Controller
 
DB1000 Series
KP1000 Series
KP3000 Series
LT100 Series
LT200 Series
LT300 Series
LT400 Series
 
 OEM Models
 
MJ Series
LT830 Series
 
 by Sizes
 
1/32 DIN
1/16 DIN
1/8 DIN
1/4 DIN
 
LT830 Series Digital Indicating Controllers Download PS Sheet

Special Instruments made for OEM use only.

LT830 series, new digital indicating controller, is
user-friendly 1/16 DIN controllers featuring socket type terminal board, 24V AC/DC power supply, international compliance, and MODBUS protocol communication. The software package provides the ease of parameter setup and data monitoring.
 
Features Models Measuring Ranges Specifications
Input Specifications
Input signals Thermocouples B, R, S, N, K, E, J, T
Resistance thermometers Pt100
DC voltage 0 to 5V
DC current 4/20mA [By using a 250ohm shunt resistor (sold separately) and 5V range (1/5V)]
Measuring range Refer to the list of measuring ranges.
Accuracy ratings ±0.3% of measuring range ± 1 digit (at reference operation conditions)
Reference junction compensation accuracy ±1.0°C (23°C ± 10°C), ±2.0°C (-10°C to 50°C)
Sampling period Approx. 0.5 second
Burnout Up scale (T/C input, RTD input)
Allowable signal source resistance Thermocouples 200ohm or less
Voltage input 1Kohm or less
Resistance thermometers 10ohm or less (per wire) * Resistance of 3 wires needs to be equal.
Input resistance T/C, DC voltage: 1Mohm or more
Measuring current RTD: Approx. 125uA
Measuring input shift
(sensor correction)
Can be set by the resolution being 0.1 times the setting resolution of SV (-1999 to 9999)
Digital filter 0.0 to 99.9 seconds
Scaling Range/scale of DC voltage/current input (-1999 to 9999), optional setting
Scale decimal point 0 to 3
Maximum allowable input range DC voltage: -5V/+8V DC
Resistance thermometers: ±5VDC
Maximum common mode voltage 30VAC
Common mode rejection ratio (T/C input) 130dB or more (50/60Hz) (signal source resistance 1ohm or less)
Series mode rejection ratio (T/C input) 50dB or more (50/60Hz) (signal source resistance 1ohm or less)
Control Specifications
Control cycle time Approx. 0.5 seconds
Control system On-off pulse type PID system
SSR drive type PID system
Control set point 1 set point. 4-digit setting.
Set point limiter Within measuring range
Set point ramp function Set point ramp unit °C/minute (common to rising/falling)
Set point rising ramp 0 to 9999 (0=no operation)
Set point falling ramp 0 to 9999 (0=no operation)
PV start function At SV change, power-on, changing from Ready to Run
Control set point accuracy ratings Relative error to displayed value: ±1 digit
Auto-tuning Standard (Manual setting of PID constants enabled)
PID constants
P: 0.1 to 999.9%
I: 0 to 9999 seconds
D: 0 to 9999 seconds
PID deadband (gap) 0.0 to 9.9%
Anti-reset windup High limit 0.0 to 100.0%
Low limit -100.0 to 0.0%
Overshoot suppression function ON/OFF selectable
Control operation With direct/reverse action switching
Output Specifications
On-off pulse type
Output signal On-off pulse conductive signal (relay "a" contact output)
Contact ratings Resistive load: 100VAC 3A, 240VAC 3A, 30VDC 3A
Inductive load 100VAC 1.5A, 240VAC 1.5A, 30VDC 1.5A
Electrical relay life More than 100,000 times
Pulse cycle Approx. 1 second to 180 seconds adjustable (1 second increments)
Contact protection element Not built-in [If required, add a contact protection element (sold separately) externally.]
SSR drive pulse type
Output signal On-off pulse voltage signal
- At ON: 12VDC ±20% (load current 20mA or less)
- At OFF: 0.8VDC or less
Pulse cycle Approx. 1 second to 180 seconds adjustable (1 second increments)
Output limiter 1 set
High limit: 0.0 to 105.0%  Low limit: -5.0 to 100.0%
Output variation limiter 0.1 to 100.0%
Output preset -100.0 to 100.0%
Run/Ready Run/Ready (control stop, output: control output value at Ready) switchable
Control output at Ready -5.0 to 105.0%
Control at power recover Continuous/Ready switchable
Event Specifications
Event calculation 2 points
Event output point None (standard)
2-points relay output (EV1/EV2) can be added as an option.
Event type Setting to each of Event 1/2
Absolute value alarm High/Low, standby enable/disable
Deviation alarm High/low/high & low, standby enable/disable, FAIL, heater disconnection alarm (option)
Event set point Event 1/2 individual setting
Event dead band Can be set by the resolution being 0.1 times the setting resolution of SV, Setting to each Event 1/2
Event output phase Normal/reverse switchable
Event output at Ready Off/computation switchable
Display Specifications
Display type 4-digit seven-segment LED display, two lines
Status display 5 independent LEDs
Display content
First LED (green display) At operation mode: Measured value (PV)
At setting mode: Parameter item
Second LED (red display) At operation mode: Setpoint (SV)
At setting mode: Parameter
Status LED (red/green) AT(green): Blinks during the auto-tuning is executed.
OUT1 (green): Lights when the control output 1 (heating) is output
OUT2 (green): Lights when the control output 2 (heating) is output
EV1 (red): Lights when event1 is active
EV2 (red): Lights when event2 is active
Automatic return Return to operation mode if any key is not pressed for more than 3 minute in setting mode.
Key lock Locking function of parameters, 4 levels