Oval EL1810, Instructions Manual

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E-25-7-E
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10.2 Inspection of Fuse
Remove the fuse cover on the power supply
board and inspect the glass cartridge fuse
(see Sec. 9.3 on pages 24 and 25 for power
supply board removal).
If the fuse is blown, extract from its holder
and replace it with a new one.
NOTE: When you remove and install
a glass cartridge fuse, avoid
gripping it too hard. Too hard a
grip may crush the glass.
CAUTION: Do not use fuses of other rating.
10.3 Dielectric Test Voltage
A surge protector is incorporated in this controller: Do not attempt to conduct a dielectric withstanding
voltage test across power terminals.
10.4 Q&A Controller Behavior in Standby Mode
Questions and answers with the controller EL80 in standby mode (
START
▲
key remains under-
pressed) are given in Table 10.2.
Table 0.2
Questions Answers
. What if a pulse train arrives
in standby mode?
Counts. “TC” segment in LCD display blinks in sync with incoming pulses.
Both the LCD grand total counter and LCD 2 batch counter count.
SV and MV valve signals remain inoperative (remain in the OFF).
•
•
•
2. What if the counter counts
to the target batch setpoint
without pressing the
START?
“END” segment in LCD 1 display comes on with BATCH END OUTPUT across terminals
➈
–
➉
closed.
The counter keeps counting even beyond the target batch setpoint.
However, if overshoot alarm is enabled, “ALARM” segment comes on at that setpoint and
ALARM OUTPUT contacts across terminals – come to close.
To reset, press
RESET
◀
key.
•
3. While the counter keeps
counting without pressing
the START, what happens
if START is pressed?
To restart while a batch process is in progress is inhibited.
Once the counter has started counting, even for a single count, from the initial state, a
transfer to the batch process is inhibited. Press
RESET
◀
key once to return to “0” (initial
state) before you start.
NOTE: Except that frequency reduction d is set to “0” and, at the same time, scale F is
set to any value larger than “”, the counter will remain at “0” in response to just
a single pulse arrival. In this case,
Pressing
RESET
◀
key once again is required.
•
Fig. 10.1 Power Board and Fuse
Power supply board
Fuse cover
Holder
Glass-cartridge fuse
Fig. 10.1 Power Board and Fuse
Power supply board
Fuse cover
Holder
Glass-cartridge fuse