This manual has been prepared to provide you with the information pertinent to the Temperature/
Pressure Compensated FLOW COMPUTER (Liquid service).
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.
1
E--883--4N--E
TABLE OF CONTENTS
1. BEFORE YOU BEGIN ............................................................................................................ 4
1.1 Confirming the Nameplate ..................................................................................................... 4
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
Nameplate (model number)
※
※ EL001 is the
generic designation of the
EL001 series
computers.
Fig. 1.1 Nameplate Location
(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.)
E--883--4N--E
MODEL EL4001
TB
1
TB
2
TB
1
TB
2
TB
3
PLS OUT3 TEMP IN TEMP INFLOW 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 liquid flow measurement applications 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) Changing the meter factor, ranges of temperature, pressure, 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.
(2) Built around a microprocessor, the instrument carries out calculations entirely in digital signal
processing circuits to achieve a high degree of accuracy and reliability.
(3) Variables, such as temperature and pressure, can be reviewed on command with the front panel
keypad, whether or not calculation is in progress.
(4) 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
Function Keys
Shift Keys
Seal Screw
IC Card
Display
Fig. 2.1 Part Names
Terminal Blocks
E--883--4N--E
TB
1
TB
2
TB
1
TB
2
TB
3
PLS OUT3 TEMP IN TEMP INFLOW IN
0V
+−
B bA
+−
+−+−+−
+−
SIG SUP
SUP
PLS OUT2GND POWER
N
(
−
)
H
(
+
)
PRESS INANA
PLS OUT1
1/1
OUT
MODEL EL4001
912596
20232.4
144
136
Min.120
Min.220
92
±0.8
+1
138 0
Optimum
Range
600
1800
450 Acceptable Range
2200
Computer
3. INSTALLATION
3.1 Outline Dimensions
All dimensions in millimeters
Hold-down Fitting
Fig. 3.1 Outline Dimensions
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
1.6mm. 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.
Fig. 3.2 Panel Cut
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. 3.3 Instrument Mounting Height
E--883--4N--E
TB 1
TB 2
1
2
3
TB 3
PLS OUT3 TEMP INTEMP INFLOW IN
0V
+−
BbA
+−
+−−+−
+−+−+−
+−
SIG SUP
0V SIG SUP
SUP
ANA OUT
GNDPOWER
N(−) H(+)
PRESS INPLS OUT1
COMM1
COMM2
TEMP
PLS OUT2
1/1
OUT
DENSITY IN
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, 1.25-2
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.
CAUTION
Make wiring connections upon confirmation of the validity of flowmeter (pulse
generator) to receiving instrument combination by their product code number,
instrument number, etc.
Fig. 4.1 Terminal Blocks for Ext. Connections
1SUP.
2SIG.1329−
30V14310
4 OUT 1/1154+
5b
Flow in
6B176+
7A18+
8+19−TB3
9−20+
10+
11−3GND
NOTE ※: Provided with communication interface.
Temp. in
Alarm out
Table 4.1 Terminal Identification and Functions
TB1TB2
121
8+
Press. in
165−12
COMM1
7−
Analog out
Pulse out 1
11
13
※
COMM2
21−2N(−)
※
1H(+)
Terminal
Screws
(M.)
Pulse out 2
Power
E--883--4N--E
Table 4.2 Terminal Connections
TB1
No LabelDescription
1
SIG.
Flow in
0V
OUT 1/1
B
Temp. in
A
+
9−
10
Pulse out
11
Screws on the terminal block: M.
SUP.
b
No
polarity
(+) -wire generator
(−) Output sync with
(+) input signal (O.C.)
Alarm out
Static relay
-wire generator
Pt100Ω -wire
to 0mADC/1 to VDC
No LabelDescription
1
2
3
4
Analog out
5−
6
Pulse out 1
7
8
Pulse out 2
9
10
11
12
13
No LabelDescription
1
Power
2N(−)
3Ground
+
No
Polarity
No
polarity
H(+)
TB2
Uncorr. or corr. instant flowrate
4 to 20mADC/1 to 5VDC
Uncorrected total flow
Static relay
Corrected total flow
Static relay
TB3
85 to 264VAC
or 20 to 30VDC
5. GENERAL SPECIFICATIONS
Table 5.1
ItemDescription
Signal name
8V 2-wire current pulseOPTO 01, 028.5VDC
Contact closure pulsePG20
2-wire, 12VDC 3-wire
Input
signals
Output
signals
Display type
Menu
items
Computing
range
Computing
accuracy
Clock IC battery backupLithium battery (Battery life: 10 years approx.)
4 to 20mADC (Max. load resistance 500Ω)
or 1 to 5VDC (Output impedance 250Ω)
Conversion accuracy: ±0.1% of F.S.
Range:−50 to 350°C
±0.1% of span
Power to generator
13.5VDC
24.0VDC
13.5VDC
Allowable
current
40mA app.
Shortcircuit
protection
circuit
provided
Display capacity: 8 digits
Std. Span: 70℃
Std. Span:200℃
E--883--4N--E
Speed of
response
2kHz
50Hz
2kHz
NOTES (※1): ST display stands for Super Twisted Nematic display.
(※2): Backlight life (luminance declined to one half of its original luminance): 2500 hours, approx.
9
E--883--4N--E
6. INTERNAL COMPONENTS AND FUNCTIONS
6.1 Front Panel
6.1.1 Display
The display is a 128 X 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)
Incoming flow pulses are calibrated for meter error, 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) Corrected total flow (TOTAL COUNT(C))
The reading calibrated for meter error and temperature is integrated. Other specifications remain
the same as (1).
(3) Uncorrected instant flowrate (FLOW RATE)
The instant flowrate calibrated for meter error is indicated before temperature correction.
(4) Corrected Instant flowrate (FLOW RATE(C))
The instant flowrate calibrated for meter error and corrected for temperature is indicated.
(5) Temperature (TEMPERATURE)
The temperature value currently fed to the instrument is indicated. If a problem arises in the course
of temperature conversion, such as out-of-scale, a default fallback value is indicated.
(6) Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flowrate currently fed to the instrument is
indicated.
Based on this reading, the total before correction is calibrated for meter error.
[Indicated reading] = 1 + −−−
(7) Temperature correction factor (TEMP. COMPEN.)
The temperature correction factor calculated based on the temperature currently fed to the
instrument is indicated. The corrected total flow is compensated based on this reading.
(See Section 7.2 "Implementation of Temperature Correction".)
E
100
NOTE: For more information about menu items and options, see "KEY OPERATION MANUAL".
6.1.3 Error Messages
When an erratic condition arises, an error message automatically appears on the display. (The
information represented by error messages are listed on page 15.)
If two or more concurrent errors are involved, individual messages will be scrolled at intervals of
approximately 3 seconds. When an error condition disappears, an error message automatically goes out
and the normal display is resumed.
NOTE: An error logging function can store a maximum of 20 events each of which consists of year,
month, day, hour and minutes of error occurrence and recovery. (Complete details are
covered in the Key Operation Manual.)
10
E--883--4N--E
MO DE L
EL4001
RUN
6.1.4 Front Panel Keypad
The eight front panel key switches consist of two kinds of keys - functions keys and shift keys.
・Function keys: Four round keys
Mainly used for function selection, such as activating the input conditions selected and reconfiguration.
・Shift keys: Four triangular keys
Used for moving the cursor, moving between menu items, or changing numerical values.
Function Keys
Shift Keys
Fig. 6.1 Front Panel Keys
Fig. 6.2 Touch Key Operation
11
E--883--4N--E
+
0
−
F
1
F
2
F
3
E
1
E
2
E
3
E
4
F
4
F
8
E
8
E
F
9
}
9
7. CALCULATION FORMULAS
7.1 Implementation of Meter Error Correction (Total flow before correction)
Q1 = a×Ip×(1 + E/100)
where Q1: Total flow corrected for meter error[l]
a: Meter factor[l/P]
Ip: Number of input pulses
E: Meter error correction value[%]
The line graph in Fig. 7.1 below shows how meter error curve linearization is achieved. E is
approximate-ly determined by the relationships between input pulse frequency and instrumental
error correction value set at multipoint error points which are programmable along the flowmeter's
instrumental error curve with front-panel keys, and the frequency pulse information (flowrate)
Flowrate
(frequency)
Meter error
F1 thru F9 Frequency (Hz)
E1 thru E9 Meter error correction value (%)
Programmable with keys
Fig. 7.1
7.2 Implementation of Temperature Correction (Corrected total flow)
Q2 = Q1×K
K = {a + b・(t0−t) + c・(t0−t)2}
where Q2: Total flow corrected for temperature[l (normal)]
Q1: Total flow calibrated for meter error[l]
K: Temperature correction factor
t0: Reference temperature[°C]
t: Line temperature[°C]
a thru c: Correction factors
7.3 Instant Flowrate (Uncorrected)
Qm = a×f×(1 + E/100)×3600
where Qm: Instant flowrate corrected for meter error[l/h]
f: Input pulse frequency[Hz]
7.4 Instant Flowrate (Corrected)
where Qmc: Instant flowrate corrected for temperature[l/h (normal)]
1
Qmc = Qm×K
E--883--4N--E
8. PREPARATIONAL CHECKS AND OPERATION
8.1 Preparation Before Operation
(1) Ensure that the instrument and related equipment are correctly installed and wired with no place left
unfinished.
WARNING: Make sure to see that the power terminals are connected to a power
source of the rated voltage. Applying a power source of incorrect voltage
could ruin your instrument.
(2) Supply power to this instrument and make certain to see that the front panel display is illuminated.
The display will remain unilluminated for one second after power on, which however is by no means
any indication of fault.
8.2 Preparational Checks
CAUTION: Allow a warmup period for 60 minutes or so after you turn on the power.
Verify if the instrument operates with no fluid flow.
How to Check
(1) Couple sources of simulated temperature and pressure signals.
(2) Using the shift keys, select menu items and verify the information displayed.
NOTE: See the KEY OPERATION MANUAL.
(3) Inject a simulated input pulse train or density signal representing the type of the companion pulse
generator.
(4) Select display menu items of the total mass flow and total calorific flow, and make sure that incoming
pulses are being accumulated. Also, verify that pulse output and analog output are properly
generated.
(5) Remove the simulated pulse input and compare the obtained readings on the display with cor-
responding theoretical values. Remember that this instrument is not equipped with a counter to
accumulate incoming pulses. Hence, an external counter is required.
8.3 Operation
CAUTION: Allow a warmup period for 60 minutes or so after you turn on the power.
(1) Select your power reset or non-reset (accumulated total) option.
NOTE: See the KEY OPERATION MANUAL.
(2) Turn on power. While the initial check screen remains displayed, indicating that the process of verify-
ing parameters and variables is in progress after you turned on the power, your instrument will not
accept any pulse input.
(3) Place your instrument in service operation by allowing the fluid to be metered.
1
E--883--4N--E
9. TROUBLESHOOTING
Reminder: If internal trouble is suspected, seek our service at the nearest sales office or
customer service representative in your area.
Table 9.1
SymptomCheckPossible Causes
Display is dead.1. Inspect fuse.
2. Make sure of power source voltage.
Faulty temperature indication.
Erratic reading
Error messages
TEMP 1 (PT) OVER
or TEMP 1 (PT) UNDER
or TEMP 1 (ANA) OVER
or TEMP 1 (ANA) UNDER
(Same also with TEMP 1.)
Faulty indication of meter error
correction factor and/or temperature
correction factor.
While
fluid
is
allowed
to flow.
Error messages
A/D CONVERT ERROR
or DENSITY CONVERT ERROR
or 4mA SCALER 1 UNDER
(Same also with SCALER 2.)
Error messages
DENSITY SIGNAL
or DENSITY OVER
or DENSITY UNDER
or 20mA SCALE OVER
Fails to count pulses;
fails to produce a pulse
output.
Faulty total counter
reading.
1. Input signal line correctly wired?
2. Input signal specifications
matched?
3. System configured correctly?
4. Temperature range set correctly?
1. Temperature reading correct?1. A fault in internal assembly.
1. Input signal line correctly wired?
2. Pulse signal coming in?
3. Pulse generator specifications
matched?
1. Temperature reading correct?
2. Meter error and temperature
correction factor indications correct?
1. System configured correctly?
2. Input pulse signal correct?
3. Flowrate full scale set properly?
1. Fuse is blown.
2. Line voltage is improper.
3. A fault in internal assembly.
1. Input wiring is incorrect.
2.Thermometer resistance bulb is
open or shorted.
3. Temperature converter is faulty.
4. A fault in internal assembly.
1. Incorrect input wiring.
2. Pulse generator itself is faulty.
3. A fault in internal assembly.
1. Pulse generator itself is faulty.
2. A fault in internal assembly.
1. A fault in internal assembly.
1. A fault in internal assembly.
CAUTION: Once any printed circuit board(s) of the internal assembly has been
removed for servicing, do not fail to reestablish all parameters in the SET
mode.
1
10. ERROR MESSAGES
Table 10.1 List of Error Messages
No.Error MessageDescription
1ADJUST DATA ERRORAfter adjusted, error of allowable range check
18TEMP 1 (ANA) OVERAnalog temperature input 1 overflow
19TEMP 1 (ANA) UNDERAnalog temperature input 1 underflow
20TEMP 2 (ANA) OVERAnalog temperature input 2 overflow
21TEMP 2 (ANA) UNDERAnalog temperature input 2 underflow
26DENSITY OVERDensity input overflow (unused)
E--883--4N--E
27DENSITY UNDERDensity input underflow (unused)
284mA SCALER 1 UNDERAnalog output 1 underflow
2920mA SCALER 1 OVERAnalog output 1 overflow
304mA SCALER 2 UNDERAnalog output 2 underflow
3120mA SCALER 2 OVERAnalog output 2 overflow
NOTE: Depending on the model in service, some of the messages are not shown.
11. BEHAVIOR IN ERRATIC CONDITIONS
(1) Erratic A/D Converter:
If, following energization of A/D converter circuit, the conversion process is not completed within
the specified time period, it is found that the circuit has a problem. At this point, temperature and
pressure fallback values are used for calculation.
(2) Temperature and Pressure Input Out of Range:
If the input exceeds the high limit or falls below the low limit, its default fallback value is used for
calculation.
(3) Analog Output Overflow:
A full scale output is produced across the analog output terminals.
1
E--883--4N--E
Power
Flow input
1/1 output
Density input
Press. input
Temp. input
Analog output
Pulse output 1
Pulse output 2
Pulse output 3
Com port
Terminal
Block
Address path
Data path
Power Board
Interface Board
Communication Board
CPU Board
I/O Board
Power Unit
Internal
Power
low Input Ckt.
Dens. Input Ckt.
A/D
Converter
Press. Input Ckt. (analog)
Temp. Input Ckt. (analog)
Temp. Input Ckt. (Pt)
Analog Output Circuit
Pulse Output Circuit 1
Pulse Output Circuit 2
Pulse Output Circuit 3
Multi
plexer
Isolation
Test Pins
Test Pins
Internal
Volt.
Buzzer
Motherboard
Keyboard
IC Card
128×128 dots
ST Display
RUN
×8 keys
Isolation
Isolation
Isolation
Isolation
Parallel I/O
Timer Counter
Parallel I/O
CPU
20MHz
Memory
RS485
Isolation
IC Card
Interface
Circuit
32.768kHz
Real Time
Clock
Lithium
Battery
Power Detect
Fuse
Isolation
12. OVERALL BLOCK DIAGRAM
Fig. 12.1Overall Block Diagram
1
⑧−⑥⑤④③②①⑯⑮−⑬⑫⑪⑩⑨⑰㉒㉑⑳㉓ ㉔ ㉕ ㉖ ㉗ − ㉙⑲⑱
Model
Power supply
Input pulse signal
Temp. input
Pressure input
Density input
Version code
Communication function
Analog output hard
Output item 4
Output item 3 affix code
Output item 3
Output item 2 affix code
Output item 2
Characteristic
Output item 1
Output item 1 affix code
Others
Main code
/ / / Additional code
13. PRODUCT CODE EXPLANATION
●
Main code
① ② ③ ④ ⑤ ⑥
E L 4 1 3 1 Flow computer for liquid temp. correction
—
⑦
Power supply
⑧
D 20 to 30VDC
J 85 to 264VAC 50Hz/60Hz
Input pulse signal
⑨
B Voltage pulse 12VDC 2 wires/3 wires
C Voltage pulse 12VDC (PG30S)
D Current pulse 24VDC (4/20mADC)
E Current pulse 8VDC (OPTO OD 01, etc.)
G Open collector pulse 12VDC 2 wires/3 wires
K Contact pulse 12VDC 2 wires/3 wires
Z Special
Temp. input
⑩
N Non
B 1 to 5V
E 4 to 20mA
F Pt100Ω
G JPt100Ω
Z Special
Pressure input
⑪
N Non
Density input
⑫
N Non
Others
⑬
N Non
—
⑭
Output item 1
⑮ ⑯
Pulse output 1
B 1 Before correction/pulse width 1ms
B 5 Before correction/pulse width 50ms
B 9 Before correction/special pulse width
C 1 After correction/pulse width 1ms
C 5 After correction/pulse width 50ms
C 9 After correction/special pulse width
A L Alarm output
Z Z Special
Output item 1 affix code
⑰
N Non
Output item 2
⑱ ⑲
Pulse output 2
B 1 Before correction/pulse width 1ms
B 5 Before correction/pulse width 50ms
B 9 Before correction/special pulse width
C 1 After correction/pulse width 1ms
C 5 After correction/pulse width 50ms
C 9 After correction/special pulse width
A L Alarm output
Z Z Special
Output item 2 affix code
⑳
N Non
Model
Pulse output 3
A L Alarm output
Z Z Special
Output item 3 affix code
N Non
Output item 4
Analog output assignment
N Non
B Before correction instantaneous analog output
C After correction instantaneous analog output
Z Special
Analog output hard
N Non
2 1 to 5V
5 4 to 20mA
Z Special
Communication function
N Non
R RS-485
Version code
A Version code: A
—
Characteristic
0 Standard
Z Special
E--883--4N--E
Output item 3
1
E--883--4N--E
Output item 1 affix code
Output item 1
Others
Density input
Pressure input
Temp. input
Input pulse signal
Power supply
Model
⑧−⑥⑤④③②①⑯⑮−⑬⑫⑪⑩⑨⑰㉒㉑⑳㉓ ㉔ ㉕ ㉖ ㉗ − ㉙⑲⑱
●
Additional code
Special test
A 1 0 Taxed custody transfer
A 2 0 By certified measurer
A 3 0 Taxed alcohol
Document
D S J DWG and specifications for approval (Japanese)
D S E DWG and specifications for approval (English)
D R 0 Re-submission of DWG with specifications
D C J Final DWG (Japanese)
D C E Final DWG (English)
D W J Wiring diagram (Japanese)
D W E Wiring diagram (English)
D A J Compression coefficient calculation process (Japanese)
D A E Compression coefficient calculation process (English)
D T J Inspection procedure (Japanese)
D T E Inspection procedure (English)
C B J Inspection certificate: B setOnly Japanese
Witnessed by customer
V 1 0 Required
Output item 2
Output item 2 affix code
Output item 3
Output item 3 affix code
Output item 4
Analog output hard
Communication function
Version code
Characteristic
/ / / Additional code
Main code
All specifications are subject to change without notice for improvement.
2018.01 Revised
2008.08 Released
E-883-4N-E (1)
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.