Hach 911, Руководство пользователя

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36
Meter Installation
fumées ou vapeurs dangereuses de l'emplacement dangereux vers l'emplacement
non dangereux.
Follow the steps mentioned below to route the RS232 Serial Port
1. Attach the cable with the round connector from the Opto-Isolated Interface to the
connector on the 911/940 Flow Meter labelled RS232.
2. Attach the cable with a rectangular connector to the appropriate serial COM port on
the PC or laptop.
4.5 Wiring the Sampler Interface on Model 940
DANGER
All connections to the flow meter must be made in a non-hazardous location.
DANGER
Tous les raccordements au débitmètre doivent être effectués dans un
environnement qui ne présente aucun danger.
All sampler interface wiring must follow the installation drawings in section 4.1 on page 15 .
Refer to Table 7 and Figure 20 .
Table 7 Sampler Cable Connector Pin Assignments and Description
Pin Letter
Wire
Color
Description Rating
A
(+12 V dc)
White +12 V dc input —
B
(Ground)
Blue
Provides the ground line that is used in conjunction with the other signals
on this connector.
—
C
Flow Pulse
Output
Yellow
Used in conjunction with Pin B (ground) to signal a sampler that a
pre-determined amount of flow has accumulated.
+8 V dc. Output
current is 100 mA
dc (max) with a
duration of 500 ms.
D
Sampler
Start
Black
Used to “wake up” a wastewater sampler when a level and/or rainfall set-point
condition is met so that it can begin sampling. Used in conjunction with Pin B
(ground), this line is normally allowed to float and is switched to ground (by
transistor) once the set-point conditions are met.
+24 V dc (max)
E
Event Input
Red
Confirms that a sample has been collected. The time and date of each water
sample appears on the data printout when downloaded using a Data Transfer
Unit or Sigma Support Software.
+12 V dc (max)
minimum 3 second
pulse.
F
Bottle
Number
Input
Green
Used in conjunction with the “Event Input” signal described above. It tells the flow
meter which bottle was used and when a sample was taken. This information
appears in the data printout (see “Sample Times and Dates”) when downloaded
using a Data Transfer Unit or Support Software.
Bottle Number signal description
If the Program Complete Output (Pin F of the auxiliary connector) is disabled on
the sampler, then it is used to transmit the bottle number to the connected
device.
Time A = 200 ms
Time B = 100 ms (50 ms HI 50 ms LO)
If a sample attempt fails, the first pulse width 'B' is 150 ms HI and
50 ms LO.
If Sample Distribution is programmed for multiple bottles per sample mode, only
the first bottle number of the set is transmitted via Pin F.
—