Desco 19430 Installation Manual

TECHNICAL BULLETIN TB-3048

Digital Static Locator
Installation, Operation, and Maintenance

The POWER button turns the Digital Static Locator on
and off. If the 19430 is left on for 5 minutes, it will
automatically turn itself off. To resume operations, press
the red POWER button once. To disable the AutoOff
feature and allow continuous operation, press the red
Power button and hold down for at least 3 seconds
when turning the Digital Static Locator on.

The HOLD button holds the display of a measured
charge. HOLD mode turns off the ring range lights. No
measurements are possible when in the HOLD mode.
The hold measurement feature enables the user to use

Figure 1. Digital Static Locator Item #19430

Description

Desco’s Digital Static Locator is a compact

electrostatic eldmeter used for locating and measuring

static charges.

The Digital Static Locator measures static voltages
within ±20kV (20,000V) at a distance of 1". Results
are simultaneously displayed numerically and in bar
graph format. POWER on/off, ZERO adjustment, Ion
Balance (IB) and HOLD are all push button operation.
The HOLD button allows the display to retain the static
charge reading. This is especially useful where display
is difcult to see during measurement.

the eldmeter in inaccessible areas. When the HOLD
button is pressed once during a measurement, the
digital numerical value and the bar graph will be held on
the display. This function allows the operator to move
the eldmeter where it can be more easily read. The
HOLD mode is displayed above the battery capacity
display. To cancel HOLD mode and resume
measurement, press HOLD once more.

The IB button and prepares the eldmeter for Ion
Balance (offset voltage) measurement.

The ZERO button sets the display to a zero static
charge. When the digital meter is turned on, the zero
adjustment is inoperative if it is in HOLD mode.

Made in America

Two LED guide ring range lights help position the
eldmeter at the right distance from a charged surface.
The conductive case and ground snap facilitate
grounding for accurate measurement. The circuitry of
the 19430 has been designed to make measurements
in areas using air ionization.

Packaging

1 Digital Static Locator

1 Plate Assembly
1 Ground Cord

1 Battery

Features

The 19430 has four push buttons. The buttons operate
by pressing once lightly. There is no need to press the
button repeatedly. Its effective life may be decreased by
repeated misuse.

NOTE: For reliable measurement, the eldmeter must
be grounded properly using the ground lead provided.
The plastic case of the 19430 Electrostatic Fieldmeter
is made of conductive resin. The grounding terminal
provides the reference potential for the electrical circuit.
This terminal must be grounded properly for accurate
measurement.

Operation For Static Charge Measurement

1. Turn the ring range lights and sensor toward a
surface to be evaluated.

2. Press the POWER button. A single beep for one
second indicates proper operation. The battery
capacity indicator and bar graph will be displayed.

3. The meter reading should be zero (0). Use the ZERO
button if it is not.

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

TB-3048 March 2011 Page 1 of 5

© 2010 DESCO INDUSTRIES INC.

Employee Owned

4. Hold the eldmeter 1” away from the charged
surface. Two beams of light will form concentric
circles when the meter is the correct distance, 1”
away, from the surface. The measurement
accuracy is dependent on a stable ground reference
and the 1 inch measuring distance. It is also
dependent on the “aspect ratio”, relating the size of
the object to be measured to the measurement
distance. This aspect ratio should be at least 3 for
best accuracy, i.e. the object should be at least a
3 inch square when measuring at a 1 inch distance.
Accurate measurements may be made at other
measurement distances by scaling the meter range
and observing the proper aspect ratio. For example,
at a measurement distance of 3 inches, multiply the
meter reading by 3 to give a range of 0 to 60 kilovolts.
For accuracy, the object being measured at this
distance should be at least a 9 inch square.

Operation For Ion Balance (Offset Voltage)
Measurement

NOTE: The Digital Static Locator Ion Balance

measurement feature should not be used to measure
the ion balance of static bars. It may be used to mea­sure other ionizers for ion balance (offset voltage).

1. Depress the plate assembly release button on either
side of the eldmeter to remove the charge plate
assembly.

2. Insert the plate assembly into the other end of the
eldmeter (the end with the Desco logo) until it

clicks into place.

NOTE: Ion Balance plate assembly must not move
during measurement.

5. A bar graph and a digital display on the 19430
displays the voltage of the charge. Press HOLD if you
want to hold the display of the measured charge.

6. To turn off meter: Press POWER if you have not
used the HOLD mode.

If you have pressed HOLD and

wish to retain the

meter reading for the next use,
press the POWER button to
turn off the 19430.

If you have pressed HOLD and

do not wish to retain the meter

reading for next use, press

Figure 3.

HOLD then POWER.

If the 19430 is left on for ve minutes, the unit will beep

ve times then turn itself off automatically. To disable
this feature, simply press and hold the red power button
for at least three seconds when turning the 19430 on.
Three beeps and the A-OFF display indicates that the
feature has been disabled.

3. The conductive case must be grounded using the
supplied ground cord. It is imperative for accurate
ion balance and to drain any charge that has
developed prior to measurement.

4. To turn on the ion balance measuring circuit, press
the blue IB button.

5. Turn sensor toward an uncharged area.

6. The meter reading should be zero (0). Press the
Zero button if it is not.

7. Hold the eldmeter centered in front of the ionizer at
any convenient, repeatable distance, such as 1 foot.

8. A bar graph and a digital display on the 19430
displays the ion balance information. Press HOLD if
you want to hold the display of the measured

charge.

9. To turn off the meter:

Press POWER if you have not used the HOLD

mode.

Results

A display of [+] or [-] next to the digital numeric value
represents the polarity of the static charge being
measured. In addition, the color of the bars in the bar

graph indicates the polarity of the static charge. Red

and blue bars indicate positive and negative charges
respectively.

During a static charge measurement, if the digital
display starts ashing along with a continuous beep,
stop taking the measurement. The static charge is
greater than the meter can measure. Attempts to
measure too high a charge may damage the sensor.

DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • [phone] • Fax [phone]

DESCO EAST - One Colgate Way, Canton, MA 02021-1407 • [phone] • Fax [phone] • Web Site: Desco.com

TB-3048 Page 2 of 5

If you have pressed HOLD and wish to retain the
meter reading for the next use, press the POWER
button to turn off the 19430.

If you have pressed HOLD and do not wish to
retain the meter reading for next use, press HOLD

then POWER.

10. Depress the charge plate assembly release buttons

on either side of the eldmeter to remove the charge
plate assembly. Store the plate on the opposite end,
pressing it until it clicks into place.

© 2010 DESCO INDUSTRIES INC.

Employee Owned