Sierra Instruments Instruction Manual
Smart-Trak
®
2 Series 100
79
Differential Pressure Requirement for Controllers
(lower or higher available upon request)
Optimum: 30-60 psi (2-4 bar)
Minimum: See chart below. Note that required pressure increases with flow rate.
Minimum Differential Pressure Requirement for Air, Mass Flow Controllers
Flow Rate
(slpm)
Pressure Drop in PSI (mbar)
Low Flow
¼ inch
fittings (std)
Low Flow
3/8 inch
fittings (opt.)
Medium
Flow
3/8 or ½ inch
fittings
High Flow
Small Bore (100H)
(std up to 500 slpm)
½ comp fittings
High Flow
Large Bore (H1, H2)
(std 501-1000 slpm)
3/4 comp fittings
0.1
1 (68)
1 (68)
N/A
N/A
N/A
1
1.5 (102)
1.28 (87)
N/A
N/A
N/A
10
6 (408)
3.8 (258)
N/A
N/A
N/A
20
12 (816)
6.6 (449)
1 (68)
N/A
N/A
30
15 (1020) *
9.4 (639)
1.2 (82)
N/A
N/A
40
30 (2040) *
12.2 (830)
1.6 (110)
N/A
N/A
50
40 (2720) *
15 (1020)
2 (136)
N/A
N/A
100
N/A
N/A
5 (340)
1.5 (102)
1.0 (68)
150
N/A
N/A
10 (680)
2 (136)
1.0 (68)
200
N/A
N/A
15 (1020)
4.5 (306)
1.0 (68)
250
N/A
N/A
20 (1360)
5.5 (374)
1.5 (102)
300
N/A
N/A
25 (1700)
6.5 (442)
2.0 (136)
350
N/A
N/A
30 (2040)
8.5 (578)
3.0 (204)
400
N/A
N/A
35 (2380)
10.5 (714)
4.0 (272)
450
N/A
N/A
N/A
13 (884)
5.0 (340)
500
N/A
N/A
N/A
15 (1020)
6.0 (408)
750 N/A N/A
N/A
N/A*
15
(1020)
1000 N/A
N/A
N/A
N/A*
20
(1360)
Note: tests performed at 21 degrees C, outlet at ambient pressure
*Larger fittings recommended for these flow rates because these fittings reduce overall
performance
Gas & Ambient Temperature
32 to 122°F (0 to 50°C)
Leak Integrity
5 X 10
-9
standard cc/sec of helium maximum
Power Requirements
Ripple should not exceed 100 mV peak-to-peak
For Mass Flow Meters:
15-24 ±10%, VDC, (230mA, regulated)
For Mass Flow Controllers: C100L: 24 VDC ±10%, (500mA, regulated)
C100M: 24 VDC ±10%, (800mA, regulated)
C100H: 24 VDC ±10%, (1260mA, regulated)