Metex 8760CLP Total Free Chlorine & pH Analyzer - Manual (Page 6)

AQUAMETRIX INC.
1-800-742-1413 www.aquametrix.com
6
INTRODUCTION
The model 8760CLP is AquaMetrix’s industrial quality remote operational total free chlorine and pH
analyzer, designed to provide maximum flexibility, reliability, and ease-of-use. The model 8760CLP
analyzer has been designed to include a pH input to measure sample pH for continual pH
compensation ― ideal for samples with fluctuating pH values. Temperature compensation is obtained
via a temperature sensor in the chlorine sensor.
The chlorine sensor used with the 8760CLP is a galvanic cell that is separated from the process by a
chlorine permeable membrane. As the hypochlorous acid (HOCl) in the process diffuses through the
membrane, a galvanic reaction occurs which produces a current that is proportional to the free available
chlorine concentration. An advantage of the galvanic cell is that an absolute zero measurement can be
obtained; no chlorine present equals no chlorine produced. Many manufacturers use amperometric
technology as opposed to galvanic. Amperometric cells rely on an induced voltage to produce a current.
Since this residual current is always present, an absolute measurement cannot be obtained and the HOCl
concentration measured may be artificially high. Another disadvantage of the amperometric method,
that does not affect galvanic measurement, pertains to iron coating. Polarization attracts iron ions that
may be in the process water which can cause coating of the membrane; iron deposits on the membrane
can skew the chlorine readings.
NOTICE OF COMPLIANCE
US
This meter may generate radio frequency energy and if not installed and used properly, that is, in strict accordance with
the manufacturer’s instructions, may cause interference to radio and television reception. It has been type-tested and
found to comply with the limits for a Class A computing device in accordance with specifications in Part 15 of FCC
Rules, which are designed to provide reasonable protection against such interference in an industrial installation.
However, there is no guarantee that interference will not occur in a particular installation. If the meter does cause
interference to radio or television reception, which can be determined by turning the unit off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
* Reorient the receiving antenna
* Relocate the meter with respect to the receiver
* Move the meter away from the receiver
* Plug the meter into a different outlet so that the meter and receiver are on different branch
circuits
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions.
The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify
and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Government Printing Office,
Washington, D.C., 20402. Stock No. 004-000-00345-4.
CANADA
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the
Radio Interference Regulations of the Canadian Department of Communications.
Le present appareil numérique n’ émet pas de bruits radioélectriques depassant les limites applicables aux appareils
numériques (de la class A) prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des
Communications du Canada.