handylab pH 12
Table of contents
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Operating manual
AR
O
RCL
STO
C
A
L
P
H
6
4
2
9
9
2
6
°
C
TP
M
handylab pH 12
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pH Pocket 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
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handylab pH 12 List of contents
handylab pH 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 Authorized use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . 19
4.3 Calibrating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.1 AutoCal TEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.3.2 AutoCal DIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.3 ConCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.4 Saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.4.1 Saving manually . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.4.2 Saving automatically . . . . . . . . . . . . . . . . . . . . . . . . . 36
4.4.3 Outputting the data storage . . . . . . . . . . . . . . . . . . . . 38
4.4.4 Clearing the memory . . . . . . . . . . . . . . . . . . . . . . . . . 43
4.5 Transmitting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4.5.1 Data transmission interval (Int 2) . . . . . . . . . . . . . . . . 44
4.5.2 Recorder (analog output) . . . . . . . . . . . . . . . . . . . . . . 46
4.5.3 PC/external printer (RS232 interface) . . . . . . . . . . . . 47
4.5.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4.6 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4.7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
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5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . . . . . 53
5.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3
List of contents handylab pH 12
6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7 Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4
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handylab pH 12 Overview
AR
O
RCL
STO
C
A
L
P
H
6
4
2
9
9
2
6
°
C
TP
1
2
3
M
1 Overview
The compact precision handheld meter handylab pH 12 enables you to carry
out pH measurements rapidly and reliably.
The handylab pH 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 pH 12.
1 Keypad
2 Sample display
3 Jack field
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5
Overview handylab pH 12
CAL
RUN/ENTER
AR
STO
RCL
M
M
STO
CAL
RCL
AR
RUN/ENTER
1.1 Keypad
Key functions
Select the measuring mode <M>:
–pH value
–ORP voltage
Save a measured value
<STO>
Switch measuring instrument on/off
<ON/OFF>
Calibration of the current measured variable
<CAL>
Display/transmit measured values
<RCL>
Activate/deactivate the AutoRead function
<AR>
Select the measuring mode
Increase values, scroll
<▲>
6
Select the measuring mode
Decrease values, scroll
<▼ >
Confirm entries, start AutoRead
<RUN/ENTER>
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handylab pH 12 Overview
%
°F
S
Tem pEr ro r
mg/L
% ppm
mol/L
ISE
RCL
8
8.
8
88
8
8
mV/pH
°C
LoBat
AutoCal DIN
CalError
ARng
AR
AutoCal TEC
TP
1
UpH
Time
Baud
Day.Month No.
Ident
Year
Auto
Store
ConCal
Status display
Meas. value display
Function and
temperature display
Sensor symbol
R
e
f
5
123
4
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).
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1 pH electrode or single-rod measuring electrode
2 Reference electrode
3 Plug-in power supply (optional)
4 Temperature probe
5 Serial interface RS 232 / analog output (recorder)
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 conditions.
7
Overview handylab pH 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
pH/ORP
measuring ranges
Precision of
pH/ORP
(± 1 digit)
Measuring range Resolution
pH - 2.000 ... + 19.999
- 2.00 ... + 19.99
U [mV] - 999.9 ... + 999.9
- 1999 ... + 1999
0.001
0.01
0.1
1
T [°C] - 5.0 ... + 105.0 0.1
pH
(± 2 pH units from the
± 0.005 at + 15 °C ... + 35 °C
± 0.01
calibration point)
U [mV] ± 0.3 at + 15 °C ... + 35 °C
± 1
8
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handylab pH 12 Overview
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
Correction
function
Temperature input
Manually [°C] - 20 ... + 130
Analog output Automatic switchover if a recorder is connected.
Output signal Corresponds to the electrode voltage,
i.e. 50-62 mV/pH unit
Accuracy ± 0.1 % of the measured value ± 4 mV
Internal resistance < 5 Ohm (current limited to max. 0.2 mA
output current)
Serial interface Automatic switchover if 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
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Parity None
Handshake RTS/CTS + Xon/Xoff
Cable length Max. 15 m
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Overview handylab pH 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.
Power supply
Applicable
guidelines and
norms
Batteries 4 x 1.5 V alkali-manganese batteries, Type
AA
Operational life Approx. 5000 operating hours
Mains operation 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.
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
10
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handylab pH 12 Safety
2Safety
This operating manual contains basic instructions that you must follow during
the commissioning, operation and maintenance of the pH meter. 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
pH and ORP measurement 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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Safety handylab pH 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.
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handylab pH 12 Commissioning
3 Commissioning
3.1 Scope of delivery
z Handheld meter, handylab pH 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.
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12 Set the current time with <▲> <▼>.
13 Confirm with <RUN/ENTER>.
The instrument switches to the pH measuring mode.
13
Commissioning handylab pH 12
Ref
2
1
3
Connecting the
plug-in power sup-
ply (option)
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.
14
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handylab pH 12 Operation
4 Operation
4.1 Switching on the measuring instrument
1 Press the <ON/OFF> key.
The display test appears briefly on the display.
Subsequently, the slope and asymmetry used appear for approx. one second one after the other. In addition, the calibration
procedure of the last calibration is shown (AutoCal TEC or
AutoCal DIN or no display in the delivery state or following initialization).
The measuring instrument then automatically switches to the
measuring mode that was last selected.
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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Operation handylab pH 12
4.2 Measuring
4.2.1 General information
You can measure the following variables:
z pH value
z ORP voltage
Preparatory
activities
Perform the following preparatory activities when you want to measure:
1 Connect 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.
3 In 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>.
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.
Note
Incorrect calibration of pH electrodes leads to incorrect measured values.
Calibrate regularly before measuring.
16
Temperature
sensor
You can measure with or without a temperature sensor. If a temperature sensor is connected, it is indicated on the display by TP.
Note
The measuring instrument automatically recognizes the type of the temperature sensor used. Therefore, you can connect temperature sensors of the
NTC30 or Pt1000 type.
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handylab pH 12 Operation
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
29
9
6
°C
TP
pH
The temperature measurement is absolutely essential for a reproducible pH
measurement. If the measurement is made without a temperature sensor,
proceed as follows:
1 Measure 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 <▲ > <▼>.
4.2.2 Measuring the pH value
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the pH electrode in the test sample.
Setting the
resolution
3 Press the <M> key until pH appears on the status display. The
pH value appears on the display.
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.
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Operation handylab pH 12
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:
Reproducibility Response time
Better than 0.02 > 30 seconds
1 Call up the pH measuring mode with <M> and <▲> <▼> .
2 Activate the AutoRead function with <AR>.
The current measured value is frozen (hold function).
3 Start 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>.
5 To terminate the AutoRead function: Press the <AR> key.
Note
The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.
18
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handylab pH 12 Operation
/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
1
7
4.2.3 Measuring the ORP voltage
In conjunction with an ORP electrode, e.g. BlueLine 31Rx, the measuring instrument can measure the ORP voltage (U) of a solution.
1 Perform the preparatory activities according to section 4.2.1.
2 Immerse the ORP electrode in the test sample.
3 Press the <M> key until U appears on the status display.
The ORP voltage (mV) of the test sample appears on the display.
4 Wait for a stable measured value.
Note
ORP electrodes are not calibrated. However, you can check ORP electrodes
using a test solution.
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Operation handylab pH 12
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? z After connecting another electrode
z When the sensor symbol flashes:
– after the calibration interval has expired
– after a voltage interruption, e. g. after changing the batteries
Calibration interval The calibration interval (Int 3) is set to 7 days in the factory. You can select
the interval in the range of 1 ... 999 days (see section 4.6 C
You can select between 3 calibration procedures:
ONFIGURATION).
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 4.6 C
ONFIGURATION), 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
4.6 C
ONFIGURATION), 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 determines 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
Displaying
calibration data
20
is automatically activated.
The current AutoRead measurement can be terminated at any time (accepting the current value) by pressing <RUN/ENTER>.
Each time the instrument is switched on, the calibration data are shown on
the display for a short time (see section 4.1 S
STRUMENT). In order to view the calibration data, switch the measuring instru-
WITCHING ON THE MEASURING IN-
ment off and switch it on again.
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handylab pH 12 Operation
CALIBRATION PROTOCOL
02.03.99 14:19
Device No.: 12345678
Calibration pH
Cal time: 01.03.99 / 15:20
Cal interval: 7d
AutoCal DIN Tauto
Buffer 1 1.679
Buffer 2 4.008
Buffer 3 6.865
Buffer 4 9.180 *
C1 174.1 mV 25.0°C
C2 -133.3 mV 25.0°C
S1 -59.4 mV/pH
ASY1 - 4 mV
Probe: +++
Printing the
calibration
record
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 42).
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.
Sample printout:
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