Oval EL4501 User manual

1
Ins. No. E-888-5-E
This manual has been prepared to provide you with the information pertinent to the Multipoint
Temperature Compensated FLOW COMPUTER.
With the proper application of the information and knowledge contained in this manual, you can expect
the best possible results over a long service life of this instrument. Keep this manual for ready reference.
It is suggested that the instruction manuals for the companion pulse generator (flowmeter) and receiving
instrument be referred to at the same time.
Multipoint temperature compensated
FLOW COMPUTER
MODEL：EL450 1

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TABLE OF CONTENTS
1. BEFORE YOU BEGIN........................................................................................................................... 4
1.1 Confirming the Nameplate .............................................................................................................. 4
1.2 Transportation Precautions ............................................................................................................. 4
1.3 Storage Precautions........................................................................................................................ 4
2. GENERAL ........................................................................................................................................... 5
2.1 Features ........................................................................................................................................ 5
2.2 Part Names ................................................................................................................................... 5
3. INSTALLATION ................................................................................................................................... 6
3.1 Outline Dimensions ....................................................................................................................... 6
3.2 Installation ..................................................................................................................................... 6
3.2.1 Installation Location ................................................................................................................ 6
3.2.2 Panel ....................................................................................................................................... 6
3.2.3 Installation ............................................................................................................................... 6
4. WIRING ................................................................................................................................................ 7
4.1 Field Wiring Cables ....................................................................................................................... 7
4.2 Wiring Connections ....................................................................................................................... 7
4.3 Description of Terminal Blocks for External Connections.............................................................. 7
5. GENERAL SPECIFICATIONS............................................................................................................... 9
6. INTERNAL COMPONENTS AND FUNCTIONS.................................................................................. 10
6.1 Front Panel.................................................................................................................................... 10
6.1.1 Display .................................................................................................................................... 10
6.1.2 On-Screen Menu Items........................................................................................................... 10
6.1.3 Error Messages...................................................................................................................... 11
6.1.4 Front Panel Keypad .................................................................................................................11
7. CALCULATION FORMULAS............................................................................................................... 12
7.1 Uncorrected Total Flow.................................................................................................................. 12
7.2 Flow Velocity and Viscosity Related Meter Error Correction Formula (E 1 ).................................... 12
7.3 Meter Body's Volume Expansion (3α) Related Meter Error Correction Formula (E 2 ) .................. 12
7.4 Correction Factor in Implementation of Temperature Correction on Petroleums .......................... 13
7.5 Flow Calculation Formula.............................................................................................................. 13
8. PREPARATIONAL CHECKS AND OPERATION................................................................................. 14
8.1 Preparation Before Operation ....................................................................................................... 14
8.2 Preparational Checks.................................................................................................................... 14
8.3 Operation ...................................................................................................................................... 14
9. TROUBLESHOOTING ........................................................................................................................ 15
10. ERROR MESSAGES .......................................................................................................................... 16
11. BEHAVIOR IN ERRATIC CONDITIONS.............................................................................................. 16
12. OVERALL BLOCK DIAGRAM ............................................................................................................. 17
13. PRODUCT CODE EXPLANATION ..................................................................................................... 18
CONVENTIONS
Shown in this manual are the signal words NOTE, CAUTION and WARNING, as described
in the examples below:
NOTE: Notes are separated from the general text to bring the user's attention to
important information.
CAUTION: Caution statements signal the user about hazards or unsafe practices
which could result in minor personal injury or product or property
damage.
WARNING: Warning statements signal the user about hazards or unsafe practices
which could result in severe personal injury or death.

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COMPANION VOLUME
KEY OPERATION MANUAL Ins. No. E-880TM-E
CONTENTS
1. KEY ARRANGEMENT........................................................................................................... 10
2. DISPLAY SCREEN................................................................................................................ 11
3. INITIAL CHECK..................................................................................................................... 14
4. MODE SELECTION .............................................................................................................. 18
5. RUN MODE SCREEN ........................................................................................................... 23
6. SET MODE............................................................................................................................ 36
7. SYS MODE ......................................................................................................................... 142
8. EL4401 ................................................................................................................................ 170
9. EL4501 ................................................................................................................................ 175
10. DIP SWITCH CONFIGURATION ........................................................................................ 182
(※: Model with communication capabilities)
COMMUNICATION MANUAL (※) Ins. No. E-880CM-E
CONTENTS
1. COMMUNICATION CAPABILITY OVERVIEW........................................................................ 5
2. NETWORK CONFIGURATION ............................................................................................... 5
3. MODE SELECTION ................................................................................................................ 6
4. LOCAL / REMOTE SELECTION .............................................................................................8
5. SETUP ITEMS FOR COMMUNICATION .............................................................................. 10
6. COMMUNICATION PROCEDURE........................................................................................ 11
7. COMMUNICATION FORMAT................................................................................................ 12
8. BCC / SUM CHECK .............................................................................................................. 45
9. CR / LF .................................................................................................................................. 46
10. CODES ASSIGNED TO UNITS............................................................................................. 48
11. ASCII CODE .......................................................................................................................... 49

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1. BEFORE YOU BEGIN
Every OVAL product is thoroughly tested and inspected before shipment from our factory.
When received, its appearance should be inspected for possible damage by rough handling during
transit. First of all, thoroughly read the handling precautions described in this section. For topics other
than those covered in this section, refer to the respective sections of this manual.
If at any time in the future you seek our assistance, contact the nearest sales office in your area.
1.1 Confirming the Nameplate
The instrument is adjusted to individual specifications
before shipment from our factory. Model number
appears on the nameplate attached to the top of
the housing.
Make sure to see that the instrument you received
conforms to the General Specifications and the
Product Code Explanation.
◆When you inquire, supply complete informa-
tion as to the product name, model number,
product number, ratings, and other pertinent
information.
1.2 Transportation Precautions
(1) In order to safeguard against damage during transit, transport your instrument to the installation
location in the original package used for shipment from the factory if possible.
(2) Use care to avoid impact shocks to the instrument during transit.
1.3 Storage Precautions
If the instrument upon receipt is to be stored for extended periods of time before installation, unexpected
problems could arise. If such is the case, the following considerations should be taken:
(1) The instrument can best be stored in the original package used for transit from the factory.
(2) The place of storage should meet the following requirements:
☆Free from rain and water
☆Free from vibration and impact shocks
☆With minimal temperature and humidity variation (around 25°C and 65% R.H.)
Fig. 1.1 Nameplate Location
Nameplate
(model number)
※
※EL4001 is the
generic desig-
nation of the
EL4001 series
computers.

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MODEL EL4001
TB 1 TB 2 TB 1 TB 2
TB 3
PLS OUT3 TEMP IN TEMP IN FLOW IN
0V
＋− B bA
＋−
＋−＋− ＋−
＋
−
SIG SUP
SUP
ANA OUTGND POWER
N
（
−
）
H
（
＋
）
PRESS INPLS OUT1
PLS OUT2
1/1
OUT
2. GENERAL
Using the most advanced electronic tehcnologies, this digital instrument has been developed specifically
to meet the most demanding flow measurement applications in petroleum products receiving facilities
where accuracy is the prime requirement.
In response to the liquid flowrate and temperature information arriving from the sensing terminal, such as
a flowmeter, it totalizes the flow while implementing meter error and temperature corrections.
An analog output and instant flowrate (corrected for meter error and temperature) output are additional
provisions.
2.1 Features
(1) Incorporated capabilities to calibrate meter error for viscosity and flow velocity (viscosity correction),
to correct by volumetric conversion factor (temperature correction), and to display the total flow
readings readily permit the application engineer to build a petroleum products measurement system
with this single instrument.
(2) Changing the meter factor, ranges of temperature, or other parameters, of the companion
flowmeter is simple by keystrokes on the front-panel keypad, or by inserting an IC card into the slot.
(3) Built around a microprocessor, the instrument carries out calculations entirely in digital signal
processing circuits to achieve a high degree of accuracy and reliability.
(4) Variables, such as temperature and totals, can be reviewed on command with the front panel
keypad, whether or not calculation is in progress.
(5) Viscosity and density settings are continuously adjustable. Also, by switching the oil kind, the
instrument is compatible with three different kinds of oils.
(6) Remote viscosity and density read/write through the communication link is acceptable.
(7) A nonvolatile memory (E2PROM) retains all parameters and variables. Variables are resettable
following a power cycle or reset if so configured.
2.2 Part Names and Functions
Fig. 2.1 Part Names
Function Keys
Display
IC Card
Shift Keys
Seal Screw
Terminal Blocks

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912596
20 232.4
144 136
Min.120
Min.220
92 ±0.8
0
+1
138 0
600
1800
450
2200
Optimum Range
AcceptableRange
Computer
3. INSTALLATION
3.1 Outline Dimensions
Fig. 3.1 Outline Dimensions
All dimensions in millimeters
Hold-down Fitting
3.2 Installation
3.2.1 Installation Location
Select an installation site where:
(1) Mechanical vibration, shock and corrosive gases are
negligible.
(2) Air is dry and temperature at room temperature and
stable.
NOTE: Although the manufacturer guarantees stated
performance at ambient temperatures up to
＋50°C, it is recommended that the instrument
be placed in service at room temperature.
(3) Provide a sufficient working space behind the instru-
ment - at least 50 centimeters from the back panel of
the instrument to facilitate wiring and servicing.
3.2.2 Panel
(1) Use a rigid steel sheet with a minimum thickness of
1.6 millimeters. 3.2mm thick is recommended.
(2) If it is required to install instruments alongside each
other, dimensions in Fig. 3.2 are suggested.
(3) Recommended mounting height is given in Fig. 3.3.
3.2.3 Installation
(1) Front mount the instrument through the cutout in the
panel.
(2) Fit the furnished enclosure hold-down fittings into the
top and bottom slots in the enclosure and, confirming
that the instrument is positioned horizontal, secure
the instrument to the panel with hold-down fittings
(Fig. 3.1).
Fig. 3.2 Panel Cut
Fig. 3.3 Instrument Mounting Height

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4. WIRING
(See the "Wiring Guidelines" in the instruction manual of the companion pulse generator.)
4.1 Field Wiring Cables
(1) Use electrostatically shielded, polyethylene insulated, vinyl sheathed control cables (CEVS, 1.25 to 2
mm, 2-conductor or 3-conductor), or equivalent, for input signal cables from the flowmeter.
For output signal cables, use insulated vinyl sheathed cables (CVV, CVS ... JIS C 3401).
(2) Ground the end of shield wire to "G" terminal of the instrument. At the sensor end, leave the end of
shield wire unconnected.
4.2 Wiring Connections
(1) Field wiring through a conduit is recommended.
NOTE: In routing field wiring, use a separate conduit for power cable from other signal cables to
eliminate the possibility of stray current pickup.
(2) Separate field wiring from other power lines and power circuits to minimize the possibility of inductive
interference.
(3) Using crimp-type lugs for wiring, ensure good electrical connections.
Terminals are found on the back of the instrument (Fig. 4.1).
4.3 Description of Terminal Blocks for External Connections
Terminal blocks for external connections (TB1, TB2,
and TB3) are found on the back of the instrument as
shown in Fig. 4.1. Terminal identification appears
in Table 4.1 while terminal connections appear in
Table 4.2.
NOTE: TB1 and TB2 terminal numbers are
indicated on the side of terminal blocks.
TB 1TB 2
1
2
3
TB 3
PLS OUT3 TEMP IN TEMP IN FLOW IN
0V
＋− B bA
＋−
＋− −＋−
＋−＋− ＋−
＋−
SIG SUP
0V SIG SUP
SUP
ANA OUT
GND POWER
N
（
−
）
H
（
＋
）
PRESS INPLS OUT1
COMM1
COMM2
TEMP
PLS OUT2
1/1
OUT
DENSITY IN
TB1 TB2
1 SUP.
Flow in
12 1 SUP.
Press. in
8＋Pulse out 2
2 SIG. 13 2 ＋9－
3 0V 14 3 －10
4 OUT 1/1 15 4 ＋Analog out 11
5 b
Temp. in
16 5 －12
6 B 17 6 ＋Pulse out 1 13
7 A 18 ＋Comm 1
※
7－
8＋19 －TB3
9－20 ＋Comm 2
※
1 H（＋） Power
10 ＋Alarm out 21 －2 N（－）
11 －3 GND
Fig. 4.1 Terminal Blocks for Ext. Connections
Table 4.1 Terminal Identification and Functions
Terminal
Screws
(M3.5)
CAUTION
Make wiring connections upon confirma-
tion of the validity of flowmeter (pulse
generator) to receiving instrument com-
bination by their product code number,
instrument number, etc.
NOTE : ※In case of selecting“Having communication function”

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TB1 TB2
No Label Description No Label Description
1
Flow in
SUP. 1
2 SIG. 2
3 0V 3
4 OUT 1/1 4 Analog out ＋
Temperature
4 to 20mADC/1 to 5VDC
5
Temp. in
b 5 －
6 B 6 Pulse out 1 No
polarity
Uncorrected total flow
Static relay
7 A 7
8＋8Pulse out 2 No
polarity
Total flow corrected for
viscosity Static relay
9－9
10
Pulse out 3 No
polarity
Total flow corrected for
viscosity and temperature
Static relay
10
11
12 TB3
13 No Label Description
14 1Power H（＋） 85 to 264VAC
or 20 to 30VDC
2N（－）
3Ground
Screws on the terminal block: M3.5
Table 4.2 Terminal Connections
Output sync with
input signal (O.C.)
（＋）
（−）
（＋）
3-wire generator
Pt100Ω3-wire
4 to 20mADC/1 to 5VDC
2-wire generator

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5. GENERAL SPECIFICATIONS
Table 5.1
Item Description
Input
signals
Flow input
Signal name Pulse
generator Power to generator Speed of response
8V 2-wire current pulse OPTO 01, 02 8.5VDC 2kHz
Contact closure pulse PG20
13.5VDC Allowable
current
40mA app.
Shortcircuit
protection
circuit
provided
50Hz
2-wire, 12VDC 3-wire
Voltage pulse
PG30,
NPG60A (F)
2kHz
24VDC 2-wire
Current pulse (4/20mA)
PA14, 15, 25,
NPG60A (E)
24.0VDC
12VDC 2-wire Current pulse
PG30S
13.5VDC
Open collector pulse
FlowPet-5G,
NPG60A (E3)
Temperature input Resist. thermometer
Pt 100Ωat 0℃, 3-wire Rated system, current 2mA
Analog 4 to 20mADC or 1 to 5VDC
Output
signals
Pulse output
Uncorrected total flow Static relay Capacity: 230VAC/340VDC 0.2A
Pulse width: 1ms/50ms
Total flow corr. for
dens.
Output sync with flow
input signal Open collector pulse
Analog output Temperature output
4 to 20mADC (Max. load resistance 500Ω)
or 1 to 5VDC (Output impedance 250Ω)
Conversion accuracy: ±0.1% of F.S.
Display type Display: ST display (128×128 dots), backlighted (※1), (※2)
Information displayed: Data, units, error message simultaneously
Menu
items
Uncorr. total flow (Q)
Same as output pulse unit (l, etc.) Display capacity: 8 digits
Total flow corr. for
dens. (Q μf )
Total flow corr. for dens.
and temp. (Qμfρ)
Temperature To the 2nd decimal place (when ℃is selected.)
Set density (ρ) To the 3rd decimal place (when g/cm
3
is selected.)
Set viscosity (μ) To the1st decimal place (mPa・s is selected.)
Overall meter error To the 4th decimal place
Vol. conversion factor To the 4th decimal place (Field labeled measurement unit: Oil kind)
Correction factor E1To the 4th decimal place
Correction factor E2To the 4th decimal place
Frequency To the 4th decimal place
Error alarm
Number of occurring error＋error message
Correc-
tion
range
Density Crude oil: 0.6105 to 1.0750 Fuel oil: 0.6530 to 1.0750 Lube oil: 0.8000 to 1.1640
Temperature －10 to +118℃NOTE: Except the range not covered in JIS K 2249-1995.
Ref. temperature 15℃
Viscosity
0.4 to 199.9cP (mPa・s )
Com-
puting
accuracy
Total flow corr. for
viscosity and temp. ±0.075% or better
Temperature Pt 100Ωat 0℃ ±0.3% of span
4 to 20mADC or 1 to 5VDC ±0.1% of span
IC card
Type Key card
Capacity SRAM 32K
Battery backup Lithium battery (Battery life: 5 years approx.)
Clock IC battery backup Lithium battery (Battery life: 10 years approx.)
Communication Interface: RS485 Multipoint (Up to 16 units can be connected.)
Dedicated protocol Baud rate: 4800 bps standard 9600 bps max.
Transmission cable
Use 3-conductor shielded cable to the resistance thermometer bulb.
Loop resist. 5Ωmax. Example: 300 meters max. with 3-conductor 1.25mm2
cable; 500 meters with 2.0mm2cable
Power source 85 to 264VAC, 50/60Hz or 20 to 30VDC
Power consumption 20W max.
Ambient temperature －10 to ＋50°C
Mounting Panel mount
Finish Munsell N1.5
Weight 2.5 kilograms, approx.
NOTES (※1): ST display stands for Super Twisted Nematic display.
(※2): Backlight life (luminance declined to one half its original luminance) : 2500 hours, approx.

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6. INTERNAL COMPONENTS AND FUNCTIONS
6.1 Front Panel
6.1.1 Display
The display is a 128 ×128-dot multiple function display capable of showing the data, units of measure,
error messages, and other information at the same time. (The display is backlighted.)
6.1.2 On-Screen Menu Items
The units of measurement vary with configuration. Their selection is made in the SET mode. Available
menu items are:
(1) Uncorrected total flow (TOTAL COUNT(Q))
Incoming flow pulses corrected for viscosity are integrated before correction for temperature, and the
obtained totalized flow is indicated. Resolution, or the minimum unit of measurement, which varies
with customer specifications, is set up with front-panel keys. This unit automatically becomes identical
with the output pulse unit.
While the total flow is retained irrespective of power cycling, it is resettable to zero following a power
cycle if so configured in the SYS mode.
(2) Total flow corrected for viscosity (TOTAL COUNT (Qμf))
The reading corrected for viscosity is integrated and indicated.
(3) Total flow corrected for viscosity and temperature (TOTAL COUNT (Qμfρ))
The reading corrected for viscosity and temperature is integrated and indicated.
(4) Temperature (TEMPERATURE)
The temperature value currently fed to the instrument is indicated to the second decimal place. If a
problem arises in the course of temperature conversion, such as out-of-scale, a default fallback value
is indicated.
(5) Set density (SET DENSITY(ρ))
Density value set up in the SET mode is indicated.
(6) Set viscosity (SET VISCOSITY(μ))
Viscosity value set up in the SET mode is indicated.
(7) Overall error (OVERALL ERROR)
Correction factor to correct for viscosity and temperature is indicated.
[Overall error] = E1×E2
where E1 : Viscosity and flow velocity related meter error correction factor
E2 : Flowmeter body's volumetric expansion (3α) related meter error correction factor
(8) Volumetric conversion factor (VCF)
Volumetric conversion factor which is dependent on input temperature and set density is indicated.
The oil kind currently selected is indicated in the field labeled measurement unit.
(9) Flow velocity and viscosity related meter error correction factor (E1)
Meter error correction factor which are dependent on flow velocity and viscosity is indicated.
(10) 3αcorrection factor (E2)
Meter error correction factor which is dependent on flowmeter body's volumetric expansion (3α)
is indicated.
(11) Pulse input frequenc (FREQUENCY)
Pulse frequency arriving from the flowmeter is indicated.
NOTE: For more information about setup items and options, see "KEY OPERATION MANUAL".