HD2303
- 19 -
V1.6
D
IRECT INPUT
Pt100
AND
Pt1000
T
EMPERATURE PROBES
The instrument accepts the input of P
latinum temperature probes with resistances of 100Ω (Pt100)
and 1000Ω (Pt1000).
The Pt100 are connected to 4 wires, the Pt1000 to 2 wires; the excitation current was chosen in
order to minimize the sensor self-heating effects.
All probes with SICRAM module are calibrated in the factory; the 2 or 4 wire probes with direct
input are
checked for conformity with class A tolerance
according to norm IEC751 - BS1904 -
DIN43760.
For the temperature probes without SICRAM module (Pt100 4 wires, and Pt1000) the model
configuration is required (please see the description of the Probe Type menu).
Temperature measurement
The temperature measurement by
immersion
is carried out by inserting the probe in the liquid for at
least 60 mm; the sensor is housed in the end part of the probe.
In the temperature measurement by
penetration
the probe tip must be inserted to a depth of at least
60 mm, the sensor is housed in the end part of the probe.
NOTE:
when measuring the temperature on frozen blocks it is convenient to use a mechanical tool
to bore a cavity in which to insert the tip probe.
In order to perform a correct
contact
measurement, the measurement surface must be even and
smooth, and the probe must be perpendicular to the measurement plane.
So as to obtain the correct measurement, the insertion of a drop of oil or heat-conductive
paste between the surface and the probe is useful (do not use water or solvents). This method
also improves the response time.
Connecting the TP47 connector for 4 wire Pt100, Pt1000 and Ni1000 probes
All probes produced by Delta OHM are provided with a connector.
The
HD2303.0
instrument also work with direct 4 wire Pt100, and 2 wire Pt1000 probes
manufactured by other producers: for the instrument connection is prescribed the
TP47
connector to
which the probe's wires should be welded.
The instructions to connect the Platinum probe to the TP47 module are provided below. The
TP47
module is supplied complete with fairlead and gasket for 5 mm maximum diameter cables. Do the
following to open the module and connect a probe:
1.
unscrew the fairlead;
2.
extract the gasket;
3.
remove the label using a cutter;
4.
unscrew the ring on the opposite side as illustrated in the figure:
Summary of Contents for Delta OHM HD2303.0
Page 4: ...HD2303 4 V1 6 Anemometer HD2303 0 ...
Page 15: ...HD2303 15 V1 6 AP471S4 ...
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