ABL77 Service Manual Chapter 4: Test and Calibration Procedures
Original Fluidics System
Introduction
Follow this procedure to determine which valve is malfunctioning on a valve board
with replaceable valves and the original fluidics system.
Materials
required
• One sensor luer (P/N 902-683)
• One Valve board calibration cassette (P/N 920-729)
• One 3cc syringe
• Two luer caps or equivalent
• One index card or equivalent
• Forceps or equivalent
Preparation
Follow these instructions to prepare for the valve test procedure.
Stage Description
A.
To access the fluidics, carefully separate the lower module from the
main housing without disconnecting cables and/or tubing.
B. Turn on the analyzer and boot up to the Main Menu. Proceed to the
Hardware screen.
C. Modify the index card to fit in the door slot. The door indication in the
Hardware screen changes from 1 to 0. This allows for proper
operation of Pump Cal1 and Pump Cal 2.
D. Test the syringe. Cap off the syringe and check that it does not exhibit
a loss of vacuum.
NOTE: The gradual loss of vacuum is the most difficult to detect. The following
technique is to be used during the procedure when the application of vacuum is
required.
• Apply the (fully depressed plunger) syringe to the fluidics and pull the plunger to
its maximum travel.
• Release the plunger and carefully note its resting position.
• Repeat four more times while observing its resting position after each pull.
• No loss of vacuum is said to occur when the plunger has returned to the same
location after five pulls.
• A gradual loss of vacuum is said to occur when the plunger comes to an
increasing resting distance from the first pull.
Continued on next page
Rev. F 4-19
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