User Guide

31
TWIST
AND
PULL
fig. 1
UNSCREW
fig. 2
PROBE & MEMBRANE MAINTENANCE
The oxygen probe body is made of reinforced
plastic for maximum durability.
A thermistor temperature sensor provides tem-
perature measurements of the sample tested.
It is always recommended that the protective
cap be kept on the probe when the probe is
not in use to provide protection against dam-
age and dirt.
To replace the membrane or refill with
electrolyte, proceed as fol-
lows:
• Remove the protective
cap by gently twisting
and pulling it off the
body of the probe (see
fig. 1).
• Unscrew the membrane
cap by turning it coun-
terclockwise (see fig.2).
• Wet the sensor by soak-
ing the bottom 2½ cm
(1") of the probe in elec-
trolyte (HI 7041S) for 5
minutes.
• Rinse the new mem-
brane cap (HI 76407A)
supplied with the meter
with electrolyte solution
while shaking it gently.
Refill with clean electro-
lyte solution.
• Gently tap the sides of
the membrane cap with
your finger tip to ensure
that no air bubbles re-
main trapped. Do no di-
rectly tap the bottom