Extech Instruments Model 407510 Manual

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407510-en-GB_V7.6 7/15

Probe Storage

For short term storage, the probe should be stored in a moist environment to keep the membrane

from drying out and needing replacement. Moisten the sponge with distilled water in the protective

cap. Do not store it directly in the water since that could encourage algae growth on the probe.

Probe Head Replacement

The probe head on the tip of the probe holds a thin Teflon® membrane and an electrolyte

container. Calibration or reading errors could indicate loss of electrolyte or a dirty/damaged

membrane. The membrane is very delicate and can easily be damaged if it comes in contact with

solid objects. Replacement probe heads are available from your local distributor.

Replacement procedure

1. Unscrew the probe head and electrolyte container from the probe handle and discard.

2. Fill the new probe head/electrolyte container with electrolyte.

3. Screw the probe head onto the probe handle. Excess electrolyte may be forced out through the

threads. Wipe clean.

4. Lightly tap the probe to remove any air bubbles.

1. Probe handle

2. Temperature sensor

3. Probe Head