Sper Scientific 850045 Dissolved Oxygen - DO Pen - Manual (Page 10)

PROBE MAINTENANCE
Initial Use
1. Unpack the DO meter and fill the probe head with the
Electrolyte (OXEL-03) fluid provided.
2. Follow the steps shown in Figure 2.
Probe Head & Fluid Maintenance
1. Whenever the DO meter will not calibrate correctly or
the DO reading is unstable, check to see if the
Electrolyte fluid is dirty or has evaporated.
2. If the Electrolyte fluid needs to be replaced, refill the
probe head (completely), following the steps shown in
Figure 2 and recalibrate the DO meter (see page 3)
3. If the fluid has been replaced and the DO meter still
does not calibrate correctly or give a stable reading,
check the probe head diaphragm for damage.
4. The Teflon diaphragm is delicate and can be damaged if
it comes in contact with solid objects or if the meter is
dropped.
10