testo 174 Mini Temperature Data Loggers Instruction Manual

: June 13, 2024
: testo

Table of Contents

testo 174 Mini Temperature Data Loggers
Product Information
Product Usage Instructions
Safety and the environment
Specifications
First steps
Using the product
Maintaining the product
Tips and assistance
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

testo 174 Mini Temperature Data Loggers

Product Information

The product is a data logger called testo 174. It is used to store and retrieve individual measurement values and measurement series.
The testo 174 comes in two variants : testo 174T and testo 174H. The testo 174T variant features an internal NTC temperature sensor, while the testo 174H variant features an internal NTC temperature sensor and a capacitive humidity sensor. Both variants have different measurement ranges and accuracies for temperature and humidity.
The testo 174 data loggers are powered by two 3V button cells (CR 2032 Lithium) and have a long battery life. They have different IP ratings for protection against dust and water. The testo 174T has an IP65 rating, while the testo 174H has an IP20 rating. Both variants have a large memory capacity to store measurement values.

The data loggers can be used with Windows XP, Vista, and Win7 operating systems, and come with a warranty of 24 months.

Product Usage Instructions

To use the testo 174 data logger, follow these steps

Program the data logger by following the instructions provided in the user manual.
Mount the wall bracket to securely mount the data logger.
To retrieve the stored data, follow the instructions for data retrieval provided in the user manual.

Ensure to adhere to the safety precautions mentioned in the user manual to ensure safe usage of the product.

Safety and the environment

About this document

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.

Symbols and writing standards

Representation	Explanation
****	Warning advice, risk level according to the signal word:

Warning! Serious physical injury may occur.

Caution! Slight physical injury or damage to the equipment may occur.

Implement the specified precautionary measures.

| 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.
Menu| Elements of the instrument, the instrument display or the program interface.
[OK]| Control keys of the instrument or buttons of the program interface.
… | …| Functions/paths within a menu.
“…”| Example entries

Ensure safety

Only operate the product properly, for its intended purpose and within the parameters specified in the technical data. Do not use any force.
Never use the instrument to measure on or near live parts.
Keep the read-out contacts on the rear of the data logger in particular away from live parts!
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.

Protecting the environment

Dispose of faulty rechargeable batteries/spent batteries in accordance with the valid legal specifications.|
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.

Specifications

Use
The testo 174 data loggers are used for storing and reading out individual readings and series of measurements.
Readings are measured and stored with the testo 174 and transmitted to the PC via the interface, where they can be read out and evaluated using the testo ComSoft software. The data logger can also be programmed individually via the software.

Examples of applications
testo 174T is ideally suited for temperature measurement in in refrigerators, freezers, cold rooms and cold shelves.
testo 174H monitors the climatic conditions, e.g. in warehouses, offices and in the manufacturing sector.

Technical data

Characteristic	Values
Probe type	Internal NTC temperature sensor
Measuring range	-30 to +70 °C
Accuracy	± 0.5 °C (-30 to +70 °C)
Resolution	0.1 °C
Operating temperature	-30 to +70 °C
Storage temperature	-40 to +70 °C
Battery type	2 x 3 V button cell (2 x CR 2032 lithium)
Life	500 days (15 min measuring cycle, +25 °C)
Protection class	IP65
Meas. cycle	1 min – 24 h (can be selected)
Memory	16,000 readings
Characteristic	Values
---	---
Software	can be used with Windows XP, Vista, Win7
Standards	2004/108/EC, complies with the directives in accordance with the

standard EN 128303
Warranty| 24 months, warranty conditions : see website www.testo.com/warranty

testo 174H

Characteristic	Values
Probe type	NTC temperature sensor and internal capacitive humidity sensor
Measuring range	0 to 100 % RH (not for condensing atmosphere4), -20 to +70 °C
Humidity accuracy	± 3 % RH (2 % RH to 98 % RH) at +25 °C

± 0.03 % RH/K ± 1 digit

Please note that with this instrument in accordance with EN 12830 a regular inspection and calibration as per EN 13486 must be performed ( recommendation : annually). Contact us for more information.
For continous applications in high humidity (> 80% RH at ≤ 30°C for > 12 h, > 60% RH at > 30°C for > 12 h), please contact us via www.testo.com/service-contact.

Characteristic	Values
Warranty	24 months, warranty conditions : see website

www.testo.com/warranty
EC Directive| 2004/108/EC

First steps

Releasing/securing data logger

The data logger is delivered secured.

Releasing data logger

Push both locks on the bottom of the wall bracket outwards.
Slide data logger out of the wall bracket.

Securing data logger

Slide data logger into the wall bracket.
Push both locks on the bottom of the wall bracket inwards.

Inserting batteries

Place the data logger on its front.
Open battery compartment cover on the rear of the data logger by turning to the left and remove it.
Use a coin for this.
Insert supplied batteries (3 V button cell, CR 2032 lithium) so that the + pole is always visible.
Place battery compartment cover on the data logger and close by turning to the right.

Use a coin for this.

The current temperature is shown on the display screen.

Connecting data logger to PC

Install testo ComSoft software.
The software is available in the Internet as a free download requiring registration : www.testo.com/download-center.
The instructions for the installation and operation of the software can be found in the testo ComSoft instruction manual that is downloaded together with the software.
The software can be ordered on CD (article no. 0572 0580) if the download from the Internet is not desired.
Connect the connecting cable of the interface to a free USB interface on the PC.
Slide the data logger into the bracket of the interface.
Configure data logger, see separate testo ComSoft instruction manual.

Display and control elements
Display
Depending on the operating status, various information may be shown in the display. A detailed depiction of the information that can be called up can be found in the quick instruction manual that is included with every data logger.

Measurement program running
Measurement program over
Wait for start of measurement program
Highest saved reading
Lowest saved reading
Reading
Units
Start criterion Date/time programmed
Battery capacity
Lower alarm value
- Flashes: programmed alarm value is shown
- Lights up: programmed alarm value was undershot
Upper alarm value
- Flashes: programmed alarm value is shown
- Lights up : programmed alarm value was exceeded

The display speed of liquid crystal displays slows down at temperatures below 0 °C (approx. 2 seconds at -10 °C, approx. 6 seconds at -20 °C) for technical reasons. This does not influence the measuring accuracy.

Key functions

✓ Operating status Wait and start criterion Button start programmed.
Press and hold GO button approx. 3 seconds to start the measurement program.
– The measurement program starts and Rec appears in the display.
✓ Operating status Wait
Press GO button in order to change between displays of the upper alarm value, lower alarm value, battery life and last reading.
– These are shown in the specified sequence in the display.
✓ Operating status Rec or End
Press GO button in order to change between displays of the highest saved reading, lowest saved reading, upper alarm value, lower alarm value, battery life and last reading.
– These are shown in the specified sequence in the display.

Using the product

Programming data logger
In order to adapt the programming of your data logger to your individual requirements, you require the testo ComSoft software. It is available in the Internet as a free download requiring registration www.testo.com/download- center.
The instructions for the installation and operation of the software can be found in the testo ComSoft instruction manual that is downloaded together with the software.

Mounting wall bracket
Mounting materials (e.g. screws, anchor plugs) are not included in the delivery.

Data logger is removed from the wall bracket (see Releasing/securing data logger page 24).

Position wall bracket at the desired location.
Using a pen or similar, mark the location for the fastening screw.
Prepare the fastening location for the attachment in accordance with the material (e.g. drill hole, insert anchor plug).
Fasten wall bracket using an appropriate screw.

Reading out data
The data logger is read out and the read-out data are processed further by means of the testo ComSoft software, see separate instruction manual.

Maintaining the product

Changing the batteries

The running measurement program is stopped when the battery is changed. The stored data are preserved, however.

Read out stored data, see testo ComSoft software instruction manual.
✓ If it is no longer possible to read out the stored data because the battery capacity is too low

Change batteries and then read out the stored data.
Place the data logger on its front.
Open battery cover on the rear of the data logger by turning to the left. Use a coin for this.
Remove empty batteries from the battery compartment.
Insert two new batteries (3 V button cells, CR 2032 lithium) into the instrument so that the + pole is always visible. Only use new branded batteries. If a partially used battery is inserted, the calculation of the battery capacity is not performed correctly.
Place battery compartment cover on the battery compartment and close by turning to the right. Use a coin for this. – The current reading is shown on the display.
The data logger must be reconfigured. To do so, the testo ComSoft software must be installed on the computer and a connection to the data logger must be set up (see Connecting data logger to PC page 26).
Slide the data logger into the bracket of the interface.
Start testo ComSoft software and create a connection to the data logger.
Reconfigure data logger or install the old stored configuration, see separate testo ComSoft instruction manual.
- The data logger is once again ready for use.

Cleaning the instrument

CAUTION
Damage to the sensor!

Ensure that no liquid enters the inside of the housing.
If the housing of the instrument is dirty, clean it with a damp cloth.
Do not use any aggressive cleaning agents or solvents! Weak household cleaning agents or soap suds can be used.

Tips and assistance

Questions and answers

Question	Possible causes/solution

– – – –

lights up in the display *

| The sensor of the data logger is defective.

Contact your dealer or Testo Customer Service.

This is also shown in the display if a new measurement program is transferred from the PC to the data logger. It goes out again after approx. 8 seconds. In this case, there is no error!
If you have any questions, please contact your dealer or Testo Customer Service. The contact details can be found on the back of this document or on the Internet at www.testo.com/service-contact.

Accessories and spare parts

Description	Article no.

testo 174H mini data logger, 2-channel, incl. wall bracket, battery (2 x CR 2032 lithium) and calibration protocol| 0572 6560
testo 174T mini data logger, 1-channel, incl. wall bracket, battery (2 x CR 2032 lithium) and calibration protocol| 0572 1560
USB interface for programming and reading out testo 174T and testo 174H loggers| 0572 0500
testo ComSoft CD (if free download requiring registration from website is not desired)| 0572 0580
Battery, 3 V button cell (CR 2032 lithium), please order 2 batteries per logger| 0515 0028
ISO calibration certificate humidity, calibration points 11.3 % RH; 50.0 % RH; 75.3 % RH at

+25 °C/+77 °F; per channel/instrument

| 0520 0176
ISO calibration certificate temperature, calibration points -18 °C; 0 °C; +60 °C; per channel/instrument| 0520 0151