Digital Meter / Printer

Temperature Measuring Digital Meter Relay

MODEL 4258

■ Easy calibration for scaling
■ Available analog or BCD output
■ Relay or open collector for comparison output

Model Designation

4258	-	□	-	□	-	□	-	□	-	□
		①		②		③		④		⑤

① Power supply voltage

Code	Power source voltage
A	AC 100 to 240 V
B	DC 12 to 24 V

②Data output

Code	Data output	Tolerable Load resistive
Blank	-
03	Analog output DC ±1 V	More than 200 Ω
04	Analog output DC ±5 V	More than 1 kΩ
05	Analog output DC ±10 V	More than 2 kΩ
09	Analog output DC 1 to 5 V	More than 1 kΩ
23	Analog output DC ±1 mA	0 to 10 kΩ
24	Analog output DC ±5 mA	0 to 2 kΩ
29	Analog output DC 4 to 20 mA	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)	-
E1	RS-485	-

③Comparison output

Code	Specification
Blank	Relay output
TN	Open collector output (NPN)

④Comparison system

Code	Description
Blank	HI,GO,LO *
H	HI,GO,
L	GO,LO *

*Can be changed to HH,H,GO and GO,L,LL

⑤Display color

Code	Color
Blank	Red LED
G	Green LED

Measuring Input

Thermocouple

Sensor	Measuring range	Display range	Accuracy	Over load
R	100.0 to 1768.0°C	-50.0 to 1800°C	±(0.3% of rdg + 1°C)	DC ±10 V
K	-200.0 to 1372.0°C	-270.0 to 1400.0°C
E	-200.0 to 1000.0°C	-270.0 to 1050.0°C
J	-200.0 to 1200.0°C	-210.0 to 1250.0°C
T	-200.0 to 400.0°C	-270.0 to 420.0°C
B	600.0 to 1800.0°C	-20.0 to 1820.0°C
N	-200.0 to 1300.0°C	-230.0 to 1350.0°C

Resistance thermobulb

Sensor	Measuring range	Display range	Accuracy	Over load
Pt100Ω	-200.0 to 850.0°C	-200.0 to 870.0°C	±(0.2% of rdg + 0.3digit)	DC ±10 V
JPt100Ω	-200.0 to 645.0°C	-200.0 to 660.0°C	±(0.2% of rdg + 0.3digit)	DC ±10 V

Basic Specifications

Display	Red or Green LED (character height 14.2mm), “-” 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.
Sensor selection	Selectable from 9 types of temperature sensor
Over-range display	Flashing with minimum or maximum value of display range
Direction of burnout	Flashes at Max. display value. In case of RTD, it is selectable at Max. or Min. display value
Response	within 1 second or within display cycle, whichever longer
Resolution	RTD input: 0.1 °C (0.01°C when PT100Ω range 2)
External resistance	500Ω Max. for Thermocouple input 5Ω Max. per wire for RTD input
Sampling rate	Approx. 5 times/s.
Display cycle	Selectable from 200ms, 400ms, 1s, 2s, 4s, 5s
Input method	Single ended, floating input
A/D conversion	⊿-∑conversion method
Noise Rejection	Normal mode (NMR) - More than 50 dB. Common mode (CMR) - More than 110 dB. Noise through power supply line – 1000 V (at AC voltage power supply)
Comparative digit	Figure: 4-digit, Pole: 1-digit
Comparative method	2-isolated contact, programmable of high/low point (for model HI, GO, and LO) CPU comparative judgement method (against display value)
Judgement	Digital switch setting
Width of hysteresis	1 - 999, set the same value for 2-comparative output
Comparative display	LED display, HI(red), GO(green), and LO(yellow)
Comparative output	Relay contact, 1-SPST Normally Open, 125 V 0.5 A AC, 250 V 0.1 A AC (resistive) NPN Open collector, Max. DC 30 V 30 mA, Max. 1.6 V saturation voltage
Hold	Hold for the measuring data, comparative output, and data output
Reset	Default the comparative output
Insulation Resistance	DC 500 V, More than 100 MΩ
Withstand Voltage	Input terminals – External case: AC 1500 V each for 1min. Power supply terminals – External case: AC 1500 V each for 1min. Power supply terminals - Input and output terminals: AC 500 V each for 1min.
Power Supply	AC 100 to 200 V (50/60Hz), DC 12 to 24 V
Power Consumption	Approx. 5 VA at 100 V AC, 7 VA at 200 V AC, 180 mA at 12 V. 90 mA at 24 V DC.
Operating Temperature	0 to 50°C
Storage Temperature	-20 to 70°C
Weight	Approx. 450 g