Under normal conditions, the ionizer will attract dirt and dust (especially on the emitter electrodes). To maintain optimum performance, cleaning must be performed on a regular basis. The electrodes should be cleaned at least every six months. However, more frequent cleaning may be required if used in
environments with more contaminants.

Test your Ionizer with a Desco 19497 Ionization Test Kit to required limits per ANSI/ESD S20.20-2007 per test procedure in ESD TR53

Tests
Ionizer is to reduce 1,000 volt charge placed on isolated conductive plate to 100 volts in less than ____ seconds (user defined) Discharge Time. Then repeat test -1,000 volts to -100 volts.
Offset voltage or Balance to be less than ± 50 volts.

Measure Discharge Time
· Test ionizer as it is being used; do not clean.
· Remove from the surface only those items that might block airflow.
· Ionization Test Kit includes a Conductive Plate that is to be bottomed on the Static Field Meter.
· Locate Ionization Test Kit on the worksurface furthest away from the ionizer where products are handled.
· Technician and Ionization Test Kit are to be grounded.
· Using Charging Unit, hold acorn nut and simultaneously press the button; place charge in excess of 1,000 volt on
   Conductive Plate.
· With Ionizer operating at normal speed, use a stop watch or count time in seconds it takes to go from 1,000 volt
   reading to 100 volts.
· Record Discharge Time in seconds
· Change polarity by holding opposite acorn nut of Charging Unit, and simultaneously press button; place charge in
   excess of -1,000 volt on Conductive Plate.
· With Ionizer operating at normal speed, use a stop watch or count time in seconds it takes to go from -1,000 volt
   reading to -100 volts.
· Record Discharge Time in seconds

Measure Offset Voltage or Balance
· Technician and Ionization Test Kit are to be grounded.
· With Ionizer operating at normal speed, place Ionization Test Kit centered under Ionizer fan, or 24” from Bench
   Ionizer
· Zero reading, and then allow sufficient time for reading to stabilize.
· Record Offset Voltage or Balance in volts, noting polarity.

If you receive a Fail result
· Remove filter and repeat test. If it passes, this indicates a maintenance schedule problem.
· Clean Ionizer emitter pins and repeat test. If it passes, this indicates a maintenance schedule problem.
· If it still fails, tag the ionizer as not to be used, and initiate corrective action report

Emitter Pin Cleaning Instructions:
Emitter pin cleaning is very simple and should be done frequently. TURN THE IONIZER OFF. Blow off contaminants on the emitter assemblies and fan guards with clean dry air. If the ionizer does not return to proper balance, then you may need to clean each emitter point more thoroughly. TURN THE UNIT OFF AND DISCONNECT THE POWER CORD. With a non-linting swab or small brush dipped in isopropyl alcohol wipe each emitter needle thoroughly. Brush off emitters to assure that stray filaments of cleaning material are completely removed. A soft cloth and alcohol may be used to clean each fan guard.
Emitter Needle Replacement
The tri-metallic emitters should not require replacement unless broken or damaged. Contact Desco if replacement is required.