6
Calibrate the Rain Gauge
The rain gauge on the AcuRite Iris sensor can be calibrated to improve accuracy.
Items Needed
: AcuRite Iris sensor, companion unit, plastic cup, pin, screw driver
1. First, ensure AcuRite Iris sensor is perfectly level using built-in bubble level.
2. Use compatible companion unit or AcuRite software to monitor during calibration.
3. Make a pin hole in the bottom of a plastic cup. Hold the cup over the rain gauge and fill it with exactly
1 cup (8oz) of water, allowing the water to drip into the rain gauge. You should hear the internal buckets
tip and see water drain through the rain gauge.
4. A few seconds after each bucket tip, the companion unit displays rainfall in approximately 0.01” or
more increments.
5. The cup of water should take more than 20 minutes to empty; a quicker period will result in inaccurate
calibration. Try to simulate a normal steady rainfall. When cup is empty of water, companion unit should
register 1.06”
Tips
• There should be nearly an equal number of water drops (about 25 water drops) between bucket tips. If
not, adjust the calibration screws on the bottom of the AcuRite Iris sensor until an equal number of water
drops are tipping the buckets.
Adjustment
If the rain gauge doesn’t register close to 1.06”, make an EQUAL adjustment to the two calibration screws
on the bottom of the AcuRite Iris sensor. Turning screws clockwise increases rainfall; counter clockwise
decreases rainfall.
•To adjust the rainfall reading by 2% turn both screws 1/8 of a turn.
•To adjust the rainfall reading by 4% turn both screws 1/4 of a turn.
•To adjust the rainfall reading by 8% turn both screws 1/2 of a turn.
Specifications
TEMPERATURE RANGE
Outdoor: -40
º
F to 158
º
F; -40
º
C to 70
º
C
HUMIDITY RANGE
Outdoor: 1% to 99%
WIND SPEED
0 to 99 mph; 0 to 159 kph; 0 to 86 knots
WIND DIRECTION INDICATORS
16 points
RAINFALL
0.01 inches (0.25 mm) and up
WIRELESS RANGE
330 ft / 100 m depending on home construction materials
OPERATING FREQUENCY
433 MHz
POWER
4 x AA alkaline or lithium batteries
DATA REPORTING
Wind Speed: 18 second updates; Direction: 30 second updates
Outdoor temperature & humidity: 36 second updates
FCC Information
This device complies with part 15 of FCC rules. Operation is subject to the
following two conditions:
1- This device may NOT cause harmful interference, and
2- This device must accept any interference received, including interfer-
ence that may cause undesired operation.
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 the 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.
NOTE: The manufacturer is not responsible for any radio or TV interfer-
ence caused by unauthorized modifications to this equipment. Such
modifications could void the user authority to operate the equipment.
This device complies with Industry Canada licence-exempt RSS
standard(s).
Operation is subject to the following two conditions:
(1) This device may not cause interference, and
(2) This device must accept any interference received, including interfer-
ence that may cause undesired operation of the device.
