Start Or Stop The Pump; Troubleshooting; Do A Diagnostic Test - Hach AS950 Operation Manual

4. Push Enter. The distributor arm moves to the selected bottle.
Note: To stop the distributor arm at any time, push STOP.

Start or stop the pump

Operate the pump manually to collect a sample or purge the intake tubing.
1. Push MANUAL OPERATION.
2. Select Operate Pump.
3. Select an option.
Option
Pump (Run Forward)
Purge (Run Backward) The pump operates in the reverse direction to purge the intake tubing.
4. Push STOP to stop the pump.

Troubleshooting

Problem
The red indicator light
flashes.
"---" shows on the
Status screen.
No measurement data
shows.
Some measurements
supplied to the sampler
do not show on the
Status screen or the
Measurement Data
screen.

Do a diagnostic test

Use the diagnostic tests to examine the operation of individual components.
1. Push MENU.
2. Select DIAGNOSTICS.
3. Select an option.
Option
Status
Event Log
Alarm Log
Description
The pump operates in the forward direction to collect a sample and deposit the
sample in a sample container.
Possible cause
One or more measurements
that the sampler is
configured to use (e.g., pH
and flow) is not available
because the sensor(s) is not
connected to the sampler.
The measurement is not
available or has not been
recorded yet.
The data log is empty.
Only the measurements
recorded to the data log
show.
Description
Shows the Status screen. Refer to
Shows the event log. Refer to
Shows the alarm log. Refer to
Solution
Connect the missing sensor to the sampler or make
sure that the sampler is not configured:
• To record sensor measurements to the data log that
are not available.
• With alarms for sensor measurements that are not
available.
The measured values shown are the last recorded
value. Measurement data is recorded to the data log in
accordance with the selected logging interval.
Make sure that the measurement is supplied to the
sampler.
Measurement data is recorded to the data log in
accordance with the selected logging interval.
Refer to Configure data logging
To see all the measurements supplied to the sampler
by a sensor(s) connected to a sensor port, select
Diagnostics>Sensor Ports.
To show all the measurements supplied to the sampler
by an external instrument(s) that is connected to the
AUX I/O port, select Diagnostics>AUX and I/O Port.
Show the program status
Show the event log on page 26.
Show the alarm log on page 27.
on page 11.
on page 24.
English 29