16 • Instrument Description
Gas Tracer Operator’s Manual, CSA Version
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 Gas
Tracer’s program modes.
Control Buttons
Five control buttons are located below the LCD. They are arranged 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 Gas Tracer 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.
Alarm LED Arrays
Three red alarm LED (light emitting diode) arrays are visible through frosted
plastic lenses in the case. One is on the top front, one on the left side, and one on
the right side. The alarm LED arrays alert you to gas, low battery, and failure
alarms.
Table 2: Gas Tracer Control Button Functions
Button
Function(s)
POWER ENTER
• turns the Gas Tracer on and off.
• used during setup and calibration.
RESET SILENCE
silences and resets audible alarm if the Gas Tracer is
programmed for latching alarms and the alarm silence option is
on
1
DISPLAY (ADJ)
• activates Display Mode
• enters instructions into the Gas Tracer’s microprocessor
AIR
▲
• activates the demand-zero function (automatically adjusts the
Gas Tracer in fresh-air conditions)
• scrolls through the display and settings modes
(SHIFT)
▼
• scrolls through the display and settings modes
• enters instructions into the Gas Tracer’s microprocessor
1
The Gas Tracer’s alarms are user-adjustable. See “Chapter 6: Maintenance Mode” on page 111.