Specifications

Setup & SetUp Command 5-11
Small Signal Time Constant
Bits 0,1, 2 specify the filter time constant for small signals. Its values are
similar to the ones for the large signal filter. Most sensors can benefit from
a small amount of small signal filtering such as T = 0.5 seconds In most
applications, the small signal time constant should be larger than the large
signal time constant. This gives stable readings for steady-state inputs while
providing fast response to large signal changes.
Table 5.4 Byte 4 Displayed Digits and Filter Time Constants.
BYTE 4
FUNCTION DATA BIT
76543210
+XXXX0.00 DISPLAYED DIGITS 0 0
+XXXXX.00 DISPLAYED DIGITS 0 1
+XXXXX.X0 DISPLAYED DIGITS 1 0
+XXXXX.XX DISPLAYED DIGITS 1 1
NO LARGE SIGNAL FILTERING 0 0 0
0.25 SECOND TIME CONSTANT 0 0 1
0.5 SECOND TIME CONSTANT 0 1 0
1.0 SECOND TIME CONSTANT 0 1 1
2.0 SECOND TIME CONSTANT 1 0 0
4.0 SECOND TIME CONSTANT 1 0 1
8.0 SECOND TIME CONSTANT 1 1 0
16.0 SECOND TIME CONSTANT 1 1 1
NO SMALL SIGNAL FILTERING 0 0 0
0.25 SECOND TIME CONSTANT 0 0 1
0.5 SECOND TIME CONSTANT 0 1 0
1.0 SECOND TIME CONSTANT 0 1 1
2.0 SECOND TIME CONSTANT 1 0 0
4.0 SECOND TIME CONSTANT 1 0 1
8.0 SECOND TIME CONSTANT 1 1 0
16.0 SECOND TIME CONSTANT 1 1 1
Setup Hints
Until you become completely familiar with the SetUp command, the best
method of changing setups is to change one parameter at a time and to verify
that the change has been made correctly. Attempting to modify all the setups
at once can often lead to confusion. If you reach a state of total confusion,
the best recourse is to reload the factory setup shown in Table 5.5 and try
again, changing one parameter at a time. Use the Read Setup (RS)
command to examine the setup information currently in the module as a
basis for creating a new setup.
For example: Assume you have a D1111 unit and you wish to set the unit