Oval ALTImass CA004, ALTImass PA0K Instruction Manual
Ins. No.
L-737-3-E
Extra-high pressure service Coriolis flowmeter
ALTI
mass
Sensor Unit MODEL : CA004
Transmitter MODEL : PA0K
Every OVAL product is fabricated, tested, and inspected under stringent quality control before it leaves our
factory.
To derive maximum benefit from this product, we recommend you to be well familiar with the information and
instructions given in this manual before you place it in service, and keep this manual handy for quick reference.
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L-737-3-E
CONTENTS
1. BEFORE YOU BEGIN ............................................................................................ 5
1.1 Confirming the Tag Information ...................................................................................................5
1.2 Transportation Considerations ....................................................................................................6
1.3 Storage Considerations ...............................................................................................................6
1.4 Operating Conditions ..................................................................................................................6
1.5 Precautions at Installation ...........................................................................................................6
1.6 Precautions for power-on ............................................................................................................6
1.7 Returning Equipment ...................................................................................................................6
2. GENERAL AND FEATURES ................................................................................. 7
2.1 General ........................................................................................................................................7
2.2 Features ......................................................................................................................................7
3. SPECIFICATIONS AND PERFORMANCE ............................................................. 7
3.1 Sensor Unit ..................................................................................................................................7
3.1.1 General Specifications ............................................................................................................7
3.1.2 General Performance .............................................................................................................8
3.1.3 Pressure Loss ........................................................................................................................ 8
3.2 Transmitter General Specifications .............................................................................................9
4. PART NAMES AND OUTLINE DIMENSIONS .................................................... 10
5. INSTALLATION .................................................................................................... 12
5.1 Considerations at Installation .................................................................................................... 12
5.2 Physical Orientation .................................................................................................................. 12
5.3 Piping Instructions ..................................................................................................................... 12
5.3.1 Standard Piping Conditions ................................................................................................. 12
5.3.2 Influences of Vibration and Pulsations ................................................................................ 13
5.3.3 Prevention of Cavitation ...................................................................................................... 13
5.3.4 Prevention of Excessive Flow Rate ...................................................................................... 13
5.3.5 Keeping the Sensor Unit Completely Filled ......................................................................... 13
5.3.6 Bypass Line ........................................................................................................................ 13
5.4 Installation Instructions ............................................................................................................. 14
5.5 Sensor Unit-to-Tubing Connection Guidelines .......................................................................... 14
5.5.1 Machining the Female Connector (for reference purpose) .................................................14
5.5.2 Connection Procedure ........................................................................................................ 15
5.6 Securing the Sensor Unit and Tubing Clamps .......................................................................... 16
5.7 Heat Insulation Work ................................................................................................................. 17
5.8 Separately Mounted Transmitter Installation ............................................................................. 18
5.9 How to Change Transmitter Orientation .................................................................................... 19
5.10 How to Change Transmitter Display Orientation .....................................................................20
6. WIRING INSTRUCTIONS ..................................................................................... 22
6.1 Terminal Box Cover Removal .................................................................................................... 22
6.2 Wiring Connections ....................................................................................................................22
6.2.1 Cable lead-in ....................................................................................................................... 22
6.2.2 Power and output signal connections (both integrally and separately mounted models) .... 23
6.2.3 Connections between separately mounted sensor unit and transmitter .............................. 24
6.3 Power Supply Lines and Ground Terminal ................................................................................. 24
6.4 Analog Output Wiring ................................................................................................................. 24
6.5 Pulse Output Wiring ...................................................................................................................24
6.6 Status Output Wiring ..................................................................................................................25
6.7 Status Input Wiring ..................................................................................................................... 25
6.8 Communication Line Wiring (option) ..........................................................................................26
6.9 Recommended Cables for Use in Output Signals .................................................................... 26
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L-737-3-E
6.10 Terminal Identification of Remotely Mounted Transmitter ....................................................... 26
6.11 Wiring Diagram ........................................................................................................................ 27
6.11.1 Transmitter power and output signal wiring.........................................................................27
7. REMOTELY MOUNTED TRANSMITTER AND SENSOR UNIT WIRING ........... 28
8. OPERATION ......................................................................................................... 29
8.1 Flushing the Piping Assembly ....................................................................................................29
8.2 Confirming the Sensor Unit for Correct Installation ...................................................................29
8.3 Leak Check ................................................................................................................................29
8.4 Supplying the Power ..................................................................................................................29
8.5 Measurement Line Startup ......................................................................................................... 29
8.6 Warm-up ................................................................................................................................... 29
8.7 Zeroing Procedure .....................................................................................................................29
8.8 Readying for Operation ..............................................................................................................29
9. DESCRIPTION OF INCORPORATED FUNCTIONS ............................................ 30
9.1 Display ........................................................................................................................................30
9.1.1 Description of display ........................................................................................................... 30
9.1.2 Switch operation ................................................................................................................... 31
9.1.3 Viewing the variables ........................................................................................................... 32
9.2 Viewing the Parameters and Description ...................................................................................34
9.2.1 Viewing the setup menu .......................................................................................................35
9.2.2 Transition chart of view (1) ...................................................................................................36
9.2.3 Transition chart of view (2) ...................................................................................................38
9.2.4 Transition chart of view (3) ...................................................................................................40
9.2.5 Transition chart of view (4) ...................................................................................................42
9.2.6 Transition chart of view (5) ...................................................................................................44
9.2.7 Transition chart of view (6) ...................................................................................................46
9.3 Parameter Value Entry ............................................................................................................... 48
9.4 Parameter Selection ...................................................................................................................49
9.5 Password Function .....................................................................................................................50
9.5.1 Password function setup ......................................................................................................50
9.6 Self-diagnostic Capabilities ........................................................................................................ 51
9.6.1 Probe check .........................................................................................................................51
9.6.2 Drive coil check ....................................................................................................................52
9.6.3 Transmitter check ................................................................................................................. 53
9.6.4 Pipeline oscillation check (at zero flow) ................................................................................54
9.6.5 Pipeline oscillation check (normal flow) ...............................................................................55
9.7 Simulated Signal Input/Output Capabilities ................................................................................ 56
9.7.1 Analog output ....................................................................................................................... 56
9.7.2 Pulse output ......................................................................................................................... 57
9.7.3 Status output.........................................................................................................................58
9.7.4 Status input ...........................................................................................................................59
9.8 Zeroing Function ........................................................................................................................60
9.8.1 Through LCD display switches ............................................................................................. 60
9.8.2 Through status input signal .................................................................................................. 61
9.8.3 Through Link Top communication ........................................................................................ 61
9.9 Analog Trim Function .................................................................................................................62
9.10 Reset Function ..........................................................................................................................63
9.11 View Variables Screen Setup ...................................................................................................64
9.12 Pulse Output Function ..............................................................................................................65
9.12.1 Pulse output 1 .....................................................................................................................65
9.12.2 Pulse output 2 .....................................................................................................................65
9.12.3 Bidirectional pulse output ...................................................................................................66
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L-737-3-E
9.12.4 Double pulse input ..............................................................................................................67
9.13 Analog Output Function ............................................................................................................68
9.14 Status Output Function .............................................................................................................69
9.14.1 Status output (Error Status).................................................................................................69
9.14.2 Bidirectional flow direction output (Bi Direction) .................................................................69
9.14.3 H/L alarm output (H/L Alarm) ............................................................................................. 70
9.14.4 No assignment (No Function) ............................................................................................70
9.14.5 No assignment (No Function) ............................................................................................70
9.15 Status Input Function ................................................................................................................ 71
9.15.1 Pulse/analog output fixed at 0% (0% Sig Lock) ................................................................. 71
9.15.2 Zero adjustment (Auto Zero) .............................................................................................. 71
9.15.3 Totalizer 1 and totalizer 2 reset (Reset Total 1 and 2) ........................................................ 71
9.15.4 Totalizer 1 reset (Reset Total 1) .........................................................................................72
9.15.5 Totalizer 2 reset (Reset Total 2) .........................................................................................72
9.16 High/Low Alarms Function ........................................................................................................ 73
9.17 Gas Mixed Flow Alarm ..............................................................................................................75
9.18 Setup Units List .........................................................................................................................77
10. MAINTENANCE .................................................................................................. 78
10.1 Error Messages ........................................................................................................................78
10.2 List of Status Messages ........................................................................................................... 79
10.3 Replacement Parts ...................................................................................................................80
10.4 Explosionproof specification .................................................................................................... 81
10.5 Precautions on the explosionproof specification ......................................................................82
10.5.1 About the explosionproof ....................................................................................................82
10.5.2 About handling of the flameproof enclosure .....................................................................82
10.5.3 Insulation performance ......................................................................................................84
10.5.4 Earthing terminal ...............................................................................................................84
10.5.5 About dedicated cable (for only separate type) .................................................................84
10.5.6 Maintenance and checking ................................................................................................85
11. EX-INFORMATION .............................................................................................. 86
11.1 Nameplates ............................................................................................................................... 86
11.2 System Block Diagram (Control Drawing) ................................................................................87
11.3 Inductance and Internal Resistance of Sensor Coil .................................................................89
11.4 Regarding FISCO System of FOUNDATION fieldbus and PROFIBUS ................................... 89
11.5 Explosionproof Applicable Temperature (Integrally Mounted Type Only) ................................91
12. ABOUT MARITIME CERTIFICATION ............................................................... 92
13. PRODUCT CODE EXPLANATION ................................................................... 93
■ SHIPPING PARAMETERS ..............................................................................................................94
■ SAFETY STATEMENT ON RETURNED GOODS ..........................................................................96
■ REPAIR REQUEST SHEET .............................................................................................................97
This manual uses the precaution words "NOTE", "CAUTION", and "WARNING" as explained
below:
NOTE: Notes are separated from the general text to bring the user's attention to
important information.
CAUTION: Caution statements inform the user of hazards or unsafe practices which
could result in minor personal injury or product/property damage.
WARNING: Warning statements inform the user of hazards or unsafe practices which
could result in severe personal injury or death.
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L-737-3-E
1. BEFORE YOU BEGIN
Once you receive the product, it should be thoroughly inspected for any sign of damage by rough handling
during transit.
Carefully read the precautionary notes on handling in this section.
If you have something to inquire, contact the nearest OVAL sales/service office in your
district.
1.1 Confirming the Tag Information
Product code and major ratings appear on the meter nameplate. Make sure that the product you received
complies with the specifications in your order.
Item Description
MODEL Product model
SERIAL NO. Serial number
MAX. PRESS. Max. operating pressure
MAX. TEMP. Max. operating temperature
FLOW RANGE Flow range
POWER Power
TAG NO. Instrument No. (only when specified)
BORE Nominal size
DATE Date of manufacture
Fig. 1.1 Product Tag and Location
NOTE: When you inquire, please provide information such as product name, model number, serial
number, ratings, etc.
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L-737-3-E
1.2 Transportation Considerations
(1) The OVAL flowmeter can best be transported to the installation site in the shipping container used for
transit from the factory.
(2) Avoid impact shocks during transit.
1.3 Storage Considerations
If the meter is to be stored for extended periods of time upon receipt before installation, unexpected problems
could arise. If such is the case, the following considerations should be taken:
(1) The flowmeter 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 shock
Storage/shipping conditions
Temperature：20±15℃ Relative humidity：65±20％ Barometric pressure：500 to 1060hPa
1.4 Operating Conditions
In order to maintain the designed metering accuracy and long service life, it is essential that the ratings, such
as the flow rate, pressure, and temperature be kept within the specified limits. These operating conditions are
stated in Sections "3. SPECIFICATIONS AND PERFORMANCE" and "13. PRODUCT CODE EXPLANATION" of
this manual. Make sure to fully understand them before placing the meter in service.
◦ If the process fluid is corrosive, the meter materials must be reviewed for compatibility.
◦ Cleanse the interior of flow tube thoroughly after use for measuring fluids that tend to deposit
solids. If solid deposits adhere to flow tube, it can affect the meter accuracy.
◦ If you need to change operating conditions, consult OVAL.
◦ Some gasmixtures that are not homogeneous cannot be measured. Consult OVAL for applicability.
1.5 Precautions at Installation
CAUTION:
To ensure accurate and stable measurement, the Coriolis flowmeter should be
installed in a location where piping vibration will not exceed 0.3G.
1.6 Precautions for power-on
Be sure to close the display lid and the terminal lid of the transmitter before turning on the power. The
explosionproof enclosure must be ensured (with the requirements stated in section 10.5 satisfied) before use.
To ensure the stable measuring condition, allow 20 minutes of warm-up period. "WARM UP 20" will be
displayed for 20 minutes after powering-on. The number indicates remaining warm-up period (min.).
1.7 Returning Equipment
If the meter must be returned to OVAL for any reason, follow these steps to ensure the most efficient
processing.
(1) Clean the unit and flush out the flow tube and pack the sensor unit carefully. Fully document the fluid.
Inadequate information will delay handling of the meter. (⇨ Fill in the forms prepared on pages 96 and 97.)
(2) Enclose complete information about the contents being returned including model and serial numbers,
the reason for return, return address, and full documentation of the type of fluid in writing.
(3) Pack the equipment carefully, using the original packing if possible.
(4) Return the complete flowmeter, including, for instance, the transmitter with all associated components.
Remove the conduit connections and all other parts not originally shipped with the meter (for
example, wiring connections).
Be sure to completely remove any foreign matter inside the sensor unit . Because the sensor
unit cannot be disassembled, OVAL will not be able to clean residue inside the tube and service
your meter.
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L-737-3-E
2. GENERAL AND FEATURES
2.1 General
Our concentrated effort in developing true state-of-the-art measuring devices and specialized manufacturing
experience in Cor iolis technology has resulted in this ex tra-high pressure ser vice Coriolis flowmeter
characterized by outstanding performance, ease of use, and increased safety.
It consists essentially of a sensor unit and a transmitter (PA0K). Equipped with a high performance transmitter
having a self-diagnosis function, large screen display, and the capability to change settings on-site by
touchscreen, This Coriolis flowmeter can directly measure mass flow rate with high accuracy.
2.2 Features
(1) High accuracy and high sensitivity.
(2) Accepts both liquid and gas. Measures a wide flow range accurately.
(3) Measures temperature besides mass flow rate.
(4) Branchless flow path design offers ease of cleaning.
(5) No welded point in the wetted parts − a truly dependable design suitable for high pressure gas
measurement.
(6) The wetted parts are made of XM-19 which is resistant to hydrogen embrittlement. Therefore this model is
especially suitable for the flow measurement of high-pressure hydrogen.
(7) The meter casing has a high mechanical rigidity for ease of use, reducing space requirements, and
increasing process safety.
(8) Explosionproof design allows for its use in hazardous locations.
3. SPECIFICATIONS AND PERFORMANCE
3.1 Sensor Unit
3.1.1 General Specifications
Item Description
Model CA004
Measuring Tube O.D. 9/16
Materials
Connector connection
Acceptable fluids Liquid and gas ※1
Density range 0 to 2.0 g/mL
Temperature range
(Structural rating)
Max. operating pressure 120MPa (at 93℃ )
Flow direction Forward and reverse, both available
Explosionproof configuration (See the topic under 10.4 Explosionproof specification)
Weight
(Terminal box and mtg. base incl.)
Wetted parts TPXM-19 UNS S20910 SA-312
Housing SUS304
High-press. cone & thread connection, size 9/16 562C
(male thd. 1•1/8-12UNF)
−40 to +130℃
Approx. 21kg
NOTES
※1: For hydrogen gas at 20℃, the required operating pressure [MPa] can be calculated as
measuring flow rate [kg/h] times 0.19. (e.g. approx. 22.8MPa or more when 120 kg/h)
For the precise required operating pressure, contact OVAL.
※: For the High Pressure Gas Safety Act applicable model, contact OVAL.
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L-737-3-E
ΔP
2
＝C× ×
1
d
μ
2
μ
1
d
C
ΔP＝
（MP a ）
0.00001
0.1 1 10 100 1000
0.0001
0.001
0.01
0.1
1
10
100
1000mPa・s
100mPa・s
10mPa・s
1mPa・s
0.01mPa・s
3.1.2 General Performance
Item Description
Model CA004
Max. allowable rate 300kg/h
Flow rate
Pressure loss
(Reference)
Max. service rate
Min. setting rate 6kg/h
Guaranteed min. rate 2.4kg/h
Accuracy
Repeatability
9.6kg/h or above to 300kg/h or less ±0.5% of RD
9.6kg/h or above to 300kg/h or less ±0.25% of RD
Less than 9.6kg/h ±0.05% of max. allowable rate
Less than 9.6kg/h ±0.025％ of max. flow rate
Analog output accuracy ±0.1% of FS added to each accuracy
Water: at Max. allowable
rate
120kg/h
1.15MPa
CAUTION:
1. Since the casing of sensor unit is not pressure resistant, the withstanding pressure rating
of the casing is not indicated. To afford adequate protection to personnel, an Rc 1/4 boss is
provided in an area shown in Fig. 4.1; Use customer's discretion in providing a rupture disc,
pressure switch, etc. Rupture disc pressure rating and pressure switch setting is 7 MPa (G).
A precaution to remember: removing the Rc 1/4 plug with the boss pointing downward may
result in the leakage of inert argon gas. In this case, refill with an inert gas, such as argon.
For further details of treatment, consult OVAL.
2. Density measurement and volumetric flowmetering are unacceptable.
3.1.3 Pressure Loss
◎How to determine pressure loss (liquids only)
(1) Find the pressure loss coefficient C from the flow rate (kg/h) and viscosity of parameter (mPa・s). Dividing this
value C by specific gravity d (1 for water) gives the pressure loss, thus
(2) For high-viscosity liquids not shown in the graph, calculate the pressure loss by using the following equation:
where ΔP2 : Pressure loss of high-viscosity liquid (MPa)
μ2 : Viscosity of high-viscosity liquid (mPa･s)
d : Specific gravity of high-viscosity liquid (1 for water)
μ1 : Maximum viscosity shown in the graph (mPa･s)
C : Pressure loss coefficient found from the maximum viscosity curve at a given flow rate (kg/h)
(3) For pressure loss of gases, consult OVAL.
CA004
8
Pressure loss coeff., C
Flow rate (kg/h)
Fig. 3.1
3.2 Transmitter general specifications
Item Description
Model PA0K
Power supply
Power consumption Max. 15W
Ambient temperature － 40 to +55℃ ( ※ 1)
Transmission length (separate type)
Applicable EU directive
Applicable EN standards
Explosionproof configuration
Maritime certification DNV GL (Refer to section 12)
Dusttight, waterproof configuration IP66 / 67
Transmitter configuration Integral or separately mounted
Finish Sensor: Munsell 10B8/4, Covers (front and rear): 2.5PB4/10
Display
Weight Integrally mounted model 3.6kg approx., Separately mounted model 5.0kg approx.
Communication interface
※ Optional except for HART
Damping (default)
Low flow cutoff (default)
Pulse output ( ※ 5)
Analog output ( ※ 5)
Status output ( ※ 5)
Status input ( ※ 5)
85 to 264VAC 50/60Hz or 20 to 30VDC
(Safety rated 100 to 240VAC 50/60Hz)
Max. 200m (Dedicated cable used) ( ※ 2)
EMC Diective ：2014/30/EU
ATEX Diective：94/9/EC
LVD Diective ：2014/35/EU
EMC ：EN61326-1：2013 ClassA
ATEX：EN60079-0：2012 EN60079-1：2007 EN60079-11：2012
IECEx：IEC60079-0：2011 IEC60079-1：2007-04 IEC60079-11：2011
LVD ：EN61010-1：2010
ATEX, IECEx, KCs, CSA, GOST, NEPSI
(See the topic under 10.4 Explosionproof specification)
LCD display provided (128 × 64 dots), backlit (white, orange)
Infrared light sensors: 2, LED: 2 (green, red)
HART (Standard)
Modbus
FOUNDATION
fieldbus
PROFIBUS PA AI block × 4, TOT block × 2
Flow rate 0.8sec, density 4sec, temperature 2.5sec.
Under 0.6% of max. service flow rate
Open drain output (equivalent to open collector output ) [Min. 10V to Max. 30V, 50mADC, ON
resiatance 0.6Ω or less] or
Voltage pulse (Low level: 1.5V max., High level: 13V min. Output impedance: 2.2k Ω )
Setting range: 0.1 to 10000Hz (Max. output 11000Hz)
4 to 20mADC (max. load 600Ω)
Select two outputs from instant flowrate (mass or volume) temperature, and density.
Open drain output (equivalent to open collector output ) [Max. 30V, 50mADC, ON resiatance
0.6Ω or less]
Select one output from error ( ※ 4), flow direction, or high/low alarm (default is error)
Contact-closure input (Form "a" contact) Short: 200 Ω max., Open: 100k Ω min.
Select one output from remote zero, total reset, 0% signal lock, or function off (default is
function off).
HART protocol version 7, Bell202 ( ※ 3)
RS-485 Modbus protocol, Baudrate : 9600bps, 19200bps, 38400bps
RTU or ASCII, Response time : 25 to 50 ms
AI block × 4, IT block × 2, with Link Master function
L-737-3-E
NOTES
※1: Below -20℃, the display loses its visibility due to weakened contrast. Both the display and infrared sensor
may exhibit slow responses below -20℃.
※2: If signal transmission length exceeds the maximum transmission length, consult OVAL.
※3: Of the two analog output systems,only analog output 1 is available for HART communication.
※4: Of error outputs, "zero is in progress" status output can also be set up.
※5: When FOUNDATION fieldbus, PROFIBUS PA is selected as the communication interface, all input and
output signals will be turned off.
※: Denoising parts are embedded in the lines between power source, output, communication, and the chassis.
Lower the applied voltage to the following levels in order to conduct insulation test or withstand voltage test
on these lines.
AC: 200V, DC: 250V
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2-Rc1/4 Inert Gas Filler Opening
Normally sealed with Rc1/4 plug
Rupture disk, pressure switch, etc.
may be connected here.
The sections indicated by dashed-dotted line are to be implemented by the user
(With rupture disk for implementing option)
Recommended joint: Swagelok tube joint
Model: SS-810-1-4RT (External thread: 1/4B, External diameter of tube: 1/2B)
43.4
The sections indicated by dashed-dotted line are to be implemented by the user
(With rupture disk for implementing option)
Recommended joint: Swagelok tube joint
Model: SS-810-1-4RT (External thread: 1/4B, External diameter of tube: 1/2B)
43.4
View A−A
View A−A
272
457
A A
115
67
96
4-M6 Hex socket bolt
Tighten M6 bolts of the joint clamp
after fixing the joint connection.
High-press. Cone & Thread
Conn., 9/16 dia. 562C
192
229
φ134
φ115
60
15
64
2-M5 Body GND
8-φ14.5
4-M10 Meter fitting bolt (embedded)
4-M10 Meter fitting bolt (embedded)
2-Rc1/4 Inert Gas Filler Opening
Normally sealed with Rc1/4 plug
Rupture disk, pressure switch, etc.
may be connected here.
127
230
200
160
200
160
200
160
96
96
98
272
4-M6 Hex socket bolt
Tighten M6 bolts of the joint clamp
after fixing the joint connection.
High-press. Cone & Thread
Conn., 9/16 dia. 562C
Conduit
Connection
G3/4
A A
457
192174
φ115
15
φ107
2-M5 Body GND
8-φ14.5
200
160
96
4. PART NAMES AND OUTLINE DIMENSIONS
Transmitter integrally mounted
●
Transmitter separately mounted
●
10
Fig. 4.1 Outline Dimensions
L-737-3-E
φ134
67
4-M6×8
230
127 103
100
64
7
50
125
60
188
60
30
60
30
344
233
61.7
171.5
46
CableentryG3/4
CableentryG3/4
Hold-down
hardware
(2×1)
Stanchion(2)
Separately mounted Transmitter
●
Dimensions in millimeters
※ Hold-down hardware are supplied as standard accessories, but the customer is to furnish the stanchion.
Fig. 4.2 Outline Dimensions of Transmitter
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5. INSTALLATION
5.1 Considerations at Installation
(1) Select a location easy to access for inspection and maintenance.
(2) Avoid locations subject to severe temperature variation and vibration.
(3) Avoid direct exposure to the sun. (Provide a sunshade or visor if necessarry.)
(4) Avoid locations where there is a risk of immersion in water.
(5) Select a location free from an atmosphere of corrosive gases.
(6) Location should be free from dust and mist.
(7) Keep a distance of at least one meter from sources of electr omagnetic induction, such as la rge
transformers and motors. Install sufficiently away from motors, pumps, or other sources of high vibration.
(8) To ensure consistent and accurate measurement, adhere to the instructions for tubing clamps on page 16.
(9) To ensure accurate and consistent measurement, use the Coriolis flowmeter in a location where piping
vibration is kept below 0.3G.
(10) Instal the control valve downstream of the flowmeter.
Where cavitation may possibly occur, install the valve at least five meters away from your meter.
5.2 Physical Orientation
Physical orientation does not affect the performance of this unit. It can be installed either in a horizontal or
vertical run. However, with metered fluids that tend to produce bubbles and/or sediments, or where process
fluid removal or purging is conducted after measurement, install the unit in a vertical run.
5.3 Piping Instructions
5.3.1 Standard Piping Conditions
(1) A Coriolis mass flowmeter is unaffected by the
flow pattern of process fluid.
T h e r ef o r e , it do e s no t r e q ui r e a n y fl o w
straighten e r. Howeve r, c o n n e c tion w i t h a
deformed pip e re quires use of a con centric
reducer or tapered pipe.
(2) Locate the meter sufficiently away from known
sources of vibration and pulsation.
(3) For zeroing, provide a valve that can stop the
flow completely downstream of the meter. We
recommend to provide another valve upstream
of the meter for servicing.
(4) Avoid piping stress concentration on the sensor.
Flow
Direction
Valve
Fig. 5.1 Standard Piping Conditions
Valve
CAUTION:
12
Although this meter is designed for installation on a mounting base, piping
clamps must be provided both upstream and downstream of the meter.
L-737-3-E
5.3.2 Influences of Vibration and Pulsations
Generally, Coriolis mass flowmeters can best make measurements with minimal pipeline vibration and
pulsations. In applications where vibration and pulsations are not negligible, take the following measures:
(1) Locate the meter sufficiently away from the sources of vibration and pulsations.
(2) Provide attenuators, such as flexible tubes and chambers. However, if this meter itself is the very source
of transmitting vibration to these elements during its operation, a drift in zeroing may result.
To get around this problem, take necessary countermeasures by, for example, locating such elements of
vibration sufficiently apart from the meter.
(3) Close shutoff valves upstream and downstream of the meter at process flow shutdown. (For the sake of
preventing erratic signal generation at shutoff, be sure to prevent pressure buildup inside from exceeding
the max. allowable pressure of the meter.)
(4) If meters of the same kind are to be installed in the same tubing, locate them sufficiently apart (at least 5
times the face-to-face length across the meter) and secure each meter with sturdy supports.
5.3.3 Prevention of Cavitation
Cavitation can cause a loss of meter accuracy in measurement. Maintain line pressures that will not cause
cavitation upstream and downstream of the meter for this reason. Avoid making such an arrangement as to
open the line to the atmosphere immediately downstream of the meter. Care must be exercised particularly in
handling liquids of low steam pressure.
In practice, recommended minimum back pressure (pressure on the downstream side) of the meter is calculated by the formula:
Pd＝3ΔP＋1.3Pv
Where Pd : Downstream pressure (MPa [absolute])
ΔP : Pressure loss across the flowmeter (MPa)
Pv : Steam pressure at the temperature during measurement (MPa [absolute])
5.3.4 Prevention of Excessive Flow Rate
CAUTION:
Exceeding the meter's maximum flow rate will not significantly reduce the
meter's long term durability. However, the output will be held at 110% of the
allowable full scale flow rate.
5.3.5 Keeping the Sensor Unit Completely Filled
CAUTION:
The sensor must be filled with the process fluid during measurement.
A partially filled sensor unit results in large errors particularly at zeroing.
5.3.6 Bypass Line
For maintenance and servicing, it is good practice to provide a bypass loop.
Flow
Direction
Valve Valve
ALTImass
Bypass Line
Fig. 5.2 Bypass Line
Valve
13
L-737-3-E
5.4 Installation Instructions
This equipment (sensor unit) is connected to the
piping with high pressure cone & thread fitting, 9/16"
dia. 562C. (Connection examples are shown in Figs
5.3 and 5.4.)
Connector: High pressure cone & thread connection,
9/16" dia. 562C (male thread 1・1/8 - 12UNF)
Set the collar so that the groove faces out.
M6 Hex Soc. Hd. Bolts
Sensor Unit (body)
Sensor Unit (connector)
Piping (Connectors)
Piping
Connector
Clamp
9/16−18UNF LH
Gland Nut
Collar
Fig. 5.4
Fig. 5.3
5.5 Sensor Unit-to-Piping Connection Guidelines
5.5.1 Machining the Female Connector (for reference)
Fi g. 5.5 is a machining dr awi ng for pr epar ing the high pressure cone & t hread conn ection, fe male
connector. See also Fig. 5.6 "Detail Drawing of Connectors".
φ6.5 max. must
be kept strictly.
14
To the Meter
(Sensor Unit)
Weep Hole φ2.34
(2 places)
Fig. 5.5
L-737-3-E
5.5.2 Connection Procedure
(1) Loosen two M6 hex socket head bolts attached to the connector clamp.
(2) Slide the gland nut onto the male connector and insert the collar as shown in Fig. 5.6 (reverse thread).
Collar position is correct if it has been screwed in to the point where one or two threads are visible at the
end of male connector. Normally it is installed in place at our factory.
(3) Ensure that both the cone of the male connector and the customer furnished female connector are clean.
(4) Insert the male connector into the female connector and finger tighten the gland nut. Ensure that the male
connector and female connector are aligned in their axis at this time.
(5) Tighten the gland nut to a tightening torque not exceeding 279kgf・cm [27.4N・m]. When tightening,
hold the female connector using a wrench.
(6) Insert the connector clamp until it comes to the stepped part of the sleeve.
(7) Tighten two M6 hex socket head bolts attached to the connector clamp to secure the gland nut-to-sleeve
firmly.
1・1/8-12UNF
Male Connector
(See Figs. 5.4 and 5.6.)
Collar
Gland Nut
M6 Socket Head Bolt (2 Places)
Flowmeter
Body
Metal Seal
9/16-18 UNF LH
Fig. 5.6 Detail Drawing of Connectors (high pressure cone & thread connection, 9/16" dia. 562C)
Female
Connector
Connector
Clamp
Sleeve
15
L-737-3-E
Piping Clamp
Piping Clamp
Valve
50 to 500mm50 to 500mm
Pedestal
Mtg. Base
400mm
min.
OUT
IN
Increase the rigidity of
the whole assembly
surrounded by dotted
line as high as possible.
Secure firmly using
anchor bolts, etc.
5.6 Securing the Sensor Unit and Piping Clamps
To ensure accurate and consistent measurement, observe the following guidelines:
This is particularly important in applications where excessive piping vibration is observed, or during low flow
measurement.
◦Secure adequate rigidity between the mounting base and piping clamps both upstream and downstream.
◦Ensure rigid installation of piping clamps without using cushioning materials, such as rubber pads.
◦Secure adequate rigidity of the piping assembly itself from the sensor unit to piping clamps.
◦A change in the spring elements in the area surrounded by dotted lines may cause zero drift.
The sensor unit and mounting base are secured with four M10 bolts (designed to prevent them from
loosening) when shipped from the factory. On the rare occasion you find loose bolts, retighten them.
◦Secure the mounting base to a sturdy pedestal that is firmly fixed to a place without vibration.
CAUTION:
Secure the sensor unit firmly to a sturdy pedestal through the mounting base,
using M12 bolts and nuts (customer to furnish). With possible inadequate
seating of the mounting base on the pedestal in mind, OVAL furnishes
eight sets of spherical washers and four sets of flange nuts as standard
accessories with the product. Use them in combination with M12 bolts.
16
Fig. 5.7 Piping Clamps
L-737-3-E
5.7 Heat Insulation Work
In applications where the process fluid is of low or high temperatures, only the sensor unit should be heat
insulated. Do not insulate the adapter and terminal box. We recommend simple sensor lagging to facilitate
inspection and maintenance. Exclude the transmitter electronics.
(1) Careful attention should be paid to the maximum permissible temperature when steam trace is applied.
Maintain the tracing temperature around that of the process fluid (see General Specifications).
(2) If steam, warm water or oil is used, secure by spot welding the copper tubing, or of other material, to the
sensor unit when you spirally wrap the tubing around the sensor unit (Fig. 5.8).
NOTE: To minimize transmission of oscillation to the sensor, the spirally wrapped copper tubing should
start and end at locations as close to the connector as possible (see Fig. 5.8).
CAUTION:
Do not use electric heaters which can be a source of noise.
Copper
Tubing
Sensor Unit
Tubing
Spot Weld
Tube Retainer
(Material: SUS sheet)
Terminal Box
Fig. 5.8 Heat Retention Work
17
L-737-3-E
5.8 Separately Mounted Transmitter Installation
(1) The maximum transmission cable length varies with the type of sensor unit: locate the transmitter within this
range.
(2) Secure the transmitter to a horizontal or vertical steel pipe 2 inches in nominal size using the U-bolts
furnished as standard accessories.
(3) Installation location should be accessible for maintenance and in good environment.
(4) The customer to furnish the stanchion (steel pipe).
CAUTION
Avoid installation in such location as
① Difficult to access for maintenance and servicing.
② Excessive temperature changes and vibration.
③ Potential immersion in water.
Installation on a vertical pipe
Hold-down hardware ※
U-bolt
(2˝×1) ※
※: U-bolts, hold-down hardware and bolts
are standard accessories.
Fig.5.9
18
L-737-3-E
5.9 How to Change Transmitter Orientation
WARNING: Be sure to turn off power before you start working.
To change transmitter orientation, follow the steps given below:
(1) Turn off power.
(2) Make preparations for conduit and cable so that they will by no means cause you any trouble while
changing transmitter orientation.
Work on a level plane with the transmitter up and the sensor secured so that loosening bolts will not
cause the transmitter to come off.
(3) Loosen bolts holding the transmitter adapter with hex wrench. See Fig. 4.10 (M8 hex socket head
screws at four places).
WARNING: Never loosen the hex socket head screws located on the
transmitter body.
WARNING: You may loosen bolts but never separate the transmitter from
the sensor unit.
(4) Rotate the transmitter to the desired position and secure it with setscrews (four places).
Transmitter rotatable over an arc of 180°max.
Loosen four hex socket head screws (M8) at the
adapter and change the transmitter orientation.
Never loosen these screws
located on the transmitter body.
M8 Setscrew
(4 places)
Fig.5.10
CAUTION
The transmitter may be rotated over an 180°arc as shown in Fig. 5.10, but rotating it
beyond 180°will twist the harness from the sensor unit to the extent the equipment is
damaged.
(5) Confirming that the transmitter is secured in place, make conduit and wiring connections.
(6) Verify that the flowmeter operates properly.
19
L-737-3-E
5.10 How to Change Transmitter Display Orientation
The transmitter display may be rotated through 360 in steps of 90°within the housing.
WARNING: Be sure to turn off power and discharge your static electricity before you
work.
① Remove the locking part.
④ Loosen display unit fitting screws (3 places) with
precision flathead screwdriver. "Set washers" to
prevent screws from falling out are attached on the
back of display; do not completely remove screws.
② Using a flat tool 10mm wide
approx., turn the display lid
counterclockwise to loosen,
and loosen further by hand. (Be
careful so as not to damage the
finish.)
Fig.5.12Fig.5.11
⑤ Separate the display unit.
③ Disengage the hooks (3 places).
(Recommended tool: Precision
flathead screw-driver)
Fig.5.13
20
Fig.5.14
Fig.5.15
A
B
C
A.B
B.C
A
C
LCD fitting screws
Set washers (3 places)
⑥ For the display unit that has just been removed, it is necessary to take off fitting screws once, adjust the
orientation and re-install them. Shown below are the location of screw holes for different orientations.
(M2.6, 3 places)
L-737-3-E
A
Liquid service,
horizontal run
B
Vertical run
C
Gas service,
horizontal run
Fig.5.16
Connector
pins
Depending on
the transmitter
type, shapes of
the connector or
peripheral parts
may be different.
⑦ Align connector pins (male) on the transmitter with
mating through holes (female) in the display unit.
Display
unit
through
holes
⑧ Tighten screws (3 places) at new screw holes and re-
install into the original position.
Fig.5.18Fig.5.17
CAUTION: When tightening the display lid, tighten securely using a flat tool or similar
instrument. Insufficient tightening can affect gas-tightness and sensitivity of
display,s optical switch.
21
L-737-3-E
6. WIRING INSTRUCTIONS
6.1 Terminal Box Cover Removal
Cable entrance from the transmitter is found on the
bottom of sensor unit. Remove its c over and make
wiring connections at respective terminals.
(1) Using a flat tool, loosen the terminal box cover by
slowly turning it clockwise and then hand rotate it
further until it comes off.
(2) Removing t h e co ver p r o v i d es ac c e s s t o the
terminal block.
(3) Cover reinstallation is the reverse of the removal
procedure in step (1).
NOTE:
CAUTION:
For the explanation of connecting terminals
i n s i d e th e t e r m i n a l bo x , re f e r to 7.
REMOTELY MOUNTED TRANSMIT TER
AND SENSOR UNIT WIRING.
Terminal Box
Turn
Terminal Cover
A Flat Tool (that will not
scratch the finish)
Fig. 6.1
By changing the physical orientation of terminal
box, the internal wiring could be broken if it
is pulled too strongly. If you desire a change,
consult OVAL.
6.2 Wiring Connections
6.2.1 Cable lead-in
For explosionproof models, use the cable gland supplied in the shipment.
For the specifications of the cable gland, refer to 10.5 About Cable Gland.
22
L-737-3-E
6.2.2 Power and output signal connections (both integrally and separately mounted models)
(1) Terminals for wiring connections are found at the back of transmitter housing. Remove the cover
and make wiring connections.
① Using hex wrench, take off latch fitting screw (M3 hex
socket head).
② Using a flat tool, slowly turn the terminal box lid
counterclockwise to loosen and then loosen by hand.
(Use care to avoid damaging the finish.)
Fig.6.2 Fig.6.3
Replaceable fuse
250V, 2A
Status input/output
terminal block
Communication signal
terminal block
Power terminal block
(M4 screws)
Ext. GND terminals
Analog output and pulse
output terminal block (M3.5
screws)
③ Removing the terminal box cover provides access to the cable entry and the power board
holding the power and output signal terminal blocks. The customer is to furnish crimp style
terminals required for power and output signal wiring connections.
Power terminal block for crimp terminals: Round shaped 8.1mm max. O.D. for M4
Output signal terminal block for crimp terminals: Round shaped 7.2mm max. O.D. for M3.5
Status in/out terminal block and communication signal terminal block are of screwless type
and require no crimp style terminals.
Fig.6.4
23
L-737-3-E
C1
J2
NOL
J1-1
J1-2
COUP
DonotmovethejumpersJ1-1andJ1-2fromtheir
defaultpositions(seethefigureontheleft).
6.2.3 Connections between separately mounted sensor unit and transmitter
Terminals for wiring connections with the sensor unit are found on the side of transmitter housing.
Remove the cover and make wiring connections.
① Using a flat tool, loosen the separately mounted
sensor cover by slowly turning it counterclockwise
and further counterclockwise by hand until it comes
off. (Be careful to avoid damaging the finish.)
NOTE:
About jumper on sensor terminal block in Fig. 6.6.
6.3 Power Supply Lines and Ground Terminal
(1) Power source primary lines are connected to
terminals L (＋) and N (－).
(Overvoltage Category II, Pollution Degree 2.)
(2) Connection to earth ground terminal:
Connect only to GND on the power terminal
block or external ground terminal.
② Separating the separately mounted sensor cover
provides access to the terminal block (screwless
terminal block) for the sensor.
Fig.6.6Fig.6.5
External ground
terminal
CAUTION: Supply voltage must be within
the range shown in the
product nameplate attached
to the housing.
Fig.6.7
6.4 Analog Output Wiring
When analog output (4 to 20mA) is to be connected to a receiving instrument, Analog Output 1 has
terminals A1 (＋) and terminal A1 (－) while Analog Output 2 has terminal A2 (＋) and terminal A2 (－).
Maximum load resistance is 600Ω. Analog output setup procedure appears in 9.7.1 Analog output
functions.
※ Analog output will be invalid if FOUNDATION fieldbus, PROFIBUS PA is selected as communication
interface.
24
L-737-3-E
6.5 Pulse Output Wiring
When pulse output is to be connected to a receiving instrument, Pulse Output 1 has terminals P1 (＋) and
terminal P1 (－) while Pulse Output 2 has terminal P2 (＋) and terminal P2 (－).
If voltage pulse signal is your option, signal transmission length has restrictions on output frequency.
Output frequency Max. transmission length ※
10kHz 10m
1kHz 100m
100Hz 1000m
※ Values are based on wire material 0.75 sq in cross section.
To change from voltage pulse output to open drain pulse output, or vice versa, remove the front lid and
select jumper positions as indicated below.
Pulse output 1 jumper
JP3
OPEN: Open drain pulse
CLOSE: Voltage pulse
Pulse output 2 jumper
JP4
OPEN: Open drain pulse
CLOSE: Voltage pulse
Fig.6.8
Pulse output setup procedure appears in 9.7.2 Analog output.
※ Pulse output will be invalid if FOUNDATION fieldbus, PROFIBUS PA is selected as communication
interface.
6.6 Status Output Wiring
Status output appears across terminals S.O. (＋) and S.O. (－).
Status output setup procedure appears in 9.7.3 Status output.
※ Status output will be invalid if FOUNDATION fieldbus, PROFIBUS PA is selected as communication
interface.
6.7 Status Input Wiring
Status input appears across terminals S.I. (＋) and S.I. (－).
Status input setup procedure appears in 9.7.4 Status input.
※ Status input will be invalid if FOUNDATION fieldbus, PROFIBUS PA is selected as communication
interface.
25
L-737-3-E
6.8 Communication Line Wiring (option)
For communications (option), use terminals I/O. (＋) and I/O. (－).
CAUTION: 1. Bell202 HART communications protocol does not use these terminals. It
uses analog output 1 terminal.
2. Other communication interfaces require different handling. Please refer to
the supplementary communication manuals.
FOUNDATION fieldbus communication: "ALTImass series communication
manual for FOUNDATION fieldbus L-740FF"
PROFIBUS PA communication: "ALTImass series communication manual
for PROFIBUS PA L-740PB"
Modbus communication: "ALTImass series communication manual for
Modbus L-740CM"
6.9 Recommended Cables condition
Recommended condition
Item Label
Power
Signal
Communication
Extrnal
ground
L (＋)
N (－)
GND
A1 (＋)
A1 (－)
A2 (＋)
A2 (－)
P1 (＋)
P1 (－)
P2 (＋)
P2 (－)
S.I. (＋)
S.I. (－)
S.O. (＋)
S.O. (－)
I/O (＋)
I/O (－)
Rating voltage/
allowable current
(at 30℃)
300V over, 2A over
100V over, 0.1A over
600V over, 40A over
Cross-section Solderless terminals
1.25sq to 2.0sq
AWG14 to 16
0.75sq to 2.0sq
AWG14 to 18
※1
0.75sq
AWG18
4sq over
AWG12 over
R-type, 8.1mm less
Size: M4
R-type, 7.2mm less
Size: M3.5
Need no Screwless
terminal type
Directly wiring or
Solderless terminal
(R-type, 8.1mm less)
Maximum
operating
temp.
60℃ over
※2
NOTE:
※1 Please select the cable size to be used with the number of signals.
※2 Depending on the number of output signals used, selection for the right cable material
must be made referring to the table on the next page.
6.10 Terminal Identification of Remotely Mounted Transmitter
26
Item
Sensor unit to transmitter
Terminal
name
TB20
TB21
interconnect cable
(200 meters max.) ※
Terminal
No.
1AB BRN
2AB RED
3AB BLK
1AB PUR Temperature input (inner)
2AB ORG Temperature input (outer)
3AB YEL Temperature input
4AB BLU
5AB GRY
6AB WHT
7AB GRN
Terminal
color
Flow tube drive output
BRN/RED, GRN/WHT, BLU/GRY, PUR/ORG/YEL shielded wires
bundled
Right position pickoff sensor input
Left position pickoff sensor input
Description
Status in/out terminals
Analog and pulse
output terminals
Power terminals
Replaceable fuse 250V, 2A
Remote output terminals
Ext. GND terminals
6.11 Wiring Diagram
6.11.1 Transmitter power and output signal wiring
L-737-3-E
●
Terminal identification and description
Item Label Description Remarks
Signal
Power
A1（＋）
A1（－）
A2（＋）
A2（－）
P1（＋）
P1（－）
P2（＋）
P2（－）
S.I.（＋）
S.I.（－）
S.O.（＋）
S.O.（－）
I/O（＋）
I/O（－）
L（＋） Power (with DC power: +)
GND Earth ground
N（－） Power (with DC power: –)
Analog output 1 (4 to 20mA)
Analog output 2 (4 to 20mA)
Pulse output 1
(voltage/open drain output)
Pulse output 2
(voltage/open drain output)
Status input (drain input)
Status output (open drain output)
Expanded in/out
(Modbus communication, etc.)
1. Max. load resistance is 600Ω
for analog output 1 and 2.
2. Pulse output (voltage
pulse) transmission length is
Max. 10m (at 10kHz)
Max. 100m (at 1kHz)
Max. 1km (at 100Hz)
finished O.D: 0.75sq
3. These input and output signals
are invalid for FOUNDATION
fieldbus, PROFIBUS PA and
Modbus communications.
Modbus communication：Max.trans-
mission length1200m at 0.75sq
FOUNDATION fieldbus or
PROFIBUS PA communication:
Max. transmission length 1900m at
0.8sq
Conduct earth grounding work at external ground terminal or "GND" on the power terminal block (Grade
D grounding work).
CAUTION:
Fig.6.9
Incase supplying electric power to this flowmeter, do not fail to connect a
protective fuse of rated voltage 2A max.
27
L-737-3-E
Sensor unit
Terminal Box
T
ransmitter
Cut off shield wires here except for the
shield wire over BRN and RED lines.
Interconnect
cable (Max. 200m)
Transmitter terminal box
Sensor terminal box
Shield
(Protected by black tube)
Shield
(Protected by black tube)
cut
cut
cut
Brown
Red
Green
White
Blue
Grey
Purple
Yellow
Orange
Brown
Red
Green
White
Blue
Grey
Purple
Yellow
Orange
Shield wires:Black
茶
赤
黒
橙
黄
緑
青
紫
灰
白
9mm
7. REMOTELY MOUNTED TRANSMITTER AND SENSOR UNIT WIRING
28
NOTE 1. Make sure to use dedicated interconnect cable.
2. Shield wire preparation
(1) Transmitter end:
As shown in the above figure, bundle shield wires colored in brown/red, green/
white, blue/grey, purple/yellow/orange, twist them, and cover the wires with a black
tube. Then connect only one wire to the terminal box (black) taking care to avoid
potential contact with the housing or conductive parts.
(2) Sensor en
d:
As shown in the figure, cover the brown/red shield wire with a black tube and
connect it to the terminal box taking care to avoid potential contact with the housing
or conductive parts. Clip all shield wires except brown/red as shown in the above
figure.
3. Recommended cable end treatment:
Use of a stick type crimp terminal is not necessary.
Fig.7.1
L-737-3-E
8. OPERATION
8.1 Flushing the Piping Assembly
If scale and sludge are expected to be left in the piping assembly, particularly in a new piping assembly,
flush the assembly prior to sensor unit installation.
8.2 Confirming the Sensor Unit for Correct Installation
For safety,s sake, confirm connecting bolts to tightness and gaskets for condition. Make certain of flow
direction at the same time.
8.3 Leak Check
Fill the sensor tube completely with process fluid and check for any leak from connections.
8.4 Supplying the Power
Upon completion of checks for correct wiring connections, supply power. The LCD will show the following
information:
Corporate logo is shown.
Self diagnostics begins.
If nothing unusual is found, "OK" appears at right of
each item, bringing up the next window.
(If NG appears, running a check on that item is
required.
See 9.6.3 Transmitter Check, correct the condition, and
turn on power again.)
Variable view and measurement begins.
8.5 Measurement Line Startup
By starting up the pump, opening valves, etc., carefully allow the process fluid to flow.
8.6 Warm-up
To ensure stability of the measuring conditions of equipment, provide about 20 minutes, warmup period.
(A message "WARMUP 20" stays on after startup. The number shows remaining time (min).)
8.7 Zeroing Procedure
On seeing that the measuring conditions have come to an equilibrium, shut off the downstream valve
completely. Make a zeroing adjustment under these conditions (see the topic under 9.8 Zeroing).
8.8 Readying for Operation
Now preparation for operation is complete. Initiate measurement.
29
L-737-3-E
①
②
③
9. DESCRIPTION OF INCORPORATED FUNCTIONS
9.1 Display
9.1.1 Description of display
RED LED LED GRN LED
"ENT" switch"SEL" switch
(1) LCD top row (①)
Shows measurements. Other variables also can be shown with switches. (An example at above shows
instant mass flowrate and instant volume flowrate. For details of displayed variables, see 9.1.3 View
variables.)
(2) LCD middle row (②)
Shows an error / status message.
For error messages, see 10.1 Error Messages and 10.2 Status Messages. If more than two messages
exist, they are shown one after another.
(3) LCD bottom row (③)
In the view variables screen, an arrow appears, pointing to the direction of scroll. By reversing the
arrow direction, you can reverse the direction of scroll. (For details, see 9.1.3 View variables.)
A black circle ● may blink on and off at right of arrow. (It indicates that the number of running hours
has exceeded 100,000. For necessary treatment, see 10.2 Status Messages.)
(4) Red LED and green LED
Similar to messages, these LED show the status of flowmeter.
In normal operation, red LED stays off; green LED stays on.
Anything else is indicative of occurrence of something erratic.
See 10.1 Error Messages and 10.2 Status Messages.
(5) "SEL" and "ENT" switches
An infrared switch. Responds to a finger held close to it.
For operating procedure, see 9.1.2 Switch operation.
NOTE:
If the infrared sensors do not respond sufficiently, use LinkTop to adjust the sensitivity.
In case you do not have LinkTop, use a reflecting subject, such as a sheet of paper,
to operate the switches.
30
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