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Rex DD-4 Operating Instructions

Quick Instructions:

 Power:

The durometer uses two internal batteries or an external AC adapter. To install batteries, use a narrow screwdriver to gently pry under the tab on the left side of the bezel and slide out the battery tray. Insert two batteries + side up, and slide the battery tray back into the bezel. NOTE: To prevent damage from battery leakage or corrosion, it is strongly recommended that the batteries be removed from the durometer if it will not be used or will be powered by the AC adapter.

The 9v AC adapter, which provides 9v DC +/- 10% at 30 ma or below, can be used to power the durometer for continuous operation. Connecting the AC adapter disconnects the internal batteries. NOTE: Do not attach the AC adapter when the durometer is already on, as this could result in erroneous readings or an error condition.

Durometer Operation:

To operate the durometer, press the foot of the gauge firmly against the specimen, but not so firmly as to imbed the foot into the surface. This will yield the durometer reading. If during use the display freezes on a number, simply remove the dust cap on top of the indicator and depress the screw with a pen or pencil, the press ON/Clr. This resets the durometer - no further calibration is necessary.

Rex Gauge Guarantee:

All Rex durometers and accessories are guaranteed for a period of one year against defective workmanship and/or material. This guarantee does not apply to products that are mishandled, misused, etched, stamped, or otherwise marked or damaged. The instrument will be repaired or replaced (at the manufacturer's option) without charge by Rex Gauge Company.

Repair and Calibration:

All Rex gauges requiring calibration and/or certification should be sent directly to Rex Gauge Co., Inc., 1250 Busch Parkway, Buffalo Grove, IL 60089, phone 847-465-9009.