Toshiba TIC-LF494B Manual De Usuario

TIC-LF494B

Specifications

Overall Specifications
Measurement range in terms of flow velocity:

–1.0

ft/s to 0

–

32.8

ft/s (0

–

0.3

m/s to 0

–10

m/s)

–

0.3

ft/s to 0

–

1.0

ft/s (0

–

0.1

m/s to 0

–

0.3

m/s)

range is available optionally.

Accuracy:

0.2 % of Rate

* This pulse output error result is established under standard

operating conditions at Toshiba's flow calibration facility,
Fuchu Japan. (NIST Traceable).

* Individual meter measurement error may vary up to ±0.5% of

Rate at 1.64 ft/s (0.5m/s) or more and ±0.3% of rate ±0.039
inch/s (1mm/s) at 1.64ft/s (0.5 m/s) or less.

* Current output: plus ± 8µA (0.05% of span.)

*Refer to individual calibration data for each individual meter's

measurement error.

Fluid conductivity

: 5µS/cm minimum

Fluid temperature:

14 to 248

°F (–10 to +120 °C)

Ambient temperature: – 4 to 140

°F (–20 to +60 °C)

Structure: IP 67 and NEMA 4X Watertight
Power consumption:

17 W(27VA) or less
19 W(29VA) or less (with PROFIBUS)

Conformance to European Community Directives:

EMC directive 89/336/EEC
The low voltage 93/68/EEC

3A standard (LF490 and LF494 detectors):

Approved for 3A standard with FDA approved

Teflon PFA lining.

Approved hazardous location certifications:

Model: LF494/LF610F and LF494/LF612F

cFMus explosion proof:

FM Class I, Division 2, Groups A,B,C, and D.

FM Class II, Division 2, Groups E, F and G.

FM Class III.

Detector and converter combination:

LF490/LF610 : Combined type for standard

specification.

LF490/LF612 : Separate type for standard

specification.

LF494/LF610F: Combined type with Ex approval

of Class I, Division 2 (cFMus).

LF494/LF612F: Separate type with Ex approval

of Class I, Division 2 (cFMus).

Mount-Anywhere

Technology:

Thanks to TOSHIBA’s unique patented magnetic
field distribution technology, the meter is highly
immune to upstream flow disturbances.
A minimum of 1D (diameter) length of upstream
straight pipe from the flange is required to
maintain the performance specification.

Note : The test results were obtained and demonstrated at

TOSHIBA's flow calibration facility, Fuchu Japan.

Model LF490 and LF494 Detectors

Fluid pressure:

–15 to 300 psi, or –1.0 to 20 bar (–0.1 to 2.0 MPa)

Note: This pressure is the allowable pressure for the

detector. The actual pressure will be restricted by

the type of connection method. For example, in

the case of sanitary clamp type, the maximum

pressure is 150 psi or 10 bar(1.0 MPa).

Note: The test pressure before shipping from the

factory is equal to twice the nominal pressure

rating of the customer specified flange

connection during 15 minutes.

Connection method:

Sanitary clamp type (ISO 2852)

Note:
Tri-clamp® can connect except meter size 4" (100 mm).

Tri-clamp® is a registered trademark for Tri-Clover Inc.

Principal materials:

Case — stainless steel
Linings — Teflon PFA (FDA approved)

Note: Teflon liners are mechanically retained for

full vacuum service.

Electrodes — 316L stainless steel (std.)

Note: Electrodes are electro-chemically polished

after mechanically buffed.

Sanitary fittings — 304 stainless steel (std.)
Seal gaskets — Silicon rubber (FDA approved)

Note: See Table 5 for optional materials and other

related information.

Measuring tube material — 304 stainless steel

Coating: no coating (std.)
Dimensions and weights: See Figures 3 to 6.
Cable connection port: for separate type detectors.

Cable glands —

LF490: Provided as standard, R(PT) 1/2

male screws.

LF494: Not provided, 3/4–14NPT male

screws are required.

Applicable diameter —

0.433 to 0.512 inch (11 to 13mm)