Instruction manual

120-00004 REV A 10/6/2011 4000 DIGITAL MANUAL PAGE 4
Designation Function
LCD Display: Indicates gas level when function switch is in
ZERO or SAMPLE, and battery level when
on BAT. TEST A or B.
ALARM Light: LED. Flashes ON/OFF when alarm set
point is exceeded.
ALARM SET: 25-Turn potentiometer with a screwdriver
adjustment. Sets the alarm trip point at the
desired gas level. (low alarm set must be
greater than 5% of the full scale).
SPAN/CAL: 25-Turn potentiometer with a screwdriver
adjustment. Sets display to correspond to the
concentration of the calibration gas used for
calibrating the instrument or to the level
specified on ECS certificate. Note: The ECS
certificate is only provided if you
purchased the ECS program.
FUNCTION SWITCH: Rotary switch as follows:
OFF: Analyzer power is OFF.
ZERO: Analyzer power is ON (pump is OFF).
SAMPLE: Analyzer power and pump are on. Also in
this position (depending on the gas model)
the analyzer is zeroed. Sample
measurements and calibration are
accomplished in the sample mode.
BAT. TEST A: Indicates state of charge of the Nickel-
Cadmium (NiCd) batteries on the LCD
Display. These batteries power the pump &
alarm. Recharge if the LCD Display level
falls to or below 100 (ignore decimal point).
BAT. TEST B: Indicates state of charge of the “C” size
alkaline batteries on the LCD Display. These