TB-3040
Page 3 of 6
© 2009 DESCO INDUSTRIES, INC.
Employee Owned
Figure 4. Reading the Digital Static Field Meter while in
the ±2 kV range
Hundreds
Tens
Ones
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.
Figure 3. Reading the Digital Static Field Meter while in
the ±20 kV range
Thousands
Hundreds
Tens
Note:
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.
HOLDING THE LAST READING
With the meter positioned 1 inch from the object being
measured, press the HOLD button. This will freeze the
reading from the object on the display and the analog
output signal. This feature allows the operator to move
the meter where it may be more easily read or saved for
later reference.
Note:
The red ranging lights will be off while the meter is
in HOLD mode. It is advised to do this between
measurements to prolong battery life.
ANALOG OUTPUT
The analog output jack labeled “OUT” on the face of
the meter accepts a standard 2.5 mm monaural phone
plug and is provided so the output of the Digital Static
Field Meter may be connected to an oscilloscope, strip
chart recorder, external meter or other device. Use the
included cord to achieve a connection between the field
meter and alternate measuring instrument. The voltage
at this output is 1/1000th (±2 kV range) or 1/10,000 (±20
kV range) of the measured voltage.
BATTERY REPLACEMENT
The Digital Static Field Meter operates from a standard
9 VDC alkaline battery. Battery life is in excess of 50
hours under normal use. When the battery voltage
drops below 6.5 V, “BAT” will appear on the display.
To change the battery, slide the battery cover down at
the back of the Meter and remove the battery from the
battery clip. Replace the battery with a fresh one and re
-
install the battery cover. The battery should be removed
from the Meter if its is to be stored for an extended
period of time.
Maintenance
The Digital Static Field Meter is factory calibrated and no
maintenance is required. If for any reason you believe
the Meter is not working correctly, please contact Desco
Customer Service. CAUTION - There are no user
serviceable parts. Any unauthorized service will void the
warranty and result in additional repair charges.
Note:
This Meter is a precision instrument and should
not be subjected to dropping as that would void the
warranty.
