Product Manual

Changing the batteries

The TDR 150 requires 4 AA batteries. The battery

holder is on the underside of the display unit. Re-

move the screws and take off the base plate. Install

batteries and ensure correct polarity by referencing

the (+) positive and (-) negative labels at either end

of each slot. Replace the base plate. Be sure the

sensor is still plugged into the socket (see fig. 1).

Do not permanently remove the foam plug (fig.

2). It ensures the plug does not come detached.

Batteries

cable

Fig. 1: Sensor Cable attached.

Fig. 2: Foam plug installed