What does 'Periodical check time exceeded' mean on Tuttnauer 5050 Laboratory Equipment?
- YYolanda RodgersAug 26, 2025
If your Tuttnauer Laboratory Equipment displays 'Periodical check time exceeded - Please call for service', call for service.



What does 'Periodical check time exceeded' mean on Tuttnauer 5050 Laboratory Equipment?
If your Tuttnauer Laboratory Equipment displays 'Periodical check time exceeded - Please call for service', call for service.
What does Pressure Time Error mean on Tuttnauer 5050 and how to solve it?
The 'Pressure Time Error' message on your Tuttnauer Laboratory Equipment means that the system cannot reach the required pressure conditions in the chamber, after preset time, during the air removal stage. Verify that the autoclave is not overloaded.
What to do if Tuttnauer 5050 Laboratory Equipment displays ‘High Temp’?
If the Tuttnauer Laboratory Equipment displays ‘High Temp’, clean the water level electrode inside the vessel and check the leveling of the machine.
Why does the safety relief valve on my Tuttnauer Laboratory Equipment open at a pressure higher than specified?
If the safety relief valve on your Tuttnauer Laboratory Equipment opens at a pressure higher (more than 10%) than specified, the relief valve is likely faulty and needs replacement.
What to do if the chamber pressure is not in range in Tuttnauer Laboratory Equipment?
If the chamber pressure of your Tuttnauer Laboratory Equipment is not within the normal range, wait until the chamber reaches the normal range pressure.
What does Canceled By User mean on Tuttnauer 5050 Laboratory Equipment and how to solve it?
If your Tuttnauer Laboratory Equipment displays 'Canceled By User', wait until 'cycle failed – canceled by user' or 'cycle end – canceled by user' is displayed. Then, perform a new cycle.
What to do if 'Jacket is cool' on Tuttnauer 5050?
If your Tuttnauer Laboratory Equipment indicates that the 'Jacket is cool,' wait until the jacket warms up.
What to do if my Tuttnauer Steriliser displays 'Low Pressure'?
If the Tuttnauer Steriliser displays 'Low Pressure', it means the chamber pressure dropped below the sterilization pressure (134°C = 304 kPa, 121°C = 205 kPa) for 2 seconds during the sterilization stage. To solve this, perform a new cycle.
What does 'Low Pressure' mean on my Tuttnauer 5050 and how do I fix it?
If your Tuttnauer Laboratory Equipment displays a 'Low Pressure' message, it indicates that the chamber pressure dropped below the sterilization pressure (134°C = 304 kPa, 121°C = 205 kPa) for 2 seconds during the sterilization stage. This can also be caused by leaking solenoid valves. First, perform a new cycle. If the problem continues, clean or replace the faulty solenoid valves.
What does 'High Pressure' mean on my Tuttnauer 5050 Laboratory Equipment and how do I resolve it?
If your Tuttnauer Laboratory Equipment displays a 'High Pressure' message, it means the chamber pressure rose 4.2 psi-29 kPa above the sterilization pressure (134°C = 304 kPa, 121°C = 205 kPa) for 2 seconds during the sterilization stage. This can be due to the heating element working continuously or the system not being calibrated. First, perform a new cycle. If the problem persists, the solid-state relay may be faulty, or the system may need calibration.
Overview of the laboratory sterilizer, its models, and features.
Procedures for unpacking and inspecting the autoclave upon receipt.
Details of the product warranty, coverage, and exclusions.
Information on warranty registration and technical service contact.
Lists relevant directives and standards the autoclave complies with.
Details water quality requirements and system utilities.
Covers electrical configurations, operating conditions, and performance.
Includes construction materials, emissions, and dimensions.
Provides detailed model specifications and sticker descriptions.
Diagrams showing the front and rear views of the autoclave.
Diagram of the control panel and its numbered components.
Explains the functions of the UP, DOWN, and START/STOP keys.
Lists and explains operational and error messages and symbols.
Describes the optional printer and its role in the system.
Details the Glass sterilization program parameters and sequence.
Details the Plastic sterilization program parameters and sequence.
Details the Liquid A sterilization program, cautions, and sequence.
Details the Liquid B – Waste sterilization program, cautions, and sequence.
Details the Liquid A – Cooling program parameters and sequence.
Details the Liquid B – Waste Cooling program parameters and sequence.
Details the Bio Hazard 1 program for bio-hazard models.
Details the Bio Hazard 2 program for bio-hazard models.
Details the Bio Hazard Liquids program for bio-hazard models.
Details the Vacuum Test program for PV models.
Details the Warm-Up program for pre-warming the chamber.
Details the Isothermal program for liquids, agar, pasteurization.
Details the Air Mixture program for liquids in soft packages.
Details the Glass Test program for checking bottle durability.
Details the Durham program for liquids.
Illustrates screens shown after a successful sterilization cycle.
Shows screens for cycles aborted after sterilization.
Illustrates screens indicating a general cycle failure.
Instructions for browsing menus and changing parameters.
Accessing quick options, setting date/time, and system parameters.
Details on managing cycle parameters like Dry Time.
Information on printer output content and paper handling.
Guidelines for treating thermal papers and powering off the printer.
Guidelines for preparing instruments, tubing, and liquids.
Instructions for filling the autoclave's water reservoir.
Steps for turning on the autoclave and opening/closing doors.
How to start, run, and unload the autoclave cycle.
Instructions for setting a future start time for the sterilization cycle.
Covers daily, weekly, periodic maintenance and tests.
Instructions for draining the reservoir and cleaning the strainer.
Guidance on checking safety valves and moving the autoclave.
Addresses issues with display, printer, sensors, and range errors.
Covers system, cycle, pressure, and time-related errors.
Addresses errors related to jacket temp, maintenance, water, vacuum, and cycle counts.
| Brand | Tuttnauer |
|---|---|
| Model | 5050 |
| Category | Laboratory Equipment |
| Language | English |












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