INST‑05070410
7.5 Measurement
With the ion balance plate on FMX-003, approach a ionizer slowly from a distance. The
numerical value and the bar graph, displayed on the LCD, indicate the ion balance voltage
(offset voltage) due to the ionizer at that distance.
CAUTION
If the reading blinks at [±220] with a continuous warning sound during the ion balance・
measurement, maximum voltage reading limit has been exceeded. If this condition
persists, the unit might be damaged. Please suspend the measurement in this case.
The polarity of measured offset voltage is indicated by sign of [+] or [-] displayed to the・
left of the numerical value. In addition, the color of the bar graph indicates the polarity of
the offset voltage, red being positive and blue negative.
Each bar of the bar graph corresponds to 15 V approximately.・
FMX-003 goes into ion balance measurement mode when IB button is pressed, even if the・
ion balance plate is not attached or not attached properly. However, the measured value
will not be correct.
FMX-003 is calibrated by applying DC voltage to the ion balance plate directly. If the・
plate is attached properly to FMX-003, the display gives a direct reading of the ion
balance voltage.
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INST‑05070410
7.6 Hold mode
When the center of green circle button switch marked "HOLD" is pressed once during the
measurement, the digital numerical value and the bar graph will be held on the display. This
is called "Hold function". This function allows the operator to move FMX-003 after
measurement where it can be more easily read. "HOLD" is shown on the left side of the
display. Once FMX-003 is in hold mode, no more measurement is possible. One more
pressing of the button will cancel the hold function to resume measurement again.
CAUTION
The numerical value and the bar graph displayed on the LCD will change if FMX-003・
moves during measurement. Hold function enables measurements in inaccessible areas.
Please note that the display of measured voltage as the numerical value and the bar graph・
are not saved in FMX-003, even if it is turned off in hold mode. Data and mode
informations will be lost by switching off the unit.
CAUTION
Check periodically the insulation resistance of the ion balance plate assembly. For easy・
checking, confirm if the displayed value is decreasing after the plate is charged up to
about 100 V. If the insulation resistance is low, the reading will decay quickly.
The insulation resistance between the ion balance plate and the stainless steel arms sh ould・
be greater than 10 TΩ (10 Ω).
13
The instrument should be recalibrated once a year. Please contact us or our agents when a・
recalibration of FMX-003 is necessary.
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