31
Medium Flow Compressed Air Dryers - IOMI.
Using the 4-20mA Signal
The calculation used to interpret the 4-20mA signal differs between the Parker Dewpoint Sensor (PDS) and Hygrometer.
Parker Dewpoint Sensor 4-20 mA output Dewpoint Calculation
PARKER DEWPOINT SENSOR
Current
mA
4
5
6
7
8
9
10
10.66
11
12
13
14
15
16
17
17.4
18
19
20
PDP
o
C
Out of Sensor Accuracy Range
-50
-48
-40
-33
-25
-18
-10
-3
0
Out of Sensor
Accuracy Range
example:
measured value = 12mA
example:
measured value = 12mA
measure value = 14mA
measure value = 14mA
It should be noted that the accuracy of measured mA reflects the accuracy of the Parker Dew Point Sensor ±4°C.
Hygrometer 4-20 mA output Dewpoint Calculation
PARKER DEWPOINT SENSOR
Current
mA
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PDP
o
C
-100
-93
-85
-78
-70
-63
-55
-48
-40
-33
-25
-18
-10
-3
5
13
20
Dewpoint=((mA-4)×7.5)-100
((12-4)×7.5)-100=-40
((14-4)×7.5)-100=-25
Summary of Contents for CDAS HL 050 Series
Page 4: ...04 Medium Flow Compressed Air Dryers IOMI SAFETY...
Page 7: ...07 Medium Flow Compressed Air Dryers IOMI RECEIVING AND INSPECTING THE EQUIPMENT...
Page 9: ...09 Medium Flow Compressed Air Dryers IOMI MODEL OVERVIEW...
Page 13: ...13 Medium Flow Compressed Air Dryers IOMI OVERVIEW OF THE EQUIPMENT...
Page 17: ...17 Medium Flow Compressed Air Dryers IOMI INSTALLATION AND COMMISSIONING...
Page 37: ...36 Medium Flow Compressed Air Dryers IOMI CDAS HL OFAS HL FBP HL OPERATION...
Page 43: ...42 Medium Flow Compressed Air Dryers IOMI OPERATING THE EQUIPMENT...
Page 52: ...51 Medium Flow Compressed Air Dryers IOMI PREVENTATIVE MAINTENANCE...
Page 59: ...58 Medium Flow Compressed Air Dryers IOMI TECHNICAL SPECIFICATION...
