BATTERY MAINTENANCE
Install Batteries:
Remove screw located at rear end of unit and pull down
hinged battery door to open as shown. Always insert all four batteries into the
battery compartment in the same direction. Note: polarity mark on the inside of the
battery door for proper battery orientation.
PRODUCT SPECIFICATIONS
Model #
LD900
Name
Leak Detector, Refrigerant Gas
Sensitivity
.05 oz/yr R134a, .015 oz/yr R1234yf, .025 oz/yr R22
Sensor Life
> 10 years
Response Time
Instantaneous
Power Supply
4 AA Alkaline batteries
Battery Life
4-6 hours continuous
Warm up time
< 20 seconds
Probe length
17 inches (43.8cm)
Numerical Display
7 segment digital display (1 to 9)
Weight, lbs.
1.5 lbs. (0.68kg)
Warranty
2 years (includes sensor)
EN14624-2012 TEST SPECIFICATIONS
Minimum/Maximum Sensitivity Threshold (fixed)
1 gm/yr minimum, >50 gm/yr maximum
Minimum/Maximum Sensitivity Threshold (moving)
3 gm/yr minimum, > 50 gm/yr maximum
Minimum Detection Time (1gm/yr)
Approx. 1 sec
Clearing Time
Approx. 9 seconds after exposure to >50 gm/yr
Minimum Threshold after Maximum Exposure
1 gm/yr
Sensitivity Threshold in Polluted Atmosphere
1 gm/yr
Calibration Frequency
1/yr check with calibrated leak Standard
CROSS SENSITIVITY TO AUTOMOTIVE CHEMICALS
Some automotive solvents and chemicals have similar hydrocarbon properties as R134a and may elicit a positive
response. Before leak checking, clean up any chemicals in the list below that elicit a positive response
Chemical Name/Brand
Response
Rain-X Windshield Wash Fluid
Y
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° F
Y (partial)
Gunk liquid wrench
Y
Ford silicone lubricant
N
Ford Pumice lotion (with solvent)
Y
Ford Motorcraft brake fluid
Y
Ford Carburetor Cleaner
Y
Dextron Transmission fluid heated to 160° F
N
Quaker State Motor Oil heated to 160° F
N
SENSOR MAINTENANCE
Replace Filter:
Unscrew sensor tip as shown to replace filter. Replace filter
whenever it becomes visibly dirty or every 2 to 3 months depending on use.
Replace Sensor:
Remove sensor by pulling out of socket. Install the new sensor
by aligning the Keyway notch in sensor cover with the raised keyway on sensor
socket holder (see figure below).
Note:
Do not force sensor into socket. Misalignment can damage the sensor pins.
IMPORTANT:
The instrument’s software is designed to alert the user if the sensor is dislodged or
defective. If the sensor is not fully inserted into the six-pin socket, or if it is defective, the instrument will not come
out of the “Warm Up” mode for proper operation when the power button is turned on. Additionally, if the instrument
becomes unstable during its operation, it is an indication that the sensor may be defective or dislodged.
Unscrew tip to
replace filter
Filter
Push straight on (do not
twist) to install sensor
Pull straight out (do not
twist) to remove sensor
Keyway alignment
Polarity mark
6
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LeakDetectors-LD900-UserManual.indd 6-7
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