wtw pH 330i User manual

ba52311edfs04 06/2004
ba52311edfs
pH 330i
pH 340i
Operating manual
Bedienungsanleitung
Mode d’emploi
Instrucciones de operación
pH/mV Pocket Meter Page 3
pH/mV Taschenmeßgerät Seite 17
pH/ mV- mètres de poche Page 31
pH/ mV Medidor manual Página 45
AR
M
O
PH
6
4
2
992
6
°
C
TP
RCL
STO
CAL

pH 330i/340i
2
Note to this
operating manual This operating manual contains a description of
lall basic functions,
lall instructions for a safe operation, and
lall technical data in a compact form.
A more detailed description with notes for special applications is available as
a pdf document via internet under http://www.WTW.com.
Hinweise zu dieser
Bedienungs-
anleitung
Diese Bedienungsanleitung enthält in kompakter Form
ldie Beschreibung aller Grundfunktionen,
lalle Hinweise für den sicheren Betrieb und
lalle technischen Daten.
Eine ausführlichere Beschreibung mit Hinweisen für besondere Anwendun-
gen ist als pdf-Dokument im Internet unter http://www.WTW.com erhältlich.
Remarque àce
mode d’emploi Ce mode d'emploi contient sous forme compacte
lla description de toutes les fonctions de base et
ltoutes les informations assurant un fonctionnement sûr, ainsi que
ltous les données techniques.
Une description plus étendue contenant les informations sur des emplois
spéciaux peut être obtenue sous forme pdf dans l'internet sous http://
www.WTW.com.
Observación
a estas
instrucciones
Este manual de instrucciones incluye la descripción en forma resumida de
ltodas las funciones básicas,
ltodas las observaciones que le garantizan el
lfuncionamiento normal y seguro, asimismo todo las especificaciones y
datos técnicos.
En el internet, bajo http://www.WTW.com encuentra Ud. una descripción
más detallada, en formato pdf, para aplicaciones especiales.
Copyright ©Weilheim 2004, WTW GmbH

pH 330i/340i List of contents
3
pH 330i/340i - List of contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display and jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Mains power (pH 340i only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Switching on the measuring instrument . . . . . . . . . . . . . . . . . . 5
Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Saving data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Outputting the data memory. . . . . . . . . . . . . . . . . . . . . . . . . . 11
Transmitting data (only pH 340i) . . . . . . . . . . . . . . . . . . . . . . 11
Configuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Resetting to default settings. . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Safety pH 330i/340i
4
Safety
Safety
instructions The individual chapter of this operating manual use the following safety in- struction to indicate various types of danger:
Warning
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Display and jack field
Display
Jack field
Warning
Only connect electrodes to the measuring instrument that do not return any
unallowed voltages or currents (> SELV and > current circuit with current lim-
iting).
Almost all electrodes - in particular WTW electrodes - fulfill these conditions.
Status display indicator
Measured value display
Function and
Temperature display
Sensor symbol
%
°F
S
TempError
mg/L
% ppm
mol/L
ISE
RCL
8
8.
8
888
8
mV/pH
°C
LoBat
AutoCal DIN
CalError
ARng AR
AutoCal TEC
TP
1
UpH
Time
Baud
Day.Month No.
Ident
Year
Auto Store
ConCal
1pH electrode 4Temperature sensor
2Reference electrode 5RS232 interface or analog output/
recorder (only pH 340i)
3Plug-in power supply (only
pH 340i)
Ref
5
123
4

pH 330i/340i Mains power (pH 340i only)
5
Mains power (pH 340i only)
You can either operate the measuring instrument with batteries or with the
plug-in power supply. The plug-in power supply provides the measuring in-
strument with low voltage (7.5 V ... 12 V DC). This saves the batteries.
Warning
The line voltage at the operating site must lie within the input voltage range
of the original plug-in power supply (see TECHNICAL DATA).
Warning
Only use original plug-in power supplies (see TECHNICAL DATA).
Switching on the measuring instrument
Ref
2
1
3
lPlug the jack (1) into the socket (2) of the measuring instrument.
lConnect the original WTW plug-in power supply (3) to an easily accessi-
ble mains socket.
lPress the <>key.
Display test appears briefly on the display.
After this, the measuring instrument automatically switches to the mea-
suring mode. The display shows the relevant measured value.

Measuring pH 330i/340i
6
Measuring
Overview of the measuring modes:
Special functions:
Select pH
resolution If you press <M> while pressing the <RUN/ENTER> key, the resolution swaps between 0.01 and 0.001.
AutoRead
(drift control) The AutoRead function checks the stability of the measurement signal (ex- cept for the measurement of the ORP voltage). Activate AutoRead with
<AR>. Press <RUN/ENTER> to start the AutoRead measurement. During
the AutoRead measurement, AR flashes on the display until a stable mea-
sured value is reached. This can be terminated at any time taking over the
current measured value with <RUN/ENTER>.
Temperature
measurement
during pH
measurements
You can use pH electrodes with and without temperature sensors. The mea-
suring instrument recognizes which temperature sensors are connected and
switchesautomaticallyto thecorrectmodeforthetemperaturemeasurement
(display TP).
Manual temperature input: Set the temperature value with <▲> <▼>.
pH value Redox-
voltage
mV
<M>

pH 330i/340i Calibration
7
Calibration
AutoCal TEC This process is specially adapted to the WTW technical buffer solutions as a
fully automatic single, two-point or three-point calibration. The buffer so-
lutions are automatically recognized by the measuring instrument. Depend-
ing on the instrument setting, the instrument displays the relevant buffer
nominal value or the current electrode voltage in mV.
Valid buffer (values at 25 °C): 2.00 / 4.01 / 7.00 / 10.01
Note
The calibration for pH 10.01 is optimized for the WTW technical buffer solu-
tion TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead to an er-
roneous calibration. The correct buffer solutions are given in the WTW
catalog or in the Internet.
AutoCal DIN as AutoCal TEC, but matched to buffer solutions according to DIN 19266.
Valid buffer (values at 25 °C): 1.679 / 4.006 / 6.865 / 9.180
ConCal is the conventional two-point calibration using two buffer solutions (pH 7.0
± 0.5 and any other buffer solution) or a single-point calibration using any
buffer solution and is used as a high-speed method.
Calibration
evaluation After calibrating, the measuring instrument automatically evaluates the cali- bration. The asymmetry and slope are evaluated separately. The worst eval-
uation appears on the display.
Display Asymmetry[mV] Slope [mV/pH]
-15 ... +15 -60.5 ... -58
-20 ... +20 -58 ... -57
-25 ... +25 -61 ... -60.5
or
-57 ... -56
Clean the electrode according
to the electrode operating
manual
-30 ... +30 -62 ... -61
or
-56 ... -50
E3
Invalid calibration
< -30 or > 30 < -62 or > -50

Calibration pH 330i/340i
8
Note
If a printer isconnectedto theinterface, a calibrationprotocol is automatically
printed after a valid calibration.
AutoCal TEC / AutoCal DIN procedure:
The following example shows the AutoCal TEC calibration. In the
AutoCal DIN calibration, Cd... instead of Ct... appears on the display. Other-
wise, both procedures are identical.
lConnect the pH electrode to the measuring instrument.
lPress the <CAL> key repeatedly until the display Ct1 and the function dis-
play AutoCal TEC appears. The sensor symbol displays the evaluation of
the last calibration (or no sensor symbol in the delivery state or after the
measurement parameter has been reset).
lImmerse the pH electrode into the first buffer solution.
lWhen measuring without a temperature sensor:
Enter the temperature of the first buffer solution with <▲> <▼>.
lPress <RUN/ENTER>. The AutoRead measurement begins. The elec-
trode voltage (mV) or the buffer nominal value appears on the display. If
the measured value is stable, Ct2 appears.
Note
At this point, the AutoCal TEC calibration can be terminated with
<M>. This correspondstoasingle-point calibration. To do this,
the instrument uses the Nernst slope (-59.16 mV/pH at 25 °C)
and determines the asymmetry of the electrode.
lImmerse the two-point calibration pH electrode in the second buffer so-
lution to continue.
lWhen measuring without a temperature sensor:
Enter the temperature of the second buffer solution with <▲> <▼>.
lPress <RUN/ENTER>. The AutoRead measurement begins. The elec-
trode voltage (mV) or the buffer nominal value appears on the display.
lIf the measured value is stable, the instrument displays the value of the
slope and the evaluation of the two-point calibration.
lPress <RUN/ENTER>. The instrument displays the value of the asymme-
try.
8
4
2
1C t
°C
TP
pH
AutoCal TEC
8
4
2
2C t
°C
TP
pH
AutoCal TEC
pH
45 9
mV/pH
-
pH
2
mV

pH 330i/340i Calibration
9
Note
At this point, the AutoCal TEC calibration can be terminated with
<M>. This corresponds to a two-point calibration.
lImmerse the pH electrode in the second buffer solution to continue the
two-point calibration.
lWhen measuring without a temperature sensor:
Enter the temperature of the third buffer solution with <▲> <▼>.
lPress <RUN/ENTER>. The AutoRead measurement begins. The elec-
trode voltage (mV) or the buffer nominal value appears on the display.
lIf the measured value is stable, the instrument displays the value of the
slope and the evaluation of the three-point calibration.
lPress <RUN/ENTER>. The instrument displays the value of the asymme-
try.
lSwitch to the measuring mode with <M>.
8
4
2
3C t
°C
TP
pH
AutoCal TEC
pH
85 8
mV/pH
-
pH
0
mV

Calibration pH 330i/340i
10
ConCal procedure:
lConnect the pH electrode to the measuring instrument.
lPress the <CAL> key repeatedly until the display ASY and the function
display ConCal appears. The sensor symbol displays the evaluation of
the last calibration (or no sensor symbol in the delivery state or after the
measurement parameter has been reset).
lImmerse the pH electrode in the first buffer solution
(pH 7.0 ± 0.5 in two-point calibration).
lWhen measuring without a temperature sensor:
Enter the temperature of the first buffer solution
with <▲> <▼>while pressing the <RUN/ENTER> key.
lPress the <RUN/ENTER> key.
The measured pH value appears on the display.
lSet the measured value to the nominal pH value of the buffer solution(at
the current temperature) with <▲> <▼>.
lIfthemeasuredvalueis stable,pressthe<RUN/ENTER> key. Thevalue
of the asymmetry appears.
lPress the <RUN/ENTER> key. SLO appears.
Note
At this point, the ConCal calibration can be terminated with
<M>. This corresponds to a single-point calibration. To do
this, the instrument uses the Nernst slope (-59.16 mV/pH at
25 °C) and determines the asymmetry of the electrode.
lImmerse the two-point calibration pH electrode in the secondbuffer so-
lution to continue.
lWhen measuring without a temperature sensor:
Enter the temperature of the second buffer solution with <▲> <▼>while
pressing the <RUN/ENTER> key.
lPress <RUN/ENTER>.
lSet the measured value to the nominal pH value of the buffer solution(at
the current temperature) with <▲> <▼>.
lWhen the measured value is stable, press the <RUN/ENTER> key. The
instrument displays the value of the slope and the calibration evaluation.
lPress <RUN/ENTER>. The instrument displays the value of the asym-
metry.
lSwitch to the measuring mode with <M>.
YAS
TP
pH
ConCal
8
4
2
°C
307 1
pH
ConCal
TP
8
4
2
°C
5
2
OS L
°C
TP
pH
ConCal
554 7
pH
ConCal
TP
8
4
2
°C
pH
25 9
mV/pH
-
pH
3
mV