Hach-Lange SC 1000 - Manual (Page 17)

15
Installation
If installed outdoors, provide overvoltage protection between the power and the sc1000
controller. Make sure the data and power cables do not cause tripping and do not contain
any sharp bends. Refer to
Figure 7 for housing breakout information.
High-voltage wiring for the controller is conducted behind the high voltage barrier in the
controller enclosure. The barrier must remain in place unless a qualified installation
technician is installing wiring for power, alarms, or relays. See
Figure 9 for barrier removal
information.
The instrument can be wired for line power by hard-wiring in conduit or by wiring to a
power cord if allowed by local electrical code. A local disconnect designed to meet local
electrical code is required and must be identified for all types of installation.
Do not connect the electrical power supply to the AC power until the sc1000 controller
has been fully wired, fused, and the high voltage barrier and probe module cover have
been replaced.
3.4.1 Installation in hard-wired applications
In hard-wired electrical applications, the power and safety ground service drops for the
instrument must be 18 to 12 AWG. A sealing-type strain relief must be used to maintain
the IP65 environmental rating. See
Figure 6 for strain relief and conduit opening sealing
plug assembly. See Figure 13 for wiring information.
Note: There is no on/off switch to disconnect the probe module from AC Power.
3.4.2 Installation using a power cord
A sealing-type strain relief to maintain the IP65 environmental rating and a power cord
less than 3 meters (10 feet) in length with three 18-gauge conductors (including a safety
N o t i c e
Use only earthed sockets for the connection of this device to the power supply.
If you are not sure if the sockets are earthed, have this checked by a qualified electrician.
In addition to power supply, the power plug also serves to isolate the device quickly from the
mains where necessary.
This is recommended for long-term storage and can prevent potential dangers in the event of a
fault.
Therefore make sure that the sockets to which the device is connected are easy to reach by each
user at all times.
N o t i c e
Pull out power plug before the opening of the device.
N o t i c e
If the mains plug of the power connection cable s removed and replaced by hard wiring, then a
suitable double-pole one-way circuit breaker with clear labeling for the power supply must be
installed in the immediate proximity of the display unit.
All connected signal connection lines must be shielded.