EVOM™ Manual
World Precision Instruments 5
EVOM™ Manual Benets
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 verication
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
Notes and Warnings
Choice of current/range: The EVOM™ Manual has three ranges of current from
2µA to 10µA and each current range has its own resistive upper limit up to 100K Ω:
• 10K Ω range = 10 µA
• 50K Ω range = 4 µA
• 100K Ω range = 2 µA
The auto range will adjusts the current as needed from 2 µA to 10 µA depending on
the resistance.
General rules
• The higher the current, the greater the stability of the measurement. The xed
ranges may be more consistent with a xed current for some cell lines.
• If a cell line is not expected to read above 10K Ω, then choose that xed range.
Use of the charger: The EVOM™ Manual's Li-ion battery lasts 8 hours on its own. The
charging time is 5.5 hours with the unit powered o. The EVOM™ Manual charger
should not be plugged in all the time. The charger may be used to power the EVOM™
Manual for normal and long-term use.
NOTE: In the higher resistance ranges (50K -100K) there may be a slight instability
added from the noise of the power supply, in that case unplug it during those
measurements.
USB Drives: WPI has supplied a tested USB ash drive. Most drives of 32 GB (USB2.0)
or smaller sizes have been tested.
To Next Page
