Respironics BiPAP Focus - Page 44

Chapter 5
5-12 BiPAP® Focus™ Ventilator Service Manual © Respironics, Inc. REF 1029568 Rev A
Diagnostic Mode and Troubleshooting
+18Vin 18VIN_MEAS Measurement of +18V (mains input)
Count limits: 882 to 1008
Voltage(V) = counts * 0.019043
+18V Boost 18V_BOOST_MEAS Measurement of +18V_Boost supply
Count limits: 923 to 1020
Voltage(V) = counts * 0.019043
VBATT/VTEMP VBATT_VTEMP_MEAS Battery Temperature measurement when
unit operating from Mains or Battery
Voltage measurement when operating on
battery.
Counts limit (volt.): 624 to 936
Voltage(V) = counts * 0.012817
Counts limit (temp.): 79 to 421
Within limits - battery temp ok.
VOptoCap OPTO_CAP_MEAS Measurement of backup capacitor voltage
on User Interface Board.
Count limits: 616 to 782
Voltage(V) = counts * 0.005371
Board Temp BOARD_TEMP_MEAS Measurement of temperature on the User
Interface PCB
Count limits: 233 to 540
Temp. (degC) = ((counts * .00244) - 0.6) *
100
Ambient Temp TEMP_DATA Measurement of Ambient Temperature
within the unit
Limits : 0 to 60degC.
+18VINCMP VIN_COMP_BUF Signal for detection if the incoming mains
voltage is above a certain threshold
(15.64V typically).
Hi: Above threshold
Lo: Below threshold
Sensor Readings Defined
Diagnostics Label Actual Measured Value Description
Table 5-1: Sensor Readings Defined (Sheet 2 of 4)