Introduction
The D211Z Digital Wireless Refrigerator Thermometer & Hygrometer is designed to provide accurate temperature and humidity readings for both indoor and outdoor environments. This system includes a main receiver unit with a large display and two wireless transmitter units. It features customizable high/low temperature alarms, records of maximum and minimum values, a backlight function, and a low battery alert, making it ideal for monitoring refrigerators, freezers, cold storage, incubation rooms, and general household use.
Package Contents
- Receiver Unit x1
- Transmitter Unit x2
- English-Chinese-German Manual x1
- PE Bag x3
- Colour Box x1
Setup Guide
1. Power Supply
- Receiver: Can be powered by a DC power cable (not included) or 2 AAA batteries (not included).
- Transmitters: Each transmitter requires 2 AAA batteries (not included).
Note: Batteries are not included in the product shipment. Ensure correct polarity when inserting batteries.
2. Placement Options
The receiver unit offers versatile placement options:
- Stand-up: Utilize the integrated support stand on the back for desktop placement.
- Wall-mounting: Use the wall-mounting holes on the back to hang the unit.
- Magnetic attachment: A magnet on the back allows for attachment to metallic surfaces like refrigerators.
The transmitter units also feature wall-mounting holes on their backs for secure placement in desired monitoring locations.
For optimal wireless transmission, ensure the transmitters are within 100 meters of the receiver in open areas. Obstructions like thick walls or metal objects may reduce the effective range.
Operating Instructions
1. Display Overview
The main receiver unit displays indoor temperature and humidity, along with readings from the two wireless channels (CH1 and CH2). It also shows maximum (MAX) and minimum (MIN) recorded values for the last 24 hours.
2. Temperature Unit Switching
Press the designated button (refer to the manual for exact button) to switch between Celsius (°C) and Fahrenheit (°F) temperature units.
3. Backlight Function
Activate the backlight for improved visibility in low-light conditions. The backlight button is typically indicated by a light bulb icon.
4. Max/Min Value Records
The device automatically records the maximum and minimum temperature and humidity values over a 24-hour period. These values are displayed on the screen.
5. High/Low Temperature Alarm Function
Set custom upper and lower temperature limits for each channel. If the temperature exceeds or falls below these limits, an alarm will sound, and the display may change color (e.g., to red) to indicate an overlimit condition.
6. Low Battery Alert
An icon will appear on the display to indicate when the batteries in either the receiver or transmitters are running low and need replacement.
Maintenance
- Clean the device regularly with a soft, dry cloth. Do not use abrasive cleaners or immerse the units in water.
- Replace batteries promptly when the low battery indicator appears to ensure continuous and accurate readings.
- Store the device in a dry environment when not in use for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display on receiver or transmitters | Dead or incorrectly inserted batteries; no DC power. | Replace batteries, ensuring correct polarity. Connect DC power cable if applicable. |
| No outdoor temperature/humidity reading (CH1/CH2) | Transmitter out of range; interference; dead transmitter batteries. | Move transmitter closer to receiver. Check for obstructions. Replace transmitter batteries. |
| Alarm not sounding or incorrect | Alarm limits not set correctly; alarm function turned off. | Review and adjust high/low temperature alarm settings. Ensure alarm notification icon is enabled. |
| Inaccurate readings | Sensor obstruction; extreme environmental conditions; low battery. | Ensure sensors are not blocked. Replace batteries. Allow device to stabilize in new environment. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | D211Z |
| Product Type | THERMOMETERS, Household Thermometers |
| Thermometer Use | Refrigerator Thermometers |
| Thermometer Type | Digital |
| Indoor Temperature Range | -9.9°C to 60°C (-14.2°F to 140°F) |
| Indoor Humidity Range | 10% to 99% RH |
| Outdoor Temperature Range | -40°C to 60°C (-40°F to 140°F) |
| Wireless Transmission Distance | 100 meters (in open areas) |
| Screen Size | 3.42 inches |
| Housing Material | ABS Plastic |
| Receiver Power Supply | DC power cable / 2 AAA batteries (not included) |
| Transmitter Power Supply | 2 AAA batteries (not included) |
| Receiver Dimensions (L x W x H) | 8.2 x 2.1 x 8.2 cm |
| Transmitter Dimensions (L x W x H) | 5.2 x 2 x 7.5 cm |
| Receiver Weight | 93g |
| Transmitter Weight | 33g |
| Origin | Mainland China |
Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or refer to the specific warranty documentation provided at the time of purchase. Keep your purchase receipt as proof of purchase.
