Fema C Series, User Manual, Page: 12 / 32

FEMA ELECTRÓNICA . Series C . C40-D
12
Ranges
of measure
Scale
by default
Scalable
Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Accuracy
(% of reading)
0 to 5 K 5.000
from 9999
to -1999
F H K
4-5
<1.5% of
reading
0 to 50 K 50.00 F K
Table 17 - Ranges of measure for resistances
• Measuring resistive signals
The instrument accepts the measure of resistances and
provides two ranges of measure from 0 to 5 K and from
0 to 50 K.
•
Compensating the resistance of the signal wire
Resistances are measured with 2 wires system. To compensate for
the possible error introduced by the resistance of the signal wires,
the instrument allows to configure a fixed number of counts to be
added to the reading, both in positive or negative. This is done with
the parameter ‘
Offset reading
’ (‘
oFFS
’)
(see section 1.22).
• Scaling
The instrument allows to scale the reading to 4 digits (9999 / -1999)
with configurable decimal point to any position. The ‘
second scaling
’
function can also be used
(see section 1.25).
1.18 Measuring resistances
• Response times
The response time to a signal step is 300 mSeconds, independent of
the signal range selected.
• Terminal 5 ‘multifunction’ - External control
Terminal 5 remains configured as ‘EK’ external control function. See
section
1.9
for a list of available functions.
•
Start-up, connections and jumpers
For instrument start-up follow the steps listed at section
1.7
. Signal
connections are indicated at section
1.5.
Location for internal jump -
ers is indicated at section
1.9.
See below connections for resistance measures :
res +
res -
1 2 3 4 5
Nominal
pot. value
Ranges
of measure
Scale
by default
Scalable
Jumper ‘S’
(see section 1.9)
Jumper ‘T’
(see section 1.9)
Accuracy
(% FS)
from 500 R
up to 20 K
0 to 100 % 0/100.0
from 9999
to -1999
A 2-3 <0.5%
Table 18 - Ranges of measure for potentiometers
• Measuring potentiometers
The instrument accepts the measure of 3 wire potenti -
ometers, with a single default range of 0/100 % of the
potentiometer span.
• Scaling
The instrument allows to scale the reading to 4 digits (9999 / -1999)
with configurable .
• Response times
The response time to a signal step is 300 mSeconds, independent of
the signal range selected.
• Terminal 5 ‘multifunction’ - ‘Vexc’
To measure potentiometer signals, set internal jumper ‘T’ at position
2-3 (see section 1.9). Terminal 5 will be assigned to a +5 Vdc excita -
tion voltage for the potentiometer.
1.19 Measuring potentiometers
• Start-up, connections and jumpers
For instrument start-up follow the steps listed at section
1.7
. Signal
connections are indicated at section
1.5.
Location for internal jump -
ers is indicated at section
1.9.
See below connections for measure of potentiometers ::
Signal
Pot- (comm.)
Pot+ (5 Vdc)
1 2 3 4 5