TESTO 112 Instruction Manual

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.

º Cross-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

i Do not use the measuring instrument and probes to

measure on or near live parts.

i Never store the measuring instrument/probes together

with solvents and do not use any desiccants.

Product safety/preserving warranty claims

i Operate the measuring instrument only within the

parameters specified in the Technical data.

i Always use the measuring instrument properly and for its

intended purpose. Do not use force.

i Do 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.

i Open 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

i Take faulty rechargeable batteries/spent batteries to the

collection points provided for them.

i Send 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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