Mindray A7 - Pneumatic Controls

A7™ Operating Instructions 046-004667-00 9 - 21
Product Specifications Displays and Controls Specifications
9.13.2 Pneumatic Controls
Line Pressure Gauges: Gauges: N
2
O, Air, O
2
Range: 0 to 140 psi (0 to 1000 kPa)
Accuracy: ± (4 % of full scale reading + 8 % of actual reading)
Units of measure: kPa, psi
Cylinder Pressure Gauges: Gauges: N
2
O, Air, O
2
N
2
O: 0 to 1400 psi (0 to 10 MPa)
Air: 0 to 3500 psi (0 to 25 MPa
O
2
: 0 to 3500 psi (0 to 25 MPa))
Accuracy: ± (4 % of full scale reading + 8 % of actual reading)
Units of measure: kPa, psi
Electronic mixer: Direct Flow Control Mode:
O
2
flow range: 0 to 15 L/min
Air flow range: 0 to 15 L/min
N
2
O flow range: 0 to 12 L/min
Electronic Encoders Rotations:
< 4 (from minimum flow to maximum flow)
O
2
flow accuracy:
± 50 ml/min or ± 5 % of setting value, whichever is greater
Balance gas (Air/N
2
O) flow accuracy:
± 50 ml/min or ± 5 % of setting value, whichever is greater
Total Flow Control Mode:
Total flow range: 0.2 to 18 L/min
Total flow accuracy:
± 100 ml/min or ± 5 % of setting value, whichever is greater
Leakage from one gas inlet to another gas inlet is less than
10 ml per hour.
O
2
concentration range:
21 % to 100 % (The balance gas is Air)
26 % to 100 % (The balance gas is N
2
O)
O
2
concentration accuracy:
± 5 % V/V for flows < 1 L/min
± 5 % setting for flows ≥ 1 L/min
Compensation:
Temperature and atmospheric pressure compensated to
standard conditions of 20°C and 101.3 kPa (14.7 psi)
Backup flow meter, Control Needle
Valve and Knob:
Control Range (O
2
): 1+/-0.25 to 15 L/min
Control Range (Air): 0 to15 L/min
Rotations:
3.5 to 4.5 (O
2
from minimum flow to maximum flow)
4 to 5 (Air from minimum flow to maximum flow)
Flow meter order (left to right, viewing front of unit:
Air, O
2
.
Total flow meter range: 0 to10 L/min
Indicator: Flow tube
Indicator accuracy: ± 10 % of the indicated value for flows
(between 10 % and 100 % of full scale with oxygen)
Auxiliary O
2
and Air Flow Meter: Flow range for each meter: 0 to 15 L/min
Indicator accuracy of each meter: ± 10 % of the indicated
value for flows (between 10 % and 100 % of full scale)
TABLE 9-33
Pneumatic Controls