ABUS Technologies DPSENSE-V Series Multi-Range Air Velocity Transmitter - Manual (Page 10)

ABUS TECHNOLOGIES INC.
10
DPSense
According to the different output selections, then the analog output should be 0V or 4 mA or
near. Hold the buttons of “ZERO” and “SPAN” simultaneously and press them for down and up for 2
seconds or less until the value in the voltmeter or milliammeter reads 0.00V or 4.000 mA. Then Hold the
buttons of “ZERO” and “SPAN” simultaneously again for 2 seconds or less, the reset reading is stored,
the LCD displays:
Hold the button of “SPAN” for more than 4 seconds, and then the reading will recover to the
normal value. The analog output reading now should show the right process value. The analog zero and
full scale reset can be done separately or in different time, they also have nothing to do with the
pressure source, because the analog zero and full scale calibrations are independent.
8.3 Analogue Span Calibration
Connect the voltmeter or milliammeter to the output of the transmitter in a right way. Hold the
“ZERO” button for 2-3 seconds, LCD will display:
Hold the “ZERO” button again for 2-3 seconds, LCD displays:
According to the different output selections, then the analog output should be 10V or 20 mA or
near. Hold the buttons of “ZERO” and “SPAN” simultaneously and press them for down and up for 2
seconds or less until the value in the voltmeter or milliammeter reads 10.00V or 20.000 mA. Then Hold
the buttons of “ZERO” and “SPAN” simultaneously again for 2 seconds or less, the reset reading is
stored, the LCD displays:
Recover it to normal condition in the same way of zero calibration.
8.4 Filter Time Constant Adjustment
If the LCD is installed, the filter time constant of output can be adjusted by the user from 0.5-15
seconds in 1-second increments. This function is designed to reduce the noise produced by the
unstable pressure in some noisy air. Under the normal operating condition, hold the “ZERO” button for
2-3 seconds, LCD displays: