Download Print this page

Toshiba LF434 /LF620 Manual page 4

Electromagnetic flowmeter
Hide thumbs Also See for LF434 /LF620:

Advertisement

TIC-LF434H
Data length : 8bit
Parity bit : None, Odd, Even
Stop bit : 1bit, 2bit
Error check : CRC-16
Max. station number : 32(with Master device)
Max. cable length : 1.2km (Note)
Note: This length is specification of 3 line
connection.
LCD display:
Full dot-matrix 128×128 dot LCD display
(back–light provided)
The data on the LCD inside the converter can rotate
to 90, 180, and 270 degrees by a software, without
rotating the indicator itself. (Combined type only)
Parameter settings — Parameters can be set as
follows:
• IR Switches: Three key switches are provided
to set configuration parameters.
• Digital communication: The AF900 hand-held
terminal or PROFIBUS is needed to set
parameters.
• Zero adjustment: Zero point adjustment can
be started by pressing the switch in the
converter.
• Damping: 0.5 to 60 seconds (selectable in one
second increments)
"Field re-verification"
Toshiba's Zero span calibration tool allows
unit to be re-calibrated and verified using an
internal software program (For more
information contact Toshiba International
Corp.)
Conditions when power fails:
Parameter setting values are stored in non–volatile
memory and the values will be restored when the
power returns to normal condition. The outputs and
display will remain as follows when power fails.
• Current output: 0mAdc
• Digital output: OFF
• LCD display:
• HART:
• PROFIBUS:
• Modbus:
Power supply:
One of the following can be selected:
• 100 to 240Vac, 50/60Hz (std.)
(allowable voltage 80 to 264Vac)
• 24Vdc (allowable voltage 18 to 36Vdc)
• 110Vdc (allowable voltage 90 to 130Vdc)
Surge protection:
Arresters are installed in the power supply and a
4
Mag-Prover
No display
No communication
No communication
No communication
current signal output circuit to help protect the meter
from lightning and improve personnel safety.
Case: Aluminum alloy (equal to IP 67)
Coating:
Acrylic resin-baked coating, pearl–gray colored
Cable connection port:
Cable glands —
LF620 and LF622 without cFMus Approval:
Provided as standard, Outer Diameter of cable
φ11~13mm
Material Nylon 66
G (PF) 1/2 male screws.
LF620F and LF622F with cFMus Approval:
Not provided, 1/2–14NPT male screws are
required.
Applicable diameter —
0.433 to 0.512 inch (11 to 13mm)
Note: When PROFIBUS option is specified, cable gland size is
φ6~8mm for signal cable, φ11~13mm for power
cable
Vibration resistance:
No resonance to the following levels of vibration:
• 10 to 150Hz with acceleration of 9.8m/s
• Vibration of 30Hz with 29.4 m/s
direction will not cause any defect to unit.
Note: Avoid using the flowmeter in an environment with
constant vibration.
Dimensions and Weights
See Figure 5 (for Separate type)
MTBF:
Converter: 220,000 hours (25 years) at 77 °F (25 °C)
based on strict military specification
MIL-HDBK-217F
Detector: 350,000 hours (40 years) at 77 °F (25 °C)
based on strict military specification
MIL-HDBK-217F
PED matrix in each flange connection
The following sizes fall under the category for PED in
each flange connection when the meter ships to EU.
All of them had complied with it from a notified body.
Table1. PED matrix in each flange connection
Flange standard
DIN PN 16 and BS 16
DIN PN 10 and BS 10
ANSI 150 and JIS10K
Note: Hard rubber lined flowmeter had not complied with PED
2
2
in 4h in each
:
Meter size
150 to 400mm
(6 to 16 inch)
250 to 400mm
(10 to 16 inch)
6 to 16 inch
(150 to 400mm)

Advertisement

loading