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Section 4

Page 27

8544operations.fm Programming the Sampler for Level Control

4.9 Programming the Sampler for Level Control

Put the sampler in a standby state (i.e. "Program Halted", "Ready To Start" or

"Program Complete") hold

CLEAR ENTRY for two seconds. This will cause the

display to read

"Level Control?". The following messages may be displayed in

the level control program:

Note: In addition to the liquid level actuator, a Multi-purpose Half cable (Cat. No. 941

or 541) may be used to connect the sampler to any controlling device which

produces a dry contact closure upon a predetermined conditions. For example, a

pH meter with adjustable high/low set points can be used to control sampler

operation in any of the three level/auxiliary control modes.

4.10 Other Displayed Messages

Item

Number

Message Description of Message

1 LEVEL CONTROL

If you press NO, SPECIAL OUTPUT? will appear on the display. If you press YES, the

display shows item 2.

2 LEVEL START?

If you press YES, the sampler operates as described in Mode 1. If you press NO, the

display shows item number 4.

3 LEVEL START/STOP

If you press YES, the sampler operates as described in Mode 2. If you press NO, the

display shows item number 5.

4 SAMPLE ON LEVEL?

If you press YES, the sampler operates as described in Mode 3. If you press NO, the

display shows item number 1.

Message Description of Message

YES/NO or * TO

BACKUP

This message appears if a key other than YES or NO is pressed and the displayed message is

followed by a question mark while in the Parameter Entry, Programming Running, or Time Set

modes.

WHILE RUNNING, KEY

0 - 1 - 2 ONLY

This message appears if a key other than 0, 1, or 2 is pressed while the program is running. The

program must be halted (press the

2 key) before any manual operations are performed, such as

Bottle Advance, Pump, Purge, Take Sample, New Program, etc.

REVIEW RESULTS?

This message appears if DISPLAY FEEDBACK is pressed and the sample program has been halted.

A YES response will cause the sample program results to appear. A NO response causes REVIEW

PROGRAM?

to appear.

REVIEW PROGRAM?

If you press the YES key, all programmed settings will appear on the display. Pressing the NO key

will place the sampler back into the standby state.

LOW BATTERY This message indicates that the external battery is low and requires recharging.

MEMORY POWER LOW This message indicates that the internal lithium battery is low and needs to be replaced.

PROGRAM STOPPED

DUE TO FULL BOTTLE

During composite mode, this message appears upon a full bottle condition. The program cannot

be restarted until the composite container is emptied and the float switch is in the lowered position.

BOTTLE IS FULL

If your instrument is programmed for single container composite sampling, this message appears

if the

START PROGRAM key is pressed and the float switch is not in the lowered position. Because

the same circuit path is used for the composite full bottle float switch (composite mode) and

bottle indicator (multiple bottle mode), this message will also appear if the START PROGRAM key

is pressed with the sampler programmed for single container composite with the distributor

assembly in place, and the arm in the #1 bottle position. To correct this situation, remove the

distributor, install the composite container retainer, and press the

START PROGRAM key.

FULL BOTTLE or

PROGRAM HALTED

DUE TO FULL BOTTLE

The full bottle float switch is in the raised position due to a full composite container. To resume the

program, exchange the full container with an empty one. With the float switch in the lowered

position, the program will resume within one minute.

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