Hach 8000A Manuel D'utilisation page 19

Option Description
Show Xdus Shows transducer values. If no transducers are connected,
the display will show No Transducers Present.
Print Xdus Prints transducer values. If no transducers are connected, the
display will show No Transducers Present and no printout will
occur.
Sensr Cal Shows the sensor calibration functions menu. Typically used
by service personnel.
Maint Funcs Shows the maintenance functions menu
User standards
The instrument can save up to four user defined standards.
Change a user defined standard
Use the ALTER STD function to change entries in the current User
Defined Standard or to make a new standard.
There are four screens which together define the standard parameters.
Changes can be made to any of the four screens.
Push ENTER to move to the next screen. Push EXIT to save the
standard and return to the Main Menu.
1. In the Main Function menu, push MORE.
The display shows the Miscellaneous Functions menu.
2. Push USER STD.
The display shows the User Defined Standards Function menu.
3. Push ALTER STD.
The display shows the first of four screens.
4. Update or change the entries in the first screen.
Option Description
Standard name Enter a name for the standard. The name can be
up to 14 characters in length. The name can be a
mix of alpha and numeric characters. If a standard
is not named, the standard cannot be selected.
Option Description
Number of classes Enter the total number of classes, from 1-16.
Cumulative or Select either Cumulative or Differential.
Differential Cumulative: The total of all counts which exceed a
channel threshold setting. Differential: The counts
between the threshold of a channel and the
threshold of the next higher channel.
Class Limit Units The mathematical units used with reference to the
class limits. Counts or counts/xxx mL of the liquid
medium.
Sample volume Enter a value between 0.1 and 9999 mL. This is
the size of the sample.
Classify Select whether the standard is applied to individual
runs, to multiple run averages or to both.
Number of runs Enter a value between 1 and 99 for the total
number of runs done in each test cycle. This value
is also used to calculate run averages.
Number of channels Enter a value between 1 and 8 for the number of
channels that will appear in the displays and
printouts. If the number entered is less than eight,
the cumulative count for the last channel will
include particles larger than the threshold of that
channel. In this situation, the cumulative and
differential counts will be identical.
Counts per ?? mL Sets the maximum limits for each class. For
(This field is active example, if the operator enters a value of 100, the
only if the class limits limits are specified in terms of counts per 100 mL
field is set to of sample. This will be the case regardless of
Counts/xxxmL.) sample volume.
5. Push ENTER.
6. Enter a name up to 8 characters long for each class. Push ENTER.
7. Enter a threshold value in micrometers for each channel. Values
must be within the sensor range. Push ENTER.
Note: Make sure that there is a threshold value in Channel 1 for cumulative
mode operation. For differential mode, Channels 1 and 2 must have a
threshold value. Threshold values must ascend along with the channel
sequence. Channels must be adjacent and must start with Channel 1.
English 19