Measuring ranges
VA 521 English V1.20
Page 11 of 39
7
Flow measuring ranges
7.1 Flow for different gases
1/2"
3/4"
1"
1 ¼"
1 ½"
2"
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
Analog
output
20mA
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
[m³/h]
Reference DIN1945/ ISO 1217: 20°C, 1000 mbar
(Reference during calibration)
Air
Low Speed
20
45
75
140
195
320
Standard
45
85
145
265
365
600
Max
90
175
290
530
730
1195
High Speed
110
215
355
640
885
1450
Adjustment to DIN 1343: 0°C, 1013,25 mbar
Air
Low Speed
20
40
70
130
180
295
Standard
40
80
135
240
335
550
Max
80
160
270
485
670
1100
High Speed
100
195
325
590
815
1330
Argon
(Ar)
Low Speed
35
75
120
220
305
505
Standard
70
135
230
415
570
935
Max
140
275
460
830
1140
1870
High Speed
170
335
555
1005
1385
2265
Carbon dioxide
(
CO
2
)
Low Speed
20
45
75
140
195
320
Standard
45
85
145
260
360
590
Max
90
175
290
525
720
1185
High Speed
105
210
350
635
875
1430
Nitrogen
(N
2
)
Low Speed
20
40
70
130
180
295
Standard
40
80
135
240
335
550
Max
80
160
270
485
670
1100
High Speed
100
195
325
590
815
1330
Oxygen f
(O
2
)
Low Speed
20
45
75
135
185
305
Standard
40
80
140
250
345
570
Max
85
165
280
505
695
1140
High Speed
105
205
340
610
845
1380
Nitrous oxide
(N
2
O)
Low Speed
20
45
75
140
190
315
Standard
40
85
140
260
355
585
Max
85
170
285
520
715
1170
High Speed
105
210
345
630
865
1420
Other gases on request
Please note:
The area outside the pipeline (ambient area of the sensor) must not be an explosive area.