Oiled Transformer Hot-spot Temperature Monitor W28

• LCD touch screen display；
• Automatic diagnosis and evaluation of sensor working status；
• Closed loop control, always working in the optimal state；
• GaAs material properties and internal self-calibration algorithm, no drift in life-time；
• 4-20mA or 0-5V analog output optional;
• 8 C-type relays and 1 system relay; 
• Simultaneous output available of RS-485 signal, LAN and analog.

• Channels: CH2-CH8(Optional)
• Temperature range: -40°C to 250°C
• Temperature accuracy: ±1 °C （full scale +/-1%）
• Resolution ratio: 0.1 °C 
• Sampling frequency (per channel): 250ms
• Light source life: >30 years
• Hardware interface: DC/24V input*1

                                           Optic port*X（X is channel count）

                                           USB*1

                                           LAN*1

                                           Analog port*X（Optional）

                                           RS-485*1

                                           Relay*9（C-type*1+system relay*1）

• Communication protocol: Modbus (ASCII/RTU)

                                                  Modbus（TCP-IP）

                                                  IEC61850（optional）

• Storage: 2GB
• Relay rated load: 8A at 250 VAC

                                       5A at 30 VDC

• Automatic calibration: based on internal temperature compensation
• Automatic diagnosis: Light value
• Display screen: LCD touch screen
• Power: DC/24V

             (Power conversion module provided in the protective housing)

• Power consumption: 15W（Max.）
• Volume: 277mmx150mm*90.2mm
• Operating temperature: -20°C to 55°C
• Storage temperature: -30°C to 85°C
• Humidity: 95% RH（Non-condensable water）

Temperature monitor 

 e.g.：W18-81-000 

          ——Model  W 

          e.g. 18

•  ——18：Digital tube type
•  ——19：Multi channel digital tube
•  ——28：LCD type
•  ——29：LCD Multi channel type 

          ——Channel count e.g. 8

•  ——2-9：2-9 channels
•  ——10 channels and above, and so one

           —— Temperature measuring range  e.g.1

•  ——1：-40-250℃

           ——Distinguishing code e.g.000

•  —000:Default type