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Toshiba – Toshiba LF494 User Manual

Page 57

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TOSHIBA

6 F 8 A 0 7 7 4

(2) Span (riinf>e)

■ Span can be set and dLsplayed as follows for flow velocity and flow' rates:

• Flow velocity: 01,0DD nVs (three digits after the decimal point)
• flow' rales:

2.83E-I-3 m^H (three digits and exponential)

■ Valid range of span is 0.1 m/s to 10 ra^s in Unns of flow velocity.

If yon try to set the span outside of this range, one of the following messages appears:

* H, OVER SPEC, (if the set value exceeds 10 nVs)

* L. OVER SPEC, (if the set value is less than 0.1 m/s)

Try again to set the span within the specified range.

■ When

multiple ranges are

used, the

following must be observed;

• Range 1 > Range

2 >

Range 3 > Range 4 (unidirectional flow-, multiple ranges)

• Range 1 > Range 2, Range 3 > Range 4 (bidirectional flows^ multiple ranges)

If you try to set the ranges not conforming to I he above, the following message

appears;

t MULTI RNG ERR

Try again to set the ranges as specified above.

■ Totalization counting rale

If you have changed the span while the couniing rale is set for totalization^ the

counting rate for

100

% output may have exceeded the maximum couniing capacity.

[n this kind of evenu the following message appears and the system goes to the

counting rate setting sequence.

i K OVER C RATE or L. OVER C RATE

Set the counting rale (See 8.2.1 O^Counting Ratc"’)for the newly set span.

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