Fresenius Medical Care 2008k Technical Manual page 141

SCREEN 5: ON-LINE CLEARANCE
ACOND = Conductivity derived through the actuator board.
AFREQ = The frequency measured by the actuator board which corresponds to non-
temperature compensated conductivity.
BCV = Actual balancing chamber volume as per tow strokes (example 609 = 60.9 mL).
!ECH = Number of times no echo signal was received. This is a communication signal
between actuator board and functional board.
!ACK = Number of times no acknowledge signal was received. this is a communication
signal between actuator board and functional board.
!SUM = Number of bad check sums. This is a communication signal between actuator
board and functional board.
I>50 = The number of times the 50mS interrupt was exceeded.
CELL = Slope criteria for conductivity calculation (condo = slope *frequency + offset :
example 2026 = 2.026).
CREF = Frequency measurement of the reference resistor done during conductivity
calibration.
COFS = Offset value used in the calculation of conductivity (condo = slope * frequency +
offset : example 2394 = 2.394).
OTST = Results from 0 on-line clearance test. Less than 25 is needed for the test to pass.
TPRE = Temperature pre-dialyzer (example 3847 = 38.47ºC).
TPOS = Temperature post-dialyzer (example 3847 = 38.47º)
CPRE = Conductivity pre-dialyzer (example 14184 = 14.184mS).
CPOS = Conductivity post-dialyzer (example 14184 = 14.184mS).
CPRE
STABLE AT = Conductivity value of pre-dialyzer sensor when it stabilizes (example 15800 =
15.800mS). This is the pre-conductivity value used in calculating KEU.
CPOS
STABLE AT = Conductivity value of post-dialyzer sensor when it stabilizes (example 15466 =
15.466mS). This is the post-conductivity value used in calculating KEU.
FPRE = Frequency pre-dialyzer. This value is used in calculating pre-dialyzer
conductivity. NOTE: Frequency is read as cycles per second, but this value is
read as cycles per 2 seconds or twice the frequency (example 11290 = 5645 hertz).
FPOS = Offset Frequency post-dialyzer. This value is used in calculating post-dialyzer
conductivity, but is offset so it does not interfere with the CPRE frequency.
NOTE: Frequency is read as cycles per second, but this value is read as cycles per
2 seconds or twice the frequency (example 14290 = 7145 hertz).
2008K Technician's Manual
Section VII – Troubleshooting
VII-9