10
7
Display Explanations
1. Pressure:
Deflation Rate (During Measurement) /
Heartbeat Rate (After Measurement)
2. Heartbeat Mark
3. Deflation Rate
4. Calibration Reminder
5. Weak Battery Mark
Installing and Replacing Batteries
1. Rotate the clip 180°.
2. Loosen the screw on the battery cover using a coin
or screwdriver.
3. Install the batteries with the polarities facing in
the correct direction.
4. Replace the battery cover and tighten the screw.
5. Rotate the clip back.
Note:
You should replace the batteries if:
• The weak battery mark appears in the display.
• Nothing appears in the display when the power is switched
on. The supplied batteries may be discharged earlier than
store-bought batteries. Always replace both batteries together.
Warning:
Remove batteries when the unit is not in use for extended periods
of time. Batteries are hazardous waste; please dispose of them properly.
Calibration of Digital Gauge
Gauge accuracy can be checked visually whenever it is switched on. If the unit is used
more than 10,000 times, a calibration reminder message (CAL) will appear on the digital
display. Any digital gauge that displays this message should be returned for re-calibration
to ADC’s Service Department. Only ADC or an authorized service technician is qualified to
perform this calibration service.
Do not attempt to recalibrate the gauge yourself.
In addition to the visual inspection indicated above, we also recommend you
perform the following calibration check on an annual basis:
• Connect your gauge to a high-quality, known pressure standard using ADC’s
“Y” Test Kit (part number 991)
• Pressurize the gauge to 300 mmHg
• Reduce the pressure at a rate no greater than 10 mmHg per second, and stop
to check at the following test points: 300mmHg, 240 mmHg, 160 mmHg,
120 mmHg, and 80 mmHg. Your gauge should be /-3 mmHg of your
reference standard.
ADC recommends using the most sensitive pressure standard possible when performing
this calibration check, as your ability to measure the accuracy of a gauge depends on the
sensitivity of the pressure standard. If you are using a reference pressure standard that is
only calibrated to +/- 3 mmHg (such as a mercury column or aneroid gauge), then you
will only be able to determine the accuracy of the test gauge to /- 6 mmHg. If you
use a reference pressure standard that is +/- .01 mmHg (such as a digital pressure
standard), you will be able to determine the accuracy of the gauge being tested to within
+/- 3.1 mmHg.
In the event that the gauge is ever in need of calibration, simply return to ADC. Damaged
or broken parts will be replaced as needed at a minimum charge. Refer to the warranty for
specific details of warranty coverage.
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