T&R 200A-3PH mk2, Руководство по эксплуатации и техническому обслуживанию

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1.3.12.1 General Procedure for Timing Tests
To time the operation of any device a basic procedure needs to be followed to set the desired
test current and to carry out the timing test.
•
Connect the device under test to the output of the unit and to the contact inputs as
required. For details of connection configurations, see the applications notes section.
•
Set the timer to ‘off’ mode and the output control to zero. Switch on the output of the
unit, and increase the current or voltage to the desired level.
•
Switch off the output of the unit and select the desired timer mode.
•
Switch on the output of the unit. The timer will reset and then start when the start
condition is met. Any change to the timer switch setting will be ignored once the output
is switched on.
•
The timer will stop when the stop condition is met.
1.3.12.2 Timer mode: OFF
In the ‘off’ mode, the timer has no effect on the operation of the set, and the timer does not
run. This mode is used to set the required current through the test object before a timing test.
1.3.12.3 Timer mode: INTERNAL START
The internal start mode starts the timer when the main output is switched on, and stops the
timer on the first change of contact set 1. When the timer is stopped, the output of the unit is
automatically switched off.
1.3.12.4 Timer mode: 1 CONTACT
In single contact mode, the timer starts on the first change of state of CONTACT SET 1 after
the output is switched on, and stops on the second change on CONTACT SET 1. CONTACT
SET 1 or CONTACT SET 2 can be used in 1 contact mode. If C1 (CONTACT SET 1) is used,
the output is switched off when the timer is started, and if C2 (CONTACT SET 2) is used the
output is switched off when the timer stops.
Current
Contact set 1
Timer
Output ON
pressed and released
t
Current switches
off when contact
changes
Figure 1.9 1 contact mode using CONTACT SET 1 (C1)