TESTO 230 User manual

testo 230 · pH- and temperature measuring instrument
Instruction manual
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1 Contents
3
1Contents
1Contents ...................................................................................................3
2Safety and the environment....................................................................5
2.1. About this document ........................................................................5
2.2. Ensure safety...................................................................................5
2.3. Protecting the environment..............................................................6
3Specifications ..........................................................................................7
3.1. Use ..................................................................................................7
3.2. Technical data .................................................................................7
4Product description.................................................................................9
4.1. Overview..........................................................................................9
4.1.1. Control elements and connections...................................................................9
4.1.2. Display...........................................................................................................10
4.2. Connection variants.......................................................................11
5First steps ..............................................................................................13
5.1. Commissioning ..............................................................................13
5.1.1. Installing the sensor.......................................................................................13
5.1.2. Switching the instrument on...........................................................................13
5.2. Calibrating the instrument..............................................................14
5.2.1. Single-point calibration...................................................................................14
5.2.2. Two-point calibration......................................................................................16
6Using the product ..................................................................................18
6.1. Performing settings........................................................................18
6.2. Measuring......................................................................................19
6.2.1. pH-measurement ...........................................................................................19
6.2.2. Temperature measurement............................................................................20
6.2.3. Redox measurement......................................................................................20
6.2.4. Hold function..................................................................................................20
6.2.5. Auto-Hold function .........................................................................................21
7Maintaining the product ........................................................................22
7.1. Replacing the battery.....................................................................22
7.2. Cleaning the instrument.................................................................22
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1 Contents
4
8Tips and assistance .............................................................................. 23
8.1. Questions and answers ................................................................ 23
8.2. Accessories and spare parts......................................................... 26
9Appendix................................................................................................ 27
9.1. Electrode/application assignment ................................................. 27
9.2. Buffer table.................................................................................... 30
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2 Safety and the environment
5
2Safety and the environment
2.1. About this document
Use
> Please read this documentation through carefully and
familiarize yourself with the product before putting it to use. Pay
particular attention to the safety instructions and warning advice
in order to prevent injuries and damage to the products.
> Keep this document to hand so that you can refer to it when
necessary.
> Hand this documentation on to any subsequent users of the
product.
2.2. Ensure safety
• Temperatures given on probes/sensors relate only to the
measuring range of the sensors. Do not expose handles and
feed lines to temperatures in excess of 70 °C (158 °F), unless
they are expressly permitted for higher temperatures.
• Degree of protection IP 54 is only ensured with the sensor or
blanking plug plugged in.
• Electrolytic solutions are corrosive; do not bring into contact
with measuring instruments or other sensitive surfaces!
• Ether, ester, cetones as well as aromatic or halogenated
hydrocarbons will attack the shaft material and must therefore
not come in contact with the electrode.
• The electrode housing is partly made of glass,
CAUTION, DANGER OF BREAKAGE!
> Only perform maintenance and repair work on this instrument
that is described in the documentation. Strictly follow the
specified steps. Use only original spare parts from Testo.
> Do not store the product together with solvents. Do not use any
desiccants.
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2 Safety and the environment
6
> Do not perform any contact measurements on uninsulated, live
parts.
> Dangers may also arise from objects to be measured or the
measuring environment: Always comply with the locally valid
safety regulations when performing measurements.
> Only use the product properly, for the purpose it is intended for
and within the parameters specified in the technical data. Do
not apply any force.
2.3. Protecting the environment
> Dispose of faulty rechargeable batteries/spent batteries in
accordance with the valid legal specifications.
> At the end of its useful life, send the product to the separate
collection for electric and electronic devices (observe local
regulations) or return the product to Testo for disposal.
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3 Specifications
7
3Specifications
3.1. Use
The testo 230 serve the purpose of determining pH-values, redox
potentials and temperature in aqueous solutions as well as in semi-
solid to solid media.
3.2. Technical data
Instrument
Feature Values
Measurement range pH 0...14, -50...+150 °C, ±1999 mV
Resolution pH 0.01, 0.1 °C (°F), 1 mV
Accuracy
(± 1 digit)
±0.01 pH
±0.4 °C (-50...-25 °C)
±0.2 °C (-25...+75 °C)
±0.4 °C (+75...+100 °C)
±0.5 % of mv (+100...+150 °C)
±1 mV (0…±999 mV)
±2 mV (±999… ±1999 mV)
Temperature
compensation
man -10...+150 °C
auto -50...+150 °C
Operating
temperature
0...+40 °C
Storage/transport
temperature
-20...+70 °C
Display two-line
Connections BNC compatible socket for pH or pH/°C
resp.
Mini-DIN socket for temperature sensor
Battery life approx. 100 hrs.
Weight 180 g (incl. battery)
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3 Specifications
8
Feature Values
Degree of protection IP 54 (only with plugged in original plug or
blanking plug)
Housing material ABS
Warranty
Terms of warranty see
www.testo.com/warranty
Measuring
instrument
Electrode
Sensor
24 months
12 months
12 months
Electrodes/temperature sensors
Feature Values
pH universal plastic
electrode without
temperature sensor (0650
2063)
Measurement range: 0...14 pH
Operating temperature: 0...+60 °C
short-term up to +80 °C
pH universal plastic
electrode with temperature
sensor (0650 2064)
Measurement range: 0...14 pH
Operating temperature: 0...+60 °C
Temperature sensor: Pt 1000
pH glass electrode with
temperature sensor (0650
1623)
Measurement range: 0...14 pH
Operating temperature: -10...+80 °C
Temperature sensor: Pt 1000
pH food electrode without
temperature sensor (0650
0245)
Measurement range: 2...14 pH
Operating temperature: 0...+40 °C
Rugged NTC penetration
food sensor with special
handle, reinforced PUR line
(0613 2411)
Measurement range: -25...+150 °C
t99: 7 s
Stainless steel NTC food
sensor (IP65) with PUR line
(0613 2211)
Measurement range: -50...+150 °C.
t99: 8 s
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4 Product description
9
4Product description
4.1. Overview
4.1.1. Control elements and connections
1Display see Display page 10
2Keyboard
Key Function
Switching on/off
To call up individual menu levels
To hold readings or, with manual input function, set
readings
To select menu options or, with manual input
function, set readings
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4 Product description
10
3 Battery compartment (on rear)
4 BNC connecting socket for pH and redox electrode
5Mini-DIN connecting socket for NTC temperature sensor
4.1.2. Display
1Reading (pH/mV, °C for temperature measurements without pH
electrode)
2DIN/NBS buffer (display in alignment menu)
3Reading (°C for temperature measurements)
4Auto-Off display: The circle segments in the display go out in a
2.5 minute interval. After the last segment (10 minutes) the
instrument switches off. Switching off the function, see
Switching Auto-Off on / off page 18.
5Sensor detection
Icon Function
Man Electrode without temperature sensor
+Auto
External temperature sensor
Auto Electrode with temperature sensor
6Representation of alignment menu
7Hold function / Auto-Hold function
8Battery control:
• When switching on Battery voltage
• In operation: Warning of weak battery
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4 Product description
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4.2. Connection variants
Measurement Probes function Display
pH /
temperature
measurement
pH-electrode with
integrated
temperature
sensor (0650
1623, 0650 2064)
The pH-electrode is used
to determine pH-value and
temperature of the
medium.
During measurement and
alignment the medium
temperature is
automatically included in
the process.
pH /
temperature
measurement
pH-electrode
without integrated
temperature
sensor (0650
2063, 0650 0245)
NTC-sensor with
Mini-DIN
connection
The pH-electrode is used
to determine the pH-value,
the medium temperature is
measured with the NTC-
sensor.
During measurement and
alignment the medium
temperature is
automatically included in
the process.
pH-
measurement
pH-electrode
without integrated
temperature
sensor (0650
2063, 0650 0245)
The pH-electrode is used
to determine the pH-value
of the medium.
During measurement and
calibration the medium
temperature must be
entered manually.
Temperature
measurement
NTC-sensor with
Mini-DIN plug
With the NTC-sensor the
testo 230 is a fully
adequate temperature
measuring instrument to
cover the range from
-50 °C ... +150 °C.
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4 Product description
12
Measurement Probes function Display
Redox
measurement
Redox electrode1The redox electrode is
used to determine the
redox potential of the
medium.
With the NTC-sensor the
temperature can
additionally be determined.
However, the temperature
has no influence on the
redox measurement.
1no longer available
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5 First steps
13
5First steps
5.1. Commissioning
5.1.1. Installing the sensor
Before the instrument is switched on the electrode cable must be
connected.
1. Plug the BNC-plug of the electrode into the socket and turn
clockwise to lock.
2. Plug the external NTC-sensor with Mini-DIN plug or blanking
plug into the socket.
IP-protection (IP 54) is only ensured with the NTC-sensor
or blanking plug plugged in.
3. If desired: Fasten the electrode or the NTC-sensor with the
holder on the instrument.
5.1.2. Switching the instrument on
> press I/O.
- The display and function test appears in the display.
- The battery condition is displayed.
- The instrument is ready to use.
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5 First steps
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5.2. Calibrating the instrument
Before the first measurement the instrument must generally be
calibrated (singe-point or two-point).
For measurements in extreme solutions (pH-value < 1 and pH-
value > 12), for frequent use and if very high accuracy is required,
the unit should be calibrated before each measurement.
5.2.1. Single-point calibration
Single-point calibration serves the purpose of quickly adapting the
instrument to the electrode.
The following buffers can be used for this purpose:
• Testo buffer pH 4, pH 7, pH 10
• DIN buffer pH 4.0082; pH 6.8652; pH 9.18
Also pay attention to the application information for the
buffer used.
1. Connect the electrode to the instrument.
If a plug is present:
> Open the plug on the electrode (to equalise pressure).
2. Pull the rinsing cap off the electrode.
3. Rinse the electrode in water, dab off and place it into the buffer
solution
4. press I/O.
5. press several times, until CAL appears in the display.
- CAL (status bar) flashes in the display.
6. Press SELECT to confirm.
> If an electrode without temperature sensor and no external
temperature sensor is used, enter the temperature manually via
HOLD and SELECT.
- Wait 5 seconds, the instrument accepts the set temperature.
- The display shows bu 1.
2Display reading: DIN/NBS pH 4.01, pH 6.87
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5 First steps
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7. Press HOLD to select the buffer to be used (pH 1.68 DIN/NBS;
4.00; 4.008 DIN/NBS2; 6.865 DIN/NBS2; 7.00; 9.18 DIN/NBS;
10.00).
- pH flashes in the display.
8. Press SELECT to start the calibration process.
- During the calibration process CAL is flashing (duration of
calibration min. 20 sec., max 10 min.). An audible signal informs
about the end of the calibration process.
After max. 10 min. the calibration process is aborted, the
electrode is most likely defective, in this case consult our
service department. Contact data see back of this
document or website www.testo.com/service-contact.
- The display shows bu 2. This menu option is needed for two-
point calibration, see Two-point calibration page 16.
9. Press to exit the menu.
- The display shows the default gradient value -58.0mV/pH.
10. Press SELECT to confirm.
- The display shows the unbalancing voltage.
11. Press SELECT to confirm.
- Single-point calibration has been completed.
- The instrument changes to the measurement mode. Measuring
page 19.
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5 First steps
16
5.2.2. Two-point calibration
Two-point calibration serves the purpose of accurately adapting the
instrument to the electrode.
The following buffer sets can be used for calibration:
• Testo buffer set pH 4/7, pH 4/7/10
• DIN buffer set pH 4.008/6.6853, pH 6.865/9.183
Also pay attention to the application information for the
buffer used.
The difference between buffer solutions bu 1 and bu 2
must be higher than 0.64 pH.
1. Connect the electrode to the instrument.
If a plug is present:
> Open the plug on the electrode (to equalise pressure).
2. Pull the rinsing cap carefully off the electrode.
3. Rinse the electrode in water, dab off and place it into the first
buffer solution
4. press I/O.
5. press several times, until CAL appears in the display.
- CAL (status bar) flashes in the display.
6. Press SELECT to confirm.
- The temperature is displayed.
> If an electrode without temperature sensor and no external
temperature sensor is used, enter the temperature manually via
HOLD and SELECT.
- Wait 5 seconds, the instrument accepts the set temperature.
- The display shows bu 1.
3Display reading: DIN/NBS pH 4.01, pH 6.87
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5 First steps
17
7. Press HOLD to select the buffer to be used (pH 1.68 DIN/NBS;
4.00; 4.008 DIN/NBS3; 6.865 DIN/NBS3; 7.00; 9.18 DIN/NBS;
10.00).
- pH flashes in the display.
8. Press SELECT to start the calibration process.
- During the calibration process CAL is flashing (duration of
calibration min. 20 sec., max 10 min.). An audible signal informs
about the end of the calibration process.
After max. 10 min. the calibration process is aborted, the
electrode is most likely defective, in this case consult our
service department. Contact data see back of this
document or website www.testo.com/service-contact.
- The display shows bu 2.
9. Rinse the electrode in water, dab off and place it into the
second buffer solution
10. Press HOLD to select the buffer to be used.
11. Press SELECT to start the calibration process.
- During the calibration process CAL is flashing (duration of
calibration min. 20 sec., max. 10 min.). An audible signal
informs about the end of the calibration process.
After max. 10 min. the calibration process is aborted, the
electrode is most likely defective, in this case consult our
service department. Contact data see back of this
document or website www.testo.com/service-contact.
- The display shows the gradient value.
12. Press SELECT to confirm.
- The display shows the unbalancing voltage.
13. Press SELECT to confirm.
- Two-point calibration has been completed.
- The instrument changes to the pH-measurement mode.
Measuring page 19.
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6 Using the product
18
6Using the product
6.1. Performing settings
testo 230 has a configuration menu in which the following
successive settings can be made:
1Change measuring unit from °C to °F and vice-versa.
2Switch Auto-Off function on or off.
3In Clear mode the values saved by an alignment can be
overwritten, e.g. if the electrode needs to be changed and an
alignment is not possible.
Changing the unit
✓ The instrument is switched off.
1. Keep HOLD depressed and tap I/O instantaneously.
2. Keep HOLD depressed, until the segment test is finished.
- °C or °F flashes in the display.
3. Use SELECT to set the desired unit.
4. Press HOLD to confirm.
- Off (Auto-Off) flashes in the display.
Switching Auto-Off on / off
The Auto-Off function prolongs the lifetime of the battery
and protects the environment. Always make sure that the
instrument is switched off when the Auto-Off function is
disabled.
5. Press SELECT to switch the Auto-Off on (on) or off (off).
6. Press HOLD to confirm.
- The display shows clr no (flashing).
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6 Using the product
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Performing a reset (Clear mode)
7. Press SELECT to select yes.
> If no is selected, the previous values will be maintained.
8. Press HOLD to acknowledge.
- The previously valid values will be deleted and the ideal values
(-58 mv/pH and 0 mV) will be saved in the instrument.
- The instrument changes to the measurement mode.
6.2. Measuring
6.2.1. pH-measurement
✓ Single or two-point alignment has been made, see Calibrating
the instrument page 14.
1. Connect the electrode to the instrument.
If a plug is present:
> Open the plug on the electrode (to equalise pressure).
2. Pull the rinsing cap off the electrode.
3. Rinse the electrode in water and dab off (see also operating
instructions for pH-electrodes).
4. Place the electrode into the measuring solution.
5. press I/O.
- The display shows pH-value (initially unstable) and
temperature. If the display reading is stable, the measuring
value is correct.
If an electrode without temperature sensor and no external
temperature sensor is used, enter the temperature manually.
1. Press SELECT.
- MAN flashes in the display.
2. Press HOLD and SELECT to correct the value upwards or
downwards.
- Wait 5 seconds, the instrument accepts the set temperature.
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6 Using the product
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6.2.2. Temperature measurement
✓ NTC sensor connected.
1. Place the NTC sensor into the measuring solution.
2. Press I/O.
3. Press three times.
- The temperature is displayed. If the display reading is stable,
the measuring value is correct.
Back to the pH measurement menu:
> Press two times.
6.2.3. Redox measurement
✓ Redox electrode connected.
1. Place the redox electrode into the measuring solution.
2. Press I/O.
3. Press two times.
- The redox potential (initially unstable) is displayed. If the display
reading is stable, the measuring value is correct.
Back to the pH measurement menu:
> Press two times.
6.2.4. Hold function
With HOLD the reading can be held during a progressing
measurement.
> Press HOLD.
- The display shows Hold besides the reading.
- The reading is held in the display as long as desired, the Auto-
Off function is disabled.
Quit:
> Press HOLD.
- The current reading is shown.
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