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JB INDUSTRIES
• QUEST LD-3000 Operating Manual • 630.851.9444 • [email protected]
MAINTENANCE
Batteries
Install Batteries:
Remove screw located at base end of unit and pull down hinged battery door . Insert four
AA batteries into the battery compartment as shown, noting Polarity Marks for battery orientation .
(Figure C)
Figure C
Handle Base
Polarity Marks Battery Door Screw
Sensor
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 Cover by pulling out of Socket . Install the new sensor by aligning the Keyway
Notch in Sensor Cover with the Raised Keyway on Sensor Socket .
(Figure D)
Note:
Do not force Sensor Cover into Socket—misalignment will damage sensor pins .
Figure D
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 warm up cycle 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 .
Raised Keyway
Filter
Keyway Notch
Sensor Socket
Sensor Cover
To install sensor cover: align notch with raised keyway and insert straight on (do not twist)
To remove sensor cover: pull straight out (do not twist)
Sensor Tip