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CRITERION
INSTALLATION
PROPER INSTALLATION IS IMPORTANT. IF YOU NEED ASSISTANCE, CONSULT A CONTRACTOR, 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.
Mount the temperature sensor assembly with the two
1
large wood screws. Select a location that is protected
from direct sunlight and sheltered. (A north exposure, six
feet above the ground will give the best results.)
8"
MIN
2
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 entry into the building. Anchor any
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.
WOOD
SCREWS
CAULK
CABLE
CLIP
DRIP
LOOP
Feed the AC adaptor's cord and the sensor wire to the indicator.
Connect the the two wires of the AC adaptor cord to the back of the
indicator with the supplied brass nuts. The polarity does not matter.
Connect the two wires from the temperature sensor to #1 and #2
screw terminals (reading #1 through #5, left to rignt). The polarity
does not matter. Do not plug the AC adapter in until all of the
connections have been made and checked.
CABLE-HOLE
PANEL
L
WAL
SCREW
TO
TEMPERATURE
SENSOR
3
AC
ADAPTOR
SCREW
4
Mount the brass read-out directly over the cable
feed-thru-hole to avoid crimping the wire under the lip.
We recommend mounting the read-out on one of our
pre-drilled and centered panels. Plug the power supply
into a 110 VAC power outlet.
30 Barnet Boulevard
New Bedford, MA 02745
(508) 995-2200
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CRITERION
OPERATION
Before reading your thermometer, you should
1
lightly tap the case with your finger. A TAP change
of 1-2 degrees is a common occurance with any slow
moving precision meter movement.
The trend register needle can be set by
turning the center knob on the indicator dial.
TROUBLE SHOOTING
Unplug the AC adaptor and remove the instrument from the wall.
1
Disconnect the AC adaptor from the indicator and
connect it to an AC Voltmeter. Plug the AC adaptor
back in.
3
4
5
If working properly the AC adaptor will deliver 11.5 to 18VAC.
If not working properly please contact the factory. If the AC
adaptor is working properly, continue with the next steps.
Unplug the AC adaptor and reconnect it to the indicator.
Plug the AC adaptor back into a 110V outlet.
Disconnect the sensor wires from terminals #1 and #2 on the back of the indicator. The indicator
pointer should drop to -35 F or below.
Use a jumper wire (a paper clip will do) to connect across the sensor terminals
#1 and #2. The indicator should read 120 F. If so, disconnect this jumper and
6
proceed to the next step.
2
AC
ADAPTOR
AC
VOLTMETER
2
7
Use a jumper wire to connect across terminals #2 and #3. The
calibration test point has been hand-written on the back of the
indicator just above terminals #2 and #3. If the indicator is in proper
working order it will read within 2 F of this number. We recommend
that you re-mount the instrument in this mode for several hours and
observe it periodically. This will help to detect most intermittent
problems. If the indicator registers within 2 F of the test point, then
the problem is in the sensor or wire.
30 Barnet Boulevard
New Bedford, MA 02745
(508) 995-2200
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CRITERION
2 OR 3 SENSOR OPTIONS
As a factory installed option, the Criterion has the ability to be built as a two sensor instrument
or three sensor instrument. This allows the ability to display temperatures from various locations.
You may install additional air temperature sensors, water temperature sensor, or we can build
in an internal ambient temperature sensor.
2 Sensor wiring, 2 position toggle switch
AC
ADAPTER
1 234
TO
SENSOR 1
5
TO
SENSOR 2
Sensor 1: Terminal 1 and Terminal 2
Sensor 2: Terminal 4 and Terminal 5
Test Point: Terminal 3 (See troubleshooting)
.
3 Sensor wiring, 3 position toggle switch
AC
ADAPTER
1 234
5
TO
SENSOR 1
TO
SENSOR 3
TO
SENSOR 2
Sensor 1: Terminal 1 and Terminal 2
Sensor 2: Terminal 3 and Terminal 4
Sensor 3: Terminal 4 and Terminal 5
30 Barnet Boulevard
New Bedford, MA 02745
(508) 995-2200
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R
W E A T H E R I N S T R U M E N T S
Electrical Damage - Common Causes & Recommended Prevention
Electrical damage can be caused by many different factors. Below are some of the more common causes and
some suggested methods of minimizing potential problems.
Common Causes:
Storm Activity - lightening in your area can do damage to your instruments in different ways. The obvious
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. Regardless
of the cause, this built up electricity itself through the cable connecting the external sensors to
the instrument.
Power Surges - A surge may come from the electric company’s switching generators or power grids, from
local industries or after power interruption when accumulated power suddenly surges back through AC lines.
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.
Yourself - Are you constantly giving and/or receiving a shock every time you touch a doorknob or other
person? If so, you have a great deal of static electricity in your environment. In either case, it is possible for a
person to carry enough of a charge to damage an instrument.
Recommended Prevention:
Use Surge Protectors - for the AC adapter, a UL 1449 rated surge protector with EMI/RFI filtering is
recommended. This rating will be clearly listed on the packaging of all good quality surge protector.
Discharge Yourself - If the instruments are located in an environment where static electricity is a problem,
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.
30 SAMUEL BARNET BOULEVARD NEW BEDFORD, MASSACHUSETTS 02745 U.S.A.
TEL. 508.995.2200 WWW.MAXIMUM-INC.COM FAX 800.989.2580
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