Hanna Instruments c 114 User Manual

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digits and can display the measured param-
eter in hundredths. The lower level has three
characters and indicates current mode (e.g.
F CL for free chlorine or TR for turbidity).
Different LCD segments indicate low battery,
logging mode, date, time, etc.

A pure Green LED has been utilized as a
light source for both turbidimetric and colori-
metric measurements. A silicon photocell is
used to receive transmitted light from colori-
metric channel while another photocell re-
ceives scattered light from the turbidimetric
(nephelometric) channel.

In order to measure chlorine parameters, all
the operator has to do is zero the blank
sample and then add 1 packet of reagent.
After placing the cuvet back in the meter and
pressing READ, the measurements are shown
directly on the LCD.

The instrument operates with four AA batter-
ies and may be operator-programmed to turn
itself off automatically after 10, 20, 30, 40, 50
or 60 minutes of inactivity.

C 114 and all accessories such as sample
vials, reagent pillows, primary standards, can
be easily stored in the optional carrying case
(HI 710031).

The Hanna C114 is a portable microproces-
sor driven, multiparameter instrument. The
meter measures Free & Total Chlorine and
Turbidity.

In the colorimetric mode, the user can select
either factory preprogrammed calibration set-
tings or calibrate the meter using customized
calibration values based on the concentration
or relative absorbance of the sample. Calibra-
tion data is also stored in a non-volatile
EEPROM.

In the turbidity mode, periodic recalibration of
the meter with primary standards according
to regulatory requirements or personal experi-
ence is suggested. Turbidity ranges are 0.00-
9.99 NTU and 10.0-50.0 NTU.

C114 complies with G.L.P. Standards (Good
Laboratory Practice), that is:

• When switched on, the LCD displays all

segments (display check).

• Battery status is monitored during every

measurement cycle warning the user if the
batteries become weak. In addition, C102
will turn itself off before low voltage causes
erroneous readings.

• It utilizes a real time clock and recalls

calibration data such as date, time and
calibration values.

To facilitate field tests, the meter provides a
logging mode. In this mode, the user can
store up to twenty five time-tagged measure-
ments in RAM and scroll the memory at any
time.

There are eight keys for the different opera-
tional modes. The large Liquid Crystal Dis-
play is dual-level: the upper level has four