Hach 9501000 Instrucciones Para El Usuario página 11

Table 3 Descriptions of the junction box terminals (continued)
Terminal Signal
6 Special
output
7 Program
Complete
output
8 Shield
Add the silicone gel
The first quantity of silicone gel that is dispensed is not mixed at the correct ratio. Discard the first quantity or the
silicone gel mixture will not correctly form.
Add the silicone gel to prevent the effects of vibration. This task is optional.
When the wire connections are complete, add the silicone gel to the junction box as shown in the
illustrated steps that follow.
Description
This output goes from 0 to
+12 VDC with respect to Terminal
1 after each sample cycle. Refer to
the Mode setting of the hardware
settings for the AUX I/O port. Refer
to the AS950 operations
documentation.
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.
N O T I C E
Rating
This output has protection against short circuit
currents to Terminal 1. External load current:
0.2 A maximum
Active high output: 15 VDC nominal with AC
power to the AS950 controller or a 12 VDC
nominal with battery power to the
AS950 controller.
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 Terminal 1.
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 Terminal 6.
Only connect the shield wire to earth ground at
one end of the cable to prevent ground loop
currents.
English 11