Ambulatory Blood Pressure Monitor 90217 Service Manual
4-5
Maintenance
Preparation
• Carefully read through these procedures
• Connect the communications cable to the IR port on the 90217
• Load the Production Test Aids software (Xmain.exe) onto the hard disk of the computer
system
• Copy the 90217 RAM code into same directory as Xmain.exe program (Production Test Aids
software)
• Ensure that charged batteries (3) are installed into the 90217 monitor
Note:
A voltimeter may be used to check battery condition.
NiCad: 1.30 V = full charge (> 1.25 V minimum)
Alkaline: 1.56 V = full charge (> 1.50 V minimum)
Pre-calibration Checks
1 Remove the back cover on the 90217 monitor.
2 Measure the +4.608 volt reference (TP7) on the Main Board.
a Place a magnet near the IR port on the monitor (or connect the IR cable to the port).
b Switch ON the monitor power.
c Connect a DC voltmeter positive lead to TP7 (+4.608) and the negative lead to TP9
(ground). Refer to the following figures for test point locations.
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