Hanna Instruments wm 8910 User Manual

4 5

4 4

MEDIUM DISTANCE, INDOOR/OUTDOOR
INSTALLATION

When an outdoor installation is required, it is necessary to install a
transmitter to obtain accurate readings at distances from 10 to 50 m
(33-165').
Since the introduction of AmpHel

®

 these distances are no longer a

problem. You can now  connect your meter directly to an AmpHel

®

electrode, saving the cost of a transmitter.
The standard cable length of the AmpHel

®

 electrode is 5 m (16.5').

Additional lengths of regular cable up to 50 m (165'), can be
installed without special connectors. Coaxial cables are always pre-
ferred over normal cables due to their excellent insulation, even
though, Amphel

®

 electrodes can operate with both.

AmpHel

®

 electrodes have a micro-amplifier in the electrode cap to

boost the signal, drastically reducing susceptibility to noise and drift.
With all of the components sealed in the electrode body, moisture up
to 100% RH will not effect the signal.

pH METER

WITH AN AmpHel

ELECTRODE

MEASUREMENTS CAN BE

TAKEN FROM DISTANCES UP TO

50 METERS (165 FEET)

WET ENVIRONMENT

RELATIVE HUMIDITY UP TO 100%

MAXIMUM 50 METERS

®

pH CALIBRATION SOLUTIONS

HI 7004M

pH 4.01 buffer solution, 230 mL

HI 7004L

pH 4.01 buffer solution, 460 mL

HI 7006M

pH 6.86 buffer solution, 230 mL

HI 7006L

pH 6.86 buffer solution, 460 mL

HI 7007M

pH 7.01 buffer solution, 230 mL

HI 7007L

pH 7.01 buffer solution, 460 mL

HI 7009M

pH 9.18 buffer solution, 230 mL

HI 7009L

pH 9.18 buffer solution, 460 mL

HI 7010M

pH 10.01 buffer solution, 230mL

HI 7010L

pH 10.01 buffer solution, 460 mL

ORP SOLUTIONS

HI 7020M

200-275mV ORP solution, 230 mL

HI 7020L

200-275mV ORP solution, 460 mL

HI 7091M

Pretreatment reducing sol., 230 mL

HI 7091L

Pretreatment reducing sol., 460 mL

HI 7092M

Pretreatment oxidizing sol., 230 mL

HI 7092L

Pretreatment oxidizing sol., 460 mL

The probe can be compensated for normal contamination by a process
of re-calibration. However, it is recommended that the process conduc-
tivity probe be removed from the system regularly for maintenance.
Rinse the HI 7637     probe with tap water. If a more thorough

cleaning is desired, unscrew the PVC sleeve and clean the sensors with
a non-abrasive cloth and alcohol. When reinstalling the PVC sleeve
onto the probe, be sure that the holes are towards the top of the
probe (the end with the cable).
After cleaning, re-calibrate the instrument. However, if the instrument
will not re-calibrate, replace the probe.
Note: Always re-calibrate the meter after the replacement of the

probe.

AmpHel

®

 is a registered Trademark of "Hanna Instruments"