Verifying Ec Calibration; Errors During Calibration - palintest Macro 900 Operation Manual

Macro 900 Operation Manual
The Calibration Report on the top line displays the EC Cell Constant. This value
is not stored in memory so should be noted down in a calibration record book
for the probe.
When the cell constant details have been noted down, press OK then ESC
repeatedly to return to normal reading mode.
Special Notes:
If you have selected a Calibration Standard value other than 2570
(MacroCal), then you subsequently use the MacroCal calibration
technique described in section 10, the Calibration Standard value
will automatically be reset to 2570.
The Calibration Standard value is stored in the Probe, not the
Meter. If you use one Meter with several different Probes, you will
have to set the Calibration Standard value for each probe
individually during calibration.
If you select a Calibration Standard value but do not press OK, the
information will not be sent to the Probe and the change will not be
registered.

14.9. Verifying EC Calibration

Due to the fact that debris and air bubbles can adversely affect EC calibration,
it is advisable to verify calibration has been properly achieved. To do this,
follow item nine above with this procedure.
1. Remove the probe from the calibration bottle, shake it off, then
reinsert.
2. Press the ESC key repeatedly to get back to the Main Menu.
3. Go into settings and make sure EC is set to read with reference to
25ºC. If it's
source not
4. Go back to the main screen, wait until the temperature and EC
readings are
of the Calibration Standard
5. If the EC reading is outside the 1% limit, recalibrate, this time
leaving more
If you cannot successfully verify the EC calibration after several attempts,
replace the Calibration Standard. If the problem persists, strip the probe down
as described below and thoroughly clean the EC contacts.
14.10.

Errors During Calibration

At the beginning of the calibration routine, a sanity check is done. If the probe
detects that the Calibration Standard value set and the Calibration Standard
being used differ, the 'OUT OF CAL RANGE' error will be reported. If any other
problems occur during calibration, an error message will be displayed. Refer to
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handling.
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not, set it that way. See section 9
found..
stable, then check that the EC is reading +/- 1%
time for stabilisation.
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value.
in section 10 for error message
V3
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