
8
8
8
8----3
3
3
3
Reassemble the chamber and manifold and attach the assembly to the case
panel. Reattach the injection block to the top of the sample chamber.
Remember to return the stir bar to the chamber. Install new O-rings or a new
membrane if necessary, and install the probes. Extra O-rings are supplied in
your Preventative Maintenance Kit.
8.4 Membrane Replacement
To assure proper performance and prevent unexpected downtime, we
recommend that you replace lactate membranes every 14 days. See Section 3.4
for membrane replacement procedure.
8.5 Probe Cleaning
With normal use, enzyme sensors may become fouled and cease to operate in a
normal mode. A fouled sensor’s output current will decrease and calibration
may become unstable.
Since the severity of fouling will vary, listed below are methods of cleaning
which should be matched to the cleaning needs. Follow the steps carefully and
in order.
Sensor Maintenance
Sensor Maintenance
Sensor Maintenance
Sensor Maintenance
It is necessary to maintenance the enzyme sensor when the 1503 PM kit is
installed and periodically as needed.
1. Remove the enzyme membrane and hold the probe with the electrodes facing
up.
2. Wad a small portion of a lint free tissue and wet it with 70% isopropyl
alcohol.
3. Using your thumb, press the alcohol soaked wad against the probe’s surface
and rotate the probe back and forth.
4. Rinse the sensor with reagent grade water and return the sensor to normal
service.
Sensor Cleaning an
Sensor Cleaning an
Sensor Cleaning an
Sensor Cleaning and Reconditioning
d Reconditioning
d Reconditioning
d Reconditioning
The following procedure is recommended to be used only when the enzyme
sensor stops operating normally and the above maintenance procedure is
ineffective. This is not a routine maintenance procedure.
1. With the membrane removed, immerse the sensor in a 14% solution of
ammonia for 3 minutes.
2. Immediately after soaking, rinse the sensor with reagent grade water for 3-5
minutes. It is important that all the residual ammonia is removed.
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