Ensure your DRX3 is powered off. Remove the old sensor by holding the module firmly and pulling the sensor tip straight out. DO NOT TWIST. Align the new sensor tip (RXA3) and push into place at the end of the module. DO NOT TWIST OR BEND PINS. For a new sensor, with the unit powered off, enter factory mode by holding ,ZERO and SENSITIVITY buttons together > 5 seconds. Press ZERO until ""2. Reset Sensor Life"" appears. Press and hold ZERO and SENSITIVITY to reset sensor hours. Press and hold to power off. NOTE: Do not reset sensor hours if you are re-installing the same sensor.

The DRX3 is our ATEX Rated leak detector that is compatible with all A1, A2L and A3 refrigerants, as well as N2/H2 Tracer Gas. The DRX3 is compatible with our Job Link® wireless platform. The DR58/DR82 are our common refrigerant leak detectors and are compatible with all A1 and A2L refrigerants.

Set the sensitivity level by pressing the Sensitivity button. Low (L), medium (M), or high (H) sensitivity will be indicated at the top of the LCD display. The higher the concentration of refrigerant in the ambient air, the lower the sensitivity setting should be to minimize false trips. The TURBO (T) function is an additional 4th sensitivity that pushes the DR82 to it highest possible sensitivity.

Automatic zeroing on the instrument allows for convenient pinpointing of a refrigerant leak by setting a new 'zero-value' every 3-4 seconds. This is useful when a large concentration of refrigerant is being detected in a contained area. Manual zeroing puts the control of the zero function in your hands, you can simply press the zero button on the tool at any time to set a new zero value. This is good for clarifying the leak source once it has been identified.

If no sensor is installed or the installed sensor is faulty when the unit is turned on, an alarm will sound and the unit will turn off.