Thermo Fisher Scientific CyberScan DO 110 - Manual (Page 14)

Instruction Manual CyberScan DO 110
9
4.2 Temperature Calibration
DO in mg/L is dependent on temperature, so it is first
necessary to calibrate or verify the temperature reading. The
temperature sensor is part of the DO probe and the “ATC”
annunciator will light up on the LCD screen once the probe is
connected correctly to the meter.
1. Switch the meter on. The ATC annunciator will appear at
the right-hand side of the LCD.
2. Press the CAL/MEAS key to enter calibration mode.
3. While in calibration mode, press the MODE key to enter
temperature calibration mode. The primary display
shows the measured temperature reading according to
the last set offset
1 and the secondary display shows the
factory calibrated temperature measurement.
4. Dip the DO probe into a solution of known temperature
(i.e. a temperature bath). Allow time for the temperature
probe to stabilise.
5. Scroll with the MI/▲ or MR/▼ keys to set the correct
temperature value (i.e. the temperature of the
temperature bath). You can adjust the reading in
increments of 0.1°C.
6. Once you have selected the correct temperature, press
the HOLD/ENTER key. The meter automatically returns
to the measurement mode.
NOTES: You can offset the temperature reading up to ±5°C
from original reading.
To exit this program without confirming the temperature
calibration value, DO NOT press ENTER. Press CAL/MEAS
instead.
1 It displays the value being measured currently, offset by the last calibration.
MEAS
%
%
ATC
°C
98.9
22.3
MEAS
%
ATC
°C 22.0
CAL
83.4
100.0
CAL
ATC
°C
22.3
22.3
ATC
°C
22.0
22.3
CAL
READY
MEAS
CAL
MODE
MI MR
ENTER
HOLD
98.9