Myron L 750 II Series User Manual

59
4. TRANSFER STANDARD METHOD
For maximum accuracy of any Monitor/controller, the transfer
standard method should be utilized. Instead of removing the
entire Monitor/controller and sensor, and either returning it to
the manufacture or sending it to a third party laboratory for
recertication,thetransferstandardallowsquickrecertication
and return to service — less down time. While being the most
accurate method it is also very easy to perform, and may be
used to calibrate ANY manufacture Monitor/controller —
resistivityorconductivity/TDS.Thismethodstillhasthebenet
ofthirdpartyverication,ifsodesired.
1. A high quality hand-held instrument, one capable of
accurate conductivity/TDS and/or “resistivity” readings
such as the Myron L Ultrameter II™, is calibrated using a
standard solution, or if so desired, sent to a third party
  laboratoryforcalibration&certication.Preferablythe
standard solution should be as close as practicable
to the area of the Monitor/controller operation, i.e. for
a conductivity Monitor/controller that is operating
between 1500 and 2000µS, the recommended Myron L
standard solution is KCl-1800.
NOTE: For resistivity values, the Myron L
®
Company can supply
NaClstandardsaslowas~25µSonspecialorder.Extremelylow
values are available from other sources. Calibrated at 25µS the
Ultrameter II is capable of very accurate resistivity measurements.
2. Once the Ultrameter II is calibrated, the process water
is measured. (For resistivity measurements, follow the
recommended procedure described in the Ultrameter II
  OperationManual,sectionIV.B,MeasuringResistivity.)
3. Finally, the Monitor/controller is calibrated/adjusted to
match the value measured by the Ultrameter II by
adjusting the Main CALibration control shown in
  gureV.A.1.
4. Turn power OFF.
5. Re-install front panel as described below in
“REASSEMBLY”.
REASSEMBLY
 1. Carefullyreinstallthefrontpanel,bottomrst.
Ensure no wires have been pinched between
enclosure and front panel.
2. Reinstall the four (4) screws and tighten.
3. To operate, turn power ON.
D. PREVENTIVE CARE
The Myron L
®
Company recommends that the following
Preventive Care procedures be observed.
1. Try to prevent exposure to excessive heat and moisture.
 2. TheMonitor’smainACpowersourceshouldbeprotected
against excessive voltage “spikes.”
3. Take care not to damage the Monitor during handling.
NOTE: Daily, weekly or monthly maintenance schedules are
based upon the frequency of use and the severity of the
Monitor’senvironmentandoperatingconditions.
 4. RepeattheMonitor’sCheck-Outprocedurestoverify
satisfactory operation and/or isolate possible
troubleshooting symptoms.
5. Check all cable connections to ensure that they are
free of moisture and contamination.
6. Inspect and replace damaged component boards and
cable assemblies.
7. Periodically remove, clean and inspect the Sensor.
CLEANING - clean front panel with soap and water, and
soft non-abrasive cloth.

Myron L 750 II Series Specifications

General

Brand	Myron L
Model	750 II Series
Category	Controller
Language	English