Safety Gloves; Theory Of Operation - Fluke C9970 User Manual

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To replace the battery, do the following:

Open the Voltage Detector body by unscrewing the handle in a counter-

clockwise direction and sliding it back from the front assembly. Do not

attempt to loosen the check contact or the ground terminal.

Gently slide the battery out of the metal shield, attach a new battery, and

slide it back into the metal shield. Be careful not to get the battery wires

between the metal shield and the side of the battery or to bend or distort

the metal shield.

Slide the handle over the shield and rotate in a clockwise direction until a

snug fit is secured. Make sure that the LEDs line up with the trigger, or

the probe switch may not operate. A snug fit is required for proper O-

ring seal and LED alignment, but it is not necessary to overtighten.

Safety Gloves

The Voltage Detector is designed to detect voltages equal to or greater than

110V, 60 Hz, AC. Using gloves reduces the sensitivity of the Voltage Detector

and may cause erroneous results (see "Theory of Operation" below). If

protective gloves are worn while using the Voltage Detector (or are required

by company procedures) and a hazardous voltage is indicated, do not retest

without gloves. Move away and refer to your company's safety procedures.

However, if the user is gloved and a safe condition is indicated, perform a

second test without gloves and follow the results of this second test.

The Voltage Detector uses electronics and high-voltage mechanical design to

indicate the presence of dangerously-high AC and DC voltages. To do so, it

first determines the voltage difference between the user's body and the

object being tested. Then, it compares that difference to an internal safety

reference. If the voltage difference exceeds this reference, the Voltage

Detector indicates danger. No interpretation of readings is required.

The capacitance between the handle of the Voltage Detector and the user's

hand is part of the measuring circuit and can affect the sensitivity of the

Voltage Detector. Further, voltages induced onto the user's body can also

affect readings. Such voltages can be induced when the user is isolated from

ground while working aloft near power transmission lines. These induced

voltages can cause the Voltage Detector to indicate danger when none

actually exists. These induced voltages are harmless, but must be discharged.

The correct procedure is described under "Aerial Testing" on page 14.

Safety Gloves

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