Operation Manual
Version: 12/01
65
er900L Operation Manual
Art-Nr: 475.043
Ergometer
Type er900L
Transmission Protocol:
In contrast to purely digital transmission, ECG type P4 protocol always responds, upon
demand, with a standardized data record. The string consists of 54 alphanumeric char-
acters with „Carriage Return“ and „Line Feed“ as line delimiters. The RS-232 will only
accept the „S“<CR> command. All other characters will be ignored. Ergometry cannot
be terminated with an interface command. Ergometry will automatically terminate, at
the latest, six minutes after the test subject ceases to pedal. Blood pressure error
measurements are discernible in that all values in the data string are set to „000“.
Control flow with P4 :
Remark:
NR.xx, SYST: xxx mmHg , DIAST: xxx mmHg ,PULSE: xxx/min <CR><LF>
measurement no. diastolic value
systolic value heart rate value
Start command sent from controlling device (e.g. ECG)
S<CR>
The ergometer will begin the ergometry by taking the quiescent blood pressure measurement. After
the blood pressure measurement is completed, the following string will be sent from the ergometer.
NR.01,SYST:xxxmmHg,DIAST:xxxmmHg,Pulse:xxx/min<CR><LF>
The pre-set load will be applied after the data record has been sent.
Every subsequent blood pressure measurement
must be requested with the
„S“<CR> command.
After every new start command a new blood pressure measurement will be taken and then the data record
(as below) reported.
NR.xx,SYST:xxxmmHg,DIAST:xxxmmHg,Pulse:xxx/min<CR><LF>
Appendix A: Interfaces
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