Gambro Prisma System Calibration Instruction

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Prisma System
Scale Diagnose and Calibration Procedures

BEFORE YOU BEGIN

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Read complete description of Scale Diagnose and Scale Calibration procedures in
Prisma Service Manual
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These instructions are not meant to replace the Prisma Service Manual instructions

ENTER SERVICE MODE

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Insure Prisma machine is turned off
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Simultaneously press and hold the softkeys 4 and 9 as shown below. Press the power
switch on and hold the softkeys until the PRISMA Service Screen displays.
4

DIAGNOSE SCALES

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Access Service Mode per above procedure
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Press Diagnose softkey to access Service-Diagnose Screens (for a complete description
of "Service-Diagnose Screens", consult Prisma Service Manual, page 5-11).
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Press Scales softkey to access the diagnose screen for scales
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Observe values displayed for A/D and Averaged-grams displayed on Prisma screen. The
values should be as follows:
A/D values: The A/D Monitor and Control readings are displayed as bits. Each bit
o
represents the voltage signal at the scale and each bit is approximately equal to 1
gram. When there is no weight on the scale, -3000, +500 should be displayed as
the A/D control and monitor readings.
Averaged-grams: When no weight is applied, the Averaged-grams readings
o
should be 0, + 7 grams. If you wish to check the calibration of the scales, you can
2002 Gambro Renal Products, Inc. P/N 306100068 Rev A
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