2.3 Viewing Optional Displays

The Main Screen appears at instrument turn-ON.

Optional displays can be viewed by pressing the ▼ button to move to:

2.3.1 Bump Mode

To select the Bump mode, press the button
To move forward, press the ▼ button.
To move backward to the Main page, press the ▲ button.

2.3.2 Peak Readings (PEAK page)

The peak icon shows the highest levels of gas recorded by the instrument since turn-ON or since peak readings were reset.

To reset the peak readings:

1. Access the PEAK page.
2. Press the ▲ button.

2.3.3 Minimum Readings (MIN page)

This page shows the lowest level of oxygen recorded by the instrument since turn-ON or since the MIN reading was reset.
The minimum icon appears on the display

To reset the MIN readings:

1. Access the MIN page.
2. Press the ▲ button.

2.3.4 Short Term Exposure Limits (STEL page)

WARNING

If the STEL alarm activates, leave the contaminated area immediately; the ambient gas concentration has reached the preset STEL alarm level. Failure to follow this warning will cause over-exposure to toxic gases and persons relying on this product for their safety could sustain serious personal injury or death.

The STEL icon appears on the display to show the average exposure over a 15-minute period.

When the amount of gas detected by the instrument is greater than the STEL limit:

• Alarm sounds
• Alarm LEDs flash
• STEL icon flashes.

To reset the STEL:

1. Access the STEL page.
2. Press the ▲ button.

The STEL alarm is calculated over a 15-minute exposure.

STEL calculation examples:

Assume the instrument has been running for at least 15 minutes:

• 15-minute exposure of 35 ppm:

• 10-minute exposure of 35 ppm and 5 minute-exposure of 15 ppm:

This page can be de-activated through MSA Link.

2.3.5 Time Weighted Average (TWA Page)

WARNING

If the TWA alarm activates, leave the contaminated area immediately; the ambient gas concentration has reached the preset TWA alarm level. Failure to follow this warning will cause over-exposure to toxic gases and persons relying on this product for their safety could sustain serious personal injury or death.

The TWA icon appears on the display to show the average exposure since the instrument was turned ON or since the TWA reading was reset. When the amount of gas detected is greater than the eight-hour TWA limit:

• alarm sounds
• alarm lights flash
• TWA icon flashes.

To Reset the TWA Readings

1. Access the TWA Page.
2. Press the ▲ button.

The TWA alarm is calculated over an eight-hour exposure.

TWA Calculation Examples:

• 1-hour exposure of 50 ppm:

• 4-hour exposure of 50 ppm and 4-hour exposure of 100 ppm:

• 12-hour exposure of 100 ppm:

2.3.6 Time Display

Current time appears on the display in a 12-hour format by default.

A 24-hour format can be selected using MSA Link.

2.3.7 Date Display

Current date appears on the display in the format: MM-DD-YYYY

2.3.8 Last Cal Page

Displays the instrument's last successful calibration date in the format: MM-DD-YYYY.

2.3.9 Cal Due Page

Displays the days until the instrument's next calibration is due (user selectable).

2.3.10 Motion Alert Page

To activate or deactivate the Motion Alert feature, press the ▲ button while the Motion Alert Activation page is displayed. When the Motion Alert feature is active, the r symbol flashes every 3 seconds. The instrument enters pre-alarm when no motion is detected for 20 seconds. This condition can be cleared by moving the instrument.
After 30 seconds of inactivity, the full Motion Alert alarm is triggered. This alarm can only be cleared by pressing the ? button