AC, DC meters configuration

Owned by Vasily T.
Last updated: Oct 26, 2023 by Vladimir Tayzhev
2 min read

To configure transceivers VT407, and VT406 with current meters HAT-100Q1 and HOS-100Q1 or voltage meter VT410, go to the "Main menu" >> "System tree" and click on the appropriate sensor element in the tree. A modal window with sensor properties will pop up. Change the needed settings like Name, User-defined type (current), Expression formula, and alarm settings levels, and click "Save" or "Apply" at the bottom of the "Properties" window. After saving the type of sensor in the system tree in front of a sensor element user can see Amps, Volts, frequency, and so on.

 

In the figure, You can see the AC current transducer with K = 20. Sensor VT410 on the 75V has K ~ 15, and transceiver VT407 with hall current sensor HAT-100Q1 on 100A has a value of K ~20.

To save properties in the device flash memory press "  "  then "OK" to confirm. 

All meters include:

1

Name

The name is given by the system automatically. You can change it to anything you want.

2

Group

Groups are manually created by the administrator in the "Group tree" menu.

3

ID

System ID of the element

4

Type

4-20mA sensor or 0-5V voltage sensor

5

Class

analog

All meters have threshold controls:

In the picture above there is a current transducer, the coefficient is not still written. If a VT420 4-20ma current meter is used with some equipment, for example with a wind meter, or with an Ultrasound depth meter (for Benzin tans, for example), the user needs to use a special formula to calculate wind speed or volume in a liter, cubic meters and so on. 
If necessary, the formula needs to enter the conversion (Example: x / 2-b, or sqrt (x) + b) value and to designate the name of the connected sensor (Liters, speed, or something else depending on the sensor installed.)

By default, the sensor is equal to the measured value: "x", ie corresponds to the expression "x".
To calculate the indirect value of the sensor is possible to use an arbitrary expression, which allowed "(", ")", and:

  • operators: "+","-","*","/","%"(remainder after division),"^"(exponentiation);

  • functions: "abs", "sqrt", "exp", "ln", "log", "sin", "cos", "tan", "asin", "acos", "atan";

  • constants: "pi" (3.1415926...), "e" (2.7182818...);

  • point is used as a decimal separator (3.14).

For example: "2.123*x+123.111"

All monitoring systems have built-in sensors value hysteresis!