21
Start-up and Shutdown
The start-up and shutdown sequences are outlined below and feature reproductions of the display screens
the instrument operator will see during these processes (see Table 3.3). Instructions accompany any
display screen where the instrument operator must press a button to proceed.
The instrument operator may be prompted to complete the time- and date-setting tasks during start-up.
This may happen after a battery has been removed or changed. If prompted by the unit to do so, it is
essential—for data log accuracy—that the time- and date-setting tasks be completed. The data log plays an
important role in preserving operator safety and in the prospective investigation of an incident.
The instrument operator may be prompted to enter a security code during shutdown. This will occur if the
unit is configured for "always-on" operation and is security-code protected.
Table 3.3 Start-up and shutdown
Press and hold for three seconds, then release to initiate the start-up sequence and power on the unit.
• The instrument performs a self-test during start-up.
• If all start-up diagnostics pass, the audio, visual, and vibration indicators turn on then off. Several
start-up screens display, followed by an audio beep to the home screen.
• If any start-up diagnostic fails, an error message displays (see also "Chapter 5, alarms, warnings,
and notifications").
• To access Configuration mode, press and hold and at the same time, during the alarm
information screen cycle.
—
calibration date shown
above)
Gas Information screens (H
2
S shown.)
Calibration gas setpoint Gas-alert setpoint
(If enabled)
Low alarm setpoint High alarm setpoint
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