ProMinent Portamess 911 pH User manual

Instruction Manual
Portamess911 pH
ProMinent Dosiertechnik GmbH •D-69123 Heidelberg •Germany

Software version: 3.x
TA–193.102–PME01 121101
ProMinent Dosiertechnik GmbH
Im Schuhmachergewann 5–11
D-69123 Heidelberg
Postfach 10 17 60
D-69007 Heidelberg
Telephone: [phone]
Fax: [phone]
[email protected]
www.prominent.de
We reserve the right to make technical changes.

Information III
Safety Precautions
Be sure to read and observe the following re-
quirements!
Whenever it is likely that the protection has been impaired, the meter shall
be made inoperative and secured against unintended operation.
The protection is likely to be impaired if, for example:
❏the meter shows visible damage
❏the meter fails to perform the intended measurements
❏after prolonged storage at temperatures above 70 °C
❏after severe transport stresses
Before recommissioning the meter, a professional routine test according to
EN 61 010-1 shall be performed. This test should be carried out at our facto-
ry.

cal
Note
Warning
Information IV
Information on this Instruction Manual
Italics are used for texts which appear in the Portamess
911 pH display.
Bold print is used to represent keys,
e.g. cal.
Display examples
or
keys whose functions are explained are frequently shown
in the left-hand column.
Notes provide important information that should be strictly
followed when handling the meter.
Warning means that the instructions given must always be
followed for your own safety. Failure to follow these instruc-
tions may result in injuries.

Contents V
Contents
Safety Precautions III. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Information on this Instruction Manual IV. . . . . . . . . . . . . . . . . . . . . . . . . .
1 The Model 911 pH 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Contents 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short Description of Meter 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Operation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Meter Design 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keypad 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SensofaceElectrode Monitoring 5. . . . . . . . . . . . . . . . . . . . . . . . . .
Connection and Start-up 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Measurement 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Troubleshooting and Maintenance 17. . . . . . . . . . . . . . . . . . . . . . . . . . .
SensofaceElectrode Monitoring 17. . . . . . . . . . . . . . . . . . . . . . . . . .
Error Messages 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories Available 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications Portamess911 pH 25. . . . . . . . . . . . . . . . . . . . . . . . .
4 General Information on Measurement 27. . . . . . . . . . . . . . . . . . . . . . . .
Notes on pH Measurement 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents VI

The Model 911 pH 1
1 The Model 911 pH
Package Contents
Please check the completeness of the package after un-
packing.
The package should include:
❏Portamess911 pH (ready for operation)
❏Carrying strap
❏This instruction manual
❏Short instructions in German, English and French
❏Field case
Short Description of Meter
❏The Portamess911 pH is used for pH and temperature
measurement in industry, environment, food processing
and waste-water treatment.
❏The meter meets the European EMC regulations
(89-336-EEC) and the recommendations of NAMUR
NE 21.
❏The meter is IP 66 protected to EN 60529 (jet water
from all directions).
❏Temperature compensation is automatic with a Pt 1000
temperature probe, an NTC 30 kW(automatic recogni-
tion during power-on) or through manual temperature
input.
❏Calibration can be carried out with buffer solutions from
various, preselectable buffer sets. The buffer is then
automatically recognized by the Calimatic.
❏You can also calibrate manually by entering individual
buffer values.

The Model 911 pH 2
❏The Sensofaceelectrode monitoring system checks
the connected electrode and provides information on its
state.
❏Only three alkaline AA batteries are required for uninter-
rupted operation for approx. 2,000 hours.

Operation 3
2 Operation
Meter Design
1234
5
1 Electrode connection
3 Reference electrode
2, 3 Temperature probe connection
4 Unused
5 Electrode container
meas cal
on/off
Y
B
Portamess

on/off
Note
meas
cal
Operation 4
Display
Senso-
face
Battery
empty
Rinse
electrodeStir buffer
solution
Electrode
response
time Press cal
key
Wait
Manual
temperature
detection
Temperature
detection
using Pt1000/
NTC
Zero/
slope
Main
display
Secondary
display
Measure-
ment
symbol
Error
message
Keypad
Pressing on/off switches the meter on or off. When the
meter is switched off, one of the Sensofacestatus indica-
tors is visible in the display. After power-on, the meter au-
tomatically performs a self test and checks which tempera-
ture probe is connected. After that it automatically goes to
pH measuring mode.
The meter can also be switched on with meas. However,
in this case only a short test is performed and the tempera-
ture probe is not determined. The meter assumes that the
last temperature probe determined is used.
Pressing meas selects the desired measured variable (pH
or mV) for the main display.
Pressing cal starts calibration. With calibration the meter
is adjusted to the electrode. You can choose between one,
two or three-point calibration either using Calimaticauto-
matic buffer recognition or with manual buffer entry.

Y B
cal on/off
+
Note
Electrode
connection
Operation 5
For manual temperature specification (no temperature
probe connected), the temperature is set using Yand B.
During buffer selection, you can select the buffer set using
Yand B.
Pressing cal + on/off when the meter is switched off,
activates buffer selection.
When pressing two keys at the same time, make sure that
the key shown at the left is pressed first.
SensofaceElectrode Monitoring
The Sensofaceautomatic electrode monitoring system
provides information on the electrode state. Zero point,
slope, response time, impedance and drying out are evalu-
ated.
For more detailed information on the displayed electrode
state and the individual evaluations of the parameters,
please see chapter “Troubleshooting and Maintenance”
(Pg. 17).
Connection and Start-up
Commercially available electrodes with a nominal elec-
trode zero point of pH 7 and the following plugs can be
connected:
–Coaxial standard plug to DIN 19 262
and/or
–4 mm banana plug.

Connection
assignment
Note
Start-up
Note
on/off
Operation 6
Connection Socket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination electrode 1. . . . . . . . . . . . . . . . . . . . . . . .
Single measuring electrode 1. . . . . . . . . . . . . . . . . . . .
Single reference electrode 3. . . . . . . . . . . . . . . . . . . . .
Integrated temperature probe of
combination electrodes 2. . . . . . . . . . . . . . . . . . . . . . .
Separate temperature probe 2, 3. . . . . . . . . . . . . . . . .
Unused 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1234
If no temperature probe has been connected, the meter
operates with the manually set temperature and man ap-
pears in the display.
Prior to first measurement, the buffer set to be used must
be selected and the meter calibrated.
With the meter switched-off, one of the Sensofacestatus
indicators is always visible.
Even with the meter switched off, the calibration data re-
main permanently stored.
Pressing on/off switches the meter into measuring mode.
After power-on, the meter determines the connected tem-
perature probe and performs a self test:
❏Simultaneous appearance of all display segments, sym-
bols and Sensofaceindicators
❏Display of Model No. 911
❏Display of software version
❏Display of selected buffer set

Note
Note
Operation 7
The temperature probe is only recognized during the
power-on procedure after pressing on/off.
The meter can also be switched on with meas. However,
in this case only a short test is performed and the tempera-
ture probe is not determined. The meter assumes that the
last temperature probe determined is used.

Note
cal on/off
+
Y B
cal
meas
Automatic
or manual
calibration
Operation 8
Configuration
If you calibrate using the ProMinent buffer set, generally
you do not have to change the configuration.
The following basic settings can be changed in the configu-
ration:
❏Automatic calibration (Calimatic)
on or off (manual), buffer set for automatic
calibration
❏Three-point calibration on or off
To activate the configuration hold down cal with the meter
switched off and then press on/off.
The menu items of the configuration menu are worked
through in sequence.
To change the setting of the respective menu item, press
Yor B.
Pressing cal switches to the next menu item and stores
the displayed settings.
Pressing meas exits the configuration menu at any time.
The value last displayed and possibly hanged will then not
be saved.
By pressing the Yor Bkey, you can select whether you
wish to calibrate with the Calimaticautomatic buffer rec-
ognition system or with manual entry of the individual
buffer values.
When calibrating with Calimaticautomatic buffer recogni-
tion (AutCal on), you only have to enter the buffer set used
once in the configuration menu. The buffer values are
stored at the correct temperature. During calibration the
meter then automatically recognizes the buffer used (fac-
tory setting: automatic calibration on, ProMinent buffer
solution).

Buffer
selection
cal
cal
meas
Note
Operation 9
Press cal to display the current buffer set.
With Yor Byou can select the buffer set with the buffers
used.
Pressing cal enters the choice and returns you to measur-
ing mode.
Pressing meas exits the buffer selection function without
storing the buffer set.
The following calibration buffer sets are permanently stored
in the meter:
BUFFER –00– Knick technical buffers
pH 2.00 4.01 7.00 9.21
BUFFER –01– Mettler Toledo technical buffers
(former Ingold)
pH 2.00 4.01 7.00 9.21
BUFFER –02– ProMinent
pH 2.00 4.00 7.00 9.00
BUFFER –03– DIN 19 267
pH 1.09 4.65 6.79 9.23 12.75
BUFFER –04 Ciba (94)
pH 2.06 4.00 7.00 10.00
BUFFER –05– NIST
pH 1.68 4.00 7.00 10.01 12.46
BUFFER –06– DIN 19 266 and NIST (NBS)
pH 1.679 4.006 6.865 9.180
BUFFER –07– HACH
pH 4.00 7.00 10.18
The meter can only operate properly if the buffer solutions
used correspond to the selected, activated buffer set.
Other buffer solutions, even those with the same nominal
values, demonstrate a different temperature behavior. This
leads to measurement errors.

Three-point
calibration
on/off
Operation 10
For manual buffer specification (AutCal off), the pH value
of the buffer solution must be entered for the correct tem-
perature.
This allows calibration using any other buffer solution.
You can choose whether you want to perform three-point
calibration in addition to one- or two-point calibration.
With three-point calibration turned on (3P-Cal on), you can
calibrate with a third buffer solution after two-point calibra-
tion has been completed. The sequence of the buffer solu-
tions is unimportant. With three-point calibration zero point
and slope are calculated using a mean straight line (to
DIN 19268).
With three-point calibration turned off (3P-Cal off), only
one- or two-point calibration is possible (default setting:
(3P-Cal off).

Note
Calimatic

automatic
calibration
Note
cal
Operation 11
Calibration
By calibration the pH meter is adjusted to zero point and
slope of the electrode used.
For calibrations and measurements at temperatures other
than room temperature, the following must always be ob-
served:
Not only the buffer solution and the measured medium, but
also the electrode must be brought to the corresponding
temperature before the calibration is started or the mea-
sured value is read.
For calibration using Calimaticautomatic buffer recogni-
tion, you only have to enter the buffer set used once in the
configuration menu. With the patented Calimaticsystem,
the meter automatically recognizes the buffer solutions,
calculates the electrode zero point and slope and carries
out the corresponding adjustment.
The meter can only operate properly when the buffer solu-
tions used correspond with the buffer set selected during
buffer selection.
Other buffer solutions, even with the same nominal values,
may demonstrate different temperature behavior, which
leads to measurement errors.
Pressing cal activates calibration.
Calibration can be exited again by pressing meas. If ex-
ited prior to entry of the first calibration point, zero and
slope of the last calibration are displayed for a moment.
Immerse electrode and temperature probe in the first buffer
solution. Either buffer solution can be used first.
Press cal again to start calibration. If you do not want to
calibrate, press meas to cancel the process.

Note
Note
Operation 12
During buffer recognition the lower line indicates the tem-
perature. The hour glass flashes.
The nominal value of the recognized buffer solution is dis-
played for approx. 5 s. Electrode and temperature probe
must remain in the first buffer solution until the display
prompts for the second buffer.
The response times of electrode and temperature probe
are considerably reduced if you first move the electrode in
the buffer solution and then keep it still to read the values.
This provides stable values more quickly.
The electrode stability is checked and the measured mV
value is displayed. Stability check can be overridden with
cal. However, this reduces calibration accuracy.
Calibration with the first buffer is complete. Remove elec-
trode and temperature probe from the first buffer solution
and rinse off both thoroughly.
❏If you want to perform a one-point calibration, press
meas to terminate the calibration now. The meter then
shows the newly determined zero point in the main dis-
play and the old slope in the lower display and returns to
pH measuring mode.
❏For two-point calibration, immerse the electrode and
temperature probe in the second buffer solution. Con-
tinue the calibration with cal. The calibration process
runs again as for the first buffer.
Only with three-point calibration turned on (3P-CAL On,
see Pg. 10) the calibration menu offers the possibility to
evaluate a third buffer solution after two-point calibration
has been completed.
With three-point calibration turned off (3P-CAL OFF,
see Pg. 10) the calibration procedure is automatically en-
ded at this point.

Manual
calibration
cal
Note
Operation 13
With three-point calibration turned on (3P-CAL On), you
can now evaluate a third buffer solution.
❏For two-point calibration, press meas to terminate the
calibration. The meter then shows the newly determined
zero point in the main display and the new slope in the
lower display and returns to pH measuring mode.
❏If you want to perform a three-point calibration, immerse
the electrode and temperature probe in the third buffer
solution. Continue the calibration with cal. The calibra-
tion process runs again as for the previous buffers and
is automatically terminated. Zero and slope are calcu-
lated using a mean straight line (to DIN 19268).
At the end of the calibration the zero point and slope
(based on 25 °C) of the electrode are displayed. Then the
meter switches back to measuring mode.
For calibration with manual buffers, you must first disable
the Calimatic. Then, you must enter the pH of the buffer
solution used for the correct temperature.
This allows calibration with any buffer solution.
Pressing cal activates calibration.
Calibration can be cancelled by pressing meas. In that
case, zero and slope of the last calibration are displayed
for a moment.
Enter the temperature-corrected pH of your buffer solution
using Yand B. Press cal to start the calibration.
The buffer value set is stored so that you do not have to
enter it for the next calibration (which must be performed at
the same temperature).
If the temperature has changed, the pH value must be
adjusted before proceeding.
The response times of electrode and temperature probe
are considerably reduced if you first move the electrode in
the buffer solution and then keep it still to read the values.
This provides stable values more quickly.

Note
Operation 14
The electrode stability is checked and the measured mV
value displayed. Stability check can be overridden with
cal. However, this reduces calibration accuracy.
Calibration with the first buffer is complete. Remove elec-
trode and temperature probe from the first buffer solution
and rinse off both thoroughly.
❏If you want to perform a one-point calibration, press
meas to terminate the calibration now. The meter then
shows the newly determined zero point in the main dis-
play and the old slope in the lower display and returns to
pH measuring mode.
❏For two-point calibration, immerse the electrode and
temperature probe in the second buffer solution. Enter
the pH value of the second buffer solution. Continue the
calibration with cal. The calibration process runs again
as for the first buffer.
Only with three-point calibration turned on (3P-CAL On,
see Pg. 10) the calibration menu offers the possibility to
evaluate a third buffer solution after two-point calibration
has been completed.
With three-point calibration turned off (3P-CAL OFF,
see Pg. 10) the calibration procedure is automatically en-
ded at this point.
❏For two-point calibration, press meas to terminate the
calibration. The meter then shows the newly determined
zero point in the main display and the new slope in the
lower display and returns to pH measuring mode.
❏If you want to perform a three-point calibration, immerse
the electrode and temperature probe in the third buffer
solution. Enter the pH value of the third buffer solution.
Continue the calibration with cal. The calibration pro-
cess runs again as for the previous buffers and is auto-
matically terminated. Zero and slope are calculated us-
ing a mean straight line (to DIN 19268).