Connect A Sensor - Hach AS950 Manual Del Usuario

Pin Signal Color
6 Program Green
Complete
output
7 Shield Silver

5.6.5 Connect a sensor

To connect a sensor (e.g., pH or flow sensor) to a sensor port, refer to
Figure 12 Connect a sensor
Section 6 Startup
6.1 Set the instrument to on
Push and hold the Power key on the controller to set the instrument to on.
6.2 Preparation for use
Install the analyzer bottles and stir bar. Refer to the operations manual for the startup procedure.
1
The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
Table 1 Half cable wiring information (continued)
1
Description
Typical state: open circuit.
This output goes to ground
for 90 seconds at the end of
the sampling program.
Use this output to start
another sampler or to signal
an operator or data logger at
the end of the sampling
program.
The shield is a connection to
earth ground when AC power
is supplied to a sampler to
control RF emissions and
susceptibility to RF
emissions.
Rating
This output is an open drain output with
18 V zener clamp diode for over-
voltage protection. The output is active
low with respect to pin 2.
Absolute maximum ratings for the
output transistor: sink current = 200 mA
DC maximum; external pull-up voltage
= 18 VDC maximum
The shield is not a safety ground. Do
not use the shield as a current carrying
conductor.
The shield wire of cables that are
connected to the AUX I/O port and are
more than 3 m (10 ft) should connected
to pin 7.
Only connect the shield wire to earth
ground at one end of the cable to
prevent ground loop currents.
Figure 12.
English 19