Digital Meter

Thermocpouple, Resistance Thermometer

MODEL 418M

■ Front panel IP 65 protection
■ DIN 72×36mm compact size
■ Applicable to various temperature sensors

Standard Specifications

Model Designation

418M	-	□	-	□	-	□
		①		②		③

①Input Specification

Thermocouple (T/C)

Code	Temperature sensor *1	Measuring range	Display range	Accuracy *2
TC	R	0 to 1600 °C	-50 to 1750 °C	±(0.3% of rdg. +1°C)
	K	-199 to 1200 °C	-199 to 1350 °C
	E	-199 to 800 °C	-199 to 1050 °C
	J	-40 to 750 °C	-199 to 1250 °C
	T	-199 to 350 °C	-199 to 420 °C
	B	600 to 1700 °C	-20 to 1810 °C
	N	-40 to 1200 °C	-199 to 1350 °C

*1:: K Thermocpouple is set as initial factory shipment
*2 Accuracy:: Specified at measuring range
Defined at 23°C ± 5°C, 45 to 75% RH,
Temperature coefficient:: ± 300 ppm/°C. Defined over an operating temperature range of 0 to 50°C
Reference junction compensation:: ± 1 °C for operating temperature range 0 to 50 °C

Calibrated according to JIS C-1602-2015 standard thermoelectric power mV input

Resistance Temperature Detector (RTD)

Code	Temperature sensor *3	Measuring range	Display range	Accuracy *4
PT	PT 100 Ω	-199.9 to 850.0 °C	-199.9 to 870.0 °C	±(0.2% of rdg. + 0.3°C)
PT	JPt 100 Ω	-199 to 600 °C	-199 to 650.0 °C	±(0.2% of rdg. + 0.3°C)

*3:: Pt 100Ω is set as initial factory shipment
*4 Accuracy:: Specified at measuring range
Defined at 23°C ± 5°C, 45 to 75% RH,
Temperature coefficient:: ± 200 ppm/°C for 0 to 50 °C

Calibrated according to JIS C-1604-2013 standard resistance element resistance values

②Power Supply

Code	Content
A	AC 100 to 240 V
B	DC 12 to 24 V

③Data output / Comaprison output

Code	Specifications	Output Impedance	Allowable Load Resistance
X	No output	―	―
03	Analog output DC 0 to 1V	Less than 0.1 Ω	More than 1 kΩ
04	Analog output DC 0 to 5 V	Less than 0.1 Ω	More than 5 kΩ
05	Analog output DC 0 to 10 V	Less than 0.1 Ω	More than 10 kΩ
09	Analog output DC 1 to 5 V	Less than 0.1 Ω	More than 5 kΩ
23	Analog output DC 0 to 1mA	More than 5M Ω	0 to 5 kΩ
29	Analog output DC 4 to 20 mA	More than 5 MΩ	0 to 600 Ω
BP	BCD output (TTL level, positive logic)
BN	BCD output (TTL level, negative logic)
DN	BCD output (transistor output, sink type)
RY	2-point comparison (relay contact output)
TN	2-point comparison (open collector output NPN)
TP	2-point comparison (open collector output PNP)

General Specifications

Display	Red LED (character height 15 mm) with zero suppression function
Mode display	1 digit, red LED (character height 8mm)
Over-range display	When exceeding display range, displays minimum or maximum value flashing.
Open circuit of input	Thermocouple input: Displays minimum value of display range flashing. RTD input: Displays maximum value of display range flashing
Resolution	Thermocouple input: 1 °C RTD input: 1 °C or 0.1 °C
External resistance	Thermocouple input: less than 500 Ω RTD input: Lead wire 1 line less than 5 Ω
Overload	DC ± 10 V
Sampling cycle	2.5 times/sec.
Input configuration	Single-ended, floating input
A/D conversion	Δ-Σ conversion system
Noise rejection	Normal mode (NMR): 50 dB or more Common mode (CMR): 110 dB or more Power line input noise: AC power 1000 V, DC power 500 V
Hold function	Measurement data, peak/bottom memory values and outpu data are kept.(Input is not isolated)
Peak memory/Bottom memory function	Display of maximum value or minimum value are possible.(Switchable from the front panel)
Withstand voltage	Between input terminal and output terminal: AC 500 V 1minute Between input and output terminal and power terminal: AC 1500 V 1 minute () Between power terminal and outer case: AC 1500 V 1minute ( DC power supply: AC 500 V 1 minute)
Insulation resistance	DC 500 V 100 MΩ or more
Power supply voltage tolerance	AC 90 to 250 V 50/60 Hz DC 10.8 to 32 V
Power Consumption	DC 12 V 32 mA DC 24 V 20 mA
Operating ambient temperature	0 to 50 °C
Protection grade	IP 65 equivalent
Weight	Approx. 200 g