Megger SR-98, Инструкция по эксплуатации

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14
DC VOLTS ( 00.0 V ):
The value displayed is the measured output voltage from the DC
AUX output terminals. The voltage value displayed in the ( 00.0 V ) is the estimated
output for the selected output terminal. The actual output voltage may vary slightly
depending on the actual load. This allows the operator to preset a voltage output
without turning the voltage on. When rotating the Control Knob, the voltage value
changes up or down depending on the direction of rotation.
SEC / CYCLES:
The time displayed in the
SEC
(seconds) display area is the operating
time of the device under test in seconds. The value displayed in the
CYCLES
display
area is the operating time in cycles based normally on either a 60 Hz or 50 Hz time
base. The time base depends on the base frequency set in the
Timer Setup Screen
(see Timer Setup Screen for details on Frequency changes).
60 or 50 Hz:
The frequency displayed in the upper right corner of the display screen
indicates the output frequency of the
CURRENT MAIN
and
AC AUX
output (see
OUT
FREQ
. Under
Timer Setup Screen
). It also indicates what the base frequency is for
timing in Cycles (see
SEC/CYCLES
above).
Ramp:
There are three speeds at which the output can change when rotating the
Control Knob. They are,
Normal
,
Slow
and
Fast
. To change the Ramp speed, use the
cursor arrows to highlight the Ramp window. Rotating the knob either direction
changes the selected ramp rate from Normal to Fast to Slow back to Normal. Once
selected, use the arrow keys to cursor back to the amplitude value that you want to
change and rotate the Control Knob.
Meter:
There are two selections for metered values. They are
RMS
(Root Mean
Squared) or PEAK . The highlighted, metered value displayed can be either of these
two selections. Normally, RMS is required, therefore the defaulted value displayed is
RMS. To change, use the cursor arrows and control knob similar to that described
above for Ramp.
Mode:
There are three selections for the mode of operation. They are
MOM
(momentary), MAINT (maintain) and CA (current actuate). In the MOM mode the
CURRENT MAIN is turned on momentarily for the Delay Cycles time period, which is
defaulted to 4 cycles (see Timer Setup Screen for description of Delay Cycles). This
feature can be changed from MOM to MAINT by pressing the MODE SELECT function
button at the bottom of the screen, see MODE SELECT for description of operation.
START: NONE LATCH
STOP: MON(C) LATCH
: Indicators of the Timer START and STOP gate settings
(see Timer Setup Screen for details of settings). These indicators aid the operator in
knowing what the setup is for the Timer without needing to go to the Timer Setup
Screen . To change the settings, press the TIMER SETUP function button at the bottom
of the screen.