ABUS Technologies DFT Series Differential Pressure Transmitter User Manual
Page 7
ABUS TECHNOLOGIES INC.
7
DFT
6. INSTALLATION
6.1 Mounting
The DFT Series should be mounted in a clean, dry location free from excess
vibration. The transmitter can be mounted in any orientation and should be attached by
using the 4 holes provided on the housing.
6.2 Pressure Connections
Two push on pressure connections are located on the front of the unit, labeled
“High” and “Low”. For best results, connect 1/8” I.D. push on tubing to the pressure
connections. For differential pressure measurement, the higher pressure should be
connected to the “High” pressure port. For positive pressure, the “Low” pressure port
should be left vented to atmospheric pressure. For negative pressure measurement, the
“High” pressure port should be vented to atmospheric pressure.
7. MAINTENANCE
Calibration
The DFT Series is factory calibrated and should not require calibration out of the
box. Periodically, it may be necessary to recalibrate the gauge to maintain the accuracy of
the product. To “zero” the gauge, remove the pressure connections from both pressure
ports and adjust the zero potentiometer until the output is 4 mA. To “span” the gauge, apply
the full scale pressure to the High pressure port and adjust the span potentiometer until the
output is 20 mA. To properly calibrate the product, it is necessary to have an accurate
pressure standard. If you do not have one available or would like calibration traceable to
NIST, please contact ABUS Technologies Inc.