GE b30, Technical Reference Manual

Page: 143 / 252

Parameters
5-17
Document no. 2044677-001
4.3 STP Module
Record Data prints out the shown service
data and board information (id, serial number
and sw id) onto the recorder.
Temp Test activates the automatic
temperature test for the temperature
channels T1 and T2. The result from the test is
shown in the service data field.
NOTE: The Temp Test needs to be selected
twice before the test starts.
Service Data field
Gain is a coefficient to compensate gain
error. Usually the values for P1 and P2 are
between 17000 and 25000 and for T1 and T2
between 13000 and 14300.
Zero indicates
the offset compensation value of each
parameter in the A/D converter. Typically the
values for P1 and P2 are within
±
1000 and for
T1 and T2 between -150 and +300. Calibrate
if zero and/or gain value is outside the
ranges.
Cable shows ON when a corresponding cable
is connected to the front panel and Probe
shows ON when a corresponding probe is connected to the cable.
Under
Value , the measured numeric values are displayed simultaneously. Pressure values are real time
values and shown in mmHg. Temperature values are shown in degrees Celsius.
The front panel STP keys functions are confirmed by pressing each key and observing that
OFF turns to
ON at Button .
SpO2 shows the measured beat-to-beat SpO
2
value. Modpr is a modulation % that indicates the AC/DC
ratio in the measured signal. Hr is a pulse rate calculated from every beat.
Cable and Probe can be either OFF or ON, and these indicate the state PROBE OFF.
Under them there is a message field for SpO
2
. It can be OK, PULSE SEARCH, NO PROBE, PROBE OFF, NO
PULSE, ARTEFACT, POOR SIGNAL, or CHECK PROBE.
Balance between leds is adjusted by changing the intensity of red/infrared. Intensity of infrared (
Ired
Int. ) is in the range of 40 to 255 and red intensity ( Red Int. ) is in the range of 40 to 255.
DC gain shows the gain of DC signal adjusted by the module.
IDC is the value of infrared signal.
RDC is the dc value of red signal.
AC gain is the gain of infrared and red ac signals. AC gain values can be 1 or 0. Value 1 means high ac
gain and 0 means low gain.
Pre gain is a preamplifier gain for infrared and red signals. Pre gain values can be 1 or 0. Value 1 means
normal operation. Value 0 means that signal levels are very low and extra gain is taken into use.