SCHOTT handylab multi 12 User manual

ba75371e01 11/2002
Operating manual
ba75371e
handylab multi 12
AR
M
O
6
7
1
92
7
O
°
C
mg/l
ARng
TP
RCL
STO
CAL
pH/Dissolved Oxygen/Conductivity
Measuring Instrument

Accuracy when
going to press 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. Al-
so, we cannot guarantee that there are absolutely no errors in this man-
ual. Therefore, we are sure you will understand that we cannot accept
any legal claims resulting from the data, figures or descriptions.
Warranty We guarantee the instrument described for 3 years from the date of
purchase.
The instrument warranty covers manufacturing faults that are discov-
ered within the warranty period. The warranty does not cover compo-
nents 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 han-
dling or unauthorized opening of the instrument invalidates any warran-
ty claim.
Copyright ©Mainz, Schott-Geräte GmbH, 2002
Reproduction in whole - or even in part - is prohibited without the ex-
press written permission of Schott-Geräte GmbH, Mainz.
Printed in Germany.

handylab multi 12 List of contents
3
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 General features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5 Operating structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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 pH value / ORP voltage . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . 18
4.2.2 Measuring the pH value . . . . . . . . . . . . . . . . . . 20
4.2.3 Measuring the ORP voltage . . . . . . . . . . . . . . . 21
4.2.4 pH calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.3 Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3.1 General information . . . . . . . . . . . . . . . . . . . . . . 28
4.3.2 Measuring the D. O. concentration . . . . . . . . . . 29
4.3.3 Measuring the D. O. saturation . . . . . . . . . . . . . 30
4.3.4 AutoRead AR (Drift control) . . . . . . . . . . . . . . . 31
4.3.5 D. O. calibration . . . . . . . . . . . . . . . . . . . . . . . . 32
4.3.6 Salt content correction . . . . . . . . . . . . . . . . . . . 35
4.4 Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.4.1 General information . . . . . . . . . . . . . . . . . . . . . . 36
4.4.2 Measuring the conductivity . . . . . . . . . . . . . . . . 38
4.4.3 Measuring the salinity . . . . . . . . . . . . . . . . . . . . 38
4.4.4 AutoRead AR (Drift control) . . . . . . . . . . . . . . . 39
4.4.5 Determining the cell constant (Calibration in the
control standard) . . . . . . . . . . . . . . . . . . . . . . . . 40
4.5 Calibration intervals (Int 3, Int 4, Int 5) . . . . . . . . . . . . . . 43
4.6 Saving data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.6.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . 44
4.6.2 Switching on AutoStore (Int 1) . . . . . . . . . . . . . 46
4.6.3 Outputting the data storage . . . . . . . . . . . . . . . . 48
4.6.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . 54
4.7 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4.7.1 Data transmission interval (Int 2) . . . . . . . . . . . 55

List of contents handylab multi 12
4
4.7.2 PC/external printer (RS232 interface) . . . . . . . . 57
4.7.3 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.8 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.9 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 65
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.1 pH system messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.2 Oxi system messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
6.3 Conductivity system messages . . . . . . . . . . . . . . . . . . . 70
6.4 General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

handylab multi 12 Overview
5
1Overview
1.1 General features
The compact precision handheld meter handylab multi 12 enables you
to carry out pH measurements, dissolved oxygen (D. O.) measure-
ments and conductivity measurements quickly and reliably.
The handylab multi 12 handheld meter provides the maximum degree
of operating comfort, reliability and measuring certainty for all applica-
tions.
The proven MultiCal®and OxiCal®calibration procedures and the pro-
cedures to determine/set up the cell constant support you in your work
with the meter. The special AutoRead function enables precise mea-
surements.
1Keypad
2Display
3Jack field
AR
M
O
6
7
1
92
7
O
°
C
mg/l
ARng
TP
RCL
STO
CAL
1
2
3

Overview handylab multi 12
6
1.2 Keypad
Key functions
M
CAL
STO
RUN/ENTER
AR
RCL
Select the measured variable <M>:
–pH value / ORP voltage
–D. O. concentration / D. O. saturation
–Conductivity / salinity
Save a measured value
<STO>
Switch measuring instrument on/off
<ON/OFF>
Calibrate the currently set measured variable
<CAL>
Display/transmit measured values
<RCL>
Activate/deactivate the AutoRead function
<AR>
Select the measuring mode, increase values,
scroll
<
 >
Select the measuring mode, decrease values,
scroll
<
 >
Confirm entries, start AutoRead,
output measured values
<RUN ENTER>
M
STO
CAL
RCL
AR
RUN/ENTER

handylab multi 12 Overview
7
1.3 Display
1.4 Jack field
1D. O. probe or conductivity measuring cell
2pH electrode
3pH temperature probe
4Plug-in power supply unit
5RS232 serial interface
ARng
Tref20
AutoCal DIN
Lin
TDS
cm
M
°
F
/
K
%
Time
Baud
Day.Month No.
Ident
Year
8
8.
8
88
8
°
C
%
mg/l
TP
1
mV/pH
UpH SalO
S
Tref25
nLF
AutoCal TEC
RCL
Auto
Store
LoBat
Cal
AR
1/
cm
Sal
mbar
S/
m
cm
Status display
Meas. value display
Function and
temperature display
Sensor symbol
5
123
4

Overview handylab multi 12
8
1.5 Operating structure
The following overview diagram shows which keys you have to press
to select between the different measuring modes:
Note
When a D. O. probe or a conductivity measuring cell with a temperature
probe is connected, the measuring instrument recognizes the probe or
measuring cell and automatically switches to the oxygen measuring
mode or conductivity measuring mode last selected. As soon as the
probe/measuring cell is disconnected, the instrument switches to the
pH or ORP measuring mode.

handylab multi 12 Overview
9
1.6 Technical data
Dimensions
and weight
Mechanical structure
Electrical safety
Test certificates
Ambient conditions
pH/ORP measuring
ranges
Precision of
pH/ORP (± 1 digit)
pH correction function
Oxi measuring ranges
Length [mm] 172
Width [mm] 80
Height [mm] 37
Weight [kg] approx. 0.3
Type of protection IP 66
Protective class III
GS, cETLus, CE
Storage - 25 °C ... + 65 °C
Operation -10 °C ... + 55 °C
Relative atmospheric humidity annual average < 90 %
Measuring range Resolution
pH - 2.00 ... + 19.99 0.01
U [mV] - 1999 ... + 1999 1
T [°C] - 5.0 ... + 105.0 0.1
pH (after calibration) ± 0.01
U [mV] ± 1
T [°C] ± 0.1
Temperature input
Manually [°C] - 20 ... + 130
mg/l %
Measuring range I
Resolution
0 ... 19.99
0.01
0 ... 199.9
0.1
Measuring range II
Resolution
0 ... 90.0l
0.1
0 ... 600
1

Overview handylab multi 12
10
Precision of
Oxi (± 1 digit)
Correction
functions of Oxi
Measuring ranges of
Conductivity
Precision of
Conductivity (± 1 digit)
Cell constant,
calibrating
Reference temperature
of Conductivity
Concentration ± 0.5 % of measured value
at ambient temperature of 5 °C ... 30 °C
Saturation ± 0.5 % of measured value
when measuring in the range of
± 10 K around the calibration temperature
Temperature
compensation
< 2 % at 0 ... 40 °C
T [°C] ± 0.1
Salinity correction 0 ... 70.0 SAL
Air pressure correction Automatic through built-in pressure sensor
in the range 500 ... 1100 mbar
Measuring range Resolution
[µS/cm] 0 ... 1999 1
[mS/cm] 0.00 ... 19.99
0.0 ... 199.9
0 ... 500
0.01
0.1
1
SAL 0.0 ... 70.0 accord-
ing to the IOT table
0.1
T [°C] −5.0 ... + 105.0 0.1
Nonlinear compensation :
Precision Temperature of material
under test
± 0.5 % 0 °C ... 35 °C
according to EN 27 888;
± 0.5 % 35 °C ... 50 °C
extended nLF function
SAL Range 0.0 ... 42.0
Accuracy Sample temperature
± 0.1 5 °C ... 25 °C
± 0.2 25 °C ... 30 °C
T [°C] ± 0.1
C [cm-1] 0.450 ... 0.500
Tref Can be set to 20 °C or 25 °C

handylab multi 12 Overview
11
Serial interface Automatic switchover if a PC or printer is connected.
Power supply
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
Batteries 4 x 1.5 V alkali-manganese batteries,
Type AA
Operational life approx. 3000 operating hours
Mains The following applies to all plug-in power
supplies:
Connection max. overvoltage category II
Plug-in power supply with Euro plug:
FRIWO FW1199, 11.7864
Friwo Part. No. 1762613
Input: 230 V ~ / 50 Hz / 5.6 VA
Output: 12 V = / 130 mA / 1.56 VA
Plug-in power supply with US plug:
FRIWO FW1199, 11.7880
Friwo Part. No. 1794043
Input: 120 V ~ / 60 Hz / 6 VA
Output: 12 V = / 150 mA
Plug-in power supply with UK plug:
FRIWO FW1199, 11.7872
Friwo Part No. 1816491
Input: 230V ~ / 50 Hz / 5.6 VA
Output: 12 V = / 130 mA / 1.56 VA

Overview handylab multi 12
12
Applicable
guidelines and norms
EMC EEC guideline 89/336/EWG
EN 61326-1:1997
EN 61000-3-2:1995 + pr A14:2000
EN 61000-3-3:1995
FCC Class A
Instrument safety EC guideline 73/23/EWG
EN 61010-1 A2:1995
Climatic class VDI/VDE 3540
Type of protection EN 60529:1991

handylab multi 12 Safety
13
2 Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the measur-
ing instrument. Consequently, all responsible personnel must read this
operating manual carefully 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 laboratory.
Thus, we assume that, as a result of their professional training and ex-
perience, the operators will know the necessary safety precautions to
take when handling chemicals.
Safety instructions The individual chapters of this operating manual use the following safe-
ty instruction 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 envi-
ronment.
Further notes
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating manu-
als.
2.1 Authorized use
The authorized use of the measuring instrument consists exclusively of
the:
lpH and ORP measurement
lmeasurement of the oxygen content and
lmeasurement of the conductivity, salinity and temperature
in the field and laboratory.
The technical specifications as given in section 1.6 TECHNICAL DATA
must be observed. Only the operation and running of the measuring in-
strument according to the instructions given in this operating manual is
authorized. Any other use is considered to be unauthorized.

Safety handylab multi 12
14
2.2 General safety instructions
This instrument is built and inspected according to the relevant guide-
lines and norms for electronic measuring instruments (see section
1.6 TECHNICAL DATA).
It left the factory in a safe and secure technical condition.
Function and operating
safety The smooth functioning and operational safety of the measuring instru- ment can only be guaranteed if the generally applicable safety mea-
sures and the specific safety instructions in this operating manual are
followed during operation.
The smooth functioning and operational safety of the measuring instru-
ment can only be guaranteed under the environmental conditions that
are in specified in section 1.6 TECHNICAL DATA.
If the instrument was transported from a cold environment to a warm
environment, the formation of condensate can lead to the faulty func-
tioning 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:
lhas been damaged in transport
lhas been stored under adverse conditions for a lengthy period of
time
lis visibly damaged
lno longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
Obligations of the pur-
chaser
The purchaser of the measuring instrument must ensure that the fol-
lowing laws and guidelines are observed when using dangerous sub-
stances:
lEEC directives for protective labor legislation
lNational protective labor legislation
lSafety regulations
lSafety datasheets of the chemical manufacturers.

handylab multi 12 Commissioning
15
3 Commissioning
3.1 Scope of delivery
lhandylab multi 12 handheld meter
lOperating manual and short operating manual
l4 batteries, 1.5 V Mignon type AA (in the instrument)
3.2 Initial commissioning
Perform the following activities:
lSet the date and time
lConnect the plug-in power supply (optional)
Setting the date and
time 1Press the <M> key and hold it down.
2 Press the <ON/OFF> key.
The display test appears briefly on the display.
3Press the <RUN/ENTER> key repeatedly until the date ap-
pears on the display.
4 Set the date of the current day with <
 > <  >.
5Confirm with <RUN/ENTER>.
The date (month) flashes in the display.
6 Set the current month with <
 > <  >.
7Confirm with <RUN/ENTER>.
The year appears on the display.
8 Set the current year with <
 > <  >.
9Confirm 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.
12 Set the current time with <
 > <  >.
13 Confirm with <RUN/ENTER>.
The instrument switches to a measuring mode.

Commissioning handylab multi 12
16
Connecting the
plug-in power supply You can either operate the measuring instrument with batteries or with the plug-in power supply. The plug-in power supply supplies the mea-
suring instrument with low voltage (12 VDC). 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 section 1.6 TECHNICAL
DATA).
Warning
Use original plug-in power supplies only (see
section 1.6 TECHNICAL DATA).
1Plug the jack (1) into the socket (2) of the measuring instru-
ment.
2 Connect the original SCHOTT plug-in power supply (3) to an
easily accessible mains socket.
2
1
3

handylab multi 12 Operation
17
4 Operation
4.1 Switching on the measuring instrument
Measuring mode when
switching on
Note
The measuring instrument has an energy saving feature to avoid un-
necessary 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
lif the power is supplied by the plug-in power supply,
lif the AutoStore function is active,
lif the communication cable and a PC with a running communication
program are connected,
lif the printer cable is connected (for external printers).
AutoRange measure-
ment range selection
There are several measuring ranges available for both oxygen and
conductivity measurements. As a rule, the measuring instrument is in
the measuring range with the highest possible resolution. If a measur-
ing range is exceeded, AutoRange causes the measuring instrument to
change automatically to the next higher measuring range.
The AutoRange function is always active with oxygen and conductivity
measurements and cannot be switched off.
Note
The measuring ranges for oxygen and conductivity measurements can
be found in section 1.6 TECHNICAL DATA.
1Press the <ON/OFF> key.
The display test appears briefly on the display.
After this, the measuring instrument automatically switches to
the measuring mode.
Connected sensor Measuring mode
No sensor or pH/ORP electrode pH or ORP measurement (de-
pending on the last selected set-
ting)
D. O. probe or conductivity mea-
suring cell
Last selected measuring mode
2 sensors of any type Last selected measuring mode

Operation handylab multi 12
18
4.2 pH value / ORP voltage
4.2.1 General information
Preparatory activities Perform the following preparatory activities when you want to measure:
Note
Incorrect calibration of pH electrodes leads to incorrect measured val-
ues. Calibrate regularly before measuring. You can only connect elec-
trodes of the NTC30 type or without temperature probe.
Warning
When connecting an earthed PC/printer, measurements cannot be per-
formed in earthed media as incorrect values would result. The RS232
interface is not galvanically isolated.
1Connect the pH electrode to the measuring instrument.
If necessary, press the <M> key repeatedly until the status dis-
play pH (pH measurement) or U(measurement of the ORP
voltage) appears.
2 Adjust the temperature of the buffer solutions or test solutions,
or measure the current temperature, if you measure without a
temperature probe.
3Calibrate or check the measuring instrument with the elec-
trode.
4Using<
 > <  >, toggle between the pH or mV measuring
modes.

handylab multi 12 Operation
19
Temperature measure-
ment in pH measure-
ments
You can perform pH measurements with or without a temperature
probe as well as with the temperature probe of an oxygen sensor or a
conductivity measuring cell. The measuring instrument recognizes
which sensors are connected and switches automatically to the correct
mode for the temperature measurement.
The following cases are distinguishable.
* If you do not wish that, you can:
–either disconnect the 2nd sensor and use the manual temperature
input or
–use an electrode with a temperature probe.
If a temperature probe is connected, it is indicated on the display by TP.
Note
When calibrating without a temperature probe (no TP display indicator
displayed), enter the current temperature of the respective buffer solu-
tion manually using the <
 > <  >keys while keeping the <RUN/EN-
TER> key depressed.
Temperature probe Display Mode
pH Cond or
Oxi
yes - TP Automatic with
pH temperature probe
yes yes TP
- - Manual
-yesTP
flashes
The temperature value of the
second probe (Cond or Oxi) in
the same sample is taken
over for the pH measurement*

Operation handylab multi 12
20
4.2.2 Measuring the pH value
AutoRead AR
(Drift control)
The AutoRead function (drift control) checks the stability of the mea-
surement signal. The stability has a considerable impact on the repro-
ducibility of the measured values.
For identical measurement conditions, the following criteria apply:
1Perform the preparatory activities according to section 4.2.1.
2 Immerse the pH electrode in the test sample.
3Press the <  > <  >keys until pH appears in the status display.
The pH value appears on the display.
4When measuring without a connected temperature probe:
Options:
lDetermine the current temperature using a thermometer
and, while keeping the <RUN/ENTER> key depressed, en-
ter this temperature value with <
 > <  >.
lTP display indicator not displayed, socket for the second
probe is free:
Connect the second probe (Oxi or Cond) and immerse it in
the same sample. TP flashes, the temperature is automati-
cally measured using the second probe.
Tref20
Lin Cal
8
1
S
SalOU
%
mg/l
mV/pH
1/
cm
Sal
AutoCal DIN
Tref25
nLF
AutoCal TEC
RCL
Auto
Store
LoBat
ARng AR
Time
Baud
Day.Month No.
Ident
Year
mbar
TDS
cm
M
°
F
/
K
%
S/
m
cm
8
4
2
99
6
°
C
TP
pH
Reproducibility Response time
Better than 0.02 > 30 seconds
1Call up the pH measuring mode with <  > <  >.
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).