Furnace Atmosphere Analyzers for Reductive Atmosphere Furnaces (CP Meters) : Measuring Instrument Products

CP Meters

Transmitter for CP Meters

Arithmetic Unit Model CPM / Indicating Regulator Model CPC-D

Optimal for atmospheric control based on carbon potential value
A control sensor featured by long operating life, high quality, high-speed response and stable indication

Use

Metamorphic furnaces, continuous furnaces, batch furnaces related to carburizing furnaces
Hardening furnaces
Annealing furnaces

Specifications

Model	Transmitter for CP Meters
Reference air flow rate	30 – 50cc/min
Burnout air flow rate	2 – 5L/m
Operating temperature (furnace temperature)	800 – 960°C
Ambient terminal temperature	-10 to +120°C
Measurement coverage	1 – 10^-25O₂atm (up to austenitic region)

Model		Arithmetic Unit Model CPM
Input signal	O₂ sensor input	1 point, -100 to 1,500mVDC
	TC input	1 point, R/K (changeover based on system data)
	CO meter input	1 point, 4 – 20mADC or 0 – 1VDC (Isolate signal, changeover based on system data)
	Sensor check	1 point each, no-voltage contact signal, contact specifications (12VDC, 2mADC)
	CO meter input enable
	Output display hold
Output signal	Analog output	2 points, 4 – 20mADC (Load resistance: Within 400Ω) No. 1: CP arithmetic output, No. 2: Temperature, CO/O₂ sensor input (changeover based on system data)
Output signal	Alarm output	2 points Contact capacity – Load resistance: 110VAC 0.5A, 24VDC 1A Induced load: 110VAC 0.2A, 24VDC 0.3A
Power source		85 – 264VAC free power source common to 50/60Hz, Approx. 15VA
Weight		Approx. 870g
Ambient temperature		- 10 to 50°C

Model

Indicating Regulator Model CPC-D

Measurement range

Thermocouple 28 types, DC voltage 6 type, DC current 1 type, temperature measuring resistor 14 types

Temperature unit

°C, K

Rated precision

±0.1%±1 digit of measurement range

Reference point compensation system

±0.5°C

Input import cycle

Approx. 0.1 sec

Input impedance

Thermocouple: ≧1MΩ

Calibration

DV voltage: ≧1MΩ
DC current: Approx. 250Ω

Allowable signal source resistance

Thermocouple: ≦100Ω
DC voltage (mV): ≦100Ω
DC voltage (V): ≦300Ω

Max. allowable input

Thermocouple: ≦±20V
DV voltage (mV): ≦±20V
DV current: ≦±30mA, ≦±7.5V
Temperature measuring resistor: ≦500Ω, ≦±5V

Current output form

Output signal: 4 – 20mA
Load resistance: ≦750Ω

SSR drive pulse form

Output signal: ON-OFF pulse voltage signal
Output voltage:
ON voltage: 12VDC±20%
OFF voltage: ≦0.8VDC
Load current: ≦20mA

Voltage output form

Output signal: 0 – 10V
Output impedance: Approx. 10Ω
Load resistance: ≧50kΩ

Number of alarm points

Output signal

Relay output signal (“a” contact)

Rated power voltage

General power specifications	: 10 – 240VAC
24V power specifications	: 24VAC/24VDC

Rated power frequency

General power specifications	: 50/60Hz
24V power specification	: DC, 50/60Hz

Max. power consumption

General power specifications	:	100VAC 10VA
		240VAC 15VA
24V power specifications	:	24VAC 10VA
		24VDC 5W

Mounting method

Panel embedding

External dimensions

96(H)×96(W)×127(D)
(Depth dimensions from panel surface: 120)

CP-X

Maintenance-free
Optimal for control due to quick response
Easy sensor replacement
Directly connectable with no need of piping for sampling

Use

Metamorphic furnaces related to carburizing furnaces
Continuous furnaces
Batch furnaces
Hardening furnaces
Annealing furnaces
Ferrite baking furnaces

Specifications

Model	CP-X
Measurement coverage	1 – 10^-25O₂atm
Response time	10 sec (90% response)
Heater capacity	260VA
Ambient temperature	-10 to 150°C
Setting temperature	850°C