1. Uvod
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. Sigurnosne informacije
- Prije rada s uređajem pažljivo pročitajte sve upute.
- Do not immerse the controller unit or the temperature probe in water or other liquids.
- Provjerite je li napajanje voltage matches the device's requirements (120V AC).
- Do not exceed the maximum output load of 1200W (10A) for the combined outlets.
- Držite uređaj podalje od djece i kućnih ljubimaca.
- Isključite napajanje prije čišćenja ili bilo kakvog održavanja.
3. Značajke proizvoda
- Kontrola temperature: 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.
- Prozor s dva zaslona: 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 and Play: Designed for easy setup and operation across various settings and devices.
- Higher Power Output: Maximum output load of 1200W (10A).
- Napredne funkcije: Includes temperature calibration and a power-on delay function to prevent frequent compressor cycling.
- Svestrane primjene: Ideal for heat mats, heat lamps, heating pads for reptile terrariums, aquarium heaters/chillers, greenhouses, grow tents, breeding, seedling, and fermentation processes.
4. Sadržaj paketa
- 1 x Pymeter Thermostat Controller PY-21TS
- 1 x Sonda za temperaturu
- 1 x Korisnički priručnik (ovaj dokument)

Image: Pymeter Thermostat Controller PY-21TS with its temperature probe and power cord.
5. Postavljanje
- 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.
- Uključivanje kontrolera: 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).
- Povežite uređaje: 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. Upute za rad
6.1 Razumijevanje zaslona
The controller features a dual display:
- PV (Vrijednost procesa): Displays the current measured temperature from the probe.
- SV (Postavljena vrijednost): 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 DONJI than the OFF-Temperature.
- Pritisnite tipku SET button once. The ON-Temperature (e.g., '1oN' for Outlet 1) will flash.
- Koristite UP or DOLJE arrows to adjust the desired ON-Temperature.
- Pritisnite SET again. The OFF-Temperature (e.g., '1oF' for Outlet 1) will flash.
- Koristite UP or DOLJE arrows to adjust the desired OFF-Temperature.
- Pritisnite tipku UŠTEDJETI 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 VIŠI 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 VIŠI than the OFF-Temperature for cooling operation.
- Pritisnite tipku UŠTEDJETI 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 Odabir temperaturne jedinice (°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 Kalibracija temperature
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 Postavke alarma
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. Održavanje
- Čišćenje: Wipe the controller's exterior with a soft, dry cloth. Do not use abrasive cleaners or immerse in water.
- Njega sonde: Održavajte temperaturnu sondu čistom i bez ostataka. Izbjegavajte savijanje ili oštećenje kabela sonde.
- Skladištenje: Uređaj čuvajte na hladnom i suhom mjestu kada se ne koristi, dalje od izravne sunčeve svjetlosti i ekstremnih temperatura.
- Provjera veze: Periodically inspect all electrical connections for wear or damage.
8. Rješavanje problema
| Problem | Mogući uzrok | Otopina |
|---|---|---|
| Uređaj se ne uključuje. | 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. |
| Netočno očitavanje temperature. | 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. Specifikacije
- Model: PY-21TS
- Voltage: 120 V AC
- Maksimalno izlazno opterećenje: 1200 W (10A)
- Operating Temperature (Device): Do 210°F (99°C)
- Dimenzije proizvoda: 8.26"D x 2.16"Š x 1.57"V (210 mm x 55 mm x 40 mm)
- Težina artikla: 16 unci (1 funta)
- Vrsta zaslona: LCD ili LED
- Boja: Bijela
10. Jamstvo i podrška
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.