User’s Guide Chapter 2: Functions 4
Salwico SE3000
Chapter 2: Functions
Power time-out SE3000 is shut down 3 minutes after the last key is pressed or the last test is
executed.
Powered loop SE3000 can not execute a test on a loop if it is under power. Therefore
SE3000 always starts with a check of the loop to see if it is under power. The
test is not executed if this is the case. An error message is displayed and it
remains displayed until the error has disappeared.
Short-circuit loop The communication test is interrupted when SE3000 detects a short-circuit
and an error message is displayed. The error message remains displayed until
the next communication test is executed.
Battery and power supply supervision
The battery and power supply of the test device are continuously supervised.
An error message is displayed when the battery passes a not acceptable power
level.
Loop test When a loop test is performed SE3000 starts at address 1 and searches the
complete loop for all the loop units and their IDs. If a loop unit does not
answer SE3000 tries to recommunicate with it several times.
Each time the test device detects a short-circuit isolator it restarts the loop test
from address 1. The loop test continues until all short circuit isolators have
been activated. If a short circuit is caused by the activation of a short circuit
isolator SE3000 can keep track of all answering addresses by using this
method. An error message is displayed.
When the loop test is finished you may look at a list or a printout including all
the answering loop units and their IDs. You may at any time interrupt the loop
test by pressing the EXIT key (F4).
Loop unit test The loop unit test searches the loop for the specified loop unit. The address
must be in the interval 0 - 255. When it has found the loop unit, it first tries to
get answer from the loop unit. Thereafter it asks for the loop unit ID and it
also checks the address, since each loop unit must have a unique address.
Instead of displaying the ID number SE3000 displays the name of the loop
unit type. A short circuit isolator may be manually activated and its real status
is then displayed in the menu, active or not active. The LED of an answering
unit is flashing.
SE3000 continuously supervise the loop for short circuits.