Teracom TCW241, User Manual

Page: 18 / 55

TCW241_R4.17 – October 2022 Page 18
Example:
For humidity sensor HIH-4000-003 following parameter (coming from datasheet) should be set for fine
work:
Unit - %RH
Offset - 0.826
Multiplier - 31.74, the value is
inverted
of slope parameter (1/0.0315);
If the output voltage of this sensor is 3.198V on the monitoring page will be shown 75.28% RH:
75.28 = (3.198 – 0.826) * 31.74
By default and after “Factory default settings” procedure:
Unit - V
Offset - 0.00
Multiplier - 1.00
7.2.3.4. Virtual items
Virtual item is an additional feature that gives the ability to clone a monitored parameter -
analog input or 1 Wire sensor.
For the virtual item, different alarm borders from the original can be set. In this way, more
alarm borders (alarm notifications) can be organized for the same parameter.
The values of Unit, Multiplier, and Offset are presented for information only. They are inherited
from the original parameter and can
’ t be edited.
Virtual items can be used for alarm notifications, in Functions, and for local relay activation.
7.2.3.5. Relay outputs
For every relay, a description up to 15 characters can be set.
For every relay different time for pulse duration can be set. The resolution is 0.1 second.
Every relay can be activated remotely or locally – by a value of the monitored parameter.
By default, all relays are activated remotely and in the field “Activated from” is written
“manual”.
For local activation, alarm conditions for different sources are used. They are set up in section
“Setup - Alarm conditions”. To assign a parameter to relay, following choices are possible:
•
Sxy – “S” stands for “ S ensor 1- Wire”, “x” is a num ber from 1 to 8, “y” is a number from
1 to 2. The relay is activated from the value measured from specified 1-Wire sensor
and rules for ranges specified in “Setup -> Alarm conditions”;
•
“Analog input z” - the relay is activated from the value measured from the specified
analog input and rules for ranges specified in “Setup ->Alarm conditions ” ; z is number
from 1 to 4;