Maximum Merlin (pre-2001) - Manual (Page 4)

MERLIN
IMPORTANT FACTS ABOUT YOUR MERLIN (CONT.)
Samuel Barnett Boulevard
New Bedford, MA 02745
(508) 995-2200
Forcast- When first powering up MERLIN, after long power outages, or when totally resetting, the
Forcast display will read "hld" (hold) for 24 minutes while MERLIN is loading its memory. During the
25th minute MERLIN will make a trend reading "inc" (increase), "dec" (decrease), "---" (no change)
in wind speed based on comparing two 12-minute blocks of time. If there has been no wind for an
entire 12 minute timing interval, the direction lights will blank out. If there is no wind for the next
12 minutes then the display will show "---" and the direction lights will remain off.
Wind Direction- MERLIN takes a reading every second. When the wind changes direction very
rapidly (faster than 1 second), some direction lights may not light. This is normal operation as
MERLIN is simply between readings.
Latch Up- Power Line disturbances or improper powering up (plugging in the
AC Adapter before wiring) can cause a blank or improper display reading. If
MERLIN is "latched up" proceed as follows:
1. Remove the Brass Indicator from the wall or panel.
2. Set the switch on the back of the indicator to the
UNLATCH position.
3. Wait 15 seconds.
4. Set switch to NORMAL
5. Remount Indicator on wall or panel.
During long power outages MERLIN's display will blank out and the instrument will not continue to
accumulate data. It will preserve the previously accumulated data for up to 15 hours.
Using the Forcast function and periodically updated Average function together, you can often watch
not only small changes in wind conditions but more significant "backing" and "veering" pattens fortelling
frontal movements.
If you are unsure as to when Forcast made it's last update, wait more than 12 minutes and read again
(it updates every 12 minutes).
When MERLIN is in the Peak, Average, and Forcast modes the direction lights blink. This indicates
that you are observing recorded data and not the present wind direction.
Setting the switch to Auto does not erase stored data.
You do not need to time the 6 second reset time, MERLIN will blank out the display to indicate that the
memory has been erased.
UNLATCH NORMAL