SCHOTT handylab pH 11 User manual

ba75366d04 01/2011
Operating manual
handylab pH 11
pH Meter
AR
O
CAL
PH
6
4
2
992
6
°
C
TP
M

handylab LF 12
2ba75366d04 01/2011
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 ©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.

handylab pH 11 List of contents
3
handylab pH 11 - List of contents
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1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Jack field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Switching on the measuring instrument . . . . . . . . . . . . . . . . . 15
4.2 Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2.2 Measuring the pH value . . . . . . . . . . . . . . . . . . . . . . . 17
4.2.3 Measuring the ORP voltage . . . . . . . . . . . . . . . . . . . . 18
4.3 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.1 AutoCal TEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.3.2 AutoCal DIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3.3 ConCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.5 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 35
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

List of contents handylab pH 11
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handylab pH 11 Overview
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1 Overview
The compact precision handheld meter handylab pH 11 enables you to carry
out pH measurements rapidly and reliably.
The handylab pH 11 provides the maximum degree of operating comfort, re-
liability and measuring certainty for all applications.
The proven calibration procedures and the special AutoRead function sup-
port you in your work with the handylab pH 11.
1Keypad
2Sample display
3Jack field
AR
O
CAL
PH
6
4
2
992
6
°
C
TP
1
2
3
M

Overview handylab pH 11
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1.1 Keypad
Key functions
CAL
RUN/ENTER
AR
M
Select the measuring mode <M>:
–pHvalue
–ORPvoltage
Switch measuring instrument on/off
<ON/OFF>
Calibration of the current measured variable
<CAL>
Activate/deactivate the AutoRead function
<AR>
Select the measuring mode
Increase values, scroll
<▲>
Select the measuring mode
Decrease values, scroll
<▼>
Confirm entries, start AutoRead
<RUN/ENTER>
M
CAL
AR
RUN/ENTER

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1.2 Display
1.3 Jack field
The meter has either a DIN socket or a BNC socket.
The figure shows a meter with DIN socket (1).
Caution
Only connect electrodes to the measuring instrument that cannot return any
voltages or currents that are not allowed
(> SELV and > current circuit with current limiting).
Nearly all electrodes - especially SI Analytics electrodes - fulfill these condi-
tions.
1pH electrode or single-rod measuring electrode
2Reference electrode
3Temperature probe
%
°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
LoBat
AutoCal DIN
CalError
ARng AR
AutoCal TEC
TP
1
UpH
Status display
Meas. value display
Function and
temperature display
Sensor symbol
Ref
12
3

Overview handylab pH 11
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1.4 Technical Data
Dimensions
and weight
Mechanical
structure
Electrical safety
Test certificates
Ambient
conditions
pH/ORP
measuring ranges
Precision of
pH/ORP
(± 1 digit)
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
humidity
< 90 % of annual average
Measuring range Resolution
pH - 2.000 ... + 19.999
- 2.00 ... + 19.99
0.001
0.01
U [mV] - 999.9 ... + 999.9
- 1999 ... + 1999
0.1
1
T [°C] - 5.0 ... + 105.0 0.1
pH
(± 2 pH units from the
calibration point)
± 0.005 at + 15 °C ... + 35 °C
± 0.01
U [mV] ± 0.3 at + 15 °C ... + 35 °C
± 1
T [°C] NTC 30:
Accuracy ± 0.1
PT 1000:
Accuracy Operating temperature
± 0.5 0 °C ... 15 °C
± 0.1 15 °C ... 35 °C
± 1 35 °C ... 55 °C

handylab pH 11 Overview
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Correction
function
Power supply
Applicable
guidelines and
norms
Temperature input
Manually [°C] - 20 ... + 130
Batteries 4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life Approx. 5000 operating hours
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
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.

Overview handylab pH 11
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handylab pH 11 Safety
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2Safety
This operating manual contains basic instructions that you must follow during
the commissioning, operation and maintenance of the pH meter. Conse-
quently, 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
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.
Further notes
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
pH and ORP measurement in the field and laboratory.
The technical specifications as given in section 1.4 TECHNICAL DATA must be
observed. Only the operation and running of the measuring instrument ac-
cording to the instructions given in this operating manual is authorized.
Any other use is considered to be unauthorized.

Safety handylab pH 11
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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 TECHNICAL
DATA).
It left the factory in a safe and secure technical condition.
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 oper-
ation.
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 TECHNICAL DATA.
If the instrument was transported from a cold environment to a warm environ-
ment, the formation of condensate can lead to the faulty functioning of the in-
strument. 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:
zhas been damaged in transport
zhas been stored under adverse conditions for a lengthy period of time
zis visibly damaged
zno longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the instrument.
Obligations of the
purchaser
The purchaser of the measuring instrument must ensure that the following
laws and guidelines are observed when using dangerous substances:
zEEC directives for protective labor legislation
zNational protective labor legislation
zSafety regulations
zSafety datasheets of the chemical manufacturers.

handylab pH 11 Commissioning
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3 Commissioning
3.1 Scope of delivery
zHandheld meter, handylab pH 11
zOperating manual and short operating manual
z4 batteries, 1.5 V Mignon type AA (in the instrument)

Commissioning handylab pH 11
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handylab pH 11 Operation
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4 Operation
4.1 Switching on the measuring instrument
Note
The measuring instrument has an energy saving feature to avoid unneces-
sary battery depletion. The energy saving feature switches the measuring in-
strument off if no key has been pressed for an hour. The energy saving
feature is not active when the AutoStore function is active.
1Press the <ON/OFF> key.
The display test appears briefly on the display.
Subsequently, the slope and asymmetry used appear for ap-
prox. 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 ini-
tialization).
The measuring instrument then automatically switches to the
measuring mode that was last selected.

Operation handylab pH 11
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4.2 Measuring
4.2.1 General information
You can measure the following variables:
zpH value
zORP voltage
Preparatory
activities
Perform the following preparatory activities when you want to measure:
Note
Incorrect calibration of pH electrodes leads to incorrect measured values.
Calibrate regularly before measuring.
Temperature
sensor
You can measure with or without a temperature sensor. If a temperature sen-
sor is connected, it is indicated on the display by TP.
Note
The measuring instrument automatically recognizes the type of the tempera-
ture sensor used. Therefore, you can connect temperature sensors of the
NTC30 or Pt1000 type.
The temperature measurement is absolutely essential for a reproducible pH
measurement. If the measurement is made without a temperature sensor,
proceed as follows:
1Connect the electrode to the measuring instrument.
2 Adjust the temperature of the buffer solutions or test solutions,
or measure the current temperature, if you measure without a
temperature sensor.
3In conjunction with the electrode, check or calibrate the mea-
suring instument. How to calibrate is described in section 4.3.
4 Select the measuring mode with <M>.
1Measure the current temperature of the test sample using a
thermometer.
2 Enter the temperature on the instrument: Set the temperature
value of the test sample using <▲> <▼>.

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4.2.2 Measuring the pH value
Setting the
resolution
The measuring instrument shows the pH value with a resolution of 0.01 or
0.001. (Default setting is 0.01). To change the resolution, press the <M> key
while pressing the <RUN/ENTER> key.
AutoRead
(drift control)
The AutoRead function (drift control) checks the stability of the measurement
signal. The stability has a considerable impact on the reproducibility 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 <M> key until pH appears on the status display. The
pH value appears on the display.
mV/pH
mol/L
8
Auto Store
TempError
RCL
LoBat
AutoCal DIN
CalError
ARng AR
AutoCal TEC
ConCal
Time
Baud
Day.Month No.
Ident
Year
1
U
%
°F
S
mg/L
% ppm
ISE
8
4
2
299
6
°C
TP
pH
Reproducibility Response time
Better than 0.02 > 30 seconds
1Call up the pH measuring mode with <M> and <▲> <▼> .
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).
3Start AutoRead with <RUN/ENTER>.
AR flashes until a stable measured value is reached.
This measured value is transmitted to the interface.
4 If necessary, start the next AutoRead measurement with
<RUN/ENTER>.
5To terminate the AutoRead function: Press the <AR> key.

Operation handylab pH 11
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Note
The current AutoRead measurement can be terminated at any time (accept-
ing the current value) by pressing <RUN/ENTER>.
4.2.3 Measuring the ORP voltage
In conjunction with an ORP electrode, e.g. BlueLine 31Rx, the measuring in-
strument can measure the ORP voltage (U) of a solution.
Note
ORP electrodes are not calibrated. However, you can check ORP electrodes
using a test solution.
1Perform the preparatory activities according to section 4.2.1.
2 Immerse the ORP electrode in the test sample.
3Press the <M> key until U appears on the status display.
The ORP voltage (mV) of the test sample appears on the dis-
play.
4 Wait for a stable measured value.
/pH
ConCal
Auto Store
LoBat
AutoCal DIN
CalError
ARng AR
AutoCal TEC
8
pH
1
%
°F
S
Time
Baud
Day.Month No.
Ident
Year
RCL
TempError
mg/L
% ppm
mol/L
ISE
3
1
2
2
0
mV
°C
U
TP
17

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4.3 Calibrating
Why calibrate? pH electrodes age. This changes the asymmetry (zero point) and slope of the
pH electrode. As a result, an inexact measured value is displayed. Calibration
determines the current values of the asymmetry and slope of the electrode
and stores them in the measuring instrument.
Thus, you should calibrate at regular intervals.
When to calibrate? zAfter connecting another electrode
zafter a voltage interruption, e. g. after changing the batteries
You can select between 3 calibration procedures:
AutoCal TEC is specially adapted to the SI Analytics technical buffer solutions as a fully au-
tomatic two-point or three-point calibration. The buffer solutions are auto-
matically recognized by the measuring instrument. Depending on the
instrument setting (see section 4.4 CONFIGURATION), the instrument displays
the relevant buffer nominal value or the current electrode voltage in mV. The
calibration can be terminated after the first buffer solution. This corresponds
to a single-point calibration. For this, the instrument uses the Nernst slope
(-59.2 mV/pH at 25 °C) and determines the asymmetry of the electrode.
AutoCal DIN is specially adapted to the permanently programmed buffer solutions in ac-
cordance with DIN19266 as a fully automatic two-point or three-point cali-
bration. The buffer solutions are automatically recognized by the measuring
instrument. Depending on the instrument setting (see section
4.4 CONFIGURATION), the instrument displays the relevant buffer nominal val-
ue or the current electrode voltage in mV. The calibration can be terminated
after the first buffer solution. This corresponds to a single-point calibration.
For this, the instrument uses the Nernst slope (-59.2 mV/pH at 25 °C) and de-
termines the asymmetry of the electrode.
ConCal This function is a conventional two-point calibration using two buffer solu-
tions (pH 7.0 ± 0.5 and any other buffer solution) or a single-point calibra-
tion using any buffer solution and is used as a high-speed method.
AutoRead When calibrating with AutoCal TEC and AutoCal DIN, the AutoRead function
is automatically activated.
The current AutoRead measurement can be terminated at any time (accept-
ing the current value) by pressing <RUN/ENTER>.

Operation handylab pH 11
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Displaying
calibration data
Each time the instrument is switched on, the calibration data are shown on
the display for a short time (see section 4.1 SWITCHING ON THE MEASURING IN-
STRUMENT). In order to view the calibration data, switch the measuring instru-
ment off and switch it on again.
Calibration
evaluation
After the calibration, the measuring instrument automatically evaluates the
current status of the electrode. The asymmetry and slope are evaluated sep-
arately. The worst evaluation appears on the display.
Preparatory
activities
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
Eliminate the error according to
chapter 6 WHAT TO DO IF...
< -30 or
> 30
< -62 or
> -50
1Switch on the measuring instrument with <ON/OFF>.
2 Connect the pH electrode to the measuring instrument.
3Keep the buffer solutions ready.
4 Adjust the temperature of the solutions and measure the cur-
rent temperature if the measurement is made without temper-
ature sensor.