Hach Sigma 950, Инструкция по эксплуатации инструмента

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24
Controller Installation
4.7 Sampler
4.7.1 Sampler Connections
The sampler interface receptacle is used to connect a wastewater sampler to the 950
Flow Meter.
Cable Required for Sampler Connections
• Multi-Purpose Half Cable Assembly, 10 ft (3.0 m), 6-pin connector on one end, tinned
wire leads on the other end (P/N 941) or
• Multi-Purpose Full Cable Assembly, 10 ft (3.0 m), 6-pin connector on both ends (P/N
940).
• Cables with 25 ft (7.6 m) lengths and custom sizes are also available.
4.7.2 Sampler Programming
1. From the Main Menu, select
SETUP>MODIFY SELECTED ITEMS
.
2. Scroll down and highlight
SAMPLER PACING
using the up and down arrow soft keys.
Press
SELECT
to continue.
3. Enable Sampler pacing using the
CHANGE CHOICE
soft key. Press
ACCEPT
to
continue.
4. Set the Sampler Pacing using the numeric keypad and Change Units using the
CHANGE UNITS
soft key. The 950 Flow Meter will output one
12 V dc pulse each time the specified amount of flow has occurred.
5. Press
ACCEPT
.
Table 3 Sampler Connector Pin Assignments
Pin Signal Description Wire Color Purpose Rating
A 12 V dc (input only) orange Pin A may receive power from an external device, 500 mA
max load.
Pin B provides the ground line that is used in conjunction with
the other signals on the connector. 12 V dc (w/battery)
to 17 V dc pulse
(w/ac power pack)
500 mA max.
B ground brown
C flow pulse output yellow
Used in with Pin B to signal a sampler that a pre-determined
amount of flow has accumulated with a 500 ms pulse.
12 V dc (w/battery)
to 17 V dc pulse
(w/ac power pack)
D sampler start black
Used to “wake up” a waste water sampler when a set point
condition is met so that it can begin its sampling program.
Configure the flow meter for this pin in
Set Point Sampling on page 97 .
Used in conjunction with Pin B, this line is normally allowed to
float and is switched to ground (by transistor) for the entire
period that the set point condition exists.
24 V cd (max) at
100 mA (max)
E event input red
Received from a waste water sampler and indicates that a
sample has been collected. “Sample Taken” information will
appear in the data printout when downloaded.
N/A
F bottle number input green
Received from a waste water sampler and used in conjunction
with the Event Input signal. It tells the flow meter which bottle
was used when a sample was taken. “Sample Times and
Dates” information will appear in the data printout when
downloaded.
N/A