- 19 -
5.2.
Linear Output 1.0
×
10
+2
Paf.s.
The output is 0 to 10 V and is delivered linearly to the pressure indication.
The relationship between the pressure indication and recorder output voltage is as shown below.
(with Pa display)
Table. 5-2
Pressure-Recorder Output Voltage: Linear 1.0
×
10
+2
Pa(1.0
×
10
+0
Torr) f.s.
with Pa display
with Torr display
Pressure
(Pa)
Voltage
(V)
Pressure
(Pa)
Voltage
(V)
Pressure
(Torr)
Voltage
(V)
Pressure
(Torr)
Voltage
(V)
4.0
×
10
-1
0.04
1.0
×
10
+1
1.0
3.0
×
10
-3
0.03
1.0
×
10
-1
1.0
5.0
×
10
-1
0.05
2.0
×
10
+1
2.0
4.0
×
10
-3
0.04
2.0
×
10
-1
2.0
8.0
×
10
-1
0.08
4.0
×
10
+1
4.0
8.0
×
10
-3
0.08
4.0
×
10
-1
4.0
1.0
×
10
-1
0.10
8.0
×
10
+1
8.0
1.0
×
10
-2
0.10
8.0
×
10
-1
8.0
2.0
×
10
+0
0.20
9.9
×
10
+1
9.9
2.0
×
10
-2
0.20
9.9
×
10
-1
9.9
4.0
×
10
+0
0.40
1.0
×
10
+2
10.0
4.0
×
10
-2
0.40
1.0
×
10
+0
10.0
8.0
×
10
+0
0.80
8.0
×
10
-2
0.80
9.9
×
10
+0
0.99
9.9
×
10
-2
0.99
Convert pressure using the following equation.
(Pa): P = (1×10
+2
) × V
／
10
⇔
V = 10 × P
／
(1×10
+2
)
P: Pressure (Pa)
V: Output voltage (V)
(Torr): P = (1×10
+0
) × V
／
10
⇔
V = 10 × P
／
(1×10
+0
)
P: Pressure (Torr)
V: Output voltage (V)
Voltage values on order of several mV are low in accuracy because the recorder output is 12-bit
DAC.
If a linear output in the 10
+2
Pa(10
+0
Torr) range is required, use the 1.0
×
10
+3
Pa(1.0
×
10
+1
Pa) full
scale.
The following voltages are outputted in other statuses.
When 0.0
×
10
-1
Pa(0.0×10
-3
Torr) is displayed
: 0.0 V
When 2.7
×
10
+3
Pa(2.0×10
+1
Torr) is displayed by blinking
: 10.0 V
When E.E
×
10
E
is displayed by blinking
: 10.0 V
