority of the selected flow rates will be in
the low to mid flow range where most meter inaccuracy occurs.

Two data entries are required for each linearization point to complete a multi-point
calibration: i.e., specification of a target flow rate, expressed in pulse edges per second,
and specification of a percentage error at that flow rate as determined by prover runs or
reference to the Meter Calibration Sheet.

IMPORTANT: PERFORM THIS OPERATION BEFORE PROCEEDING!
When accessing the multi-point calibration data in steps 5A through 5C below, ensure
that the “0/1” jumper is in the “1” position.

NOTE: It is NOT required that multi-point data be programmed for each or any of the 16
available points. If the data entered into SCAMP matches the data on your Meter
Calibration Sheet, you may move ahead to Step 6.

STEP 5A: Checking the Factory Programmed Multi-Point Calibration Data

♦ Set the Function Switch in the “0” position, and observe the scrolling LED display

to confirm that the same value is indicated by the LED display as listed on the Meter
Calibration Sheet. Your scrolling display will consist of the alpha character “F”
followed by up to four digits identifying the flow rate in pulse edges per second for
which the calibration was made. Immediately following is the alpha character “P”
followed by the value representing the percentage error at that flow rate. For
example, “F2447 P0.113” represents a 0.113% delivery error at the flow rate
represented by 2447 pulses per second. A display of “E20” indicates that no
correction has been programmed for that point.

♦ Repeat this verification procedure by placing the Function Switch in positions 1

through F to confirm that the correct data is loaded into the SCAMP memory. Use
the Meter Calibration Sheet as your reference.

STEP 5B: Entering Multi-Point Calibration Data (From Meter Calibration Sheet)

If the factory-programmed multi-point calibration data has been inadvertently lost from
memory or needs to be changed it can be entered into SCAMP by referencing your
Meter Calibration Sheet and performing the following operations.
♦ Move the Function Switch to the “0” position. If there is no data (display shows

“E20”), or if you wish to change the value currently in memory, proceed as follows:

♦ Set the Data Switches located along the top edge of the SCAMP circuit board to the

appropriate values to represent the flow rate in pulse edges per second for your
meter. Refer to your Meter Calibration Sheet. Start with the left-most switch (sw5).
The right-most switch (sw1) is reserved for an extra digit to establish positioning (left­shifting) of the decimal point. For example, a pulse rate of 3704 would be entered as
37040, where the last digit (“0”) specifies the positioning of the decimal

6