Hanna Instruments Turbidity & Chlorine Measurements HI 93114 User Manual

Page of 19
5
4
The large dual-level display can show the
measured parameter on the main part, while
the lower level indicates current mode (e.g.
“F CL” for free chlorine or “TR” for turbidity).
Additional symbols show low battery condi-
tion, logging mode, date, time, etc.
A pure green LED is utilized as light source
for both turbidimetric and colorimetric mea-
surements. A silicon photocell receives the
transmitted light from colorimetric channel,
while another photocell detects the scattered
light from the turbidimetric (nephelometric)
channel.
In order to measure chlorine parameters, it is
necessary to do the zero with the blank
sample, and then add 1 packet of reagent.
After placing the cuvet back in the meter and
pressing READ, the measurement is shown
directly on the LCD.
The instrument also features an automatic
shut-off with user-selectable delay at 10, 20,
30, 40, 50 or 60 minutes.
GENERAL DESCRIPTION
With the hand held HI 93114, three important
parameters in water quality analysis are at your
fingertips. Free and total chlorine measure-
ments and US EPA compliant turbidity mea-
surements are performed quickly and reliably
with this lab-grade microprocessor-based field
instrument.
HI 93114 is particularly useful for potable water
measurements and municipalities.
With  HI 93114 measurements can be per-
formed using either concentration or relative
absorbance of the sample depending on the
requirements of the application.
HI 93114 can be calibrated using the factory
preprogrammed calibration points or can be
custom calibrated when in colorimetric mode.
This rugged instrument has been engineered to
offer all the sophistication and reliability of
benchtop laboratory instrumentation in the size
of a handheld meter.
HI 93114 complies with GLP 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, the
meter 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 for storing up to 25 measure-
ments along with time and date information
for retrieval at a later date.