Alicat MC Series Mass Flow Controller - Manual (Page 55)

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Technical Data for Whisper Low Pressure Drop Mass Flow Controllers
0 to 0.5 sccm Full Scale through 0 to 500 slpm Full Scale
Performance Whisper MCW & MCRW Mass Flow Controller
Accuracy at calibration
conditions after tare
± (0.8% of Reading + 0.2% of Full Scale)
High Accuracy at calibration
conditions after tare
± (0.4% of Reading + 0.2% of Full Scale)
High Accuracy option not available for units ranged under 5 sccm or over 500 slpm.
Repeatability ± 0.2% Full Scale
Zero Shift and Span Shift 0.02% Full Scale / ºCelsius / Atm
Operating Range / Turndown Ratio 0.5% to 100% Full Scale / 200:1 Turndown
Maximum Controllable Flow Rate 102.4% Full Scale
Typical Response Time 100 ms (Adjustable)
Warm-up Time < 1 Second
Standard Specifications (Contact Alicat for available options.)
Communications / Power Whisper MCW & MCRW Mass Flow Controller
Monochrome LCD or Color TFT
Display with integrated touchpad
Simultaneously displays Mass Flow, Volumetric Flow, Pressure and Temperature
Digital Input/Output Signal 1 Options RS-232 Serial / RS-485 Serial / PROFIBUS 3
Analog Input/Output Signal 2 Options 0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
Optional Secondary Analog
Input/Output Signal 2
0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
Electrical Connection Options 8 Pin Mini-DIN / 9-pin D-sub (DB9) / 15-pin D-sub (DB15) / 6 pin locking
Supply Voltage MCW: 12 to 30 Vdc (15-30 Vdc for 4-20 mA outputs) MCRW: 24 to 30 Vdc
Supply Current MCW: 0.250 Amp MCRW: 0.750 Amp
1. The Digital Output Signal communicates Mass Flow, Volumetric Flow, Pressure and Temperature
2. The Analog Output Signal and Optional Secondary Analog Output Signal communicate your choice of Mass
Flow, Volumetric Flow, Pressure or Temperature
3. If selecting PROFIBUS, no analog signal is available. PROFIBUS units do not have the display. See PROFIBUS
specifications for PROFIBUS supply voltages and currents. ( www.alicat.com/profibus)
Operating Conditions Whisper MCW & MCRW Mass Flow Controller
Mass Reference Conditions (STP) 25ºC & 14.696 psia (standard — others available on request)
Operating Temperature −10 to +50 ºCelsius
Humidity Range
(Non–Condensing)
0 to 100%
Maximum Pressure 50 psig Higher line pressures available, please contact Alicat.
Mounting Attitude Sensitivity MCW: None MCRW: Mount with valve cylinder vertical & upright
Valve Type Normally Closed
Ingress Protection IP40
Wetted Materials
MCW: 303 & 302 Stainless Steel, Viton®, Silicone RTV (Rubber), Glass Reinforced
Nylon, Aluminum, Brass, 430FR Stainless Steel, Silicon, Glass.
MCRW: 303 & 302 Stainless Steel, Viton®, Silicone RTV (Rubber), Glass Reinforced
Nylon, Aluminum, 416 Stainless Steel, Nickel, Silicon, Glass.
If your application demands a different material, please contact Alicat.
Range Specific Specifications
Full Scale Flow Mass
Controller
Pressure Drop at FS Flow
(psid) venting to atmosphere
Mechanical
Dimensions
Process Connections 1
MCW 0.5 sccm to 2 sccm 0.06
3.9”H x 3.4”W x 1.1”D
M-5 (10-32) Female
Thread 2
MCW 5 sccm to 10 sccm 0.08
MCW 20 sccm 0.07
MCW 50 sccm to 200 sccm 0.07
4.1”H x 3.6”W x 1.1”D 1/8” NPT Female
MCW 500 sccm 0.08
MCW 1 slpm 0.10
MCW 2 slpm 0.18
MCRW 5 slpm 0.10
5.5”H x 7.7”W x 2.3”D 1/4” NPT Female MCRW 10 slpm 0.12
MCRW 20 slpm 0.26
MCRW 40 slpm 0.14 5.5”H x 7.7”W x 2.3”D 1/2” NPT Female
MCRW 50 slpm 0.17
5.5”H x 7.3”W x 2.3”D 3/4” NPT Female MCRW 100 slpm 0.30
MCRW 250 slpm 0.69
MCRW 500 slpm 0.69 5.5”H x 8.1”W x 2.7”D 3/4” NPT Female
1. Compatible with Beswick®, Swagelok® tube, Parker®, face seal, push connect and compression adapter fittings. VCR and
SAE connections upon request.
2. Shipped with M-5 (10-32) Male Buna-N O-ring face seal to 1/8” Female NPT fittings.