Introduction
Kofloc 8500 Series Mass Flow Meter/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.
Kofloc 8500 Series 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 100k? or more) | |
| ?*1? | or 4?20mA?selectable | |
| Flow rate output signal | 0?5VDC?external load resistance 250k? or more? or | |
| 4?20mA??external load resistance 300? 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.
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