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14
DP20 Economical Multisignal Meter
Instruction Manual
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 15 - 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 1.21).
•
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 1.24).
1.18 Measures of resistance
•
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
jumpers 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 16 - Ranges of measure for potentiometers
• Measuring potentiometers
The instrument accepts the measure of 3 wire
potentiometers, 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 excitation
voltage for the potentiometer.
1.19 Measures of 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
jumpers is indicated at section 1.9.
See below connections for measure of potentiometers ::
Signal
Pot- (comm.)
Pot+ (5 Vdc)
1 2 3 4 5