Temperature
Scale: Celsius
Tolerance: Less than ± 0.5 ºC at 25 ºC
Sampling Rate: Every 15 seconds
Display Range: 0.0 ºC to + 45.0 ºC
Display Resolution: 0.5 ºC
Set Temperature Range: 5.0 ºC to + 35 ºC
Resolution: 0.5 ºC
Power Supply – Thermostat
Power Source: 2 x AA alkaline batteries
(Don’t use rechargeable batteries)
Battery Life: Approximately 1 year
Control
Control Method: 1. On – Off control 2. PWM control
Memory Backup
Type: Electrically Erasable Programmable Read Only Memory (EEPROM)
Radio Frequency (RF) Settings
Operating Frequency: 868 MHz
Max. Operating Range: 100 metres (free air) 30 metres (indoors)
Protection rating: IP30
Environment
Operating Temperature: 0 ºC to +50 ºC
Storage Temperature: -20 ºC to +60 ºC
ST621TX INSTRUCTION MANUAL
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