Instruction manual

120-00004 REV A 10/6/2011 4000 DIGITAL MANUAL PAGE 17
distilled or deionized water into the sensor via the red plug, using
the plastic syringe (provided).
Refer to (fig. 7 pg. 16). Refillable sensors are identified by the red
fill plug in the side of the sensor. The fill plug location may vary
from (fig. 7 pg. 16). There are two types of refillable sensors. The
S-type is a shorter sensor of slightly over 2 1/2 inches ( 64 mm) in
height; the P-type is almost 4 inches (104 mm) in height. “P” and
“S” type sensors connect to the analyzer by different connection
methods.
For portable survey monitors, the sensor should be removed and
weighed every 1 to 2 months, depending upon usage. Again it is
advisable not to exceed a maximum weight loss of more than 25
grams.
Sensor weight is restored be removing the sensor from the
analyzer and comparing the current weight of the sensor with its
original weight (in grams). Sensor weight is indicated on a label
located on the side of the sensor.
There are three types of gas fittings used depending on the age of
the original sensor and the gas being measured.
(fig. 8)
Male elbow ¼ O.D. tube compression fitting
This is a compression fitting comprised of the body, nut and two
ferrules (fig. 8). Disconnect by loosening the nut until the tubing
can be pulled away from the body. To re-attach insert the tubing
and tighten the nut. Do NOT over tighten the nut as this will
damage the nut and fitting