B. Braun Dialog+ - Calibration Conductivity Sensors Bicarbonate BICLF and END Conductivity ENDLF;ENDLF_S

4. TSM Service Program 1/2010 4 - 135
BA-TE-DE08W M.KAY Dialog+ SW9xx_SM_Chapter 4-3-1_1_2010.doc/pdf <110301> yymmdd B. Braun Avitum AG
Dialog
+
SW 9.xx
4.8.3.9 Calibration Conductivity Sensors Bicarbonate
BICLF and END Conductivity ENDLF/ENDLF-S
If the conductivity sensor BICLF or ENDLF/ENDLF-S is exchanged: the
temperature sensors TSBIC, TSD/TSD-S must be calibrated prior to the
calibration of the conductivity sensors BICLF/ENDLF/ENDLF-S.
Conductivity Measurement Instrument
(e.g. HDM 99 or equivalent)
Technical Data:
• Temperature coefficient α = 2.10 %/
o
C (set)
• Reference temperature T
Ref
= 25
o
C (set)
• Correct cell constant (set)
• Conductivity accuracy: ≤ ±0.1 mS/cm
• Conductivity resolution 0.01 mS/cm
• Use calibrated measurement instrument
Prior to Calibration of
BICLF/ENDLF/ENDLF-S
• Perform a chemical disinfection with citric acid 50%
• Wait until Dialog has reached working temperature
• Calibrate temperature sensors TSBIC/TSD/TSD-S
Test and Calibration
Solution for BICLF
The applied acid concentrate used as test and calibration solution (if not
available use acetate) must be diluted according to the prerequisites with
deionised water. The components of the acid concentrate are listed in table 1.
Table 1
Nominal Composition of Ready for Use Dialysate According to Data on Canister
(1 l Acid Concentrate + 1.225 BIC + 32.775 l Deionised Water)
Component Concentration
[mmol/l]
Max. Oscillation
Range
Sodium 138 0
Potassium 2 2
Calcium 1.5 0.5
Magnesium 0.5 0.5
Chlorine 109 3
Acetate 3 1
Bicarbonate 32 1
Glucose 0 g/l 1 g/l
Osmolarity 292 mOsm/l 5 mOsm/l
The following B. Braun acid concentrates can be used:
e.g. SW376A, SW163A, SW 196A, SW127A, SW93A, SW102A, SW380A, SW95A, SW139A,
SW381A, SW178A, SW393A, SW195A
If acid concentrates are not available the following B. Braun acetate concentrates can be used as
an alternative:
e.g. SW44 and SW 174
If acid concentrate from B. Braun is not available acid concentrate from a second source can be
used. The composition is listed in table 1.
Composition of Calibration
Solution for BICLF
Acid concentrate is diluted with deionised water with a ratio of 1:4 (or 1:4.5
with acetate) to calibrate the BICLF sensor, i.e. bicarbonate concentrate is not
used.
Composition of Calibration Solution
for ENDLF/ENDLF-S
The undiluted acid concentrate (if not available use acetate) is used to
calibrate the ENDLF/ENDLF-S sensors (see table 1).
Calibration Points for
BICLF and ENDLF/ENDLF-S
The following calibration points are used:
• Calibration points BICLF: 0 mS/cm, 3 mS/cm, 5.8 mS/cm
• Calibration points ENDLF/ENDLF-S: 0 mS/cm, 14.0 mS/cm
• Conductivity calibration point deviation: 0.2 mS/cm
• Conductivity oscillation range: ± 1 digit/0.1 mS/cm (displayed value of
Dialog) over 10 s, i.e. the conductivity should be constant over a time
period of 10 s.
•
Reference temperature: 38
o
C ±2
o
C