TESTO 270 User manual

testo 270 · Deep-frying Oil Tester
Instruction manual

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1 Contents
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Practical tips before commissioning your new testo 270
Dear Customer,
Congratulations on purchasing your new testo 270 cooking oil tester.
All our measuring instruments are factory tested by us before delivery and
adjusted to their own specific level of accuracy. To ensure a consistently high
level of accuracy, we recommend the instrument is regularly checked.
You have the following options with the testo 270 cooking oil tester:
1 Testo factory calibration according to ISO (accuracy +/- 2% TPM1):
You can order an ISO calibration from Testo's calibration subsidiary, Testo
Industrial Services in Kirchzarten, using order number 0520 0028. This
means your testo 270 will be calibrated at two points (at approx. 3% and at
approx. 24% TPM) under precise laboratory conditions.
Furthermore, you have the following options for checking your testo 270 yourself
at any time:
2 with Testo reference oil (accuracy +/- 2.5% TPM1):
With the Testo reference oil (order no. 0554 2650), you can check the
measuring instrument precisely and, if necessary, readjust it (please pay
attention to the description in the instruction manual for this).
3 with the simple function test in cooking oil (accuracy +/- 3% TPM1):
For a simple function test without adjustment, we recommend you carry out
a measurement during the commissioning of your new instrument in unused
cooking oil at 150 to 180 °C.
You should ideally carry out this measurement several times in succession
and note the respective readings. The mean value of these readings
represents your specific reference value for subsequent instrument
checking. To use the determined reference value as a comparative value for
a check, always carry out the measurement for instrument checking in
unused cooking oil at 150 to 180 °C.
Please make sure that the reference value is recalculated if the type of oil or
oil supplier changes.
Your specific reference value:
___________________________
1typically, based on Testo in-house reference, at an ambient temperature of
25 °C.

1 Contents
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1Contents
1Contents .................................................................................................. 4
2Safety and the environment ................................................................... 6
2.1. About this document ....................................................................... 6
2.2. Ensure safety.................................................................................. 7
2.3. Protecting the environment ............................................................. 7
3Specifications.......................................................................................... 8
3.1. Use ................................................................................................. 8
3.2. Technical data................................................................................. 8
4Product description .............................................................................. 10
4.1. Overview....................................................................................... 10
4.2. Basic properties ............................................................................ 12
5First steps.............................................................................................. 13
5.1. Commissioning ............................................................................. 13
5.2. Getting to know the product .......................................................... 15
5.2.1. Switching the instrument on/off...................................................................... 15
5.2.2. Description of important functions and displays ............................................. 15
5.2.2.1. Alarm indicator ................................................................................ 15
5.2.2.2. Setting the TPM limit values ............................................................ 16
5.2.2.3. Hold function ................................................................................... 17
5.2.2.4. Auto-Hold function........................................................................... 17
5.2.2.5. Auto-off function .............................................................................. 17
5.2.2.6. Battery capacity............................................................................... 17
5.2.3. Configuring the instrument............................................................................. 18
5.2.4. Locking / unlocking configurations ................................................................. 20
6Using the product ................................................................................. 22
6.1. General measurement information................................................ 22
6.2. Carrying out measurements.......................................................... 23
6.3. Function test ................................................................................. 25
7Maintaining the product ....................................................................... 26
7.1. Changing batteries........................................................................ 26
7.2. Cleaning the sensor ...................................................................... 26
7.3. Cleaning the housing .................................................................... 27
7.4. Cleaning the plastic case .............................................................. 27
7.5. Calibrating/adjusting the instrument.............................................. 27
8Tips and assistance .............................................................................. 31
8.1. Questions and answers ................................................................ 31
8.2. Accessories and spare parts......................................................... 32

1 Contents
5
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2 Safety and the environment
6
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2Safety and the environment
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2.1. About this document
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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.
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Warnings
Always pay attention to information that is marked by the following
warnings with warning pictograms. Implement the specified
precautionary measures.
Representation Explanation
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WARNING Indicates potential serious injuries
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NOTICE indicates circumstances that may lead to
damage to the products
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Symbols and writing standards
Represen-
tation
Explanation
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Note: Basic or further information.
1. ...
2. ...
Action: more steps, the sequence must be followed.
> ... Action: a step or an optional step.
- ... Result of an action.
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Menu Elements of the instrument, the instrument displays
or the program interface.

2 Safety and the environment
7
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[OK] Control keys of the instrument or buttons of the
program interface.
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... | ... Functions/paths within a menu.
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“...” Example entries
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2.2. Ensure safety
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> Only operate the product properly, for its intended purpose and
within the parameters specified in the technical data. Do not
use any force.
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> Do not operate the instrument if there are signs of damage at
the housing.
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> Dangers may also arise from the systems being measured or
the measuring environment: Note the safety regulations valid in
your area when performing the measurements.
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> Temperatures given on probes/sensors relate only to the
measuring range of the sensors. Do not expose handles and
feed lines to any temperatures in excess of 70 °C unless they
are expressly permitted for higher temperatures.
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> Do not perform contact measurements on non-insulated, live
parts.
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> Transport and store the instrument exclusively in the case
provided in order to avoid damage to the sensor.
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> Do not store the product together with solvents. Do not use any
desiccants.
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> Carry out only the maintenance and repair work on this
instrument that is described in the documentation. Follow the
prescribed steps exactly. Use only original spare parts
from Testo.
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2.3. Protecting the environment
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> Dispose of faulty rechargeable batteries/spent batteries in
accordance with the valid legal specifications.
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> 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
8
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3Specifications
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3.1. Use
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The testo 270 is a handy measuring instrument for fast testing of
cooking oils.
The TPM value (total polar materials) enables a statement on the
ageing of cooking oils due to the effects of heat.
The following measuring tasks can be performed with the testo
270:
• Displaying the temperature of the cooking oil:
Indicator for correct setting of the deep fat fryer, checking of
integrated temperature displays.
• Displaying the TPM value:
Indicator for the ageing of the cooking oil.
The sensor works on a capacitive basis and determines as the
reading the total polar materials as a %.
The free fatty acids, which are determined above all for the
evaluation of unloaded oils (rancidity), cannot be detected with the
testo 270.
The temperature of the cooking oil to be measured must be
at least 40 °C. The maximum operating temperature is
200 °C.
The sensor and the probe tube are designed to come into
contact with oil used in deep fat fryers for the typical
duration of a spot check measurement. The materials used
in these components meet the relevant requirements in the
Regulation (EC)1935/2004.
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3.2. Technical data
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Feature Values
Measuring range Temperature: 40.0 to 200.0 °C /
104.0 to 392.0°F
TPM: 0 to 40%
Accuracy Temperature: ± 1.5 °C
TPM2: ±2% (40.0 to 190.0 °C / 104 to 374 °F)
2typical, referred to internal reference, at an ambient temperature of 25 °C.

3 Specifications
9
Feature Values
Resolution Temperature: 0.1 °C / 0.1 °F
TPM: 0.5%
Power supply Batteries: 2x micro (type AAA)
Battery (micro AAA) Designation according to IEC: LR03
Chem. composition: Zn-MnO2 (alkaline)
Battery life at 20 °C Approx. 25 hrs continuous operation
(corresponds to 500 measurements) without
display illumination
Temperature
sensor
PTC
TPM sensor Capacitive sensor
Operating
temperature
0 to 50 °C / 32 to 122 °F
Ambient humidity 0 to 90%RH
Storage/transport
temperature
-20 to 70 °C / -4 to 158 °F
Display LCD, 2-line, display illumination
Weight 255 g
Housing material Top part: ABS
Lower part: ABS-PC glass fibre 10%
Dimensions Approx. 50 mm x 170 mm x 300 mm
(WxHxD)
TPM response time Approx. 30 secs
Protection class IP65
Warranty 24 months
EC Directive 2014/30/EC
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4 Product description
10
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4Product description
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4.1. Overview
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1 Display
2 Control keys
3 Battery compartment
4 Probe shaft
5 Oil quality (%TPM) and temperature sensor
6 Min. immersion depth
7 Max. immersion depth

4 Product description
11
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Items shown on the display:
Items shown Function/property
200 (flashing
temperature value
> 200 °C)
Temperature measuring range exceeded
40 (flashing
temperature value
< 40 °C)
Temperature measuring range undershot
Alarm Alarm indicator activated
PIN Configuration mode locked
Battery capacity 100 %
Battery capacity 66 %
Battery capacity 33 %
Battery capacity < 10 %
Alarm Upper TPM limit value exceeded
Alarm Lower TPM limit value exceeded
Hold Readings held (manually)
Auto-Hold Readings held (automatically)
°C / °F Temperature in °C or °F
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Important display messages
Item shown on the
display
Explanation
000 lights up Instrument is ready to measure, sensor is not
in oil.
Reading >190
flashes
Measured temperature is above 190 °C
(374 °F). The reading flashes in the range
from 190.1 °C (374 °F) to 200 °C (392 °F).
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Control keys
Buttons Function/property
[] • Switch instrument on/off
• Configure instrument

4 Product description
12
Buttons Function/property
[Hold] • Hold measuring values manually
• Switch to the measuring mode
• Configure instrument
[] • on/off;yes/no - Configure instrument
[] • on/off;yes/no - Configure instrument
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Battery compartment
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4.2. Basic properties
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Power supply
The power is supplied to the instrument via two micro batteries
(type AAA). The batteries are included in the delivery.
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5 First steps
13
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5First steps
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5.1. Commissioning
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Inserting batteries
CAUTION
Incorrectly inserted batteries can damage the instrument!
> Adhere to the polarity when inserting the batteries.
1. Undo the screw on the battery compartment.
2. Remove the battery holder.

5 First steps
14
3. Insert batteries. Adhere to the polarity.
4. Insert the battery holder into the battery compartment.
5. Secure battery compartment with screw.
6. Switch instrument on: Press [].
- Display test is carried out: all segments light up.
- The instrument switches to the measuring mode.
- 000 lights up on the display, the instrument is ready for use.
7. If necessary, switch instrument off.
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For storage of the instrument
Suspension attachment

5 First steps
15
> The integrated suspension attachment can be used to hang the
instrument on a hook.
Plastic case
- The instrument is securely stored in a plastic case for protection
against contamination and for transport.
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5.2. Getting to know the product
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5.2.1. Switching the instrument on/off
To switch on
> Press []until the indicator elements appear in the display.
- Display test is carried out: all segments light up.
- The instrument switches to the measuring mode and is ready
for operation.
To switch off
> Press and hold []for approx. 2 secs.
- Display goes off, instrument switches off.
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5.2.2. Description of important functions and displays
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5.2.2.1. Alarm indicator
The alarm indicator uses the following display colours to show what
range the measured TPM value is in:
Green TPM value < lower limit value
Yellow TPM value is between the lower and the upper limit value

5 First steps
16
Green TPM value < lower limit value
Red TPM value > upper limit value
The alarm indicator is switched on when the instrument is
delivered. The TPM limit values are set as follows (only for the
standard set, order no. 0563 2750):
Lower limit value 20%
Upper limit value 24%
To activate/deactivate the alarm indicator, see Configuring the
instrument, page 18.
To set the TPM limit values, see Setting the TPM limit values, page
16.
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5.2.2.2. Setting the TPM limit values
The TPM limit values can be between 0 and 40%. The
upper limit value (Alarm ) must be at least 1% higher than
the lower limit value (Alarm ).
In order to apply the settings of the lower and upper TPM
limit value, you must make sure you confirm the input of the
upper TPM limit value with [Hold].
Setting the lower TPM limit value
Requirement: Instrument is in configuration mode, See also
Carrying out the configuration, page 18.
1. Alarm and the set lower limit value appear on the display.
- When alarm indicator is activated: the display lights up yellow.
2. Set the lower limit value with []or [].
3. Confirm with [Hold].
- New lower limit value is applied.
- The instrument switches to the upper TPM limit value (Alarm ).
Setting the upper TPM limit value
Requirement: Instrument is in configuration mode,
lower TPM limit value has been set and confirmed with [Hold].
1. Alarm and the set upper limit value appear on the display.
- When alarm indicator is activated: the display lights up red.
2. Set the upper limit value with []or [].
3. Confirm with [Hold].

5 First steps
17
- New upper limit value is applied.
> Carry out further settings in the configuration menu or quit the
configuration menu with [].
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5.2.2.3. Hold function
Measured values can be held manually.
Requirement: Sensor is in the oil.
1. Briefly press [Hold] (< 1 sec).
- Hold appears in the display.
- Readings are held.
2. To switch to the measuring mode: Briefly press [Hold] (<
1 sec).
- Hold function is deactivated.
- Current readings are displayed.
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5.2.2.4. Auto-Hold function
When the Auto-Hold function is activated, the measured values
are automatically held by the instrument after the equalization
period.
To activate/deactivate the Auto-Hold function, see Carrying out the
configuration, page 18
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5.2.2.5. Auto-off function
When the Auto-off function is activated, the instrument
automatically switches off after a certain time
• If the instrument is in measuring mode: automatic switch-off
after 2 mins.
• If the instrument is in hold or configuration mode: automatic
switch-off after 10 mins.
To activate/deactivate the Auto-off function, see Configuring the
instrument, page 18
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5.2.2.6. Battery capacity
With decreasing battery capacity, a symbol lights up in the display (
). If the empty battery symbol ( ) flashes in the display, the
remaining capacity is only approx. 30 min.
If the battery voltage is too low, the instrument automatically
switches off.
> Change batteries, see Changing batteries, page 26

5 First steps
18
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5.2.3. Configuring the instrument
Setting options in the configuration mode
Configurations Setting options
Setting the TPM limit values
Alarm,Alarm
Lower TPM limit value Alarm
Upper TPM limit value Alarm
Carry out calibration
CAL
no: Do not carry out calibration.
yes: Carry out calibration.
Automatically hold readings
Auto-Hold
on: Readings are automatically
held by the instrument.
off: Readings are not
automatically held.
Automatically switch off the
instrument Auto-off
on: Instrument switches off
automatically after 2 or 10 mins.
off: No automatic switch-off.
Set alarm indicator
Alarm
on: Alarm indicator activated
off: Alarm indicator deactivated
Set temperature unit
°C, °F
°C or °F
Lock configuration, including
TPM limit values
PIN
no: Do not lock configuration.
yes: Lock configuration
Carry out reset
rst
no: Do not reset the adjustment
value to the factory setting.
yes: Reset the adjustment value
to the factory settings.
Firmware version Firmware versions of the product
components are shown.
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Carrying out the configuration
Requirement: The instrument is switched off.
1. Switch the instrument on.
> [Hold] hold down and press [].
- When the configuration menu is locked, PIN lights up.
> To unlock, set the last two figures of the serial number with [
]or [].

5 First steps
19
If an incorrect PIN is entered, the instrument switches into
measuring mode.
- When the configuration menu is not locked, you can gain
access by setting the limit values.
2. Set the alarm limit values.
- Alarm lights up in the display.
> Set lower limit value (Alarm ): []or []and confirm with
[Hold].
- Alarm lights up in the display.
> Set upper limit value (Alarm ): []or []and confirm with
[Hold].
3. Carry out / do not carry out calibration.
- CAL and no or yes light up in the display.
> Activate / deactivate calibration / adjustment function (no is
the standard setting): []or []and confirm with [Hold].
- Selection of yes: The instrument can be calibrated /
adjusted, see Calibrating/adjusting the instrument, page 27
- Selection of no: No calibration / adjustment possible
4. Automatically hold readings.
- Auto-Hold and on or off light up in the display.
> Switch Auto-Hold on or off: []or []and confirm with
[Hold].
5. Automatically switch the instrument off.
- Auto-off and on or off light up in the display.
> Switch Auto-off on or off: []or []and confirm with
[Hold].
6. Set alarm indicator
- Alarm and on or off light up in the display.
> Switch alarm indicator on or off: []or []and confirm with
[Hold].
7. Set the temperature unit.
- °C or °F lights up in the display.
> Set the temperature unit (°C/°F): []or []and confirm
with [Hold].
8. Enable / disable PIN.
- PIN and yes or no light up in the display.
> Activate PIN (yes) or deactivate it (no is the standard
setting).
9. Carry out reset.
- rst and yes or no light up.

5 First steps
20
> Activate or deactivate rst: []or [].
- Selection of yes: Delete adjustment value, is reset to the
factory setting.)
- Selection of no: no reset, adjustment value is retained).
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Quitting configuration mode early and saving
You can quit the configuration mode early.
The configuration mode cannot be stopped in the
adjustment / calibration process.
> Quit configuration mode early: Press and hold []for approx.
1 sec.
- Configuration mode is stopped.
- The values which have so far been set and confirmed with
[Hold] are applied.
- The instrument switches to the measuring mode.
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5.2.4. Locking / unlocking configurations
You can lock/unlock the set values, including TPM limit values,
from the configuration mode. The instrument is delivered with the
configuration mode unlocked (PIN is deactivated, no).
Requirements: Instrument is in configuration mode.
> Go through the configuration mode with [Hold], until PIN
and yes or no light up in the display.
Lock configuration mode
> Activate PIN: Select yes with []or [].
- PIN is activated and the configuration mode is locked.
The last two figures of the instrument's serial number are
automatically set as the PIN (see sticker on the instrument).
Unlock configuration mode
Requirement: PIN is activated and the instrument is in configuration
mode.
Enter PIN:
> Select first figure: []or []and confirm with [Hold].
> Select second figure: []or []and confirm with [Hold].