Delta DT3 User Manual download pdf (Page 7)

For example: Measure Value=25.0; Compensation = 1.2. After applying to the Compensation equation PV=26.2.

Linear Compensation Gain (setting range = 0~0.999). Linear Compensation Gain Calculation equation: PV = Measure

Value* (1 + Gain/1.000) + Compensation.

For example: Measure Value=25.0; Gain= 0.100. After applying to the Gain calculation equation PV= 25.0 * (1 + 0.100 / 1.000) =

27.5。

If temperature deviation is the same in every temperature, settting linear compensation value can solve deviation problem. If temperature

deviation varies upon different temperatures, calculate the linear deviation error and adjusts the temperature by setting Gain and

Compensation value.

 Applications of Analog Voltage & Current Input

The input range of analog voltage and current are used as the uppler/lower limit of the controller’s voltage and current setting. When

setting up the desire voltage or current, it must lies within the range of upper/lower limit. For example: If the range of analog input voltage

is 0~5V, the upper limit setting will be 5000 and lower limit setting will be 0. If the decimal setting is set to 3 decimal place, a input voltage

of 2.5V will displays as 2.500. The equation of Display Value = (Upper limit setting of controller– Lower limit setting of controller)*(Input

voltage- Analog lower limit)/(Analog upper limit– analog lower limit) + Lower limit setting of controller.

 Disable the Cold Junction Function

The cold conjunction function of a thermocouple is set to ENABLE, but in some cases, we can set it to DISABLE.

¾ In Initial Setting Mode,

is used to set the first digit (Y) of Yxxx, (when Y=0, Enable; when Y=1, Disable).

Analog Output Compensation

When the output mode is set to analog current output (4~20mA) or linear voltage output (0~10V), user’s desire output value can be

attained by using compensation function. For example, the analog output 1 can be adjusted in

and parameters in

“Regulation Mode”. The output value can be positive or negative (+/-) and it can be changed by pressing the Up/Down key on the

temperature controller. The scale of each pressing is an increase or decrease of 1uA and 1mV.

For example: To change the current output range from 4~20mA to 3.9~20.5mA, set

to 500 (20.5-20=0.5mA; 0.5mA/1uA= 500).

and set

to -100 (3.9-4=-0.1mA; -0.1mA/1uA=-100).

¾ To control the output manually: Set parameter

to in【Initial Setting Mode】.

¾ To set output to 0%: Set parameter

to or to in【Operation Mode】.

¾ To adjust the lower limit of analog output: Input a desire value and check the meter to adjust the analog input value to desire value

(For example: 4~20 m A, adjusting analog value will be 20 m A). Set parameter

(Output 1) or (Output 2) to your

desire value in 【Regulation Mode】.

¾ To set output to 100%: Set parameter

(Output 1) = or (Output 2) = in 【Operation Mode】.

¾ To adjust the lower limit of analog output: Input a desire value and adjust the analog input value to your desire value (For example:

4~20 m A, adjusting analog value will be 20 m A). Set

(Output 1) or (Output 2) to your desire value in

【Regulation Mode】.

 Retransmission and Compensation Adjusting

When the input value changes, the retransmission output will also be changed correspondingly. For example: If retransmission =

4~20mA ; uppler/lower limit = 100.0 ~ 0. Wen the controller reads 0, it outputs 4mA; when the controller reads 100, it outputs 20mA. The

value can also be a negative number to generate a negative slope. For negative slope, sets upper/lower limit = 0~100.0. In this case,

when the controller reads 0, it outputs 20mA; when the controller reads 100, it outputs 4mA. Refer to the slope diagram below.

Output =

Negative Slope

Output =

Positive Slope

(Figure 1: Propotional Output Diagram)

1 2 3 4 5 6 7 8 9 10 11 12 ... 20 21

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Delta DT3 User Manual Page 7

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