HF scientific AccUView Wastewater UV %Transmission Monitor - Manual (Page 14)

3.3 Electrical Connections
The electrical connections to the instrument are made through the two terminal boxes. The
connections are labeled within the terminal boxes and are self-descriptive (see Figures 6 &
7). Please follow all local and government recommendations and methods for installation
of electrical connections to and between the instrument and other peripheral devices.
Plugs are inserted into bulkheads when shipped, to ensure a watertight seal. These plugs
should be removed and discarded when cabling to these connections.
The power cable bulkhead will accept cable diameters from 5.8mm (.230 in.) up to 10 mm
(.395 in.). All terminals are designed to accept wires in the range of 14-28 AWG. All
wires should be stripped to a length of 6 mm (¼”). A strain relief strap is provided to
reduce tension on the power terminals.
It is the user’s responsibility to assure that the watertight seal is maintained after the
terminal box has been wired for operation. If any of the bulkheads are not tightened
properly around a cable or plug, the ratings of the instrument will be jeopardized and there
is a possibility of creating a shock hazard.
Only qualified electricians should be allowed to perform the installation of the
instrument as it involves a line voltage that could endanger life.
TB4
F2 F1
TB1 (A) TB2 (B) TB3
N L
SO
L+
REL
AY (
N O)
REL
AY
( N
C)
PU
MP (
+ )
REL
A
Y ( C
OM) SOL
-
PU
MP (
+ )
100-240 VAC
47-63 Hz
MAIN POWER
TERMINAL
100-250VAC
47-63 Hz
POWER
TERMINAL
SENSOR TO
TERMINAL BOX
POWER
TERMINAL
TO CABINET
HEATER (OPT)
STRAIN
RELIEF
Figure 6: Mains Terminal Box
3.3.1 Power: All mains connections are made in the mains terminal box. The instrument is
equipped with a 100-240 VAC, 47-63 Hz switching power supply; please verify that the
line voltage falls within these specifications. It is recommended that a circuit breaker be
placed prior to the power connection to allow for service. While making connections, refer
to Figure 6. The AccUView Wastewater is supplied with a power cord for 120 VAC
which is UL and CSA approved.
AccUView Wastewater (1/09) 8
Rev. 2.9