69Chapter 10 Communications
Searchline Excel™ Plus / Searchline Excel™ Edge – Technical Manual
Menu Navigation
Menu options can be selected by highlighting the option and pressing Enter, by pressing the number of the option, or by
double clicking on the option. For more information on how to select menu options please see the instructions for the HART
host device being used.
Error Reporting
Searchline Excel Plus & Searchline Excel Edge implement HART protocol Command 48, meaning that if any event is
detected in the detector while a HART host is connected, it will be reported immediately. Therefore warning messages may
pop up during other operations.
10.2.1Selecting the Gas Reading Units
Select menu Device Settings → 5 System Setup → 8 Configure System → 4 Gas Reading Units
Select from the available options:
0 – (1-ratio) * 100%
1 – LELm
2 – PPMm
10.3Commissioning using HART DTM Communications
Note:
The instructions that follow assume that a suitable HART host is connected to the Searchline Excel Plus &
Searchline Excel Edge and that the user is logged in with ‘Engineer’ profile access privileges.
Introduction
This section explains several operations that may be required during commissioning. The user should work through
First Time Switch On, User Configuration and Configure Device Identification Information, before selecting further
operations as required by the specific installation.
First Time Switch On Verifications required on first power up.
User Configuration How to change settings from the default values:
Change the Password – how to change the password for
‘Engineer’ profile access.
Set the Time and Date - how to adjust the real time clock to local
time.
Configure Warning, Inhibit and Over-range Signal Levels -
how to change the signal levels from the default settings.
Configure Detection Algorithm Mode How to set algorithm mode for gas leak detection
Test 4–20 mA Loop Integrity How to force the mA output to set levels to test the system.
How to check that there is sufficient compliance in the loop to
signal alarm and over-range.
Configure Alarm Set Point How to change the internal threshold used to log gas leak events.
Output Test How to test the system by simulating Alarm, Warning and Fault
conditions for Relay and mA loop.
Clear Latch How to clear alarm latch generated during commissioning.
After changing any parameter, poll the Searchline Excel Plus & Searchline Excel Edge and verify that
the received value is correct.
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