When live mains are knocked down by storm condition or accidents, the Pole tester with its directional characteristics can be very useful in preventing injury to electrical line personnel or rescue staff. As the tester is directional it will alarm when approaching live mains that are hanging or lying on the ground. The unit can be tuned to ignore the electric field from above and only detect in the direction the user is pointing at chest height or lower. This prevents the user walking on or into fallen cables.
In the situation below one of the three phases is down leaving two phases in the air and one on the ground. This situation may occur at night in low light conditions, in snow falls and drifts, concealing the live elements. Follow the procedure below.
- For storm damage and hazard approach switch the unit to the “ON” position, a green LED power light will immediately illuminate, indicating good battery condition and circuitry connectivity.
- For safety location testing place the Sensitivity switch to HIGH (to the RIGHT) and the Sensitivity Rotary Dial to the far RIGHT to position 12.
- Confirm the low battery LED is still green and continue to step 4. If the (orange) LED illuminates, replace battery before use or recharge NIMH battery with approved charger and repeat steps 1 – 3.
- Press the Self Test button to check the unit is operating correctly. A repeating tone will be heard indicating a correct operation. A two second delay will occur between the self test operation and the normal unit detection operation. The tester is ready for operation.
- It is recommended that regular checks using the self test function be made before and during the safe approach of electrical voltage testing.
- Always hold the tester with your thumb placed on the indicated position with your arm outstretched. This allows maximum effectiveness and detection.
- After correct test instrument procedure has been carried out, raise the tester above the head and adjust the sensitivity dial until the voltage in the line above is detected.
Method: Placing your right hand on the tester as indicated use the other hand to move the Sensitivity Rotary Dial slowly to the left until the alarm is a strong and continuous sound.
- If tester does not alarm, If over head mains cannot be detected by the tester at arm’s length at HIGH 12. It is our recommendation that with the self test function showing correct battery voltage and circuit operation, the self test function can then be used as a dependable correct safety procedure to approach the pole.
- When the over head line conductor is located (by the activation of the alarm), lower the tester to chest height. If the tester is still alarming then turn the rotary switch back until the field is broken.
Method: By leaving the hand placed on the tester with the thumb as indicated, remove the other hand and lower the unit to chest height.
- Verify the calibration of the over head mains again to check voltage is still present and lower to chest height where the alert tone should dissipate
- With the tester at arm’s length approach the hazard to be tested.
Method: Whilst approaching the hazard keep arm out stretched and your other arm beside your body; walk calmly and slowly towards the test area, Moving the unit from knee height to chest height. If the Tester alarms while approaching the area under test, stop and raise the tester towards the overhead conductors to make sure the tester is not picking up overhead field, if field is still broken above (no alert tone) proceed to step 13.
- If the tester does not alarm there is no significant voltage in that area.
- If an alert signal is heard do not panic but check your results proceed to step 14.
Method: To check your results take a step back until signal has discontinued then take a step forward to verify activation of unit. Please note the further you are away from the area under test and the tester is alarming, the higher the leakage in that pole. A set of calibration tables are available for switch positions and voltages if required.
- Follow standard isolation procedures with a ten metre perimeter, assess the area around the pole and conductor and ensure no conductive material has contacted pole. i.e. Fences machinery and water, as where you are standing may be active.