H. Erase Data
1.
Press “SCROLL” key 10 seconds to enter erase mode.
2.
Press “STORE” key to erase
all
saved data. “Data Clear” will appear at the top and
the ORP15A will return automatically to “Measure Mode”.
3.
Press “SCROLL” key to escape to “Measure Mode” without clearing 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
ORP LCD
Display
ATC
Display
DISPLAY
Mode
Possible cause(s)
[Action(s)]
Any Value
"OVER"
or
“UNDR”
Measure
a. Temperature outside -10 to 100.0°C range.
[Bring solution to a lower/higher temp.]
b. Bad sensor. [Replace electrode.]
"OVER" or
“UNDR”
-10 to
100.0°C
Measure
ORP value outside -1100 to +1100 ORP range .
[Recalibrate, Clean or Replace electrode.]
SPECIFICATIONS
Range Resolution
Accuracy
ORP -1100 to +1100 mV
1 mV
1 mV ± 1 LSD
Temp. -10.0 to 100.0 °C
Temp. 0.1 °C
Temp. ±0.3 °C
Temp. 14.0 to 212 °F
Temp. 0.2 °F
Temp. ±0.6 °F
ORP
Offset Range
User programmable from -999 to 999 mV
Input impedance
>10
12
Ω
Temperature
Temperature sensor
Thermistor, 10 k
Ω
at 25°C
General
