Hach SD900 Manuel D'utilisation De Base page 18

Option
Tubing life
SDI–12 (optional) Configure the operation of an SDI–12 device. This option is shown only when a device is
Set up a sampling program
A sampling program includes all of the parameters that are necessary to collect samples
automatically. Collect the samples at regular intervals or when the sampling program is complete.
1. Push MENU.
2. Go to PROGRAM SETUP>MODIFY ALL. The first screen is shown.
3. Select or enter the values for each parameter. Use the left and right arrow keys to move left or
right. Use the up and down arrow keys to change a value. Change the units if necessary (gal or
mL) with the arrow keys.
Option
Bottles
Intake tubing
Program delay
Sample
pacing/collection
Sample distribution
Liquid sensor
18 English
Description
Set a reminder when the pump tubing is to be changed. Go to ENABLE>RESET
CYCLES to reset the pump cycle count to 0. Go to ENABLE>CYCLE LIMIT to change
the number of pump cycles that is used for the reminder. Go to ENABLE>STATUS to
show the current number of pump cycle counts.
found.
Description
Bottle quantity: the number of bottles in the sampler (1, 2, 4, 8 or 24).
Full BTL shutoff: Enabled/Disabled. If enabled, the controller checks for bottle
overflow conditions.
Bottle volume: the volume capacity of each bottle. Range: 50–65000 mL (0.01 -
17.17 gal)
Tubing length: the length of the intake tubing from the strainer to the liquid sensor.
Range: 100–3000 cm or 3–99 ft. An accurate length is necessary to get an accurate
sample volume.
Intake tube type: the diameter and material of the intake tubing (¼ in. vinyl, 3/8 in.
vinyl or 3/8 in. Teflon).
Enable/disable: when enabled, the sampling program starts at a specified time or
number of counts. Date and time: the date and time when the program starts (24-
hour format). Counts: the number of counts or pulses from a flow meter when the
program will start (1 to 9999 counts). If the sample pacing is later set to time, the
program delay will be disabled.
Time based—Refer to
Note: When CTVV is used:
• The liquid sensor is always enabled.
• The sample distribution is composite.
• The run mode is non-continuous.
• The first sample is taken after the interval.
• Flow source is always 4–20 mA input.
Flow based—Refer to
Deliver samples to all>YES
Each sample is delivered to all bottles. End after last: program stops after the last
sample (1–999). Continuous: program continues until it is stopped manually.
Deliver samples to all>NO
Samples are delivered to a subset of bottles . Samples/bottle: the number of samples
to be collected in each bottle (1–999). Bottles/sample: The number of bottles that will
contain the same sample.
Enable or disabled. If disabled, the sample volume must be calibrated by time.
Time based collection on page 19.
Flow based collection on page 20.