Low Battery Indicator
Replace the 4 AA Alkaline batteries when the red LED on the
control panel is lit. Follow battery installation instructions under
Maintenance
section.
Audio Mute Function
To silence or mute the audio beep and alarm signal, press the
MUTE button. To restore the audio sound, press the MUTE
button again. (Note: a few seconds is required to restore sound
if the mute button is pressed in rapid succession.)
Cross Sensitivity to Automotive Chemicals
Some automotive solvents and chemicals have similar hydrocarbon
properties as H2 and may elicit a positive response (<20 seconds)
from the D740. Before leak checking, clean up any chemicals in the list
below that elicit a positive response.
Product Specifications
Model #
D740
Name
Leak Detector, H2 Tracer Gas
Sensitivity
4 g/yr R-134a equivalent
Sensor Life
>300 hours
Response Time
Instantaneous
Power Supply
4 AA Alkaline batteries
Battery Life
4-6 hours continuous
Warm up time
< 20 seconds
Probe length
17 inches
Numerical Display
7 segment digital display (1 to 9)
Weight, lbs
1.5 lbs
Warranty
2 years
Chemical Name/Brand
Response
Methanol based windshield wash fluid
N
Ford Spot Remover (Wet)
Y
Ford Rust Inhibitor
Y
Ford Gasket Adhesive (Wet)
Y
Loctite Natural Blue degreaser (diluted)
Y
Ford Brake Parts Cleaner
Y
Ford Silicone Rubber (uncured)
Y
Motorcraft Antifreeze heated to 160 deg F
N
Gunk liquid wrench
Y
Ford silicone lubricant
N
Ford Pumice lotion (with solvent)
Y
Ford Motorcraft brake fluid
Y
Ford Carburetor Cleaner
Y
Transmission fluid heated to 160 deg F
N
Mineral engine oil heated to 160 deg F
N
6
