Need help?Do you have a question about the GfG G450 and is the answer not in the manual?
NiMH batteries offer excellent cycle life, low temperature performance, and a 2-year warranty.
Chart displays expected run times based on various sensor configurations installed in the instrument.
Graph shows how operating temperature affects the run time of the G450 instrument.
Smart charger with trickle charge mode, available in single/double versions, and 12 VDC vehicle use.
Charger can simultaneously charge both the pump and the instrument.
Smart chargers use fast and trickle charge modes; fully discharged batteries may take up to 6 hours.
Green LED indicates power; solid amber means fast charging; flashing amber indicates trickle charging.
Identifies the battery pack and the screws used to secure it to the instrument housing.
Distinguishes between NiMH battery packs (black) and Alkaline battery packs (gray).
Use hex wrench to loosen screws and gently remove the battery pack using fingers only.
Ensure vibrator is at the top, do not force pack, and tighten screws securely but do not overtighten.
Explains how 'lazy' batteries form crystals, increasing resistance and causing voltage drop.
Instruments failing to meet expected run time should be exercised using the 'anti-lazy battery' deep discharge cycle.
Ensure instrument firmware is v3.41+, cradle serial ends in 'D', and power adapter has a stereo jack.
Overview of main menu selections including Location, User, Datalogger, Service, AutoCal, and Options.
Select 'Anti-Lazy-Battery' from Option Menu, press Change, then Exit. Allow battery to drain fully.
Program instrument to automatically activate deep discharge when battery is below 10% charge.
Choose specific days for automatic deep discharge to manage the 20-hour completion time.
Pressing 'Off' while instrument is in charger ends the deep-discharge cycle and resumes normal charging.
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. |
To Next Page
