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KT8R Temperature Controller

Upgraded KT8 models
Improved visibility, operability and performance!

UL/C-UL , CE Approved
CE : EMC Directive
UL : Recognition

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Smooth initial setting and setting adjustment

Operation startup can begin after using initial setting mode to enter the control values required before first use, and after entering values for items such as frequently used and frequently changed settings.
Smooth operation is enabled at initial startup and after changing settings.

Built-in easy programming function

Easy programmed control made possible using nine-step setting procedure. By entering specific target values for each indicated period, freely selectable temperature control is possible.

Example: From start of programmed control
(1):Perform control so it becomes 200 ℃ 392 ℉ after 1 hour.
(2):Maintain 200 ℃ 392 ℉ until after 2 hours
(3):Perform control so it becomes 300 ℃ 572 ℉ after 30 minutes.

ktxr_pic01

 

Fine control of heat capacity

Sampling period rate half (1/2 times) from previous model: high speed 125 ms processing implemented. With twice the responsiveness, it is possible to more finely carry out control, for example, of the heat capacity.

Built-in rearing auto tuning function

The built-in rearing auto tuning function uses the step response method. From temperature rise behavior alone, it can calculate the PID constants. It is possible to calculate constants, even when auto tuning cannot be used to generate them.
Because an ON / OFF operation is unnecessary, there is no disruption in control.

ktxr_pic02

 

Other features

    • Visibility and operability improved with large display and key size.
    • Unit 60 mm 2.362 in approx. long: compact design saves space.
    • With DC current output, can be used as simple signal converter.

Multi-input sensors

Versatile thermocouple, RTD, DC voltage and DC current input for temperature detecting sensors.

Simple operation enables highly accurate temperature control

All required operations can be enabled by the front keys and highly accurate PID control mode ensures an input span of ±0.2 %.

Meets market demands for cost-effectiveness

The KT series offers both economy and high performance.

The KT series complies with UL/c-UL standard and CE marking.

Specifications

Item Specifications
Size 48×96mm 1.890 × 3.780 in
Rating Rating power supply 100 to 240V AC
Rating frequency 50 / 60Hz
Rating power consumption 8 VA approx.
Rating
scale
Input type Input range
Thermocouple K -200 to 1,370℃ (-328 to 2,489℉)
-200.0 to 400.0℃ (-328.0 to 752.0℉)
J -200 to 1,000℃ (-328 to 1,832℉)
R 0 to 1,760℃ (0 to 3,200℉)
S 0 to 1,760℃ (0 to 3,200℉)
B 0 to 1,820℃ (32 to 3,308℉)
E -200 to 800℃ (-328 to 1,472℉)
T -200.0 to 400.0℃ (-328.0 to 752.0℉)
N -200 to 1,300℃ (-328 to 2,372℉)
PL-II 0 to 1,390℃ (32 to 2,534℉)
C
(W / Re5−26)
0 to 2,315℃ (32 to 4,199℉)
RTD Pt100 -200 to 850℃ (-328 to 1,562℉)
-200.0 to 850.0℃ (-328.0 to 1,562.0℉)
JPt100 -200 to 500℃ (-328 to 932℉)
-200 to 500.0℃ (-328.0 to 932.0℉)
DC Current 4 to 20 mA DC -2,000 to 10,000
0 to 20 mA DC
Voltage 0 to 1 V DC
0 to 10 V DC
1 to 5 V DC
0 to 5 V DC
  ・Scaling and change to the decimal point position is possible for DC current input and DC voltage input.
Multi-
input
Thermocouple K, J, R, S, B, E, T, N, PL-II, C (W / Re5-26)
External resistor: Max. 100 Ω (Max. 40 Ω external resistor for B input)
RTD Pt100, JPt100 3-conductor system (Allowable input conductor resistance for each conductor: Max. 10 Ω)
DC current 0 to 20 mA DC Input impedance: 50 Ω
Allowable input current: Max. 50 mA
4 to 20 mA DC
DC voltage 0 to 1 V DC Input impedance: Min. 1 MΩ, Allowable input voltage: Max 5 V, Allowable signal source resistance: Max. 2 kΩ
0 to 5 V DC Input impedance: Min. 100 kΩ,
Allowable input voltage: Max 15 V, Allowable signal source resistance: Max. 100 Ω
1 to 5 V DC
0 to 10 V DC
Control
output
Relay contact (Must be
specified)
1a
3 A 250 V AC (at resistive load), 1 A 250 V AC (at inductive load cos ø = 0.4), Electrical life: 100,000 times
Non-contact
voltage
(voltage output
for SSR drive)
12+20 V DC, Max. load current: 40 mA (with short circuit protection circuit)
DC current 4 to 20 mA DC, Load resistance: Max. 550 Ω
Alarm output 1 (EV1) Relay contact
1a 3 A 250 V AC (Resistive load)
1a 1 A 250 V AC (cosø=0.4)
Electrical life: 100,000 times
Alarm output 2 (EV2) Same as Alarm output 1
Control method PID action (with auto-tuning function), PI action, PD action (with manual reset function), P action (with manual reset function), ON / OFF action
Target temperature setting
Program control function 1 pattern, 9-step setting is possible (However, make function selection setting of either control with fixed set point or program control.)
Indication
accuracy
Thermocouple Within ± (0.2 % + 1 digit) of each input span or within ±2 ℃ (4 ℉) whichever is greater
However, R or S input; within ±6 ℃ (12 ℉) in the range of 0 to 200 ℃ (32 to 392 ℉)
B input, range of 0 to 300 ℃ (32 to 572 ℉): accuracy is not guaranteed.
K, J, E, T, and N input, less than 0 ℃ (32 ℉): within ± (0.4 % ±1 digit) of input span
RTD Within ± (0.1 % + 1 digit) of each input span or ±1 ℃ (2 ℉) whichever is greater
DC current and DC voltage Within ± (0.2 % + 1 digit) of each input span
Sampling period 125ms
Hysteresis (ON / OFF) Thermocouple and RTD: 0.1 to 1,000.0 ℃ (℉)
DC current and DC voltage: 1 to 10,000 (The decimal
point place follows the selection)
Proportional band Input without decimal point: 0 to Input span
Input with decimal point: 0.0 to Input span
DC current and DC voltage: 0.0 to 1,000.0 %
Integral time 0 to 3,600 seconds
Derivative time 0 to 1,800 seconds
Proportional cycle 1 to 120 seconds
Allowable voltage fluctuation When 100 to 240 V AC: 85 to 264 V AC, When 24 V AC / DC: 20 to 28 V AC / DC
Insulated resistance 500 V DC, Min. 10 MΩ
Breakdown voltage Between input terminal and power terminal
Between output terminal and power terminal
1.5 kV AC for 1 min.
Malfunction vibration 10 to 55 Hz (1 cycle/min.), single amplitude: 0.35 mm 0.014 in (10 min. on 3 axes)
Breakdown vibration 10 to 55 Hz (1 cycle/min.), single amplitude: 0.75 mm 0.030 in (1 hour on 3 axes)
Malfunction shock X, Y and Z each direction for 5 times 98 m/s2
Breakdown shock X, Y and Z each direction for 5 times 294 m/s2
Ambient temperature −10 to 55 ℃ 14 to 131 ℉
Ambient humidity 35 to 85 % RH (No condensation)
Mass 160 g approx.
Waterproof IP66 (applicable only to the front panel subject to rubber gasket employed)
Display character height PV: 14 mm 0.551 in
SV: 14 mm 0.551 in
Option
functions
Heating /
Cooling
control
Relay contact Using EV2 assigned setting, use for heating and cooling control is possible.
Non-contact
voltage
Heater burnout alarm
output
Communication function
Accessories Installation frame /
Mounting bracket
Included with controller
Terminal cover Sold separately
Rubber gasket Included with controller