4 logarithmic with clock time, 7 synchronized start for multiple pst's – Campbell Scientific PST3/PST8 Pump and Slug Test System User Manual
Page 25
SECTION 4. TECHNICAL DETAILS
4-4
by the number of data points used each
recording.
Number
Total # of
of Wells
Data Points
Records
1
3
9966
2
4
7475
3
5
5980
4
6
4983
5
7
4271
6
8
3737
7
9
3322
8
10
2990
To calculate the total time to fill the memory, the
execution interval must be considered. Six
different time intervals between samples are
used during the course of the test. During the
first 1000 minutes, 251 recordings are made.
The sixth interval (from the *4 table) is then
used until the test is stopped.
Example: How long will it take to fill the
memory with six wells? A total of 3322 records
can be recorded. The first 251 recordings take
1000 minutes. Assume the remaining
recordings (3322 - 251 = 3021) are all at a 60
minute interval (*4 table). 3021 X 60 = 181,260
minutes = 125 days before memory is filled.
4.6.4 LOGARITHMIC WITH CLOCK TIME
Memory considerations are the same as with
logarithmic elapsed time with the following
exceptions.
Number
Total # of
of Wells
Data Points
Records
1
5
5980
2
6
4983
3
7
4271
4
8
3737
5
9
3322
6
10
2990
7
11
2718
8
12
2491
4.7 SYNCHRONIZED START FOR
MULTIPLE PST'S
Tests on multiple PST units can be started at
the same time in a synchronized start
configuration. To do this, a two wire conductor
must be connected to the C1 and G terminals of
the CR10 wiring panels. To access the wiring
panel, the PST cover plate must be removed by
loosening the thumb screws. Multiple PST units
are linked by attaching C1 to C1 and G to G
between any number of units.
No connectors have been provided in the PST
case for this purpose. In this situation the
external power connectors on each unit could
be rewired to C1 and G rather than the PS12
power supply. Special cables would have to be
built to connect the various PST units.
When ANY PST "recording" switch is switched
to ON, all the PST units will start recording. The
data collection will be according to the individual
switch configuration and *4 mode settings of
each PST unit.
Call the Water Resources Group at Campbell
Scientific for further details.