One-Point Shift Method; Two-Point Shift Method - Omron E5AZ User Manual

Shifting Input Values
4-1-3

One-point Shift Method

1,2,3...
Adjustment level
Upper-limit
C in5h
temperature
input shift value
10
Lower-limit
C
in5l temperature
input shift value
10
4-1-4

Two-point Shift Method

1,2,3...
54
Infrared
temperature
sensor
−
+
(A) E5EZ Temperature controller
Figure 1 Configuration When Compensating an Infrared Temperature Sensor
1. In the configuration shown in Figure 1, bring the set point to near the value
at which the temperature of the control target is to be controlled. Let's as-
sume that the control target temperature (C) and the control target temper-
ature (B) are matching.
2. Check the control target temperature (B) and the controller readout (A).
Take the following value as the input shift value, and set the same numer-
ical values to "insl" and "insh".
control target temperature (B) - controller readout (A)
Figure 2 shows the effect of one-point temperature input shift.
3. After you have set the input shift values, check controller readout (A) and
control target temperature (B). If they are almost the same, this completes
temperature input shift.
Controller readout (A)
Temperature readout
after shift (e.g. 120°C)
Temperature readout
before shift (e.g. 110°C)
0
Figure 2 One-point Temperature Input Shift
Use two-point input shift if you want to increase the accuracy of the readout
values across the range of the sensor.
1. Shift the controller readout by two points, near room temperature and near
the value at which the temperature of the control target is to be controlled.
For this reason, bring the control target temperature to near room temper-
ature and to near the set point, and check control target temperature (B)
and controller readout (A).
Section 4-1
(C) Control target
(B) Thermometer
After shift
Input shift value (e.g. 10°C)
Before shift
Temperature readout of
control target (B)
Near set point
(e.g. 120°C)