Toshiba LF502 - Manual (Page 3)

TIC-LF502A
3
independently)
In the case of DO1
Pulse rate: 3.6 to 3,600,000 pulses/h
Pulse width:Settable within the range of 0.3 to
500ms
In the case of DO2
Pulse rate: 3.6 to 360,000 pulses/h
Pulse width: Settable within the range of 4 to
500ms
• Rage switching output
One Digital Output (DO) is used
Single direction, 2-range switching signal
Forward/reverse direction switching signal
Two Digital Outputs (DO) are used
Single direction, 4-range switching signals
Forward/reverse 2-range switching signals
• High/low limit alarm output
An alarm is output when flow rate goes above or
below the set-point value
Setting range : -10 to 110% of the settable
maximum range
High limit 2 points, low limit 2 points can be set
At the time of alarm output, Normally Open or
Normally Closed contact can be selected
• Preset point output
Contact ON when totalizer count exceeds the set
value
Setting range: 1 to 99999999 count
• Converter error alarm
An alarm is output when an operation error is
detected by self-diagnosis.
At the time of alarm output, Normally Open or
Normally Closed contact can be selected
Communications signal:
A digital communications (HART protocol) signal is
superimposed on 4 to 20 mA dc analog output signal.
Load resistance: 240 Ω to 1 kΩ
Load capacitance: 0.25 µF or less
Load inductance: 4mH or less
(For maximum cable length, about 2km is a
guideline length when CVV-S 1.25mm
2 is used
under standard installation condition.)
Note: HART (Highway Addressable Remote
Trans-ducer) is a communications protocol for
industrial sensors recommended by the HCF
(HART Commu-nication Foundation).
Output display:
16-character×2-line dot-matrix LCD
(With back light).
2 units can be selected from the flowing units: flow
velocity, instantaneous flow rate, total flow
(forward/reverse/difference flow), total count, %,
custom unit.
Parameter settings—Parameters can be set as follows
•IR Switches: Various parameters can be set without
opening the converter housing using 4 infrared
switches (password can be set)
•Zero adjustment: Zero point adjustment can be
started by pressing the switch in the converter.
•Digital communication: The AF 900 hand-held
terminal is needed to set parameters.
•Damping: 0.5 to 60 s
(Selectable in one second increments)
“Field re-verification” Mag-Prover – 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 output and
display will stay as follows when power fails..
Current output: 0 mA
Digital output : OFF (contact open)
LCD display : No display
Surge protection: Surge protectors are installed in the
power supply, excitation circuit, current signal
output and digital I/O circuit.
Terminal block structure:21-pole, screw connection
type (M4 screw)
Housing: Aluminum alloy
Coating: Acrylic resin-baked coating, pearl-gray
colored
Cable connection ports :
A cable gland is provided for each port.
OD of cable φ11 to 13 mm
Material Nylon 66
G(PF) 1/2 male screws.
Structure: IP67 and NEMA 4X Watertight
Vibration resistance:
No resonance to the following levels of vibration:
• 10 to 55Hz with amplitude of 0.07mm,
• Vibration of 30Hz with 29.4 m/s 2 in 4h in each
direction will not cause any defect to unit.
Note: Avoid using the flowmeter in an environment
with constant vibration.
Dimension and Weights:
See Figure 5