WPI EVOM3, Instruction Manual

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4 World Precision Instruments
STX2-PLUS electrode. The EVOM3 qualitatively measures cell monolayer health and
quantitatively measures cell confluence. The EVOM3 produces a low AC current that
avoids electrode metal deposits and adverse effects on tissues which can otherwise
be caused by higher DC currents. The EVOM3 uses low current and voltages and
is designed for non-destructive testing for epithelial monolayer confluence in cell
cultures. In addition, resistance readings are unaffected by membrane capacitance or
membrane voltage. The accuracy and repeatability of the EVOM3-STX2-PLUS system
makes this instrument ideal for permeability, PD and other detailed membrane studies.
EVOM3 Features
• Low noise design offers greater resolution and accuracy
• Automatic 20X sample averaging improves accuracy and stability
• Adjustable fixed measurement currents (2, 4 or 10 μA)
• Resistance auto ranging from 1 Ω to 100,000 Ω or with three fixed current ranges
• Reliable low current, low voltage design prevents metal ion transport
• Fast resistance stabilization on low levels under 200 Ω with resolution to 0.1 Ω
• Ergonomic tilt stand for low glare operation
• Graphical display of popular plates (6, 12, 24, 96) for trend analysis
• The display shows the most recent set of parameters
• Automatic plate indexing operation with or without control well subtraction for
resistance and potential difference (PD) measurements
• Continuous data logging via USB (PC, Mac, Linux)
• Saves date stamped data to a spreadsheet readable file on a USB drive
• Upgradable firmware
EVOM3 Benefits
Eliminates errors and reduces experimental processing time
Auto data logging eliminates the need to track data by hand
The small footprint allows more bench space
Easy calibration and verification
Footswitch for hands-free recording
Prevent data loss with auto save and data recovery when battery
is low
TEER is easily computed by applying a unit area formula to the
resistance