Thermo Fisher Scientific CyberScan DO 300 - Manual (Page 12)

Instruction Manual DO 300
9
To calibrate 0% Saturation:
1. Rinse the probe well with DI rinse water. For best
accuracy, wipe the end of the probe dry. Do not touch the
membrane.
2. Press the MODE key to select the % saturation mode.
3. Place the probe in zero oxygen solution. Stir the solution
gently using the probe to homogenize the sample. Make
sure that the sample is continuously flowing past the
membrane sensor.
4. Press the CAL key. The CAL indicator will appear above
the primary display. The primary display will show the
factory default % saturation measurement and the
secondary display will show 0.0.
5. Wait for the reading to stabilise. If the READY indicator
feature is enabled, it will appear when the reading is
stable. (See section 8.7.1 on page 29 for Ready indicator
setup).
6. Press the ENTER key. The meter automatically calibrates
to 0.0% saturation and returns to Measurement mode.
See figure on right.
NOTE
The factory default % saturation measurement in step 4 must read at 10% or under for the
calibration to work correctly. Whenever an error occurs during calibration, the ERR indicator
appears in the lower left hand corner of the display.
Figure 7: To calibrate for
0.0% saturation
MEAS
%
%
%
ATC
°C
ATC
°C
8.5
23.4
CAL
MEAS
READY
23.4
ENT
ER
CA L
ME AS
READY