6
b) The main TIME display reads “*60”, the default
pressure set point, for approximately 1.5 seconds;
c) The main TIME display increases (or decreases)
by units of one until reaching a multiple of 5. Then
the main TIME display increases (or decreases) by
units of 5 to a maximum of 240 (or a minimum of
0), thus altering the time set point;
d) Release the touch-switch. This should cause the
actual time of “0” to be displayed;
e) Once again, press the main TIME INCREASE (or
DECREASE) touch-switch; the main TIME display
should read the last setting from step c (above);
f) Release the main TIME touch-switch;
g) Repeat steps
a
through
f
above for the second
TIME display functional check.
Notes for steps 3 & 4:
1. Anytime an asterisk (*) is displayed in the left dis-
play digit, the data being displayed is its set point.
2. The default factory set point for pressure is 250 mm
Hg.
3. The default factory set point for time is 60 minutes.
5. Calibration Check
Note:
During the power-up diagnostic self-test described
above, the unit, which must hold a tolerance of ± 3 mm Hg,
will test calibration. Should an out of calibration condition
be detected, the unit will display “AMP” “FAIL” in the PRES-
SURE and TIME displays. Even though the unit completes
this check during power-up, the following quantitative check
is recommended at regular intervals.
a) Set the unit to STANDBY by pressing and holding
the ON/STANDBY
(I/O)
touch-switch. Note that the
unit will not be set to STANDBY immediately. The
ON/STANDBY touch-switch has a 2-second delay
built in to help prevent accidental turn off.
b) Wait approximately 10 seconds, then turn the unit
back on by pressing the ON/STANDBY (
I/O
) touch-
switch. Press and hold the second PRESSURE
(+) and (–) touch-switches until “CUFF” “CAL” is
displayed.
c) Connect a calibrated pressure meter, with a mini-
mum range of 0 to 700 mm Hg, to the Calibration
Hose Assembly. See Fig. 1.
d) Connect a pressure source capable of supplying
(at minimum) 700 mm Hg of pressure. See Fig. 1.
e) Insert the second cuff line with connector into the
Second Cuff sense port. See Fig. 1.
f) Insert the main cuff line with connector into the
Main Cuff sense port. See Fig. 1.
g) Apply 50 mm Hg of pressure to the cuff sense
ports. The displays should each read 50 ±3 mm Hg.
h) Increase the pressure to 250 mm Hg. Again, the
displays should each read 250 ±3 mm Hg.
i) Repeat step h (above) for 475 mm Hg.
j) Remove the main and second cuff line from the cuff
sense ports.
k) Press and hold the second PRESSURE (+) and
(–) touch-switches until “RES” is displayed in the
second PRESSURE display. The main PRESSURE
display should be reading 0 ±3 mm Hg.
l) Insert the main cuff line with connector and second
cuff line with connector into the reservoir sense
ports. See Fig. 1.
m) Apply 250 mm Hg of pressure to the reservoir
sense ports. The display should read 250 ±3 mm
Hg.
n) Repeat step m for 475 mm Hg and 700 mm Hg.
o) Remove pressure as well as the main and second
cuff line with connectors from the unit.
p) Set the unit to STANDBY by pressing and holding
the ON/STANDBY (
I/O
) touch-switch.
NOTE: During the calibration check, if any reading is off
by more than 3 mm Hg, the unit must be calibrated. See
CALIBRATION in MAINTENANCE Section 3.
6. Under Pressure Alarm Check
Create a leak in the main cuff while it is inflated. Make the
leak large enough that even though the unit will be attempt-
ing to maintain pressure, the pressure still falls more than
15 mm Hg below set point. Observe:
a) The Main PRESSURE display window indicates
low pressure by “LO-P”.
b) The Alarm Silence Switch illuminates.
c) After approximately 1 second, an audible tone will
sound announcing the low pressure condition. This
delay is used to preclude nuisance alarms.
d) Stop the leak and observe that the pressure re-
turns to within limits, the audible tone ends, and the
Alarm Silence Switch light extinguishes.
Repeat the above procedures for the second cuff.
2.3 INSTALLATION
The
A.T.S.
2000 Tourniquet is designed to be mounted on
a table top or tourniquet stand (REF 60-4022-001). The
adjustment range of the pole clamp on the right side of the
unit will accommodate pole diameters of 0.5 to 1.5 inches
(1.25 to 3.8 cm). Caution: Do not hang articles on the tour-
niquet stand which are not related to tourniquet use.
Inspect and ensure that the correct fuse drawer with ap-
propriately rated fuses is present. 100–120 V uses the grey
fuse drawer with 1.0 A time delay fuses. 220–240 V uses
the black fuse drawer with 500 mA time delay fuses.
Connect the power cord of the unit to a properly polarized
and grounded power source whose voltage and frequency
characteristics are compatible with those listed on the
nameplate of the unit.
The
A.T.S.
2000 Tourniquet is now ready for use.
2.3.1 PRESSURE AND TIME DEFAULT
SELECTIONS
An operator may want to modify the start up default pres-
sure of 250 mm Hg and the default time of 60 minutes for
one or both cuffs.
The following steps will allow a user to customize the de-
fault settings for both cuffs.
1. Prior to any cuff inflation, set the cuff target pres-
sure and the maximum inflation time to the new
desired default values.
2. Press the main cuff PRESSURE (+) and (–) touch-
switches simultaneously and hold until an audible
tone is sounded, indicating that the new default
values have been stored. The display should also
read “UP” “DATE”.
The new pressure and time defaults will be written to non-
volatile storage and will provide the default pressure and
Summary of Contents for A.T.S. 2000
Page 1: ...Operator Service Manual A T S 2000 TOURNIQUET SYSTEM REF 60 2000 101 00...
Page 25: ...23 3 Block Diagram...
Page 28: ...26 11 CPU Board...
Page 29: ...27 12 Power Supply Board...
