HD Electric PRX Series Guide

Figure 3
Figure 1
Figure 2
PRX Series Proximity Voltage Detectors
Battery Replacement Instructions
HDE’s PRX Series Proximity Voltage Detector Battery Replacement Kit consists of one overlay, one
battery with tape attached and three switch plungers. To change the battery, follow these
instructions:
1. Carefully remove the overlay of the PRX (Figure 1) and
discard. Remove the switch plungers and set aside in a
safe place, you will need them once the battery
replacement is complete. Spare plungers have been
included in the battery replacement kit if needed.
2. Once the overlay is removed, remove the two screws on
the front of the instrument. Then carefully use a
screwdriver to slide the chassis out of the housing
(Figure 2).
3. Clean the front surface of the housing to remove any
adhesive that may still be on the instrument. Adhesive
remover or rubbing alcohol is recommended. If using
adhesive remover, make sure the housing is cleaned with
alcohol so no oily residue remains.
4. Once the chassis is removed, carefully lift up
the shielding, unplug the battery and remove
it (Figure 3). Be careful while doing this so
no damage is done to the board.
HDElectricCompany.com

PRX Battery Replacement Instructions, V3a
12/09/19
Figure 5
Figure 6
Figure 4
Figure 7
5. Replace the battery with the new one supplied in the kit.
The battery has a polarized locking connector and can
only be plugged in one way (Figure 4). Make sure the
connector snaps into place on the board.
6. After the battery has been replaced, remove the backing
from the tape on the battery, close the chassis and slide
it back into the housing. Be careful when closing the
chassis so the two standoffs remain in the upright
position.
7. Insert the screws so they are flush with the housing –do
not overtighten. Place the switch plungers into the
housing in the locations they were removed from (Figure
5).
8. Test the PRX by pressing the ON/OFF button and
verifying that the PRX turns on all voltage range lights one
at a time from the lowest range to the highest, returns to
the lowest range and then turns on the voltage indicating
lights and beeper. If the PRX stays on following this test it
has passed the self-test. If the PRX test is not successful,
check to make sure the battery is installed correctly (see
Step 5). If the PRX test is still unsuccessful, charge the
battery and perform the test again. If the self-test
continues to be unsuccessful, contact HDE.
9. Remove the paper liner from the back of the new overlay
(including the switch plunger locations) and place the overlay
onto the housing of the PRX (Figure 6). Once it is aligned,
press it into place to secure the overlay onto the housing.
10.Before using the PRX the new battery should be charged
(Figure 7). Charge the PRX using the charger cord. Charge
is indicated on the face of the unit by the voltage range lights
turning on in sequence. A full charge can take up to three
hours. When the charge is complete only the highest voltage
range light will remain on. After three hours, this light will turn
off. The PRX battery cannot be overcharged.
If there are any questions regarding the PRX battery replacement procedure, please contact HD
Electric.