
16
Figure 7 shows the effect of the deadband setting in the
DS
command. If a deadband of ±0.02% FS is selected, then
the pressure output will not change reading as long as it is within this limit (±2.4hPa for a 1200 hpa unit). If the
pressure exceeds or falls below this threshold, the pressure reading will track the actual pressure value. It will
continue to track the pressure value until there is no change again within the threshold limit.
Figure 8 illustrates the effect of the Idle Count (
IC
) command for four different pressure curves. The
IC
command
does nothing more than skip over a set number of readings. If the idle count were set to
IC=4
, then after a pressure
output reading, the HPB would not output the next 4 readings and the fifth one would become the next output
reading. This feature allows the reading rate to be established different from the integration time. This feature is
useful for minimizing the communications traffic on a network of many HPB units.
Figure 9 illustrates the Synchronize Integration cycle (
SI
) command as well as the Transceiver Operating parameters
(
TO
) options that affect it. This is only for units configured to multi-drop operation.