Tecfluid MC-01 - Manual (Page 10)

Cod:E-MI-2151061 I Rev:1
10
6.2 Change of units of measurement
In some cases we need to change the measurement units for batching, for example, instead of
working in litres we need to work in kilograms. In this case we will need to know the density of the liquid (ρ).
To change from litres to kg we must divide the pulse per litre factor by the density of the liquid to
obtain the new factor for programming the MC-01. For example, if the liquid has a density of 0.9 and the
flowmeter gives us 200 pulses per litre and we must batch in kg; we will program the MC-01 using 222.222
as the new "Factor I/L" to be able to preset directly in kg.
Fnd
= Factor pulses per litre for the new density
F = Original factor for pulses per litre
ρ = Density of the liquid in kg/litre
7 TECHNICAL CHARACTERISTICS
7.1 Power supply
The standard mains voltages for the MC-01 are 240 V, 220 V, 110 V, 24 V AC - 50/60 Hz. The
mains voltage must be specified on ordering.
On special order supply voltages of 12 or 24 V DC can be supplied.
The MC-01 consumes less than 3 VA with AC mains supply.
Fuse : 250 mA slow (T)
7.2 Signal Inputs
The MC-01 is designed to accept two types of inputs; on ordering the type must be specified given
that there are differences between the two types.
1. The type of input called "COVOL" is designed to work with an electrical contact which
closes its circuit between the terminals Nº1 and Nº2 of the input connector. Given that this type of
input tends to be very slow, and in order to avoid bounce effects of the contacts, the input frequency
is limited to about 200 pulses per second.
2. The type of input called "TM-44" is designed to work with an inductive pick-up with a coil,
connected to terminals Nº2 and Nº3 of the input connector. The input frequency is limited to about
1900 pulses per second.
ρ
F
= F
nd