HD2301
-
13
-
V1.7
D
I RECT I N PUT I N TO
Pt 1 0 0
AN D
Pt 1 0 0 0 T
EM PERATURE PROBES
The inst rum ent accept s t he input of Plat inum t em perat ure probes wit h resist ances of
100
Ω
( Pt 100) and 1000
Ω
( Pt 1000) .
The Pt 100 are connect ed t o 4 w ires, t he Pt 1000 t o 2 or 4 w ires; t he excit at ion current
was chosen in order t o m inim ize t he sensor self- heat ing effect s.
All probes wit h m odule are calibrat ed in t he fact ory, t he 2 or 4 wire probes wit h direct
input
a r e ch e ck e d for con for m it y w it h cla ss A t ole r a n ce
according t o norm
I EC751 - BS1904 - DI N43760.
The probes wit h SI CRAM m odule and t he Delt a Ohm Pt 1000 probes are det ect ed by
t he inst rum ent ; t he m odel configurat ion is required for t he ot her probes ( please see
t he descript ion of t he Probe Type m enu it em on page 9) .
T
EM PERATURE M EASU REM EN T
The t em perat ure m easurem ent
by im m e r sion
is carr ied out by insert ing t he probe in
t he liquid for at least 60 m m ; t he sensor is housed in t he end par t of t he probe.
I n t he t em perat ure m easurem ent
by pe ne t r a t ion
t he probe t ip m ust be insert ed t o a
dept h of at least 60 m m , t he sensor is housed in t he end part of t he probe.
N OTE
: when m easuring t he t em perat ure on frozen blocks it is convenient t o use a
m echanical t ool t o bore a cavit y in which t o insert t he t ip probe.
I n order t o perform a correct
con t a ct
m easurem ent , t he m easurem ent surface m ust
be even and sm oot h, and t he probe m ust be perpendicular t o t he m easurem ent plane.
So a s t o obt a in t he cor r e ct m e a sur e m e n t , t h e in se r t ion of a dr op of oil or
h e a t - con du ct iv e pa st e be t w e e n t he su r fa ce a n d t h e pr obe is use fu l ( do not
u se w a t e r or solve nt s) . Th is m e t h od a lso im pr ov e s t h e r e spon se t im e .
C
ON N ECTI N G TH E
TP4 7
CON N ECTOR FOR TH E
4 -
W I RE
Pt 1 0 0
AN D
2
OR
4 -
W I RE
Pt 1 0 0 0
PROBES
All probes produced by Delt a OHM are prov ided wit h a connect or.
The
H D 2 3 0 1 .0
Therm ohygrom et er also works wit h direct 4 wire Pt 100, and Pt 1000
probes m anufact ured by ot her producers: for t he inst rum ent connect ion is prescr ibed
t he
TP4 7
connect or t o which t he probe's wires should be welded.
The inst ruct ions t o connect t he Plat inum probe t o t he TP47 m odule are prov ided
below.
The
TP4 7
m odule is supplied com plet e w it h fair lead and gasket for 5 m m m ax im um
diam et er cables.
Do t he following t o open t he m odule and connect a probe:
1. unscrew t he fair lead;
2. ext ract t he gasket ;
3. rem ove t he label using a cut t er;
4. unscrew t he ring on t he opposit e side as illust rat ed in t he figure:
