K8AC-H
13
Nomenclature
Nomenclature and Operations
*
Check the specific status using the alarm display parameters on the
main display.
Alarm Indicator
s
Note: 1.
As soon as the cause of an alarm is removed, the alarm is
reset automatically.
2.
If multiple alarms occur simultaneously, the one with the
highest priority is displayed.
3.
If the mode is changed to Adjust or Set Mode while an alarm
is in effect, the alarm output is reset and the ALM and SSR
indicators turn OFF.
4.
If an SSR operation gate current level is set for a model with
phase control or cycle control, alarms will not be output for
SSR short circuits.
Processing Value Display Ranges and Functions
*1.
The decimal point position depends on the input type.
K8AC-H
@
1
@@
: 0.100 to 2.300
K8AC-H
@
2
@@
: 1.00 to 23.00
K8AC-H
@
3
@@
: 10.0 to 210.0
*2.
If the display is below 0100, the bar display “----” will be shown.
Operation
indicators
Main display
area
Shift key
Up key
Down key
Mode key
Level key
K8AC-H2
@@@
-FLK
K8AC-H1
@@@
-FLK
Name
Operation
Main display
Displays processing values, parameter characters,
and set values.
Oper-
ation
indi-
cators
RUN (Mea-
surement
operation)
Lights when the power is turned ON and the
measurement operation is in progress.
OFF at all other times.
ADJ
(Adjust)
Lights while in Adjust Mode.
Flashes while in Test Mode.
OFF at all other times.
SET (Set)
Lights while in Set Mode.
OFF at all other times.
GATE
(Gate)
Lights or turns OFF according to gate input status.
Gate pulse:
Lights for high voltage pulse; OFF for low
voltage pulse.
Gate signal (4 to 20 mA):
Lights for 4 mA or over; OFF for less than 4 mA.
SSR
(SSR error)
*
Lights when an SSR error occurs (open or short
circuit).
OFF when SSR is normal.
ALM
(Alarm)
*
Lights for heater burnout or overcurrent.
OFF at all other times.
Up key
Increments a set value when the set value is in
change status.
Down key
Decrements a set value when the set value is in
change status.
Shift key
Used to check set values while parameters are
displayed, and to put set values in change status.
Used to shift the set value digit when the set value is
in change status.
Mode key
Used to switch the displayed parameter.
Level key
Used to change the level.
Order
of
priority
Alarm
7-segment
display
characters
LED
indicator
Alarm contents
1
Heater burnout 1
hbt1
ALM
indicator lit
CT1 heater
burnout detected.
2
Heater burnout 2
hbt2
ALM
indicator lit
CT2 heater
burnout detected.
3
SSR open circuit
ssro
SSR
indicator lit
SSR open circuit
detected (when
heater current
cannot be
detected with
temperature
control gate
output ON).
4
SSR short circuit
ssrs
SSR
indicator lit
SSR short circuit
detected (when
heater current is
detected with
temperature
control gate
output OFF).
5
Heater layer
short circuit 1
hrs1
ALM
indicator lit
CT1 overcurrent
detected.
6
Heater layer
short circuit 2
hrs2
ALM
indicator lit
CT2 overcurrent
detected.
Processing
value name
Display
characters
Display
range
Unit
Function
Heater 1
current
ct 1
0100 to
2300
*
1
*
2
A
This is the CT1 heater
current processing value.
Alarm operations such as
the heater burnout alarm
are determined based on
this processing value.
Heater 2
current
ct 2
0100 to
2300
*
1
*
2
A
This is the CT2 heater
current processing value.
Alarm operations such as
the heater burnout alarm
are determined based on
this processing value.
