C A C8536A Professional Rain Gauge with Thermo Hygro and RC Clock User Manual

C A C8536A Professional Rain Gauge with Thermo Hygro and RC Clock

Specifications

• Model: C8536A / C3150A
• Product: Professional Rain Gauge with Thermo-Hygro and RC Clock

Product Features

The Professional Rain Gauge with Thermo-Hygro and RC Clock offers the following features.

• Main Display Unit with comprehensive weather data
• Wireless rain gauge sensor for accurate rainfall measurement
• Temperature and humidity display with Heat Index and Dew Point information
• Maximum/minimum memory function for tracking weather trends
• Hi/Lo alert settings for customized notifications
• Wireless signal reception for seamless data transmission

Installation To install the Professional Rain Gauge with Thermo-Hygro and RC Clock, follow these steps.

1. Installation of Wireless Rain Gauge Sensor:
   • Battery and Installation: Insert batteries into the sensor and position it securely.
   • Mounting Guidelines: Follow the recommended guidelines for mounting the sensor in an open area.

History Data To access the history data of all records follow these steps.

1. To Check History Data: Navigate to the appropriate menu on the main display unit.

Temperature & Humidity DisplayTo view temperature, humidity, Heat Index, Dew Point, and comfort indication, follow these instructions.

1. To View the Heat Index and Dew Point: Access the relevant menu on the display unit.
2. Comfort Indication: Monitor the comfort level based on displayed information.

Maximum / Minimum Memory Function To utilize the maximum/minimum memory function, use the following steps.

1. To Check the Memory: Review stored records on the display unit.
2. To Clear Individual Records: Remove specific data as needed.

Hi / Lo Alert To set up and manage Hi/Lo alerts, follow these instructions.

1. To Set the Hi / Lo Alert: Configure alert thresholds on the device.
2. To Enable/Disable the Hi / Lo Alert: Toggle alert functionality as required.

Wireless Signal Reception The device is equipped with wireless signal reception capabilities for seamless data transfer. Data Clearing To clear data from the device, follow the provided instructions in the user manual.

Frequently Asked Questions

Q: How often should I replace the batteries in the sensor?

A: Battery life may vary but it is recommended to replace them annually for optimal performance.

Q: Can I mount the rain gauge sensor indoors?

A: It is recommended to mount the sensor outdoors in an open area for accurate rainfall measurement.

Q: How do I check the history data on the display unit?

A: Navigate to the appropriate menu using the controls on the display unit to access history data.

Important note:

• Read and keep these instructions.
• Heed all warnings.
• Follow all instructions.
• Do not subject the unit to excessive force, shock, dust, temperature, or humidity.
• Do not cover the ventilation holes with any items such as newspapers, curtains, etc.
• Do not immerse the unit in water. If you spill liquid over it, dry it immediately with a soft, lint-free cloth.
• Do not clean the unit with abrasive or corrosive materials.
• Do not tamper with the unit’s internal components. This invalidates the warranty.
• Only use fresh batteries. Do not mix new and old batteries.
• Only use attachments/accessories specified by the manufacturer.
• Images shown in this manual may differ from the actual display.
• When disposing of this product, ensure it is collected separately for special treatment.
• Placement of this product on certain types of wood may result in damage to its finishing for which the manufacturer will not be responsible. Consult the furniture manufacturer’s care instructions for information.
• The contents of this manual may not be reproduced without the permission of the manufacturer.
• When replacement parts are required, be sure the service technician uses replacement parts specified by the manufacturer that have the same characteristics as the original parts.
• Unauthorized substitutions may result in fire, electric shock, or other hazards.
• Do not dispose of old batteries as unsorted municipal waste. Collection of such waste separately for special treatment is necessary.
• Please note that some units are equipped with a battery safety strip. Remove the strip from the battery compartment before first use.
• The technical specifications for this product and the contents of the user manual are subject to change without notice.
• Operating temperature: -10° to 50°
• CAUTION: Risk of explosion if the battery is replaced by an incorrect type.
• High or low extreme temperatures that a battery cannot be subjected to during use, storage, or transportation and low air pressure at high altitudes.
• Replacement of a battery with an incorrect type can defeat a safeguard.
• Disposal of a battery into a fire or a hot oven, or mechanically crushing or cutting of a battery, can result in an explosion.
• Leaving the battery in an extremely high temperature surrounding environment can result in an explosion or the leakage of flammable liquid or gas.
• A battery subjected to extremely low air pressure may result in an explosion or the leakage of flammable liquid or gas.
• An appliance is only suitable for mounting at a height ≤ 2m.

Introduction

• Thank you for selecting the Professional Rain Gauge Sensor.
• This device contains a wireless self-emptying rain collector for measuring rainfall and temperature and a display main unit.
• The wireless rain collector sensor is fully assembled and calibrated for easy installation. It transmits data by a low-power radio frequency to the display main unit up to 150m away (line of sight).
• The display main unit displays the rainfall and temperature data received from the sensor outside. It remembers the data over a time range for you to monitor and analyze the weather status for the past 24 hours.
• It has advanced features such as the Hi / Lo Alert alarm which will alert the user when the set high or low weather criteria are met. Time and date stamps are also provided for the corresponding maximum and minimum records for each weather detail.
• The system also analyzes the records for your convenience viewing, such as the display of total rainfall as well as indications in terms of rain rate, hourly, daily, weekly, monthly, and yearly records.
• With a radio-controlled/atomic clock feature built-in, the system is truly a remarkable personal Professional Rain Gauge for your backyard.
• Note: This instruction manual contains useful information on the proper use of this product. Please read this manual through to fully understand and enjoy its features.

Product Features

• Large backlight LCD unit
• Rain rate display
• Custom period, hourly, daily, weekly, monthly, and yearly rainfall display
• Data logger stores and gathered data to display rainfall according to your selected time scale (current status, past 24 hours, past 31 days, past 52 weeks, past 12 months, or past 5 years)
• Graphical histogram display to show the variation of rainfall pattern in your selected time-scale (current status, past 12 hours, past 12 days, past 12 weeks, or past 12 months at a time)
• SINCE function to display TOTAL rainfall from a customized commencing date
• Customized daily rainfall period
• Measures outdoor temperature and humidity at the same time as indoor temperature and humidity
• Heat Index and Dew Point display
• Real-time clock display with atomic radio-controlled function
• Up to 150 m sensor transmission range
• Data retention storage even during battery changes
• High / Low alert function
• Maximum/minimum memory function with time stamp
• Alarm function with the ice-alert function

Overview

Main Display Unit

1. LCD display: Displays current rainfall, total rainfall or rainfall history, In / outdoor temperature, In / outdoor humidity, and clock/calendar
2. Alert indicator: Blinking with alert alarm is on
3. [ HISTORY ]: Toggle to display rainfall in the past hour, day, week, month, or year
4. [ SINCE ]: Display total rainfall and the start day; hold to clear the previous rainfall start time and reset the counter to start again
5. [ RAIN ]: Toggle display mode to rainfall rate, hourly, daily, weekly, monthly, and yearly rainfall
6. [ MEM ]: To show maximum and minimum records with time stamps for temperature, humidity, and rainfall
7. [ CLOCK ] : Press and hold to enter the clock manual setting mode
8. [ ALARM ]: Press to on / off clock alarm to enable or disable the Hi / Lo alert settings
9. [ ALERT ]: Press to review the hi/lo alert value
10. Wall mounting hole
11. [ DOWN ]: T o decrease the current set value
12. [ UP ]: Toggle display mode to outdoor temperature, heat index, and dew point; to increase the current set value
13. Battery compartment
14. °C/°F switch: Change display in °C or °F
15. MM / IN switch: Change to display in MM or IN
16. RCC key: Press to enter RC reception mode
17. SCAN: Press to search for the wireless thermo-hygro rain gauge sensor
18. RESET: Restore factory settings
19. [ SNOOZE / LIGHT ]
20. Table stand

Wireless rain gauge sensor

1. Radiation shield (Thermo-hygro sensor casing built inside)
2. Red LED indicator
3. Mounting base
4. Mounting claim
5. Rain collector
6. Rain sensor
7. Tipping bucket
8. Drain holes
9. [ RESET ] key
10. Battery door

LCD display

Time and calendar display

1. SINCE icon: for total rainfall
2. HISTORY icon: for all records
3. Time
4. DST icon: Summertime
5. Ice pre-alert clock alarm
6. Day of the week
7. MAX / MIN indicator
8. Time alarm icon
9. Calendar

Rainfall display

1. Histogram
2. Past time
3. Rainfall indicator
4. Time range record indicator
5. Rainfall reading
6. HI alert and alarm
7. Rainfall unit (in/h / mm/h)

Outdoor temperature & humidity display

1. Outdoor signal strength indicator
2. Outdoor indicator
3. Outdoor humidity
4. Heat index / Dew point indicator
5. Outdoor temperature
6. Low battery indicator for sensor
7. Hi / Lo alert for outdoor humidity
8. Hi / Lo alert for outdoor temperature

Indoor temperature & humidity display

1. Indoor indicator
2. Comfort index
3. Indoor humidity
4. Indoor temperature
5. Low battery indicator for the main unit
6. Hi / Lo alert for indoor humidity
7. Hi / Lo alert for indoor temperature

Installation of wireless rain gauge sensor

Your wireless rain gauge sensor measures rainfall, temperature, and humidity for you. It’s fully assembled and calibrated for easy installation.

Battery and Installation

• Unscrew the battery door at the bottom of the unit and insert the new batteries according to the “+/-” polarity indicated. Screw the battery door compartment on tightly. Press the [ RESET ] key after each battery change.
• Note: The red LED will begin flashing every 12 seconds.

Mounting guidelines

1. Install the thermo-hydro rain gauge sensor in an open location with no obstructions above and around the sensor for accurate rain and temperature measurement.
2. Ensure the rain gauge is installed as level as possible to achieve accurate rain measurement.
3. The sensor and the main display unit should be positioned within an effective range of 150 m in an open area

Display main unit

Stand and battery installation

The unit is designed for desktop or wall mount for easy viewing.

1. Remove the battery door of the main unit.
2. Insert 2 new AA-size batteries according to the “ +/- ” polarity mark on the battery compartment.
3. Replace the battery door.
4. Once the batteries are inserted, all the segments of the LCD will be briefly lighted up before entering the automatic linking process with the remote sensor, as indicated by the flashing ” “.
5. Press the [ SCAN ] key if the is not flashing, to manually activate the linking process.
6. Press the [ RESET ] key at the bottom of the sensor. After successful linking with the sensor, the clock will automatically set its time by the Radio-controlled (RC) signal, as indicated by the .

Note:

• If no display appears on the LCD after inserting the batteries, press the [ RESET ] key by using a pointed object.
• In some cases, you may not receive the RC signal immediately due to the atmospheric disturbance.

The pairing of the wireless sensor with the display main unit

• After the insertion of batteries, the main display unit will automatically search and connect the wireless sensor (antenna blinking ).
• Once the connection is successful, the antenna mark and readings for outdoor temperature and rainfall will appear on the display.

Changing batteries of thermo-hygro rain gauge sensor

Whenever you change the batteries of the wireless sensor, pairing must be done manually.

1. Change the batteries to new ones.
2. Press the [ RESET ] key on the wireless sensor.
3. Press the [ SCAN ] key on the main display unit.

Note:

• Pressing the [ RESET ] key at the bottom of the wireless sensor will generate a new code for pairing purposes.
• Always dispose of old batteries in an environmentally safe manner.

Radio-controlled/atomic clock function

• This main unit is programmed to synchronize with Radio-controlled time signal.

Germany
MSF(UK)| Within 1500 km (932 miles) of Anthorn, England
US version| WWVB(US)| Within 3200 km (2000 miles) of Fort, Collins, Colorado

The unit synchronizes itself automatically to the RC signal daily. The icon will appear on the LCD upon successful synchronization each time.

Note:

• The strength of the radio-controlled time signal from the transmitter tower may be affected by geographical location or building.
• Always place the unit away from interfering sources such as TV sets, computers, etc.
• Avoid placing the unit next to metal plates.
• Closed areas such as airports, basements, tower blocks, or factories are not recommended.

Time setting

• The unit automatically set itself according to the radio-controlled clock signal it received.
• To set the clock/calendar manually in areas where reception of the signal is not permitted, users may first disable the reception by holding the [RCC] key for 8 seconds until the “OFF” icon displays on the clock.

To manually set the clock/time zone selection

• The setting mode can set the time, date, unit of measure, and other functions.
• Press and hold [CLOCK] for 2 seconds to enter the setting Mode. In setting mode, press  [CLOCK] to proceed to the next setting step.
• Press [UP] or [DOWN] to change the value. Press and hold the key for quick adjustment.

Please refer to the following setting procedures below:

to select 12 or 24 hour format
[ CLOCK ]| Time zone| Press [UP] or [ DOWN ] to select the time zone (US version only)
[ CLOCK ]| Hour| Press [UP] or [ DOWN ] to adjust the hour
[ CLOCK ]| Minute| Press [UP] or [ DOWN ] to adjust the minute
[ CLOCK ]| Year| Press [UP] or [ DOWN ] to adjust the year
[ CLOCK ]| M-D D-M| Press [UP] or [ DOWN ] to select the “Month / Day” or “Day / Month” display format
[ CLOCK ]| Month| Press [UP] or [ DOWN ] to adjust the month
[ CLOCK ]| Day| Press [UP] or [ DOWN ] to adjust the day
[ CLOCK ]| Weekday language| Press [UP] or [ DOWN ] to select a weekday display language
[ CLOCK ]| DST Auto / off| Press [UP] or [ DOWN ] to select DST Auto / off mode
[ CLOCK ]| Exit setting|

Note:

• The unit will automatically exit the setting if no key is pressed in 60 seconds.
• The time zone setting is only for the US version where the unit receives the WWVB signal. Users can select PST, MST, CST, EST, AST, or NST.
• The hour offset is for DCF(German), MSF(UK) version and Australian versions. Its range is between -23 and +23 hours.
• The language options are English (EN), French (FR), German (DE), Spanish (ES), Italian (IT), Dutch (NL) and Russian (RU).
• DST (Daylight Saving Time) feature is set to Auto (factory set). The clock has been programmed to automatically adjust its time forward by one hour when the daylight saving time (DST) is in effect.
• Users can set the DST to OFF to disable the feature.

Disable / enable RCC signal reception

1. Press and hold the [RCC] key for 8 seconds to disable the reception.
2. Press and hold the [RCC] key for 8 seconds to enable automatic RCC reception.

To turn on / off the alarm clock (with ice-alert function)

1. Press the [ALARM] key at any time to show the alarm time.
2. Press the [ALARM] key to activate the alarm.
3. Press the [ALARM] key again to activate the alarm with the ice-alert function.
4. To disable the alarm, press until the alarm icon disappears.

To set the alarm time

1. Press and hold the [ALARM] key for 2 seconds to enter alarm setting mode. HOUR will begin flashing.
2. Use the [UP] or [DOWN] key to adjust HOUR, and press the [ALARM] key to proceed to set MINUTE.
3. Repeat 2 above to set MINUTE, then press the [ALARM] key to exit.

Note:

• Once the alarm time is set, the alarm function will be activated automatically.
• Pressing the [ALARM] key twice when an alarm time is being displayed will activate the temperature-adjusted pre-alarm.
• The alarm will sound 30 minutes earlier if it detects an outside temperature below -3°C.

Rainfall

The device displays how many millimeters/inches of rainfall are accumulated over some time, based on current rainfall and rain rate that is updated every minute.

To select the rain display mode

Press the [RAIN] key to toggle between.

Graphical Histogram Display

• A histogram presents an easy view of rainfall change patterns over a while in a graphical manner.
• The time scale of the graph automatically changes according to the rainfall display modes.

Note:

• By default, the graph is presented on an Hourly scale when rainfall is in the Rain Rate.
• There is no graphical display when Yearly Rainfall is selected.

Total rainfall SINCE function

• Press the [SINCE] key to display the total rainfall record. The commencing date and year will be shown.
• To clear the existing commencing date and reset it to re-start again, press and hold [SINCE] until the record is cleared.
• The total rainfall will now be equal to the Day rainfall of today and the unit will start again to collect the rainfall data.

To select the measurement unit for the rainfall

1. Slide the [MM / IN] switch to position to select a millimeter unit.
2. Slide the [MM / IN] switch to position to select the inch unit.

Customized daily rain

Instead of clearing rainfall at midnight, a user may customize the clearing time.

1. Press and hold [RAIN] for 2 seconds to enter the setting.
2. Press [UP] or [DOWN] to toggle between OFF and ON, followed by [RAIN].
3. Press [UP] or [DOWN] to set the daily rainfall cleaning time, between 1:00 am to 11:00 pm, followed by [RAIN] to confirm and exit the setting.

History data of all record

Data logger stores and gathers data to display historical rainfall according to your selected time scale (e.g. up to the past 24 hours, past 31 days, past 52 weeks, past 12 months, or past 5 years)

To check history data:

1. Press the [ RAIN ] key to select rainfall display modes.
2. Press the [ HISTORY ] key repeatedly to read the data for each period of the time scale selected backward.

When the HOUR time scale is selected, the LCD will display the past indoor temperature & humidity, and outdoor temperature, for each hour on the hour simultaneously for the past 24 hours.

Note:

The main unit can check the records according to the time and calendar of the clock, i.e. it can display the records of the past, but not any records in the future.
E.g. The main unit recorded data from Jan. 1st, 2012 to Feb. 31st, 2014. If the time is changed to Jan. 1st, 2013, then only data in 2012 can be displayed.

Temperature & humidity display

• The main display unit displays outdoor temperature and humidity received from the wireless Thermo-Hygro Rain Gauge sensor, as well as indoor temperature and humidity from the built-in sensors.
• Users may select a temperature unit by sliding the [ °C / °F ] switch.

To view the Heat Index and Dew Point

1. Press [ UP ] to view the Heat Index and Dew Point.
2. Press and hold [ UP ] for 2 seconds for auto loop.

Comfort indication

The comfort indication is a pictorial indication based on indoor air temperature and humidity in an attempt to determine comfort level.

Maximum/minimum memory function

To Check the Memory:

Press the [ MEM ] key repeatedly to check the maximum/minimum records.

Area| Outdoor Temperature| Outdoor Humidity| Heat Index| Dew point| Indoor Temperature| Indoor Humidity| Hour/Day/Week/ Month/Year rainfall
---|---|---|---|---|---|---|---
Type of memory| Max. Min.| Max. Min.| Max.| Max. Min.| Max. Min.| Max. Min.| Max.

• Note: When the maximum or minimum reading is displayed, the corresponding time and date stamp will be shown.

To clear individual records

• While displaying the maximum/minimum records, press and hold the [ MEM ] key for 2 seconds to clear the individual record.

Hi / Lo alert

HI/LO are used to alert the users of certain weather conditions. Once activated, the alarm will turn on and a red LED starts flashing when a certain pre-set criterion is met. The following are areas and types of alerts provided.

To set the Hi / Lo alert

1. Press the [ ALERT ] key until the desired area is selected.
2. Use the [UP] / [DOWN] keys to adjust the setting.
3. Press the [ALERT] key to confirm and continue to the next setting.

To enable/disable the Hi / Lo alert

1. Press the [ALERT] key until the desired area is selected.
2. Press the [ALARM] key to turn the alert on or off.
3. Press the [ALERT] key to continue to the next setting.

Note:

1. The unit will automatically exit setting mode in 60 seconds if no key is pressed.
2. When the alert alarm is on, the alert LED indicator, the area, and the type of alarm that triggered the alarm will be flashing and the alarm will sound for 2 minutes.
3. To silence the alert alarm beeping, press the [SNOOZE / LIGHT] key, or let the beeping alarm automatically turn off after 2 minutes.

Wireless signal reception

• The wireless sensor is capable of transmitting data over an approximate operating distance of 150m range (line of sight).
• Occasionally, due to intermittent physical obstruction or other environmental interference, the signal may be weakened or lost.
• In the case that the sensor signal is lost completely, you will need to relocate the display main unit or the wireless sensor closer to each other.

Data clearing

• During the installation of the wireless sensor, the sensor was likely to be triggered, resulting in erroneous rainfall measurements.
• After the installation, the user may clear out all the erroneous data from the Display Main Unit, without needing to reset the clock and re-establish pairing.

1. Press and hold the [HISTORY] key for 8 seconds.
2. Press the [UP] or [DOWN] key to choose “YES” or “NO”.
3. Press the [HISTORY] key to confirm. This will clear out any rainfall data recorded before.

Maintenance of rain gauge

1. Rotate the rain collector in the anticlockwise direction.
2. Gently remove the rain collector.
3. Clean and remove any debris or insects.

Troubleshooting

Specifications

Main unit

General specification

Dimensions| 95 x 155 x 23 mm (W x H x D)
Weight| 212g without batteries
Battery| 2 x AA size 1.5V batteries (Alkaline recommended)
Support channels| Wireless sensor (Rain gauge, thermal sensor)
Operating

temperature range

| -5°C to 50°C (-40°F to 140°F)
Operating humidity

range

| RH 10% to 90 % non-condensing
Radio-controlled/atomic   clock
Synchronization| Auto or disabled
Clock display| HH: MM / Weekday
Hour format| 12hr AM/PM or 24hr
Calendar| DD / MM / YR or MM / DD / YR
Weekday| 7 languages: EN, FR, DE, ES, IT, NL, RU
Time signal| DCF, MSF, WWVB (Factory set)
Time zone| PST, MST, CST, EST, AST, NST (WWVB version only)
Hour offset| -23 to +23 hours (DCF / MSF / Australian versions)
DST| AUTO / OFF
Indoor temperature

Temperature unit| °C or °F
Displayed range| -40°C to 70°C (-40°F to 158°F) (< -40°C: LO; > 70°C: HI)
Operating range| -10°C to 50°C (14°F to 122°F)
Resolution| 0.1°C or 0.1°F
Accuracy| +/- 1°C or 2°F typical @ 25°C (77°F)
Indoor humidity
Displayed range| 20% to 90% RH (< 20%: LO; > 90%: HI) (Temperature between 0°C to

60°C)

Operating range| 20% to 90%RH
Resolution| 1%

Accuracy

| ±8%RH (20~39% RH) (@25°C)

±5%RH (40~70% RH) (@25°C)

±8%RH (71~90% RH) (@25°C)

Outdoor temperature
Temperature unit| °C or °F
Resolution| °C / °F (1 decimal place)
**** Accuracy| 0.1 ~ 60°C ± 0.4°C (32.2 ~ 140°F ± 0.7°F)

-19.9 ~ 0°C ± 0.7°C (-3.8 ~ 32°F ± 1.3°F)

-40 ~ -20°C ± 1°C (-40 ~ -4°F ± 1.8°F)

Outdoor humidity
Humidity unit| %
*** Accuracy| 1 ~ 9% RH ± 5% RH @ 25°C (77°F)

10 ~ 90% RH ± 3.5% RH @ 25°C (77°F)

91 ~ 99% RH ± 5% RH @ 25°C (77°F)

Resolution| 1%
Rain gauge
Unit for rainfall| in and mm
Range for rainfall| 0~29999 mm (max)
Resolution| 0.01” (0.254 mm)
Accuracy| < 0.01” (0.2 mm): +/- 7% or 1 tip; 5” (127 mm): +/- 7%
Hi display| Hour rainfall > 999.9 mm; Day rainfall > 9999 mm; Week/Month/Total rainfall

29999 mm

Wireless rain gauge sensor

recommended)
Frequency| 868 MHz (European) / 915 MHz (US) / 917 MHz (Australian)
Transmission interval| Every 12 seconds
Operating temperature range| -40°C to 60°C (-40°F to 140°F)
Operating humidity range| RH 1% to 99 % non-condensing

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. this device may not cause harmful interference,
2. this device must accept any interference received, including interference 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, under 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 under 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 to 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.

FCC RF Radiation Exposure Statement

Caution: To maintain compliance with the FCC’s RF exposure guidelines, place the unit at least 20cm from nearby persons.

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