User Guide

ManualsBrandsHanna Instruments ManualsOtherWM 8910

BOTTOM CONNECTIONS

1. BNC socket for a combination pH electrode

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

pump or electrovalve). This socket is activated by a relay

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.

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

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.

FUNCTIONAL DESCRIPTION WM 8923FUNCTIONAL DESCRIPTION WM 8923

FUNCTIONAL DESCRIPTION WM 8923

pH pH

& CONDUCTIVITY CONTROLLER& CONDUCTIVITY CONTROLLER

& CONDUCTIVITY CONTROLLER

Unplug the instrument from the power supply before

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 ±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