Recorder Print Head Adjustment; Pump Test (5) - Datascope Accutorr Plus Service Manual

7.5.6.1 Recorder Print Head Adjustment

NOTE: This test and adjustment is performed only after a new printhead is installed.
1. Disconnect the printhead ribbon cable from the connector.
2. Check the oscillator frequency at TP-1 on the recorder control board. Proper frequency
selection is determined by the printhead sensitivity. (The sensitivity rank is marked
on the bottom side of the printhead flex cable, near the 90É bend in the cable.) See
table 7-5.
Table 7-5
3. Adjust R-1 to the correct frequency. PRECAUTION: Increasing printhead
operating frequency beyond the specified limits will shorten the printhead life or result
in immediate permanent damage.
4. Reconnect the printhead ribbon cable, and run a test strip to confirm proper print
density. The print density is equally dependent on the printhead temperature, as well
as on the sensitivity of the chart paper used. We recommend that the standard
Datascope chart paper for this printer be used for the print test.

7.5.7 Pump Test (5)

Select Room Number 5 and press NIBP Start key to activate the test.
This test evaluates the ability of the pump to pressurize a fixed volume represen-
tative of an adult cuff to a typical adult pressure.
A fixed volume of 700 cc is pumped to a pressure of 300 mmHg. While the pump
is operational, the elapsed time is displayed in the Timer/Temperature
display. When the target pressure is reached, the elapsed time display holds its
current reading and the pump deflates the chamber for another test. The test
passes if the chamber is inflated in less than 35 seconds. Pressing the deflate key
at any time during the test causes the NIBP module to open all valves and ends
the test. Pressing and holding the deflate key for three (3) seconds clears the MAP
display and exits the test.
Bleed Rate Test (6a, 6b)
Press the NIBP Start key to activate the selected test. See table 7-6.
This test evaluates the ability of the instrument to maintain a constant bleed rate, for
the purpose of accurate and repeatable NIBP measurements. This test also evaluates
the ability of the system to reduce cuff pressure quickly.
7-8
Print Head Rank
A
B
C
Oscillator Output (KHz)
Minimum
9.7
10.5
11.6
Accutorr Plus Service Manual
Maximum
10.9
12.1
13.4
Chapter 7 - Calibration