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Customer application 21 September 2017

Load Management Using Standardized Technology

While general cargo and container ships can easily count and add up the loads connected to their cargos for effective load management, precise level measuring devices are required for tankers. Krohne Marine from Norway is considered one of the global experts in this field, with more than 50 years of experience in designing load-monitoring and management systems for tankers. Krohne is using standardized control technology from WAGO in their new generation of “Cargomaster” systems, and replacing their proprietary electronics.

By using “Cargomaster,” ships’ crews constantly have the level of their tanks at their fingertips. The complete solution from Krohne Marine includes the entire monitoring system, from alarms, to visualization and connection to higher-level control systems, in addition to straight level measurement systems. Krohne uses their OPTIWAVE 8300 C Level Radar for the actual measurements at the load level. In addition to level measuring, the system – designed in Brevik, Norway – can also monitor pumps, conduits and the ship’s draught. Until recently, the Norwegians developed most of the necessary electronics themselves – primarily with the assumption that this would maximize precision and uptime. Their innovation is reflected in an abundance of patents, among other things.

Tank Ballast and Cargo Management – Here’s How WAGO Supports You:

Standardized Instead of Proprietary

Krohne Marine is symbolic of proprietary systems, which function excellently; however, against a background of long operating times during freight travel, they also increase costs for product updating, replacement part inventory and service. These outcomes are typical for proprietary developments, particularly in control hardware. Therefore, within the context of upgrading the “Cargomaster,” Krohne went looking for a partner in industrial control technology, with whom they could perform maritime tasks with off-the-shelf products. The use of standardized components was possible because the Norwegians’ expertise lies in the design and implementation of software, rather than the hardware, as the Director of Research and Development at Krohne Marine, Svein Henriksen explains. “Using off-the-shelf products currently allows us to reduce costs, primarily in development and production.”

Optimal – in Terms of Price, Performance, and Availability

Prior to making the strategic decision to rely on WAGO’s industry-proven, standardized control technology in their tank management systems, the Norwegian company compared diverse solutions from leading manufacturers. “We were looking for a supplier with products that could accommodate our requirements without long adaptation times – even in areas with extremely high demands, like explosion protection. In addition, the products that we use have to have the corresponding approvals from the classification agencies,” explains Henriksen, who manages the Service Department at Krohne. From a functional perspective, the new hardware had to provide high performance – especially in communication capabilities. These criteria ultimately led to the decision to use the WAGO 750 I/O SYSTEM. “With WAGO, we found a vendor that meets our needs,” states Jon Anders Eriksen, the man in charge of process control technology at Krohne Marine. The collaboration functioned extremely well from the start – including intensive support in software engineering and training.

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Unpredicted Options

The partnership ultimately led to a system in which the software was not merely implemented in the new control hardware, but instead was highly adapted for optimal interplay between software and hardware. This in turn led to a significant increase in performance compared to previous generations. Because they decided to stop developing their own hardware, and to begin using standardized modules, Krohne Marine was also able to tap into advantages for applications in the Ex areas. Background: the WAGO 750 I/O SYSTEM includes modules for both the Ex and non-Ex areas. Functionally, these modules are not different; they are distinguished by their design and external color. Within the WAGO system, blue is the color for explosive areas.