Toshiba LF470/LF612 规格说明表单

 TIC-LF470B 

 

2

 

Fluid pressure: -15 to 150 psi, or -1.0 to 10 bar   

(-0.1 to 1 MPa) 

Principal materials: 

Measurement tube – Alumina ceramics 
Electrodes – Platinum 
Pipe connection port: 

Standard – 316 stainless steel 

Option  – Ti (titanium), 

Polyvinyl chloride (shock-resistant)+ 
Ta (Tantalum) for grounding plate, 
Polyvinyl chloride (shock-resistant)+ 
Pt-Ir grounding plate, 
Hastelloy C (Equivalent) 

Dedicated preformed cables: 

･

Signal cable

 

– 2-wire shielded chloroprene 

sheathed cable 

                      Overall length: 0.28 inch (7mm) 
           Length: 0.20 inch (5m) 

･

Excitation cable – 3-wiren chloroprene sheathed 

cable 

Overall length: 0.28 inch (7mm) 

  Length: 

0.20 inch (5m)

Coating:  phthalic acid resin coating pearl-gray 

colored 

Weight: approximately 2.2 lb (1.0 kg)   

                (for each size excluding cables) 

 

Input signals 

Analog signal — the voltage signal from detector, 

proportional to process flow rate (for LF612 

separate type converter). 

Signal type:    20 to 30Vdc voltage signal 

Input resistance: 2.7k

Ω 

Number of inputs: one point 

DI function — One of the following functions can be 

assigned to the optional DI signal. 

Range switching — Selects either the higher or lower 

range in the unidirectional or bidirectional 2-range 

setting. 

Totalizer control — Starts and stops the built-in 

totalizer. 

Fixed-value outputs —Outputs fixed-values for 

current and pulse outputs. 

Zero adjustment — Executes zero adjustment 

(on-stream at zero flow rate). 

4–20mAdc (load resistance 0 to 750

Ω) 

Note: The current output cannot be used with the 

PROFIBUS-PA communication. 

Digital outputs — One point (std.) and one more 

point is optionally available as follows. 

Output type: Transistor open collector 
Number of outputs: One point 
Output capacity: 30Vdc, 200mA maximum 

Output type:   

Solid-state relay output (non polarity) 

Number of outputs: One point 
Output capacity: 150Vdc, 150mA maximum   

or 150Vac (peak to peak), 100mA maximum 

DO1 and DO2 functions — One of the following 

functions can be assigned to DO1 (std.) and/or 
DO2 (opt.) 

• Pulse output (available only for DO1, DO2) 

Pulse rate: 3.6 to 36,000,000 pulses/hr (DO1) 

3.6 to 360,000 pulses/hr (DO2) 

(Over 3,600,000 pulses/hr, auto-setting) 

Pulse width: 0.5 to 500ms (but less than half of 
the period for 100% flow rate) 

Note: The same and simultaneous   pulse is not 

available between DO1 and DO2.) 

• Multi-range selection outputs (Note 1) 
• High, High high, Low, and/or Low low alarm 

• Empty pipe alarm output 
• Digital Output Active Status (DO1 and DO2) 

Note 1: Two outputs (DO1 and DO2) are needed for 

4-range switching and forward/reverse 2-range 
switching. 

Note 2:Normal Open (default set) or Normal Close is 

selected for alarm outputs when programming. 

When power failure occurs, unit will be fault to 
Normal Open.