Fresenius Medical Care 4008 S Service Manual

Chapter 9: Calibration / adjustment
9-14 Fresenius Medical Care 4008 S (Version V10) SM-EN 7/01.13
9.1.15 Without menu display: Adjusting the current increasing pulse
–Select CAL. FLOW 300, display: flow (300) = XXX
– The actual flow XXX must be approx. 300; correct with + / – if necessary.
– Connect an oscilloscope to P.C.B. LP 634: MP8, MP1 and ground MP7.
– Using P1, adjust the current increasing pulse according to the figure below. Ensure that the actual flow
(XXX on the display) remains at approx. 300; readjust with + / – if necessary.
9.1.16 Alternative method of adjusting the current increase
(if an oscilloscope is not available)
–Select CAL. FLOW 300. There may be two device reactions.
Either it initiates regular balancing chamber switchings. In this case, proceed as described for case 1.
Or the device is in intrinsic pulse mode ("Eigentakt"). Then proceed as described for case 2.
Case 1: The device runs with regular balancing chamber switchings.
– Display: flow (300) = XXX
– If necessary, correct the flow with the + / – keys until the actual flow
is approx. 300.
– Turn potentiometer P1 in anti-clockwise direction (wait for at least
10 seconds after each revolution!) until the device switches to
intrinsic pulse mode ("Eigentakt").
– Display: flow (300) = 147
– Turn potentiometer P1 in clockwise direction (wait for at least
10 seconds after each half revolution!) until the actual flow is again
approx. 300.
– Turn potentiometer P1 in clockwise direction for another
2 revolutions.
Case 2: The device is in intrinsic pulse mode ("Eigentakt").
– Display: flow (300) = 147
MP1: 1 V/cm
MP8: 2 V/cm
Time base: 1 s
GND
GND

Fresenius Medical Care 4008 S Specifications

General

Brand	Fresenius Medical Care
Model	4008 S
Category	Medical Equipment
Language	English