Hach-Lange MTC10130 User Manual
DOC022.52
User Manual
Gel filled ORP/Redox Probe: Model MTC10101, MTC10103,
MTC10105, MTC10110, MTC10115 or MTC10130
Safety information
Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage to the
instrument could occur if not observed. A symbol on the instrument is referenced in the
manual with a precautionary statement.
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.
Specifications
Note: Specifications are subject to change without notice.
.80033
Specifications Details
Probe type Digital combination electrode with a non-refillable Ag/AgCl reference and a
built-in temperature sensor
Range ±1200 mV
Resolution 0.1 mV
Temperature accuracy ±0.3 °C (±0.54 °F)
Operating temperature range 0 to 80 °C (32 to 176 °F)
Storage temperature range 5 to 40 °C (41 to 104 °F)
Junction Open junction
Reference potential versus Standard
Hydrogen Electrode
Reference electrolyte Electrode filling solution, 3M KCl
Reference type Ag/AgCl (3 M KCl)
Minimum sample depth 20 mm
Dimensions (standard) Diameter: 12 mm (0.47 in.)
Dimensions (rugged) Diameter: 46 mm (1.81 in.)
207 mV at 25 °C
Length: 175 mm (6.89 in.)
Cable length: 1 or 3 m (3.28 or 9.84 ft)
Length: 223 mm (8.73 in.)
Cable length: 5, 10, 15 or 30 m (16.40, 32.81, 49.21 or 98.42 ft)
Cable connection M12 digital output and connector compatible with HQd meters
Product overview
The MTC101 series probe is a non-refillable, gel-filled combination oxidation reduction
potential (ORP/Redox) probe with a built-in temperature sensor (Figure 1). The
MTC10101 or MTC10103 probe is available with a 1 or 3 m (3.28 or 9.84 ft) cable and is
intended for laboratory use. The MTC10105, MTC10110, MTC10115 or MTC10130 probe
1
is available with a 5, 10, 15 or 30 m (16.40, 32.81, 49.21 or 98.42 ft) cable and is
intended for field use. The probe measures absolute mV values in wastewater, drinking
water and general applications.
Figure 1 Probe overview
1 Shroud (rugged model) 6 Locking ring (rugged model)
2 Probe storage cap 7 Rugged probe (5, 10, 15 or 30 meter cable)
3 Probe soaker bottle 8 Standard probe (1 or 3 meter cable)
4 Platinum electrode and temperature sensor 9 Probe storage cap or soaker bottle holder
5 Reference junctions and protective tape (rugged model)
Preparation for use
To prepare the probe for initial use:
1. If a rugged probe, remove the shroud and probe storage cap (refer to Remove the
shroud on page 11
2. If a standard probe, turn the probe soaker bottle cap counter-clockwise to loosen the
cap. Remove the soaker bottle from the probe.
3. If a rugged probe, remove the protective tape from the reference junctions (refer to
Figure 1 on page 2). Dispose of the protective tape.
4. If the probe will be used immediately, prepare the probe for calibration or sample
measurement.
5. If the probe will not be used immediately, store the probe (refer to Storage
on page 11).
To prepare the probe for calibration or sample measurement:
1. If a rugged probe, remove the probe storage cap.
2. If a standard probe, turn the probe soaker bottle cap counter-clockwise to loosen the
cap. Remove the soaker bottle from the probe.
3. Rinse the reference junctions and electrode thoroughly with deionized water to
remove the 3 M KCl solution completely. Blot dry with a lint-free cloth.
4. If a rugged probe, make sure that the shroud is installed before field use (refer to
Install the shroud on page 11).
Note: Damage to the sensing elements can occur if the shroud is not installed during field use.
Damage under these conditions is not covered by the product warranty.
).
2
Calibration
Before calibration:
The probe must have the correct service-life time stamp. Set the date and time in the meter before the probe is attached.
It is not necessary to recalibrate when moving a calibrated probe from one HQd meter to another if the additional meter is
configured to use the same calibration options.
To view the current calibration, push , select View Probe Data, then select View Current Calibration.
If any two probes are connected, push the UP or DOWN arrow to change to the single display mode in order to show the
Calibrate option.
Prepare the probe for use (refer to Preparation for use on page 2).
If a rugged probe, remove the shroud from the probe (refer to Remove the shroud on page 11).
Calibration notes:
•
Additional standards can be selected in the Calibration Options.
• Do not dilute ORP/Redox standards. Use fresh ORP/Redox standard for calibration.
• ZoBell’s redox potential is temperature dependent. The HQd calibration routine
factors in this temperature dependency allowing accurate calibrations within the
temperature range of 0 to 30 °C (32 to 86 °F). Light’s solution should be read at 25 °C
(77 °F). Custom ORP/Redox calibration solution values and temperature are userdefined.
• The calibration is recorded in the probe and the data log. The calibration is also sent
to a PC, printer or flash memory stick if connected.
• Air bubbles under the sensor tip when submerged can cause slow response or error
in measurement. If bubbles are present, gently shake the probe until bubbles are
removed.
• If a calibration error occurs, refer to Troubleshooting on page 12.
1. Connect the
probe to the
meter. Make sure
that the cable
locking nut is
securely
connected to the
meter. Turn on the
meter.
Calibration procedure:
2. Push
Calibrate. The
display shows the
ORP/Redox
standard solution
that is necessary
for calibration.
3. Add the fresh
ORP/Redox
standard solution
to a beaker or an
appropriate
container.
4. Rinse the
probe with
deionized water.
Blot dry with a lintfree cloth.
5. Put the probe
in the standard
solution so that
the temperature
sensor is
completely
submerged. Stir
gently. Shake the
probe from side to
side in the sample
to refresh the
reference junction.
3
6. Push Read.
Stir gently. The
display will show
"Stabilizing" and a
progress bar as
the probe
stabilizes in the
sample. The
display shows the
standard solution
value and the mV
offset when the
reading is stable.
7. Push Done to
view the
calibration
summary.
8. Push Store to
accept the
calibration and go
back to the
measurement
mode. If a rugged
probe, install the
shroud on the
probe (refer to
Install the shroud
on page 11).
Sample measurement
Before measurement:
The probe must have the correct service-life time stamp. Set the date and time in the meter before the probe is attached.
If complete traceability is necessary, enter a sample ID and operator ID before measurement. Refer to the HQd meter
manual for more information.
Regular calibration is required for the best measurement accuracy (refer to Calibration on page 3).
Prepare the probe for use (refer to Preparation for use on page 2).
Make sure that the platinum disc is clean and smooth (refer to Clean the probe on page 11).
To deploy a rugged probe at a distance, toss the probe body with a gentle underhand throw. Do not swing the probe by the
cable as this may cause injury to the user, will cause severe strain on the cable and will shorten the service life of the cell.
Damage under these conditions is not covered by the product warranty.
Measurement notes:
•
Data is automatically stored in the data log when Press to Read or Interval is
selected in the Measurement Mode. When Continuous is selected, data will only be
stored when Store is selected.
• Air bubbles under the sensor tip when submerged can cause slow response or error
in measurement. If bubbles are present, gently shake the probe until bubbles are
removed.
• If a measurement error occurs, refer to Troubleshooting on page 12.
Measurement—direct method procedure:
4
1. Connect the
probe to the
meter. Make sure
that the cable
locking nut is
securely
connected to the
meter. Turn the
meter on.
2. To significantly
reduce the
stabilization time
for reducing-type
samples, put the
platinum disc in
Reducing Solution
for ORP
Electrodes for
3-10 minutes
before the initial
sample
measurement.
3. Rinse the probe
with the sample.
4. Put the probe in
the sample and
stir gently. Make
sure that the
reference
junctions are
completely
submerged. Do
not put the probe
on the bottom or
sides of the
container. Shake
the probe from
side to side in the
sample to refresh
the reference
junction.
5. Push Read.
The display will
show "Stabilizing"
and a progress
bar as the probe
stabilizes in the
sample. The
display will show
the lock icon when
the reading
stabilizes. If
necessary for the
application, record
the sample pH
and temperature.
6. Repeat steps
3-6 for additional
measurements.
Temperature (°C) Electrode potential in mV (E
7. When
measurements
are done, store
the probe (refer to
Storage
on page
11).
Measurement—conversion to SHE reference procedure:
For some applications, it is customary to report redox potential readings relative to the
standard hydrogen electrode (SHE), also called normal hydrogen electrode (NHE). To do
this, select the value in Table 1
that corresponds to the temperature of the solution
measured. Substitute that value Eref into the equation and solve for Eh:
Eh = E + E
ref
where:
Eh = oxidation reduction potential of the sample relative to the SHE
E = potential developed by the ORP/Redox electrode
E
= potential developed by the reference electrode portion relative to the SHE
ref
(Table 1).
Table 1 shows the potentials, E
, developed by the reference electrode portion relative
ref
to the SHE at various temperatures.
Table 1 Standard potential of reference electrode
)
ref
80 163.1
75 167.7
5
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