Hanna Instruments wm 8910 User Manual

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Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, notify your Dealer.
Each wall-mounted meter is supplied complete with a power plug and
an instruction manual.
Note: Save all packing materials until you are sure that the

instrument functions correctly. Any defective item must be
returned in the original packaging together with the supplied
accessories.

IMPORTANT:
1. Read the instructions before using the instrument.
2. Check that the voltage rating at the back of the instrument

corresponds to your mains voltage.

3. The instrument should be connected to a mains socket.
4. Never immerse the instrument in water.
5. The instrument is protected by a 2A fuse. Use only a 2A fuse to

replace it.

Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully before using the instru-
ment. This manual will provide you with the necessary information for
a correct use of the instrument, as well as a more precise idea of its
versatility. If you need more technical information, do not hesitate to
e-mail us at tech@hannainst.com.
These instruments are in compliance with the 

 directives

EN 50081-1 and 50082-1.

Hanna's wall-mounted pH, ORP and conductivity controllers     are

specifically designed to meet your process control requirements.
The controllers come equipped with power relays operating at a
maximum of 2A (240V).
Electrodes and probes can be installed quickly and easily. Simply plug
the universal BNC or DIN connector into the socket (and twist it into
a secured position).
Accurate measurements are displayed on a large LCD.
The Hanna WM series of controllers incorporate a triple contact alarm
system. When activated, the alarm contacts will open or close,
triggering the mechanism of your choice, whether a buzzer, light or
any other electrical device.

PRELIMINARY EXAMINATION ........................................................ 3
GENERAL DESCRIPTION ................................................................ 3
MECHANICAL LAYOUTS................................................................. 4
FUNCTIONAL DESCRIPTION WM 8910 .......................................... 6
FUNCTIONAL DESCRIPTION WM 8911 .......................................... 9
FUNCTIONAL DESCRIPTION WM 8912 ........................................ 12
FUNCTIONAL DESCRIPTION WM 8913 ........................................ 14
FUNCTIONAL DESCRIPTION WM 8920 ........................................ 16
FUNCTIONAL DESCRIPTION WM 8923 ........................................ 18
FUNCTIONAL DESCRIPTION WM 8930 ........................................ 20
OPERATIONAL GUIDE ................................................................. 23
pH CALIBRATION ....................................................................... 27
ORP CALIBRATION ..................................................................... 28
CONDUCTIVITY CALIBRATION ...................................................... 29
ADJUSTEMENT OF SETPOINT(S) .................................................. 31
pH VALUES AT VARIOUS TEMPERATURES ................................... 37
TAKING REDOX MEASUREMENTS ................................................. 38
ELECTRODE CONDITIONING AND MAINTENANCE ........................... 40
SUGGESTED INSTALLATIONS FOR pH/ORP ELECTRODES ............... 43
CONDUCTIVITY PROBE MAINTENANCE & CLEANING ...................... 45
ACCESSORIES ............................................................................. 45
WARRANTY ................................................................................ 53
CE DECLARATION OF CONFORMITY .............................................. 55