TESTO 926 - User Manual

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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

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Summary

Safety Advice

Personal Injury and Equipment Damage Prevention

Rules to prevent harm to users and the device.

Product Safety and Warranty Preservation

Guidelines for safe operation and maintaining warranty.

Commissioning

Battery;Rechargeable Battery Insertion

Step-by-step guide for inserting batteries.

Operation

Connecting the Probe

How to connect plug-in and radio probes.

Instrument Power On;Off

Instructions for powering the instrument on and off.

Performing Settings

Guide to accessing and changing instrument settings.

Registering the Radio Probe

Process for registering radio probes with the instrument.

Measuring

Taking a Measurement

Steps to perform a temperature measurement.

Auto Hold Function During Measurement

Alarm Function During Measurement

Care and Maintenance

Battery Replacement

Steps to replace the instrument's battery.

The Testo 926 is a compact temperature measuring instrument designed for various applications, particularly in the food industry and laboratories. It is not intended for use in areas at risk of explosion or for diagnostic measurements for medical purposes. The device features an infrared interface for data transfer to a Testo printer, one or more sensor sockets for plug-in measuring probes, and a compartment for an optional radio module to connect radio probes.

Function Description

The Testo 926 measures temperature using connected probes. It can display current readings, as well as maximum and minimum values recorded since the instrument was last switched on. The device supports both plug-in probes and radio probes (with an optional radio module). When using radio probes, the instrument can automatically detect them or allow manual entry of the probe ID.

The instrument includes several key functions accessible via its control buttons:

Power On/Off: Switches the instrument on or off (by pressing and holding).
Display Light: Toggles the display backlight.
Hold/Max/Min: Keeps the current reading, or displays the maximum/minimum values.
Configuration Mode: Opens or exits configuration mode (by pressing and holding). In configuration mode, it confirms input, selects options, and increases values.
Print Data: Sends data to a connected Testo printer.
Channel Switch: Changes between displaying readings from connected plug-in probes and radio probes.
Value Adjustment: In configuration mode, selects options and decreases values.

The device also features an alarm function that can be set with upper and lower thresholds. If a measured temperature exceeds or falls below these limits, an alarm light illuminates, and a signal tone is given. The Auto Hold function, active only for plug-in probes, automatically records a stable reading when the change in reading is less than 0.2 °C/0.4 °F within a set evaluation time.

Important Technical Specifications

Parameters: Temperature (°C/°F).
Measuring Range: -50.0 to +400 °C / -58.0 to +752.0 °F.
Resolution:
- 0.1 °C / 0.1 °F for -50.0 to +199.9 °C / -58.0 to +391.8 °F.
- 1 °C / 1 °F for the rest of the range.
Accuracy:
- ±0.3 °C / ±0.6 °F for -20.0 to +70.0 °C / -4.0 to +158.0 °F.
- ±0.7 °C + 5% o.r. / ±1.3 °F + 5% o.r. for the rest of the range.
Probe Connections: 1x Omega TC socket for temperature probe type T (Cu-CuNi), and an optional radio module.
Measuring Rate: 2 readings per second.
Operating Temperature Range: -20 to +50 °C / -4 to +122 °F.
Storage Temperature: -40 to +70 °C / -40 to +158 °F.
Voltage Supply: 1x 9 V monobloc battery/rechargeable battery.
Running Time:
- With probe connected: approx. 200h (display light off) / approx. 68h (display light on).
- With radio probe: approx. 45h (display light off) / approx. 33h (display light on).
Protection Class: IP65 with TopSafe (accessory part) and probe connected.
EC Directive: 89/336/EEC.
Warranty: 2 years.

Usage Features

The Testo 926 is designed for straightforward operation.

Connecting Probes: Plug-in probes must be connected before switching on the instrument for recognition. Radio probes require an optional radio module to be connected before the instrument is powered on. Each radio probe has a unique ID that needs to be configured in the instrument.
Switching On/Off: A short press of the power button turns the instrument on, opening the measurement view. Pressing and holding the power button for approximately 2 seconds turns it off.
Display Light: The display light can be switched on or off with a dedicated button.
Configuration Settings: The instrument allows users to set various parameters, including the alarm function (on/off, upper/lower thresholds), registration of radio probes (automatic or manual ID entry), Auto Off function (switches off after 10 minutes of inactivity), Auto Hold function (for automatic recording of stable readings), Max./Min. print function (includes max/min values in printouts), date/time, and unit of measurement (°C or °F). The instrument can also be reset to factory settings, though radio probe IDs are not reset.
Taking Measurements: Once a probe is in position, readings can be taken directly from the display. If the alarm function is active, an alarm will sound and light up if thresholds are exceeded.
Displaying Max/Min Values: Users can cycle through recorded, maximum, minimum, and current readings using the Hold/Max/Min button. The 2nd reading line always shows the current reading. Maximum/minimum values can be reset to the current reading.
Printing Readings: The instrument can print current, recorded, or max/min readings to a Testo printer (accessory). The Max./Min. print function can be configured to include these values in printouts.

Maintenance Features

Maintaining the Testo 926 is simple and focuses on ensuring its longevity and accuracy.

Cleaning: The housing can be cleaned with a moist cloth and soap suds. Aggressive cleaning agents or solvents should be avoided.
Battery Replacement: The instrument uses a 9 V monobloc battery or rechargeable battery. To replace it, the battery compartment lid on the rear of the instrument is pushed in the direction of the arrow and removed. After inserting a new battery, observing polarity, the lid is replaced. If the power supply has been interrupted for a long time, the date, time, and unit of measurement will need to be reset.
Troubleshooting: The manual provides a troubleshooting section for common issues such as low battery, sensor not plugged in, sensor break, or radio probe not found, offering possible causes and solutions. For more complex issues, users are advised to contact their dealer or Testo Customer Service.
Disposal: Faulty rechargeable batteries/spent batteries should be taken to designated collection points. At the end of its useful life, the product should be returned to Testo for environmentally friendly disposal.