GHM Delta OHM HD2304.0 User manual

Operating manual
Manometer
-Thermometer
HD2304.0
www.deltaohm.com
English
Ke ep for future refer ence.

HD2304 - 2 - V1.8
I N D EX
GENERAL CHARACTERI STI CS ......................................................................... 3
DESCRI PTI ON OF TH E FU NCTI ON S ................................................................. 6
TH E PROGRAM MI N G M EN U ........................................................................... 1 0
PROBES AN D MEASUREMEN TS...................................................................... 1 1
PP471 MODULE FOR PRESSURE MEASUREMENT .......................................................... 11
PT100 TEMPERATURE PROBES .............................................................................. 12
TEMPERATURE MEASUREMENT............................................................................ 12
CONNECTI NG THE TP47 CONNECTOR................................................................... 12
DI RECT CONNECTI ON OF 4- WI RE Pt100 SENSOR .................................................... 14
I N STRUM EN T SI GNALS AN D FAULTS ............................................................ 1 5
W ARN I N GS .................................................................................................. 1 6
I N STRUM EN T STO RAGE ................................................................................ 1 7
LOW BATTERY W ARN I N G AN D BATTERY REPLACEM EN T ............................... 1 8
WARNI NG ABOUT BATTERY USE ............................................................................. 18
NOTESABOUT W ORKI N G AN D OPERATI VE SAFETY........................................ 1 9
TECH N I CAL CHARACTERI STI CS .................................................................... 2 0
TECHNI CAL CHARACTERI STI CS OF THE MANOMETER- THERMOMETER.................................. 20
TECHNI CAL DATA OF PROBES AND MODULES I N LI NE WI TH THE I NSTRUMENT........................ 21
PRESSURE MEASUREMENT BY PP471 MODULE ........................................................ 21
SONDE DI TEMPERATURA SENSORE Pt 100 CON MODULO SI CRAM .................................. 22
Pt100 4- WI RE PROBES ...................................................................................22
ORD ERI N G CODES ........................................................................................ 2 3

HD2304 - 3 - V1.8
GEN ERAL CH ARACTERI STI CS
The HD2 3 0 4 .0 Manom eter - Therm om et er is a por table inst rum ent t hat allow s
m easurem ent of a bsolu t e , r ela t iv e and diff er ent ial p re ssu re , and t em pera t ure .
•The PP4 7 1 elect ronic m odule is used t o m easure the pressure. The m odule
works as an interface between the inst rum ent and t he TP704 and TP705 series
Delta Ohm probes.
•The t em pe r at ure is det ect ed using im m ersion, penet rat ion, cont act or air
Pt100 probes wit h SI CRAM m odule, or direct 4 wire Pt100 probes.
The probes are fit ted with the SI CRAM aut om at ic detect ion m odule, wit h t he fact ory
calibrat ion set t ings alr eady being m em or ized inside.
The unit s of m easurem ent for t he m easurable quant it ies are:
•Pa ( Pascal)
•hPa ( hect opascal)
•kPa ( kilopascal)
•m bar ( m illibar)
•bar ( bar )
•at m ( at m ospher e)
•m m Hg ( m illim eter of m ercury)
•mmH2O ( m illim et er of wat er )
•kgf/ cm ² ( kilogram -for ce/ square centim eter)
•PSI
•inchHg ( inch of m ercury)
•inchH2O ( inch of w at er)
•° C/ ° F
Using t he MAX, MI N and AVG funct ion of t his inst rum ent respect ively obtains t he
m axim um , m inim um or average values.
Ot her av ailable funct ions are:
•t he r elat ive m easurem ent REL;
•the HOLD funct ion;
•the autom atic t urning off which can also be disabled.
For further details, see chapt er ‘Descript ion of t he funct ions’ at page 6.

HD2304 - 4 - V1.8
M anom et e r - The rm om e t er
H D 2 3 0 4.0

HD2304 - 5 - V1.8
HD 2 3 0 4.0
1. I nput for probes, 8-pole DI N45326 connector.
2. Bat tery sym bol: displays t he batt ery charge level.
3. Function indicators.
4. Secondary display line.
5. D ATA/ EN TER key: dur in g norm al operat ion displays t he m axim um ( MAX) , t he
m inim um ( MI N) and t he average ( AVG) of curr ent m easurem ent s; in t he m enu,
confirm s the current select ion.
6. CLR/ ESC key: during norm al operat ion reset s the m axim um , t he m inim um and t he
average of cur rent m easurem ents; in t he m enu, it reset s t he value set with t he
arrows.
7. H OLD/key: freezes t he m easurem ent during norm al operat ion; in t he m enu,
increases the current value.
8. U N I T/ M EN U key: it allows select ion of t he unit of m easurem ent; when pressed
together wit h the DATA key, it allows to open the m enu.
9. ZERO: perform s the zero of t he pressure probes.
10.REL/ key: during norm al operat ion enables t he relat ive m easurem ent ( displays
the difference between the current value and the logged value when t he key is
pressed) ; in t he m enu, decreases the current value.
11. ON -OFF/ AUTO-OFF key: t urns t he inst rum ent on and off; when pressed
together wit h t he HOLD key, disables the AutoPowerOff funct ion.
12. MAX ( m ax im um value) , MI N ( m inim um v alue) an d AV G ( average value)
sym bols.
13. Main display line.
14. Line for sym bols and com m ent s.

HD2304 - 6 - V1.8
DESCRI PTI ON OF THE FUN CTI ON S
The keyboard of t he H D2 3 0 4 .0 Manom eter – Therm om et er is com posed of double-
function keys. The funct ion on t he key is the " m ain funct ion" , while t he one above the
key is t he "secondary funct ion".
When t he inst rum ent is in st andar d m easurem ent m ode, t he m ain funct ion is act ive.
Once t he Set tin gs Menu has been opened, by pressing sim u lt aneously t he
D ATA+ UN I T keys, the secondary function is enabled.
The pressing of a key is accom panied by a shor t confirm at ion " beep": a longer "beep"
sounds if t he wrong key is pressed. Each key specific funct ion is described in detail
below.
This key has two funct ions:
•ON / OFF: to turn t he inst rum ent on press ON , to t urn it off press OFF.
The t urning on enables all display segm ent s for a few seconds, st arts an Auto-test
includin g t he det ect ion of t he probe connect ed t o t he input, and set s t he inst rum ent
ready for norm al m easurem ent . The following is displayed:
MIN
cm
min s
2
3
m
µ
m
k
>>>
•AUTO/ OFF: t he Au t oPo w e r O ff funct ion can be disabled by sim ult aneously
pressing t his key and t he "HOLD " key when turning the inst rum ent on.
During turning on, should no probes be connect ed, t he "N O_ PRBE_ SER_ N UM"
m essage is displayed in t he line for sym bols for a few seconds, while the " ERR"
m essage is shown in the central part of t he display. When t he probe is inserted int o a
funct ioning inst rum ent , the "N EW _ PROB_ DET" ( New probe det ect ed) m essage
appears, while the "ERR" m essage is shown in t he cent ral part of the display, and a
sequence of "beeps" is sim ult aneously issued. As the dat a are capt ured upon t urning
the inst rum ent on, it is necessary to turn it off and on again.
Ca u t ion ! Replace the probes when t he inst rum ent is off.
ON / OFF a nd AUTO/ OFF k ey

HD2304 - 7 - V1.8
The inst rum ent has an AutoPowerOff funct ion that autom at ically t urns t he inst rum ent
off aft er about 8 m inutes if no key is pressed dur ing t he int ervening t im e.
Press sim ult aneously t he ON / OFF key and t he H OLD key t o d isable t h is funct ion.
I n t his case, r em em ber t o t urn t he inst rum ent off using t he ON / OFF key: disabling of
t he aut om at ic turning off is shown by t he blink ing bat tery sym bol.
The CLR key has t wo funct ions:
•CLEAR ( CLR) : allow s t o r eset the m axim um ( MAX) , m inim um ( MI N) and
av erage ( AVG) value of t he capt ured m easurem ents;
•ESC: once t he MENU has been opened wit h the D ATA+ UN I T keys, t he CLR
key will allow t o cancel t he par am et ers set using t he and arrows.
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) v alue of t he m easurem ent s capt ured by t he probe connect ed t o t he
inst rum ent is displayed, updat ing it w it h t he acquisit ion of new sam ples. By
pressing t his key again, t he m inim u m ( MI N) value is displayed and by pressing
this key a third t im e t he average ( AVG) value is displayed.
The acquisit ion frequency is once a second.
The MAX, MI N and AVG values rem ain in the m em ory unt il t he inst rum ent is on,
even after exit ing the DATA calculat ion funct ion. When the inst r um ent is off, t he
previously m em orized data are cleared. Upon t urning on, t he inst rum ent
autom atically st arts m em or izing t he MAX, MI N and AVG values.
To reset the previous values and st art wit h a new m easurem ent session, press
until t he FUN C_ CLRD m essage appears.
•EN TER: once t he MENU has been opened with the D ATA+ UN I T keys, t he
DATA k ey w ill perform t he ENTER funct ion and t he MENU can be br ow sed and
t he displayed param et er confirm ed. Dur ing elect rode calibr at ion, it allows t o
decrease the nom inal buffer value.
The H OLD key is used for t he following funct ions:
•HOLD : by pressing this key t he current m easurem ent is frozen and t he "HOLD"
m essage will appear in t he upper left-hand corner of t he display. To ret urn t o
t he current m easurem ent, press t he key again.
•: once t he MENU has been opened wit h t he D ATA+ M EN U key, t he key w ill
allow to increase t he value of t he select ed param et er.
DATA/ EN TER k ey
HOLD /k ey
D isa blin g of t he a ut om a t ic t ur ning off
CLR/ ESC k ey

HD2304 - 8 - V1.8
Pressed t oget her w it h t he ON/ OFF key , during t ur n on, t he Aut oPowerOff funct ion is
disabled (see the descript ion of the ON/ OFF k ey) .
The UN I T key is used for the following functions:
•UN I T: by pressing t his key t he unit of m easurem ent of t he input probe is
select ed: t he unit of m easurem ent will appear in t he upper part of t he display;
the m easured value will be displayed in the cent ral line. By repeat edly pressing
the UN I T key, t he desir ed unit of m easurem ent can be select ed bet ween t he
follow ing:
oPressure m easurem ent unit:
Pa ( Pascal)
hPa ( hect oPascal)
kPa (kiloPascal)
m bar ( m illibar)
bar ( bar)
at m ( at m ospher e)
m m Hg ( m illim et er of m ercury)
mmH2O ( m illim et er of wat er )
kgf/ cm ² ( kilogram -for ce/ square cent im et er)
PSI
inchHg ( inch of m ercury)
inchH2O ( inch of w at er)
oTem perat ure m easurem ent unit:
° C ( Celsius degrees)
° F ( Fahr enheit degrees)
•M EN U: t he m enu includes t he Pr obe Type it em . This it em displays t he t y pe of
probe connect ed t o t he instrum ent's input ( see chapt er xx):
- t he m enu is opened by pressing sim ult aneously D ATA+ UN I T: t he first it em of
t he inst rum ent program m ing m enu will appear ;
- use the and arrow s ( respect ively locat ed above t he HOLD and REL keys) t o
m odify t he disp lay ed value;
- press D ATA/ EN TER to confirm t he m odificat ion and go onto t he next it em ;
- press CLR/ ESC t o can cel t he m odificat ion;
- to e x it the m enu, press t he U N I T/ M EN U key again.
By pressing t his key, t he ZERO of t he pressure probes is perform ed.
•I n t he differential pr essure probes leave the t wo input s open, so that they
detect the sam e pressure.
•I n t he relat ive pr essure ( com pared t o t he at m osphere) pr obes, leave the input
open, so t hat it det ect s the at m ospheric pressure.
•I n t he absolut e pressure probes, apply t he vacuum by using a suit able pressure
calibrator.
UN I T/ M EN U k e y
Ta st o ZERO

HD2304 - 9 - V1.8
The REL key is used for t he follow ing funct ions:
•REL: it displays t he difference bet ween t he current value and t hat m easured on
pressing the key. The " REL" m essage is displayed on t he left . To return t o the
norm al m easurem ent , press t he key again.
•: once t he MENU has been opened wit h t he U N I T+ M EN U key, the key will
allow to decrease the value of t he select ed param eter.
REL/k ey

HD2304 - 10 - V1.8
TH E PROGRAMM I N G M EN U
To access t o t he m enu press sim ult aneously t he following keys:
Menu:
Pr obe t y pe : t he "PRBE_ TYPE" m essage is displayed in the com m ent line. The m ain
line in the cent er of the display shows t he type of pr obe connect ed t o the inst rum ent.
The following probes can be connect ed t o the input :
•TP704 and TP705 pressure probes com bined with t he PP471 m odule: the t ype
of pr obe ( i.e. if t he PP471 m odule and t he TP704-2BAI probe ( 2 bar absolut e)
are connected) is shown in t he central part of t he display. I n t he m ain line " 2"
is displayed, which indicates t he sensor's bot tom scale. The unit of
m easurem ent "bAr" and t he sensor charact erist ic " Abs" ( absolut e) are
displayed alternately in the secondary line;
•t em perat ure probes " Pt100" com plet e wit h SI CRAM m odule: t he " Au t o "
m essage is displayed in t he cent ral part of t he display;
•direct 4 w ir e "Pt 100" t em perat ur e pr obes: in t his case, t he "1 0 0 Pt _ 4 u"
m essage is displayed.
N OTE: Upon t urning on the inst rum ent autom at ically det ect s t he probes fit t ed w it h
SI CRAM m odule: the type of probe is configured by t he inst rument and cannot be
m odified by the user.
I f dir ect 4 w ire "Pt 100" probes t hat are not m anufact ured by "Delt a OHM" are
connect ed t o t he inst rum ent, t he N O_ PRBE_ SER_ N U M m essage is displayed .
- use t he and arrows ( respect ively locat ed above t he HOLD and REL key s) t o
m odify t he disp lay ed value;
- press D ATA/ EN TER to confirm t he m odificat ion and go ont o t he next it em ;
- press CLR/ ESC t o cancel t he m odificat ion ;
- to e x itt he m enu, press t he U N I T/ M EN U key again.

HD2304 - 11 - V1.8
PROBES AN D M EASUREM EN TS
The inst rum ent m easures absolute, relat iv e and different ial pressure using t he PP471
SI CRAM m odule and t he TP704 and TP705 series probes. I t also m easures the
t em perat ure with a Pt 100 sensor wit h SI CRAM m odule or wit h direct 4 w ire Pt 100
probes.
The SI CRAM m odule acts as an interface bet ween the sensor on t he probe and t he
inst rum ent . There is a m icroprocessor circuit wit h a perm anent m em ory inside t he
m odule t hat enables t he inst rum ent t o recognize t he type of probe connect ed and to
read it s calibr at ion infor m at ion.
The probes are detected during turn on, and t h is cannot be perfor m ed w hen
the inst rum en t is already on, t herefore if a probe is connect ed and the
instrum ent is on, it is necessa ry t o t ur n it off and on .
The probes fit t ed wit h SI CRAM m odule are calibrat ed in t he fact ory; no calibrat ion is
required by the user.
PP4 7 1 MODULE FOR PRESSURE M EASUREM EN T
The PP471 m odule act s as an interface between t he TP704 and TP705 series Delt a
OHM probes and t he inst rum ent. The TP7 0 4 series pressure probes have a 1/ 4" BSP
t hreaded m ale connect ion, and m ust be screwed into the syst em using t he necessary
sealing gasket s. The TP7 0 5 series hav e t w o Ø5 connect ions w her e t he suit able t ubes
ar e insert ed in order t o perform t he desir ed m easurem ent.
Ca u t ion ! Please pay careful at tent ion t o t he j oint pressure sealing; use suit able
gask et s and j oint s. The t hreaded connect ion is prot ect ed by a plast ic cap. Put it back
after use as it prot ect s the pressure cell from foreign bodies.
I MPORTAN T! En sure t h e pr obe's bot t om scale is h igher t h a n t h e pr essu re t hat
w ill be m easur e d. I n case this value is unknow n, start by using h igher-
ca pacit y prob es.
For eve r y pre ssure pr obe a range of overload pressure and a bur st pressu r e
are declared: pressur es in t he range of overload pr essu r e don’t ca use t h e
break of t h e sensor but t he decla r ed accuracy ca n be over com e. Pr e ssure over
the stat e d bu r st pressu r e m a y break the sensor. The applicat ion of h igher
pr essures t han t he overload pr e ssure lim it , although low er t han t he bu r st
pressure, m ay produ ce perm anent dam age t o t h e probe ( e.g. offset sh ift ) .
N e ver e x ce e d t h e st a t ed b urst pr essu re ( se e Te ch nica l Ch ar act e r ist ics of t he
pr obes a t p a ge x x )
Upon t urning on t he inst rum ent aut om at ically det ect s t he PP471 m odule. The probe's
t ype ( absolut e, r elat iv e or differ ential) and bot t om scale value are det ect ed even
when the inst rum ent is on (see chapt er 3).
To change t he inst antaneous or peak value unit of m easurem ent , press UNI T. The
following unit s of m easurem ent are available:
Pa, hPa, kPa, m bar, bar, at m , m mHg, m m H2O, kgf/ cm 2, PSI , inchHg, inchH2O.
Som e unit s of m easurem ent require a degr ee of m ult iplicat ion:
•the "-3" sym bol indicates the displayed value m ust be div ided by 1,000;
•the "3" and "6" sym bols indicate t he displayed value m ust be m ult iplied
respect ively by 1,000 or by 1,000,000.
The inst rum ent does not aut om at ically det ect t he probes which are not fit t ed w it h
SI CRAM m odule.

HD2304 - 12 - V1.8
Pt 100 TEM PERATURE PROBES
The inst rum ent accept s the input of plat inum t em perat ure probes wit h resistances of
100Ω (Pt100).
The Pt 100 sensors are connect ed t o 4 w ir es; t he excit at ion cur rent was chosen in
order t o m inim ize t he sensor self-heating effect s.
All probes w it h m odu le are calibrat ed in t he fact ory; no calibrat ion is usually r equir ed
by the user.
The ° C or ° F unit of m easurem ent can be chosen using the UN I T key.
TEM PERATURE M EASUREM EN T
The response t im e for the measurem ent of the tem perat ure in air is great ly reduced if
t he air is m ov ing. I f t he air is st ill, st ir t he probe. Please rem em ber t hat t he r esponse
t im es in any case are longer t han t hose for liquid m easurem ents.
The t em perat ure m easurem ent by im m e rsion is carried out by inserting the probe in
t he 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 penet ra t ion t he pr obe tip m ust be inserted to a
depth of at least 60 m m , t he sensor is housed in the end part of the probe.
N OTE: w hen m easuring t he t em perat ure on frozen blocks it is convenient to use a
m echanical t ool t o bor e a cav it y in w hich t o insert t he t ip probe.
I n order to perform a correct cont act m easurem ent , the m easurem ent surface m ust
be even and sm oot h, and the probe m ust be perpendicular t o t he m easurem ent plane.
So a s t o obt a in t h e cor r ect m e asur em e n t , t he inse r t ion of a dr op of oil or
h eat -con duct ive past e betw een t he surface and t he probe is useful ( do not
use w ater or solve nt s) . This m ethod also im proves t he response tim e.
CON N ECTI N G T H E TP4 7 CON N ECTOR
All probes produced by Delt a Ohm are provided with a connect or.
The HD2 3 0 4 also wor k w it h direct 4 wire Pt 100 pr obes 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
the probe’s wires should be welded.
The inst ruct ions t o connect t he Plat inum pr obe t o t he TP4 7 m odule are pr ov ided
below.
The TP4 7 m odule is supplied com plet e wit h fairlead and gasket for 5 m m m axim um
diam et er cables. Do t he following t o open t he m odule and connect a pr obe:
1. unscrew t he fairlead;
2. extract the gasket ;
3. r em ove t he label using a cut t er;

HD2304 - 13 - V1.8
4. unscr ew t he r ing on t he opposit e side as illust r at ed in t he figure:
5. open the t wo 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 t he 1…4 point s on which t he
sensor wires m ust be w elded. The JP1…JP4 j um per s ar e in t he cent er of t he board.
These m ust be closed w it h a t in bead for som e type of sensors:
1
2
3
4
Pt100 3 fili
Pt1000
Ni1000
Not Used
Ca u t ion ! Before welding, pass the probe cable t hrough t he fairlead and gasket .
6. Weld t he wires as shown in the t able:
Sensor
Boar d con nect ion
Ju m p er t o close
Pt100 4
wires
4JP4
3JP3
1JP1
2 JP2
Pt100
4 wires
None
Ensure t he welds are clean and perfect .
7. Once the welding operation is com plet e, close t he t wo shells;
8. insert the gasket in the m odule;
9. screw the fairlead and the ring.
10. At t he other end of t he module, enter t he ring wit h the 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 the
probe is ready.

HD2304 - 14 - V1.8
DIRECT CON N ECTI ON OF 4 - W I RE Pt 1 0 0 SEN SOR
4 w ire Pt 1 0 0 sensors can be
soldered dir ect ly t o t he pins of
t he flying fem ale connect or
wit hout m aking use of t he TP47
board. The 4 w ires of t he Pt100
sensors have t o be soldered as
indicated in the figure on t he left .
I n order t o use t his t ype of probe
it is necessary to set up t he
m enu it em “ Probe Type” as
described at page 10.
The P100 probe is recognized
upon t urning on the inst rum ent:
connect t he probe when the
inst rum ent is swit ched off and
then turn it on.
Sensor
D ir e ct sold erin g t o t h e
conn e ct or
Pt100 4
wires
View of the soldering side
of the flying fem ale connect or

HD2304 - 15 - V1.8
I N STRUM EN T SI GN ALS AN D FAULTS
The following t able list s all of t he indicat ions displayed by t he inst rum ent in different
operating and error sit uations.
D ispla y indica t io ns Ex p la nat ion
PROB
COM M LOST
This appear s if t he SI CRAM m odule connect ed t o t he channel
has already been det ect ed by t he inst rum ent, but is
disconnect ed. At the sam e tim e an interm it tent beep is issued.
OVER
Measu rem en t over flow : t his appear s if t h e p ressu re sen sor
ex ceeds t h e lim it of 1 20% of t h e full scale nom inal value. Ov er
125% , the display indicat es ERR.
Measu rem en t ov er flow : t his appear s if t he ex t er nal
t em perat ure probe is m easu rin g a v alu e ex ceedin g t h e set
m easuring range.
ERR
This appears in t he m enu if a module has already been
det ect ed by t he inst rum ent, but is disconnect ed.
PROB
ERR
A pr obe w it h SI CRAM m odu le h as been insert ed w hen n ot
adm issible for t hat specific inst r um ent .
SYS
ERR
#
I nst r um ent m anagem en t program error . Contact t he
inst rum ent ’s supplier and com m unicat e t he num eric code #
rep or t ed by t he display.
CAL
LOST
Pr ogram er ror : it appear s aft er t urn in g on for a few seconds.
Cont act t he inst rum ent’s supplier.
BATT TOO LOW
CH N G N OW
I ndicat ion of insufficient bat t ery charge appearing on t urning
on. The inst rum ent issues a long beep and turns off. Replace
t he bat t eries.
# # # BAR ABS
Probe # # # bar absolut e.
# # # BAR D I FF
Pr obe # # # bar differ ent ial.
# # # BAR GAUG
Pr obe # # # bar r elat iv e.
# # # BAR SG
Pr obe # # # bar r elat iv e com par ed t o 1 bar .
# # # m BAR ABS
Probe # # # mbar absolut e.
# # # m BAR DI FF
Probe # # # mbar differential.
# # # m BAR GAUG
Probe # # # mbar relat iv e.
PROB_ SER # # # # # # # #
Serial num ber # # # # # # # # of t he probe connect ed t o t he
input.
ERR
Error.
FUN C CLRD
Max, m in and average v alues cleared.
NEW PROBE D ET New probe det ect ed at t he input
PLS_ EX I T > > > FU N C
RES_ FOR_ FACT ON LY
P
lease ex it u sin g ESC > > > funct ion r eserv ed t o fact or y
calibration.
PRES_ REL_ TO_ ZERO
EN TR_ TO_ M EN U Pr ess REL t o r eset p robe or ENTER t o access m en u.
pr ob ERR
Error – unex pect ed probe.
SYS ERR #
Program error num ber # .

HD2304 - 16 - V1.8
W ARN I N GS
1. Do not expose the pr obes to gases or liquids that could corrode the m at erial of t he
sensor or the probe it self. Clean the probe carefully aft er each m easurem ent. Som e
pressure probe m odels are suit able for m easurem ent of non-corrosive gases or air
and dry and not liquid only: check the m em brane com pat ibility with t he plant fluid.
2. Do not bend the probe connect ors or force them upward or downward. Do not bend
or force t he cont act s when inserting the probe connect or int o t he inst r um ent .
3. Do not bend, deform or drop t he probes, as this could cause irreparable dam age.
4. Alw ays select t he m ost suit able probe for your applicat ion.
5. Do not use the t em 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 contact probe
cont ainer is m ade from AI SI 316 st ainless st eel plus silver. Avoid cont act bet ween
t he pr obe sur face and any st icky surface or product t hat could cor rode or dam age it .
6. Above 400° C and below –40° C, avoid v iolent blows or t herm al shock s to Plat inum
t em perat ure probes as t his could cause irreparable dam age.
7. To obt ain reliable m easurem ent s, t em perat ure var iat ions t hat are t oo rapid m ust be
avoided.
8. Tem perat ure probes for surface m easur em ent s ( contact probes) 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 probe in order t o im prove contact and reduce reading t im e.
Whatever you do, do not use wat er or solvent for t his purpose. A contact
m easurem ent is alw ay s very har d t o perfor m . I t has h igh lev els of uncert aint y and
depends on t he abilit y of t he oper at or.
9. Tem perat ure m easurem ent s on non-m et al surfaces usually r equire a great deal of
t im e due t o t he low heat conduct iv it y of non-m et al m at erials.
10. Probes are not insulat ed from t heir ex ternal casing; be very careful not t o
com e into contact wit h live part s ( abov e 48V) . This could be ext rem ely
dangerous for t he inst r um ent as well as for t he operat or, w ho cou ld be
elect rocuted.
11. Avoid taking m easur em ents in presence of high frequency sour ces, m icrowave
ovens or large m agnet ic fields; result s m ay not be very r eliable.
12. Clean t he probe carefully aft er use. Clean t he probe pressure cham ber carefully.
Av oid deposit s or incr ust at ions lef t by t he fluid com ing int o contact w it h t he
m em brane, as wit h t im e t his could cause m easurem ent er ror s.
13. Avoid inserting nails or spikes int o t he pressure cham ber as the m em brane could be
un int ent ionally t or n.
14. I n order t o fix the probes, use a suit able fixed wrench, and possibly sealing gasket s.
15. Gr e at a t t en t ion m u st be pa id w hile in st alling t h e pr obes in cont a in e rs a nd
tubes under pressu r e . Also pay att ent ion t o the probe s’ bot t om
sca le . I n a ddit ion t o t h e ir r e pa r a ble da m a ge , it ca n e v e n ca u se
se riou s ph ysica l da m a ge t o bot h the oper ator and t hings. Before t he
pr obe a stop valve should alw ays be present . Ensure t h a t the plant is not
subject t o abnorm a l or u nex pected depr esse d fluid fluct uations.
16. The inst rum ent is water resistant and I P67, but should not be im m ersed in water.
The pr obe connect ors m ust be fit ted w it h sealing gasket s. Should t he inst r um ent fall
int o t he w at er , check for any wat er infilt rat ion. Gent ly handle t he inst rum ent in such
a way as t o prev ent any wat er infilt rat ion from t he connect ors’ side.

HD2304 - 17 - V1.8
I N STRUMEN T STORAGE
I nst rum ent st or age condit ions:
•Tem perat ure: -25…+ 65° C.
•Hum idity: less t han 90% RH wit hout condensat ion.
•Do not st ore t he inst rum ent in places where:
•hum idit y is high;
•the inst rum ent m ay be exposed t o 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 st rong vibrat ions;
•t he inst rum ent m ay be exposed t o st eam , salt or any corrosive gas.
The inst rum ent case is m ade of ABS plast ic: do not use any incom patible solvent for
cleaning.

HD2304 - 18 - V1.8
LOW BATTERY W ARN I N G AN D BATTERY REPLACEM EN T
The batt ery sym bol
on t he display const antly shows t he battery charge st atus. To t he extent t hat batt er ies
have discharged, t he sym bol " em pt ies". When t he charge decr eases st ill furt her it
st arts blinking.
I n t his case, bat ter ies should be replaced.
I f you continue t o use it , the instrum ent can no longer ensure correct m easurement.
However, t he m em ory dat a are m aintained.
I f t h e bat t er y ch ar ge le ve l is in su fficie n t , t h e follow ing m e ssa ge a ppe ar s
w h en you turn the inst rum ent on:
BATT TOO LOW
CH N G N OW
The in st rum ent issues a long beep and turns off. I n t his ca se, repla ce t he
ba t teries in or der t o t urn t he instrum ent back on .
To replace the batt eries, proceed as follows:
1. switch t he inst rum ent off;
2. unscrew the bat tery cover count er clockwise;
3. r eplace t he bat t er ies ( 3 1.5V alkaline bat teries - t ype AA) ;
4. screw t he cover on clockwise.
M alf un ct ion ing u pon t urnin g on a ft e r bat tery r epla ce m en t .
After replacing t he bat teries, the inst rum ent m ay not rest ar t correct ly; in t his case,
repeat t he operation.
After disconnect ing t he bat teries, wait a few m inutes in order t o allow circuit
condensers t o discharge com plet ely; t hen r einsert t he bat ter ies.
WARN I N G ABOUT BATTERY USE
•Bat t eries should be rem oved w hen t he inst rum ent is not used for an ext ended
t im e.
•Flat bat teries m ust be replaced im m ediately.
•Avoid bat t eries leaking.
•Alway s use good qualit y leakproof alkaline bat t eries. Som et im es on t he m arket , it
is possible t o find new bat t eries wit h an insufficient charge capacity.

HD2304 - 19 - V1.8
NOTES ABOUT W ORKI NG AN D OPERATI VE SAFETY
Au t hor ized u se
The t echnical specificat ions as given in chapt er TECHNI CAL CHARACTERI STI CS m ust
be observed. Only t he operat ion and running of t he m easuring inst rum ent according
t o t he inst ruct ions giv en in t his operat ing m anual is aut horized. Any ot her use is
considered unauthorized.
Ge ne ra l sa fe t y in st ru ct ions
This m easuring syst em is const ruct ed and t est ed in com pliance w it h t he EN 61010-1
safet y regulat ions for elect ronic m easuring inst rum ent s. I t left t he fact ory in a safe
and secure t echnical condit ion.
The sm ooth funct ioning and operat ional safet y of t he m easuring syst em can only be
guaranteed if t he generally applicable safet y m easures and t he specific safety
instruct ions in t his oper at ing m anual are followed during 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 env ir onm ent al and elect rical operat in g condit ions t hat are in
specified in chapter TECHNI CAL CHARACTERI STI CS.
Do not use or store the product in places such as list ed below:
•Rapid changes in am bient tem perat ure which m ay cause condensation.
•Corrosive or inflam m able gases.
•Dir ect v ibr at ion or shock t o t he inst rum ent .
•Excessive induct ion n oise, st at ic elect ricit y, m agnet ic fields or noise.
I f t he m easuring syst em was transport ed from a cold environm ent t o a warm
environm ent, t he form at ion of condensat e can im pair the funct ioning of t he m easuring
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 put ting the m easuring syst em back int o operation.
Obligations of t he purchaser
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 dir ect ives for prot ectiv e labour legislat ion
Nat ional pr ot ect iv e labour legislat ion
Safet y r egulat ions

HD2304 - 20 - V1.8
TECHN I CAL CHARACTERI STI CS
TECH N I CAL CH AR ACTERI STI CS OF THE MAN OM ETER- THERM 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 with batt eries)
Material ABS
Display 2x4½ digit s plus sy m bols
Visible area: 52 x 42 m m
Operat ing condit ions
Operat ing tem perat ure - 5…+ 50 ° C
War ehouse t em perat ure - 25…+ 65 ° C
Wor king relat ive hum idit y 0…90% RH wit hout condensat ion
Pr ot e ct ion de gr ee of t h e ca se I P6 7
Power
Bat t eries 3 1.5V type AA batteries
Autonom y 200 hours w it h 1800 m Ah alkaline
batt eries
Power absorbed with inst rum ent off < 20 µA
Connect ions
I nput for probes 8-pole m ale DI N45326 connect or
Unit of m easurem ent Pa, hPa, KPa, m bar, bar, at m , m m Hg,
mmH2O, kgf/ cm 2,PSI , inchHg, ° C, ° F
Measurem ent of t em perat ure by I nst rum ent
Pt100 m easurem ent range - 200…+ 650 ° C
Resolution 0.1 ° C
Accuracy ±0.1 ° C
Drift aft er 1 year 0.1 ° C/ year