Parameter input illustration. Gönnheimer D 122 Z.0, D 122 Z, D 122 Z.3, D 122 Z.5

D 122.Z 4 Manual Page 14

4.4 Parameter input illustration

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Prescale factor determination (I-fac)

The totalizer D122.Z adds the measured values to a sum and displays it. The measured value always refers to second, so it is possible to sum short count events. Recording for a long time the sum gets considerable bigger as the dimension of the present value.

To adjust the summation to each application, a prescale factor (I-fac) divides the sum to the desired range. Using the prescale factor it is possible to adjustthe dimension of the instantaneous value to the desired dimension of the sum. The prescale factor V is defined by

V = desired dimension of sum / dimension of the measured value or

V

=

E

M

E

S s

Example: An measuring transductor has an output-signal with the dimension g/min. The sum should have the dimension kg. The right prescale factor is

V

= kg

=

1000 g g min

⋅

1 g

60 s

⋅

=

60 000 6 10

4

=

E

According to this example the prescale factor V changes to 1000 (1E3) for a transductor signal with the dimension g/s, respectively 3600 000 (36E5) for a transductor signal with the dimension g/h.

The format of the prescale factor V is the exponent notation, i.e. the figures in front of the zeros of V lie by the exponent notation in front of the „E“ and the quantity of the zeros lie behind the „E“.

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Creep suppression (StArt)

In some cases, it will be necessary to ignore a transductor signal above 4 mA. This threshold level is named creep suppression value. The figure on the right hand shows its function.

Edit the creep suppression value in the total menu.

Term of the sum

Curve using creep supp.

Curve using offset measurement value creep supression value

Figure 3: Creep suppression

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