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Technical Data for Alicat MCD and MCRD Dual Valve Mass Flow
Controllers
0 to 0.5 sccm Full Scale through 0 to 3000 slpm Full Scale
Standard Operating Specifications (Contact Alicat for available options)
Performance
MCD Mass Flow Controller
MCRD Mass Flow Controller
Accuracy for Bidirectional Controllers
at calibration conditions after tare
± (0.8% of r 0.2% of total span from positive full scale to negative full scale)
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
Communications / Power
MCD Mass Flow Controller
MCRD 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 / Modbus / 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
12 to 30 Vdc (15-30 Vdc for 4-20 mA outputs)
24 to 30 Vdc
Supply Current
0.250 Amp
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. See PROFIBUS specifications for supply voltages and
currents
(
www.alicat.com/profibus
). PROFIBUS units do not have the display.
Operating Conditions
MCD Mass Flow Controller
MCRD 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%
Max. Internal Pressure (Static)
145 psig
Proof Pressure
175 psig
Mounting Attitude Sensitivity
None
Mount with valve cylinder vertical & upright
Valve Type
Normally Closed
Ingress Protection
IP40
Wetted Materials
MCD:
303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Rein-
forced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, Brass, 430FR
Stainless Steel, Silicon, Glass..
MCRD:
303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Rein-
forced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, 416 Stainless Steel,
Silicon, Glass. If your application demands a different material, please contact Alicat.
Range Specific Specifications
Full Scale Flow Mass
Controller
Pressure Drop
1
at FS Flow
(psid) venting to atmosphere
Mechanical
Dimensions
Process Connections
2
MCD
0.5 sccm to 50 sccm
1.0
Dimensions will vary
with valve choice.
M-5 (10-32) Female Thread
3
MCD
100 sccm to 500 sccm
1.0
1/8” NPT Female
MCD
1 slpm
1.5
MCD
2 slpm
3.0
MCD
5 slpm
2.0
MCD
10 slpm
5.5
MCD
20 slpm
20.0
MCRD
50 slpm
2.0
1/4” NPT Female
MCRD
100 slpm
3.2
MCRD
250 slpm
2.4
1/2” NPT Female
MCRD
500 slpm
6.5
3/4” NPT Female
(A 1-1/4” NPT Female process
connection is available for
2000 slpm controllers.)
MCRD
1000 slpm
14.0
MCRD
1500 slpm
17.0
MCRD
2000 slpm
28.6
MCRD
3000 slpm
16.8
1-1/4” NPT Female
1. Lower Pressure Drops Available, please see our
WHISPER-Series
mass flow controllers at
www.alicat.com/whisper
.
2. Compatible with Swagelok® tube, Parker®, face seal, push connect and compression adapter fittings. VCR and SAE
connections upon request.
3. Shipped with M-5 (10-32) Male Buna-N O-ring face seal to 1/8” Female NPT fittings.