Overview:
The Ultra Stable Surface Voltmeter 2, utilizes a sensor shutter/switcher technology which provides long term
stability without drift or the need to frequently re-zero the meter. This technology also eliminated false or offset
readings due to charged air molecules/ air ions. The sensor has a 29 inch detachable cable which can be
extended by an additional six feet.
The meter measures the magnitude and polarity of static charge on objects or surfaces. The sensor is calibrated
for measuring a surface at 1" from the sensor. On a metallic or conductive surface, the meter measures the
voltage on the surface. (As with any electrostatic voltmeter, the displayed reading depends somewhat on the size
of the object being measured and the distance between the object and the sensor.) On insulating surfaces,
"voltage" is not a well-defined number. In this case, the meter reads a number proportional to the static charge
present. The SVM2 has high sensitivity (resolution), and can detect even a 1/10 volt change anywhere within its
full range of +19,999.9 to -19,999.9 volts.
An analog output jack provides a DC output voltage of +/- 0 to 2 volts which proportionally corresponds to the
display and measurement of 0 to 20K volts.
An optional USB port allows reading to be recorded and uploaded to a PC. Real-time data streaming is also
supported via the USB Port. Note the "Record" has no function without the USB option installed.
Measuring Surface Voltages:
To use, first ground the meter with the 10 foot ground cable (supplied). This defines the "zero" voltage. With the
black cap installed on the probe, press the "Zero" pad. Remove the cap and hold the end of the probe at a distance of one inch from the surface
being measured. At 1", the display shows voltage (+/-2%) of a conductive surface. At 2" it is approximately 60% as sensitive (that is, a reading of
1500 means the voltage is actually 2500 volts). These are correct numbers if the conductor is wide; that is, if it covers most of the "horizon" as
seen by the probe. The above numbers are also correct if the surface is an insulator that is coated onto a (large) metal surface (that is, the
insulator has a "ground plane". However, if the surface is a bare insulator (without a ground plane or metal backing) that is charged, then the
insulator will emit an electric field (but will not have a well-defined voltage). The electric field will be approximately the same at all distances from
the charged sheet, and will not be 60% at 2", etc. The electric field in volts per meter is approximately 30 times the reading on the display. For
example if the display reads 1000.0, the electric field is 30 KV/m. This is correct if the sheet covers a majority of the "horizon" and if the sheet has
a uniform amount of charge per area. If less than the full "horizon" is covered, the display will read a lower number. (This also works when
measuring the atmospheric electric field; point the sensor upward. Remember that nearby conductive objects that are above the horizon will
reduce the unobstructed electric field).
Ultra Stable Surface DC Voltmeter Model USSVM2 Instructions
Optional USB Port
Probe Connector
Analog Output
Power Adapter Jack
Meter Ground Wire
Optional accessories include a detachable rubber boot with a folding stand, a six foot probe extension cable and a protective case.
SPECIFICATIONS
Range at 1”:
0 to +/- 19,999.9 V
Resolution at 1":
0.1 Volt
Accuracy:
+/- 2% of the reading
Outputs:
1. Analog Output
2. USB (Optional)
Environmental:
-1 C to 43 C (30°F to 110°F), 0-90% RH non-condensing
Meter Size:
4.5 X 3 X 1.2 inches; 115 X 72 X 30 mm
Probe Size:
1.2 diameter x 2.5 inches; 31 x 63.5 mm
Probe Cable Length:
29 inches; 74 cm (detachable 6 pin mini din connector)
Weight:
5.5 oz
Power:
1. Battery 9 Volt Alkaline ~6 hour life (included)
2. External 9VDC Power adapter (included)
3. USB port (optional). When connected to a PC/Laptop power comes from the PC
