Azbil Micro Flow MQV0005, User Manual

Page: 82 / 90

7-12
Chapter 7. SPECIFICATIONS
Handling Precautions
•
If the outlet pressure is different from the values graphed on the
previous page, calculate the flow rate using the appropriate equa-
tion below.
(1) When P2 / P1 > 0.53,
Q=C1 (P1-P2) P2
(2) When P2 / P1 0.53,
Q=C2 • P1
P1: Inlet absolute pressure [kPa (abs)]
P2: Outlet absolute pressure [kPa (abs)]
(Absolute pressure = gauge pr 101.3 kPa)
Q: Flow rate [L/min (standard)], ( [mL/min] (standard) for MQV9020/9050)
C1 and C2: Constant values by model
(Hydrogen)
MQV9020: C1=2.684, C2=1.340
MQV9050: C1=2.684, C2=1.340
MQV9500: C1= 0.01181, C2=0.00590
MQV0005: C1= 0.1181, C2=0.0590
MQV0010: C1= 0.1181, C2=0.0590
MQV0050: C1= 1.181, C2=0.590
MQV0200: C1= 2.091, C2=1.044
(Helium)
MQV9020: C1=1.904, C2=0.950
MQV9050: C1=1.904, C2=0.950
MQV9500: C1= 0.00838, C2=0.00418
MQV0005: C1= 0.0838, C2=0.0418
MQV0010: C1= 0.0838, C2=0.0418
MQV0050: C1= 0.838, C2=0.418
MQV0200: C1= 1.483, C2=0.740
Ex.: For the MQV0200, gas type is hydrogen, inlet pressure
is 100kPa (gauge), and outlet pressure is 80 kPa (gauge).
P1=201.3 kPa(abs), P2=181.3 kPa(abs) → P2/P1=0.901
Q= 2.091 X (201.3-181.3) X 181.3
=126 [L/min(standard)]
„
Optional parts (sold separately)
Item Model No. Remarks
Cable with dedicated connector 81446681-001 20-wire flat cable 2 m (AWG#24)
81446951-001 20-wire shielded cable 5 m (7/0.2 mm
2
)
AC adapter 81446957-001 Input rating: 100 to 240 V AC 50/60 Hz 0.4 A
Output rating: 24 V DC/750 mA
Operating temperature range: 0 to 40 °C
Potentiometer for flow rate setting 81446683-002 5 kΩ with digital dial, 10 turns
Front cover for separate displayunit 81446858-001 Mask: 1 piece
Plate: 1 piece
Mounting screws: 2 pieces
Loader Package MLP100A100 MQV can be configured on a PC.
In addition, operating status such as flow rate
trends can be monitored on the PC screen.
Rc 1/4" joint 81446834-001 Set of 2 pieces, O-ring attached, oil-inhibited product
1/4" Swagelok 81446833-001 Set of 2 pieces, O-ring attached, oil-inhibited product
1/4" VCR 81446895-001 Set of 2 pieces, O-ring attached, oil-inhibited product
Handling Precautions
•
The old type AC adapter, 81446682-001, (15 V DC, 350 mA) cannot
be used for this device.