H. Recall and Erase Data
1.
In “Measure Mode”, press “SCROLL” key 3 seconds, the most recent set of saved data
will appear.
2.
Press the “SCROLL” key to view previous saved data.
3.
Press and hold the “CAL” key for 2 seconds to erase all saved data and return to
“Measure Mode”.
OR
4.
Press “STORE” key for 2 seconds to return to “Measure Mode” without erasing data.
ONGOING MAINTENANCE
A. Electrode Storage
1.
Electrodes attached to the instrument should be kept in a moist environment. Keep the
sponge in the chamber moist, tap water is acceptable. The single-junction electrode
needs to be kept clean; check periodically for cleanliness.
2.
For long-term storage, store in pH 4 buffer.
B. Battery Disposal
This instrument is powered by alkaline batteries, which the user must remove and dispose of
when the batteries no longer power the instrument. Disposal requirements vary by country and
region, and users are expected to understand and follow the battery disposal requirements for
their specific locale.
The circuit board in this instrument may contain a manganese dioxide lithium "coin cell" battery
that must be in place for continuity of power to memory devices on the board. This battery is not
user serviceable or replaceable. When appropriate, an authorized YSI service center will
remove this battery and properly dispose of it, per service and repair policies.
ERROR DISPLAYS AND TROUBLESHOOTING
pH LCD
Display
ATC
Display
DISPLAY
Mode
Possible cause(s)
[Action(s)]
Any Value
"OVER"
Measure
a. Temperature outside 0 to 100.0°C range.
[Bring solution to a lower/higher temp.]
b. Bad sensor. [Replace electrode.]
"OVER"
0.0-
100.0°C
Measure
pH value outside 0.00 to14.00 pH range .
[Use new buffer, Recalibrate, or Replace electrode.]
"OVER"
0.0 -
60.0°C
pH CAL
a.pH-
STAND
b.pH-
SLOPE
a. Offset @ 7.00pH: mV > 90mV
Offset @ 6.86pH: mV > 98.3mV
b. New slope>ideal slope by 30%
[Use new buffer or Replace electrode.]
"OVER"
“UNDER”
0.0 -
60.0°C
pH CAL
a.pH-
STAND
b.pH-
SLOPE
a. Offset @ 7.00pH: mV < -90mV
Offset @ 6.86pH: mV < -81.7 mV
b. New Slope < ideal slope by 30%
[Use new buffer or Replace electrode.]
SPECIFICATIONS
Range Resolution
Accuracy
pH 0.00 to 14.00 pH
pH 0.01 pH
pH ±0.02 pH ± 1 LSD
Temp. 0.0 to 100.0 °C
Temp. 0.1 °C
Temp. ±0.3 °C
Temp. 32.0 to 212 °F
Temp. 0.2 °F
Temp. ±0.6 °F
