TESTO 112 Bedienungsanleitung

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Instruction manual en

testo 112

NTC-/Pt100 measuring instrument

Contents

General notes ......................................................2

1. Safety advice........................................................3

2. Intended purpose ................................................4

3. Product description ..............................................5

3.1 Display and control elements ..........................................5

3.2 Interfaces ........................................................................6

3.3 Voltage supply ................................................................6

4. Commissioning ....................................................7

5. Operation ............................................................8

5.1 Connecting a probe ........................................................8

5.2 Switching the instrument on / off ....................................8

5.3 Switching the display light on / off ..................................9

5.4 Performing settings ........................................................9

6. Measuring ..........................................................12

7. Care and maintenance ......................................14

8. Questions and answers......................................15

9. Technical data ....................................................16

10. Accessories/spare parts ....................................17

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General notes2

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

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1. Safety advice 3

1. Safety advice

This chapter gives 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 measuring instrument and probes to

measure on or near live parts.

iNever store the measuring instrument/probes together

with solvents and do not use any desiccants.

Product safety/preserving warranty claims

iOperate the measuring instrument only within the

parameters specified in the Technical data.

iAlways use the measuring 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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2. Intended purpose4

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 112 is a compact, accurate measuring instrument for

measuring temperatures by means of plug-in temperature

probes. Thanks to the possibility of connecting not only

NTC probes, but also Pt100 probes, the testo 112 covers

a wide measurement range and at the same time provides

a high level of measurement accuracy.

The following components of the product are designed for continuous

contact with foodstuffs in accordance with the regulation

(EC) 1935/2004:

The measurement probe up to 1 cm before the probe handle or the

plastic housing. If provided, the information about penetration depths

in the instruction manual or the mark(s) on the measurement probes

should be noted.

The product was designed for the following

tasks/applications:

· Food sector

· Laboratories

· Applications requiring official calibration (only relevant for

Germany):

The testo 112 is approved for official calibration by the

Physikalisch-Technisches Institut PTB (national

metrology institute in Germany).

Approval mark:

The product should not be used in the following areas:

· Areas at risk of explosion

· Diagnostic measurements for medical purposes

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3. Produktbeschreibung 5

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

Display

Control buttons

Battery compartment (rear)

Button functions

Button 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:

Increase value, select option

In configuration mode:

Reduce value, select option

Print data

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3. Production description6

Important displays

Display Meaning

Battery capacity (bottom right 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

3.2 Interfaces

Infrared interface

Measurement data can be sent to a Testo printer via the

infrared interface on the head of the instrument.

Probe socket

A plug-in measuring probe can be connected via the probe

socket on the head of the instrument.

3.3 Voltage supply

Voltage is supplied by means of a 9V 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.

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4. Commissioning 7

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 it.

2Insert a battery/rechargeable battery (9V monobloc).

Observe the polarity!

3To close the battery compartment, replace the lid of

the battery compartment in position and push it

against the direction of the arrow.

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5. Operation8

5. Operation

This chapter describes the steps that have to be executed

frequently when using the product.

5.1 Connecting a 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.

5.2 Switching the instrument

on / off

²Switching tthe iinstrument oon:

iPress .

- A segment test is carried out: All LCD-segments in

the display briefly light up.

- A function test of the instrument and the probe is

carried out. The instrument tests the entire

measurement channel regarding the adherence to

allowed margins of error.

The type of probe attached is displayed for

approx.2s (NTC or Pt 100).

An error is detected:

-rEF Error is displayed for approx. 2s, then ----- is

displayed. Please contact your dealer or Testo

customer service.

The function test was successful:

- Measurement view is opened: The current reading

is displayed.

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5. Operation 9

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.

- The instrument is now in configuration mode.

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 lit.

1Select the desired option with /and confirm

with :

·oFF: Switches the alarm function off.

·on: Switches the alarm function on.

oFF was selected:

ºContinue with objective TO SET THE MAX./MIN. PRINT

FUNCTION.

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5. Operation10

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 sset tthe mmax./min. pprint ffunction:

Configuration mode is opened, MaxMin is flashing.

iSelect the desired option with /and confirm

with :

·on: Maximum and minimum values are printed out

as well when current or recorded readings are

printed.

· oFF: Maximum and minimum values are not printed

out as well when current or recorded readings are

printed.

4To sset AAuto OOff:

Configuration mode is opened, AutoOff is flashing.

iSelect the desired option with /and confirm

with :

·on: The measuring instrument switches off

automatically if no button is pressed for 10min (Hold

or Auto Hold is lit).

· oFF: The measuring instrument does not switch

itself off automatically.

5To sset tthe ddate/time:

Configuration mode is opened, YEAR is lit.

1Use / to set the current YEAR and confirm

with .

2Use / to set the other values for the month

(MONTH), day (DAY) and time (TIME) and confirm each

one with .

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