YSI 95 - Manual (Page 22)

Troubleshooting Section 8
YSI Incorporated Model 95 18
10. Main reads “Undr” Probe current too low to calibrate
10. Main display reads “FAIL”
(Secondary display reads “eep”)
A. EEPROM has failed to respond in
time. A. Return the system for service (Section 9)
11. Readings on main display don’t
change
A. Meter is in recall mode. A. Press MODE button to return to
Normal Operation (Section 4)