PULSAR MEASUREMENT 
 
167 
 
Stability Parameters 
Damping 
Damping is used to damp the display, to enable it to keep up with the 
process but ignore minor surface fluctuations. 
P870 Fill Damping 
This parameter determines the maximum rate at which the unit will 
respond to an increase in level. It should be set slightly higher than the 
maximum vessel fill rate.  Default = 10m/min (32.8084 ft/min). 
P871 Empty Damping 
This parameter determines the maximum rate at which the unit will 
respond to a decrease in level. It should be set slightly higher than the 
maximum vessel empty rate.  Default = 10m/min (32.8084 ft/min). 
Rate 
P874 Rate Update 
This parameter determines the way in which the rate is calculated. If set to 
continuous (P874=0), then the rate is calculated and displayed 
continuously, i.e. any change seen from shot to shot is calculated and 
displayed, but if set to use values P874=1(Default) then the values set in 
P875 and P876 are used to calculate and display the rate. 
P875 Rate Time 
This parameter is the period (in seconds) over which the material level rate 
of change is averaged before the Rate Value (P877) is updated. If the Rate 
Distance (P876) is exceeded before the Rate Time (P875) has expired, then 
the Rate Value (P877) will be updated immediately. Default = 60sec. 
P876 Rate Distance 
This parameter is the rate Measurement Units (P104) over which the 
material level must change before the Rate Value (P877) is updated. If the 
Rate Time (P875) expires before the Rate Distance (P876) is exceeded, 
then the Rate Value (P877) will be updated immediately. Default = 0.05m 
P877 Rate Value 
This parameter displays the current rate of change of material level, in 
Measurement Units (P104) per minute. It is read only.