Voltage Calibration - Welch Allyn Spot Vital Signs LXi Service Manual

Service Manual

Voltage Calibration

Equipment:
Note
• UUT
• Power supply, 0 to 10 volts, 2 amps capacity or
better
1. Disconnect battery and connect power supply to UUT, observing correct polarity.
Connect DVM to power supply leads at the battery simulator.
2. Set the power supply to 6.5 VDC.
3. Power on UUT in configuration mode (press the check button and power on the UUT).
Hold check button until the UUT beeps twice.
4. Adjust the power supply to 5.5 +/- 0.1 VDC at battery connector simulator leads.
5. Select Calibrate > Voltage on the service computer. The UUT LCD goes blank.
6. Read the voltage on the DMM connected to the battery simulator leads.
7 . Enter this voltage reading into the Actual Voltage field and click Calibration button.
8. Click the OK button to accept the inputs. Click Yes to make the changes permanent.
9. Enter your initials in the Calibration Signature Field and click OK. UUT resets and
powers up in normal mode.
See "Tool list" on page 101 for equipment part numbers.
Calibration and Verification
• Digital voltage meter
• Battery connector simulator
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