Page 1
Ins. No.
STEAM FLOW COMPUTER
(Saturated steam service)
Model: EL4101
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.
1
Page 2
E-880-2N-E
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:
2
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.
Page 3
E-880-2N-E
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
3
Page 4
E-880-2N-E
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
※
Nameplate
(model number)
※ EL4001 is the
generic designation of the
EL4001 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.)
4
Page 5
E-880-2N-E
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
Function Keys
Display
Shift Keys
Seal Screw
IC Card
Terminal Blocks
Fig. 2.1 Part Names
5
Page 6
E-880-2N-E
912596
20 232.4
144
136
600
1800
450
2200
Optimum
Range
AcceptableRange
Computer
Min.120
Min.220
92
±0.8
0
+1
138 0
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
1.6 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.
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).
6
Fig. 3.3 Instrument Mounting Height
Page 7
E-880-2N-E
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
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 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.
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
Table 4.1 Terminal Identification and Functions
Terminal
Screws
(M3.5)
1 SUP.
2 SIG. 13 2 ＋ 9 －
3 0V 14 3 － 10
4 OUT 1/1 15 4 ＋
5 16 5 － 12
6 17 6 ＋
7 18 ＋
8 19 － TB3
9 20 ＋
10 ＋
11 － 3 GND
NOTE : ※ Mode provided with communication interface.
Flow in
Alarm out
TB1 TB2
12 1 SUP.
8 ＋
Press. in
11
13
Comm1
7 －
Analog out
Pulse out 1
※
Comm2
21 － 2 N（－）
※
1 H（＋）
Pulse out 2
Power
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Page 8
E-880-2N-E
Table 4.2 Terminal Connections
TB1 TB2
No
1
2 SIG. 2 ＋
3 0V 3 －
4 OUT 1/1 4
5 5 －
6 6
7 7
8 8
9 9
10
Pulse out 3
11
Label Description
SUP.
Flow in
polarity
No
（＋）
（−）
（＋）
Alarm out
Static relay
3-wire generator
2-wire generator
Output sync with
input signal (O.C.)
NOTE : ※ Mode provided with communication interface.
Screws on the terminal block: M3.5
No
1
Label Description
SUP.
Press. in
Analog out
Pulse out 1
Pulse out 2
10
11
12
13
No
1
2 N（－）
3
Label Description
Power
Ground
＋
No
Polarity
No
Polarity
H（＋）
＋24VDC
TB3
4 to 20mADC/
1 to 5VDC
Instant mass flowrate
4 to 20mADC/1 to 5VDC
Total mass flow
Static relay
Total calorific flow
Static relay
85 to 264VAC
or 20 to 30VDC
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Page 9
5. GENERAL SPECIFICATIONS
Table 5.1
Item Description
Signal name
Contact closure pulse － 13.5VDC
Input
signals
Output
signals
Display type
Menu
items
Computing range
Computing
accuracy
Clock IC battery backup Lithium battery (Battery life: 10 years approx.)
Communication (when com.
interface is provided.)
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.
Flow input
Pressure input 4 to 20mADC or 1 to 5VDC
Pulse output
Alarm output Static relay Capacity: 230VAC/340VDC 0.2A
Analog output Instant mass flowrate
Total mass flow Same as output pulse unit (kg, for example)
Total calorific flow Same as output pulse unit (Mcal, for example)
Instant mass flowrate
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/m3 is selected.)
Specific enthalpy To the 2nd decimal place (when kJ/kg is selected.)
Error alarm Number of errors + error messages
Pressure 0 to 3MPa Standard span: 1MPa
Mass flow ±0.5% of R.D.
Calorific flow ±0.6% of R.D.
Pressure ±0.1% of SPAN
2-wire, 12VDC 3-wire
Voltage pulse
24VDC 2-wire
Current pulse (4/20mA)
Open collector pulse － 13.5VDC
Total mass flow
Total calorific flow
Output sync with flow
input signal
Display: ST display (128×128 dots), backlighted (※1), (※2)
Information displayed: Data, units, error message simultaneously
(kg/h, for example)
Interface: RS485 Multipoint (Up to 16 units can be connected.)
Dedicated protocol Baud rate: 4800 bps standard 9600 bps max.
Static relay Capacity: 230VAC/340VDC 0.2A
Pulse width: 1ms/50ms
Open collector pulse
4 to 20mADC (Max. load resistance 500Ω)
or 1 to 5VDC (Output impedance 250Ω)
Conversion accuracy: ±0.1% of F.S.
Pulse
generator
－ 13.5VDC
PA15, 25 24.0VDC
E-880-2N-E
Power to generator
Allowable
current
40mA app.
Shortcircuit
protection
circuit
provided
Display capacity: 8 digits
Speed of
response
50Hz
2kHz
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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E-880-2N-E
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".
10
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E-880-2N-E
MO DE L
EL4001
RUN
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.)
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
Ma inly used for function selection, such as activating the in put conditions selected and
reconfiguration.
・Shift keys: Four triangular keys
Used for moving the cursor, moving between menu items, or changing numerical values.
Shift Keys
Function Keys
Fig. 6.1 Front Panel Keys
Fig. 6.2 Touch Key Operation
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E-880-2N-E
7. CALCULATION FORMULAS
7.1 Conversion to Mass Units (Total mass flow)
In saturated steam calculation, the temperature and pressure fed to the instrument are used in our
proprietary formula of approximation to determine specific weight V", from which conversion is performed
with respect to the flow input.
W = a × Ip×V"×εt ×εp ×〔1＋
where W：Mass［g］
a：Meter factor of the flowmeter ［l/P］
Ip：Input pulse
V"：Relative density ［kg/m3 = g/l］
εt：Meter's correction factor relative to temperature variation
εt = 1＋3α（t－20）
t = Operating temperature ［℃］
3α= 4.8×10－5 (stainless steel)
εp：Meter's correction factor relative to pressure variation
(ε
p = always "1".)
E：Meter error correction of the flowmeter ［%］
E
100
〕
7.2 Conversion to Calorific Value (Total calorific flow)
Similar to obtaining the specific weight above, specific enthalpy h is determined and, based on mass
conversion value W, calorific conversion is performed.
Q＝W × h
where Q： Calorific value ［J］
h： Specific enthalpy ［kJ/kg］
7.3 Instant Mass Flowrate
］
E
100
×3600
〕
Wm＝a × f × V"×εt ×εp×〔1＋
where Wm：Instant mass flow ［g/h
f： Input pulse frequency ［P/s
］
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E-880-2N-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.
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
corresponding 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.
See the KEY OPERATION MANUAL.
(2) Turn on power. While the initial check screen remains displayed, indicating that the process of
verifying 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.
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E-880-2N-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
Symptom Check Possible Causes
Display is dead. 1. Inspect fuse.
2. Make sure of power source voltage.
Faulty pressure indication.
Error messages
PRESS 1 OVER
or PRESS 1 UNDER
(Same also with PRESS 2.)
Faulty relative density and/or specific
enthalpy reading.
Fails to count pulses;
fails to produce a pulse
While
steam is
allowed
to flow.
Error messages
A/D CONVERT ERROR
or 4mA SCALER 1 UNDER
(Same also with SCALER 2.)
or 20mA SCALER 1 OVER
(Same also with SCALER 2.)
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 and pressure readings
correct?
1. Input signal line correctly wired?
2. Pulse signal coming in?
3. Pulse generator specifications
matched?
1. Temperature and pressure readings
correct?
2. Specific weight and specific enthalpy
readings 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 faulty.
2. Pressure transmitter is faulty.
3. A fault in internal assembly.
1. 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.
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.
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Page 15
10. ERROR MESSAGES
Table 10.1 List of Error Messages
No. Error Message Description
1 ADJUST DATA ERROR Adjusted allowable range check error
12 A/D CONVERT ERROR A/D converter circuit error
13 DENSITY CONVERT ERROR Density converter circuit error
14 TEMP 1. (PT) OVER Temperature Pt input 1 overflow
15 TENP 1. (PT) UNDER Temperature Pt input 1 underflow
16 TEMP 2. (PT) OVER Temperature Pt input 2 overflow
17 TEMP 2. (PT) UNDER Temperature Pt input 2 underflow
18 TEMP 1. (ANA) OVER Analog temperature input 1 overflow
19 TEMP 1. (ANA) UNDER Analog temperature input 1 underflow
20 TEMP 2. (ANA) OVER Analog temperature input 2 overflow
21 TEMP 2. (ANA) UNDER Analog temperature input 2 underflow
22 PRESS 1. OVER Analog pressure input 1 overflow
E-880-2N-E
23 PRESS 1. UNDER Analog pressure input 1 underflow
24 PRESS 2. OVER Analog pressure input 2 overflow
25 PRESS 2. UNDER Analog pressure input 2 underflow
26 DENSITY OVER Density input overflow (unused)
27 DENSITY UNDER Density input underflow (unused)
28 4mA SCALER 1 UNDER Analog output 1 underflow
29 20mA SCALER 1 OVER Analog output 1 overflow
30 4mA SCALER 2 UNDER Analog output 2 underflow
31 20mA SCALER 2 OVER Analog 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.
15
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E-880-2N-E
Power
Flowinput
1/1output
Densityinput
Press.input
Temp.input
Analogoutput
Pulseoutput1
Pulseoutput2
Pulseoutput3
Comport
Terminal
Block
Addresspath
Datapath
PowerBoard
InterfaceBoardCommunicationBoard
CPUBoard
I/OBoard
PowerUnit
Internal
Power
FlowInputCkt.
Dens.InputCkt.
A/D
Converter
Press.InputCkt.(analog)
Temp.InputCkt.(analog)
Temp.InputCkt.(Pt)
AnalogOutputCircuit
PulseOutputCircuit1
PulseOutputCircuit2
PulseOutputCircuit3
Multi
plexer
Isolation
TestPins
TestPins
Internal
Volt.
Buzzer
Motherboard
Keyboard
ICCard
128×128dots
STDisplay
RUN
×8keys
Isolation
Isolation
Isolation
Isolation
ParallelI/O
TimerCounter
ParallelI/O
CPU
20MHz
Memory
RS485
Isolation
ICCard
Interface
Circuit
32.768kHz
RealTime
Clock
Lithium
Battery
Isolation
PowerDetect
Fuse
12. OVERALL BLOCK DIAGRAM
Fig. 12.1 Overall Block Diagram
16
Page 17
13. PRODUCT CODE EXPLANATION
STEAM FLOW COMPUTER (
Saturated steam service)
6N-E023JEG1014LE
@ PRODUCT CODE EXPLANATION
5
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Model：①～③
①②③④⑤⑥-******-*************-*
Output item 2：⑱⑲
******-******-***⑱⑲********-*
E L 4 1 0 1 Steam flow computer Pulse output 2
Hyphen：⑦
******-******-*************-*
M 1 Total mass flow/pulse width 1ms
Power su pply：⑧
******-⑧*****-*************-*
M 5 Total mass flow/pulse width 50ms
D 20～30VDC M 9 Total mass flow/pulse width special
J 85～264VAC 50/60Hz H 1 Total calorie flow/pulse width 1ms
Input pulse signal：⑨
******-*⑨****-*************-*
H 5 Total calorie flow/pulse width 50ms
B Voltage pulse 12VDC 2 wires / 3 wires H 9 Total calorie flow/pulse width special
D Current pulse 24VDC (4/20mADC) A L Alarm output
G Open collector pulse 12VDC 2 wires / 3 wires Z Z Special
K Contact pulse 12VDC 2 wires / 3 wires Output item 2 affix code：⑳
******-******-*****⑳*******-*
Z Special N Non
Temp. i nput：⑩
******-**⑩***-*************-*
Output item 3：㉑㉒
******-******-******㉑㉒*****-*
N Non Pulse output 3
Pressure input：⑪
******-***⑪**-*************-*
M 1 Total mass flow/pulse width 1ms
N Non M 5 Total mass flow/pulse width 50ms
B 1～5V M 9 Total mass flow/pulse width special
E 4～20mA H 1 Total calorie flow/pulse width 1ms
Z Special H 5 Total calorie flow/pulse width 50ms
Densit y inpu t：⑫
******-****⑫*-*************-*
H 9 Total calorie flow/pulse width special
N Non A L Alarm output
Others： ⑬
******-*****⑬-*************-*
Z Z Special
N Non Output item 3 affix code：㉓
******-******-********㉓****-*
Hyphen：⑭
******-******-*************-*
N Non
Output item 1：⑮⑯
******-******-⑮⑯***********-*
Output item 4：㉔
******-******-*********㉔***-*
Pulse output 1 Analog output a ssignm ent
M 1 Total mass flow/pulse width 1ms M Instantaneous mass flow
M 5 Total mass flow/pulse width 50ms Z Special
M 9 Total mass flow/pulse width special Analog output hard：㉕
******-******-**********㉕**-*
H 1 Total calorie flow/pulse width 1ms 2 1～5V
H 5 Total calorie flow/pulse width 50ms 5 4～20mA
H 9 Total calorie flow/pulse width special Z Special
A L Alarm output Communication funct ion：㉖
******-******-***********㉖*-*
Z Z Special N Non
Output item 1 affix code：⑰
******-******-**⑰**********-*
R RS-485
N Non Version code：㉗
******-******-************㉗-*
A Version code：A
Hyphen：㉘
******-******-*************-*
Charact eristic：㉙
******-******-*************-㉙
0 Standard
Ｚ Special
STEAM FLOW COMPUTER (
Saturated steam service)
6N-E023JEG1014LE
@ PRODUCT CODE EXPLANATION
5
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Documen t
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 set Only Japanese
Witnes sed by custom er
V 1 0 Required
E-880-2N-E
17
Page 18
E-880-2N-E
All specifications are subject to change without notice for improvement.
2017.09 Revised△
2008.08 Released
E-880-2N-E (1)
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