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 (activated by a relay
4. Output voltage socket for pH dosing (activated by a relay
when pH is higher than setpoint)
5. Output voltage socket for conductivity control (closed when the
conductivity is higher than 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 3.00 mS/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 3.00 mS/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 (activated when the
pH varies by more than ±2.0 pH from the setpoint).
pH varies by more than ±2.0 pH from the setpoint).
FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913
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 8913D
WM 8913U
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: 0.50 to 3.00 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 ±2.0 pH or conductivity
by ±0.5 mS/cm from the setpoints.
POWER SUPPLY
220/240V – 50/60Hz
110/115V – 50/60Hz
POWER SUPPLIES
One plug for the 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 142 mm (7.1 x 8.7 x 5.6")
MATERIAL
Housed in rugged, fiber-reinforced polypropylene case