Oval EL4101 User manual

1
Ins. No. E-880-2N-E
This manual has been prepared to provide you with the information pertinent to the STEAM FLOW
COMPUTER (saturated steam 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.
STEAM FLOW COMPUTER
(Saturated steam service)
Model: EL4101

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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 Mass Conversion (total mass flow) ............................................................................................... 12
7.2 Calorific Value Conversion (total calorific flow) ............................................................................. 12
7.3 Instant Mass Flowrate ................................................................................................................... 12
8. PREPARATIONAL CHECKS AND OPERATION................................................................................. 13
8.1 Preparation Before Operation ....................................................................................................... 13
8.2 Preparational Checks.................................................................................................................... 13
8.3 Operation ...................................................................................................................................... 13
9. TROUBLESHOOTING ........................................................................................................................ 14
10. ERROR MESSAGES .......................................................................................................................... 15
11. BEHAVIOR IN ERRATIC CONDITIONS.............................................................................................. 15
12. OVERALL BLOCK DIAGRAM ............................................................................................................. 16
13. PRODUCT CODE EXPLANATION ..................................................................................................... 17
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 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 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 steam flow measurement applications where accuracy is the prime
requirement. In response to flowrate and temperature information arriving from the sensing terminal, such
as a delta flowmeter, it calculates "dryness factor of 1" saturated steam flow, transforms it to mass and
calorific quantities, and totalizes the flow. It also provides a totalizer pulse output and an instant flowrate
analog output (mass equivalent).
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
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
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
Min.120
Min.220
92 ±0.8
0
+1
138 0

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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 instru-
ment 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 16 5 －12
6 17 6 ＋Pulse out 1 13
7 18 ＋Comm1
※
7－
8 19 －TB3
9 20 ＋Comm2
※
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 : ※Mode provided with communication interface.

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TB1 TB2
No Label Description No Label Description
1
Flow in
SUP. 
（＋）
（−）
（＋）
1
Press. in
SUP. ＋24VDC
2 SIG. 2 ＋
3 0V 3 －
4 OUT 1/1 4 Analog out ＋Instant mass flowrate
4 to 20mADC/1 to 5VDC
5 5 －
6 6 Pulse out 1 No
Polarity
Total mass flow
Static relay
7 7
8 8 Pulse out 2 No
Polarity
Total calorific 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（－）
3Ground
Screws on the terminal block: M3.5
Table 4.2 Terminal Connections
Output sync with
input signal (O.C.)
3-wire generator
2-wire generator
NOTE : ※Mode provided with communication interface.
4 to 20mADC/
1 to 5VDC

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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
Contact closure pulse －13.5VDC Allowable
current
40mA app.
Shortcircuit
protection
circuit
provided
50Hz
2-wire, 12VDC 3-wire
Voltage pulse －13.5VDC
2kHz
24VDC 2-wire
Current pulse (4/20mA) PA15, 25 24.0VDC
Open collector pulse －13.5VDC
Pressure input 4 to 20mADC or 1 to 5VDC
Output
signals
Pulse output
Total mass flow Static relay Capacity: 230VAC/340VDC 0.2A
Pulse width: 1ms/50ms
Total calorific flow
Output sync with flow
input signal Open collector pulse
Alarm output Static relay Capacity: 230VAC/340VDC 0.2A
Analog output Instant mass flowrate
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
Total mass flow Same as output pulse unit (kg, for example) Display capacity: 8 digits
Total calorific flow Same as output pulse unit (Mcal, for example)
Instant mass flowrate (kg/h, for example)
Pressure To the 4th decimal place (when MPa is selected.)
Correction factor 1 To the 5th decimal place
Correction factor 2 To the 4th decimal place
Meter error corr. fctr. To the 5th decimal place
Meter correction fctr. To the 5th decimal place
Specific weight To the 4th decimal place (when kg/m3is selected.)
Specific enthalpy To the 2nd decimal place (when kJ/kg is selected.)
Error alarm Number of errors + error messages
Comput-
ing range
Pressure 0 to 3MPa Standard span: 1MPa
Com-
puting
accu-
racy
Mass flow ±0.5% of R.D.
Calorific flow ±0.6% of R.D.
Pressure ±0.1% of SPAN
Clock IC battery backup Lithium battery (Battery life: 10 years approx.)
Communication (when com.
interface is provided.)
Interface: RS485 Multipoint (Up to 16 units can be connected.)
Dedicated protocol Baud rate: 4800 bps standard 9600 bps max.
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 h.

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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) Total mass flow (TOTAL COUNT1)
Incoming flow pulses are calculated to read in mass units, integrated, and the obtained totalized mass
flow is indicated on the display. 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 mass flow is retained in a nonvolatile memory (E2PROM) irrespective of power cycling,
it is resettable to zero following a power cycle if so configured in the SYS mode.
(2) Total calorific flow (TOTAL COUNT2)
Total flow after conversion to calorific units is indicated on the display. Other specifications remain the
same as (1).
(3) Instant mass flowrate (FLOW RATE)
Instant flowrate (hourly) after conversion to weight units is indicated on the display. Resolution, or the
minimum unit of measurement, varies with customer specifications.
(4) 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.
(5) Correction factor 1 (COMP. FACTOR1)
The value determined by correction factors and the relative density is indicated.
Correction factor 1 = Meter error correction factor ×Meter correction factor ×Relative density
(6) Correction factor 2 (COMP. FACTOR2)
The value determined by correction factors, the relative density, and specific enthalpy is indicated.
Correction factor 2 = Meter error correction factor ×Meter correction factor ×Relative density ×
Specific enthalpy
(7) Meter error correction factor (METER ERROR)
Meter error correction factor corresponding to the flow rate currently fed to the instrument is indicated.
(8) Meter correction factor (Et)
Based on the temperature information currently fed to the instrument, the meter error correction factor
dependent on the volumetric expansion of meter body (3α) is indicated.
(9) Relative density (specific weight) (SPEC. WEIGHT (SAT))
The relative density determined by the temperature and pressure values currently fed to the
instrument is indicated. If a problem arises in the temperature and pressure inputs, it is calculated
based on their default fallback values.
(10) Specific enthalpy (SPEC. ENTHALPY (SAT))
Similar to obtaining the relative density, the value determined by temperature and pressure is indicated.
Calorific conversion is carried out based on this reading in indicated unit and the reading in (6).
Specific calorific value = Relative density×Specific enthalpy
NOTE: For more information about setup items and options, see "KEY OPERATION MANUAL".