Revised 4/11/08 5-5
RS-232 Interface
Tympanometry and Reflex test results record
Character
Number
Number of
Characters
Data
Type Field Name Field Description
1 1 ASCII Start of record “.”
2 1 ASCII Record Type “x”
3 1 ASCII Record
Sequence
Number
“0” to “9”
4 1 ASCII Record Index
Number
“1” to “8”
5 1 ASCII Total Record
Number
“1” to “8”
6 5 ASCII Reserved Reserved for future use. Defaulted to “------”
11 2 uChar Ear Ear under test
Bit 0 = 1 = Left ear under test
= 0 = Left ear not under test
Bit 1 = 1 = Right ear under test.
= 0 = Right ear not under
test
Bits 2-7 = Not used
Either the RIGHT ear is selected OR the LEFT ear
is selected. Both ears selected or no ear selected is
invalid.
13 4uintECV
Ear canal volume in
cm
3
measured at +200daPa,
stored as ECV x M.
Range = 0.00 to 6.00
cm
3
17 4uintPeak
Compliance
Peak compliance in
cm
3
, stored as compliance x
64.
Range = 0.00 to 6.00
cm
3
21 4 sint Peak Pressure The pressure where the peak compliance occurred,
stored in daPa.
Range = 399 to 200 daPa
25 4 sint Gradient Gradient value calculated as the pressure difference
at the compliance half-peak points stored in daPa.
Range = -1 to 500 daPa
-1 = No gradient has been calculated
yet
0 = No gradient could be calculated.
29 2 sChar End Index The data index where the last compliance data point
is stored.
Range = -1 to 87
-1 = No data was stored.
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