Page 6-20 LTV
®
1200/1150 Ventilator Service Manual p/n 18603-001, Rev. C
3) Set the calibration tool to ΦA. Reconnect the AC adapter to the ventilator. Turn the
ventilator on, silence alarms and enter the CALIBRATION menu. Turn to MOTOR
DRIVE and press Select.
ΦA:+600ma: xxx is displayed where the xxx is a numeric value.
4) The Phase A amp meter will show a positive value. Turn the Set Value knob on the
ventilator right or left until the amp meter reads 600ma, or as close as possible.
Record Pass or Fail on the Calibration Worksheet and press Select.
ΦA:-600ma: xxx is displayed where the xxx is a numeric value.
5) The Phase A amp meter will show a negative value. Turn the Set Value knob on the
ventilator right or left until the amp meter reads -600ma, or as close as possible.
Record Pass or Fail on the Calibration Worksheet and press Select.
ΦB:+600ma: xxx is displayed where the xxx is a numeric value.
6) Set the calibration tool to ΦB. The Phase B amp meter will show a positive value. Turn
the Set Value knob on the ventilator right or left until the amp meter reads 600ma, or as
close as possible.
Record Pass or Fail on the Calibration Worksheet and press Select.
ΦB:-600ma: xxx is displayed where the xxx is a numeric value.
7) The Phase B amp meter will show a negative value. Turn the Set Value knob on the
ventilator right or left until the amp meter reads -600ma, or as close as possible.
Record Pass or Fail on the Calibration Worksheet and press Select.
CAL EXIT is displayed if the calibration was successful.
8) Turn the test tool to Open. Power the unit off and disconnect the AC from the unit.
Disconnect the test tool connections from the vent and reconnect the 4-wire flow valve
cable to the motor board.
If CAL FAIL appears at any time, press Select to exit the calibration. When MOTOR DRIVE
is displayed, press Select and perform the calibration again.
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