The FMA-LP2600A Series mass flow controllers use
the principle of differential pressure within a laminar
flow field to determine and control mass flow rate.
A laminar flow element (LFE) inside the meter forces
the gas into laminar (streamlined) flow. Inside this
region, the Poiseuille equation dictates that the
volumetric flow rate be linearly related to the pressure
drop. A differential pressure sensor is used to
measure the pressure drop along a fixed distance of
the LFE. This, along with the viscosity of the gas, is
used to accurately determine the volumetric flow rate.
Separate absolute temperature and pressure sensors
are incorporated and correct the volumetric flow rate
to a set of standard conditions. This standardized
flow rate is commonly called the mass flow rate
and is reported in units such as standard cubic
centimeters per minute (SCCM) or standard liters
per minute (SLM).
The controller uses a true proportional valve coupled
to the flow body to control flow using the integral
PID loop controller. Standard units include a
0 to 5V output (4 to 20 mA optional) and RS232
communications. The gas-select feature and the
setpoints can be adjusted from the front keypad or
via RS232 communications. Volumetric flow, mass
flow, absolute pressure, and temperature can all be
viewed or recorded through the RS232 connection.
It is also possible to multi-drop up to 26 units on the
same serial connection to a distance of 46 m (150').
Specifications Accuracy: ±(0.8% of reading + 0.2% FS) Repeatability: ±0.2% FS Turndown Ratio: 200:1 Control Response Time: 100 ms Input Control Signal: 0 to 5 Vdc, RS232 Output Signal: 0 to 5 Vdc, RS232 Optional Input/Outputs: 4 to 20 mA, 0 to 10 Vdc Operating Temperature: -10 to 50°C (14 to 122°F) Zero Shift: 0.02%/ATM FS/°C Span Shift: 0.02%/ATM FS/°C Humidity Range: 0 to 100% RH, non-condensing Excess Flow Rate: 2.4% FS Wetted Materials: Standard: 303 and 302 SS, FKM, silicone RTV (rubber), glass-reinforced nylon, aluminum, brass, 410 SS, silicone, glass; >250 SLM: 416 SS and nickel replace brass -LSS (Option):316LSS, 303SS, 430FRSS, Perfluoroelastomer standard, FKM, EPDM, Buna, Neoprene
Maximum Pressure: 50 psig To Use in Volumetric Mode: Near atmosphere, 15 psig recommended maximum. Volumetric flow meters and controllers not certified for accuracy at mass flow rates above the rated flow range of the meter. They are designed for near atmospheric pressure conditions only. The recommended maximum operating pressure is 15 psig Supply Current: 0.250 A for 20 SLM and under; 0.75 A for 50 SLM and above (typical) Supply Voltage: 15 to 30 Vdc for units 2 SLM and smaller; 24 to 30 Vdc for units 5 SLM and larger Electrical Connections: 8-pin circular mini DIN
† All dollar amounts on this site are shown in Singapore currency.
Note: Comes complete with 24 Vdc universal power supply, 1.8 m (6') cable, 8-pin male Mini- DIN connector, operator's manual, and NIST certificate.
Standard units are calibrated to air @ 5 psig for 0 to 1 LPM, 15 psig for 2 to 10 LPM, 30 psig for 20 to 100 LPM, and 50 psig for 200 LPM and greater.
For custom calibrations, add "-(*)" to the model number, no additional cost. *Specify gas, and inlet/outlet or backpressure for custom calibrations.
Calibrations done at ambient (25°C/77°F) temperature only.
To replace the standard RS232 communications with RS485, add suffix "-RS485" to the model number, add $120 to the price.
Standard input is 0-5V, for optional 4-20 mA input add suffix "-IN" to the model number, no additional cost.
Optional secondary output are scaled the same as the primary output scale. For an alternate output scale add suffix "-T" to the model number for temperature or "-P" for pressure, no additional cost.
For units scaled in SCFH, add suffix "-SCFH" to model number, no additional cost. Please specify the desired range in SCFH.
For totalizer option, add suffix "-TOT" to the model number, add $120 to the price. Please specify resolution.
This is a 6-digit counter. Examples: For totalizing in liters with 1/100 liter resolution, the max count would be 9999.99. For totalizing in liters with 1 liter resolution, the max count would be 999999.
For a Remote Display, add suffix "-RD-*FT" to the model number, add $210 to the price. Replace the * in the suffix with the required length in whole feet, the maximum length is 3.6576 m (12'). Please note the optimum distance in feet is between 2.7 to 3 m (9 to 10').
Ethernet/IP, DeviceNet, Modbus and Profibus communications are also available for an additional charge.
Part Number Builder
Option Descriptions
(1)
Max Flow
Select 01 for 0.5 SCCM 02 for 1 SCCM 14 for 2 SCCM 15 for 5 SCCM 03 for 10 SCCM 16 for 20 SCCM 04 for 50 SCCM 17 for 100 SCCM 18 for 200 SCCM 19 for 500 SCCM 20 for 1 SLM 05 for 2 SLM 06 for 5 SLM 07 for 10 SLM 08 for 20 SLM 09 for 50 SLM 10 for 100 SLM 11 for 250 SLM 12 for 500 SLM
(2)
Output
Select Nothing(leave field blank) for None -I for 4 to 20 mA output -I2 for Two 4 to 20 mA outputs -V2 for Two 0 to 5V Outputs -I2-T for Two 4 to 20 mA outputs second output for temperature -V2-T for Two 0 to 5V outputs second output for temperature -I2-P for Two 4 to 20 mA outputs second output for pressure -V2-P for Two 0 to 5V outputs second output for pressure -VOL for Volumetric flow rate as standard output
(3)
Portable Version
Select Nothing(leave field blank) for Standard -B for Portable version of the meter (not available on models with 4 to 20 mA output)
(4)
Input
Select Nothing(leave field blank) for 0 to 5V -IN for 4 to 20 mA input
(5)
RS485
Select Nothing(leave field blank) for RS232 -RS485 for RS485
(6)
SCFH
Select Nothing(leave field blank) for Standard -SCFH for Units scaled in SCFH
(7)
Totalizer
Select Nothing(leave field blank) for Standard -TOT for Totalizer
NOTE: All combinations may not be valid, check spec sheet for valid part numbers.
Keywords:mass volumetric gas flow controllers, flow meter, flowmeter, flow, alicat measurement, gas flow, air flow, mass flow controller, mass flow controller
