Hach 366 Serie Manual Básico Del Usuario página 4

1.2 Customer supplied cable requirements
"Safe" area analog output, alarm output, and RS-232 or RS-485 cables are "control" cables (that is,
not power cables). They must be shielded cables that meet the specifications below:
External diameter
Wire (core) area
Insulation
Nominal voltage
Absolute maximum voltage
Absolute maximum current
Wire resistance
Capacitance @ 800 Hz
Table 2 Hazardous area analog recorder output and RS-485 cable
Maximum length
Number of wires
External diameter
Wire (core) area
Insulation
Nominal voltage
Absolute maximum voltage
Absolute maximum current
Wire resistance
Capacitance @ 800 Hz
Number of wires
External diameter
Wire (core) area
External diameter
1.3 Instrument configurations
Model
366x EX / 1xx
366x EX / 2xx
4 English
Table 1 Safe area analog and alarm output cable
1000 m
2 (twisted cable for RS-485)
6.5 mm max
2
0.5 mm
PVC
250 V
1200 V
6 A
39 Ω/km or less
wire: 150 pF/m or less; screen: 290 pF/m or less
Table 3 Power cable
3-wire (live, neutral and earth)
≥ 6 mm; ≤ 10.5 mm
2
≥ 1 mm , AWG18; ≤ 2.5 mm
Table 4 External pressure sensor cable
Gas Phase
O * Dissolved
2
Gaseous
H Dissolved
2
Gaseous
≥ 4 mm; ≤ 6 mm
2
0.14–0.25 mm (26–24 AWG)
PVC
250 V
1200 V
1.5–2.5 A
70–140 Ω/km
wire: 100 pF/m; screen: 240 pF/m
(20 AWG) or more
2
, AWG14
≥ 4 mm; ≤ 6 mm
Concentration units
ppb/ppm; ppm; mg/L
Pa/kPa; mbar/bar; %; % sat; ppm/%
Pa/kPa; mbar/bar; %
ppb/ppm; cc/kg