Delta OHM HD2307.0 User manual

Operating manual
RTD Thermometer
HD2
307.0
www.deltaohm.com
Com panies / Brands of GHM
English
Ke e p for future refe r ence .

HD2307 - 2 - V1.7
CON TEN TS
GEN ERAL CH ARACTERI STI CS............................................................................................................................ 3
DESCRI PTI ON OF TH E FUN CTI ON S ............................................................................................................... 6
TH E PROGRAM M I NG M EN U ................................................................................................................................ 9
PROBES AN D M EASUREM EN TS ....................................................................................................................... 10
TEMPERATURE MEASUREMENT ................................................................................................................................... 10
CALI BRATI ON OF THE PROBE...................................................................................................................................... 10
CALI BRATI ON SEQUENCE –INSTRUMENT ON LI NE WI TH THE PROBE(S): .............................................................. 11
CONNECTI NG THE TP47 CONNECTOR FOR THE 3AND 4WI RE PT100 AND 2OR 4- WI RE PT1000
PROBES:....................................................................................................................................................................... 12
DIRECT CONNECTION OF 4WIRE PT100 SENSORS.......................................................................................................... 14
W ARN I N GS AN D OPERATI N G I N STRUCTI ON S ..................................................................................... 15
I N STRUM EN T SI GN ALS AN D FAU LTS ......................................................................................................... 16
I NSTRUM EN T STORAGE...................................................................................................................................... 16
LOW BATTERY W ARN I N G AN D BATTERY REPLACEM EN T ............................................................... 17
WARNI NG ABOUT BATTERY USE ................................................................................................................................. 17
NOTES ABO UT W ORKI N G AN D OPERATI VE SAFETY .......................................................................... 18
I N STRUM EN T TECH N I CAL CH ARACTERI ST I CS ..................................................................................... 19
TECHNI CAL I NFORMATI ON ON THE RTD THERMOMETER ......................................................................................... 19
TECHNI CAL DATA OF PROBES AND MODULES I N LI NE WI TH THE I NSTRUMENT....................................................... 20
TEMPERATURE PROBES PT100 SENSOR USI NG SI CRAM MODULE ................................................................... 20
Pt 100/ Pt 1000 probes wit h TP47 connect or wit hout SI CRAM m odule .......................................... 20
ORD ERI N G CODES ................................................................................................................................................. 21

HD2307 - 3 - V1.7
GEN ERAL CHARACTERI STI CS
The RTD Therm om et er Model H D2 3 0 7 .0 is a portable inst rum ent t hat m easures t he
t em perat ure.
I t is fit ted with a large LCD display for ex cellent v isualizat ion of t he m easured dat a.
The RTD Therm om et er Model H D2 3 0 7 .0 m easures t he t em perat ure using im m ersion,
penet ration, contact or air probes. I n this case, the sensor can be a 3 or 4 w ire Pt100,
or 2 or 4 wire Pt 1000.
The probes are fit ted with t he autom at ic det ection m odule, w it h t he fact ory calibr at ion
set t ings already being m em orized inside.
The unit s of m easurem ent are t he follow ing:
1. ° C Celsius degrees
2. ° F Fahrenheit degrees
Using t he Max, Min and Av g funct ion of t his inst rum ent respect iv ely obtains t he
m axim um , m inim um or average values.
Ot her available funct ions ar e:
•t he r elat ive m easurem ent REL;
•the HOLD function;
•the autom atic turning off which can also be disabled.

HD2307 - 4 - V1.7
RTD Therm om et er
H D 2 3 0 7.0

HD2307 - 5 - V1.7
HD2 3 0 7 .0
1. I nput for probes, 8-pole DI N45326 connector.
2. Bat tery sym bol: displays t he bat tery charge level.
3. Funct ion indicators.
4. Secondary display line.
5. DATA/ EN TER key: during norm al operat ion displays t he m ax im um ( MAX) , t he
m inim um ( MI N) and t he av erage ( AVG) of current m easurem ent s; in t he m enu,
confirm s the current selection.
6. CLR/ ESC key: during norm al operat ion reset s t he m axim um , t he m inim um and
t he average of current m easurem ent s; in the m enu, it reset s t he value set wit h the
arrows.
7. HOLD / key: freezes t he m easurem ent dur ing nor m al operat ion; in the m enu,
increases t he current value.
8. UN I T/ MEN U key: it allows select ion of t he unit of m easurem ent; when pressed
toget her with the DATA key, it allows to open t he m enu.
9. REL/ key: during norm al oper at ion enables t he relat ive m easurem ent ( displays
the difference bet ween t he current value and the logged value when the key is
pressed); in t he m enu, decreases the current value
10.ON -OFF/ AUTO-OFF key: t urns t he inst rum ent on and off; when pressed together
with the HOLD key, disables the AutoPowerOff funct ion.
11.MAX ( m ax im um value) , MI N ( m in im um v alue) and AV G ( average value) sy m bols.
12.Main display line.
13.Line for sym bols and com m ents.

HD2307 - 6 - V1.7
DESCRI PTI ON OF THE FUN CTI ON S
The keyboard of the RTD Therm om eter Model H D2 3 0 7 .0 is com posed of double-
funct ion keys. The funct ion on t he key is t he "m ain funct ion", w hile t he one above t he
key is the " secondary funct ion".
When t he inst rum ent is in st andard m easurem ent m ode, t he m ain funct ion is act ive.
I n t he m enu, t he secondary funct ion is enabled; press the D ATA+ U N I T keys together
t o open t he m enu.
The pr essing of a key is accom pan ied by a short confir m at ion " beep": a longer " beep"
sounds if the wrong key is pressed. Each key specific funct ion is descr ibed in det ail
below.
This key has t wo functions:
•ON / OFF: press this key t o turn t he instrum ent on and off.
The t urning on enables all display segm ent s for a few seconds, st art s an Au t o-t e st
including the det ect ion of t he probe connect ed to the input , and set s t he instrum ent
ready for norm al m easurem ent .
•AUTO/ OFF: the Au t o Po w e r O ff funct ion can be disabled by sim ult aneously
pressing t his key and t he " HOLD" key when t urning the inst rum ent on.
During turning on, should no probes be connect ed, t he "NO_ PRBE_ SER_ N UM "
m essage is displayed in t he line for sym bols for a few seconds, and in t he m ain line a
series of dashes appears while the " ERR" m essage replaces the t em perat ure.
When t he probe is insert ed int o a funct ioning inst rum ent , t he " N EW _ PROB_ DET"
( New probe det ect ed) m essage appears: as t he dat a ar e captured upon t urning t he
inst rum ent on, it is necessary to turn it off and on again.
Ca u t ion ! Replace t he probes when t he inst rum ent is off.
ON -OFF and AUTO-OFF

HD2307 - 7 - V1.7
The inst rum ent has an AutoPowerOff funct ion t hat autom at ically t ur ns the inst rum ent
off after about 8 m inutes if no key is pressed during the intervening t im e.
Press sim ultaneously t he ON / OFF key and the H OLD key t o disable t h is funct ion.
I n t his case, rem em ber t o t urn t he inst rum ent off using t he ON / OFF key: disabling of
t he autom at ic t urning off is shown by t he blinking bat tery sym bol.
The DATA key is used for the following functions:
•DATA: during norm al m easurem ent , by pressing t his key once t he m axim um
( MAX) value of t he m easurem ent s capt ured by t he pr obe connect ed t o t he
inst r um ent is display ed, updat ing it w it h t he acquisit ion of new sam ples;
- by pressing this key again the m inim um (MI N) value is displayed;
- by pr essing t his k ey a t hird t im e t he average ( AVG) v alu e is display ed.
The acquisition frequency is once a second.
The MAX, MI N and AVG values rem ain in t he m em ory unt il t he inst rum ent is on,
ev en aft er exit ing t he DATA display funct ion. When t he inst r um ent is off, t he
previously m em orized dat a ar e cleared. Upon turning on, t he inst rum ent
aut om at ically st art s m em orizing the MAX, MI N and AVG values.
To reset t he previous values and st art wit h a new m easurem ent session, press
CLR until the FUNC_ CLRD m essage appears.
•EN TER: once t he MENU has been opened wit h t he D ATA+ UN I T keys, t he DATA
key will perform t he ENTER funct ion and the MENU can be browsed and the
displayed param et er confirm ed.
The CLR key has t wo funct ions:
•CLEAR ( CLR) : allows to reset t he m axim um ( MAX) , m inim um ( MI N) and aver age
( AVG) value of t he capt ured m easurem ent s;
•ESC: once the MENU has been opened wit h the D ATA+ UN I T keys, t he CLR key
will allow t o cancel t he param et ers set using t he and arrows.
The H OLD key is used for the follow ing funct ions:
•HOLD: by pressing t his key t he current m easur em ent updat e is st opped and t he
"HOLD" m essage will appear in t he upper left-hand corner of the display. To ret urn
t o the current m easurem ent, press the key again.
D ATA/ EN TER k e y
HOLD / key
Disa bling of t he aut om atic tu rning off
CLR/ ESC key

HD2307 - 8 - V1.7
•: once the MENU has been opened wit h the DATA+ UN I T keys, t he key will
allow t o increase t he value of t he selected param et er.
Pressed t oget her wit h t he ON / OFF key, during t urn on, t he AutoPowerOff funct ion is
disabled ( see the description of t he ON/ OFF key) .
The UN I T key is used for t he following funct ions:
•UN I T: by pressing t his key the unit of m easurem ent of t he m ain input quant ity is
select ed: t he unit of m easurem ent will appear in t he upper part of t he display; t he
m easured value will be displayed in the cent ral line. By repeat edly pressing t he
UN I T key, t he desired unit of m easurem ent can be select ed bet ween t he
following:
1. ° C Celsius degrees
2. ° F Fahrenheit degrees
•M EN U : in the menu two it em s can be set:
1. Probe type
2. Use r ca libr at ion procedure for t he t em perat ure probe connect ed t o t he
inst rum ent
- t he m enu is opened by pressing sim ult aneously D ATA+ U N I T: t he first it em of the
inst rum ent program m ing m enu w ill appear;
- use t he and arr ow s ( r espect ively locat ed abov e t he HOLD and REL keys) t o
m odify t he displayed v alue;
- press D ATA/ EN TER t o confirm t he m odificat ion and go onto the next it em ;
- press CLR/ ESC t o ca nce l t he m odif icat ion;
- to ex it t he m enu, press t he UN I T/ M EN U key again.
The "REL" key is used for t he following functions:
•REL: it displays t he difference bet ween t he current value and t hat m easur ed on
pr essing t he key. The " REL" m essage is displayed on t he left . To ret urn t o t he
norm al m easurem ent, press t he key again.
•: once t he MENU has been opened with the D ATA+ U N I T keys, t he key will
allow t o decrease the value of t he select ed param eter.
REL/ k ey
UN I T/ M EN U k e y

HD2307 - 9 - V1.7
THE PROGRAM M I N G MEN U
To access t o t he m enu press sim ult aneously the following keys:
The it em s t o be set are list ed in this order:
1 . Pr obe t y pe:t he "RTD_ PRBE_ TYPE" m essage is displayed in t he com m ent
line. The m ain line in t he cent er of t he display shows t he t ype of probe
connect ed t o t he inst rum ent. The follow ing probes can be connect ed t o t he
input :
•tem perat ure probes Pt 100 com plet e wit h SI CRAM m odule
•direct 4-wire Pt 100 probes com plete w it h TP47 m odule
•direct 3-wire Pt 100 probes com plete w it h TP47 m odule
•2 or 4-wire Pt1000 probes com plet e wit h TP47 m odule
Upon t urning on t he inst rum ent autom at ically det ect s the probes fitted wit h
SI CRAM m odule: t he Probe Type m enu it em is configured as AUTO and cannot
be m odified by t he user.
Upon t urning on the direct 4 wire Pt100, direct 3 wire Pt100, and 2 wire Pt 1000
t em perat ure probes display t he "N O_ PRBE_ SER_ N UM"( n o serial nu m ber
of t he con n ect e d pr obe ) m essage; in this case t he probe t ype m ust be
e nt e re d m an u ally. Select Pr obe t y pe using the MENU key and then select t he
type of probe with t he arrow keys; confirm using ENTER.
•use t he and arrow s ( r espect iv ely locat ed abov e t he HOLD and REL key s)
to m odify t he type of probe;
•press D ATA/ EN TER t o confirm t he m odificat ion and go onto the next it em ;
•press CLR/ ESC t o ca nce l t he m odif icat ion;
•to ex it t he m enu, press the UN I T/ M EN U key again.
2 . St a r t in g t h e U ser ca libr a t ion pr oce du re: t he "> > > _ CAL_ M ODE" m essage
is displayed in t he com m ent line, and " FACt " is displayed in t he m ain line.
The inst rum ent is pr ovided wit h t he fact or y ( "FACt ") calibr at ion . I t is also
possible t o per form a " USER calibrat ion" (" USEr ")of inst rum ent+ probe. The
calibrat ion inform at ion is saved in t he inst rum ent m em ory and not in t he pr obe.
The sam e correct ion is applied t o any probe connect ed to t he input : t herefore,
the "USER calibrat ion" should only be used wit h t he probe used for calibrat ion
and not with other probes.
•use t he and arrows ( respect ively locat ed abov e t he HOLD and REL
key s) and select USEr, t o access t he " USER calibrat ion" procedur e;
•pr ess DATA/ ENTER t o confir m t he m odificat ion;
•the "SEL_MEAS_1/ 2" m essage is displayed in the com m ent line;
•use t he and arrows ( respect ively locat ed abov e t he HOLD and REL
keys) t o select "0", "1" or "2" in t he m ain line;
•pr ess DATA/ ENTER t o confir m t he m odificat ion;
•pr ess CLR/ ESC t o cancel t he m odificat ion;
•to ex it t he m enu, press t he UNI T/M EN U key again.

HD2307 - 10 - V1.7
PROBES AN D MEASUREM ENTS
The inst rum ent wor ks w it h t em perat ur e pr obes fit t ed wit h SI CRAM m odule ( w it h a
Platinum Pt100 sensor with 100Ω resistance) or with direct 4 wire Pt100, 3 wire
Pt 100, or 2 wire Pt 1000 sensor. The excit at ion current was chosen in or der t o
m inim ize the sensor self-heat ing effect s.
The SI CRAM m odule act s as an interface bet ween t he sensor on t he probe and the
inst rum ent . There is a m icroprocessor circuit w it h a perm anent m em ory inside the
m odule t hat enables t he inst rum ent t o recognize t he t ype of probe connected and t o
read it s calibrat ion inform at ion.
The probes w it h SI CRAM m odule are aut om at ically det ect ed, while t he direct probes
m ust be set up in t he Pr obe t y pe m enu it em ( please see chapt er ‘The program m ing
m enu’) .
The probe is det ect ed durin g turn on, and t his ca nnot be per form ed w hen the
instr um ent is alr eady on, t her efore if a probe is connect ed and the
instr um ent is on , it is necessary t o t urn it off a nd on.
TEM PERATURE MEASU REM EN T
I n all versions the t em perat ure sensor is housed in t he end part of t he probe.
The response tim e for t he m easurem ent of the tem perat ure in air is great ly reduced if
t he air is m oving. I f t he air is st ill, st ir t he probe. The response t im es are longer t han
t hose for liquid m easurem ent s.
The t em perat ure m easurem ent by im m e rsion is carried out by inserting the probe in
the liquid for at least 60 m m ; t he sensor is housed in t he end part of the probe.
I n t he tem perat ure m easurem ent by pe n et ra t ion t he probe t ip m ust be insert ed t o a
depth of at least 60 m m , the sensor is housed in the 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 to bore a cavit y in which to insert t he t ip probe.
I n order to perform a correct con t a ct m easurem ent, the m easurem ent surface m ust
be even and sm oot h, and the probe m ust be perpendicular to the measurem ent plane.
So a s t o obt ain t h e cor r ect m e asur em e nt , t he in se rt ion of a dr op of oil or
h ea t -conduct ive pa st e betw een the sur face and the pr obe is usefu l ( do n ot
use w ater or solvents) . This m et hod also im proves t he respon se tim e.
The ° C or ° F unit of m easurem ent can be chosen using the UNI T/ MENU key.
CALI BRATI ON OF TH E PROBE
To calibrat e t he probes correct ly, a knowledge of and abiding by the physical
phenom ena on which t he m easurem ent is based is fundam ent al: t his is t he reason
why it is recom m ended to abide by what is reported below carefully, and only t o
perform new calibr at ions if t echnically pr oficient and using t he suit able equipm ent .
The sensor is ca libr at e d in t he fa ct ory an d the Calle nda r V an Duse n
par am et er s a re r ecorde d in t h e SI CRAM m odu le. The probes with direct input

HD2307 - 11 - V1.7
a re ch eck e d for con for m it y w it h class A t ole ra n ce according to norm I EC751 -
BS1904 - DI N43760.
The inst rum ent is provided wit h t he FACT ( fact ory) calibr at ion.
The user is also able to perform a USER ca lib ra t ion of inst rum ent + probe.
The calibrat ion inform at ion is saved in t he instrum ent m em ory and not in the probe.
The sam e correct ion is applied t o any probe connect ed t o t he input : t herefore, the
"USER calibrat ion" should only be used wit h t he probe used for calibrat ion and not
with other probes.
To pass from t he user to t he factory calibration and back, proceed as follows:
•press sim ult aneously UN I T/ M EN U and DATA/ EN TER to open the m enu:
•press ENTER until t he m enu it em "CAL_ MODE" is select ed.
•use t he and arr ow s ( r espect ively locat ed abov e t he HOLD and REL keys) t o
select t he t ype of calibrat ion;
•confirm by pressing D ATA/ EN TER.
CALI BRATI ON SEQUEN CE –IN STRUM EN T ON LI N E W I TH TH E PRO BE(S) :
The calibrat ion can be carried out on one or t wo points t h a t sh ou ld diffe r by a t
le ast 1 0 ° C and be included in the probe funct ioning range.
1. I nsert the probe int o a t herm ost at ic bat h, the t em perat ure of which is precisely
known from a reading taken on a sam ple reference therm ometer. Wait for t he
m easurem ent to st abilize.
2. Press cont em por ar ily U N I T/ M EN U and DATA/ EN TER.
3. Press D ATA/ EN TER.
4. Use t he and ar row s ( respect ively locat ed abov e t he HOLD and REL key s) t o
select t he USER calibr at ion;
5. Confir m w it h D ATA/ EN TER.
6. The "SEL_ M EAS_ 1 / 2 " m essage is displayed in t he com m ent line.
7. Use t he and arrows to select " 1 " ( fir st calibrat ion point ) .
8. Confirm with DATA/ EN TER.
9. The "UP DOW N 1 st M EAS" m essage is displayed in t he com m ent line: t he
inst rum ent display shows t he m easured t em per at ure.
10.Use the and ar row s t o cor rect t he indicat ed value unt il it coincides wit h t he
value m easured by t he sam ple r eference t herm om et er.
11.Confirm wit h DATA/ EN TER.
12.To exit t he procedure without perform ing the second point, select "0 " and press
EN TER.
13.To calibr at e t he second point , select t he point " 2 " using t he and arrows.
14.Press D ATA/ EN TER.
15.The " UP DOW N 2 nd M EAS" m essage is displayed in t he com m ent line.
16.Move t he probe to t he second t herm ost at ic bat h and wait for t he m easurem ent t o
stabilize.
17.The inst rum ent display shows the m easured t em perat ure.
18.Use the and ar row s t o cor rect t he indicat ed value unt il it coincides wit h t he
value m easured by t he sam ple r eference t herm om et er.
19.Confirm wit h DATA/ EN TER.
20.To exit t he procedure, select " 0 " using the and arrows and press EN TER.
The procedure is now com plet e.

HD2307 - 12 - V1.7
CON N ECTI N G TH E TP4 7 CON N ECTOR FOR TH E 3AN D 4W I RE PT1 0 0 AN D 2OR 4 -
W I RE PT1000 PROBES:
Where pr esent , ex tend t he t elescopic rod t o t he necessary lengt h pay ing at tent ion t o
the cable so that All probes produced by Delta OHM are provided wit h a connect or.
The Plat inum Therm om et er Model H D2 3 0 7 .0 also work wit h direct 3 and 4-w ire
Pt 100 and 2 or 4-wire Pt1000 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 to which the probe's wires
should be welded.
The inst ruct ions t o connect t he Plat inum pr obe t o t he TP47 m odule are pr ov 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 the fairlead;
2. ext ract t he gasket;
3. rem ove t he label using a cut ter;
4. unscrew t he r ing on t he opposit e side as illust rat ed in t he figur e:
5. open t he two m odule shells: t he print ed circuit t o which t he probe m ust be
connect ed is housed inside. On t he left there are the 1…4 points on which the
sensor wires must be welded. The JP1…JP4 j um pers are in t he center of t he board.
These m ust be closed wit h a t in bead for som e t ype of sensors:
1
2
3
4
Pt100 3 wires
Pt1000
Ni1000
Not Used
Ca u t ion ! Before welding, pass the probe cable through t he fairlead and gasket.

HD2307 - 13 - V1.7
6. Weld the w ires as shown in t he t able:
Sensor
TP4 7 Boa r d con ne ct ion
Jum p er t o close
Pt 100 4
wires
4JP4
3JP3
1JP1
2 JP2
Pt100
4 wires
None
Pt 100 3
wires
4JP4
3JP3
1JP1
2 JP2
Pt100
3
wires
JP1
Pt 1000 2
wires
JP4
4
JP3
3
JP1
1
JP22
Pt1000
2
wires
JP2
Pt 1000 4
wires
JP2
Ensure t he welds are clean and perfect .
7. Once t he welding operation is com plete, close t he t wo shells;
8. I nsert the gask et in t he m odule;
9. Screw the fairlead and the ring.
10.At the ot her end of the m odule, enter t he ring w it h t he O-Ring as indicat ed in t he
pict ure.
11.Make sure t he cable is not t wist ed while you are screwing the fairlead. Now t he
probe is ready.

HD2307 - 14 - V1.7
DIRECT CONNECTION OF 4WIRE PT100 SENSORS
4 w ir e Pt 1 0 0 se nsors can be soldered
dir ect ly t o t he pin s of t he fly ing fem ale
connect or wit hout m aking use of t he
TP47 board. The 4 wires of t he Pt 100
sensors have t o be soldered as
indicat ed in the figure on the left. I n
order t o use t his t y pe of pr obe it is
necessary t o set up t he m enu it em
“ Probe Type” .
The P100 probe is recognized upon
t urning on t he inst rum ent : connect the
probe when t he inst rum ent is sw it ched
off and then t urn it on.
Sensor
Direct soldering to the connector
Pt100 4
wires
View of the soldering side
of the flying female connector

HD2307 - 15 - V1.7
W ARN I N GS AN D OPERATI N G I N STRUCTI ON S
1. Do not expose t he probes t o gases or liquids that could corrode the m at erial of t he
sensor or t he probe itself. Clean t he probe carefully after each m easurem ent.
2. Do not bend the probe connectors or force them upward or downward.
3. Do not bend or for ce t he cont act s when insert ing t he probe connect or int o t he
inst rum ent .
4. Do not bend, deform or drop t he probes, as t his could cause irreparable dam age.
5. Always select t he m ost suitable probe for y our applicat ion.
6. Do not use t he tem perat ure probes in presence of corrosive gases or liquids. The
sensor cont ainer is m ade of AI SI 316 st ainless st eel, while t he cont act probe
container is m ade from AI SI 316 st ainless st eel plus silver. Avoid cont act bet ween
t he probe surface and any st icky surface or product t hat could corrode or dam age
it .
7. Above 400° C and below –40° C, av oid v iolent blows or t her m al shock s t o Plat inum
tem perat ure probes as t his could cause irreparable dam age.
8. To obt ain reliable m easurem ent s, t em perat ure var iat ions t hat are too rapid m ust
be avoided.
9. Tem perat ure probes for surface m easurem ents ( cont act pr obes) m ust be held
perpendicular against t he surface. Apply oil or heat -conduct ive past e bet ween t he
surface and t he pr obe in or der t o im prov e cont act and r educe r eading t im e.
What ever you do, do not use wat er or solvent for t his purpose. A contact
m easurem ent is always very hard t o perform . I t has high levels of uncert ainty and
depends on t he ability of t he operat or.
10.Tem perature m easurem ent s on non-m et al surfaces usually require a great deal of
t im e due t o t he low heat conduct ivity of non-m etal m aterials.
11.The sensor is not insulat ed from it s ext ernal casing; be very careful not t o com e
int o cont act w it h liv e par ts ( above 48V) . This could be ex trem ely
dangerous for the inst rum ent as w ell as for t he operat or , who could be
elect rocuted.
12.Avoid t aking m easurem ent s in presence of high frequency sources, m icrow ave
ovens or large m agnet ic fields; result s m ay not be very reliable.
13.Clean the probe carefully after use.
14.The inst rum ent is wat er resist ant and I P67, but should not be im m ersed in wat er.
The probe connect ors m ust be fit ted wit h sealing gasket s. Should t he inst rum ent
fall int o t he w at er , check for any w at er infilt rat ion. Gent ly handle t he inst rum ent in
such a way as to prevent any water infiltrat ion from t he connect ors' side.

HD2307 - 16 - V1.7
I N STRUM EN T SI GN ALS AN D FAULTS
The following t able list s all er ror indicat ions and inform at ion displayed by t he
inst rum ent and supplied to the user in different operat ing sit uations:
D isp la y in dica t ions
Ex pla n a t ion
> > > CAL_ M OD E
Calibrat ion m ode
RTD _ PRBE_ TYPE
Type of probe connect ed
1 ST_ MEAS UP D OW N
Correct the first point using t he arrows

/

2 N D_ M EAS UP DOW N
Correct t he second point using the arrows

/

BATT TOO LOW
CH N G N O W
Indication of insufficient batt ery charge appearing on turning on.
Th e inst r um ent issu es a long beep an d t urns off. Replace t h e
bat t er ies.
CAL
LOST
Pr og ram er ror : it ap pear s aft er t u rn in g on for a few seconds.
Contact t he inst rum ent 's supplier.
CAL FACT
Fact ory calibration
CAL USER
User calibration
ERR
This appears if t he pr obe has alr eady been det ect ed by t he
instrum ent, but is disconnect ed. At t he sam e t im e an
int erm it tent beep is issued.
FUN C CLRD
Max, m in and average v alues cleared
NEW PROBE DET This m essage appears when a probe is inserted int o a funct ioning
instrum ent . Turn t he inst rum ent off and then back on again.
N O_ PRBE_ SER_ N UM
The connect ed p robe' s ser ial num ber is absent
OVER or UN DR
Measu rem ent ov erflow : indicat es t hat t he prob e is m easuring
a value ex ceeding the m easuring range.
PLS_ EX I T > > > FU N C
RES_ FOR_ FACT ON LY
Please exit using ESC > > > funct ion reserv ed t o fact ory
calibration
PRBE_ SER # # # # # # # #
Serial num ber # # # # # # # # of t he connect ed probe
PROB
ERR
A pr ob e w it h SI CRAM m odu le has been insert ed w hen not
adm issible for t hat specific in st rum ent .
PROB COM M LOST
This appear s if t h e prob e has alr eady been d et ect ed by t he
inst rum ent, but is disconnect ed. At t he sam e t im e an
int erm it tent beep is issued.
SEL MEAS 1 / 2
Select m easurem ent 1 or 2
SYS
ERR
#
I nst rum ent m anagem ent program er ror. Con t act t he
inst rum ent 's supplier and com m unicat e t he num eric code #
repor t ed by t h e display .
I N STRUM EN T STORAGE
I nst rum ent st or age condit ions:
•Tem perat ure: -25…+ 65° C.
•Hum idit y: less than 90% RH wit hout condensation.
•Do not st ore t he instrum ent in places where:
•hum idity is high;
•the inst rum ent m ay be exposed to direct sunlight;
•t he inst rum ent m ay be exposed t o a source of high t em perat ure;
•the inst rum ent m ay be exposed to strong vibrat ions;
•t he inst rum ent m ay be exposed t o st eam , salt or any corr osive gas.
The inst rum ent case is m ade of ABS plast ic: do not use any incom pat ible solvent for
cleaning.

HD2307 - 17 - V1.7
LOW BATTERY W ARN I N G AN D BATTERY REPLACEM EN T
The bat tery sym bol
on t he display const antly shows the bat tery charge st atus. To t he ext ent that bat t er ies
have dischar ged, the sym bol "em pt ies" . When t he charge decreases st ill further it
start s blinking.
I n t his case, bat teries should be replaced as soon as possible.
I f you continue to use it, the inst rum ent can no longer ensure correct m easurem ent.
The m em ory dat a are m aint ained.
I f t h e ba t t er y ch ar ge lev el is insu fficien t , t h e f ollow ing m e ssa ge a ppe ar s
w h en you t urn the inst rum ent on:
BATT TOO LOW
CH N G N OW
The inst rum en t issues a lon g beep and tu rns off. I n this case, repla ce the
ba t t er ie s in or de r t o t urn the instrum ent back on .
To replace t he bat teries, proceed as follows:
1. swit ch t he inst rum ent off;
2. unscrew t he battery cover counter clockwise;
3. replace t he bat t er ies ( 3 1.5V alkaline bat t er ies - t ype AA) ;
4. screw the cover on clockwise.
M alfu nct ion ing upon turning on aft er bat tery replacem en t
Aft er replacing t he bat teries, t he inst rum ent m ay not rest art correct ly; in t his case,
repeat t he operation.
Aft er disconnect ing t he bat teries, wait a few m inut es in order t o allow circuit
condensers to dischar ge com pletely; then reinsert t he bat teries.
WARN I N G ABOU T BAT TERY USE
•Bat teries should be rem oved when the inst rum ent is not used for an ext ended
t im e.
•Flat batt er ies m ust be replaced im m ediat ely.
•Avoid bat teries leaking.
•Always use good qualit y leakproof alkaline bat teries. Som et im es on t he m arket ,
it is possible t o find new bat teries w it h an insufficient charge capacity.

HD2307 - 18 - V1.7
N OTES ABOUT W ORKI N G AN D OPERATI VE SAFETY
Au t hor iz e d u se
The t echnical specifications as given in chapter TECHNI CAL CHARACTERI STI CS m ust
be observed. Only t he operat ion and running of the m easuring inst rum ent according
t o t he inst ruct ions given in t his operat ing m anual is aut hor ized. Any ot her use is
considered unauthorized.
Ge ne r al sa fe t y inst r uct ions
This m easuring system is const ructed and t est ed in com pliance wit h t he EN 61010-1
safety regulat ions for elect ronic m easuring inst rum ent s. I t left t he fact ory in a safe
and secure technical condit ion.
The sm oot h funct ioning and operat ional safet y of the m easuring syst em can only be
guaranteed if t he generally applicable safet y m easures and t he specific safet y
inst ruct ions in t his operat ing m anual are followed dur ing oper at ion.
The sm oot h funct ioning and operat ional safet y of t he inst r um ent can only be
guaranteed under t he envir onm ent al and elect r ical operat ing condit ions t hat ar e in
specified in chapt er TECHNI CAL CHARACTERI STI CS.
Do not use or store t he product in places such as list ed below:
•Rapid changes in am bient tem perat ure which m ay cause condensat ion.
•Corrosive or inflam m able gases.
•Dir ect v ibrat ion or shock t o t he inst rum ent .
•Excessive induct ion noise, st at ic elect r icit y, m agnet ic fields or noise.
I f the m easuring sy st em was t ransport ed from a cold envir onm ent t o a w arm
environm ent , t he form at ion of condensat e can im pair t he funct ioning of t he m easurin g
syst em . I n t his event , wait unt il t he t em perat ure of the m easuring syst em reaches
room t em perature before putt ing t he m easuring system back int o operat ion.
Obligat ions of t he purcha ser
The purchaser of t his m easuring syst em m ust ensure t hat t he follow ing laws and
guidelines are observed when using dangerous subst ances:
EEC direct iv es for prot ect iv e labour legislat ion
Nat ional pr ot ect iv e labour leg islat ion
Safet y regulat ions

HD2307 - 19 - V1.7
I N STRUM EN T TECH NI CAL CH ARACTERI STI CS
TECH NI CAL I N FORM ATI ON ON TH E RTD TH ERM OM ETER
I nst rum ent
Dim ensions ( Length x Widt h x Height ) 140 x 88 x 38 m m
Weight 160 g ( com plet e wit h bat t er ies)
Mat erial ABS
Display 2x4½ digit s plus sym bols
Visible area: 52 x 42 m m
Operat ing condit ions
Operat ing tem perat ur e - 5…+ 50° C
Warehouse t em perat ure - 25…+ 65° C
Working r elat ive hum idit y 0…90% RH w it hout condensat ion
Pr ot ect ion de gr ee I P6 7
Power
Bat teries 3 1.5V t ype AA bat t eries
Aut onom y 200 hours wit h 1800m Ah alkaline
bat teries
Power absorbed wit h inst rum ent off < 20 µA
Connect ions
I nput for probes 8- pole m ale DI N45326 connector
Unit of Measurem ent ° C - ° F;
Measurem ent of t em perat ure by I nst rum ent
Pt 100 m easurem ent range - 200…+ 650° C
Pt 1000 m easurem ent range - 200…+ 650° C
Resolution 0.1° C
Accuracy ±0.05° C
Drift after 1 year 0.1° C/ year

HD2307 - 20 - V1.7
TECH NI CAL D ATA OF PROBES AN D M ODULES I N LI NE W I TH TH E I N STRUMEN T
TEM PERATURE PROBES PT100 SEN SOR USI N G SI CRAM MODULE
Model Type
Applica t ion
range
Accu ra cy
TP4 7 2 I I m m ersion
-
196° C…+ 500° C
± 0.1° C ( @ 0 ° C)
± 0.2° C ( -50 °C ≤ t ≤
250 ° C)
± 0.3° C ( t < -50 ° C; t
> 250 ° C)
TP4 7 2 I .O I m m ersion - 50° C…+ 300° C
TP4 7 3 P.I Penet rat ion - 50° C…+ 400° C
TP4 7 3 P.O Penet rat ion - 50° C…+ 300° C
TP4 7 4 C.O Contact - 50° C…+ 300° C
TP4 7 5 A.O Air - 50° C…+ 250° C
TP4 7 2 I .5 I m m ersion - 50° C…+ 400° C
TP4 7 2 I .1 0 I m m ersion - 50° C…+ 400° C
TP4 9 A.I I m m ersion - 70° C…+ 250° C
TP4 9 AC.I Contact - 70° C…+ 250° C
TP4 9 AP.I Penet rat ion - 70° C…+ 250° C
TP8 7 5 .I
Globe-t herm om et er
Ø 150 m m
-30° C…+ 120° C
TP8 7 6 .I
Globe-t herm om et er
Ø 50 m m
-30° C…+ 120° C
TP8 7 .O I m m ersion - 50° C…+ 200° C
Com m on characterist ics
Re solut ion 0 .0 1 ° C in t he range ± 1 9 9 .9 9 ° C,
0 .1 ° C in t h e r em a ining f ie ld
Tem perat ure drift @ 20° C 0.003% / ° C
Pt 1 0 0 / Pt1 0 0 0 pr obes w it h TP4 7 con ne ct or w it h ou t SI CRAM m odule
Model
Type
Applica t ion r a nge
Accu ra cy
TP4 7 .1 0 0 .O
Pt 100 4 wires
-50…+ 250° C
Class A
TP4 7 .1 0 0 0 .O
Pt 1000 4 w ires
-50…+ 250° C
Class A
TP8 7 .1 0 0 .O
Pt 100 4 wires
-50…+ 200° C
Class A
TP8 7 .1 0 0 0 .O
Pt 1000 4 w ires
-50…+ 200° C
Class A
Com m on characterist ics
Re solut ion 0 .0 1 ° C in t he range ± 1 9 9 .9 9 ° C,
0 .1 ° C in t h e r em a ining f ie ld
Tem perat ure drift @ 20° C Pt 100 0.003% / ° C
Pt 1000 0.005% / ° C