Fema Electronica M40-P, User Manual

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FEMA ELECTRÓNICA . Series M . M40-P
10
On power-up
Delay
Tare
Seconds
Tools
1.10 Configuration menu (cont.)
The ‘ On Power Up ’ (‘ on.Pu ’) menu configures functions to apply at
start-up. It applies only to instrument restart after power loss. It does
not apply to instrument restart due to change in configuration.
• parameter ‘ Delay ’ (‘ dLAy ’) assigns a waiting time in seconds. The
instrument waits the configured time before starting normal func-
tion. During this waiting time, the display shows all decimal points
on in flash mode, all alarms are in ‘oFF’ state, there is no signal acqui-
sition and there is no communications or control being performed.
After the configured time is over, the instrument starts in normal
function. Delay value between 0 and 200 seconds.
Application - the start-up process for an automation system implies
that different parts of the system (engines, actuators, controllers, ...)
have different start-up times. The ‘Delay’ function gives time to the
instrument to wait until the slowest part of the system is fully func-
tional before executing actions on the system (signal reading, relay
activation, ...)
• the ‘ Tare ’ (‘ tArE ’) functions allow to activate an automatic tare of
the reading each time the instrument is restarted. See section 1.10.9
for more information on the ‘tare’ function.
1.10.8 Menu ‘On Power Up’
The ‘ Tare function ’ (‘ tArE ’) menu allows to operate the instrument
for load-cell and weight applications. The tare function assigns the
actual input signal value to a reading of ‘0’ Kilos, by adding an inter-
nal offset. It does not modify the scaling parameters of the instru-
ment.
The ‘Tare’ function can be applied pressing button ‘LE’ (
3
) at the
front keypad (see section 1.10.10). The offset value is eligible for visu-
alization through the ‘Fast access’ menu (see section 1.10.6).
To work with load-cell applications it is important to first adjust the
scaling of the instrument to the load-cell used.
Application - A load cell with 2 mV/V parameter, powered at 10 Vdc,
with nominal weight of 500 Kilos, together with a signal converter
that provides 4/20 mA signals for a 0/20 mV signal from the load-cell.
The scaling to configure at the meter is 4/20 mA = 0/500.0 Kilos. Once
the meter is scaled, the tare function can be used to ‘tare’ the reading
to 0 Kilos.
• at the ‘ Reset ’ (‘ rSt ’) menu select ‘ yES ’ to reset the tare offset value
in memory.
1.10.9 Menu ‘Tare function’
Tare function Reset
Key LE
Tare
Alarm unlock
No function
1.10.10 Menu ‘Key LE’
The ‘LE’ (
3
) key at the front of the instrument can be configured to
activate several functions. Only one function can be assigned to the
‘LE’ (
3
) key
• the ‘ No function ’ (‘ nonE ’) value assigns no function.
• the ‘ Tare ’ (‘ Tare ’) value assigns a tare function (see section 1.10.9).
• the ‘ Alarm unlock ’ (‘ A.Lck ’) value assigns the manual unlock of the
alarms function, for instruments with the ‘ Locked alarms ’ (‘ A.Lck ’)
function activated (see section 1.10.3)