6712SR Refrigerated Sampler
Section 1 Introduction
1-6
EXTENDED PROGRAMMING FEATURES
Pacing •Uniform Time Pacing: Sampling at regular time intervals.
•Nonuniform Time Pacing: Sampling at irregular time intervals.
•Random Interval Pacing: Sampling at unique random time intervals
generated by the controller.
•Flow Pacing: Sampling at regular flow-volume intervals.
•Event Pacing: Sampling each time a user-definable event occurs.
Flow Proportional
Sample Volumes
Allows for sample sizes to be based on flow. (This option is available only
with uniform time pacing.)
Distribution Methods •Composite: Samples deposited in a single large bottle.
•Sequential: Only one sample placed in each bottle.
•Samples Per Bottle: Multiple samples placed in each bottle
•Bottles Per Sample: One sample deposited in multiple bottles
•Multiple Bottle Compositing: A combination of samples per bottle and
bottles per sample distribution methods.
•Time Switched Bottles or Bottle sets: Control the sample distribution
using clock times.
Programmable Sampler
Enable
A 6712SR sampler can be programmed to enable or disable a running
sampling program when readings received from a connected rain gauge,
module, or SDI-12 Sonde meet certain conditions.
Pauses and Resumes Create intermittent sampling schedules.
Two-Part Programming Two-part programming lets you set up a sampling program that divides the
bottles into two groups, filling each group according to separate pacing,
distribution, sampler enable, and pause and resume settings. This is ideal for
storm-water run-off sampling.
Auto Suction Head or Fixed
Suction Head
The suction head, is the vertical distance from the flow stream to the liquid
detector. Extended programming has two settings.
•Auto-Suction Head: The head is automatically determined.
•Fixed Suction Head: A user-definable measurement for the head.
Suction Line Rinses Program setting for the number of times (0 to 3) that the 6712 rinses the
suction line before drawing a sample.
Sampling Retries Program setting for the number of times (0 to 3) that the 6712 attempts to
sample if it fails to deliver the entire sample volume.
Three Flexible
Start Time Settings •Run Immediately: Starts the sampling program immediately.
•Delayed Start: Starts the sampling program after a user-definable delay
of 1 to 999 minutes.
•Clock Time: Starts the sampling program at a user-definable time on one
or more days of the week.
Option for a Continuous
Running Program
Continuous Sampling: When sample bottles are regularly replaced, the
sample distribution can restart with the first bottle set after the last bottle
set is filled, without interrupting the running program.
Table 1-1 6712SR Sampler Features (Continued)