8
Connecting the AC Adapter (35630-00 only)
The AC adapter is not included with your meter; order separately on page 22.
1.
Insert the AC jack as shown in figure below.
2.
Switch off the meter before plugging the adapter into the power source.
This safety precaution protects the software in your meter.
3.
Press the ON/OFF button to switch meter on.
pH/Conductivity/
°
C Meter
3.3
To completely recalibrate your meter, or when you use a replacement probe, it is
best to set the meter to its factory defaults and recalibrate the meter at all points. To
reset pH, make sure meter is in pH mode. To reset conductivity, make sure meter is
in conductivity mode. To reset the meter to its factory defaults in either mode:
1.
While in Measurement mode, press
CAL/MEAS and hold for 3 seconds.
2.
The meter will prompt RST in the upper
display and CAL in the lower display.
See figure
3.
Press ENTER to reset your meter to its
factory defaults. The screen will flash all
characters, then returns to measurement
mode once the meter is reset. If you do not
want to erase existing calibration data,
press CAL/MEAS to escape this mode.
9
For information on how to calibrate your meter:
• See section 4.3 on pages 10-11 for pH calibration
• See section 4.4 on pages 12-13 for conductivity calibration
• See section 4.5 on pages 14-15 for temperature calibration
Preparing the Meter for Calibration
The pH/conductivity/temperature probe included with this meter is designed for
use with this meter only. Do not substitute other types of probes or electrodes. For a
replacement probe, see the “Accessories” section, page 22.
Before starting calibration, make sure you are in the correct measurement mode.
When you switch on the meter, the meter starts up in the units you shut it off in
(either pH or Conductivity). For example, if you shut the meter off in "mS" units, the
meter will read "mS" units when you switch the meter on.
Be sure to remove the protective rubber cap of the probe before calibration or
measurement.
Wet the probe in tap water for 10 minutes before calibrating or taking
readings to saturate the pH electrode surface and minimize drift.
Wash your probe in deionized water after use, and store in pH 4.0 or 7.0 electrode
storage solution.
Do not reuse buffer solutions after calibration. Contaminants in the solution can
affect the calibration, and eventually the accuracy of the measurements.
4.2
4. Calibration
Important Information on Meter Calibration
When you recalibrate your meter, old pH and conductivity calibration data are replaced
on a point by point basis. For example, if you previously calibrated your meter at pH 4.0,
7.0, and 10.0, and you recalibrate at pH 7.0, the meter retains the old calibration data at pH
4.0 and pH 10.0.
4.1
A
A
