Operator's Manual

Rad-97 Chapter 16: Service and Maintenance
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6. Connect the common lead of a digital multi-meter to contact 2 of the of the Nurse
Call interconnection cable phone plug (as shown in the table).
7. Connect the positive lead of the digital multi-meter to contact 1 of the of Nurse
Call interconnection cable phone plug (as shown in the table). Verify that the
resistance is as shown in the table.
8. Trigger an alarm on the Rad-97 (for example, by connecting and disconnecting a
sensor while measuring data). Verify that the resistance is as shown in the table.
9. If using a 3 circuit Nurse Call interconnection cable phone plug, change the
positive lead of the digital multi-meter to contact 3 of the of the phone plug (as
shown in the table). Verify that the resistance is as shown in the table.
10. Trigger an alarm on the Rad-97. Verify that the resistance is as shown in the table.
Nurse Call Cable Type Nurse Call Contact State Multi-Meter Reading
2-Circuit 1 and 2 contacts normally opened OL (open circuit)
1 and 2 contacts nurse call triggered < 25 ohms
3-Circuit
1 and 2 contacts normally opened OL (open circuit)
1 and 2 contacts nurse call triggered < 25 ohms
2 and 3 contacts normally closed < 25 ohms
2 and 3 contacts nurse call triggered OL (open circuit)
Calibration
Noninvasive Blood Pressure
NIBP Module Calibration
Note: This section is provided as a reference and intended for qualified service professionals
only.
Pass Criteria
International standards for automated NIBP devices require that the maximum static
pressure accuracy shall be ± 3mmHg or 2% or the reading, whichever is greater. This is a
stringent requirement and all test equipment must be in excellent working order to properly
perform this test. It is important to verify the calibration before changing it. Historical data
has shown that the transducers rarely need to be re-calibrated although we still suggest that
the calibration be verified annually.