HD2305.0
- 15 -
V1.6
4
WIRE
Pt100
AND
2
WIRE
Pt1000
T
EMPERATURE
P
ROBES
The instrument accepts the input of Platinum 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 or-
der 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 in-
put 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 con-
figuration is required (please see the description of the Probe Type menu).
Temperature measurement
The response time for the measurement of the temperature in
air
is greatly reduced if the air is mov-
ing. If the air is still, stir the probe. Please remember that the response times in any case are longer
than those for liquid measurements.
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 module for the 4 wire Pt100 and 2 wire Pt1000 probes
All probes produced by Delta OHM are provided with a TP47 module.
The HD2305.0 instrument also work with direct 4 wire Pt100, and 2 wire Pt1000 probes manufac-
tured 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 DeltaOHM HD2305.0
Page 4: ...HD2305 0 4 V1 6 pH meter Thermometer HD2305 0...
Page 27: ......
