1. Pambuka
The Pymeter Thermostat Controller PY-21TS is a dual-relay temperature control device designed for precise temperature management. It allows for simultaneous control of heating and cooling equipment, making it suitable for a wide range of applications including seedling germination, greenhouse temperature regulation, reptile terrariums, fermentation, and more. This manual provides essential information for the safe and effective operation of your device.
2. Informasi Safety
- Wacanen kabeh pandhuan kanthi tliti sadurunge ngoperasikake piranti kasebut.
- Do not immerse the controller unit or the temperature probe in water or other liquids.
- Priksa manawa sumber daya voltage matches the device's requirements (120V AC).
- Do not exceed the maximum output load of 1200W (10A) for the combined outlets.
- Supaya piranti adoh saka bocah lan kewan.
- Pedhot daya sadurunge ngresiki utawa nindakake pangopènan.
3. Fitur Produk
- Kontrol suhu: Allows presetting of temperatures to automatically activate heating and cooling equipment.
- Dual Relay System: Supports simultaneous connection and control of both heating and cooling devices.
- Jendela Tampilan Ganda: Shows both the measured (PV) and set (SV) temperatures concurrently. Supports both Celsius (°C) and Fahrenheit (°F) display.
- Alarm Device: Features a beeping alarm for high temperature conditions or sensor failure, enhancing safety.
- Plug lan Play: Designed for easy setup and operation across various settings and devices.
- Higher Power Output: Maximum output load of 1200W (10A).
- Fungsi Lanjut: Includes temperature calibration and a power-on delay function to prevent frequent compressor cycling.
- Aplikasi serbaguna: Ideal for heat mats, heat lamps, heating pads for reptile terrariums, aquarium heaters/chillers, greenhouses, grow tents, breeding, seedling, and fermentation processes.
4. Isi Paket
- 1 x Pymeter Thermostat Controller PY-21TS
- 1 x Probe Suhu
- 1 x User Manual (dokumen iki)

Image: Pymeter Thermostat Controller PY-21TS with its temperature probe and power cord.
5. Setup
- Connect the Temperature Probe: Insert the metal tip of the temperature probe into the designated port on the side of the controller. Ensure it is securely connected.
- Uripake Kontroler: Plug the controller's power cord into a standard 120V AC electrical outlet. The display will illuminate, showing the current temperature (PV) and the set temperature (SV).
- Sambungake piranti: Plug your heating device into one of the outlets (OUT 1 or OUT 2) and your cooling device (if applicable) into the other. The controller can manage both simultaneously.

Image: The Pymeter controller connected to a heat mat for seedling germination, illustrating a typical setup.
6. Instruksi Operasi
6.1 Pangertosan Tampilan
Kontroler nduweni tampilan dual:
- PV (Nilai Proses): Displays the current measured temperature from the probe.
- SV (Nilai Setel): Displays the target temperature or the ON/OFF temperature settings.
6.2 Setting Temperature (Heating Mode)
In heating mode, the device turns ON when the temperature drops below the ON-Temperature and turns OFF when it reaches the OFF-Temperature. For heating, the ON-Temperature must be set NGENDUR than the OFF-Temperature.
- Tekan ing SET button once. The ON-Temperature (e.g., '1oN' for Outlet 1) will flash.
- Gunakake ing UP or TURUN arrows to adjust the desired ON-Temperature.
- Pencet SET again. The OFF-Temperature (e.g., '1oF' for Outlet 1) will flash.
- Gunakake ing UP or TURUN arrows to adjust the desired OFF-Temperature.
- Tekan ing SIMPAN button to confirm and save your settings.
Example: For heating, if you set ON-Temp to 70°F and OFF-Temp to 75°F, the heater will turn on at 70°F and turn off at 75°F.
6.3 Setting Temperature (Cooling Mode)
In cooling mode, the device turns ON when the temperature rises above the ON-Temperature and turns OFF when it reaches the OFF-Temperature. For cooling, the ON-Temperature must be set luwih dhuwur than the OFF-Temperature.
- Follow steps 1-4 from the Heating Mode instructions to adjust ON-Temperature and OFF-Temperature.
- Ensure the ON-Temperature is set luwih dhuwur than the OFF-Temperature for cooling operation.
- Tekan ing SIMPAN button to confirm and save your settings.
Example: For cooling, if you set ON-Temp to 80°F and OFF-Temp to 75°F, the cooler will turn on at 80°F and turn off at 75°F.
6.4 Pemilihan Unit Suhu (°C/°F)
To switch between Celsius and Fahrenheit, press and hold the UP arrow button for approximately 3 seconds. The display will change units accordingly.
6.5 Kalibrasi Suhu
The Pymeter controller is factory-calibrated for accuracy. If you suspect an inaccurate reading, you can perform a calibration using an ice-water mixture. An ice-water mixture (melting ice) should read 32°F (0°C).
- Place the temperature probe into a mixture of ice and water, ensuring the ice is melting.
- Allow a few minutes for the probe to stabilize. The reading should be 32°F or 0°C.
- If the reading is off, consult the full manual for specific calibration steps, which typically involve an offset adjustment in the settings menu.
6.6 Power-On Delay Function
This function prevents rapid cycling of compressors (e.g., in chillers) by introducing a delay before restarting after a power interruption or temperature change. This protects the equipment and extends its lifespan. The delay time can usually be adjusted in the advanced settings.
6.7 Setelan weker
The controller can be configured to sound an alarm if the temperature exceeds or falls below a set range, or if the sensor malfunctions. Refer to the detailed manual for specific steps to set high/low temperature alarm thresholds and enable/disable the sensor fault alarm.

Image: The Pymeter controller regulating temperature in a greenhouse, connected to both a space heater and an exhaust fan.

Image: The Pymeter controller providing temperature regulation for a reptile terrarium, connected to a heat lamp and a heating mat.
7. Pangopènan
- Reresik: Wipe the controller's exterior with a soft, dry cloth. Do not use abrasive cleaners or immerse in water.
- Perawatan Probe: Keep the temperature probe clean and free from debris. Avoid bending or damaging the probe cable.
- Panyimpenan: Simpen piranti ing panggonan sing adhem lan garing nalika ora digunakake, adoh saka sinar srengenge langsung lan suhu sing ekstrem.
- Priksa sambungan: Periodically inspect all electrical connections for wear or damage.
8. Ngatasi masalah
| Masalah | Kemungkinan Penyebab | Solusi |
|---|---|---|
| Piranti ora urip. | No power to the outlet; loose power cord. | Check the power outlet with another device. Ensure the controller's power cord is fully inserted. |
| Appliance (heater/cooler) not activating. | Incorrect ON/OFF temperature settings; appliance not plugged in or faulty. | Verify ON-Temp and OFF-Temp settings are correct for heating/cooling mode. Ensure appliance is properly plugged into the controller and is functional. |
| Maca suhu sing ora akurat. | Sensor dirty or damaged; need for calibration. | Clean the sensor. Perform temperature calibration using an ice-water mixture (refer to section 6.5). |
| Alarm beeping continuously. | Temperature outside set alarm limits; sensor fault. | Check the current temperature and compare it to your alarm settings. Inspect the sensor connection and cable for damage. |
9. Spesifikasi
- Model: PY-21TS
- Voltage: 120 Volt AC
- Beban Output Maksimum: 1200W (10A)
- Operating Temperature (Device): Nganti 210°F (99°C)
- Ukuran produk: 8.26"P x 2.16"L x 1.57"T (210mm x 55mm x 40mm)
- Bobot barang: 16 ons (1 pon)
- Tipe tampilan: LCD utawa LED
- warna: Putih
10. Warranty lan Dhukungan
Pymeter products are designed for reliability and performance. For specific warranty details, technical support, or service inquiries, please refer to the warranty card included with your purchase or visit the official Pymeter website. Please have your model number (PY-21TS) and purchase information ready when contacting support.