Azbil MagneW Two-wire PLUS+ MTG15A, User Manual

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5-45
5-6-8. Setting pulse scale
This function is used to set the flow rate per pulse and associated units for a flowmeter.
Pulse scale of the totalization value indicated on the display is equal to the pulse scale set here.
Set range: 0.0001 to 99999.
However, the pulse scale should be set so that the pulse output span frequency fs (shown in
the auxiliary display) is between 0.0001 Hz and 200 Hz.
0.0001 Hz ≤ fs ≤ 200 Hz
Units of flow rate:
Unit of SI volume flow rate:
m 3 , 1, cm 3
Unit of SI mass flow rate: t, kg, g
Unit of non-SI volume flow rate: mG, G, kG, B, mIG, IG, kIG
Unit of SI mass flow rate:
lb
Unit of time: d, h, min., s
Default: 10.000 m 3 /P
Note) Select the same unit systems (volume unit or mass unit) for the flow rate range and pulse
scale. Selection of different unit systems for them will cause set errors (Err-22 PULSE
WEIGHT SETTING ERROR). (See page 5-73 .)
Calculation method of span frequency:
Span frequency fs can be calculated by the following formula:
fs = (Flow rate range)/(Pulse scale)
To calculate fs, pay attention to the following points:
* Convert flow range into the range per second.
* Select the same unit of flow rate for flow rate range and pulse scale.
Example)When flow rate range: 60 l/min., and pulse scale: 10 cm
3 /P:
1. Convert the flow rate range into the flow rate range per second.
60 l/min.

60/60 l/s
= 1 l/s
2. Select the same unit of flow rate for flow rate range and pulse scale.
In this example, the unit of pulse scale is changed.
10 cm 3 /P

10/1000 l/P
= 0.01 l/P
3. Calculate the span frequency.
(1 l/P) / (0.01 l/P)
= 100 Hz
fs = 100 Hz