Hach SIGMA 900 User Manual download pdf (Page 24)

Page 24

Explanations of Program Messages

8544operations.fm

Section 4

4.5 Explanations of Program Messages

Item

Number

Message Description of Message

1 READY TO START Indicates that a program is ready to start. To start, press START PROGRAM.

2 PROGRAM HALTED Indicates the sampling program has been interrupted.

3 PROGRAM RUNNING

Indicates that a program is in process. Keys 0, 1 and 2 are the only active keys while a

program is running. If running, halt the program (press HALT PROGRAM) before entering

a new program.

4 PROGRAM COMPLETE

This message is displayed after program completion. To repeat the program, press

START PROGRAM. Press NEW PROGRAM to enter a different program.

RE-ENTER PROGRAM,

DEPRESS *

When the sampler is on, this message will appear if the sampler was turned off during

program entry.

6 PROGRAM DELAY

This is the first message in the programming sequence. If selected, the sampler will

start only after the delay period elapses. A YES response causes message 6a to appear

on the display.

6a 10:35 AM 21JUL03

A time and date are displayed when YES is pressed in response to message 6. The

example to the left signifies 10:35 in the morning, on October 24, 2000.

7 TIMED MODE

If selected, the sampler will operate on a timed cycle basis. Press YES to prompt the

user to enter the number of minutes desired for the time interval between samples.

Press NO to prompt the question described in item 8.

7a INTV = _ _ _ _MIN Enter the value for the interval between samples (in minutes).

8 FLOW MODE?

Press YES, the cause the sampler to operate on a flow proportional basis. It will prompt

the you to enter the number of flow signals that you want the sampler to count down

between samples. Press

NO to prompt the question in item 7.

8a INTV = _ _ _ _CNTS

Enter the value for the number of pulses (counts) that you want to accumulate between

samples. To determine the appropriate number, refer to the programming instructions

for flow proportional operation in section 4.11.

9 OTHER CHANGES

Press NO to retain the previously entered program entries for all remaining programming

steps, and return to the "Ready to Start" standby state. Press

YES to change the

previously programmed entries for all items 10 through 16.

COMPOSITE MODE,

CONTINUOUS MODE

This message appears if only one bottle is entered for the total number of bottles in the

parameter entry mode. Press

YES to the "Continuous Mode?" prompt to take samples at

the programmed interval. The program will terminate only with a full bottle when using

the full bottle float switch (Cat. No. 8847). Press

NO to cause the display to read

"samples = _ _ _". This permits you to enter the desired number of samples, after which

the program will terminate.

11 CHANGE VOLUME?

Press NO to retain the sample volume from the previous program (programming items

13, a–h are skipped), and the display will prompt the message in item 14.

12 SAMPLE VOL = _ _ _

Enter the desired sample volume (in mL) to be delivered to the sample container each

time a sample is initiated.

13 CALIBRATE VOL?

This message appears after you enter sample volume. If greater volume accuracy is

desired, press

YES. Press NO to skip the calibration and go to the next step.

13a READY TO PUMP?

When YES is pressed the sampler will pump to collect one sample. The pump will first

pre-purge the intake line, draw sample liquid, and then post-purge.

Before pressing YES, pull the pump tubing off of the fitting where it enters the sampler

housing and place a graduated cylinder at the sample discharge point.

13b STOP AT MARK

After pressing YES in response to item 13a, the pump will pre-purge the intake line and

begin pumping liquid into the graduated container. When the desired volume has been

delivered, press STOP PUMP. The pump will then purge the intake tubing. The sampler

will hold the time to deliver the desired sample volume in memory. This timed volume is

repeated for subsequent samples.

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Hach SIGMA 900 User Manual Page 24

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