Operation; Sample Method: Gravity & Peristaltic Pump; Sample Mode: Continuous, Timed, Delayed Start - Waikato SYP User Manual

Operation

SYP features a fully configurable sampling regime including two means of collection and 3
sampling modes (explained below). All modes support a fully configurable purge / rinse cycle
between samples.
Set up and use is described in following sections.
Sample method: Gravity & peristaltic pump
Gravity mode was designed for collecting fluid drips falling from a height. It requires a funnel
or reservoir be set up to collect the liquid, which flows into the machine by gravity alone
(without any mechanical support). Gravity mode uses full vial detection to ensure consistent
sample volume and log when samples are completed.
Gravity mode supports continuous, timed or delayed start modes (explained in detail below).
When setting up the device in gravity mode, ensure there is sufficient hydraulic head
to drive flow to vials by gravity alone. Kinks or dips in tubing will cause operating
issues or missed samples.
Pump mode was designed for sampling surface or ground water. Here a peristaltic pump
moves fluid from a reservoir into vials at user-defined intervals. The pump runs for a pre-
determined time for each sample to ensure consistent volume, which is safe-checked by the
full vial detection feature.
Pump mode supports timed or delayed start modes but not continuous mode.
Pump mode can set up with a funnel or reservoir in tight or cramped settings where
flow to vials by gravity alone is unreliable.

Sample mode: Continuous, timed, delayed start

Timed is the standard mode of operation. A schedule is set by the user dicating sample
interval from 1 to 65,000 hours. By default the system will purge before a sample is taken.
Delayed start mode uses either a user-defined timer or sensor data (air pressure, humidity,
temperature) to trigger sample collection. Once the user-defined threshold is met, the device
continues sampling according to user-defined settings.
Continuous mode provides an option for a flow-based sampling regime. Water is fed into the
system and directly into vials. When the system detects a vial is full, it automatically
timestamps sample completion and immediately begins the next sample. By analysing time
stamps at each sample, flow rate can be inferred.
Continuous mode only works while using gravity as the means of collection.
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