ABB SM3000 User Manual page 79

SM3000
Multipoint Videographic Recorder
The instrument can be configured to sample all recording channels in the group and store the data in internal memory and external
archive media (if archiving is enabled) at two rates, Primary and Secondary.
The Primary sample rate is active during normal process operating conditions and is set typically to a relatively slow rate (depending
upon process recording requirements) in order to maximize internal memory and external archive media capacity.
The instrument can be configured to switch to a faster, Secondary sample rate when a selected digital source becomes active in
order to record the maximum amount of detail for the period in which that source is active, or may be switched manually – see
Section 5.4, page 43.
•1 A new internal data file for all the recording channels in this group is created if this parameter is changed. All historical data stored
internally for these channels is lost.
IM/SM3000–EN Rev. L
Set the Primary sample rate to between 0.1 seconds and 720
•1
minutes (12 hours). The table below compares example sample
rates with the equivalent chart speeds of a traditional chart
recorder together with the storage capacity of internal memory.
Refer to Appendix C on page 170 for full details of internal
memory and external archive media storage capacity.
Equivalent Chart
Sample Rate
1 second
3 seconds
6 seconds
12 seconds
36 seconds
72 seconds
Notes.

Sample rates are set using one of the following
combinations of units:
– Minutes or minutes and seconds
– Seconds
– Tenths of seconds (minutes and seconds must first be
set to zero).

The rate at which data is displayed in the Chart View
(screen interval [Horizontal and Vertical Chart View] or
chart duration [Circular Chart View]) is set separately – see
Section 6.5.2, page 78.

The sample rate determines the maximum screen interval/
chart duration that can be selected – see Table 4.1 on
page 17.
Set the Secondary sample rate to between 0.1 seconds and
•1
720 minutes (12 hours).
Select a signal source to enable switching between the primary
•1
and secondary sample rates. Refer to Appendix A on page 129
for a description of the available sources.
Note. This signal is edge-triggered. A rising edge (inactive to
active) switches to the secondary sampling rate. A falling edge
(active to inactive) switches to the primary sampling rate.
Secondary
6 Configuration
On-board Storage
Speed Time (6 Channels)
720mm/h 5.5 days
240mm/h 16.4 days
120mm/h 1.1 months
60mm/h 2.2 months
20mm/h 6.6 months
10mm/h 13.2 months
Primary
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