Справочник Пользователя для Hanna Instruments c 214
5
SPECIFICATIONS
Light Life
Life of the instrument
Light Detector
Silicon Photocell
Environment
0 to 50°C (32 to 122°F);
max 90% RH non-condensing
max 90% RH non-condensing
Power Supply
2 x 9 V batteries / 12 to 20 VDC through
voltage adapter
voltage adapter
Auto-Shut off
After 10' of non-use
Dimensions
230 x 165 x 70 mm (9.0 x 6.5 x 2.8")
Weight
640 g (22.6 oz.)
For specifications related to each single parameter (e.g. range, precision,
etc.), refer to the related measurement section.
etc.), refer to the related measurement section.
PRECISION AND ACCURACY
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.
For each parameter, the precision is expressed in the related measurement
section as standard deviation at a specific concentration value of the
analite. The standard deviation is obtained with a single instrument using
a representative lot of reagents.
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.
For each parameter, the precision is expressed in the related measurement
section as standard deviation at a specific concentration value of the
analite. The standard deviation is obtained with a single instrument using
a representative lot of reagents.
76
Description
Range
Method
Ammonia LR
0.00 to 3.00 mg / L
Nessler
Ammonia HR
0 to 100 mg / L
Nessler
Chlorine, Free
0.00 to 5.00 mg / L
DPD
Chlorine, Total
0.00 to 5.00 mg / L
DPD
Nitrate
0.0 to 30.0 mg / L
Chromotropic Acid
Nitrogen, Total
0.0 to 25.0 mg / L
Chromotropic Acid
Nitrogen, Total HR
10 to 150 mg / L
Chromotropic Acid
COD LR
0 to 150 mg / L
Dichromate, Mercuric Sulphate
COD MR
0 to 1500 mg / L
Dichromate, Mercuric Sulphate
COD HR
0 to 15000 mg / L
Dichromate, Mercuric Sulphate
Phosphorus, Reactive
0.00 to 5.00 mg / L
Ascorbic Acid
Phosphorus, Acid Hydrolyzable
0.00 to 5.00 mg / L
Ascorbic Acid
Phosphorus, Total
0.00 to 3.50 mg / L
Ascorbic Acid
Phosphorus, Reactive HR
0.0 to 100.0 mg / L
Vanadomolybdophosphoric Acid
Phosphorus, Total HR
0.0 to 100.0 mg / L
Vanadomolybdophosphoric Acid
STANDARD METHODS
Besides the 12 VDC supply, this meter can also be fed by two 9V
batteries.
To prolong battery life, switch your meter off after use. However, the
meter has an auto-shut off feature that will turn itself off after 10
minutes of non-use.
A blinking "LOBAT" on the display, while a
measurement is in progress, indicates low
voltage and the batteries should be replaced.
If the batteries are not replaced immediately,
in order to prevent erroneous readings due to
low voltage, "-BA-" is displayed soon
afterwards. At this point the batteries must be
changed.
Battery replacement must only take place in a non-hazardous area
using two 9V alkaline batteries.
Remove the battery cover on the back of photometer, attach two fresh
9V batteries, while paying attention to the correct polarity, and replace
the cover.
The meter will turn on automatically when a
new battery is connected. You can turn it off
by pressing ON/OFF.
batteries.
To prolong battery life, switch your meter off after use. However, the
meter has an auto-shut off feature that will turn itself off after 10
minutes of non-use.
A blinking "LOBAT" on the display, while a
measurement is in progress, indicates low
voltage and the batteries should be replaced.
If the batteries are not replaced immediately,
in order to prevent erroneous readings due to
low voltage, "-BA-" is displayed soon
afterwards. At this point the batteries must be
changed.
Battery replacement must only take place in a non-hazardous area
using two 9V alkaline batteries.
Remove the battery cover on the back of photometer, attach two fresh
9V batteries, while paying attention to the correct polarity, and replace
the cover.
The meter will turn on automatically when a
new battery is connected. You can turn it off
by pressing ON/OFF.
BATTERY REPLACEMENT