The BA369 is an intrinsically safe, battery powered, panel mounting digital clock that will accurately display local time in a hazardous area. The clock incorporates a temperature compensated crystal oscillator that ensures less than one minute error per year at ambient temperatures between 0 and 40°C. For most industrial applications this accuracy is adequate, but if greater precision is required, or the display must be traceable, the BA369 may be synchronised with an external time standard.

The BA369 is an intrinsically safe, battery powered, panel mounting digital clock that will accurately display local time in a hazardous area. The clock incorporates a temperature compensated crystal oscillator that ensures less than one minute error per year at ambient temperatures between 0 and 40°C. For most industrial applications this accuracy is adequate, but if greater precision is required, or the display must be traceable, the BA369 may be synchronised with an external time standard.

 The 25mm high wide-angle display is easy to read and allows installation of the clock in almost any panel or cubicle.

Hours and minutes are continuously displayed separated by a flashing colon to show that the clock is functioning correctly. Operating a front panel push-button will change the display to seconds or to the date. When the button is released the original display will return.

ATEX intrinsic safety certification permits permanent installation in Zones 0, 1 or 2. When used as a stand-alone clock no wiring is required. The clock is powered by an internal BA491 intrinsically safe battery that may be replaced within the hazardous area.

Programming and adjustment are performed via the front panel pushbuttons which, to prevent unauthorised adjustment, may be protected by a user selectable four digit security code. All settings and adjustable parameters are contained in a simple, easy to use menu. In addition to entering the local time and date, this menu allows a twelve or twenty four hour format and automatic daylight saving to be selected. If used, the type of synchronisation can also be defined.

Three different synchronisations are selectable from within the programme menu. Connecting synchronising terminals 1 and 2 together will stop the clock at the current displayed time. When the terminals are disconnected the clock will restart from the nearest minute, the nearest hour or from a preset time entered via the programme menu. The two synchronising terminals have intrinsic safety output parameters that allow up to ten clocks to be connected in parallel. All the clocks may be synchronised by a single hazardous area switch, or connected to a common Zener barrier or galvanic isolator and synchronised from the safe area.

Elapsed time may also be displayed by the BA369 clock when the synchronising preset time is set to 00:00. Disconnecting the two synchronising terminals will reset the display to 00:00 and start the clock running. When the terminals are reconnected the clock will stop and display the elapsed time.

The front panel of the BA369 has IP65 protection and a neoprene gasket seals the joint between the clock and the panel making it suitable for use in areas that will be hosed.