Arbiter Systems 1088A, Operation Manual

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Chapter 10
Startup and Basic Operation
10.1 Initial Startup Sequence
Before powering ON any of these clock models, make sure that the chassis cover is installed and if
equipped with a power switch, that inlet power is properly connected to the power inlet connector.
If the clock does not have a power switch, then the clock will begin the startup sequence when inlet
power is connected to the rear panel. When power is switched ON, the normal startup sequence
follows approximately as listed below:
•
All the annunciator LED’s should illuminate, then all but the OPERATE, ON LINE and
UNLOCKED LED should extinguish.
•
The LCD should display several introductory messages – see below.
•
The Out-of-Lock Relay (if so equipped) will be in the out-of-lock (faulted) position.
•
Eventually, the UNLOCKED LED should extinguish.
•
If equipped, the out-of-lock relay should change to the locked (non-faulted) position in sync
with the out-of-lock LED.
•
The LCD STATUS should indicate that the clock is Locked and in Position Hold.
10.1.1 Clock Time, Startup Mode
When the clock first starts, it will not indicate the correct time until it is locked to the GPS.
Pressing the TIME key before the UNLOCKED LED is extinguished will produce the message:
TIME NOT AVAILABLE
For IRIG-B time, it will begin counting from zero, with the Julian Day also set to zero. This
method was chosen so that there would be no mistake in interpreting that the clock was in startup
mode. For example, the time could indicate as follows:
000:00:00:01
000:00:00:02
000:00:00:03
.