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K8AC-H

17

Parameter List

The setting items in each mode are called “parameters.” 
Parameters can be switched by using the 

M

 key.

Power supply voltage 
measurement value

*

1

Voltage fluctuation 
compensation standard value

Number of 
CT passes 1

CT ratio 1

Number of 
CT passes 2

CT ratio 2

*

3

Parameter Display 

: Displayed for all models and settings.

: May not be displayed depending on the model or settings.

Setting change protection 

*

3

*

3

*

3

*

2

*

2

*

4

Voltage fluctuation 
compensation standard value

Setting 1 for number of 
effective digits to be displayed 
after the decimal point

Setting 2 for number of 
effective digits to be displayed 
after the decimal point 

init

sini

pini

hys1

hys2

gate

comp

stim

odly

soft

ssht

sopn

hrst

hral

msmd

dsel

psmd

pstm

dsmd

dsrf

u no

 bps

 len

sbit

nct1

ctr1

ndp1

nct2

ctr2

ndp2

prty

goht

al-1

al-2

ct 1

ct 2

sce 

max1

min1

max2

min2

maxs

isc2

isc1

otim

memo

acnt

min5

1234

VfcV

amoV

aspt

wtpt

test

g-lV

Heater 1 current

Heater 2 current

Heater 1
maximum current

Heater 1
minimum current

Heater 2
maximum current

Heater 2
minimum current

Maximum power
supply voltage

(Processing value
display status)

Heater 2 input shift
display current

Heater 1 input shift
display current

Minimum power
supply voltage

Number of
alarm outputs

Processing value
for alarm output

RUN time

Password for
moving to Set
Mode: 0169

Burnout alarm
setting value 1

Heater layer short circuit
detection function

SSR open circuit
detection function

SSR short circuit
detection function

Output ON-delay time

Soft startup time

Startup lock time

Gate input function

Alarm hysteresis 2

Alarm hysteresis 1

Processing value
initialization

All initialization

Set value initialization

Heater control
method

Switchable
display

Power save
mode

Power save 
mode standby 
time

Display mode

Display
refresh time

Unit number

Baud rate

Data length

Stop bits

Parity bit

Gate OFF
output hold time

Protection Mode

Adjust Mode

Run Mode

Measurement

parameters

Set Mode

Setting change protection

1 s min.

1 s min.

1 s min.

3 s min.

P

o

w

er  ON

5 s  min.

Burnout alarm
setting value 2

1 s min.

1 s min.

1 s min.

Test Mode

Gate Mode

1 s min.

An alarm is output if 
the test value falls 
below the burnout 
alarm value 1 setting.

Alarm or detection is 
stopped if the gate 
current value falls 
below the set value.

Note: Displayed only for 

the K8AC-H2

@@@

Heater layer short circuit
alarm set value

*1.

Displayed when the Selectable Protection Level parameter is set to 0.

*2.

Displayed by the K8AC-H

@@

P

@

-FLK.

*3.

If more than five minutes elapses with no operations performed in Protection Settings Mode, Adjust Mode, Set Mode, or for a measurement 
parameter, the status will return automatically to the processing value display. 
If this occurs while settings are in progress, it may cause unintended operations to be performed in Run Mode (i.e., with measurement values 
displayed). Be careful not to allow this to happen.

*4.

Displayed by the K8AC-H

@@

C

@

-FLK.

Summary of Contents for K8AC-H2

Page 1: ...different heater capacities Using heaters with varying heater resistance e g halogen heaters Features High precision Heater Burnout Alarms with High resolution Digital Measurement Burnout Alarm Possi...

Page 2: ...e linked with the control output value from the temperature controller Compatible with Gradient Settings of Power Controllers When using gradient settings with a power controller set a gate current le...

Page 3: ...tput specifi cations Com munica tions output Current input range 0 200 to 2 200 A 2 00 to 22 00 A 20 0 to 200 0 A 100 to 240 VAC ON OFF control SSR control Two current inputs for either single phase o...

Page 4: ...200 ms min Input impedance 4 k min Cyclic and phase con trol 4 to 20 mA DC Burnout detection is possible for an input of 7 mA or greater Input impedance 50 max Outputs Relay contact outputs K8AC H C...

Page 5: ...inals CT primary terminals and gate input terminals communications terminals Between power supply terminals CT primary terminals and output terminals Between gate input terminal communications termina...

Page 6: ...VAC 0 3 A 30 VDC 1 A Maximum contact voltage 125 VAC 60 VDC Maximum contact current 1 A Maximum switching capaci ty 37 5 VA 30 W Minimum applicable load failure rate P value refer ence value 5 VDC 10...

Page 7: ...ct to the operating power supply All models 3 to 4 5 to 6 Outputs Outputs SSR open or short circuit detection results Outputs heater burnout or layer short circuit detection results K8AC H2 N transist...

Page 8: ...CTs for three phase heaters For three phase heaters always set the burnout alarm set values for both CT1 and CT2 5 6 3 4 Transistor Output K8AC H2 N FLK CT2 CT1 3 7 8 9 10 11 12 13 14 1 2 RS 485 X 4 5...

Page 9: ...Transistor Output K8AC H2 N FLK Heater Power supply Power Regulator Temperature Controller 4 to 20 mA current output Operation Description If the heater current detected at either CT1 or CT2 falls bel...

Page 10: ...o after one heater burns out with the current prior to the burnout i e the normal current taken as 1 3 In actual operation there may be effects from factors such as load heater imbalances so conduct a...

Page 11: ...m is output accordingly SSR Short Circuit Detection If current is measured when there is no gate input an SSR short circuit error is detected and an alarm is output SSR Open Circuit Detection If curre...

Page 12: ...Short Open Circuit Alarm Using the Power Regulator s Gradient Settings The power regulator s gradient settings can be used to prevent malfunction by setting the operation gate current level The relati...

Page 13: ...urs 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...

Page 14: ...pe P should be selected Type P is also selected for cyclic control Select the appropriate relay or transistor output specifications depending on the application K8AC H Parameter Settings Procedure Onl...

Page 15: ...open and short circuits and heater layer shorts The count is refreshed each time an alarm is output and it is saved in non volatile memory The value is saved when power is interrupted The number of o...

Page 16: ...r at least 1s Press the L key for at least 1 s Press the S key for at least 1 s Press the L key for at least 1s When the key is released Press the S key for at least 1 s Press the L and M keys Press t...

Page 17: ...etting value 1 Heater layer short circuit detection function SSR open circuit detection function SSR short circuit detection function Output ON delay time Soft startup time Startup lock time Gate inpu...

Page 18: ...ction function ON and OFF ssht ON OFF OFF SSR Open Circuit Detection Turns the SSR open circuit detection function ON and OFF sopn ON OFF OFF Heater Layer Short Circuit Detection Overcurrent Detection...

Page 19: ...following torque Power supply terminals 0 5 N m I O terminals 0 23 N m 35 2 1 1 7 4 5 6 100 90 K8AC H2 FLK To remove a wire insert the recom mended flat blade screwdriver straight into the hole under...

Page 20: ...ories with K8AC CT20L Connection Example Contact Approx 3 dia 18 22 Approx 6 dia Plug Contact Lead Plug 100 15 30 30 5 Two M3 Depth 4 max 12 dia 40 40 5 15 Current Transformer K8AC CT200 Pre wired Lea...

Page 21: ...se unintended operation and may result in accident or corruption of the product 3 Do not use thinner or similar solvent for cleaning Use commercial alcohol 4 When discarding properly dispose of the pr...

Page 22: ...he current measurement value with the heater output at 100 This is because the burnout detection alarm of the K8AC H P FLK depends on the control input When you set the burnout alarm value make sure t...

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