Agilent Technologies 3200D, Operating Manual

Page: 54 / 116

54 3200D Dissolved Oxygen Meter Operating Guide
3 Troubleshooting and Maintenance


Troubleshooting the 3200D Dissolved Oxygen Meter
Table 3 lists common problems, possible causes, and how to
resolve them.
Note that improper operation of the DO probe causes abnormal
readings. During measurement, soak the probe tip completely in
solution.
Table 3 3200D Troubleshooting
Number Failure mode Failure cause Solutions
1 No display after meter starts
up. The display is not lit up. 1 Power adaptor not installed correctly.
2 The power supply does not meet with the
requirements.
3 The power adaptor is damaged.
4 The power socket has poor contact.
5 The LCD is damaged (After start up for a
few minutes, the user can hear a buzzing
sound after pressing
[On/Off] key, but
there is no display on LCD.)
1 Reconnect.
2 Use the required power
supply.
3 Replace the power adaptor.
4 Ensure there is a good
contact.
5 Contact Customer Service.
2 Display is dim. Check the power adapter.
3 No buzzing when pressing
key 1 You may have pressed invalid keys under
the current setup.
2 The buzzer has been damaged.
The buzzer only sounds when
you press a valid key.
4 No response when pressing
key 1 You may have pressed invalid keys under
the current setup.
2 The key has been damaged.
Press the valid key for
operation.