Pro He
TM
Alarm Helium Analyzer
NUVAIR
Page
7
www.nuvair.com
2.1. Controls
2.2. Display
2.3. Alarm
The Analyzer includes an audible and visual alarm that is activated when the Sensor reaches
the alarm set points which are user programmed. The alarm will not clear until the
concentration of He drops below user programmed set points.
2.4. Sensor
The Analyzer uses a “Thermal Conductive” Helium sensor to measure He content in gases.
The Sensor is designed for use at atmospheric pressure (0 P.S.I.). The gas mixture to be
analyzed must be regulated to .5-1.0 LPM, and any potential for pressure or vacuum must be
avoided.
2.5. Batteries
The 9627 & 29628 use one 9-volt battery for power. The battery is located inside the Analyzer
and is user-replaceable. These models can be supplied with a 110/230V power supply.
9-volt battery models should have battery removed any time the Analyzer will be stored without
use for extended periods of time.
Screen will blink alternately from “000” to “bAt” at start up when battery is low.
The “He” rechargeable model uses a “110/230V” charger with a Lithium Polymer rechargeable
battery. A fully charged battery should last up to 24 hours. Recharge takes about 4 hours.
DO NOT LEAVE UNIT UNATTENDED WHILE CHARGING and UNPLUG ONCE CHARGED.
Digital
Display
On/Off Button
Low Battery
Indication
Adjust Button
Relay
Output
Program Button
Helium Reading
0 – 100%
In .1 % increments
