Pressure Check - ADInstruments Human NIBP Nano Owner's Manual

Figure 2–22
Human NIBP Nano
Interface Front panel
38
HCU Unit cannot be zeroed
If LabChart is unable to start sampling and is returning error messages
stating "HCU not zeroed" (or if "HCU not connected" appears in the
comments log), this is due to a problem with the Human NIBP Nano Wrist
Unit. This problem is also evidenced by HCU Pressure channel showing 200
mmHg, even aft er repeatedly zeroing and unplugging and reconnecting
the HCU unit.
Steps to carry out if you encounter this problem:
1. Try powering off and restarting the Human NIBP Nano Interface. If
this does not solve the problem, try following steps 2 and 3 below.
2. Ensure you hold the HCU transducer and the reference point at the
same level before zeroing.
Step 2
Device not found by LabChart
The Human NIBP Nano is not always recognized by LabChart when directly
plugged into USB ports with certain chip sets. If the device appears in
Windows' Devices and Printers dialog, but is consistently not found by
LabChart, please connect the device to a diff erent USB2 port or use a USB2
hub to connect to the malfunctioning port.

Pressure check

Pressure generated by the Human NIBP Nano should be checked at least
once a year, or when there is any doubt about the validity of the finger cuff
pressure readings.
Human NIBP Nano Owner's Guide