Hach-Lange LDO101-03 User Manual

Instruction Sheet

LDO101-01 or LDO101-03 Probe

CAUTION
BEFORE ATTACHING THE PROBE FOR THE FIRST TIME: Set the date and time in the
meter before attaching the probe for the first use. If the meter date and time are
changed after the probe is installed, the probe will retain an incorrect time stamp for the
remainder of its service life, even if the meter time and date are later corrected.

Safety

To ensure that the protection provided by this equipment is not impaired, do not use or install
this equipment in any manner other than that specified in this document.

This symbol, if noted on the instrument, references the instruction manual for operation and/or safety information.

Electrical equipment marked with this symbol may not be disposed of in European public disposal systems after 12
August of 2005. In conformity with European local and national regulations (EU Directive 2002/96/EC), European
electrical equipment users must now return old or end-of life equipment to the Producer for disposal at no charge to
the user.

Note: For return for recycling, please contact the equipment producer or supplier for instructions on how to return
end-of-life equipment, producer-supplied electrical accessories, and all auxiliary items for proper disposal.

LDO10189

Overview

Figure 1 shows the LDO101-01 or LDO101-03 Probe, a luminescent dissolved oxygen (LDO)

electrode. The probe can be equipped with a 1- or 3-meter cable. The probe is designed for
fast, accurate measurement of dissolved oxygen concentration in wastewater, drinking water,
and general applications.

Each electrode is supplied with color-code clips for easy identification. There are two each of
five colors (black, yellow, light green, light blue, and magenta), one for the electrode and one
for the cable connector. Attach a pair of color-code clips to the electrode and cable connector.

Replacement sensor caps (including the iButton) are available (Cat. No. 58112-00).

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LDO101-01 or LDO101-03 Probe

Figure 1 The LDO101-01 or LDO101-03 Probe

1 Probe Body with Shroud 4 Pressure-sensor Module

2 Locations for Color Code Clip Installation 5 iButton

3 1- or 3-meter Cable 6 Cap

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iButton is a registered trademark of Maxim Integrated Products, Inc.

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Removing and Replacing the Shroud

The LDO101 Probe comes fully assembled. Remove the shroud to change the sensor cap
or calibrate the probe. Refer to the Sensor Cap Instruction Sheet for information on
changing the sensor cap (Cat. No. 5811289).

Removing the Shroud

1. Hold the shroud (Figure 2, item 1) and unscrew the locking ring.

2. Slide the shroud and locking ring (Figure 2, item 2) off the probe.

Replacing the Shroud

1. Slide the locking ring (Figure 2, item 2) onto the probe, with the threads toward the

shroud.

2. Slide the shroud (Figure 2, item 1) onto the probe body. Rotate the shroud and move it
up or down the probe body, so that the locking ribs (Figure 2, item 8) on the probe
body are in between the locking ridges in the shroud (Figure 2, item 9).

In the correct position, the relief on the side of the shroud will align with the wide
portion of the probe body (Figure 3). The shroud will move only a few millimeters up
and down the length of the probe prior to tightening the locking ring, and the locking
ring will easily thread onto the shroud.

3. When the shroud is in place, screw on the locking ring and hand-tighten.

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