Oval EL4121 User manual

This manual has been prepared to provide you with the information pertinent to the Temperature/
Pressure Compensated FLOW COMPUTER (Gas 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
Ins. No. E-882-4-E
Temperature/pressure compensated
FLOW COMPUTER (Gas service)
Model EL4121

E-882-4-E
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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. PRODUCT CODE EXPLANATION ................................................................................... 8
6. INTERNAL COMPONENTS AND FUNCTIONS............................................................. 9
6.1 Front Panel .......................................................................................................................... 9
6.1.1 Display ........................................................................................................................... 9
6.1.2 On-Screen Menu Items.................................................................................................. 9
6.1.3 Error Messages............................................................................................................. 10
6.1.4 Front Panel Keypad ....................................................................................................... 10
7. CALCULATION FORMULAS............................................................................................. 11
7.1 Implementation of Meter Error Correction (Total flow before correction)............................. 11
7.2 Implementation of Temperature/Pressure Correction (Corrected total flow)........................ 11
7.3 Instant Flowrate (Uncorrected) ............................................................................................ 11
7.4 Instant Flowrate (Corrected)................................................................................................ 11
8. PREPARATIONAL CHECKS AND OPERATION........................................................... 12
8.1 Preparation Before Operation.............................................................................................. 12
8.2 Preparational Checks .......................................................................................................... 12
8.3 Operation ............................................................................................................................. 12
9. TROUBLESHOOTING ......................................................................................................... 13
10. ERROR MESSAGES............................................................................................................ 14
11. BEHAVIOR IN ERRATIC CONDITIONS .......................................................................... 14
12. OVERALL BLOCK DIAGRAM ........................................................................................... 15
13. GENERAL SPECIFICATIONS ........................................................................................... 16

E-882-4-E
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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

E-882-4-E
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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 specifi-
cations 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 (page 16)
and the Product Code Explanation (page 8).
◆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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2. GENERAL
Using the most advanced electronic tehcnologies, this digital instrument has been developed specifically
to meet the most demanding gas flow measurement applications where accuracy is the prime
requirement.
In response to the gas flowrate, temperature, and pressure information arriving from the sensing terminal,
such as a flowmeter, it calculates gas flow, reduced to the equivalent volume flow under standard
conditions, and totalizes the flow.
In addition to meter error curve correction capabilities, a correction factor Χas a quadratic function of
temperature and pressure is introduced, giving you increased freedom to optimize compensated
calculation.
An analog output and instant flowrate (corrected for meter error and temperature) output are additional
provisions. With a model dedicated only to flow and pressure inputs, the instrument can also carry out
calculations as a pressure compensator with temperature value fixed.
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
MODEL EL4001
TB 1 TB 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
COMM 1
COMM 2
TEMP
PLS OUT2
1/1
OUT
DENSITY IN
Fig. 2.1 Part Names
Function Keys
Display
IC Card
Shift Keys
Seal Screw
Terminal Blocks

Min.120
Min.220
92 0.8
+1
138 0
600
1800
450
2200
Optimum Range
Acceptable Range
Computer
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3. INSTALLATION
3.1 Outline Dimensions
TB 1 TB 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
（
＋
）
PRESSIN
PLS OUT1
COMM 1
COMM 2
TEMP
PLS OUT2
1/1
OUT
DENSITY IN
MODEL
EL4001
912596
20
144 136
232.4
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, 1.25-2
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 identifica-
tion 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.
TB1 TB2
1 SUP.
Flow in
12 1 SUP.
Press. in
※１
8＋Pulse out 
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 ＋COMM1
※
7−
8＋19 −TB3
9−20 ＋COMM2
※
1 H（＋） Power
10 ＋Alarm out 21 −  N（−）
11 −3 GND
NOTE ※: Provided with communication interface. ※1: With direct coupled pressure transmitter, TB2-1, (+); TB2-2 (−).
Fig. 4.1 Terminal Blocks for Ext. Connections
Table 4.1 Terminal Identification and Functions
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
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.

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Table 4.2 Terminal Connections
TB1 TB2
No Label Description No Label Description
1
Flow in
SUP.
3-wire generator
（＋） 2-wire generator
（−）
（＋）
1
Press. in
SUP. ＋24VDC
4 to 20mADC/
1 to 5VDC
2 SIG. 2 ＋
3 0V 3 −
4 OUT 1/1 4 Analog out ＋Corrected instant flowrate
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＋4 to 20mADC/
1 to 5VDC
8Pulse out 2 No
Polarity
Corrected total flow
Static relay
9−9
10 Pulse out 3 No
polarity
Alarm out
Static relay
10
11 11
12
13
TB3
No Label Description
1Power H（＋） 85 to 264VAC
or 20 to 30VDC
2 N（−）
3 Ground
Screws on the terminal block: M3.5
Pt100Ω3-wire
5. PRODUCT CODE EXPLANATION
Table 5.1
Item Product Code Description
①②③④⑤⑥−⑦⑧⑨⑩⑪⑫
Model E L 4 1 2 1 Temperature/pressure compensated flow computer
Power 620 to 30VDC
Power consumption: 20W max.
785 to 264VAC, 50/60Hz
Temperature Input
0None (pressure correction only)
1Pt100Ωat ０℃
24 to 20mADC/1 to 5VDC
9Other than above (special)
Pressure Input
0None (temperature correction only)
14 to 20mADC/1 to 5VDC
9Other than above (special)
Output
1Uncorrected/corrected pulse
+ corrected analog output + alarm output
2Uncorrected/corrected pulse
+ uncorrected analog output + alarm output
9Other than above (special)
Communication Capability 0No
１Yes
Finish １Munsell N1.5
Output sync with
input signal (O.C.)

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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)
Incoming flow pulses are calibrated for meter error, integrated before correction for temperature and
pressure, and the obtained totalized flow is indicated. Resolution, or the minimum unit of measure-
ment, 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 corrected for temperature and pressure is integrated.
Other specifications remain the same as (1).
(3) Uncorrected instant flowrate (FLOW RATE)
The instant flowrate calibrated for meter error without temperature and pressure correction is indi-
cated.
(4) Corrected instant flowrate (FLOW RATE(C))
The instant flowrate calibrated for meter error and corrected for temperature and pressure is indi-
cated.
(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. With a model
dedicated to pressure only, a default fixed temperature value is indicated.
(6) Pressure (PRESSURE)
The pressure value currently fed to the instrument is indicated. If a problem arises in the course of
pressure conversion, such as out-of-scale, a default fallback value is indicated
(7) Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flowrate currently fed to the instrument is indi-
cated. Based on this reading, the total before correction is calibrated for meter error.
[Indicated reading] = 1 + −−−
(8) 3αcorrection factor (3αCOMPEN.)
Based on the temperature information currently fed to the instrument, the meter error correction factor
which is dependent on the volumetric expansion of meter body (3α) is indicated.
(9) Temperature/pressure correction factor (T/P COMPEN.)
The factor determined by the temperature and pressure currently fed to the instrument is indicated.
Based on this reading, correction of the corrected total is carried out.
[Indicated reading] =
(10) Quadratic correction factor (QUADRATIC COMPEN.)
Correction factor X of a quadratic function of temperature and pressure is indicated.
NOTE: For more information about menu items and options, see "KEY OPERATION MANUAL".
E
100
（−−− ）（−−− ）
×T0
T
P
P0

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6.1.3 Error Messages
When an erratic condition arises, an error message automatically appears on the display. (The informa-
tion represented by error messages are listed on page 14.)
If two or more concurrent errors are involved, individual messages will be scrolled at intervals of approxi-
mately 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.)
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 recon-
figuration.
・Shift keys: Four triangular keys
Used for moving the cursor, moving between menu items, or changing numerical values.
MODEL EL4001
RUN
Fig. 6.1 Front Panel Keys
Function Keys
Shift Keys
Fig. 6.2 Touch Key Operation