1
DOC272.53.80033
User instructions
Gel filled ORP/Redox electrode: 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, if noted on the instrument, will be included
with a danger or caution statement in the manual.
Overview
The MTC101 series is a non-refillable, gel-filled combination oxidation reduction potential
(ORP/Redox) electrode with a built in temperature sensor. The MTC10101 or MTC10103
electrode is available with a 1 or 3 meter cable and is intended for laboratory use. The
MTC10105, MTC10110, MTC101 15 or MTC1013 0 electrode is ava ilable with a 5, 10, 15 or 30
meter cable and is intended for field use. The electrode gives direct measurements of absolute
mV values in wastewater, drinking water and general applications.
Specifications
Specifications are subject to change without notice.
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.
This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential injury. If on the
instrument, refer to the instruction manual for operation or safety information.
Specification Details
Electrode 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 ºC (± 0.54 ºF)
Operating temperature range 0 to 80 °C
Storage temperature range 5 to 40 °C
Junction Open junction
Reference potential versus
Standard Hydrogen Electrode
207 mV at 25 ºC
Reference type Ag/AgCl (3M KCl)
Minimum sample depth 20 mm
Dimensions
Standard: Diameter: 12 mm (0.47 in.), Length: 103 mm(4.056 in.), Total length: 200 mm
(7.9 in.), Cable length: 1 or 3 meter (3.3 or 9.8 ft). Rugged: Diameter 12 mm (0.47 in.),
Length: 20 mm (0.78 in.), Total length: 220 mm (8.7 in.), Cable length: 5, 10, 15 or 30
meter (16.4, 32.8, 49.2, or 98.4 ft).
Cable connection Digital output and connector compatible with HQd meters
Warranty Sensor is covered by a 6 month warranty.
2 DOC272.53.80033
Preparation for use
1. Remove the locking ring and shroud (rugged model).
2. Before first use, remove the tape from the reference junctions and the label from the
electrode body. Refer to Figure 1.
3. Rinse the reference junctions and platinum electrode with deionized water and blot
dry with a lint-free cloth.
4. If the electrode will not be used immediately, fill the storage cap halfway with Hach
Electrode Storage Solution or 3M KCl and install the cap.
5. Install the shroud and locking ring and hand-tighten (rugged mo del).
Figure 1 Probe overview
1 Shroud (rugged model) 5 Rugged probe (5, 10, 15 or 30 meter cable)
2 Electrode storage cap 6 Standard probe (1 or 3 meter cable)
3 Platinum electrode and temperature sensor 7 Electrode storage cap lid
4 Reference junctions and tape 8 Locking ring (rugged model)
DOC272.53.80033 3
Calibration
Calibration notes
• Probes are initially calibrated at the factory. However, re gular calibration by the user is
recommended for best measurement accuracy.
• Additional standards can be selected in the MTC101 Calibration Options.
• ZoBell’s redox potential is temperature dependent. The HQd calibration routine
factors in this temperature dependency allowing accurate calibrations withi n the
temperature range of 0 - 30 ºC. Light’s solution should be read @ 25 ºC. Custom
ORP/Redox calibration solution values and temperature are user defined.
• The calibration is recorded in the electrode and the data log. The calibration is also
sent to a PC, printer or flash memory stick if connected.
Before calibration:
The probe must have the correct service-life time stamp. Set the date and time in the meter before attaching the probe.
It is not necessary to recalibrate when moving a probe from one HQd meter to another if the additional meter is configured to
use the same calibration options. If the additional HQd meter uses different calibration options (e.g. standard calibration
routine), calibrate the probe or change the method settings/select a different method.
To view the current calibration, select DATA LOG KEY, View Probe Data, then View Current Calibration.
If two probes are connected, push the UP or DOWN arrow to change to the single display mode to show the Calibrate
option.
ORP/Redox standards should not be diluted. Always use fresh ORP/Redox standard for calibration.
Stir gently. Avoid resting the electrode on the bottom or sides of the container.
Refer to the troubleshooting section for calibration errors (Troubleshootin g on page 13).
4 DOC272.53.80033
Note: Procedures also apply for rugged model probes.
1. Connect the
electrode to the
meter.
2. Add fresh
ORP/Redox
standard to beaker
or appropriate
container.
3. Select
Calibrate. The
display will show the
required
ORP/Redox
standard solution.
4. Rinse the
electrode with
deionized water , blot
dry and place it in
the standard
solution. Make sure
that the sample
level is above the
reference junction.
5. Push Read. Stir
gently. The display
will show
Stabilizing... and a
progress bar as the
probe stabilizes in
the standard.
6. The display will
show the standard
solution value and
the mV offset when
the reading is
stable. Select Done
to view the
calibration
summary.
7. The display will
show the calibration
summary. Select
Store to accept the
calibration and
return to the
measurement
mode.
DOC272.53.80033 5
Run check standard
The run check standard feature validates instrument performance between sample
measurements. Use the run check standard feature for periodic or user-defined interval
measurement of a traceable standard solution. Set the criteria for check standards from
the MTC101 settings menu.
Note: Access control must be off or a valid password entered before any of the check standard
method options can be changed.
1. Select Run Check Standard from the Meter Options menu.
Note: Select the appropriate probe if two probes are connected to the meter.
2. Obtain the standard solution specified in the display.
3. Place the electrode in the standard solution and select
READ. The display will show
Stabilizing... and a progress bar as the electrode stabilizes in the standard. The
display shows the value of the check standard and either Chec k Standard Passed or
probe Check Standard Failed.
If the display reads Check Standard Passed, the check standard measurement is
within the accepted limits defined by the administrative user. Select
DONE to proceed
with sample measurement.
If the display reads Check Standard Failed, the measurement is o utside of accepted
limits defined by the administrative user and a recalibration is suggested. If the
acceptance criteria is set to Cal Expires on Failure: Yes, the display will show the
calibrate icon with a question mark until the electrode is recalibrated. Recalibrate the
electrode to correct the status indicator (Calibration on page 3).
Measurement
Measurement notes
• Data is stored automatically in the data log when
PRESS TO READ or INTERVAL is
selected in the Setup Measurement Mode.
• To significantly reduce the response time for reducing-type samples:
• The platinum disc must be clean and smooth.
• Immerse the platinum disc for 3-10 minutes in Reducing Solution for ORP
Electrodes prior to sample analysis.
• Rinse the electrode with sample, then measure.
Before measurement:
The electrode must have the correct service-life time stamp. Set the date and time in the meter before attaching the
probe.
The probe is factory calibrated and ready for use. For applications that require greater accuracy and precision, verify the
user calibration with check standards or perform a user calibration. Routine calibrations are req uired (Calibration on page 3).
Make sure that the platinum electrode is clean before sample measurement (Clean the probe on page 9).
If complete traceability is required, enter a sample ID and operator ID before measurement.
Refer to the troubleshooting section for measurement errors (Troubleshooting on page 13).
Stir samples gently during measurement.
When deploying the rugged probe at a distance, toss the cell body with a gentle underhand throw. Swinging the probe by the
cable 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 may not be covered by the product warranty.
Loading...