TESTO 926 User manual

Instruction manual
Content
General notes ....................................................22
1. Safety advice......................................................23
2. Intended purpose ..............................................24
3. Product description............................................25
3.1 Display and control elements ........................................25
3.2 Interfaces ......................................................................26
3.3 Voltage supply ..............................................................26
4. Commissioning ..................................................27
5. Operation ..........................................................28
5.1 Connect the probe........................................................28
5.2 Switching the instrument on / off ..................................28
5.3 Switching the display light on / off ................................29
5.4 Performing settings ......................................................29
6. Measuring ..........................................................34
7. Care and maintenance ......................................36
8. Questions and answers......................................37
9. Technical data ....................................................38
10. Accessories / Spare parts ..................................39
testo 926
Temperature measuring instrument
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

22
General notes
This chapter provides important advice on using this
documentation.
The documentation contains information that must be
applied if the product is to be used safely and efficiently.
Please read this documentation through carefully and
familiarise yourself with the operation of the product before
putting it to use. Keep this document to hand so that you
can refer to it when necessary.
Identification
Representation Meaning Comments
Note Offers helpful tips and information.
±, 1, 2 Objective Denotes the objective that is to be
achieved via the steps described. Where
steps are numbered, you must always
follow the order given!
Condition A condition that must be met if an action
is to be carried out as described.
i, 1, 2, ... Step Carry out steps. Where steps are
numbered, you must always follow the
order given!
Text Display text Text appears on the instrument display.
Control button Press the button.
- Result Denotes the result of a previous step.
ºCross-reference Refers to more extensive or detailed
information.
Button
General notes

23
1. Safety advice
This chapter gives the general rules which must be
followed and observed if the product is to be handled
safely.
Avoid personal injury/damage to equipment
iDo not use the instrument and probes to measure on or
near live parts.
iNever store the instrument/probes together with
solvents and do not use any dessicants.
Product safety/preserving warranty claims
iOperate the instrument only within the parameters
specified in the Technical data.
iAlways use the instrument properly and for its intended
purpose. Do not use force.
iDo not expose handles and feed lines to temperatures in
excess of 70 °C unless they are expressly permitted for
higher temperatures.
Temperatures given on probes/sensors relate only to the
measuring range of the sensors.
iOpen the instrument only when this is expressly
described in the documentation for maintenance and
repair purposes.
Carry out only the maintenance and repair work that is
described in the documentation. Follow the prescribed
steps when doing so. For safety reasons, use only
original spare parts from Testo.
Ensure correct disposal
iTake faulty rechargeable batteries/spent batteries to the
collection points provided for them.
iSend the product back to Testo at the end of its useful
life. We will ensure that it is disposed of in an
environmentally friendly manner.
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1. Safety advice

24
2. Intended purpose
This chapter gives the areas of application for which the
product is intended.
Use the product only for those applications for which it was
designed. Ask Testo if you are in any doubt.
testo 926 is a compact measuring instrument for
measuring temperatures.
The product was designed for the following
tasks/applications:
· Food industry
· Laboratories
The product should not be used in the following areas:
· Areas at risk of explosion
· Diagnostic measurements for medical purposes
2. Intended purpose

25
3. Product description
This chapter provides an overview of the components of
the product and their functions.
3.1 Display and control
elements
Overview
Infrared interface, probe socket(s)
Display
Control buttons
Radio module compartment, battery
compartment (rear)
Key functions
Key Functions
Switch instrument on;
switch instrument off (press and hold)
Switch display light on / off
Keep reading, display
maximum/minimum value
Open/leave configuration mode (press
and hold)
In configuration mode:
Confirm input
In configuration mode:
Select option, increase value (press and
hold to increase values rapidly)
Print data
Change between displaying connected
probe and radio probe ( lit)
In configuration mode: Select option,
decrease value (press and hold to
decrease values rapidly)
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3. Product description

26
Important displays
Display Meaning
Battery capacity (bottom left in display):
4 segments in the battery symbol are lit: Instrument battery is fully
charged
· No segments in the battery symbol are lit: Battery is almost spent
Print function: Readings are sent to the printer
Upper alarm limit: Lit if exceeded
Lower alarm limit: Lit if undershot
Measurement channel: Radio probe (the number of “radio wave”
segments shown indicates the strength of the signal)
3.2 Interfaces
Infrared interface
Measurement data can be sent to a Testo printer via the
infrared interface on the head of the instrument.
Sensor socket(s)
Plug-in measuring probes can be connected via the probe
socket(s) on the head of the instrument.
Radio module (accessory part)
Radio probes may only be used in countries in which
they have been Type Approved (see application infor-
mation of the radio probe).
A radio measuring probe can be connected via the radio
module.
3.3 Voltage supply
Voltage is supplied by means of a 9 V monobloc battery
(included in delivery) or rechargeable battery. It is not
possible to run the instrument from the mains supply or
charge a rechargeable battery in the instrument.
3. Product description

27
4. Commissioning
This chapter describes the steps required to commission
the product.
²Removing tthe pprotective ffilm oontthe ddisplay:
iPull the protective film off carefully.
²Inserting aabbattery/rechargeable bbattery:
1To open the battery compartment on the rear of the
instrument, push the lid of the battery compartment in
the direction of the arrow and remove.
2Insert a battery/rechargeable battery (9 V monobloc).
Observe the polarity!
3To close the battery compartment, replace the lid of
the battery compartment and push it against the
direction of the arrow.
- The instrument switches itself on and configuration
mode is opened.
4Set the date, time and unit of measurement.
ºSee the chapter PERFORMING SETTINGS, objectives
SETTING THE DATE/TIME and following.
²Inserting aarradio mmodule ((accessory ppart):
Radio probes may only be used in countries in which
they have been Type Approved (see application infor-
mation of the radio probe).
The instrument is switched off.
1To open the radio module compartment on the rear of
the instrument, push the clip lock downwards and
remove the lid of the radio module compartment.
2Insert the radio module.
3To close the radio module compartment, replace the
radio module compartment and close it.
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4. Commissioning

28
5. Operation
This chapter describes the steps that have to be executed
frequently when using the product.
5.1 Connect the probe
Plug-in probes
Plug-in probes must be connected before the measuring
instrument is switched on so that they are recognised by
the instrument.
iInsert the connector of the probe into the probe
socket.
Radio probes
Radio probes may only be used in countries in which
they have been Type Approved (see application infor-
mation of the radio probe).
A radio module (accessory part) is required for the use of
radio probes. The radio module must be connected before
the measuring instrument is switched on so that it is
recognised by the instrument.
Each radio probe has a probe ID (identification number).
This must be set in configuration mode.
ºSee the chapter PERFORMING SETTINGS.
5.2 Switching the instrument
on / off
²Switching tthe iinstrument oon:
iPress .
- Measurement view is opened: The current reading
is displayed, or ---- lights up if no reading is
available.
5. Operation

29
²Switching tthe iinstrument ooff:
iPress and hold (for approx. 2s) until the display
goes out
5.3 Switching the display
light on / off
²Switching tthe ddisplay llight oon / off:
The instrument is switched on.
iPress .
5.4 Performing settings
1To oopen cconfiguration mmode:
The instrument is switched on and is in measurement
view. Hold, Max or Min are not activated.
iPress and hold (for approx. 2s) until the display
changes.
You can change to the next function with .
You can leave configuration mode at any time. To do
so, press and hold (for approx. 2s) until the
instrument has changed to measurement view. Any
changes that have already been made in configuration
mode will be saved.
2To sset tthe aalarm ffunction:
Configuration mode is opened, Alarm is displayed.
1Select the desired option with and confirm with
:
·OFF: Switches the alarm function off.
·On: Switches the alarm function on.
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5. Operation

30
OFF was selected:
ºContinue with objective TO REGISTER THE RADIO PROBE.
On was selected:
2Use / to set the value for the upper alarm
threshold ( ) and confirm with .
3Use / to set the value for the lower alarm
threshold ( ) and confirm with .
3To rregister tthe rradio pprobe:
Radio probes may only be used in countries in which
they have been Type Approved (see application infor-
mation of the radio probe).
The setting function for radio probes is only available if
a radio module (accessory part) is inserted into the
measuring instrument.
ºSee the chapter COMMISSIONING.
If no radio module is inserted:
ºContinue with objective TO SET AUTO OFF.
Each radio probe has a probe ID (RF ID). This consists of
the last 3 digits of the serial no. and the position of the
slide switch in the radio probe (Hor L).
Configuration mode is opened and RF ID and Auto are
lit.
The radio probe is switched on and the transfer rate is
set to 2 readings per second (see application infor-
mation of the radio probe).
1Select the desired option with and confirm with
:
·YES: Switches automatic probe detection on
(recommended).
·no: Switches automatic probe detection off.
no was selected:
2Use / to set the probe ID manually and
confirm with .
5. Operation