Kofloc 8500 Series Mass Flow Meter

This mass flow controller/meter driven by 24VDC power supply has been developed as a successor of the MODEL 8300. The viewpoint change function of the display unit and the pattern setting function are unique to this model, and noise resistance has been improved dramatically. A sister model with a detachable display and setting unit is also available.

• The high-lift actuator allows this compact model to control a large flow rate.
• Equipped with a display and setting unit, this model can be operated by the 24VDC power supply.
• The RS232C/RS485 communication function and integration function are provided as standard equipment.
• The 14-bit converter permits to display and operation in 4-1/2 digits.
• Control of the flow rate of inflammable gas is possible because the heat generating part of the sensor is not exposed to the gas.
• There are no limitations to the mounting position that may be employed.
• In addition to the SV setting, five other patterns can be set.
• Auto zero and auto close functions are also standard.

Specification

ITEM	8500MC/MM	8550MC/MM
Flow range	10SCCM〜20SLM	30SLM〜100SLM
（N2 equivalent　20℃/1ATM）	（freely selectable）	（freely selectable）
Sensor type	Thermal sensor
Valve type（*1）	Normally closed proportional solenoid valve
Control range（*1）	2〜100％（F.S.）	5〜100％（F.S.）
Response（*1）	≤2sec	≤3sec
	(within±2%F.S)	(within±2%F.S.)
Accuracy	±1.0%F.S.（25℃）	±1.5%F.S.（25℃）
Temperature coefficient	±0.1F.S./℃（15〜35℃）	±0.2F.S./℃（15〜35℃）
Repeatability	±0.5%F.S.
Operating differential pressure （*1）	F.S.≤5SLM　50〜300kPa（G）	F.S.≤50SLM　150〜300kPa（G）
	F.S.＞5SLM　100〜300kPa（G）	F.S.＞50SLM　200〜300kPa（G）
	Option：Medium differential pressure (MP), low differential pressure (LP) specifications are available
Allowable operating pressure（*1）	500kPa（G） or less
Proof pressure	980kPa（G）
Leak rate	≤1×10−8Pa・㎥/s（excluding permeation of He）
Allowable operating temperature	5〜45℃
Allowable operating humidity	10〜90％RH（No condensation allowed）
Materials of the gas contact part	Body: SUS316
	Valve seat :　FKM（option: CR or NBR）
	Sealing :　FKM（option: CR or NBR）
Electrical connection	Dsub half-pitch 20pin　DX10M−20S(HRS)
Flow rate setting signal	0〜5VDC（input impedance 100kΩ or more)
（*1）	or 4〜20mA　selectable
Flow rate output signal	0〜5VDC（external load resistance 250kΩ or more） or
	4〜20mA　（external load resistance 300Ω or less）selectable
Communication	RS232C（3 wire）or RS485（3 wire）　selectable
Other functions	Instantaneous flow rate・integrated flow rate display （ 7-segment 4-digit LED
	display accuracy ±1%　integrated display 0000〜9999MAX）,
	Alarm output（NPN open collector output 2 points
	Max DC35V　50mA）, pattern setting（5 pattern） function
Required power supply	24VDC±10%（ripple 5%） current consumption 300mA max
Joint	Standard　1/4F900（9/16-18UNF）	Standard　3/8F900（9/16−18UNF）
（Main unit bore）	Option 1/8F900, 1/4UJR,	Option 1/2F900, 3/8UJR,
	Rc1/4 etc.	Rc3/8 etc.
Weight	Approx. 1200g	Approx. 1500g

(*1)Only for the mass flow controller.