YSI pH1200 - Manual (Page 4)

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G E T T I N G S T A R T E D
DISPLAY
1. HOLD
This will indicate that the
reading is frozen during
AUTOLOCK mode. 8. C °/F°
Temperature units.
2. WAIT
This will be displayed when
the unit is still waiting
for a stable reading. 9. AUTO
AUTOLOCK mode indicator.
(If the difference between a
reading at the first second
and tenth second is less
than 0.01 pH or 0.2 mV
then the instrument will
“lock” the tenth reading).
3. LOBAT
Low battery indicator. pH1200
uses 4 C-cell alkaline batteries.
The battery compartment is on
the bottom of the instrument
and can be accessed by
sliding the cover according to
the direction of the arrows. 10. mV
Measurement unit and
mode indicators.
4. MAN
Displayed if a temperature
probe is not connected. 11. pH
Measurement unit and
mode indicators.
5. ATC
ATC (Automatic Temperature
Compensation) indicator will
be displayed if a temperature
probe is connected. 12. EFF. / %
This will be displayed if the user
is viewing the efficiency of the
electrode. It is recommended to
use a new electrode when the
efficiency value is less than 75%.
6. CAL
This will be displayed
when the instrument enters
the calibration mode. 13. Buffer selection
This indicator will flash if the
unit is not yet calibrated. This
indicator will remain lit-up if
the unit has been calibrated.
7. SECONDARY DISPLAY
For temperature in
C
° or F° display.
KEYS
Key Description
On/Off
Press and hold this key for 5 seconds to power
on or turn off the instrument. Once the unit is
powered up, press the same key to turn on or off
the backlight.
Mode
Selects display mode. Pressing this key changes
the display sequentially to display pH-AUTO,
mV-AUTO, pH and mV. The calibration values will
not be affected by changing the display modes.
During pH calibration, press Mode key to exit
calibration mode.