Table 1 Half cable wiring information (continued)
Pin Signal Color
4
Description Rating
6 Program
Complete
output
Green 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.
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
7 Shield Silver 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.
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.
3.4.5 Connect a sensor
To connect a sensor (e.g., pH or flow sensor) to a sensor port, refer to Figure 12.
Figure 12 Connect a sensor
Section 4 Startup
4.1 Set the instrument to on
The refrigerator starts after a 5-minute delay when power is supplied to the sampler. The refrigerator
continues to operate when the controller is set to off or the power is removed from the controller.
Push the POWER key on the controller to set the controller to on.
To set the refrigerator to off, push the POWER key on the controller. Then, disconnect the power
cord on the AWRS or the two power cords on the refrigerated sampler.
4
The wire color refers to the colors of multi-purpose cables. Refer to Accessories—refrigerated
sampler and AWRS on page 31.
English 19
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