LAR Process Analysers QuickTOC ultra - Programming Tools (Logical Links); Testing the Relays

110 Instruction Manual QuickTOC
®
ultra
IECEx 12E5119
7 How to Work with the Analyser
7.7 Measurement Settings LAR | PROCESS ANALYSERS AG
7.7.3.2 Programming tools (logical links)
• !-Operator
The ! operator is used to invert / negate a condition (! L1 means that the condition is met if the set limit
no. 1 has NOT been exceeded).
• &-Operator
The & operator is used as an AND connection of several conditions (E1835 & E1810 means that the
alarm is issued by the system if both fault messages occur simultaneously).
• |-Operator
The | operator is used as an OR connection of several conditions (E1810 | E1844 means that the alarm
is issued by the system if either or both fault messages occur).
Examples (Alarm):
If the relay is to be set as normally open, it is programmed as follows:
E1810 | E1844 | E1835
If the relay is to be set as normally closed, it is programmed as follows:
! (E1810 | E1844 | E1835)
Example (measurement finished):
The corresponding relay is programmed as follows:
! M1
This programming means that the relay is closed when the measurement of the first sample stream is
completed and remains closed until the next measurement of the first sample stream begins.
7.7.3.3 Testing the Relays
There are two ways of testing the relays:
• Testing the relays using a multimeter
• Checking the programming of the relays via the control center
• Testing the relay with the aid of a multimeter:
1. Open the rear housing part.
2. Set the continuity test on the multimeter.
3. Connect the multimeter on the TRC board to the relay under test (Fig. 22, page 35).
4. Switch the relay under test to "ON" in the relay display.
5. A tone will sound in the "ON" state (if the multimeter can output a sound) and the resistance should
be around 0 ohms.
6. If no sound is heard, check the multimeter.
7. If the multimeter is functional, contact LAR Technical Support (Chapter 15.1 on page 283).
8. After checking the relays, close the rear part of the housing.
Checking the programming of the relays via the control center:
1. Activate the relay by switching the relay to be tested to "ON" or "OFF" in the relay display (depen-
ding on the programming of the relay as make or break contact).
2. Check whether a fault message appears in the control center.
3. If no error message appears, contact LAR Technical Support (Chapter 15.1 on page 283).