Operation - Extech Instruments RD300 User Manual

Refrigerant leakage detector

Table of Contents

Operation

1. Power Button: Press and hold the power button for 2 seconds to turn power ON. All LEDs

will light and the start‐up tone will sound. Press and hold power button for 2 seconds to turn

off the meter. Check the battery if the meter does not switch ON.

2. Warm‐Up: The detector will automatically start heating the sensor after power‐on. During

the 90 second warm‐up, the Leak Level LEDs and Power LED will be lit in cyclic fashion and

the meter. After the warm‐up, the audible tone will sound and the Power LED will remain lit.

At this time the detector is ready to find leaks.

3. Sensitivity Range Button: Press the Sensitivity Range button to change sensitivity levels. The

High, medium, or low LED will light depending upon the user's selection. The detector will

automatically default to the previous sensitivity level after warm‐up.

4. Reset Button: Press the 'R' button once to reset the meter; the reset LED will flash once.

5. Mute button: Press the Mute button to toggle the audio on and off. The mute LED is on

when the audio is switched OFF (muted).

6. Tip Work Light LED Button: Press tip light LED button to switch the probe tip work light ON

or OFF.

7. Pass the sensor tip near the potential source of leak and gage the meter's response by

observing the color coded LEDs. Green LEDs represent the absence of a leak or a very small

leak, yellow LEDs represent a moderate leak, and red LEDs represent the detection of a large

leak.

Probe and LED Work Light Replacement

To replace the 3V LED work light or the sensor please refer to the diagram below. Please switch

off the detector before removing sensor.

Diode sensor tip ‐ part number RD300‐S. LED work light ‐ part number RD300‐L.

Notes:

The life of the sensor is 1 year under normal use; if a sensor is exposed to a 100 ppm

refrigerant, the sensitivity characteristics of the sensor may be affected.

Make sure there are no water droplets or dust on the surface of the sensor.

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RD300-EU-EN V1.1 12/13

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