Thermo Fisher Scientific CyberScan pH 1000/pH 2500 - Manual (Page 21)

Instruction Manual pH 1000/ 2500
16
MODE HOLD
7.6
Measuring Relative mV
1. If you are not in Relative mV measuring mode, press MODE key until
the mode annunciator at the bottom of the LCD shows that the meter
is in the Relative mV mode.
2. To measure in READY mode, follow steps (2) to (3) of the steps in
“Measuring in the READY Mode”.
3. The primary display shows the corrected Relative mV reading and the
secondary field shows the temperature. The resolution will be 0.1 mV
within the +/-399.9 mV range and +/-1 mV beyond. Beyond the
operation range of the meter, it shows “Ur” and “Or” in the primary
display to denote under range and over range respectively.
4. The displayed value is actually the result of subtracting the base mV
value (Set by yourself; see Calibrating Relative mV in Section 6.5)
from the absolute mV reading. The default setting of this base value is
0 mV.
To recall the base value set, press SHIFT followed by Rel mV key.
7.7
Measuring Ion (for pH 2500 only)
If you are not in the Ion measurement mode, press MODE key
until the mode annunciator at the bottom of the LCD shows that
the meter is in the Ion mode.
To measure in READY mode, follow steps (2) to (3) of the steps in
“Measuring in the READY Mode”. The primary display will show
the Ion reading and the secondary field will show “Ion”.
While measuring between samples, remember to rinse the
electrode with deionized water before proceeding to the next
sample, to avoid cross-contamination if any.