Thermo Fisher Scientific CyberScan pH 1000/pH 2500 - Manual (Page 19)

Instruction Manual pH 1000/ 2500
14
7 MEASUREMENT: READY, CONTINUOUS
AND HOLD
7.1
Measurement in the READY Mode
The READY annunciator appears the readings are stable at
the top left corner of the LCD. The reading is held as long as
the variation of readings is within a range. (For pH, tolerance
is +/- 0.02 pH. For mV, tolerance is +/- 0.3 mV < 400 mV and
+/- 1.2 mV > 400 mV).
1. Rinse the pH electrode using de-ionized or distilled water prior to
use. This will remove impurities that have adhered on the
electrode body.
2. Switch to the MEAS mode for measurement. The MEAS mode is
activated whenever the meter is switched on. If you are in the
calibration mode, press CAL/MEAS key to revert to the
measurement mode.
3. Dip the electrode into the sample ensuring that the glass bulb of
the electrode is completely immersed into the sample. Swirl
electrode gently in the sample. When reading stabilizes, the
READY annunciator displays.
NOTE:
If the READY indicator is turned off, the readings are
instantaneous readings. Allow readings to stabilize
before reading for highest accuracy.
7.2
Measuring in the Continuous Mode
As the READY function provides stable readings, the
continuous mode provides instantaneous readings for faster
operation. Continuous mode readings, however, may not be
as stable. To turn off READY, see page 22. Follow steps (1)
to (3) of READY mode measurements.
7.3 HOLD
Function
This feature allows you to hold the value of the measurement
reading until it is more convenient to note the reading. This
mode can be activated at any time when you are in the MEAS
mode. You can store the held value into memory if HOLD is
active.
7.3.1
Holding and Releasing a Measured Value
In the measurement mode, press HOLD key to hold a
displayed value. When HOLD mode is activated, the HOLD
mode annunciator displays.
To release a held value, press HOLD key again. The HOLD
mode annunciator disappears from the LCD and the meter
reverts to its measurement mode.