11
HI9920 SPECIFICATIONS
Unplug the instrument from the power supply before
wiring or replacing the fuses.
RANGE
-500 to 1500 mV
RESOLUTION
1 mV
ACCURACY
(@25 °C/77 °F)
±5 mV
TYPICAL EMC DEV.
±6 mV
mA OUTPUT
User-selectable, 0-20 mA or 4-20 mA
over the -500 to 1500 mV range with isolated output
CALIBRATION
Through “CAL” trimmer
SETPOINT RANGE
From -500 to 1500 mV with 2 trimmers:
“COARSE” for approx. regulation, “FINE” for fine tuning
PROPORTIONAL
CONTROL
ORP setting is user adjustable from 0 to 200 mV
and time cycle from 0 to 90 seconds
ALARM CONTACT
Terminals can be configured as Normally Open or Nor-
mally Closed (isolated output Max. 2A/250Vac/30Vdc,
resistive load, 1.000.000 strokes). The alarm is activated
if the ORP value varies by more than user-selectable inter-
val (50 to 250 mV) from setpoint, or due to overdosage
DOSING TERMINALS
Relay terminals (Max. 2A/250Vac/30Vdc, resistive load,
1.000.000 strokes) are activated when mV exceeds
the setpoint (“RED” dosage) or falls below the setpoint
(“OXID” selection)
ENVIRONMENT
-10 to 50 °C (14 to 122 °F);
RH 95% non-condensing
CASE MATERIAL
Fiber-reinforced, flame-retardant ABS
POWER SUPPLY
HI9920-1
: 115 Vac, 60 Hz
HI9920-2
: 230 Vac, 50 Hz
HI9920-3
: 100 Vac, 50/60 Hz
ENCLOSURE
181 x 221 x 142 mm (7.1 x 8.7 x 5.6”)
WEIGHT
1.6 kg (3.5 lb.)
