Delta OHM HD2817T Series, Manual

Page: 38 / 64

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11.2. Numerical example
Let’s suppose you need to set the relay RL1 as in figure 3 of the previous paragraph. The
parameters to be set are summarized in the following table:
Parameter Value
Control physical quantity Temperature
High threshold A = 100.0°C
Low threshold B = 50.0°C
Hysteresis H = 5.0°C
Procedure
1. Press MENU, use the
 
arrows to select “ Conf. Out ”, confirm with ENTER.
2. On the next screen, use the
 
arrows to select the “ Output Relay” item and confirm
with ENTER.
3. Use the
 
arrows to select the relay 1 “ Relay RL1 ” and confirm with ENTER.
4. Use the
 
arrows to select the first line “ Mode ”, confirm with ENTER.
5. Use the
 
arrows to select the physical quantity associated to the relay RL1: “ T.
Temp .”, confirm with ENTER. An asterisk will appear near the “ T. Temp .” item. Press ESC
to return to the previous menu.
6. Use the
 
arrows to select the “ Act Above ” line and access the high threshold setting,
confirm with ENTER.
7. Press ENTER to select the “ Set value” line, and use the
 
arrows to set the 100.0 value.
Press ENTER to go to the “ Status” line. Use the
 
arrows to select “Active” . Press ESC
to return to the previous menu.
8. Use the
 
arrows to select the “ Act Below ” line and access the low threshold setting,
confirm with ENTER.
9. Press ENTER to select the “ Set value” line, and use the
 
arrows to set the 50.0 value.
Press ENTER to go to the “ Status” line. Use the
 
arrows to select “Active” . Press ESC
to return to the previous menu.
10. Use the
 
arrows to select the “ Hysteresis ” line and access the hysteresis setting,
confirm with ENTER.
11. Press ENTER to select the “ Set value” line, and use the
 
arrows to set the 5.0 value.
Press ENTER to go to the “ Status” line. Use the
 
arrows to select “Active” . Press ESC
to return to the previous menu.
12. Use the
 
arrows to select the “ On Error ” line to set the relay behaviour in case of
temperature measurement error.
13. Use the
 
arrows to select “ Inactive ” and confirm with ENTER.
14. Press MENU to exit the menu and return to measurement mode.
The procedure is complete.
11.3. Alarm relay RL3
The alarm relay RL3 is energised in case of malfunctioning of one or more sensors and/or
malfunctioning of one or more analog outputs.
Possible alarm causes are:
Sensor error (temperature or humidity),
Probe not communicating with the instrument (possible SICRAM2 module fault),
Unexpected type of probe (wrongly connected, e.g. a SICRAM module probe instead of a
SICRAM 2 module probe),
Probe disconnected,
Faulty probe,
Error of one or more analog outputs because the set limits have been exceeded. An analog
output gives an error if the associate quantity falls outside the set measurement limits: for
example, if the limits of output 2, associated to temperature, are 0°C = 4mA and 100°C =