YOKOGAWA US300FM User Manual
User’s
Manual
US300FM
Ultrasonic Flowmeter
Manual Change
No. 15-010-E
This is the supplement for the original manual (No. IM 01G05B03-01E, 1st Edition) regarding the added and changed
items. Please also refer to this supplement when you read the manual.
Addition to the section “3.5.4 Connection of the Transducers” (page 18) :
(1) Cable Finish
The cable finish should be done as the drawings (a) and (b)
shown in the right.
(2) Cable Gland
When tightening the gland, not only pull back the cable shield
(meshed part) but also roll it out into a ring-shaped form and let
it be pushed by the compression part (grey-colored plastic) so
that the cable shield will have electrical contact with the gland
body. Also, be sure to align the convexity part outside the
compression part and the concavity part inside the gland body.
Refer to the drawings below.
Cable shield rolled out into a ring-shaped form
Compression part
(convexity part outside)
Components of the cable gland
Gland body
(concavity part inside)
(a) Main unit side
Perform
soldering
7±2
13±3
White White
60±5
12±2
Cable
shield
(meshed)
(*) Finish the brown cables as well as white cables.
(**) You do not connect the thin lines to any terminals.
Gland body
Cap nut
Rubber ring
Compression
part
Cutaway view of the cable gland
Unit : mm
Shield line
Brown (*)
Less
than
10mm
Thin lines
Outer skin of the cable
Cable shield
(ringed-shape)
Signal lines
(b) Junction box side
52±5
Cable
shield
(**)
(meshed)
Outer wall of
the main unit
or junction box
Perform
soldering
7±2
Shield line
10±3
12±2
(3) Grounding
The connection of the cable shield will be realized as shown in the drawing below after going through the
procedures (1) and (2) in the above. Connect the main unit to the ground through the terminal “PE” of the power
supply terminals in the main unit. The grounding resistance should be less than 100 ohm.
Transducers
Sensors
Junction box
Connection
cable
Main
unit
Grounding resistance
less than 100 ohm
GND
Connection of the cable shield
(4) Connecting the Sensor ROMs
Connect the sensor ROMs to the corresponding terminals in the main unit when connecting transducers. The
sensor ROMs are packed and affixed to the transducers when shipped from the factory.
Brown (*)
Less
than
5mm
Thin lines
(**)
Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
Yokogawa Electric Corporation
Changes to the section “3.1 Scope of Delivery” (page 11) :
Change the figure of a nameplate to as below.
Addition to the section “3.1 Scope of Delivery” (page 11) :
When ordering a couplant weatherproof type (by couplant code “R” in the transducer specification or model code
USPA097), a package of “Shin-Etsu Silicone, 1 COMPONENT RTV (KE45T)” is delivered.
Addition to the section “3.3 General Precautions” (page 12) :
・Do not disassemble or remodel.
Addition to the section “3.5.1 Location” (page 13) :
Attention!
The instrument must not be installed in a corrosive atmosphere.
Attention!
Use Submersible(IP68) type transducers when they are installed where condensation
occurs. A Tokuchu request is necessary for Submersible type. However the diameter
must be over 100 mm.
Changes to the section “3.5.5 Connection to the Power Supply” (page 20) :
(1) Terminal Block (page 19)
The outer shapes of the terminal block for
power supply connection, the printed
terminal names, and the design on the
board below the terminal block have been
changed as the drawing in the right.
(2) Terminal Assignment (page 21)
Regarding the terminal assignment, the
terminal names were revised as below
from the original manual. The needed
power supply is given in the nameplate on
the housing, not in the plate below the
terminal block.
N(-)PE L(+)
KL3
The terminal names are the
same both for AC and DC
power supply.
This can be used as the
earth terminal instead of
the terminal “PE”.
AC power supply DC power supply
Terminal Connection Terminal Connection
PE Earth PE (Earth)
N(-) Neutral N(-) - DC
L(+) Phase 100...230 V AC±10% L(+) + DC 24V DC±10%
Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
Addition to the section “3.5.5 Connection to the Power Supply” (page 20) :
Install an external switch or circuit breaker as a means to turn the power off (capacitance; 15A, conforming to
IEC947-1 and IEC947-3). Locate this switch either near the instrument or in other places facilitating easy
operation. Affix a “Power Off Equipment” label to this external switch or circuit breaker.
Changes to the section “3.6 Sensor ROM” (page 22) :
The sensor ROMs are packed and affixed to the transducers when shipped from the factory, not inserted to the
terminals in the main unit. They shall be connected to the corresponding terminals in the main unit when
installation.
Addition to the section “3.7 Replacement of the Fuse” (page 22) :
Be sure to use the fuse which satisfies the specification below.
Components may otherwise be damaged.
Changes to the section “3.7 Replacement of the Fuse” (page 22) :
Change the fuse specification “250V 1.25A, delayed action Type T” to as below.
“250V 1A delay type” for AC power supply
“250V 1.6A delay type” for DC power supply
Addition to the chapter “4. Getting Started” (page 23) :
Attention!
The current outputs may temporarily turn unstable during the power-on sequence
(including re-starting after power failure) and parameter display / setting mode. Take care
of your process not to be affected by this behavior.
Addition and deletion to the section “4.1.1 Key Operations” (page 23) and related pages :
Refer to the following table for the function of corresponding key operations.
The correct explanations for these key operations in the related pages are also as the table be low.
Related pages: “4.1.1 Interruption of Power Supply” (page 27)
“15.2 US300FM doesn’t react anymore” (page 106)
LIGHT
Switches the background lighting ON/OFF.
BRK
INIT
RESET
ENTER
[Operation when powering the instrument on]
[Operation during the measurement or menu display]
RESET: Press these three keys simultaneously to recover from an error. This
has the same effect as restarting the unit. Data will not be affected.
INIT (cold start): Press these three keys simultaneously and release ENTER
first. After acknowledging the display of main menu, release (i) BRK key
first and then (ii) C key. This will initialize the instrument. Most
parameters and settings are reset to the factory default values. The
memory will not be cleared.
Note that when the data logging function is activated, the DELETE
MEAS.VAL. display will appear instead of main menu. In this case, after
releasing (i) BRK key first and then (ii) C key, select NO or YES and then
press ENTER to finish the procedure.
BRK
INIT
INIT (coldstart): Pressing these two keys simultaneously and after acknowledging the
display of main menu, release (i) BRK first and then (ii) C. This will initialize the
instrument. Most parameters and settings are reset to the factory default values.
The same procedure is required as above when the DELETE MEAS.VAL. display
appears.
Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
Addition to the section “4.4.1 Interruption of Power Supply” (page 27) :
Attention!
The current outputs may temporarily turn unstable during the power-on sequence after
power failure. Take care of your process not to be affected by this behavior.
Addition to the chapter “5. Basic Measurement” (page 29) :
Note!
When changing any settings in "PARAMETER" program branch, be sure to also go
through "MEASURING" program branch to the end where the meas urement will start. In
this case, you do not always have to fix the transducers on to the pi pe, and thus you do
not always need to get the actual flow measurement.
If you shut off the power supply without taking this procedure, the settings to be c hang ed
would not be effective and keep the same settings as before.
Addition to the section “5.4 Selection of the Sound Path Factor” (page 34) :
When the pipe outer diameter is more than 600mm, the sound path factor as “1” (one) is recommended.
Otherwise, the measurement may become unstable when flow velocity or fluid temperature changed.
Addition to the section “5.5.2 Mounting of the Transducers” (page 35) :
The pipe wall thickness may slightly vary from part to part. Check it in advance by applying a wall thickness probe
or some other ways and avoid mounting the transducers on such parts.
Attention!
Instructions for using “Acoustic couplant weatherproof type” (Shin-Etsu Silicone, 1
COMPONENT RTV) are as below.
The operating condition of ambient temperature
Before and during curing : 0 to +50°C / 32 to 122°F
After curing : -40 to +180°C / -40 to 356°F
When applying this couplant, cut the tip of attached nozzle to appropriate length and
set it to the tube container. Also, remove matters like dust or oil on the surface to be
applied. Otherwise, its adhesion force may become lower.
When curing this couplant, keep the ambient and installation position temperature
between 0 to +50°C (32 to 122°F). If not, the flow measurement may fail because of
air bubbles formed inside the rubber before curing, etc.
It usually takes one to three days for complete curing depending on the conditions.
Addition to the section “5.5.2.2 Mounting with Fixtures and Chains” (page 36) :
Attention!
When using mounting fixtures, there may arise some air gap between the transducer
surface and pipe wall because of any distortion of the pipe wall. Make sure to avoid
having such air gap between them.
Addition to the section “6.1 Selection of the Physical Quantity and of the Unit of Measurement” (page 39) :
Attention!
In case of mass flow, select “Other Medium” as a measured fluid. When “ Other Medium”
has been selected, US300FM requests to enter the density which is us ed to calculate
mass flow.
Manual Change for IM 01G05B03-01E 1st Edition : No.15-010-E July 30 2015-00
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