BA364D

Intrinsically Safe Externally Powered Counter, Timer, Tachometer and Clock

• Intrinsically Safe
• ATEX II 1G EEx ia IIC T5
• Operating Temp. Range -20°C to +60°C
• IP66

The BA364D is an intrinsically safe multi-function instrument that may be programmed to perform a host of counting and timing functions. Easy to use menus allow the instrument to be configured as a counter, timer, tachometer or as a clock. Both of the inputs will operate from 2-wire proximity detectors, switch contacts, magnetic pick-offs or voltage pulses. Optional alarm outputs further extend the may applications. Counting may be from one or both inputs. The pulses at each input can be added to, or subtracted from each other, and the result may be scaled to provide a display in engineering units. Alternatively, pulses on one input can increment or decrement the total count depending upon the state of the other input. The BA364D can also accept quadrature inputs and hence display direction and position. The total display may be reset to zero via the instrument controls or by a remote contact closure. The timer function is controlled via the two inputs, the elapsed time being displayed in seconds, minutes and hours, or in a single unit of measurement. Addition of the optional alarm outputs enables the instrument to control processes, which are required to operate for a fixed duration.

Rotational speed may be measured using the tachometer function which will display revolutions per second, minute or hour, and which includes an adjustable digital filter to optimise display stability. When fitted with alarms over and under speed warnings can be generated. Configuration as a digital clock enables time to be accurately displayed within a hazardous area and, with the addition of the optional alarms, hazardous or safe area loads may be turned on and off up to three times in each twenty four hour period. Control and programming of the BA364D is performed via four push buttons, which are protected from damage and tampering behind a sealed cover. For applications requiring frequent adjustment, the instrument can be supplied with a robust external membrane keypad. All the programme functions are contained in easy to understand menus, which may be protected by a user definable security code. To simplify calibration the scaling factors employ floating decimal points.