Maximum Weather Instruments MYBC User manual

MYSTIC

INSTALLATION

PR ALLA TANTOPER INST TION IS IMPOR . IF T A CONTRACTYOU NEED ASSISTANCE, CONSUL OR, ELECTRICIAN

OR TELEVISION ANTENNA INSTALLER (CHECK WITH YOUR LOCAL BUILDING SUPPLY, OR HARDWARE STORE

FOR REFERRALS). TO PROMOTE CONFIDENCE, PERFORM A TRIAL WIRING BEFORE INSTALLATION.

1

Connect the AC adapter to Mystic and plug into outlet. The display will
briefly light up all the indicator lights (self test). xt the display will showNe
the unit of measurement codes and then will show the barometer function
light and the center display will show a pressure reading. This is the
altitude adjustment mode. Leave it in this mode for now.

Mount the temperature sensor assembly with the two
large wood screws. Select a location that is protected
from direct sunlight and sheltered from rain and physical
damage. (A north exposure, six feet above the ground
will give the best results.)

Form a drip loop with the wire at least eight inches
below the exit from the sensor and at least eight inches
below the point of entr uilding. Anchor anyy into the b
exposed wire with insulated cable clips. Run the wire
through the building to the location where the indicator
will be located. Caulk any holes when done.

4

No .w calibr our altitudeate the barometer for y Obtain the current barometric
pressure for your area by calling a near-by airport or an individual who has a
proper w drly set barometer t a small scre. Inser iver into the recessed slotted
screw at the back of Mystic. Turn the screw while observing the pressure read
out on the front of Mystic. Due to the sensitivity of this adjustment, the numbers
on the display may fluctuate during this procedure. It may take a minute to
achie vv Once the unit is set, moe the exact setting. e the toggle switch to the
right (auto) one time to lock in the setting.

2

3

CAULK

8"

MIN

CABLE

CLIP

DRIP

LOOP

5

Unplug the AC adaptor and disconnect the wires Mystic is now ready for the final installation..
The adjustment that you have made will always remain intact.

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OPTIONAL PANEL

AND TEMPERATURE SENSOR

MYSTIC

INSTALLATION (CONT.)

CABLES FROM AC ADAPTER

6

MERLIN

WALL

Connect the AC adapter wires with
the hex nuts. The polarity does not
matter. Connect the two wires from
the air-temperature sensor to
terminals 4 and 5. Again, the polarity
does not matter.

MYSTIC

Feed the cables from the AC adapter and the temperature
sensor through the wall to Mystic. We recommend using one
of our pre-drilled panels for mounting Mystic. Take precautions
to avoid crimping the wires under the lip of the brass readout.

8

7

CABLE FROM

AC ADAPTER

3

CABLE FROM

TEMPERATURE

SENSOR

3

JUMPER WIRE

CONNECTING

MERLIN AND MYSTIC

NOTE: After any full reset, Mystic will display the pressure adjustment mode. It is never necessary to
perform the pressure adjustment again. Simply exit this mode by moving the switch to Auto and
releasing it.

3

Plug the AC adaptor into a 110VAC outlet. Mystic will power
up and self test briefly then the center display will show the

9

pressure adjustment mode. You must exit the adjustment
mode by moving the switch to Auto and releasing it.

If you own a Merlin, connect the jumper wire (supplied)
to terminals #1 and #2 on Merlin. There will now be two
wires connected to terminals #1 and #2. Connect the
other end of the jumper wires to terminals #1 and #2 of
Mystic. Note that terminal #1 of Merlin connects to
terminal #1 of Mystic and #2 connects to #2.

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MYSTIC

OPERATION

Move the toggle switch at the bottom of the case to the right (auto) and allow it
to return. This manually moves the Mystic through the individual functions. The
illuminated function LED's indicate which function and setting is being displayed.

Moving the toggle s ight (auto) and holding it for at least threewitch to the r
seconds will put Mystic into its Auto sequencing mode Y. ou will see each
function light stay on and that particular information displayed for approximately
four seconds and then mo e to the next function automaticallyv.

If Mystic is Auto sequencing and y n that function off - movou wish to tur e the
toggle s ou can nowitch to the r Yight (auto) and release it. w manually step
through the functions as previously mentioned.

Any Individual function's memory can be independently reset.
Mov witch to the right (auto) until that pare the toggle s ticular function is
displayed. Then move the toggle switch to the left (reset) and hold it for
six seconds kly b. y will quicThe displa lank, indicating that the memory
for that function has been reset.

A "FULL" reset may also be done to clear all memories simultaneously
or if an adjustment to the barometer setting is needed. Toggle through Mystics settings until the "Present"
fuction is displayed. vThen mo e the toggle switch to the left (reset) and hold it for six seconds y. The displa
will self-test and enter into the barometer adjustment mode. y the barometer may be reset at thisIf necessar
time b Exit the barometer adjustment mode by adjusting the set scre .w on the backplate y moving the toggle
switch to the right (auto) and releasing it.

NO ature and/or wind chill data will be displaTE: y "FULL" reset, temperAfter an yed and
stored after ten seconds o min. ed and stored after twPressure data will be display utes.
However, Rate of Change/Pressure will show "HOLD" for 72 minutes following a
"FULL" reset.

When the toggle switch is in the center position Mystic will display the
infor y the function light. All the other functionsmation that is indicated b
data are being recorded and stored.

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MYSTIC

OPERATION (CONT.)

Mystic can be set to displa ature in Fahrenheit or Celsius.y the temper
The barometric pressure can be set to inches of mercury, millimeters
of mercury, millibars or kilopascals. To change the units of
measurement follow these steps:

1. Press the small push button switch on the back of the indicator.
The display will show "F" or "C"

2. ailabPress the push b vutton again to advance through the a le units.

3. When you have the code showing for the units of measurement you
want. Press the toggle switch on the side of the case to the right
(auto position). The display will now show "UN" and a number.
The number indicates the units of measurement for pressure.
UN0 = inches of mercury
UN1 = millimeters of mercury
UN2 = millibars
UN3 = kilopascals

4. ailabPress the push b vutton again to advance through the a le units.

5. When you have the code showing for the units of measurement you want, press the toggle switch
on the side of the case to the right (auto position). Mystic will then perf n toorm a self-test and retur
normal operation.

IN GND OUT

3

IMPORT FACTS ABOUTANT YOUR MYSTIC

Latch Up- Power Line disturbances, improper powering up or an error in wiring can cause a blank or
improper display reading. If MYSTIC is "latched up" in this way proceed as follows:

1. C adapter from the 110 VAC outlet.Unplug the A

2. Wait 15 seconds.

3. C poPlug the A AC adapter in to the 110 V wer outlet.

Dur lank out and the instring long po y will bwer outages MYSTIC's displa ument will not continue to
accumulate data. It will preserve the previously accumulated data for up to 10 years.

Moving the switch to "Auto" does not erase stored information.

You do not need to time the 6 second reset time. y to indicate that theMystic will blank out the displa
memory has been erased.

Set barometer by obtaining an accruate reading from a source as close to your location as possible.
The closest airport, weather bureau or an individual with an accurate barometer would be a few
examples.

Rate-of-Change indicates the measure of the r ed oise or f vall of the barometric pressure obser ver a
one hour per y 12 miniod. erIt is updated ev utes.

The Mystic will display the lowest “Wind Chill” reading since the last time that the memory was reset
when both the “Low” and “Wind Chill” function LED’s are illuminated simultaneously. For this
function to be active you must have a Merlin wind speed and direction instrument and the jumper
wire referenced in step 8 of the Mystic installation instructions must be installed.

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MYSTIC

TROUBLESHOOTING

If at any time the temperature reading seems to be giving you difficulty,
prodeed as follows:

1

Remov ument from the wall.e the instr

3

At the back of the indicator, disconnect the sensor wires from
ter The current temperature reading shouldminals #4 and #5.
drop to -40 F (-40 C) or below. This is the normal open circuit reading.

3

Use a jumper to connect between terminals #3 and #4. The calibration
test point has been hand-written on the bac vek of the Indicator just abo
terminals #3 and #4.

If the indicator is in proper working order, it will read within2Fofthis number. We
recommend you mount the instrument back on the wall in this mode for several
hours and observe it periodically. This will help detect most intermittent problems.
If the indicator registers within2Fofthetest point, the problem is in your sensor or wire.

Use a jumper wire (a paper clip will do) to connect across the sensor

3

terminals #4 and #5. The indicator should read 122 F (50 C). If so,
disconnect this jumper and proceed to the next step.

2

4

3

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MYSTIC

INFORMATION FOR THE MYSTIC USER

Warning: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the
following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.

Shielded cables must be used with the wind sensors to ensure compliance with the
Class B FCC limits.

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Electrical Damage – Common Causes & Recommended Prevention

Electrical damage can be caused by many different factors. Below are
some suggested methods of minimizing potential problems.

Common Causes:

 Storm Activit

way is due to a direct or nearby strike. In addition, lightening storms, dust storms, dry snowstorms and
strong dry winds can all cause static electricity to build up on and around your external sensors. Rega rdless
of the cause, this built up electricity can discharge itself through the cable connecting the external sensors to
the instrument.

 Po

 Yourself – Are you con

wer Surges – A surge may come from the electric company’s switching generators or power grids, from
local in
Even the on-and-off switching of large electrical appliances, such as refrigerators or clothes dryers can
create damaging fluctuations. This is especially true with sensitive weather recording devices.

person? If so, you have a great deal of static electricity in your environment. Depending on where you live,
static electricity may be a year round problem or only a seasonal problem. In either case, it is possible for a
person to carry enough of a charge to damage an instrument.

dustries or after power interruption when accumulated power suddenly surges back through AC lines.

y – lightening in your area can do damage to your instruments in different ways. The obvious

s

tantly giving and/or receiving a shock every time you touch a doorknob or another

Recommended Prevention:

 Use Surge Protec

recommended. This rating will be clearly listed on the packaging of all good qualit y surge protector.

 Discharge Y

make sure that you discharge yourself before touching the instrument(s). The shock that you get from
touching a doorknob or another person can often be sufficient to damage an instrument.

tors – For the AC adapter, a UL 1449 rated surge protector with EMI/RFI filtering is

ourself – If the instruments are located in an environment where static electricity is a problem,

some of the more common causes and

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