Hach Polymetron Series User Manual

the sensor errors, press the MENU key and select Sensor Diag, [Select
Sensor], Error List. A list of possible errors is shown in Table 6.
Table 6 Error list for conductivity sensors
Error Description Resolution
MEAS TOO
HIGH
The measured value is >
2,000,000 µS/cm,
1,000,000 ppm or
20,000 ppt
Make sure that the sensor is
configured for the correct cell
constant.
MEAS TOO
LOW
The measured value is <
0 µS/cm, 0 ppm or 0 ppt
Make sure that the sensor is
configured for the correct cell
constant.
ZERO TOO
HIGH
The zero calibration value is
> 500,000 counts
Make sure that the sensor is held
in air during zero calibration and is
not located near radio frequency or
electromagnetic interference.
Make sure that the cable is
shielded by metal conduit.
ZERO TOO
LOW
The zero calibration value is
< –500,000 counts
TEMP TOO
HIGH
The measured temperature
is > 130 °C
Make sure that the sensor is
configured for the correct
temperature element. Refer to
Test the conductivity sensor
on page 16.
TEMP TOO
LOW
The measured temperature
is < –10 °C
ADC
FAILURE
The analog to digital
conversion failed
Make sure that the sensor module
is fully inserted into the controller
connector. Replace the sensor
module.
Table 6 Error list for conductivity sensors (continued)
Error Description Resolution
SENSOR
MISSING
The sensor is missing or
disconnected
Examine the wiring and
connections for the sensor and for
the module. Make sure that the
terminal block is fully inserted into
the module.
SENS OUT
RANGE
The sensor signal is outside
of the accepted limits for
the cell constant that is
used (0.01 and 0.05:
100 µS/cm; 0.5:
1000 µS/cm; 1:
2000 µS/cm; 5:
10,000 µS/cm; 10:
200,000 µS/cm)
Make sure that the sensor is
configured for the correct cell
constant.
Warning list for sensors
A warning does not affect the operation of menus, relays and outputs. A
warning icon flashes and a message is shown on the bottom of the
measurement screen. To show the sensor warnings, press the MENU
key and select Sensor Diag, [Select Sensor], Warning List. A list of
possible warnings is shown in Table 7.
Table 7 Warning list for conductivity sensors
Warning Description Resolution
ZERO TOO HIGH The zero calibration value
is >300,000 counts
Make sure that the sensor is
held in air during zero
calibration and is not located
near radio frequency or
electromagnetic interference.
Make sure that the cable is
shielded by metal conduit.
ZERO TOO LOW The zero calibration value
is < –300,000 counts
TEMP TOO HIGH The measured temperature
is > 100 °C
Make sure that the sensor is
configured for the correct
temperature element.
TEMP TOO LOW The measured temperature
is < 0 °C
English 17

Hach Polymetron Series Specifications

General

Brand	Hach
Model	Polymetron Series
Category	Accessories
Language	English