ELM Troubleshooting Guide for Vigilant
ELM Troubleshooting Guide for Vigilant
1.0 Overview
2.0 How Level Alarms Work
3.0 Clearing ELM Level Alarms
3.1 Clear Alarms at the ELM
3.2 Clear Alarms from the Web-Interface
4.0 Troubleshoot Erroneous Level Alarms
4.1 Confirm Sensor Placement
4.2 Confirm Proper Measurement Mode
4.3 Verify Sensor Voltage
4.4 Move ELM Sensor
4.5 Replace ELM Sensor
5.1 How to Check Temperature Setting
5.2 How to Change Temperature Setting
1.0 Overview
This guide covers troubleshooting steps for the ELM electrolyte level sensor when used with the
Vigilant monitoring system. It will cover all the possible steps to troubleshoot a sensor that is in
alarm, starting with the most likely to least likely causes.
2.0 How Level Alarms Work
Before troubleshooting the ELM it's important to understand how alarming works. The ELM is
independent from the Vigilant system in that each sensor has functions that can operate without
input from the Vigilant. The Vigilant reads the alarm state of the ELM to then register an alarm on
the system.
ELM Sensor Level Detection
The ELM sensor measures the electrolyte level by using two infrared sensors.
When the ELM sensor detects a low level, it will delay the alarm by 45 minutes to prevent
false alarms.
When the ELM sensor goes into alarm, the Level LED will turn red.
The ELM sensor will remain in alarm indefinitely, even if the water level is refilled.
The
sensor must be recalibrated to clear the alarm (steps outlined below).
Vigilant Alarming
The Vigilant reports ELM alarms based on a series of polls taken of each sensor.
The Vigilant polls the ELM every 90 minutes to see if there's an alarm.
