Thermo Fisher Scientific CyberScan DO 300 - Manual (Page 6)

Instruction Manual DO 300
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2.2 Keypad
The large membrane keypad makes the instrument easy to use. Each button, when pressed,
has a corresponding graphic indicator on the LCD. See Figure 1. Some buttons have several
functions depending on its mode of operation.
Key Function
ON/OFF Powers meter on and off. The meter powers on in the mode that you were last using.
For example, if you shut the meter off in mg/L measurement mode, the meter will be in
mg/L measurement mode when switched on. Note: The meter shuts off automatically
after 20 minutes of the last key press.
HOLD Freezes the measured reading. To activate, press HOLD while in measurement mode.
To release, press HOLD again.
NOTE: When auto endpoint feature is switched on, it automatically holds reading after 5
seconds of stability. The HOLD indicator appears on the display. Press HOLD to
release auto endpoint feature.
MODE 1. Selects the measurement parameter. Press MODE to toggle between DO %
saturation; DO mg/L (or ppm) and date/time.
2. While in CAL mode under mg/L (or ppm) measurement status, this key will toggle
between mg/L (or ppm) calibration and temperature calibration (refer to section 4.2)
CAL/MEAS Toggles between Calibration and Measurement mode.
1. In DO % saturation measurement mode, press CAL/MEAS to enter DO %
saturation calibration mode.
2. In DO mg/L (or ppm) measurement mode, press CAL/MEAS to enter DO mg/L (or
ppm) calibration mode.
3. To abort calibration, press CAL/MEAS key again to go back to measurement
mode.
While in advanced SETUP mode: Press CAL/MEAS to return to main group menu from
sub group menus. Press CAL/MEAS again to return to measurement mode from main
menu.
ENTER 1. Press to confirm your calibration values in calibration mode.
2. While in SETUP mode, pressing the ENTER key confirms the main group menu
selection and takes you through each sub group menu.
MI/ &
MR/
In Measurement mode:
Press MI key to store the mg/L (ppm) or % Saturation values with its corresponding
temperature and date/time values, into the memory.
Press MR to retrieve data from memory in LIFO method.
In Calibration & Set up mode:
In DO mg/L (or ppm) and temperature calibration mode, press or keys to
increase or decrease the calibration values.
In SETUP mode, press or keys to scroll through the SETUP main group menu
and to set the parameters in the sub group menu.
SETUP Takes you into the SETUP mode. This mode lets you customise meter preference and
defaults, view calibration and electrode data.
LIGHT : Press to light up the backlit display.