6
SPECIFICATIONS
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
2.00 mg/L potassium and a representative lot
of reagent, an operator obtained with a single
instrument a standard deviation of 0.06 mg/L.
Range
0.0 to 10.0 mg/L LR
10 to 100 mg/L MR
Resolution
0.1 mg/L
Accuracy
@25 °C (77 °F)
LR: ±1.5 mg/L ±7 % of reading
MR: ±15 mg/L ±7 % of reading
Light Source
Light Emitting Diode
Light Detector
Silicon Photocell with narrow band interference filter @466 nm
Method
Tetraphenylborate method. The reaction between potassium and the
reagents causes a turbidity in the sample.
Environment
0 to 50 °C (32 to 122 °F); max 95% RH non‑condensing
Battery Type
9V (1 pc.)
Auto‑Shut off
After 10’ of non‑use in measurement mode; after 1 hour of non‑use
in calibration mode; with last reading reminder.
Dimensions
192 x 104 x 69 mm (7.6 x 4.1 x 2.7”)
Weight
320 g (11.3 oz.).
Required Reagents
Code
Description
Quantity/test
HI93750A‑0
Potassium Reagent
6 drops
HI93750B‑0
Powder reagent 1 packet
SPECIFICA
TIONS
PRECISION AND ACCURACY
