Hach pHD Manual Básico Del Usuario página 21

Error
pH value is too low!
ORP value is too low!
Offset value is too high.
Offset value is too low.
Slope is too high.
Slope is too low.
Temperature is too high!
Temperature is too low!
The difference between the
buffers is too small!
Sensor is missing.
Temperature sensor is
missing!
Glass impedance is too low. The glass bulb is broken or reached
7.6 Warning list
A warning does not affect the operation of menus, relays and outputs. The screen changes to an
amber color. The diagnostics bar shows the warning. Push on the diagnostic bar to show the errors
and warnings. As an alternative, push the main menu icon, then select Notifications > Warnings.
A list of possible warnings is shown in
Warning
pH is too high.
ORP value is too high.
pH is too low.
ORP value is too low.
Offset value is too high.
Offset value is too low.
Slope is too high.
Slope is too low.
Table 5 Error list (continued)
Description
The measured pH is < 0.
The measured ORP value is
< –2100 mV.
The offset is > 9 (pH) or 200 mV
(ORP).
The offset is < 5 (pH) or –200 mV
(ORP).
The slope is > 62 (pH)/1.3 (ORP).
The slope is < 50 (pH)/0.7 (ORP).
The measured temperature is
>130 °C.
The measured temperature is
< –10 °C.
The buffers for 2-point auto correction
have the same value.
The sensor is missing or
disconnected.
The temperature sensor is missing.
end of life.
Table 6.
Table 6 Warning list
Description
The measured pH is > 13.
The measured ORP value is > 2100 mV.
The measured pH is < 1.
The measured ORP value is
< –2100 mV.
The offset is > 8 (pH) or 200 mV (ORP).
The offset is < 6 (pH) or –200 mV (ORP).
The slope is > 60 (pH)/1.3 (ORP).
The slope is < 54 (pH)/0.7 (ORP).
Resolution
Calibrate or replace the sensor.
Follow the maintenance procedures for
the sensor and then repeat the
calibration, or replace the sensor.
Repeat the calibration with a fresh buffer
or sample, or replace the sensor.
Clean the sensor, then repeat the
calibration, or replace the sensor.
Make sure that the correct temperature
element is selected.
Complete the steps in Test the pH sensor
on page 19.
Examine the wiring and connections for
the sensor and for the module (or digital
gateway).
Examine the wiring for the temperature
sensor. Make sure that the correct
temperature element is selected.
Replace the sensor. Contact technical
support.
Resolution
Calibrate or replace the sensor.
Calibrate or replace the sensor.
Follow the maintenance procedures for
the sensor and then repeat the
calibration.
Repeat the calibration with a fresh buffer
or sample.
Clean the sensor, then repeat the
calibration.
English 21