Nova-Tech pH-Dissolved Oxygen Meter - Manual (Page 10)

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Notes on mg/l (ppm) mode calibration
During mg/l (ppm) calibration, the meter adjusts to
the barometric pressure value that is programmed into
the meter. It also adjusts to the salinity value that is
programmed into the meter.
You can change the barometric pressure value and
salinity value in the mg/l (ppm) SETUP mode (see
pages 47-48 for directions).
Whenever an error occurs during calibration, the ERR
indicator appears in the lower left hand corner of the
display.
Temperature Calibration
The built-in temperature sensor included in the DO probe is factory calibrated.
Calibrate your sensor only if you suspect sensor drift that may have occurred
over a long period of time or if you have a replacement DO probe. Make sure DO
probe is attached before you perform the temperature calibration.
1. Switch the meter on. Press MODE to
select either pH or mg/l (ppm)
Measurement mode.
2. Press the CAL/MEAS key to enter
pH or mg/l (ppm) calibration mode.
The CAL indicator will appear above the
primary display.
See figure
3. While in pH or mg/l (ppm) calibration
mode, press the MODE key to enter
temperature calibration mode.
The primary display shows the last set
temperature reading and the secondary
display shows you the factory default
temperature value.
See figure
4. Compare the primary display reading
to a NIST-traceable thermometer or
another thermometer known to be
accurate.
5. Press the ▲ or ▼ keys to adjust
the primary display reading to agree
with your temperature standard.
See figure
6. Press the ENTER key to confirm
temperature calibration and return to
Measurement mode.
Notes
To exit from Temperature Calibration mode
without confirming calibration, DO NOT
press ENTER in step 6. Press CAL/MEAS
instead.
Temperature calibration is restricted to
±5°C from the factory default value
displayed during calibration (shown in the
secondary display).
ATC
READY
CAL
C
mg/l
ATC
READY
CAL
C
ATC
READY
CAL
C
A
B
C
4.7
A
B
C
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