Specifications

Multi-Zone Gas Monitors
36 P/N: 3015-5074 Rev 10
4.4.6. Clearing the Alarm Event Log
A data log of the last 20 alarm events is retained in memory.
• From the Data Display Screen, press the UP or DOWN arrow key. SETUP will be highlighted in
the first box.
• Press the DOWN arrow key until Alarm Event Log is highlighted, then press ENTER to select this
option and display the Alarm Event Log (see below).
Figure 4-6. Accessing the Alarm Event Log
This screen lists zones in the left column and displays which alarms were associated with each zone as
represented by the vertical cursor bar. As you move the bar horizontally using the LEFT/RIGHT cursor keys,
the date and time the alarm condition was detected is displayed in the upper right hand corner of the display
window.
NOTE: The Alarm Event Log can be reset by pressing a combination of the ENTER and
RIGHT arrow buttons while viewing the log.
4.5. System Faults
4.5.1. Functional Overview
If a system malfunction occurs, the yellow FAULT LED will glow. Additionally, an external alarm device may
activate and an audible alarm may sound if those features have been enabled (see Connecting External
Alarms on page 23 and Audible Alarm on page 26).
The next time the Remote Display polls the affected monitor its yellow FAULT LED will also glow.
Additionally, an external alarm device may activate and an audible alarm may sound if those features have
been enabled (see Connecting External Alarms on page 23 and Audible Alarm on page 26).
Depending on the nature of the fault, the MZ monitor may or may not continue to operate normally. Under a
non-critical fault condition, the MZ will continue to measure and log data, but some peripheral functions may
be compromised. Under a critical fault condition, action is required for the MZ monitor to operate normally.
The table on the following page lists the various fault conditions and explains what action should be taken to
correct the problem. Note that the fault codes are cumulative. For example, a code <4200> is both a
<4000> “REZERO VOLT TOL” and <0200> “GAIN SET FAULT” combined, indicating two simultaneous
faults.