TSURUGA MODEL 481B

Thermocouple-Resistance Thermometer

• ■ Clear large LED display with high brightness.
• ■ 83 mm short case with terminal system
• ■ Power supply: AC or DC
•  
• Model Designation

• 481B	-	□	-	□	-	□
  		①		②		③

  ①Measuring Input

  Thermocouple

  Code	Type	Measuring Range	Accuracy　*
  01	R	400 to 1600°C	±(0.3% of rdg + 3°C)
  02	K	0 to 1200°C	±(0.3% of rdg + 2°C) [0 to 400°C] ±(0.3% of rdg + 3°C) [400 to 1200°C]
  04	J	0 to 300°C	±(0.3% of rdg + 2°C)
  05	T	0 ot 400°C	±(0.3% of rdg + 2°C)

       *Accuracy:

  Defined at 23 ± 5°C, 45 to 75% RH.

        Temperature coefficient:

  Defined at ±300 ppm/°C (Temp. range: 0 to 50°C)

  Display	Red or Green LED (character height 14.2 mm)
  Linearizer	Analog tangential approximation
  Resolution	1°C
  Response time	Approx. 1.5s
  External resistance	Less than 200 Ω
  Overload	DC ±100 V

  Resistance Thermometer

  Code	Type	Measuring Range	Accuracy *
  11	Pt100Ω	-100.0 to 199.9°C	±(0.2% of rdg + 0.3°C) [-100.0 to 0°C] ±(0.2% of rdg + 0.2°C) [0 to 199.9°C]

       *Accuracy:

  Defined at 23 ± 5°C, 45 to 75% RH.

        Temperature coefficient:

  Defined at ±200 ppm/°C (Temp. range: 0 to 50°C)

  Display	Red or Green LED (character height 14.2 mm)
  Resolution	0.1°C
  Response time	Approx. 1.5s
  External resistance	Less than 5 Ω/lead wire.
  Overload	DC ±10 V

  ②Power Supply

  Code	Power Source Voltage
  3	AC 100 V
  5	AC 200 V
  9	DC  24 V

  ③Display Color

  Code	Description
  Blank	Red LED
  G	Green LED

  General Specifications

  Sampling rate	Approx. 2.5 times/s
  Input configuration	Single ended, floating input
  A/D conversion	Dual Slope Integration System
  Noise rejection	Normal mode （NMR） More than 40 dB Common mode（CMR） 　More than 110 dB AC Power source line mixing noise　1000 V
  Withstand voltage	Between input terminal and external case: AC 1500 V for 1min. Between power source terminals and external case: AC 1500 V for 1min. Between power source terminals and input terminals: AC 1500 V for 1min.
  Insulation resistance	DC 500 V More than 100 MΩ
  Power supply	AC 100 V AC 200 V DC 24 V
  Tolerance of source voltage	AC 90 to 132 V AC 180 to 250 V DC 24 V ± 10%
  Power consumption	AC power source ... approx. 2 VA DC 24 V power source ... approx. 70 mA
  Operating temperature	0 to 50°C
  Storage temperature	-20 to 70°C
  Weight	AC power source models ... approx. 290 g DC power source models ... approx. 190 g