Yokogawa Button Operated DX2000 Manual do Utilizador descarregar pdf (Página 7)

2.3. Alarm

Alarm types in LOG input mode

¾ H, L, T, and t only.

Set the alarm value using a voltage.

Computing method of alarm values

¾ Computing equation of the digital display value

From Y = 10

(SU-SL)*(X-VL)/(VU-VL)+SL

logY = (SU-SL)*(X-VL)/(VU-VL)+SL

X = (logY-SL)*(VU-VL)/(SU-SL)+VL

¾ For a computation example, see Table 2-2.

Alarm hysteresis fixed to 0%.

¾ The alarm hysteresis settings specified in the basic setting mode for the

measurement channel are invalid.

Table 2-2 Computation Example of Alarm Values

Alarm Value Span

Lower

Span

Upper

Lower Limit

of Exponent

Upper Limit of

Exponent

Equivalent

Display

Voltage

Equivalent

1 5 2 8 5.0E+6 4.133

1 5 2 8 1.0E+6 3.667

1 2 3 4 5 6 7 8 9 10 11 12 ... 20 21

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