Fresenius Medical Care 4008 S Service Manual

Chapter 9: Calibration / adjustment
Fresenius Medical Care 4008 S (Version V10) SM-EN 7/01.13 9-53
9.3.1.1 Adjustment using the set for air detector calibration (see adjustment instructions)
As an alternative, an adjustment is also possible without the set for air
detector calibration (see chapter 9.3.1.4 page 9-55).
Measuring equipment UMED, HMED or pressure gauge, adjusting block and checking
(reference) block
Measurement point Air Detector
Calibrating the air detector The device must be in the Service mode,
the jumper J1 / P.C.B. LP 450-2 must be set to the calibration position.
– Fill the spherical recesses of the adjusting block with grease and use
a spattle to remove any excess grease so that only the recesses are
completely filled with grease.
– Place the greased adjusting block into the drip chamber holder (with
the bevelled edges first). It must be ensured that the ultrasonic
sensors click correctly into place in the spherical recesses of the
block. The adjusting block must not touch the holder wall, but must
hang freely between the sensors.
– Turn potentiometer 1 and potentiometer 2 on P.C.B. LP 450-2
clockwise, until the LED D5 and LED D10 on P.C.B. LP 450-2 are
dark.
Slowly (attention: time constant) turn potentiometer 1
counterclockwise, until LED D5 lights.
Slowly (attention: time constant) turn potentiometer 2
counterclockwise, until LED D10 lights (see figure LP 450-2).
– Set jumper J1 / P.C.B. LP 450-2 to the operation position.
LED D5 and LED D10 must both be dark.
– Take the adjusting block out of the drip chamber holder.
Remove residual grease using lint-free cloth and a permissible
disinfectant.
Checking the air detector – Fill the spherical recesses of the test block with grease and use a
spattle to remove any excess grease so that only the recesses are
completely filled with grease.
– Place the greased test block into the drip chamber holder. It must be
ensured that the ultrasonic sensors are correctly positioned in the
spherical recesses of the test block. The test block must not touch
the holder wall, but must hang freely between the sensors.
– LED D5 and LED D10 on P.C.B. LP 450-2 must both be illuminated.
If one or both LEDs are not illuminated, the calibration must be
repeated.
– Take the test block out of the drip chamber holder.
Remove residual grease using lint-free cloth and a permissible
disinfectant.
– In addition, the venous occlusion clamp has to be checked and the
optical detector has to be calibrated and checked
(see chapter 9.3.1.2 page 9-54).

Fresenius Medical Care 4008 S Specifications

General

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