RKI Instruments GX-2003 Operator's Manual download pdf (Page 15)

GX-2003 Operator’s Manual Instrument Description • 8

CO and H

S Sensors

The CO and H

S sensors are electrochemical cells that consist of two

precious metal electrodes in a dilute acid electrolyte. A gas permeable

membrane covers the sensor face and allows gas to diffuse into the

electrolyte. The gas reacts in the sensor and produces a current

proportional to the concentration of the target gas. The current is

amplified by the Model GX-2003’s circuitry, converted to a

measurement of gas concentration, and displayed on the LCD.

LCD

A digital LCD (liquid crystal display) is visible through a clear plastic

window on the front of the case. The LCD display simultaneously

shows the gas reading for all installed sensors. The display also shows

information for each of the GX-2003’s program modes.

Control Buttons

Five control buttons are located below the LCD. They are arranged in

a circular pattern around a central button, the POWER ENTER button.

The DISPLAY (ADJ) button is on the left, the RESET SILENCE button

on the right, the ▲AIR button on the top, and the (SHIFT)▼ is on the

bottom.

Printed Circuit Boards

The GX-2003 printed circuit boards analyze, record, control, store, and

display the information collected. The circuit boards are located inside

the case. They are not user serviceable.

Table 2: GX-2003 Control Button Functions

Button Function(s)

POWER ENTER • turns the GX-2003 on and off.

• used during setup and calibration.

RESET SILENCE silences and resets audible alarm if the GX-2003 is programmed

for latching alarms and the alarm silence option is on

DISPLAY (ADJ) • activates Display Mode

• enters instructions into the GX-2003’s microprocessor

▲AIR • activates the demand-zero function (automatically adjusts the

GX-2003 in fresh-air conditions)

• scrolls through the display and settings modes

(SHIFT)▼ • scrolls through the display and settings modes

• enters instructions into the GX-2003’s microprocessor

1 The GX-2003’s alarms are user-adjustable. See “Chapter 6: Setup Mode” on page 52.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 93 94

No comments

RKI Instruments GX-2003 Operator's Manual Page 15