When a food producer invests in an industrial freeze dryer, the machine itself is only part of the picture. The other part is how the operator interacts with it — the touchscreen, the menus, the alarms, the recipe settings, the data records. For many companies, the HMI (Human-Machine Interface) is not just a control panel. It is the daily point of contact between the production team and the equipment. That is why more and more buyers ask a practical question before placing an order: can the HMI be customized to match our brand, our language, and the way our operators actually work?
The short answer is yes — within certain technical and safety limits. Understanding what can be changed, what cannot, and how to plan for it will help you get the most from your freeze dryer without creating unnecessary risk or cost.
Brand theme: logo, colours, and a familiar interface
The first layer of customization is visual identity. An HMI can be configured to show your company logo, company name, and brand colours on the start-up screen and the main operating interface. This is not a cosmetic detail. When operators see a screen that reflects their own company, the equipment feels like part of the production line rather than a generic import. It also helps during customer visits, audits, and training sessions, because the interface looks professional and consistent with your other systems.
Customization at this level is usually done at the factory before shipment. To proceed, the buyer provides a logo file and the preferred Pantone colour codes. The manufacturer then adjusts the HMI project and tests it as part of the final machine configuration. This is a relatively straightforward process and does not affect the machine’s control logic.
Language: standard options and additional languages
Language is the second common request. A freeze dryer may be operated by people who speak different languages across different shifts. A standard HMI often supports several major languages, and the operator can switch between them on any page. This reduces training time and the risk of misunderstanding during a critical stage such as freezing, sublimation, or final drying.
If a required language is not already included, it can usually be added. The buyer provides the translated text for the interface labels, alarms, and messages, and the manufacturer integrates it into the HMI project. The cost and lead time depend on how many languages are needed and how much text must be translated. For companies operating in multiple countries, this is often a worthwhile investment.
Operator workflow: recipes, access levels, and daily routines
The third and most valuable layer of customization is the operator workflow. This includes how recipes are managed, how heating stages are set, how alarms are handled, how data is exported, and how different users are given different levels of access.
A typical industrial freeze dryer already includes recipe management, stage heating, data logging, and alarm history. But the way these functions are arranged on the screen can be adjusted to match a company’s standard operating procedure. For example:
- Operators can have a simplified screen that only allows them to start, stop, and monitor a batch.
- Supervisors can have access to recipe editing and alarm reset.
- Engineers can have full access to parameter settings and diagnostic data.
- Start-up and shutdown sequences can be arranged in the order that matches the company’s SOP.
- Data export can be configured to produce reports in the format required by the quality team.
This kind of customization improves consistency, reduces human error, and makes it easier to train new operators. It also supports traceability and audit requirements, because the HMI records who did what and when.
What cannot be changed — and why
While brand theme, language, and operator workflow can be customized, there are limits. The safety-critical PLC logic and equipment protection functions are part of the machine’s certified control system. These include emergency stops, pressure and temperature protection, compressor interlocks, and vacuum safety logic. They cannot be freely changed because doing so could compromise the safety of the equipment, the product, or the people operating it.
Any customization that affects the control sequence must be reviewed by the manufacturer’s engineering team. It may require additional development, testing, and documentation. It may also affect the warranty scope if the modification is not approved by the manufacturer. This is not a restriction designed to limit the buyer — it is a necessary part of delivering a reliable and safe industrial machine.
What information is needed to plan HMI customization
If you want to customize the HMI, the manufacturer will typically ask for the following:
- Your company logo file and preferred colour codes.
- The list of languages you need, with translated text if available.
- A brief description or sketch of the desired operator workflow.
- The user access levels you require for operators, supervisors, and engineers.
- Any specific data export or reporting format required by your quality system.
With these details, the manufacturer can confirm what is feasible, what is not, the additional cost, and the lead time.
How Kemolo approaches HMI customization
Kemolo has manufactured freeze dryers for more than twenty years, with machines operating in over one hundred countries. The FD series industrial freeze dryers use Siemens PLC and HMI systems, which are well known for their reliability and flexibility.
For customers who need a customized interface, Kemolo’s engineering team can adjust the HMI project before shipment. Standard language options include English, Spanish, Russian, and Chinese, and additional languages can be added on request. Brand logos and colours can be integrated into the start-up screen and main interface. Operator workflows can be configured to match different access levels and standard operating procedures.
At the same time, Kemolo maintains strict control over safety-critical logic and equipment protection. Any request that touches the control sequence is reviewed carefully, and the customer is informed of any impact on cost, lead time, or warranty. This balanced approach gives buyers the flexibility they need without compromising the reliability of the machine.
The practical takeaway
HMI customization is not an all-or-nothing proposition. Brand theme, language, and operator workflow can all be adjusted to a practical degree. Safety-critical logic remains protected, as it should be. The best results come when the buyer and the manufacturer discuss the requirements early, before the machine is built, so that the HMI can be configured, tested, and delivered as part of the complete system.
