Honeywell Enraf small-volume prover controller

Honeywell has launched a major upgrade to its small-volume provers. The Enraf Small Volume Prover (SVP) Controller now allows users to visually monitor and control the operation of the prover in real time on a clear LCD.

Small-volume provers are essential technology in the oil and gas industry to verify the accuracy of flow meters that gauge the volume of liquids being transferred, for example when loading or unloading ships.

The controller’s 6-line LCD displays all critical prover data, including piston position, motor status, error status, cycle value, proving run date and sweep time. A handheld local access device (LAD) allows users to fully program the controller and provides multiple diagnostics, an active and historical alarm log, secure alarm acknowledgement and clearing, and with an option kit, full management of the water draw sequence.

A sweep time display in seconds with repeatability in milliseconds provides precise visual reading of the time taken by the piston to travel between upstream and downstream optical switches - vital for pulse-generation calculations and the repeatability of proving runs. An on-screen cycle counter and customisable preventative maintenance service alarm improve reliability, and an adjustable delay, to keep the motor running after the motor stop switch is activated, allows the drive system to position the puller bar closer to the piston catch for the next proving cycle, cutting cycle times.

The SVP is intrinsically safe and, combined with flameproof design, has ATEX and CSA approval for use in hazardous areas.