SDV5000 c/w direct digital controls
SERVICE & INSTALLATION MANUAL
w w w .
p r i c e - h v a c
. c o m
3
SP300 Calibration Curves
( )
Calibration Equation
VP = Q
2
VP
- differential pressure at
sensor, inches w.g.
Q
- air flow rate, cfm at
standard density.
K
- calibration constant
K
Unit Size K
4
340
5
426
6
468
7
673
8
890
9
1155
10
1487
12
2141
14
3045
16
4074
24 x 16
7785
Notes
1. Gauge taps are normally supplied with the terminal unit to allow field measurement
of the differential pressure at the sensor with a manometer, magnahelic or other
measuring device.
If the terminal velocity controls utilize a flow-through transducer, a proper velocity
pressure reading will NOT be read at the gauge taps and the calibration curves
CANNOT be used for field measurement. The flow-through transducer operates
on the principle of mass flow rather than pressure differential.
Controls utilizing a dead-ended pressure transducer will allow field measurement
with the gauge taps and calibration curves provided.
2. Setting flow limits for a differential pressure of less than 0.02 inches in NOT
recommended. Stability and accuracy of flow limits may not be acceptable due
to low velocity pressure signal. Performance will vary depending on the terminal
unit controls provided.
3. For field calibration of air flow limits refer to the control contractor's documentation.
Содержание AM4A0A18S11SA Series
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