9
HI9911 SPECIFICATIONS
Unplug the instrument from the power supply before
wiring or replacing the fuses.
RANGE
0.00 to 14.00 pH
RESOLUTION
0.01 pH
ACCURACY
(@25 °C/77 °F)
±0.02 pH
TYPICAL EMC DEV.
±0.1 pH
mA OUTPUT
User-selectable, 0-20 mA or 4-20 mA
over the 0-14 pH range with isolated output
CALIBRATION
Through “OFFSET” and “SLOPE” trimmers
(Max. ±1.5 pH for offset and 80 to 110% for slope)
TEMPERATURE
COMPENSATION
Manual from -10 to 80 °C (14 to 176 °F) or
Automatic with a 3-wire Pt100 probe from 0 to 50 °C
(32 to 122 °F)
SETPOINT RANGE
From 0.00 to 14.00 pH with 2 trimmers: “COARSE”
for approx. regulation, “FINE” for fine tuning
PROPORTIONAL
CONTROL
pH is user adjustable from 0 to 2.0 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 pH varies by more than user-selectable interval (0.5 to
2.5 pH) from setpoint or due to overdosage
DOSING TERMINALS
Two sets of independent relay terminals (Max.
2A/250Vac/30Vdc, resistive load, 1.000.000 strokes)
are activated whenever pH exceeds the “ACID” setpoint
(Acid dosage) or falls below the “ALK” setpoint (Alkaline
dosage)
ENVIRONMENT
-10 to 50 °C (14 to 122 °F);
RH 95% non-condensing
CASE MATERIAL
Fiber-reinforced, flame-retardant ABS
POWER SUPPLY
HI9911-1
: 115 Vac, 60 Hz
HI9911-2
: 230 Vac, 50 Hz
HI9911-3
: 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.)
