Product Description; Storage And Maintenance; Safety Precautions - Mettler Toledo InLab 605 O2 Instrucciones Generales

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Instruction manual InLab
1

Product description

1.1 Utilization, conformity and identification
The InLab 605 is a polarographic oxygen sensor (Clark principle) designed for the simul-
taneous measurement of dissolved oxygen and temperature in water applications. The ro-
bust IP67 connectors provide waterproof performance in outdoor or industrial applications.
The InLab 605 represents a state-of-the-art product and is built under the strict quality
guidelines for ISO 9001. The serial number is engraved on the sensor head for traceabil-
ity.
1.2 Key data and characteristics
Length
Diameter
Connectors
Temperature sensor
Shaft material
Membrane material
O-Ring material
Temperature range
Humidity
Media
1.3 Equipment features and scope of delivery
The oxygen sensor is shipped with a silicone membrane body in place and filled with elec-
trolyte, thus it is ready for use. The InLab 605 features a built-in temperature device (NTC)
that allows for automatic compensation of temperature changes.
2 Safety
Please read this instruction manual entirely before using the sensor.
3 Measuring dissolved oxygen
3.1 Initial start-up
For instructions concerning the connection of the IP67 cable to the instrument, please refer
to the instrument instruction manual.
Notice: The protective cap at the tip of the sensor should be removed before putting the sen-
sor into operation. When the sensor is installed for the first time or has been disconnected
from the instrument for longer than 5 minutes, the sensor must be polarized before cali-
bration or the first measurements. This can be achieved by connecting the sensor to the in-
strument for at least six hours. If the sensor has been disconnected for less than 5 minutes
a polarization time of 10 minutes suffices.
3.2 General hints
There should be enough fluid circulation at the head of the sensor. At least 1 liter per hour
should pass by the membrane. Either the sample needs to be stirred or the sensor should
be used in a place with natural flow (e.g. river). Placing the sensor in a dead spot would
lead to false results (too low). It is preferable to hold it at an angle against the flow to
achieve the best possible measurement. An angle of 15 to 75° against the flow prevents
the accumulation of air bubbles on the sensor head.
4

Storage and maintenance

The sensor and the membrane must be cleaned before storing the sensor. The sensor can
be stored for several months, provided it is filled with O
is placed over the membrane. To avoid the 6 hour polarization requirement after storage,
the sensor can be stored connected to the instrument. After storage > 3 months the electrolyte
should be replaced. If storage > 6 months is intended the sensor should be stored dry, with-
out electrolyte.
When used in water applications, the sensor is designed to require minimal service. How-
ever in some cases it can be necessary to recalibrate the sensor or to change the elec-
trolyte or the membrane body. The calibration interval depends on the required accuracy and
individual use of the sensor. Therefore, a general recommendation cannot be made.
4.1

Safety precautions

Danger: the electrolyte has an alkaline pH value of 13. Contact of the electrolyte with the
skin, especially mucous membrane or eyes, should be avoided. If such contact occurs, the
affected area should be well rinsed with running water. Get medical attention if adverse
4
®
605 O -Sensor
2
120 mm
12 mm
IP67 BNC / Cinch
NTC
PPS, glass fiber reinforced
Silicone / Teflon (reinforced with steel mesh)
Viton, Silicone
0...60 °C
0...100% rel.
The sensor is designed for use in aqueous samples.
26.1.2009
electrolyte and the protective cap
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