41
Technical Data for 819-Series Mass Flow Meters
0 to 100 sccm Full Scale through 0 to 250 slpm Full Scale
Standard Operating Specifications (Contact
MATHESON
for available options)
Performance
819-Series Mass Flow Meter
Accuracy at calibration conditions
after tare
± (0.8% of R 0.2% of 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 Measurable Flow Rate
128% Full Scale
Typical Response Time
10 ms (Adjustable)
Warm-up Time
< 1 Second
Operating Conditions
819-Series Mass Flow Meter
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
150 psig
Mounting Attitude Sensitivity
None
Ingress Protection
IP40
Wetted Materials
303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass
Reinforced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, Silicon,
Glass.
If your application demands a different material, please contact
MATHESON
.
Communications / Power
819-Series Mass Flow Meter
Monochrome LCD Display with
integrated touchpad
Simultaneously displays Mass Flow, Volumetric Flow, Pressure and Temperature
Digital Output Signal
1
Options
RS-232 Serial
Analog Output Signal
2
Options
0-5 Vdc / 4-20 mA
Electrical Connection Options
RJ45
Supply Voltage
7 to 30 Vdc (15-30 Vdc for 4-20 mA outputs)
Supply Current
0.040 Amp (+ output current on 4-20 mA)
1. The
Digital Output Signal
communicates Mass Flow, Volumetric Flow, Pressure and Temperature
2. The
Analog Output Signal
communicate your choice of Mass Flow, Volumetric Flow, Pressure or Temperature
Range Specific Specifications
Full Scale Flow Mass
Meter
Pressure Drop at FS Flow
(psid) venting to atmosphere
1
Mechanical
Dimensions
Process Connections
2
100 sccm to 20 slpm
1.0
4.1”H x 2.4”W
x 1.1”D
1/8” NPT
Female
50 slpm
2.0
4.4”H x 4.0”W
x 1.6”D
1/4”
NPT Female
100 slpm
2.5
250 slpm
2.1
5.0”H x 4.0”W
x 1.6”D
1/2”
NPT Female
1. Compatible with Swagelok® tube, Parker®, face seal, push connect and compression adapter fittings. VCR and SAE
connections upon request.
Summary of Contents for 819 Series
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