1. Brief Introduction
LU-904K is mainly suit for survey medium’s maximum temperature, such as molten steel. The controller judges the medium maximum temperature through survey medium elevation of temperature speed, also is when the elevation of temperature speed is lower than the set value, the controller will stop surveying and maintain highest observed value (may restore normal survey through pressed key), and at the same time output a alarm signal to indicate that might take out the temperature sensor to increase the sensor use times.

2. The main Technical Parameters
◆Input accuracy: ± (0.2%F.S+1) digit
◆Resolution: 1, 0.1
◆Display: Double Four LED Numerical Code Tube + light pillar
◆input type:  K、S、B、T、E、J、WRe325、N
Pt100、Cu50、Cu100
0-10 mA、 4-20mA
0-5V 、1-5V
specially input: R 、mV、other
◆output model types：
J1: relay output (resistance 250VAC/3A normally open and hold)
J2: relay output (resistance 250VAC/0.8A normally open)
J3: two relays outputs (resistance 250VAC/0.8A normally open×2)
T: SSR trigger output (12V/40mA)
I2: current transform output (0-10mA/4-20mA)
V5: voltage transform output (0-5V or 1-5V or 0-10V)
V1：DC12V/50 mA sensors power supply model
V2：DC24V/50 mA sensors power supply model
V3：DC5V/50 mA sensors power supply model
R：RS232 communication model
S：RS485 communication model
◆the T.C cold-junction compensation errors: ±1 ℃
◆the T.C breaks or measuring range ultra: Display Sb
◆sampling rate: 0.5 seconds
◆power voltage: 85-264VAC
◆ power consumption: 4W
 

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