Diagnostics Messages - Hach ORBISPHERE 3654 Manuel D'utilisation De Base

identify an instrument problem with a Hach Lange service representative either on-site or over the
phone.
When performing this test, if the system is over-range, you may receive a message that states, for
example, The current input is saturated. Similar messages will also appear, to warn when
temperature and pressure limits are exceeded.
The voltage limits for normal operation are:
• Current channel: +0.1 V and +4 V, depending on the gas being measured
• Temperature channel: +10 mV to +4 V
• Pressure channel: -100 mV to +100 mV
The POINT window on the right side of the gas channel voltage, is a parameter useful for
troubleshooting by Hach Lange support technicians. It cannot be set or updated locally.
9.1.6 Measurements view
The Troubleshooting, Measurements View confirms, on your PC monitor, what your instrument
should be displaying on the LCD for gas concentration and sample temperature. Choose Cancel to
exit from this display.
9.2 Troubleshooting - Operation
9.2.1 Program identification
In case of problems, it may be necessary to check the current version of your software as this may
be required by Hach Lange if you need to contact them for assistance in problem solving.
To identify the version of the software in your instrument, switch off the instrument. Then hold down
the MEAS button while switching the instrument back on. The instrument will then briefly display the
software version number before going through it's start-up procedures.

9.2.2 Diagnostics messages

The following are warning messages that may appear on the instrument LCD in place of the gas
concentration.
Message Meaning
This message appears on the LCD if the purge gas supply fails. To detect this
condition, the voltage signal from the TC sensor is measured. This is normally between
Pur 1-3 volts, depending which gas is being measured.
If the flow of purge gas stops, the sensor voltage wanders outside the permitted range
of 100mV to 4 V. Refer to
This message appears if the sensor is unplugged from its correct position, or if the
Out
temperature is outside the range -5°C to 100°C.
During start-up, this message indicates the instrument cannot complete the start-up
tests successfully. Refer to
contact your local Hach Lange service representative for assistance.
Err
During calibration, this message indicates that the partial pressure of gas is below the
acceptable range (<5 mbar), or that you have pressed a wrong key. Refer to
calibration
Bat The batteries charge are too low for a correct operation of the instrument. Replace the
batteries.
9.2.3 Continuous purge
It may be useful, particularly when seeing a [Pur] error message on your display, to view the purge
voltage of the TC sensor in a continuous purge mode. In this mode, there is no purge/measurement
cycle, as the purge gas is flowing through the sensor continuously.
Table 4 Diagnostic messages
Continuous purge
Taking measurements
on page 21.
on page 29.
on page 14. If the problem persists,
Sensor
English 29