GE TONOPORT V Service Manual page 22

7-2
Troubleshooting Guide / Error Codes:
Code
E 26 Systolic pressure below measuring range.
E 27 Systolic pressure above measuring range.
E 29 Insufficient number of oscillations detected: For a correct
measurement, the system must detect a minimum of 8 oscillations.
Tighten the cuff so that one finger, but not two, can be inserted
between the patient's arm and the cuff. At the same time the device
switches to a deflation rate of 4 mmHg/s. When it detects more than 13
oscillations later on, the rate is changed to 6 mmHg/s.
TONOPORT V
2001589-094
Explanation
Revision D