Meriam MFC5150 HART Communicator Manual - Manual (Page 11)

5
2.0 GENERAL OPERATION
2.1 Power Button
The Power Button has four functions:
Power On – Whenever the communicator is in an “Off” state, pressing the power key turns the
communicator on. This is a complete system start. The communicator will execute a complete power op
sequence. Information regarding the time and date is briefly displayed to allow the user to verify the
communicator’s readiness
.
Standby Operation – When the communicator is fully on, and the power button is pressed briefly, the unit
enters the Standby state where allowed. In this state the display is off and most user input is ignored to
conserve battery power between uses. The on-board computer maintains the previous system state to
provided rapid recovery (Resume Operation).
Resume Operation - When the communicator is in Standby Operation, and the power button is pressed
briefly, the unit quickly resumes operation, returning to a fully “On” state of functionality at the same menu
level that was interrupted.
Power Off – When the communicator is fully on, and the power button is pressed for three seconds, the unit
will power down completely where allowed. This conserves the most battery power but requires a full
initialization when the unit is turned on again.
2.2 Backlight
The Backlight has 5 intensities from minimum to full Brightness. The user can select intensities by pressing
the Backlight Button. Backlight intensity affects battery life. A lower intensity level will increase operation
time.
2.3 Display Auto Dim Timer
Display Auto Dim is a configurable mode that allows the user to minimize the backlight when there is no
user or HART
® activity detected by the communicator for a user defined period of time. This period is
adjustable using the Display Auto Dim Timer. A shorter period will decrease battery consumption when the
communicator is not being used.
2.4 Auto Standby Timer
Auto Standby is a configurable mode that allows the user to automatically put the communicator into a
standby state when there is no user or
HART ®
activity detected by the communicator for a user defined
period of time. The inactivity period is adjustable using the Auto Standby timer. . In combination with the
Display Auto Dim Timer, shorter period will decrease battery consumption. The standby timeout begins
when the Auto Dim Timer times out. If the Auto Dim Timer is set to “Never” the standby timeout will not
begin.
2.5 Portable Operation / Battery Life
The communicator is powered by a rechargeable li-ion battery pack for portable operation. A full charge
typically allows for 10 hours of continuous operation, or 200 hours of standby. See section 2.7 for
instruction on battery removal and replacement. Replacement battery packs are available from Meriam (PN
Z9A820).