Hach-Lange SIGMA SD900 Refrigerated Sampler and All Weather Refrigerated Sampler User Manual - Manual (Page 92)

90
Troubleshooting
7.3 Diagnostic tests
Use the diagnostics option to test for correct operation of the
following components:
• Distributor ( section 7.3.1 )
• Keypad ( section 7.3.2 )
• Display ( section 7.3.3 )
• Liquid sensor ( section 7.3.4 )
• Thermal control ( section 7.3.5 )
• SDI-12 ( section 7.3.6 )
An overview of the available diagnostic tests is shown in Table 2 on
page 45 .
7.3.1 Distributor diagnostic
Use the distributor diagnostic to check for proper operation of the
distributor. The test moves the distributor arm to all 24 bottle
positions regardless of the number of bottles that are specified in
the program.
Note: The distributor diagnostic is only active when the sample program is
configured for multiple bottles.
Procedure:
1. Select DIAGNOSTICS > DISTRIB DIAG from the main menu. The
distributor arm will begin moving to all positions.
2. The display will show ARM MOVING and then return to the
diagnostics menu when the test is complete.
If the arm is not connected or is not able to move to all
positions, the message “arm faulty” will be shown. Review
section 3.3.3.4 on page 34 and section 6.4 on page 80 to make
sure the distributor and arm are set up properly.
7.3.2 Keypad diagnostic
Use the keypad diagnostic to make sure each key on the keypad is
operating correctly.
Procedure:
1. Select DIAGNOSTICS > KEYPAD DIAG from the main menu.
An attempt was made to set a value to
FF number of bottles when:
The difference between total bottle
quantity and FF number of bottles
cannot be equally divided by bottles per
sample
OR
A number is out of range.
Press enter key and choose other
options.
Table 8 SD 900 error and information messages (continued)
Message Reason Action