Fema M Series, User Manual, Page: 8 / 36

FEMA ELECTRÓNICA . SERIES M . M60-LC
8
Included functions Section
Function tare yes 1.11
Auto-tare automatic zero tare 1.12.4
Maximum tare
to prevent undesired
tare activations
1.12.7
Scale factor
change the reading
scale
1.12.5
1.12.7
Stock of units
counts units instead of
weight
1.12.6
Modes
high rejection to 50 Hz
and 60 Hz
1.9.1
Alarms
standard
stability alarms
double setpoint
activation delays
deactivation delays
hysteresis
inverted relay
locked deactivation
1.12.8
Display filters
fixed digits
recursive
‘steps’
left zeros
1.12.10
Rear controls
activate functions from
rear terminal
1.12.11
Front key ‘LE’ (
3
)
activate functions from
key ‘LE’ (
3
)
1.12.12
Fast access (key ‘UP’ (
5
))
fast access to param -
eters from front key
‘UP’ (
5
)
1.12.13
On power up
activate functions at
power up
1.12.14
Memory maximum and minimum 1.12.13
Password
blocks access to configu-
ration menu
1.12.17
Troubleshooting func-
tions
values for input signal,
excitation voltage and
excitation current
1.9.3
1.12.13
Display brightness 5 levels 1.12.17
Table 4 - Functions included
1.10 Included functions 1.11 ‘Tare’ functions included
Activate the tare function to force the instrument to take the
actual signal as a ‘0’ weight. The tare function does not mod -
ify the internal calibration of the cell, and can be activated as
many times as needed. The tare function is typically used to
set a ‘0’ reading when a fixed weight has been added to the
load cell.
Example : a truck enters a loading area and is placed on a
weighing system. The instrument indicates that the weight of
the truck is 2.500 Kg. A tare is applied to the instrument, and
now the reading is 0 Kg. The truck enters the loading area
and when it leaves, it is placed on the weighing system again.
Now the reading is 1.550 Kg. This is the weight of the mate-
rial loaded on the truck. When the truck leaves the weighing
system the instrument reads -2.500 Kg. Activate a tare again
to force a reading of 0 Kg or wait for a new truck.
The instrument accepts different ways to activate the tare
function:
• from the rear terminal, shortcircuit the ‘EK’ terminal against
the ‘Vexc-’ terminal. Previously, configure the ‘EK’ terminal
with the tare function
(see section 1.12.11) .
• from the front keypad, press the front key ‘LE’ (
3
). Previ -
ously, configure the ‘LE’ (
3
) key with the tare function
(see
section 1.12.12) .
• automatically when the instrument starts. Previously, con -
figure the ‘on power up’ function with the tare function
(see
section 1.12.14) .
• automatically with the ‘auto-tare’ function. The inherent
mechanical characteristics of a load cell makes the ‘zero
weight’ signal a non constant value. This can be detected
by placing and removing the same weight from a load cell,
several times. When the weight is removed, the reading is
not always ‘0’, but a random value close and around ‘0’. The
‘auto-tare’ function automates the activation of the ‘tare’
when the reading of the instrument is stable and close to ‘0’
(see section 1.12.14) .
To avoid accidental tares, the instrument provides the ‘ Max.
Tare ’ (‘ MAX.t ’) parameter. The activation of the ‘tare’ func -
tion, either manual or automatic, is not applied if the reading
is higher than the value defined in this parameter
(see section
1.12.7)
.
The actual tare value can be accessed from the front key ‘UP’
(
5
) activating the ‘Tare’ function at the ‘Key UP’ menu
(see
section 1.12.15)
. A reset to the tare value can be applied also
from this same menu.