Druck DPI 530, User Manual

Page: 29 / 45

DPI 530 User Manual 23
K162 Issue No. 2
3.2 Controlling a Pressure (Figure 3-2)
The set-point adjuster controls the output of the instrument and can set a
level between 0 and 100% full-scale. The span divider keys, can be set to
select a controlled output of between 1 and 100% of the current set-point.
Each span divider key can be individually preset by a corresponding
potentiometer of the current set-point between 1 and 100%.
3.2.1 Setting an Output Pressure
To set up an output pressure, proceed as follows:
Switch the power supply on and check the LED illuminates green.
Press the set-point/span divider selector to select set-point adjuster.
Turn the set-point adjuster fully counter-clockwise.
Connect the pressure output port to the system as required and turn the source
pressure ON.
Press the mode switch to select control mode.
Check that the display reads zero.
Turn the set-point adjuster to the required value, the Ready LED extinguishes.
When the controller reaches the set-point the Ready LED illuminates.
3.2.2 Use of Span Divider Keys
After setting an output pressure, the set-point can be divided into preset steps by
using the span divide keys as follows:
Press the set point/span selector switch to select span divider keys.
Press the required span divider key, when the controller reaches the new set-point,
the Ready LED illuminates.
If necessary, use the span adjuster potentiometer to adjust for the required value.
To set other span divider ratios, press the required key. If necessary, use the
appropriate span adjuster potentiometer to adjust for the required value.