Operating manual
AR
O
6
7
1
9
2
7
O
°
C
m
g/l
ARng
TP
RCL
STO
C
A
L
M
handylab Ox 12
ba75369d04 01/2011
Oxygen Meter
handylab LF 12
Accuracy when
going to press
Warranty We guarantee the instrument described for 3 years from the date of
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument. Also, we cannot guarantee that there are absolutely no errors in this manual. Therefore, we are sure you will understand that we cannot accept
any legal claims resulting from the data, figures or descriptions.
purchase.
The instrument warranty covers manufacturing faults that are discovered within the warranty period. The warranty does not cover components that are replaced during maintenance work, e.g. batteries.
The warranty claim extends to restoring the instrument to readiness for
use but not, however, to any further claim for damages. Improper handling or unauthorized opening of the instrument invalidates any warranty claim.
Copyright
© 2011, SI Analytics GmbH
Reproduction in whole - or even in part - is prohibited without the
express written permission of SI Analytics GmbH, Mainz.
Printed in Germany.
2
ba75369d04 01/2011
handylab Ox 12 List of contents
handylab Ox 12 - List of contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Switching on the measuring instrument . . . . . . . . . . . . . . . . . 17
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.2 Measuring the D. O. concentration . . . . . . . . . . . . . . . 19
4.2.3 Measuring the D. O. saturation . . . . . . . . . . . . . . . . . 20
4.2.4 Measuring the D. O. partial pressure . . . . . . . . . . . . . 20
4.2.5 Selecting the measuring range, AutoRange . . . . . . . . 21
4.2.6 AutoRead AR (drift control) . . . . . . . . . . . . . . . . . . . . 21
4.3 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.1 Calibrating with the air calibration vessel . . . . . . . . . . 25
4.3.2 Calibrating via a comparison measurement . . . . . . . . 27
4.3.3 Entering the salt content (salinity) . . . . . . . . . . . . . . . 29
4.4 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.4.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.4.2 Saving automatically . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.4.3 Outputting the data storage . . . . . . . . . . . . . . . . . . . . 34
4.4.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.5 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.5.1 Data transmission interval (Int 2) . . . . . . . . . . . . . . . . 39
4.5.2 Recorder (analog output) . . . . . . . . . . . . . . . . . . . . . . 40
4.5.3 PC/external printer (RS232 interface) . . . . . . . . . . . . 41
4.5.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
4.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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3
List of contents handylab Ox 12
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 47
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4
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handylab Ox 12 Overview
AR
O
6
7
1
9
2
7
O
°
C
m
g/l
ARng
TP
RCL
STO
C
A
L
1
2
3
M
1 Overview
The compact precision handheld meter handylab OX 12 enables you to carry
out oxygen (D. O.) measurements rapidly and reliably.
The handylab OX 12 provides the maximum degree of operating comfort, reliability and measuring certainty for all applications.
The proven calibration procedures and the special AutoRead function support you in your work with the handylab OX 12.
1 Keypad
2 Sample display
3 Jack field
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5
Overview handylab Ox 12
CAL
STO
RCL
RUN/ENTER
AR
M
M
STO
CAL
RCL
AR
RUN/ENTER
1.1 Keypad
Key functions
Select the measuring mode <M>:
– D. O. concentration
– D. O. saturation
– D. O. partial pressure
Save a measured value
<STO>
Switch measuring instrument on/off
<ON/OFF>
Select the calibration procedure <CAL>
Display/transmit measured values
<RCL>
Activate/deactivate the AutoRead function
<AR>
Switch on the salt content correctionIncrease values, scroll
<▲>
6
Switch off the salt content correctionDecrease
values, scroll
<▼ >
Confirm entries, start AutoRead
<RUN/ENTER>
ba75369e04 01/2011
handylab Ox 12 Overview
AutoCal DIN
AutoCal TEC
mV/pH
1/
cm
K
/
%
°
F
TDS
UpH Sal
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
RCL
Auto
Store
Time
Baud
Day.Month No.
Ident
Year
S
8
8.
8
8
8
8
O
C
%
mg/l
LoBat
ARng
AR
TP
1
Cal
°
mbar
Sal
Status display
Meas. value display
Function and
temperature display
Sensor symbol
3
1
2
1.2 Display
1.3 Jack field
ba75369e04 01/2011
1 D. O. probe
2 Plug-in power supply (optional)
3 Serial interface RS 232 / analog output (recorder)
Caution
Only connect probes to the measuring instrument that cannot return any voltages or currents that are not allowed
(> SELV and > current circuit with current limiting).
Nearly all probes - especially SI Analytics probes - fulfill these conditions.
7
Overview handylab Ox 12
1.4 Technical Data
Dimensions
and weight
Mechanical
structure
Electrical safety
Test certificates
Ambient
conditions
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
Relative atmospheric
< 90 % of annual average
humidity
Measuring ranges/
resolutions
Measuring range I
resolution
Measuring range II
resolution
T [°C] 0.0 ... 50.0 °C
mg/l % mbar
0 ... 19.99
0.01
0 ... 90.0
0.1
0 ... 199.9
0.1
0 ... 600
1
0 ... 199.9
0.1
0 ... 1250
1
8
ba75369e04 01/2011
handylab Ox 12 Overview
Accuracy
(± 1 digit)
Concentration
mg/l
%
saturation
± 0.5 % of the measured value
at an ambient temperature of 5 °C ... 30 °C
± 0.5 % of the measured value
when measuring in the range of
± 10 K around the calibration temperature
Partial pressure
mbar
Temperature
± 0.5 % of the measured value
at an ambient temperature of 5 °C ... 30 °C
< 2 % at 0 ... 40 °C
compensation
T [°C] ± 0.1
Correction
functions
Salinity correction 0 ... 70.0 SAL
Air pressure correction Automatic through installation of pressure
sensor in the range 500 ... 1100 mbar
Analog output Automatic switchover when a recorder is connected.
Concentration Voltage Resolution
0 ... 19.99 mg/l 0 ... 1999 mV 0.01 mg/l per 1 mV
0 ... 90.0 mg/l 0 ... 900 mV 0.1 mg/l per 1 mV
Saturation Voltage Resolution
0 ... 199.9 0 ... 1999 mV 0.1 % per 1 mV
0 ... 600 % 0 ... 600 mV 1 % per 1 mV
D. O. partial pressure Voltage Resolution
0 ... 199.9 mbar 0 ... 1999 mV 0.1 mbar per 1 mV
0 ... 1250 mbar 0 ... 1250 mV 1 mbar per 1 mV
Accuracy ± 0.5 % of the displayed value ± 0.1 (% sat-
uration)
or
± 0.5 % of the displayed value ± 0.01 mg/l
ba75369e04 01/2011
9
Overview handylab Ox 12
Internal resistance < 5 Ohm (current limited to max. 0.2 mA
output current)
10
ba75369e04 01/2011
handylab Ox 12 Overview
Serial interface Automatic switchover when a PC or printer is connected.
Type RS232, data output
Baud rate Can be set to 1200, 2400, 4800, 9600 Baud
Data bits 8
Stop bit 2
Parity None
Handshake RTS/CTS + Xon/Xoff
Cable length Max. 15 m
Power supply
Batteries 4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life Approx. 2000 operating hours
Mains FRIWO FW7555M/09, 15.1432.500-00
Friwo Part. No. 1883259
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA
Output: 9 V = / 1.5 A
Connection max. overvoltage category II
Primary plugs contained in the scope of
delivery: Euro, US, UK and Australian.
ba75369e04 01/2011
11
Overview handylab Ox 12
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to
correct the interference at his own expense.
Applicable
guidelines and
norms
EMC EC guideline 2004/108/EC
EN 61326-1
EN 61000-3-2
EN 61000-3-3
FCC Class A
Instrument safety EC guideline 2006/95/EC
EN 61010-1
ANSI/UL 61010-1
CAN/CSA-C22.2 No. 61010-1
Climatic class VDI/VDE 3540
Type of protection EN 60529
12
ba75369e04 01/2011
handylab Ox 12 Safety
2Safety
This operating manual contains basic instructions that you must follow during
the commissioning, operation and maintenance of the measuring instrument.
Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always
be available within the vicinity of the measuring system.
Target group The measuring instrument was developed for work in the field and in the lab-
oratory.
We assume that, as a result of their professional training and experience, the
operators will know the necessary safety precautions to take when handling
chemicals.
Safety
instructions
Further notes
The individual chapters of this operating manual use safety instructions such
as the label shown below to indicate various hazards or dangers:
Caution
indicates instructions that must be followed precisely in order to avoid the
possibility of slight injuries or damage to the instrument or the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manuals.
2.1 Authorized use
The authorized use of the measuring instrument consists exclusively of the
measurement of the dissolved oxygen (D. O.) content of liquid media in the
field and laboratory.
The technical specifications as given in section 1.4 T
observed. Only the operation and running of the measuring instrument according to the instructions given in this operating manual is authorized.
Any other use is considered to be unauthorized.
ECHNICAL DATA must be
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13
Safety handylab Ox 12
2.2 General safety instructions
This instrument is built and inspected according to the relevant guidelines
and norms for electronic measuring instruments (see section 1.4 T
D
ATA).
It left the factory in a safe and secure technical condition.
ECHNICAL
Function and oper-
ating safety
The smooth functioning and operational safety of the measuring instrument
can only be guaranteed if the generally applicable safety measures and the
specific safety instructions in this operating manual are followed during operation.
The smooth functioning and operational safety of the measuring instrument
can only be guaranteed under the environmental conditions that are specified
in section 1.4 T
ECHNICAL DATA.
If the instrument was transported from a cold environment to a warm environment, the formation of condensate can lead to the faulty functioning of the instrument. In this event, wait until the temperature of the instrument reaches
room temperature before putting the instrument back into operation.
Safe operation If safe operation is no longer possible, the instrument must be taken out of
service and secured against inadvertent operation!
Safe operation is no longer possible if the measuring instrument:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of time
z is visibly damaged
Obligations of the
purchaser
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
The purchaser of the measuring instrument must ensure that the following
laws and guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
14
ba75369e04 01/2011
handylab Ox 12 Commissioning
3 Commissioning
3.1 Scope of delivery
z Handheld meter, handylab OX 12
z Operating manual and short operating manual
z 4 batteries, 1.5 V Mignon type AA (in the instrument)
3.2 Initial commissioning
Perform the following activities:
z Set the date and time
z Connect the plug-in power supply.
Setting the date
and time
1 Press the <M> key and hold it down.
2 Press the <ON/OFF> key.
The display test appears briefly on the display.
3 Press the <RUN/ENTER> key repeatedly until the date ap-
pears on the display.
4 Set the date of the current day with <▲> <▼>.
5 Confirm with <RUN/ENTER>.
The date (month) flashes in the display.
6 Set the current month with <▲> <▼>.
7 Confirm with <RUN/ENTER>.
The year appears on the display.
8 Set the current year with <▲> <▼>.
9 Confirm with <RUN/ENTER>.
The hours flash on the display.
10 Set the current time with <▲> <▼>.
11 Confirm with <RUN/ENTER>.
The minutes flash on the display.
ba75369e04 01/2011
12 Set the current time with <▲> <▼>.
13 Confirm with <RUN/ENTER>.
The instrument switches to the measuring mode.
15
Commissioning handylab Ox 12
1
2
3
Connecting the
plug-in power sup-
ply
You can either operate the measuring instrument with batteries or with the
plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 V DC). This saves the batteries.
Caution
The line voltage at the operating site must lie within the input voltage range
of the original plug-in power supply (see
section 1.4 T
ECHNICAL DATA).
Caution
Use original plug-in power supplies only (see
section 1.4 T
ECHNICAL DATA).
1 Plug the jack (1) into the socket (2) of the measuring instru-
ment.
2 Connect the original SI Analytics plug-in power supply (3) to an
easily accessible mains socket.
Note
You can also measure without the plug-in power supply. The functions of a
connected stirrer, however, can only be used when the plug-in power supply
is connected.
16
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handylab Ox 12 Operation
4 Operation
4.1 Switching on the measuring instrument
1 Connect the D. O. probe to the measuring instrument.
2 Press the <ON/OFF> key.
The display test appears briefly on the display.
The relative slope for the probe type that was just connected subsequently appears for approx. one second.
The measuring instrument then automatically switches to the measuring mode that was last selected. The display shows the relevant
measured value.
Note
The measuring instrument has an energy saving feature to avoid unnecessary battery depletion. The energy saving feature switches the measuring instrument off if no key has been pressed for an hour. The energy saving
feature is not active when the AutoStore function is active.
The energy saving feature is also not active
z if the power is supplied by the plug-in power supply,
z if the communication cable and a PC with a running communication pro-
gram are connected,
z if the recorder cable is connected,
z if the printer cable is connected (for external printers).
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17
Operation handylab Ox 12
4.2 Measuring
4.2.1 General information
You can measure the following variables:
z D. O. concentration
z D. O. saturation
z D. O. partial pressure
The measuring instrument is supplied with the following functions:
z AutoRange (automatic measurement range selection),
z The AutoRead function (drift control) for checking the stability of the mea-
surement signal. This ensures the reproducibility of the measuring signal.
For details of how to switch the AutoRead function on/off, see section
4.2.6.
Preparatory
activities
Temperature
sensor
Perform the following preparatory activities when you want to measure:
1 Connect the D. O. probe to the measuring instrument.
2 In conjunction with the D. O. probe, check or calibrate the measuring
instument. How to calibrate is described in section 4.3.
3 Select the measuring mode with <M>.
Note
Incorrect calibration of D. O. probes will result in incorrect measured values.
Calibrate at regular intervals.
The D. O. probe has an integrated temperature sensor that always measures
the current temperature of the test sample.
Caution
When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result. The RS232 interface is not galvanically isolated.
18
ba75369e04 01/2011
handylab Ox 12 Operation
ARng
%
LoBat
Cal
AR
8
°
F
Sal
mbar
S
1
RCL
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
7
1
9
2
7
O
°
C
mg/l
TP
cm
cm
M
%
LoBat
Cal
AR
8
°
F
mbar
S
1
RCL
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
7
1
4
2
5
O
°
C
mg/l
ARng
TP
Sal
4.2.2 Measuring the D. O. concentration
Note
When measuring the concentration of test samples with a salt content of
more than 1 g/l, a salinity correction is required. For this, you have to measure
and input the salinity of the measured medium first. This is described in section 4.3.3 E
Before measuring the oxygen, you have to switch on the salt content correction (see below).
You can measure the oxygen content without a salt content correction as follows:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the D. O. probe in the test sample.
3 Press the <M> key repeatedly until the D. O. concentration in mg/l
NTERING THE SALT CONTENT (SALINITY).
appears on the display.
Switching on/off
the salt content
correction
ba75369e04 01/2011
Proceed as follows to switch on the salt content correction:
1 In the D. O. concentration measuring mode, switch on the salt con-
tent correction with <▲>. The SAL display indicator appears on the
display. The value that was entered is taken into consideration during
the measurement (see section 4.3.3).
19
Operation handylab Ox 12
mg/l
LoBat
Cal
AR
8
°
F
Sal
mbar
S
1
RCL
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
7
1
9
2
8
O
°
C
ARng
TP
%
2 Switch the salt content correction off with <▼ >. The SAL display in-
dicator is no longer displayed.
4.2.3 Measuring the D. O. saturation
You can measure the D. O. saturation as follows:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the D. O. probe in the test sample.
3 Press the <M> key repeatedly until the saturation in % appears on
the display.
20
4.2.4 Measuring the D. O. partial pressure
You can measure the D. O. partial pressure as follows:
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the D. O. probe in the test sample.
3 Press the <M> key repeatedly until the partial pressure in mbar ap-
pears on the display.
ba75369e04 01/2011
handylab Ox 12 Operation
%
LoBat
Cal
AR
8
°
F
Sal
mbar
S
1
RCL
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
7
1
9
2
7
O
°
C
mg/l
ARng
TP
7
RCL
%
LoBat
Cal
8
°
F
Sal
mbar
S
1
Auto
Store
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
6
7
1
7
0
O
°
C
mg/l
TP
ARng
AR
4.2.5 Selecting the measuring range, AutoRange
AutoRange Each of the measuring parameters has 2 measuring ranges available. Au-
toRange causes the measuring instrument to change to measuring range II
if measuring range I is exceeded, and also vice versa.
To switch the automatic measurement range selection on/off, see section
4.6 C
ONFIGURATION. When the AutoRange function is switched on, ARng ap-
pears on the display.
4.2.6 AutoRead AR (drift control)
The AutoRead function (drift control) checks the stability of the measurement
signal. The stability has a considerable effect on the reproducibility of the
measured value.
1 Select the measuring mode with <M>.
2 Activate the AutoRead function with <AR>. The current measured
value is frozen (hold function).
3 Start AutoRead with <RUN/ENTER>.
The AR display indicator flashes until a stable measured value is
reached.
ba75369e04 01/2011
4 If necessary, start the next AutoRead measurement with <RUN/EN-
TER>.
21
Operation handylab Ox 12
5 To terminate the AutoRead function: Press the <AR> key.
Criteria With identical measurement conditions, the following applies:
Parameter Reproducibility Response time
D. O. concentration better than 0.05 mg/l > 10 seconds
D. O. saturation index better than 0.6 % > 10 seconds
D. O. partial pressure better than 0.6 mbar > 10 seconds
22
ba75369e04 01/2011
handylab Ox 12 Operation
8
LoBat
Time
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
1
S
RCL
AR
Store
Auto
Cal
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
6
7
1
9
2
7
O
°
C
mg/l
ARng
TP
4.3 Calibrating
Why calibrate? D. O. probes age. This changes the slope of the D. O. probe. Calibration de-
termines the current slope of the probe and stores this value in the instrument.
Thus, you should calibrate at regular intervals.
Calibration
procedures
When to calibrate? z After connecting another D. O. probe
The handylab OX 12 provides 2 calibration procedures:
z Calibration in water vapor-saturated air.
Use an air calibration vessel for calibration.
z Calibration via a comparison measurement (e. g. Winkler titration accord-
ing to DIN EN 25813 or ISO 5813). At the same time, the relative slope is
adapted to the comparison measurement by a correction factor.
z If the sensor symbol flashes, i. e. after the calibration interval has expired
Setting the
calibration interval
Printing the
calibration
record
ba75369e04 01/2011
The calibration interval (Int 3) is set to 14 days in the factory. You can select
the interval in the range of 1 ... 999 days.
The calibration protocol contains the calibration data of the current calibration.
You can transmit the calibration protocol to a printer via the serial interface
(see page 37).
Note
You can automatically print a calibration protocol after the calibration. To do
so, connect a printer to the interface according to section 4.5.3 before calibrating. After a valid calibration, the record is printed.
23
Operation handylab Ox 12
CALIBRATION PROTOCOL
02.03.99 14:19
Device No.: 12345678
CALIBRATION 02
Cal time: 02.03.99 / 14:19
Cal interval: 14d
OxiCal Tauto AR
Relative Slope: 0,88
Probe: +++
Sample printout:
Sensor evaluation After the calibration, the measuring instrument evaluates the current status
of the sensor against the relative slope. The evaluation appears on the display. The relative slope has no effect on the measuring accuracy. Low values
indicate that the electrolytic filling will soon be depleted and the probe has to
be regenerated.
Display Relative slope
E3
Eliminate the error according to
chapter 6 W
HAT TO DO IF...
S = 0.8 ... 1.25
S = 0.7 ... 0.8
S = 0.6 ... 0.7
S < 0.6 or S > 1.25
24
ba75369e04 01/2011
handylab Ox 12 Operation
ARng
mg/l
8
LoBat
Time
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
1
S
RCL
AR
Store
Auto
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
6
7
1
A
L
C
O
°
C
TP
Cal
ARng
mg/l
8
LoBat
Time
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
1
RCL
Store
Auto
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
6
7
1
8
8
0
O
°
C
TP
Cal
AR
S
4.3.1 Calibrating with the air calibration vessel
Proceed as follows to calibrate the instrument:
1 Connect the D. O. probe to the measuring instrument.
2 Keep an air calibration vessel ready for use.
Note
The sponge in the air calibration vessel must be moist (not wet).
3 Put the D. O. probe into the air calibration vessel.
4 Press the <CAL> key repeatedly until O
5 Press the <RUN/ENTER> key. AutoRead is active, AR flashes.
CAL appears.
2
ba75369e04 01/2011
6 As soon as a stable value is reached, the AR display indicator stops
flashing. This indicates that the calibration is complete; the sensor
symbol shows the relative slope that was determined and the sensor
evaluation (see page 24).
25
Operation handylab Ox 12
ARng
mg/l
8
LoBat
Time
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
1
RCL
Store
Auto
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
6
7
1
8
8
0
O
°
C
TP
Cal
AR
S
7 Switch to the measuring mode with <M>.
Note
In chapter 6 W
ination.
HAT TO DO IF... , you will find the measures to take for error elim-
26
ba75369e04 01/2011
handylab Ox 12 Operation
4.3.2 Calibrating via a comparison measurement
Proceed as follows to calibrate the instrument:
1 Connect the D. O. probe to the measuring instrument.
2 Press the <CAL> key repeatedly until O
FAC appears.
2
3 Immerse the D. O. probe in the calibrating solution.
4 Press the <RUN/ENTER> key.
The AutoRead measurement begins. If the measured value is stable,
the instrument displays the determined measured value and the correction factor of the relative slope (initial value = 1.000).
ba75369e04 01/2011
5 Remove the D. O. probe from the calibrating solution.
6 Perform a comparison measurement (determine the nominal value).
Leave the measuring instrument switched on until the nominal value
is determined.
7 Set the displayed value on the measuring instrument to the nominal
value with <▲> <▼>. This changes the related correction factor of
the relative slope.
27
Operation handylab Ox 12
8 Switch to the measuring mode with <M> or <RUN/ENTER>.
Note
If the correction factor deviates from 1.000, the display of the measured value
unit flashes.
28
ba75369e04 01/2011
handylab Ox 12 Operation
4.3.3 Entering the salt content (salinity)
A salt content correction is required in the oxygen concentration measurement of test samples with a salt content of more than 1 g/l. For this, you have
to enter the salinity equivalent (the measured salinity) of the test sample
(range 0.0 - 70.0) and to switch on the salinity correction.
Parameter Value range
Salinity 0.0 ... 70.0 in steps of 0.1
Entering the
salt content
1 Determining the salinity of the test sample (any method).
2 Press the <CAL> key repeatedly until Sal appears on the display.
3 Enter the salt content with <▲> <▼>.
4 Switch to the measuring mode with <M>.
Note
How to switch on the salt content correction is described on page 19.
ba75369e04 01/2011
29
Operation handylab Ox 12
TP
°
C
7
1
m
Sal
mg/l
8
LoBat
Time
Baud
Day.Month
Ident
Year
Sal
mbar
1
S
RCL
AR
Auto
Cal
°
F
1/
cm
/
K
%
TDS
UpH
mV/pH
S/
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
4
3
7
8
O
ARng
%
No.
Store
4.4 Saving
The measuring instrument has an internal data memory. It can store up to
800 data records.
A complete data record consists of:
z Storage location
z Date/time
z Measured value
z Temperature
z Temperature measuring procedure
z ID number
You can transmit measured values (data records) to the data storage in two
ways:
z Save manually
z Switch on AutoStore (Int 1).
4.4.1 Saving manually
You can transmit a measured value to the data storage as follows:
1 Press the <STO> key.
The current number (location number No.) of the next free storage location appears under the current measured value on the display.
2 Confirm with <RUN/ENTER>.
The display switches to entering the ID number.
30
ba75369e04 01/2011
handylab Ox 12 Operation
No.
TP
°
C
m
Sal
mg/l
8
LoBat
Time
Baud
Day.Month
Year
Sal
mbar
1
S
RCL
AR
Auto
Cal
°
F
1/
cm
/
K
%
TDS
UpH
mV/pH
S/
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
4
3
7
8
O
ARng
%
Store
7
1
Ident
3 Using <▲> <▼>, enter the required ID number (1 ... 999).
4 Confirm with <RUN/ENTER>.
The instrument changes to the measuring mode.
Message StoFull This message appears when all of the 800 storage locations are occupied.
You have the following options:
Saving the current measured value.
The oldest measured value (storage
location 1) will be overwritten by this
Returning to the measuring mode without
saving
Outputting the data storage see
Clearing the memory see
Press
<RUN/ENTER>.
press any key
section 4.4.3
section 4.4.4
ba75369e04 01/2011
31
Operation handylab Ox 12
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
S
8
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
F
F
O
t
1
n
1
Store
Auto
4.4.2 Saving automatically
The save interval (Int 1) determines the chronological interval between automatic save processes.
After the fixed interval has expired, the current data record is transmitted to
the storage and to the interface.
Setting the save
interval
The default setting for the save interval (Int 1) is OFF.
By this, the AutoStore function is switched off.
To switch the function on, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min,
15 min, 30 min, 60 min):
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <STO> key. Int 1 appears on the display.
3 Set the required interval between the saving procedures with <▲>
<▼>.
32
4 Confirm with <RUN/ENTER>.
The number of free memory locations appears on the display.
5 As soon as all of the 800 storage locations are occupied,
AutoStore is terminated (Int 1 = OFF).
If there are not enough storage locations available for your measurements:
– Output and backup the data storage (see page 34) and
– clear the memory (see page 38).
ba75369e04 01/2011
handylab Ox 12 Operation
e
r
F
9
9
9
S
1
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
1
Store
Auto
Ident
6 Confirm with <RUN/ENTER>.
The prompt for the ID number appears on the display.
7 Set the required ID number with <▲> <▼>.
8 Confirm with <RUN/ENTER>.
The instrument switches to the Oxi measuring mode and starts the
measuring and saving process.
AutoStore flashes on the display.
Switching off
AutoStore
Note
The AutoStore function is interrupted if you start other functions, e.g. output
the data storage.
After the function is finished, the AutoStore function is continued. By this,
however, temporal gaps in the recording of the measured values will occur.
Switch AutoStore off by:
z setting the save interval (Int 1) to OFF, or
z switching the measuring instrument off and then on again.
ba75369e04 01/2011
33
Operation handylab Ox 12
Store
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
p
S
T
O
d
I
s
RCL
No.
Store
Auto
%
/
K
Sal
1/
cm
°
F
8
%
mV/pH
m
S/
cm
cm
M
Sal
LoBat
Time
Baud
Day.Month
Ident
Year
mbar
1
S
AR
Cal
TDS
UpH
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
0
3
6
O
ARng
mg/l
RCL
TP
°
C
5
2
0
4.4.3 Outputting the data storage
You can output the contents of the data storage:
z Stored data on the display
z Calibration data on the display
z Stored data on the serial interface
z Calibration protocol to the interface
Outputting stored
data on the display
1 Press the <RCL> key repeatedly until StO dISP appears on the dis-
play.
2 Press the <RUN/ENTER> key.
A measured value appears on the display.
The storage location of the data record is displayed for approx. 2 s,
then the respective temperature appears.
34
You can perform the following activities:
Display further elements of the data record
(ID number, date, time, storage location)
Advance one data record (storage location) Press <▲>
Go back one data record (storage location) Press <▼>
Press
<RUN/ENTER>
ba75369e04 01/2011
handylab Ox 12 Operation
Store
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
R
S
t
o
S
E
RCL
Note
If you want to search for a certain element (e.g. date), proceed as follows:
1 Using <RUN/ENTER>, select the element (e.g. date).
2Press <▲> or <▼> repeatedly until the required date appears on the
display.
After approx. 2 s the temperature of the displayed measured value
appears.
Outputting stored
data to the
interface
1 Press the <RCL> key repeatedly until Sto SEr appears on the dis-
play.
2 Press the <RUN/ENTER> key.
The complete storage content is transmitted to the interface; during
the data transmission the numbers of the currently transmitted storage locations run through. After the data transmission, the measuring
instrument automatically switches to the measuring mode.
Note
You can cancel the transmission with <M> or <RUN/ENTER>.
ba75369e04 01/2011
After the instrument number, the printout contains the complete storage contents in ascending order of the storage location numbers.
35
Operation handylab Ox 12
Device No.: 99990000
No. 1:
09.03.99 17:10
101.7 % 17.6° C
Tauto AR
Ident : 10
No. 2:
09.03.99 17:11
7.11 mbar 17.6° C
Tauto AR
Ident : 10
No. 3:
09.03.99 17:12
7.88 mg/l 17.6° C
Tauto
Ident : 10
No. 4:
09.03.99 17:15
7.11 mg/l 17.8° C
Tauto
SAL = 17.9
Ident : 7
...
ARng
ConCal
Store
Auto
0
No.
LoBat
Day.Month
Year
Ident
UpH
AR
%
°F
°C
TP
mV/pH
mol/L
TempError
AutoCal DIN
CalError
AutoCal TEC
Time
Baud
1
S
mg/L
% ppm
ISE
LC
A
pi
s
RCL
d
Sample printout:
Outputting the
calibration data
on the display
1 Press the <RCL> key repeatedly until CAL dISP appears on the dis-
play.
2 Press the <RUN/ENTER> key.
The relative slope on the display
36
ba75369e04 01/2011
handylab Ox 12 Operation
d
ARng
ConCal
Store
Auto
0
No.
LoBat
Day.Month
Year
Ident
UpH
AR
%
°F
°C
TP
mV/pH
mol/L
TempError
AutoCal DIN
CalError
AutoCal TEC
Time
Baud
1
S
mg/L
% ppm
ISE
LC
A
rs
e
RCL
3 Using <M> or <RUN/ENTER>, you can switch back to the measuring
mode.
Outputting the
calibration
protocol on the
interface
1 Press the <RCL> key repeatedly until CAL appears on the display.
2 Press the <RUN/ENTER> key.
The calibration protocol is transmitted to the interface.
After the data transmission, the measuring instrument automatically
switches to the measuring mode.
Note
You will find a sample calibration protocol in P
CORD, page 23.
RINTING THE CALIBRATION RE-
ba75369e04 01/2011
37
Operation handylab Ox 12
RCL
d
Auto
Ident
S
1
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Year
r
S
t
o
c
l
Store
4.4.4 Clearing the memory
With this function, you can delete stored data records. 800 storage locations
will then be available again.
Note
The Clear memory function only appears when there are data records stored
in the memory. Otherwise, the measuring instrument automatically switches
to the measuring mode.
Proceed as follows to clear all data records:
1 Switch off the measuring instrument.
2 Press the <STO> key and hold it down.
3 Press the <ON/OFF> key.
The display test appears briefly on the display.
Subsequently, Sto clr appears.
38
4 Confirm the clearing process with <RUN/ENTER>.
Pressing any other key prevents the clearing, the data records will remain stored.
Note
The calibration data remain stored and can be called up.
ba75369e04 01/2011
handylab Ox 12 Operation
4.5 Transmitting data
You have the following possibilities of transmitting data:
z One of the following options:
– With the AutoStore function (page 32), measured values are
periodically saved internally (save interval Int 1) and output on the
interface.
– With the Data transmission interval function (Int 2), measured values
are periodically output on the interface (see below).
z With the Output data storage function (page 34), calibration data or saved
measured values are output on the interface.
z Via the analog recorder output (page 40), measured values are output as
voltage values.
z With a communication kit (accessory), data can be transmitted bidirection-
ally (page 41).
Note
If you connect a recorder (analog output), the output on the digital interface
is switched off.
Setting the
Data transmission
interval
4.5.1 Data transmission interval (Int 2)
The interval to the data transmission (Int 2) determines the chronological interval between automatic data transmissions. After the selected interval expires, the current data record is transmitted to the interface.
Note
When the AutoStore function is active, the data transmission is performed ac-
cording to the setting of the save interval (Int 1). Set the save interval (Int 1)
to OFF to activate the Data transmission interval (Int 2).
The default setting for the interval is OFF.
To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min,
5 min, 10 min, 15 min, 30 min, 60 min):
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <RCL> key. Int 2 appears on the display.
ba75369e04 01/2011
39
Operation handylab Ox 12
Store
Auto
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
M
m
%
mg/l
cm
S/
cm
S
8
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
mbar
OUpH
mV/pH
AutoCal DIN
AutoCal TEC
Time
Baud
Day.Month No.
Ident
Year
F
F
O
t
2
n
1
1 free
2 Plug coding
3 Ground
4 Analog output
4
(internal resistance < 5 Ohm)
3 Set the required interval between the saving procedures with <▲>
<▼>.
4 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring
mode.
4.5.2 Recorder (analog output)
Socket
assignment
You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the Z 394 interface cable.
The data output automatically switches to Recorder output.
2
1
3
RS 232
REC
Note
The analog output is activated automatically in the cable by connecting 2 and
3.
The signal range of the analog output depends on the measured variable and
the measuring range (see section 1.4 T
ECHNICAL DATA).
40
ba75369e04 01/2011
handylab Ox 12 Operation
1 CTS
2 RxD
3 Ground
4TxD
4
4.5.3 PC/external printer (RS232 interface)
Via the RS 232 interface, you can transmit the data to a PC or an external
printer.
Use the Z 395 (PC) or Z 391 (ext. printer) cable to connect the interface to
the instruments.
The data output automatically switches to the RS232 interface.
Caution
The RS232 interface is not galvanically isolated.
When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.
Set up the following transmission data on the PC/printer:
Baud rate selectable between: 1200, 2400, 4800, 9600
Handshake RTS/CTS + Xon/Xoff
Parity none
Socket
assignment
Data bits 8
Stop bits 1
2
1
3
RS 232
REC
4.5.4 Remote control
The handheld meter can be remotely controlled from a PC. This requires a
communication kit (communication cable + communication program) which is
available upon request. The instrument is then controlled via commands that
simulate keystrokes and request the current display contents.
Note
A more detailed description is provided within the scope of delivery of the
communication kit.
ba75369e04 01/2011
41
Operation handylab Ox 12
Day.Month No.
Time
1
2
M
m
%
mg/l
cm
S/
cm
S
mbar
mV/pH
t
n
Store
Auto
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
OUpH
AutoCal DIN
AutoCal TEC
Ident
Year
0
0
8
4
Baud
4.6 Configuration
You can adapt the measuring instrument to your individual requirements. To
do this, the following parameters can be changed (the status on delivery is
marked in bold):
Baud rate 1200, 2400, 4800, 9600
Air pressure display Current value in mbar
(no input possible)
AutoRange ARng On or off
Calibration interval (Int 3) 1 ... 14 ... 999 d
Date/time Any
Note
You can leave the configuration menu at any time with <M> . The parameters
that have already been changed are stored.
Baud rate
1 Switch off the measuring instrument.
2 Press the <M> key and hold it down.
3 Press the <ON/OFF> key.
The display test appears briefly on the display. The measuring instrument then switches automatically to the setting of the baud rate.
4 Select the required Baud rate with <▲> <▼>.
5 Confirm with <RUN/ENTER>. The current air pressure in mbar ap-
pears on the display.
42
ba75369e04 01/2011
handylab Ox 12 Operation
Baud
4
Day.Month No.
Time
1
M
m
%
mg/l
cm
S/
cm
S
mV/pH
t
n
Store
Auto
LoBat
Tref25
nLF
/
K
%
RCL
Sal
°
AR
TP
C
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
OUpH
AutoCal DIN
AutoCal TEC
Ident
Year
9
4
9
mbar
P
°
C
1
TP
ARng
mg/l
LoBat
Baud
Day.Month No.
Ident
Year
Sal
%
mbar
S
RCL
AR
Store
Auto
°
F
1/
cm
/
K
%
TDS
UpH Sal
mV/pH
S/
m
cm
cm
M
Lin
Tref25
Tref20
nLF
AutoCal DIN
AutoCal TEC
4
1
t
3
n
O
1
d
Time
Cal
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
Sal
TDS
UpH
AutoCal DIN
AutoCal TEC
Ident
Year
S
E
Y
ARng
n
r
A
O
Displaying the air
pressure
6 Confirm with <RUN/ENTER>. Int 3 appears on the display.
Calibration interval
7 Set the required interval in days with <▲> <▼>.
8 Confirm with <RUN/ENTER>.
Arn appears on the display.
9 Using <▲> <▼>, switch between no and YES.
YES: Switch on AutoRange.
no: Switch off AutoRange.
10 Confirm with <RUN/ENTER>.
The date flashes on the display.
ba75369e04 01/2011
43
Operation handylab Ox 12
S
1
M
m
%
mg/l
cm
S/
cm
mbar
mV/pH
D
i
s
Store
Auto
Ident
LoBat
Tref25
nLF
/
K
%
Sal
°
AR
TP
C
cm
1/
°
F
ARng
Cal
Lin
Tref20
Sal
TDS
OUpH
AutoCal DIN
AutoCal TEC
Time
Baud
No.
Year
4
0
9
0
Day.Month
Date and time
11 Set the date of the current day with <▲> <▼>.
12 Confirm with <RUN/ENTER>.
The date (month) flashes in the display.
13 Set the current month with <▲> <▼>.
14 Confirm with <RUN/ENTER>.
The year appears on the display.
15 Set the current year with <▲> <▼>.
16 Confirm with <RUN/ENTER>.
The hours flash on the display.
17 Set the current time with <▲> <▼>.
18 Confirm with <RUN/ENTER>.
The minutes flash on the display.
19 Set the current time with <▲> <▼>.
20 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring
mode.
44
ba75369e04 01/2011
handylab Ox 12 Operation
4.7 Reset
You can reset (initialize) the measurement parameters and the configuration
parameters separately from one another.
Measurement
parameters
Configuration
parameters
The following measured parameters (O
InI) are reset to the default condi-
2
tion:
Measuring mode D. O. concentration
AutoRange automatic measure-
On (YES)
ment range selection
Relative slope 1.00
Correction factor of the relative
1.000
slope
Salinity equivalent 0.0
Salt content correction off
Note
The calibration data gets lost when the measuring parameters are reset.
Recalibrate after performing a reset.
The following configuration parameters (InI) are reset to the delivery status:
Baud rate 4800
Interval 1
(automatic save) OFF
Interval 2
(for data transmission) OFF
ba75369e04 01/2011
45
Operation handylab Ox 12
UpH
ARng
Y
Sal
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
TDS
AutoCal DIN
AutoCal TEC
Ident
Year
o
n
I
n
I
O
OUpH
ARng
Y
Sal
Sal
/
K
%
TP
C
°
°
F
Store
cm
1/
1
S
M
m
%
mg/l
cm
S/
cm
mV/pH
mbar
Baud
4
Day.Month No.
Time
Auto
LoBat
Tref25
nLF
RCL
AR
Cal
Lin
Tref20
TDS
AutoCal DIN
AutoCal TEC
Ident
Year
o
n
I
n
I
Resetting the
measuring
paramters
1 Press the <RUN/ENTER> key and hold it down.
2 Press the <CAL> key.
3 Using <▲> <▼>, switch between no and YES.
YES: Resetting the measuring parameters
no: Retaining settings.
4 Confirm with <RUN/ENTER>.
The measuring instrument switches to the configuration parameters.
Resetting the
configuration
parameters
5 Using <▲> <▼>, switch between no and YES.
YES: Resetting the configuration parameters
no: Retaining settings.
6 Confirm with <RUN/ENTER>.
The measuring instrument automatically switches to the measuring
mode.
46
ba75369e04 01/2011
handylab Ox 12 Maintenance, cleaning, disposal
1
2
5 Maintenance, cleaning, disposal
5.1 Maintenance
The measuring instrument is almost maintenance-free.
The only maintenance task is replacing the batteries.
LoBat indicates that the batteries should be changed. The batteries are then
largely depleted.
Replacing the
batteries
1 Open the housing after the instrument has been switched off:
– Undo the four screws on the underside of the instrument
– Pull down the lower cover (1).
ba75369e04 01/2011
2 If necessary, take the four depleted batteries (2) out of the bat-
tery compartment.
3 Place four new batteries (type Mignon AA) in the battery com-
partment.
4 Close the lower cover (1).
Caution
Make sure that the poles of the batteries are the right way round.
The
± signs on the batteries must correspond to the ± signs in the battery
compartment.
Only use leakproof alkaline manganese batteries.
47
Maintenance, cleaning, disposal handylab Ox 12
Note
For the maintenance of the sensors, follow the corresponding operating manual.
5.2 Cleaning
Occasionally wipe the outside of the measuring instrument with a damp, lintfree cloth. Disinfect the housing with isopropanol as required.
Caution
The housing is made of a synthetic material (ABS). Thus, avoid contact with
acetone and similar detergents that contain solvents. Remove any splashes
immediately.
5.3 Disposal
Packing This measuring instrument is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing protects the
instrument against damage during transport.
Batteries This note refers to the battery regulation that applies in the Federal Republic
of Germany. We would ask end-consumers in other countries to follow their
local statutory provisions.
Note
This instrument contains batteries. Batteries that have been removed must
only be disposed of at the recycling facility set up for this purpose or via the
retail outlet.
It is illegal to dispose of them in household refuse.
Measuring
instrument
Dispose of the measuring instrument as electronic waste at an appropriate
collection point. It is illegal to dispose of the instrument in household refuse.
48
ba75369e04 01/2011
handylab Ox 12 What to do if...
6 What to do if...
LoBat display
Instrument does
not react to key-
stroke
Cause Remedy
– Batteries almost empty – Replace batteries
(see section 5.1 M
Cause Remedy
– Operating condition
undefined or EMC load
unallowed
– Processor reset:
Press the <CAL> and
<ON/OFF> keys at the same
time and release them again.
The software version is
displayed.
AINTENANCE)
Error message 0FL
Error message E3
Cause Remedy
Display range exceeded
D. O. probe:
– Not connected – Connect the probe
– Cable broken – Replace probe
– Depleted – Replace probe
– Short-circuit between gold
and lead electrode
– Clean probe and replace it if
necessary
Cause Remedy
Invalid calibration
D. O. probe:
– Electrolyte solution depleted – Regenerate probe
– Membrane contaminated – Clean membrane
ba75369e04 01/2011
– Electrode system poisoned – Regenerate probe
– Worn out – Replace probe
– broken – Replace probe
49
What to do if... handylab Ox 12
Error message E7
AR flashes
continuously
Measured value
too low
Cause Remedy
Membrane damaged
– Membrane damaged – Regenerate probe
– Membrane head not screwed
– Screw membrane head tight
on tight enough
Cause Remedy
No stable measured value
– Membrane contaminated – Clean membrane
Cause Remedy
– Insufficient
– Provide flow to the probe
flow
Measured value
too high
Display
to
Probe symbol
flashes
Cause Remedy
– High amount of dissolved
substances
– Air bubbles bump on the
membrane with high velocity
– The carbon dioxide pressure
– Correct solubility function using
the salinity equivalent
– Avoid direct flow to the
membrane
– Measuring not possible
is too high (> 1 bar)
Cause Remedy
– Time-out of the interface – Check the instrument that is
connected
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system
50
ba75369e04 01/2011
handylab Ox 12 What to do if...
Message StoFull
Cause Remedy
– All memory locations are full – Output data storage and clear
data storage
ba75369e04 01/2011
51
What to do if... handylab Ox 12
52
ba75369e04 01/2011
handylab Ox 12 Lists
7Lists
This chapter provides additional information and orientation aids.
Abbreviations The list of abbreviations explains the indicators and the abbreviations that ap-
pear on the display and in the manual.
Specialist terms The glossary briefly explains the meaning of the specialist terms. However,
terms that should already be familiar to the target group are not described
here.
Index The index will help you to find the topics that you are looking for.
ba75369e04 01/2011
53
Lists handylab Ox 12
Abbreviations
AR AutoRead (drift control)
ARng Automatic range switching
Measuring instrument measures with highest resolution
°C Temperature unit, degrees Celsius
Cal Calibration
D. O. Dissolved Oxygen
InI Initialization
Resets individual basic functions to the status they
had on delivery
LoBat Batteries almost empty (Low Battery)
OFL Display range exceeded (Overflow)
SAL Salinity
SELV Safety Extra Low Voltage
TP Temperature measurement active (Temperature
Probe)
54
ba75369e04 01/2011
handylab Ox 12 Lists
Glossary
Adjusting To manipulate a measuring system so that the relevant value (e. g. the
displayed value) differs as little as possible from the correct value or
a value that is regarded as correct, or that the difference remains within the tolerance.
Amperometry Name of a measuring technique. The signal (depending on the mea-
sured parameter) of the probe is the electric current. The electrical
voltage remains constant.
AutoRange Name of the automatic selection of the measuring range.
AutoRead Name for a function to check the stability of the measured value.
Calibration Comparing the value from a measuring system (e. g. the displayed
value) to the correct value or a value that is regarded as correct. Often, this expression is also used when the measuring system is adjusted at the same time (see adjusting).
D. O. partial pressure Pressure caused by the oxygen in a gas mixture or liquid.
D. O. saturation Short name for the relative D. O. saturation.
Note: The D. O. saturation value of air-saturated water and the D. O.
saturation value of oxygen-saturated water are different.
Measured parameter The measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or D. O. concentration.
Measured value The measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and
unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Measuring system The measuring system comprises all the devices used for measuring,
e. g. measuring instrument and probe. In addition, there is the cable
and possibly an amplifier, terminal strip and armature.
Molality Molality is the quantity (in Mol) of a dissolved substance in 1000 g sol-
vent.
OxiCal
®
Name for a procedure to calibrate D. O. measuring systems in water
vapor saturated air.
Reset Restoring the original condition of all settings of a measuring system.
Resolution Smallest difference between two measured values that can be dis-
played by a measuring instrument.
Slope The slope of a linear calibration function.
Slope (relative) Designation used in the D. O. measuring technique. It expresses the
ba75369e04 01/2011
relationship of the slope value to the value of a theoretical reference
probe of the same type of construction.
55
Lists handylab Ox 12
Standard solution The standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
Test sample Designation of the sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not processed.
56
ba75369e04 01/2011
handylab OX 12 Index
Index
A
Analog output 40
Authorized use 13
AutoRange 21
AutoRead 21
Criteria 22
C
Calibration
start
25
Calibration protocol 23
Connecting a printer 41
Connecting the plug-in power
supply
16
D
Data record 30
Data transmission (interval)
39
Default condition 45
Display 7
Drift control 21
E
Electrode evaluation 24
Energy saving feature 17
Error messages 49
I
Initial commissioning 15
Initialization 45
Interval
data transmission
save 32
39
Measuring the D. O.
saturation
20
O
Operating safety 14
P
Printing
calibration protocol
23
R
Remote control 41
Replacing the batteries 47
Reset 45
RS232 interface 41
S
Safety 13
Safety precautions 13
Salt content correction
entering the salinity
switching on 19
Save interval 32
Scope of delivery 15
Selecting the measuring
range
21
Setting the baud rate 42
Setting the date 15, 44
Setting the time 15, 44
Slope 23
29
T
Temperature sensor 18
K
Keys 6
L
LoBat 49
M
Measuring the D. O.
concentration
19
57
Index handylab OX 12
58
SI Analytics GmbH
Postfach 2443
D-55014 Mainz
Hattenbergstr. 10
D-55122 Mainz
Telefon +49 (0) 61 31/66 5111
Telefax +49 (0) 61 31/66 5001
Email: support@
si-analytics.com
Internet: www.si-analytics.com
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