ACU-RITE 990 User manual

00990 INST0330-06
Do not return product to retail store. For Technical Assistance and
product return information, please call Customer Care:
877-221-1252
HOURS: Monday through Friday from 8:00 a.m. to 4:45 pm CST.
Main UnitsWireless Sensor
Wireless Thermometer
combo pack with 2 main units
Instruction Manual
Thank You! We appreciate you for purchasing this wireless thermometer.
We hope you enjoy using this versatile wireless thermometer!
Features:
• Dual main units with syncronized outdoor LCD temperature displays.
• Wireless Sensor – range is 100’ (33m).
• Temperature measurement ranges:
Indoor main unit: 32º F to 122º F
Outdoor remote sensor: 0º F to 130º F
• Battery operated. (batteries not included)
1 CHECK PACKAGE CONTENTS
(2) Main units - dimensions each: 1.5” x 4.75” x 1.5”*
(1) Wireless Sensor – dimensions: 2” x 2.5” x 1.3”*
(1) Instructions
*Dimensions are approximate.
NOTE: Carefully remove the units from their packaging. Discard the packaging and
save the instructions.
2 READ
Please read these instructions carefully before you set up the thermometer. In this
way you can become familiar with all of the thermometer’s features and get the most
benefit from them.
MODEL # 00990
INDOOR
OUTDOOR
INDOOR
OUTDOOR
PLEASE DISPOSE OF OLD OR DEFECTIVE BATTERIES IN AN
ENVIRONMENTALLY SAFE WAY IN ACCORDANCE WITH
YOUR LOCAL REGULATIONS

Main Unit Batteries: On the back of each main unit, remove the battery compartment
covers. Insert 2 AAA alkaline (or lithium) batteries in each main unit making sure they are
installed according to the correct polarity (+/-). Replace the covers on each main unit.
Wireless Sensor
Main Units
Wireless Sensor
This water resistant wireless sensor is intended for outdoor use. When deciding where to
place the sensor, make sure it will be protected from direct sunlight and precipitation. Do not
drop the remote sensor. It is sensitive, and not designed to withstand high impact blows.
Wireless Sensor Batteries: On the back of the wireless sensor unit, remove the battery
compartment cover. Insert 2 AAA alkaline (or lithium) batteries making sure they are
installed according to the correct polarity (+/-). Replace the cover.
You may need to wait a few minutes after batteries are installed for the units to communi-
cate with each other. When they do, both the indoor and outdoor temperatures will be
shown on the main unit LCD display. If nothing is displayed after a few minutes, refer to
section 4 of this manual for troubleshooting.
NOTE: The wireless sensor’s LED flashes momentarily whenever it sends information –
about once each minute.
5 ADDITIONAL INFORMATION
Batteries: 6 x AAA alkaline cell batteries total (not included).
4 TROUBLESHOOTING
Main Unit LCD display
shows – – – continuously
for the OUT display.
Main Unit LCD display is
blank. The main unit does
not display any readings
Main Unit LCD display is
operating erratically
Wireless Sensor Unit is
operating erratically
a. Wireless sensor is located too far from the main
unit, move the sensor closer to the main unit.
b. Sensor batteries may need replacing, replace
batteries according to instructions in this manual.
NOTE:After replacing remote sensor batteries, you must
press the RESET button on the main unit.
Follow section 3 of this instruction booklet and
replace the batteries in the main unit.
The main unit may be affected by electrical interfer-
ence. Press the RESET button on the main unit. This
should give you the indoor temperature immediately
and the outdoor temperature within one minute.
The sensor may be affected by electrical interference.
Press the RESET button on the remote sensor.
(located inside the battery compartment between the
batteries.) If the RESET button is pressed, you then
also must press the RESET button on the Main units.
You may also need to relocate all units away from any
electronic interference to restore normal operation.
PROBLEM SOLUTION
3 INSTALLATION
PULL BOTTOM
OUT & DOWN
TO OPEN COVER
AAA
AAA
AAA AAA
INDOOR
OUTDOOR
INDOOR
OUTDOOR
Main Units
The Main units are intended for indoor use only. When deciding where to put the main units,
choose a dry location away from dust, dirt, mold and smoke, and avoid temperature
extremes. Do not drop the main units. They are sensitive electronic devices, and are not
designed to withstand high impact blows.
NOTE:Install batteries in both of the MAIN UNITS before installing batteries in the
wireless sensor.
Placement & Mounting
Choose a location for each unit that is at least 10 feet away from other electronic devices
that may interfere with the wireless signal. When you decide on a good location, (A steady
signal from the sensor is being received by the main unit LCD display), hang the main unit
and wireless sensor using the triangular indents found on the backs of the units.
You may choose to place the main units on a table-top or desktop surface.
Pictured above is a common placement scenario. The main units can be placed
anywhere within 100 feet of the wireless sensor. Placement is not limited to one unit
being placed on a first and second level of a building or house as pictured here.
LITHIUM
BATTERIES
ALKALINE
BATTERIES
-22ºF 158ºF
-4ºF 158ºF
(-30ºC) (70ºC)
(70ºC)
(-20ºC)
Operating Range of Batteries Severe cold (below -4º F/-20º C) can cause alkaline
batteries to freeze and function improperly. Use lithium
batteries in extremely low temperature conditions to
ensure continued operation.