Low Voltage Warning; Clock Battery; Data Protection While Power Is Off; Instrument Operation - WatchGas NEO User Manual

D e t e c t i o n D e t e c t i o n

3.1 LOW VOLTAGE WARNING

When the battery's charge falls below a pre-set voltage, the instrument warns you by beeping
once and flashing once every minute, and the battery icon blinks on and off once per second.
Turn off the instrument within 10 minutes and recharge the battery.

3.2 CLOCK BATTERY

An internal clock battery is mounted on one of the instrument's printed circuit boards. This long-life
battery keeps settings in memory from being lost whenever the Li-ion battery or alkaline batteries are
removed. The backup battery lasts approximately five years, and must be replaced by an authorized
WatchGas service technician. It is not user-replaceable.

3.3 DATA PROTECTION WHILE POWER IS OFF

When the instrument is turned off, all the current real-time data, including TWA, STEL and peak
concentrations are erased. Logged data are stored in non-volatile memory. Logged data is secure,
even when the battery is disconnected.

4. Instrument Operation

The NEO gives real-time measurements and activates alarm signals whenever the detected
concentrations exceed preset alarm limits.
The instrument starts up in Basic User Mode. In Basic User Mode, no changes can be made to its
operation.
In Configuration Mode, settings can be changed. Configuration Mode is password protected. Via the
WatchGas Suite software, Configuration Mode can be made inaccessible. See also 6.2.2.
Notes:
• Part of WatchGas Quality Assurance is a full factory calibration and pre-set alarm limits.
• Prior to factory shipment, the instrument is preset with default alarm limits and the sensor is pre-calibrated
with standard calibration gas. However, the instrument should be tested and the calibration verified before the
first use.
• Check the alarm limits before using the instrument.
• Place an inlet filter before using the instrument.
• Charge the battery fully before using the instrument.

5. Basic User Mode

5.1 TURNING THE INSTRUMENT ON

OK
Ent Esc
Press and hold until the display, buzzer and alarm LEDs turn on, then release.
After that:
• The display shows firmware version and serial number.
• The instrument performs a number of self-tests for the correct functioning of the pump, clock,
datalog, motion sensor and PID sensor.
• The instrument shows sensor information and instrument configuration.
• The display shows the readout screen.
The instrument is now fully functional and ready for use.
NEO Photoionization Detector
6
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