GfG G450 Performance And Maintenance Procedures

G450 / G460 Baery pack performance and
maintenance procedures
TN2013_19_08_16
Tel: (800) 959-0329 or (734) 769-0573
Fax: (734) 769-1888
E-mail: info@gfg-inc.com
Website: www.gfg-inc.com
Interchangeable G450 and G460 rechargeable nickel-metal hydride
(NiMH) and alkaline baery packs are designed to provide up to 25
hours of connuous operaon. NiMH baeries provide excellent
cycle life and low temperature performance, and are warranted for
2-years. The typical G450 run-me aer two years with a properly
maintained NiMH baery pack is usually around 16 hours.
Some types of sensors require more power than others. The
highest power consuming sensors are photoionizaon detector
(PID) sensors, followed by standard catalyc LEL sensors and
infrared (IR) sensors. The power requirements for oxygen and
electrochemical toxic sensors (e.g. CO, H
2
S, SO
2
, NO
2
, etc.) are so
low that they do not materially aect the instrument run me.
The following chart shows the expected run-mes per charge (or
set of baeries) for various heavy-power sensor conguraons.
All conguraons include O
2
and CO/H
2
S sensors as well as the
listed “high power” sensors.
G50 and G460 rechargeable (NiMH) baery packs
provide outstanding operaon me, cycle life and low
temperature performance. Periodic deep discharge
ensures the best possible performance.
The temperature can also have an eect on the operaon me of
the instrument. While high temperatures up to 122°F (50°C) do
not have an effect on operation time, in very cold temperatures the
operaon me becomes shortened. Alkaline baeries should be
avoided when operang temperatures are below 32°F (0°C). NiMH
battery packs provide excellent low temperature performance
down to -4°F (-20°C), and can be used for short periods of me
down to -40°F (-40°C). The following chart shows the expected run
mes for a G450 equipped with a rechargeable NiMH baery pack
and standard LEL, O
2
, CO and H
2
S sensors in various temperature
condions:

GfG G450 Specifications

General

Measuring Range (Combustible Gases)	0-100 % LEL
Resolution (O2)	0.1% vol.
Resolution (CO)	1 ppm
Resolution (H2S)	0.1 ppm
Resolution (CH4)	1% LEL
Display	LCD with backlight
Data Logging	Yes
Operating Temperature	-20°C to +50°C
Protection Rating	IP67
Type	Portable gas detector
Gases Detected	O2, CO, H2S, CH4
Measuring Range (CO)	0-500 ppm
Measuring Range (H2S)	0 to 100 ppm
Measuring Range (CH4)	0 to 100% LEL
Response Time	T90 < 30 seconds
Sensors	Electrochemical (O2, CO, H2S), Catalytic Bead (CH4, Combustible Gases)
Alarms	Audible, Visual, Vibrating
Humidity Range	10-95% RH (non-condensing)
Measuring Range (O2)	0-25 % vol.