RKI Instruments GX-2003 Operator's Manual download pdf (Page 90)

83 • Calibrating the GX-2003 GX-2003 Operator’s Manual

The GX-2003’s calibration menu includes two methods of calibration:

auto calibration and single calibration.

• Auto Calibration: This method allows you to calibrate the CH

(%LEL sensor only), OXY, H

S, and CO sensors simultaneously. It

is designed for use with the RKI 4-gas calibration cylinder and is

the quickest and easiest method to calibrate the GX-2003.

• Single Calibration: This method allows you to calibrate one sensor

at a time. Use this method if you are only calibrating one or two

sensors, if you are calibrating the %volume combustible sensor, or

if you are not using the RKI 4-gas calibration cylinder.

Calibrating with the Auto Calibration Method

This section describes calibration using the auto calibration method.

To calibrate using the single calibration method, see “Calibrating with

the Single Calibration Method” below.

1. With the cursor next to the AUTO CALIBRATION menu item,

press and release the POWER ENTER button to display the

calibration values screen.

The gas concentrations displayed in the calibration values screen

must match the gas concentrations listed on the 4-gas calibration

cylinder. If all concentrations match, go to step 6. If one or more

concentrations do not match, continue with step 2.

2. To adjust the values on the screen, hold down the (SHIFT)▼

button, then press the DISPLAY(ADJ) button and release both. The

calibration value begins to flash.

3. If necessary, use the ▲AIR and (SHIFT)▼ buttons to set the correct

combustible gas value.

4. Press and release the POWER ENTER button to enter the new

setting. The OXY calibration value begins to flash.

5. Repeat steps 3 and 4 to set the correct values for the remaining

channels. After the last channel is set, you return to the calibration

values screen and the values are no longer flashing.

C CH4 50%LEL

A OXY 12.0VOL%

L H2S 25.0ppm

. CO 50ppm

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RKI Instruments GX-2003 Operator's Manual Page 90