PROTMEX PT20C - User Manual

PT20C Weather Station Clock
WWVB RCC/NO RCC Version
User Manual

Summary

Functional Overview

Temperature and Humidity Measurement

Details measurement ranges and supported units for temp, humidity, and air pressure.

Weather Forecast and Moon Phase

Explains weather prediction icons and the monthly moon phase display feature.

Alarm Clock and Timekeeping

Covers perpetual calendar, multi-time zones, and personalized alarm clock settings.

RCC and WWVB Functionality

Describes RCC reception for time synchronization and multi-time zone support.

Power Supply and Sensor Connectivity

Specifies battery types and power input options for the receiver and sensor.

Appearance and Screen Display

Receiver Overview

Describes the physical layout, buttons, ports, and battery compartment of the main unit.

Temperature Humidity Sensor

Details the physical components of the wireless outdoor sensor, including its screen and controls.

LCD Display Elements

Explains the various icons, readings, and indicators shown on the main unit's LCD screen.

Power On & Reset

Setup & Operation

Key Operations and Modes

Details the functions of different buttons and operating modes for setup and control.

Time Setting Procedure

Step-by-step guide for setting the current time, date, and other time-related parameters.

Alarm Setting Procedure

Instructions for configuring alarm times, repeat modes, and alarm volume.

Outdoor Temperature Alarm Settings

How to enable, disable, and set upper/lower limits for the outdoor temperature alarm.

Function & Effect Description

RCC Receiving Function

Explains the automatic reception of radio-controlled clock signals for accurate timekeeping.

RF Function

Details the wireless radio frequency communication between the receiver and outdoor sensor.

Alarm Function Details

Describes alarm duration, snooze function, and the maximum number of alarms.

Temperature Measurement Function

Covers indoor/outdoor temperature ranges, error margins, and detection cycles.

Outdoor Temperature Alarm

Explains default alarm values, sound, and how to manage the outdoor temperature alert.

Indoor Comfort Levels

Defines comfort states (Comfortable, Dry, Wet) based on indoor humidity ranges.

Frost Alarm Function

Details the conditions and display icon for the frost alarm feature.

Heat Index and Dew Point

Provides data on heat index and dew point temperature relationships and warnings.

Moon Phase Display

Illustrates the moon phase icons and their corresponding names.

Weather Forecast Icons

Explains the screen display icons used for various weather forecast conditions.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The PT20C Weather Station Clock is a versatile device available in WWVB RCC/NO RCC versions, designed to provide comprehensive environmental monitoring and timekeeping functionalities. This user manual outlines its features, specifications, and operational procedures.

Function Description

The PT20C Weather Station Clock offers a wide array of functions, including:

• Perpetual Calendar: Displays the date, day of the week, and moon phase.
• RCC Function (RCC Version Only): Automatically receives time signals (WWVB) for accurate timekeeping and supports multiple US time zones (EST, CST, MST, PST).
• Multi-time Zone Clock (WWVB Version Only): Supports US time zones.
• Weekly Display: Supports 7 languages: English, German, Italian, French, Spanish, Dutch, and Danish.
• Personalized Alarm Clock: Allows setting alarms for weekdays, weekends, or every day, with a snooze function.
• Moon Phase Display: Automatically calculates and displays the moon phase based on the calendar (northern hemisphere image).
• Weather Forecast: Provides weather predictions with various icons for sunny, partly cloudy, cloudy, rainy, thunder shower, snowy, and heavy snow.
• Temperature and Humidity Measurement: Measures both indoor and outdoor temperature and humidity, supporting Celsius and Fahrenheit units.
• Temperature Measurement Range:
  • Receiver: -9.9°C to 50°C (14.2°F to 122°F). Displays "HH.H" for temperatures above 50°C and "LL.L" for temperatures below -9.9°C.
  • Wireless Sensor: -40°C to 70°C (-40°F to 158°F). Displays "HH.H" for temperatures above 70°C and "LL.L" for temperatures below -40°C.
• Humidity Measurement Range:
  • Receiver and Sensor: 20-99%. Displays "HH" for humidity above 99% and "LL" for humidity below 20%.
• Air Pressure Measurement: Range of 800-1100 hPa with an error range of ±2hPa. Supported units include hPa, mb, inHg, and mmHg.
• Data Trend Display: Shows trends for indoor and outdoor temperature, humidity, and air pressure.
• Max/Min Records: Records maximum and minimum temperature and humidity.
• Dew Point Temperature: Calculates and displays dew point.
• Frost Alarm: Alerts when channel 1 temperature is between -2°C and 3°C.
• Temperature Alarm: Allows setting upper and lower limits for temperature alarms.
• Heat Index: Calculates and displays the heat index, providing warnings for potential heat-related health risks.
• Indoor Comfort Graded Expressions: Displays comfort levels based on indoor temperature and humidity (Comfortable: 40-69% RH, Dry: ≤39% RH, Wet: ≥70% RH).
• Multi-Sensor Connectivity: The PT20C receiver can connect to up to 3 signal sensors simultaneously, displaying data from each in a carousel mode.
• Low Battery Alarm: Alerts when batteries are low for both the receiver and sensors.
• LCD Backlight: Provides illumination for easy viewing.

Important Technical Specifications

• Power Supply:
  • Receiver: 3 x AAA (LR03) batteries or DC 5V power input.
  • Wireless Sensor: 2 x AAA (LR03) batteries.
• Temperature Units: Celsius (°C) and Fahrenheit (°F).
• Air Pressure Units: hPa, mb, inHg, mmHg.
• Calendar Range: 2020-2099.
• Alarm Duration: 2 minutes.
• Snooze Duration: 5 minutes.
• Maximum Alarms: 5.
• Indoor Temperature Detection Cycle: 30 seconds.
• Outdoor Temperature and Humidity Transmission Cycle:
  • Channel 1: Every 93 seconds.
  • Channel 2: Every 97 seconds.
  • Channel 3: Every 101 seconds.
• Temperature Error Range: ±1°C.
• Humidity Error Range: ±5%.
• RCC Receiving Time: Approximately 3-8 minutes.
• Daily RCC Automatic Receiving Times: 1:03, 2:03, 3:03 (mandatory); 4:03, 5:03 (selection).

Usage Features

• Initial Power-On/Reset: Upon power-on or reset, the device displays a full screen for 3 seconds with backlight on, emits a beep, and then shows real-time indoor temperature and humidity. It automatically enters RF signal receiving mode to connect to sensors and RCC search mode (for RCC versions).
• Time Setting: Long press "TIME" for 2 seconds to enter time setting mode. Use "▲/RF" to advance and "▼/MEM" to go back. Settings are saved after 20 seconds of inactivity.
• Alarm Setting: Long press "ALARM" to enter alarm setting mode. Set alarm time and repeat mode (Daily, Mon-Fri, Sat-Sun).
• Outdoor Temperature Alarm Setting: Long press "ALERT" to set upper and lower temperature limits for outdoor alarms.
• Backlight Control:
  • With battery power: Backlight highlights for 30 seconds after power-on/reset or when touched.
  • With power adapter: Backlight remains bright. Touch "SNOOZE/LIGHT" to switch between "strong," "weak," and "off" brightness levels.
• RCC Functionality (RCC Version Only):
  • Automatic reception after power-on/reset.
  • Manual entry by long pressing "SNOOZE/LIGHT."
  • Stop reception by long pressing "SNOOZE/LIGHT" during reception.
  • RCC symbol flashes during reception and is continuously displayed upon successful reception.
• RF Functionality:
  • Automatic RF reception for 3 minutes after battery installation.
  • Long press "▲/RF" in standard mode to clear outdoor channel data and re-receive signals.
• Max/Min Temperature and Humidity: Long press "▼/MEM" to clear memory values. Memory values are also cleared daily at 0 o'clock.
• Heat Index and Dew Point: Single press "HI/DP" to cycle between heat index and dew point display.

Maintenance Features

• Battery Replacement: Replace AAA batteries in both the receiver and wireless sensors when the low battery alarm is displayed.
• Signal Loss: If a sensor signal is lost for 60 minutes, the CH temperature display will show "--.-". The display will be restored once the signal is received again.
• Alarm Exit: Press any key (except "SNOOZE/LIGHT" during an active alarm) to exit the alarm.
• Setting Exit: Settings are automatically saved and exited after 20 seconds of inactivity in any setting mode.

PROTMEX PT20C Specifications

General

Brand	PROTMEX
Model	PT20C
Category	Clock
Language	English