Panel Meter
MODEL:451B

MODEL:451B

■ Thermocouple input/Platinum-resistance thermometer input
■ High-resolution of 0.1 or 0.01°C display
■ Water- and dust-proof IP65 front panel

Model Designation

451B
	1	2	3

1.Power supply voltage

Code	Power source voltage
A	AC100V~240V
B	DC12~24V
C	DC110V

2. Data output 1

Code	Data output	Output impedance	Tolerable Load resistive
Blank	-
09	Analog output DC0~10V (Available scaling,Default:1~5V )	0.1Ω or less	500Ω or more(DC1~5V) 1kΩ or more(DC0~10V)
29	Analog output DC0~20mA (Available scaling,Default:4~20mA)	5MΩ or more	0~600Ω(DC4~20mA)
BP	BCD output(TTL level positive logic)	-
BN	BCD output(TTL level negative logic)	-
DP	BCD output(transistor output,source type)	-
DN	BCD output(transistor output,sink type)	-
E0	RS-232C	-
E1	RS-485	-

3. Data output 2
(Available- 09 and -29 of ④Data output 1 only)

Code	Data output
Blank	No outout
E0	RS-232C
E1	RS-485

Measuring Input
Thermocouple

Sensor	Measuring range	Display range	Accuracy
R	100.0~1700.0℃	-50.0~1800℃	±(0.1% of rdg + 0.6digit) [100.0~500.0℃]
			±(0.1% of rdg + 0.5digit) [500.0~1700.0℃]
K	-100.0~1300.0℃	-200.0~1400.0℃	±(0.1% of rdg + 0.6digit) [-100.0~0.0℃]
			±(0.1% of rdg + 0.5digit) [0.0~1300.0℃]
E	-130.0~1000.0℃	-250.0~1050.0℃	±(0.1% of rdg + 0.5digit)
J	-140.0~1200.0℃	-210.0~1250.0℃
T	-200.0~400.0℃	-250.0~420.0℃
B	600.0~1800.0℃	-20.0~1820.0℃	±(0.1% of rdg + 0.6digit)
N	-100.0~1300.0℃	-230.0~1350.0℃	±(0.1% of rdg + 0.5digit)

Resistance thermobulb

Sensor	Measuring range	Display range	Accuracy
Pt100Ω range[1]	-200.0~850.0℃	-200.0~870.0℃	±(0.1% of rdg + 0.2digit) [0.0~100.0℃]
			±(0.2% of rdg + 0.3digit) [-200.0~0.0℃] [100.0~850.0℃]
Pt100Ω range[2]	-150.00~150.00℃	-180.00~180.00℃	±(0.1% of rdg + 0.2digit) [0.0~100.0℃]
			±(0.2% of rdg + 0.3digit) [-150.0~0.0℃] [100.0~150.0℃]
JPt100Ω	-200.0~645.0℃	-200.0~660.0℃	±(0.1% of rdg + 0.2digit) [0.0~100.0℃]
			±(0.2% of rdg + 0.3digit) [-200.0~0.0℃] [100.0~645.0℃]

Basic Specifications

Display	0~99999, red or green LED (character height 15.2mm), “-” polarity, with zero-suppress function. During the measuring mode, the display switches from current value to peak memory, bottom memory, display amplitude, and current value, by pushing PB key. Current value, PB 1 second, Memory, Peak memory, PM illuminates, Bottom memory, BM illuminates, Display amplitude
Unit ( ℃/ oF)	Selectable by the parameter setting ( oF = ℃ x 9/5+32)
Over-range indication	Blinking with minimum or maximum value of display range
Resolution	RTD input: 0.1 ℃ (0.01℃ when PT100Ω range 2)
Thermocouple input	0.1 ℃
External resistance	500Ω Max. for Thermocouple input
Wire resistance	5Ω Max. per wire for Thermocouple input
Overload	DC +/- 10V
Sampling rate	Approx. 5 times / sec.
Display cycle	selectable from 200ms, 400ms, 1s, 2s, 4s, 5s
Response	within 2 samplings or within display cycle, whichever longer
Input method	Single ended, floating input
A/D conversion	⊿-∑ conversion method
Noise Rejection	Normalmode (NMR) - 50dB or more. Common mode (CMR) - 110dB or more. Noise through power supply line - 1000V (at AC voltage power supply)
Insulation Resistance	-DC500V 100MΩor more.
Withstanding Voltage	Input terminals - Case : AC1500V each for 1 min. Power supply terminals - Case : AC1500V each for 1 min. Power supply terminals - Input and output terminals : AC500V each for 1min. Input terminals - Output terminals : AC500V each for 1 min.
Power Supply	AC 100 to 240V (90-250V) 50/60HZ, DC12 to 24V (9-32V)
Power Consumption	451B itself: Approx. 7VA at100V AC, 9VA at 200VAC, 300mA at 12V. 150mA at 24VDC.
Operating Temperature	0 to 50℃
Storage Temperatur e	-20 to 70℃
Weight	Approx. 300g
Housing protection	IP65 for the front panel, IP20 for the rear case, IP00 for terminals
Mounting Method	Panel mount with the bracket

Operation Manual