RKI Instruments GX-2003 Manuale utente

1. Turning the GX-2003 ON

a. Attach the rubber nozzle or sample hose to the GX-2003’s

quick connect inlet ﬁtting.

b. Attach probe to hose as necessary.

c. To turn on the GX-2003, press and brieﬂy hold down the

POWER/ENTER button until you hear a beep. The GX-2003

will begin its warm up sequence, and display the following

screens:

USER/STATION ID

• The USER/STATION ID screen displays for a few

seconds.

CAL TIME REMAINING (factory default setting)

• If the instrument is overdue for calibration the GX-2003

displays: CAL DATE PAST, CAL IS REQUIRED. Press

the RESET SILENCE button to continue.

• Calibration should be performed as soon as possible.

DATE/TIME/BATTERY LEVEL

• This screen displays the current date, time and an

indication of how much battery charge remains. If the

battery icon is fully ﬁlled in black, then the batteries are

fully charged.

Note: Check battery level by observing the battery

icon on the LCD. If battery level is low, replace alkaline

batteries or recharge Ni-MH battery pack before use.

SENSOR FAILURE

• If the GX-2003 experiences a sensor failure during start

up, the LCD will indicate the failed sensor in brackets.

Example FAIL SENSOR <H2S>. To continue operation

press and release the RESET SILENCE button to

acknowledge the failure. Gas readings for that sensor will

be replaced by XXX’s.

• It is necessary to replace the sensor and recalibrate

before the GX-2003 is used.

2. Measuring Mode Screen

a. After warm-up the GX-2003 will display the following: CH4

0%LEL, OXY 20.9 VOL%, H2S 0.0ppm, CO 0ppm.

b. If the unit is not displaying fresh air values as above, it is

necessary to perform a Demand Zero.

Quick Reference Guide For Model GX-2003

Note: Turn on and adjust the GX-2003 gas monitor in a known fresh air area.

3. Performing a Demand Zero

a. Performing a Demand Zero will set the CH4, CO and H2S

channels to zero and the OXY channel to 20.9%.

i. Take instrument to a fresh-air area, where the air is free of

toxic or combustible gas and has normal oxygen (20.9%).

ii. Press and hold the AIR button. The display will prompt

you to hold the AIR button.

iii. Continue to hold the AIR button until the display prompts

you to release the AIR button. The GX-2003 will

automatically set the fresh air readings for all channels.

iv. The GX-2003 is now ready for use.

4. Breath Test

a. If connected, remove hose and probe.

b. Exhale near the inlet ﬁtting of the unit. Observe that the

oxygen reading drops below the alarm setting of 19.5 % O2,

and the audible and visual alarms are activated.

c. Press the RESET button to reset the alarms, and re-connect

hose and probe.

5. Flow Integrity Test

a. Place ﬁnger over end of probe or rubber tip, the

GX-2003 should go into ﬂow fail in a few seconds.

b. Press the RESET button to restart the pump.

c. If the instrument fails to indicate ﬂow failure, check probe

and hose connections for leaks.

6. Remote Sampling

a. When sampling from a remote location such as a vertical

manhole, allow one second lag time per foot of sample line

for transport of sample from each depth tested.

b. One second for each foot of tubing = time spent at each

depth being tested for atmospheric hazards.

Example: 25’ of hose = 25 seconds at each depth being tested.

7. Turning the GX-2003 OFF

a. Press and hold the POWER ENTER button until GOODBYE

appears on the display. The GX-2003 will now turn OFF.

Quick Reference Guide For Model GX-2003

PN 71-0122RK Rev A

RKI Instruments, Inc. 33248 Central Ave, Union City, CA 94587

Phone (510) 441-5656 • (800) 754-5165 • www.rkiinstruments.com

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