wtw Cond 315i User manual

ba52309edfs
pH 315i
ba52309edfs03 06/2004
Operating manual
Bedienungsanleitung
Mode d’emploi
Instrucciones de operación
pH/mV Pocket Meter Page 3
pH/mV Taschenmeßgerät Seite 13
pH/ mV- mètres de poche Page 23
pH/ mV Medidor manual Página 33
PH
6
4
2
99
6
°
C
TP
AR
CAL
M
O

pH 315i
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 315i List of contents
3
pH 315i - List of contents
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display and jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Switching on the measuring instrument . . . . . . . . . . . . . . . . . . 5
Measuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Configuring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Resetting to default settings. . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Safety pH 315i
4
Safety
Safety
instructions The individual chapters of this operating manual use safety instructions such as that shown below to indicate various hazards or dangers:
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
ConCal
Auto Store
Time
Baud
Day.Month No.
Ident
Year
RCL
TempError
mg/L
% ppm
mol/L
ISE
8
8.
8
888
8
mV/pH
°C
UpH
LoBat
AutoCal DIN
CalError
ARng AR
AutoCal TEC
TP
1
1pH electrode
2Reference electrode
3Temperature probe
Ref
12
3

pH 315i Switching on the measuring instrument
5
Switching on the measuring instrument
Measuring
Overview of the measuring modes:
Special functions:
Selecting the 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. Acti- vate AutoRead with <AR>. The current measured value is frozen. Thus, the
<AR> key can also be used as a "hold function" to freeze the measured val-
ues. Press <RUN/ENTER> to start the AutoRead measurement. During the
AutoRead measurement, AR flashes on the display until a stable measured
value is reached. This can be terminated at any time taking over the current
measured value with <RUN/ENTER>.
Temperature
probe Basically, pH measurements should only be performed with a temperature probe. The temperature probe is shown on the display by TP.
If you nevertheless use an electrode without a temperature probe, the instru-
ment operates with a reference temperature of 25 °C. Thus, the sample and
calibration solution must have their temperatures adjusted to 25 °C in order
to avoid larger measurement errors.
Note
The pH meter automatically recognizes the type of temperature probe used.
This enables electrodes to be connected with NTC30 or Pt1000.
lPress the <>key.
Display test appears briefly on the display.
Subsequently, the slope and asymmetry used appear for approx. one
second one after the other. In addition, the calibration procedure of the
last calibration is shown (AutoCal TEC or AutoCal DIN or no display in
the delivery state or following initialization).
pH value Redox-
voltage
mV
<M>

Calibration pH 315i
6
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): 2.000 / 4.006 / 7.000 / 10.011
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
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

pH 315i Calibration
7
AutoCal TEC / AutoCal DIN procedure:
The following example shows the AutoCal TEC calibration. In the
AutoCal DIN calibration, Cd... appears on the display instead of Ct....
Otherwise, both procedures are identical.
Note
During the calibration, the portable instrument pH 315i automatically recog-
nizes the nominal value of the buffer solution used. Depending on the instru-
ment setting, either the current electrode voltage or the buffer nominal value
is displayed during the calibration procedure. For details of selecting the dis-
play, see CONFIGURATION.
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 in the first buffer solution.
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,
theinstrumentusestheNernstslope(-59.2 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.
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 calibration in calibration range I.
lPress <RUN/ENTER>. The instrument displays the value of the asymme-
try in calibration range I.
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

Configuring pH 315i
8
Configuring
The following setting can be adapted individually to your requirements (the
delivery status is shown in bold typeface):
Procedure for configuring (factory settings appear in bold typeface):
Note
At this point, the AutoCal TEC calibration can be terminated with
<M>. This corresponds to a two-point calibration. The instru-
ment uses the slope and the asymmetry of calibration range I.
lImmerse the pH electrode in the second buffer solution to continue the
two-point calibration.
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 calibration in calibration range II.
lPress <RUN/ENTER>. The instrument displays the value of the asymme-
try in calibration range II. The three-point calibration is completed.
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
Display during pH calibration Buffer nominal value, or current
electrode voltage
lSwitch off the measuring instrument.
lWhile pressing the <M> key, press <>.
lSelect the required display during the pH calibration with <CAL>.
Selection:Buffer nominal value (/pH) or current electrode voltage (mV).
lThen press the <RUN/ENTER> key. The measuring instrument automat-
ically switches to the measuring mode.
LC A
pi sd
/pH

pH 315i Resetting to default settings
9
Resetting to default settings
Default
settings The following settings are reset to the status on delivery when a reset is per- formed (initialized):
Reset procedure:
lPress <CAL> while pressing the <RUN/ENTER> key.
lPress<RUN/ENTER> to reset the measurement parameters. The instru-
ment changes to the measuring mode.
nI
I
p
H

Technical data pH 315i
10
Technical data
Dimensions
and weight
Mechanical
structure
Electrical
safety
Test certificates
Ambient
conditions
pH/ORP
measuring ranges
Length [mm] 172
Width [mm] 80
Height [mm] 37
Weight [kg] approx. 0.3
Type of protection IP 66
Protective class III
cETLus, CE
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Climatic class 2
Measuring range Resolution
pH -2.000 ... +16.000
- 2.00 ... + 16.00 0.001 0.01
U [mV] - 999.9 ... + 999.9
- 1999 ... + 1999 0.1 1
T [°C] - 5.0 ... + 105.0 0.1