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19 • Measuring Mode, Normal Operation GX-2003 Operator’s Manual

Turning Off the GX-2003, Normal Mode

1. Press and hold the POWER ENTER button.

2. The buzzer will sound and the LCD back light will flash for about

five seconds.

3. Release the button when GOODBYE appears on the display. When

GOODBYE disappears and the backlight turns off, the unit is off.

Measuring Mode, Normal

Operation

The GX-2003 has three operating modes within Normal Mode:

Measuring Mode, Display Mode, and Calibration Mode. This section

describes using the GX-2003 in Measuring Mode during normal

operation.

In Measuring Mode the GX-2003 continuously monitors the sampled

atmosphere and displays the gas concentrations present for its target

gases. In a low-light environment, press and release any button to

turn on the display backlight. See “Updating the LCD Back Light

Time Setting” on page 65 to program backlight duration. If

CONFIRMATION BEEP is turned on in the Setup Mode menu, the

GX-2003 beeps once every 15 minutes to confirm that it’s operating.

Monitoring an Area

1. Start up the GX-2003 as described above in “Start Up, Normal

Mode” on page 14 or “Turning On the GX-2003 in Normal Mode

With All Modes Active”. It is now in Measuring Mode

2. Take the GX-2003 to the monitoring area.

If the tapered rubber nozzle is used, put the nozzle tip in the area

to be monitored.

If the hose and probe is used, put the probe tip in the area to be

monitored.

3. Wait 10 - 15 seconds and observe the display for gas readings. If a

reading is observed, allow the reading to stabilize to determine the

gas concentrations present.

NOTE: Response time increases with the length of the sample hose.

Long sample hoses will require more time to show a response

at the GX-2003. The maximum sample hose length

recommended for the GX-2003 is 40 feet. Consult RKI

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RKI Instruments GX-2003 Betreibershandbuch Seite 26