RKC INSTRUMENT THV-1 - Advanced Output Control Features; Gradient Setting Function; Output Limiters and Base-Up Setting; Phase Control Output Modes

IMR01M01-E16
18
7.4 Gradient Setting Function
Gradient setting is a multiplier to be applied to output to the
load to adjust the output value depending on an application.
The following two types of gradient setting are available.
• Internal gradient setting set by the THV-1 front keys
• External gradient setting set by the external gradient setter
(external potentiometer)
The output value is adjusted by Gradient setting function as
follows.
• (Output voltage computed by Auto mode) × (Internal gradient
setting) × (External gradient set value)
• (Output voltage computed by Auto mode) × (Internal gradient
set value)
• (Output by manual set value) × (Internal gradient set value) ×
(External gradient set value)
If it is necessary to make only the External gradient set
value valid, set the Internal gradient set value to 1.00.
7.5 Output Limiter High and Low
This function limits the output range.
Output limiter function is related to other functions.
• Output limiter high and low has priority to the output value
1
computed with Gradient setting function.
The maximum output from the instrument will not exceed the
Output limiter high and the minimum output will not go below
the Output limiter low.
• Output limiter high has priority to the output value
2
computed
with Gradient setting and Base-up setting function.
The maximum output from the instrument will not exceed the
Output limiter high.
• When Output limiter low is not set to zero (0), the Base-up
setting function is invalid.
1
Output = (Input signal or Manual set value) × (Gradient set value)
2
Output = (Input signal or Manual set value) × (Gradient set value) +
(Base-up set value)
7.6 Base-Up Setting Function
Base-up setting function adds positive bias to the output value
computed with Gradient setting function. Set the Base-up set
value to a value not exceeding the Output limiter high.
• Base-up setting is valid only when Output limiter low is set to
zero (0).
• Output limiter high has priority to the output value computed
with Gradient setting and Base-up setting function.
The maximum output from the instrument will not exceed the
Output limiter high.
*
Output = (Input signal or manual set value) × (Gradient set value) +
(Base-up set value)
7.7 Output Mode for Phase Control
When Phase control is selected for a linearity (R: Resistance) load, one of the following four output types can be selected.
The factory set value is proportional square voltage (electric power) to input.
(The output mode setting is invalid when the Control method is Zero-cross control.)
4 12 20
0
50
100
Input signal (mA)
Phase angle ratio (%)
Proportional phase angle to input
4 12 20
0
50
100
Input signal (mA)
Effective voltage (%)
Proportional voltage to input
4 12 20
0
50
100
Input signal (mA)
Electric power (%)
Proportional square voltage
(electric power) to input
4 12 20
0
50
100
Input signal (mA)
Current (%)
Constant current control
Continued on the next page.
100
80
60
40
20
0 25 50 75 100
0
20
40
60
80
100
→ Input signal (%)
1.00
0.80
0.60
0.40
0.20
0.00
External gradient scale
Internal gradient
set value
Gradient output characteristics
→ Output (%)
Base-up setting 20 %
0 25 50 75 100
20
40
60
80
100
→
Input signal (%)
→ Output (%)
80.0 %
Output limiter high
10.0 %
Output limiter low
0 25 50 75 100
20
40
60
80
100
→ Input signal (%)
→ Output (%)