Hanna Instruments wm 8910 User Manual
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BOTTOM CONNECTIONS
1. BNC socket for a combination pH electrode
2. DIN socket (7-pin) for HI 7637 conductivity probe with ATC
2. DIN socket (7-pin) for HI 7637 conductivity probe with ATC
3. Input voltage supply socket
4. Output voltage socket for pH dosing (supplies power to a
4. Output voltage socket for pH dosing (supplies power to a
pump or electrovalve). This socket is activated by a relay
when the pH is higher than the setpoint.
when the pH is higher than the setpoint.
5. Output voltage socket for conductivity control. This contact is
automatically closed when the conductivity value is higher
than the setpoint.
than the setpoint.
FRONT PANEL
Left panel
1. LCD display for pH measurements
2. Graded dial for setting the pH setpoint (4.00 to 10.00 pH)
3. LED that lights up when the pH dosage is activated.
4. Offset (pH 7) and Slope (pH 4) calibration trimmers
5. LCD display for conductivity measurements
6. Graded dial for conductivity setpoint (0.50 to 5.00mS/cm)
7. LED that lights up when the conductivity dosage is activated.
8. Offset (0 mS) and Slope (5.0 mS) calibration trimmers
2. Graded dial for setting the pH setpoint (4.00 to 10.00 pH)
3. LED that lights up when the pH dosage is activated.
4. Offset (pH 7) and Slope (pH 4) calibration trimmers
5. LCD display for conductivity measurements
6. Graded dial for conductivity setpoint (0.50 to 5.00mS/cm)
7. LED that lights up when the conductivity dosage is activated.
8. Offset (0 mS) and Slope (5.0 mS) calibration trimmers
Right panel
9. Triple contact alarm to select the alarm in a normally closed
(NC) or a normally open (NO) position. The alarm contact is
activated when the pH varies by more than ±2.0 pH from
the setpoint or the conductivity by more than ±0.5 mS/cm
from its setpoint.
activated when the pH varies by more than ±2.0 pH from
the setpoint or the conductivity by more than ±0.5 mS/cm
from its setpoint.
FUNCTIONAL DESCRIPTION WM 8923
FUNCTIONAL DESCRIPTION WM 8923
FUNCTIONAL DESCRIPTION WM 8923
FUNCTIONAL DESCRIPTION WM 8923
FUNCTIONAL DESCRIPTION WM 8923
pH
pH
pH
pH
pH & CONDUCTIVITY CONTROLLER
& CONDUCTIVITY CONTROLLER
& CONDUCTIVITY CONTROLLER
& CONDUCTIVITY CONTROLLER
& CONDUCTIVITY CONTROLLER
Unplug the instrument from the power supply before
replacing the fuse.
replacing the fuse.
Specifications
WM 8923D
WM 8923U
RANGE
0.00 to 14.00 pH and 0.00 to 19.99 mS/cm
RESOLUTION
0.01 pH and 0.01 mS/cm
ACCURACY
±0.02 pH and ±2% Full Scale
(@20°C/68°F)
TYPICAL EMC
TYPICAL EMC
±0.1 pH
DEVIATION
±2% Full Scale
CALIBRATION
2 point for each pH and conductivity
SETPOINT RANGE
pH : 4.00 to 10.00; Conductivity: 0.0 to 5.00 mS/cm
ALARM CONTACTS
Normally open or normally closed isolated outputs
(Max. 2A, Max.240V, resistive load, 1,000,000 strokes)
(activated if the pH varies by ±2 pH or the
conductivity by ±0.5 mS/cm from the setpoints.
POWER SUPPLY
220/240V – 50/60Hz
110/115V – 50/60Hz
POWER SUPPLIES
One plug for pH (acid) and another for conductivity
FOR DOSING
control (115 or 220V, Max. 2A, 1,000,000 strokes)
ENVIRONMENT
-10 to 50°C (14 to 122°F); max. 85% RH non-condensing
PROTECTION
IP54
WEIGHT
1.6 Kg (3.5 lb.)
ENCLOSURE
181 x 221 x 142mm (7.1 x 8.7 x 5.6")
MATERIAL
Housed in rugged, fiber-reinforced polypropylene case