SCS 711 User Manual

USER GUIDE TB-9021
711 Charge Analyzer
Operation and Maintenance
Figure 1. SCS 711 Charge Analyzer.
Description
The SCS 711 Charge Analyzer is an electronic test
instrument designed for ease of use. The lightweight
and compact construction offers great versatility in the
workplace. It can be used as a laboratory analytical
tool, evaluating the performance of ionizing equipment,
static-protective packaging, work surfaces and personnel
grounding systems. It is also very effective for use as a
demonstration tool in employee static awareness training
programs.
All parameter settings are controlled via a built-in
EEPROM. These parameters are defaulted to when
the 711 Charge Analyzer is switched on again. In case
of a malfunction, the unit will display a corresponding
message and then automatically switch off.
The 711 Charge Analyzer operation works according to
the field mill-principle. The field meter is a parametric
amplifier. An electrostatic field induces a charge
on the sensor electrode, generating an AC current
that is proportional to the field strength. An amplifier
measures this current without reducing the energy of the
electrostatic field in average time.
Important Notice: Avoid extreme discharge of the
rechargeable batteries. If the batteries require charging,
do not allow the unit to sit idle for a period of time without
first fully charging the batteries.
The 711 Charge Analyzer is powered by built-in
rechargeable NiMH-batteries or an AC wall plug-in
adaptor. When the unit is powered from the rechargeable
batteries, the LCD-display will not be back illuminated
to extend battery life. This power saving feature will
initiate within 60 seconds after the last measurement
or button depression. Also during battery operation,
the continuous LED-bar indication changes to a single
(momentary) action.
TB-9021 Page 1 of 12 April 2017
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
In case of a low battery power condition, the 711 Charge
Analyzer automatically switches off, first displaying LOW
BATTERY then SWITCHING OFF UNIT. If this occurs,
continued operation of the 711 Charge Analyzer can be
maintained through the AC adaptor. Recharge time is
approximately 14 hours with unit off, when batteries are
fully discharged.
Two vertical LED bars indicating 0 - 100% charge level
and polarity are located on the left and right sides
of the front panel. The alphanumeric LCD-display is
the information center of the 711 Charge Analyzer
and allows the user to observe the principles of static
protection. The unit's high accuracy makes it well suited
for product performance analysis.
All interfacing connections are made at the rear of the
unit. The SCS 711 Charge Analyzer can be connected
to a y (t)-recorder via the ± 2 volts analog output.
A Remote Field Sensor Probe is connected through a
4-Pin circular socket located on the rear of the unit. The
sensor operates on the same measurement principle as
described above. This feature allows to the user to make
measurements by means of a hand-held or fixed position
probe in remote locations, where it may be impossible
to position the 711 Charge Analyzer. Measurement
distances with the probe are 1, 2, 5, 10 and 20
centimeters. The built-in microprocessor automatically
converts the measured field strength via the chosen
distance into a charge of an equivalent potential in volts.
The display automatically switches from volts to kilovolts.
The following operating functions will be automatically
activated, when the appropriate electrode or sensor is
connected to the base unit.
The 711 Charge Analyzer comprises of four types of
independent operating functions:
• Static field meter sensor – Measuring electrostatic
fields
• Voltmeter - Measuring the potential on charged objects
• Static decay time – Measuring charge-decay and
balance of ionizing equipment by charge plate monitor
(CPM) method
• Remote Field Sensor Probe – Measuring the
potential on charged objects in confined areas.
Change between these operating functions will
be verified on the display as CHANGE MODE OF
OPERATION.
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