Dwyer DPM - Manual (Page 23)

Particulate Monitoring Systems
Installation & Operating Manual
Document No. 210-1003-M Page 16 ©2007
6.4 Menu 3 Setup
Navigation within Menu 3 is similar to that described in Menu’s 1 and 2. Features designated with an
asterisk (*) are optional. Operation of optional features is dependant upon model and options selected
at the time of order. The following setup menus are based on firmware version 2.27 or higher.
Press the UP and DOWN keys at the same time from the main screen to enter the Menu 3 setup
screen. Use the UP/DOWN arrow keys to adjust a setting to the desired value. Press the ENTER
key to save the value and proceed to the next screen. Press the SETUP/ESCAPE key to return to
the main screen without saving the current parameter’s value.
Menu Item Range Definition
Signal
Filter
Frequency
0.033 – 2.0
Hz
This parameter controls the low-pass filtering of the input
signal. Setting the frequency lower gives a more stable
output reading. Setting the frequency higher gives a more
dynamic output reading. Signal filtering is applied to the
numeric readout only unless bar graph/4-20mA filtering is
ON (see setting below).
* Units of
Measure
1111 pA
2222 mg
This parameter sets the displayed and output units of
measure to be either pA or mg/m 3 . Conversion to mg/m 3
first requires correlation testing and instrument scaling.
Auto-
Range
Delay
1 – 30
Sec
This parameter controls how long the bar graph readout
must be at either extreme before it automatically switches
ranges. If the bar graph is switching ranges too often, the
auto-range delay should be increased.
* Peak Hold
Time
0 – 60
Sec
This parameter sets the amount of time a rapidly
occurring peak reading is displayed. Peak Hold is used
for processes that are very dynamic with spiking
readings.
* Bar Graph
&
4-20mA
Output
Filtering
Yes/No This parameter enables or disables filtering of the bar
graph and the optional 4-20mA output. The filtering
applied is the Signal Filter Frequency parameter listed
above. Filtering is enabled by selecting YES and disabled
by selecting NO.
*
Correlation
Values
MINIMUM
and
MAXIMUM
(EM 70)
0 – 5000
pA1=0
pA2=5000
pA3=0
pA4=5000
These parameters are used to re-scale the output from
pA to mg/m 3 . Raw min/max values (pA1 and pA2) are
entered and equivalent Scaled min/max values (pA3 and
pA4) are entered. The control unit will convert the Raw
values to Scaled values automatically. To remove all
scaling, set Raw min=Scaled min and Raw max=Scaled
max. Example: 0-5000pA = 0-4000mg/m 3
pA1=0, pa2=5000, mg3=0, mg4=4000