Feature sponsored by Calibration
temperature measurements in explosive environments, for example at oil refineries where gases could explode. Similarly, Fluke Calibration metrology baths use the 2100 benchtop temperature controller which has several safety devices built in to prevent excessive temperatures, currents or voltages from occurring under any possible failure condition. These devices include a ‘watchdog circuit’ which checks the status of the microprocessor that controls the functions of the temperature controller. Another safety feature is the analogue temperature control where analogue circuitry handles the temperature control function to ensure steady temperature control continues
even if the microprocessor should freeze up. Yet another safety feature is a soft cut-out, which means heat will be switched off by the control sensor microprocessor as soon as the metrology bath fluid exceeds a pre-set temperature. Should the bath temperature exceed the cut-out set-point, a hard cut-out will kick in, using a separate circuit to turn off the power. Further safety features include a grounded chassis and fuses (over-current protection devices) on each leg of the AC supply which are rated slightly higher than the maximum normal operating current of the bath. These protect both device and user against electrical short circuits.
NO COMPROMISES WHERE SAFETY IS INVOLVED
Another example of equipment with safety automatically built in is Fluke’s 5322A electrical tester calibrator. This has been designed to help calibration technicians comply with new regulatory standards up to four times faster than when using traditional manual, multiple-product methods. Replacing discrete resistors, decade boxes and other custom solutions that are traditionally used to calibrate electrical testers, the 5322A calibrator combines many functions into a single box which means users no longer need to learn how to operate and maintain a number of separate instruments. Wim Sibon, Fluke Calibration regional product manager for Software Calibration in Europe, Middle East and Africa (EMEA), says: “Calibration improves safety and by having top quality calibration at every step of a process we can help to keep people safe, which is especially important in environments and industries that demand hypersensitive control. By using tools that are designed and built with the optimum safety of users in mind, calibration technicians can be sure that workers further down the line who use the tools that have been calibrated are operating at the highest possible levels of safety. There can never be any compromises when it comes to safety.”
Fluke Calibration Instrumentation Monthly June 2023
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