5
Range
0.00 to 5.00 mg/L
Resolution
0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 mg/L above 3.50 mg/L
Precision
±0.02 mg/L @ 1.00 mg/L
Typical EMC Deviation
±0.01 mg/L
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Light Detector
Silicon Photocell
Method
Adaptation of the Standard Method 4500-Cl G. The reaction between
free chlorine and the DPD reagent causes a pink tint in the sample.
Environment
0 to 50°C (32 to 122°F); max 95% RH non-condensing
Battery Type
1 x 9 volt
Auto-Shut off
After 10' of non-use in
measurement mode
;
after 1 hour of non-use in
calibration mode
.
Dimensions
180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight
290 g (10 oz.).
REQUIRED REAGENTS
Code
Description
Quantity/test
HI 93701-0
Free Chlorine Reagent
1 packet
Precision is how closely repeated
measurements agree with each other.
Precision is usually expressed as standard
deviation (SD).
Accuracy is defined as the nearness of a test
result to the true value.
Although good precision suggests good
accuracy, precise results can be inaccurate.
The figure explains these definitions.
In a laboratory using a standard solution of
1.00 mg/L chlorine and a representative lot
of reagent, an operator obtained with a single
instrument a standard deviation of
0.02 mg/L.
SPECIFICATIONS
PRECISION AND ACCURACY
16
CALIBRATION PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays “701”, it is ready.
• Enter the
calibration mode
by holding CAL CHECK
for three seconds.
• The date of the last calibration appears (e.g.:
month “01”, day “08”). “F.CAL” means that the
factory calibration is selected.
Note
: at this point it is possible to reset the
instrument to restore FACTORY CALIBRATION, see
instructions page 18.
• Place the CAL CHECK™ Standard Cuvet
A
into
the holder and ensure that the notch on the cap is
positioned securely into the groove.
• Press ZERO and “SIP” will blink on the display.
• After a few seconds the display will show “-0.0-”.
The meter is now zeroed and ready for calibration.
• Remove the cuvet.
• Place the CAL CHECK™ Standard HI 95701-11
Cuvet
B
into the holder and ensure that the notch
on the cap is positioned securely into the groove.
Note
:
it is possible to interrupt calibration procedure at any time by pressing ON/OFF.
Warning
: do not validate or calibrate the instrument with standard solutions other than the Hanna
CAL CHECK™ Standards, otherwise erroneous results will be obtained.
or
CALIBRATION PROCEDURE
