Oval EL0122 User manual

Ins. No. E-122-8-E
Every OVAL product is manufactured under stringent quality control and thoroughly tested and inspected
before shipment from our factory. To expect the stated performance throughout its service life, please
familiarize yourself with the instructions contained in this manual before use.
Also keep it 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.
TOTAL COUNTER
MODEL EL012 2
3

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1. BEFORE YOU BEGIN............................................................................................................................. 4
1.1 Confirming the Tag ............................................................................................................................ 4
1.2 Transportation Considerations .......................................................................................................... 4
1.3 Storage Considerations..................................................................................................................... 4
2. GENERAL ............................................................................................................................................... 5
3. PART NAMES AND OUTLINE DIMENSIONS ....................................................................................... 5
4. INSTALLATION....................................................................................................................................... 5
4.1 Installation Location .......................................................................................................................... 5
4.2 Installation ......................................................................................................................................... 5
5. WIRING ................................................................................................................................................... 6
5.1 Cables for Field Wiring...................................................................................................................... 6
5.2 Field Wiring and Electrical Connections............................................................................................ 6
5.3 Terminal Block for External Connections .......................................................................................... 6
5.4 Electrical Connections by Type of Input Signal ................................................................................. 8
6. BLOCK DIAGRAM.................................................................................................................................. 9
7. FUNCTIONS AND OPERATION .......................................................................................................... 10
7.1 LCD Counter Display ...................................................................................................................... 10
7.2 About the Displayed Messages during Operation ........................................................................... 10
7.3 Computing Formula for Total Flow and Instantaneous Flowrates ................................................... 10
7.4 Jumper, Switch, Potentiometer Setup and Adjustment ....................................................................11
7.4.1 Construction of Internal Electronics Assembly ...........................................................................11
7.4.2 How to Remove Internal Electronics Assembly..........................................................................11
7.4.3 Waveshaping Function .............................................................................................................. 12
7.4.4 Setup of Other Functions (common to EL0122/0123) LCD Board SW3 ......................................... 13
7.4.5 How to Change Output Signal and Pulse Width (option) .......................................................... 13
7.4.6 Parameter Setup, Alteration, and Adjustment in Analog Output Circuit (option)........................ 13
7.5 Parameter Setup Procedure ........................................................................................................... 14
7.5.1 Procedure to Modify a Parameter ............................................................................................. 14
7.5.2 Procedure to Enter a Parameter ............................................................................................... 14
7.5.3 About Dummy Output Features (special functions)................................................................... 16
7.5.4 Parameter Initialization.............................................................................................................. 16
7.5.5 About Alarm Output (option) ...................................................................................................... 17
7.5.6 About Error Messages............................................................................................................... 18
●Table 7.5 Menu Trees and Switch Operation................................................................................... 20
●Table 7.6 Parameter List.................................................................................................................. 20
8. BATTERY REPLACEMENT.................................................................................................................. 22
8.1 About the Batteries.......................................................................................................................... 22
8.2 Battery Replacement....................................................................................................................... 22
CONTENTS

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9. OPERATION ....................................................................................................................................... 23
9.1 Preparation Before Operation ....................................................................................................... 23
9.2 Operation....................................................................................................................................... 23
10. TROUBLESHOOTING ........................................................................................................................ 23
11. GENERAL SPECIFICATIONS ............................................................................................................ 24
12. PRODUCT CODE EXPLANATION..................................................................................................... 25
12.1 EL0122 ........................................................................................................................................ 25
12.2 EL0123 ........................................................................................................................................ 26
13. FORMER PRODUCT CODE EXPLANATION .................................................................................... 27
13.1 EL0122 ........................................................................................................................................ 27
13.2 EL0123 ........................................................................................................................................ 27
The indications NOTE, CAUTION, and WARNING shown throughout this
manual are to draw your attention to specific items:
NOTE:
Notes are separated from the general text to bring user's attention to
important information.
CAUTION:
Caution statements call attention to user about hazards or
unsafe practices that could result in minor personal injury or
property damage. .
WARNING:
Warning statements call attention to user about hazards or
unsafe practices that could result in serious personal injury or
death.

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1. BEFORE YOU BEGIN
When you received, the product should be thoroughly inspected for any sign of damage by rough
handling during transit.
1.1 Confirming the Tag
Product code and ratings appear on the counter tag. Make sure that the product you received complies
with the specifications in your order.
General Specifications and Product Code Explanation appear on pages 24 and 25, respectively.
When you inquire, supply complete information as to the product name, model number,
product number, ratings, etc.
1.2 Transportation Considerations
(1) The OVAL total counter can best be transported to the installation site in the shipping container
used for transit from our factory.
(2) Avoid giving impact shocks to the total counter during transit.
1.3 Storage Considerations
If the total counter 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 total counter can best be stored in the original package used for transit from the factory.
(2) Select a storage location that meets the following requirements:
 ☆ Free from rainwater and moisture
 ☆ Least vibration and impact shock
 ☆ In the room temperature and humidity environment (around 25℃ and 65% R.H.)
A total counter which has been idle for extended periods of time may possibly require internal
inspection. If such is the case, consult factory.
Tag (nameplate) shows ratings.
Fig.1.1 Tag Location

2. GENERAL
Built around a single-chip microprocessor, this multifunction counter is designed lightweight and compact.
It offers four display functions (cumulative total flow, hourly and per-minute instantaneous flowrate, and
resettable total flow) in a single unit along with a factored pulse output.
A 4-20mA DC and 1-5V DC flowrate output plus high/low alarm output are available as an option (Model
EL0122 only).
3. PART NAMES AND OUTLINE DIMENSIONS
4. INSTALLATION
4.1 Installation Location
(1) Select a location free from mechanical vibration and corrosive gases.
(2) Select a location maintained at room temperature with least temperature variation and free from
moisture.
We guarantee that the counter is operational at ambient temperatures from -10 to +50℃,
but we recommend an installation location where the temperature is controlled to the room
temperature.
(3) Provide a sufficient working space behind the counter to facilitate electrical connections and
maintenance.
4.2 Installation
(1) This counter is designed for panel mount.
(2) Mount the counter as follows:
① Remove panel-mount fittings from the counter and front mount the counter through the opening
cut in the panel.
② Secure the counter to the panel with panel-mount fittings from inside the panel, slightly forcing
them outwardly at first.
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8-digit LCD display
Dimensions in millimeters
Analog/alarm output
terminal block
(option)
(M3.58P)
Terminal block
for ext. conn.
(M3.58p)
96 110
105.5
6.5
48
"ALARM1" LED "ALARM2" LED
"MODE" button
"RESET" button Panel mount fitting
Fig.3.1
Dimensions in millimeters
120 min.
92+0.8
0
45+0.6
0
70 min.
Fig.4.1 Panel Cut

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5. WIRING
5.1 Cables for Field Wiring
Use electrostatically-shielded, polyethylene-insulated, vinyl-sheathed control cables (CEVS 0.75 to 2mm2,
2- or 3-conductor), or equivalent, for input and output signal cables.
5.3 Terminal Block for External Connections
Before connecting the cables, ensure that the flowmeter (pulse generator) is compatible with this counter.
Acceptable combinations of these units can be determined by identifying their model number and
instrument number.
Invalid equipment combination can lead to a costly downtime. Be sure to reconfirm validity
following wiring connections.
5.2 Field Wiring and Electrical Connections
(1) It is recommended that cables be routed through conduits.
Be sure to route the power cable separate from the input and output signal cables.
(2) Keep the cables away from other power cables or power circuits if any, to prevent stray current pickup.
If inductive interference is suspected, use a capacitor or surge suppressor where necessary.
(3) Use crimp-style terminals to ensure good electrical connections. Terminals for connections are located
on the back of this instrument.
Fig.5.2 Extermal Conn. Terminal Blocks
1
A
+ -
+ -
2345678
V
+ -
ANALOG OUT
ALARM1 OUT ALARM2 OUT
12345678
L1(+) ( )L2(
-
)
FLOW INPUT PULSE OUT POWER
SUP SIG. 0V
The upper terminal block at back of the counter is provided only in
models with analog/alarm output.
Terminal block
(Installed in models with analog/alarm output)
Terminal block
Fig.5.1

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Name Terminals Description
Power
6
L1
7
L2
85-264V AC, 50/60Hz
(Model EL0122 only)
(+) (−) or 12−24V DC±10% (Model EL0123 only)
Ground (8) To be earth grounded
Pulse
Input
Contact-closure
or open collector
PG20 Flowpet - 5G,
(N)PG60A(E3)
1, 2, 3 EL0122 1: 12V DC 2: SIG. (+) 3: 0V (−)
2, 3 EL0123 2: SIG. (+) 3: 0V (−)
Voltage pulse PG30
(N)PG60A(F)
1, 2, 3 EL0122 1: 12V DC 2: SIG. 3: 0V
2, 3 EL0123 2: SIG. 3: 0V
Current pulse
PA14, 15, 25
(N)PG60A(E),
PG30S
1, 2 EL0122 1: + (+24 or 12V DC) 2: −
2 EL0123 2: − Load 510Ω(*)
Pulse
Output Open collector 4, 5 4:+ 5:− (Isolated only in Model EL0122)
Analog
Output
4-20mA DC 1, 2 1:+
2:−
Optional feature (Model EL0122 only)
If ①and ②are not used, do not fail to
short them out. Unless so shorted out,
no analog voltage output appears across
terminals 3 and 4.
1-5V DC 3, 4 3:+
4:−
Alarm
Output
Alarm 1 5, 6 Output signal: Non-contact relay ×2 points
Capacity: 230V AC/340V DC, 200mA
"ON" resistance: 16Ωmax. (Leak current 1μA min. at
"OFF")
Alarm 2 7, 8
◎Terminal Block Identification for External Connections
1. Power cannot be supplied to the transmitters of certain flowmeters, such as the
Thermistor Type Vortex Flowmeter, DC Power Type Coriolis Flowmeter, etc.
Prepare a power source separately, or relay it using another device.
2. An asterisk (*) indicates requirement for a separate power source.

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5.4 Electrical Connections by Type of Input Signal
(1) Model EL0122
(2) Model EL0123
Fig.5.4
+
+
-
+ -
-
1 2 3 4 5 6 7 8
L1(+)
(+) (
-
)
L2(
-
)
FLOW INPUT
12V
24V or 12V
12V
0V
SIG.(GENERATOR)
PULSE OUT POWER
SUP. SIG. 0V
OPEN COLLECTOR PULSE
CURRENT PULSE
CONTACT-CLOSURE PULSE
2-WIRE SYSTEM
VOLTAGE PULSE
3-WIRE SYSTEM
OPEN COLLECTOR PULSE
3-WIRE SYSTEM
VOLTAGE PULSE
POWER TO PULSE GENERATOR
12V DC TO 24V DC
1. FOR CURRENT PULSE OR 3-WIRE
SYSTEM PULSE INPUT, AN ADDI-
TIONAL POWER SUPPLY FOR
PULSE GENERATOR IS REQUIRED.
2. POWER SUPPLY TO PULSE GEN-
ERATOR MAY BE COUPLED TO
POWER TERMINALS TO PROLONG
BATTERY LIFE.
3. POWERISNOTSUPPLIEDBY
EL0123.
Fig.5.3
+
+
-
-
12345678
L1(+)L2(
-
)
FLOW INPUT
12V 0V
SIG.
(GENERATOR)
PULSE OUT POWER
SUP. SIG. 0V
OPEN COLLECTOR PULSECURRENT PULSE
CONTACT-CLOSURE PULSE
2-WIRE SYSTEM VOLTAGE PULSE
3-WIRE SYSTEM OPEN COLLECTOR PULSE
3-WIRE SYSTEM VOLTAGE PULSE

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6. BLOCK DIAGRAM
(1) Model EL0122
(2) Model EL0123
In the Model EL0122 overall block diagram above, the following circuits are eliminated:
①Regulated voltage supply (transformer) circuit and power circuit to the pulse generator because it
operates on the battery.
②Isolation circuit and F/I board (option).
Pulse inPulse out
1
2
3
4
5
6
7
8
POWER
GND
Power to
generator
J5
J1
1
J2
2 3
12V
12V
BATT
Stabilized
voltag
supply
(trans.)
1A
Voltage
detect RESET MODE
BATT LCD COUNTER
CPU
LCD board F/l board (option)
E2PROM
1/2 1/5 1/10
SW3-4
1/1
SW3-5
1/2
SW3-6
1/10
SW3-7
1/100
SW3-8
Factored (std.)
SW3-10
Unfactored
Power board
250Ω
Analog
output
Alarm
output
Alarm 1
Alarm 2
①+
4〜20mA
1〜5V
②−
③+
④−
④
⑤
⑥
⑦
Battery (option) for EL0122 serves to light the LCD when power is off.
Fig.6.1

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7. FUNCTIONS AND OPERATION
The counter is designed to show the following
variables on the display using "MODE" and "RESET"
pushbuttons.
7.1 LCD Counter Display
Upon each depression of "MODE" button, the LCD
display scrolls through available variables as shown
Only incoming pulses having small periodic
variation produce meaningful readins.
(See section 7.3.)
RESET button is operative only in this mode.
The counter resets to zero upon "RESET"
button depression.
7.2 About the Displayed Messages during Operation
(1) Ordinary operation
"MODE" switch is turned "ON"
⇒8 bars appear.
⇒Immediately turning "OFF" scrolls the window
to the next one. ⇒Holding turned ON until the last bar disappears results
in "prolonged depression" processing (Turning OFF
before the last bar disappears results in the same
behavior as in ①to take place.)
※ Prolonged operation: An operation required for Normal
mode ⇔Parameter review mode selection, finalizing
the parameter setting, etc.
Indicates a countdown before "prolonged depression"
processing takes place.
(2) Prolonged operation
"MODE" switch is held turned ON without turning
"OFF" immediately by removing the fingers.
⇒Bars begin to disappear from the leftmost one.
7.3 Total Flow and Instantaneous Flowrate Calculation and About Factored Pulse Output
(1) Total flow
Each time a single pulse (after frequency division by hardware means) arrives at the CPU, "Parameter
F×Parameter H" is added up to the current reading of total flow.
●The LCD shows a reading down to the decimal places set at "Parameter SP" menu.
●When the reading has reached its maximum reading (99999999), the reading returns to zero.
(2) Factored pulse output
Produces a pulse output to read in the unit set at "Parameter Pu" menu.
"ALARM2"
LED
"ALARM1"
LED
"MODE" button
Fig.7.1
"RESET" button
When the RESET switch is pressed in a mode where the RESET switch is valid, the display
behaves the same as described above. (There is no distinction between ordinary operation and
prolonged operation, however.)
Accumulated total flow
Display
Instant.
flowrate /h
/min
Instant.
flowrate
Resettable total flow
Mode code
Indicates that the switch is turned "ON."
Freq. division
Hardware
1/1 or 1/10 or 1/100
Incoming pulses
CPU
(F×H)
Pu
LCD display
Factored pulse output
C 0