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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 781-665-1400

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.

deenfresitptsvnl????

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.

deenfresitptsvnl????

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