New digital hydraulic multimeter

Fault-finding and regular monitoring of hydraulic systems is vital to help warn of imminent failures so that preventive action can be taken. Users of hydraulic test equipment also benefit from a reduction in costly system downtime and from a reduction in repair costs.

The Webster DHM403, a portable digital hydraulic multimeter from Webtec Products, can help identify underperforming components, thereby eliminating the guesswork in identifying the cause of system inefficiency. The DHM403 has been developed primarily for field testing of mobile machinery as it allows the user to accurately measure five parameters simultaneously and display them all digitally on one screen. The multi-purpose testing tool combines precision flow, pressure, peak-pressure and temperature measurement with a tool to measure pump volumetric efficiency at the touch of a button.

The new design also incorporates a pressure transducer rather than a traditional gauge, thereby allowing the user to measure pressure faster and more accurately. For normal operation, the unit is rated to 420 bar but the pressure transducer has a 600 bar range and with a 2ms response time, making it suitable for capturing pressure spikes. The DHM has three display screens, including a trend display for times when the overall picture is more important than the exact values.

The DHM403 includes a built-in microprocessor, allowing all values to be measured with a high degree of accuracy. It measures flows between 10 litres/min and 400 litres/min to an accuracy of 1% of the indicated reading.

As with all Webster testers the DHM403 benefits from the inclusion of the Interpass safety system built into the pressure-loading value. This ensures the user and the system are protected from the consequences of accidentally over-pressurizing the system.