Old average x 1/2 + new reading x 1/2 (equivalent to 0.08 sec RC time constant).
Old average x 3/4 + new reading x 1/4 (equivalent to 0.15 sec RC time constant).
Old average x 7/8 + new reading x 1/8 (equivalent to 0.3 sec RC time constant).
Old average x 15/16 + new reading x 1/16 (equivalent to 0.6 sec RC time constant).
Old average x 31/32 + new reading x 1/32 (equivalent to 1.2 sec RC time constant).
Old average x 63/64 + new reading x 1/64 (equivalent to 2.4 sec RC time constant).
Old avg. x 127/128 + new reading x 1/128 (equivalent to 4.8 sec RC time constant).
Old avg. x 255/256 + new reading x 1/256 (equivalent to 9.6 sec RC time constant).
Peak Display The maximum (or most positive) reading since that maximum was last reset.
Reset can be via the meter keypad, a control input, or a serial USB command.
For Normal conversions, the displayed value can be the peak of filtered or unfil-
tered readings.
Plug & Play A system where a TEDS sensor and an instrument are automatically scaled as
a system at power on.
Reading The current value displayed by the meter. Readings are updated at
3.75/second in a 60 Hz environment and 3.125/second in a 50 Hz environment.
Reset There are three types of Reset:
Peak and Valley Reset. Achieved by simultaneously pressing the RESET
and PEAK keys.
Latched Alarm Reset. Achieved by simultaneously pressing the RESET and
ALARMS keys.
Meter Reset. Causes the meter to reinitialize and take a tare reading when
set up for auto-tare. Achieved by powering up the meter, pressing the
RESET and MENU keys simultaneously, stepping through all menu items,
grounding an external control input, or supplying an ASCII command. rESEt
is displayed briefly.
Run Mode The normal operating mode of the meter, where readings are taken, as
opposed to the Menu or Recall modes.
Sampling Rate
The rate at which data is collected for further processing. In the SSI, this is
15,360 samples/second.
Scaling The setup process which relates signal inputs to numeric readings in engineer-
ing units (such as psi).
Scaling, Coordinates of 2 Points Method
A scaling method where four numbers are entered manually: low input, desired
reading at low input; high input, and desired reading at high input. The meter
then applies a straight line fit.
Scaling, Reading Coordinates of 2 Points Method
A scaling method that uses actual measurements of low and high inputs. A
known low signal is first applied to the meter, and the desired low reading is
entered. A known high signal is then applied, and the desired high reading is
entered. The meter then applies a straight line fit. This scaling method has the
advantage of calibrating the transducer and meter as a system. The actual
voltage or current at either point does not need to be known.
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