PTE-50-CET
Sheet 15
The
MODE
key exclusively controls them.
c) PULSE Mode indicators
These 2 LEDs indicate the
Timer
is in the PULSE MEASUREMENT
MODE, and whether the pulse is positive or negative. These pulses are
measured through the
Signal Monitor
taps.
These 2 LEDs are green and 3 mm. Only one can be active at the same time.
When the upper LED is lit, it indicates the
Timer
will read an active or positive pulse
measurement.
When the lower LED is lit, it indicates the
Timer
will read a non-active or negative pulse
measurement.
Both of these LEDs are controlled by the
Mode
key and can only be active when the
Timer
is in the EXTERNAL Mode.
3.2.2.2. TIMER SIGNAL indicators
These are two green and 3mm LEDs. Only one can be active at the same time.
When the
Int.
LED is lit, the timer will start /stop with internal signals from the unit,
such as:
•
Activating ON/OFF in any channel.
•
Activating
a
Step to 2
nd
Value
in any channel.
When the EXT LED is lit, the start signals are produced externally, and introduced in the
Monitor 2
located above the
Timer
display. At the same time the
Timer
should be set in the PULSE mode in
Monitor 1
.
3.2.2.3. Timer reading
The timer reading has 5 digit, 7 segment LEDs and 0.3
inches in height. There are two possible readings:
•
S
: time in SECONDS.
•
Cy
: NUMBER OF FREQUENCY CYCLES IN
ALTERNATING CURRENT.
The
Timer
display can only make 1 stop and start event, and cannot be used again until the
Reset
key is pressed.
3.2.3. CONNECTORS: Monitor Signal
This BNC connector is associated with a 3 mm, yellow LED. This input allows
only a dry contact, voltage free. When the input is closed the LED will light up
indicating the
Monitor
is active.
In the
Manual Mode
this input is used to start the timer from an external signal.
