Myron L D-6 - Manual (Page 17)

4. Press .
5. Take reading.
NOTE: When ppm free chlorine units are selected (ref. VIII. ORP UNIT
SELECTION), annunciators alert you when the concentration is outside
the specified measurement range. “Or” (over range) will display when
the concentration is over the range limit (> 9.9 ppm). “ur” (under range)
will display when the concentration is below the range limit (< 0.2 ppm).
WArNING: When using a D-6 to verify the complete removal of residual
oxidizing germicides, such as chlorine, ORP mV reading should be
as low as possible. Generally, an ORP reading of < 275 mV is a good
indicator that there is very little residual oxidizer remaining. However,
it is recommended that a target reading matching or close to the ORP
value measured at the output of your RO system be sought.
6. IMPOrTANT: After use, fill pH/ORP sensor well with Myron L pH
Sensor Storage Solution and replace protective cap. If Myron L
pH Sensor Storage Solution is unavailable, you can use a strong
KCl solution (preferred), a saturated solution of NaCl table salt and
tap water (next best alternative), or a pH 4 buffer (least desirable
alternative). NEVEr use distilled water or plain tap water as this
will quickly deplete the sensor (ref. Cleaning Sensors, 3. pH/ORP,
pg. 35). Do not allow pH/ORP sensor to dry out.
VIII. OrP uNIT SELECTION (D-6) mV Or PPM FrEE CHLOrINE
1. Press .
2. Press and hold
for approximately 3 seconds.
The current preference for
ORP units of measure is
displayed. Factory setting for
this preference is mV (see
Figure 1).
4. Press the or keys
to toggle between mV
and ppm free chlorine
measurement format. The
setting chosen is displayed.
(ppm shown as example in
Figure 2).
mV
Figure 1
14
PPM
Figure 2