3
Measurement
Sodium (Na
+
) sensor
Ion-selective, flow-through, glass capillary
electrode
Potassium (K
+
) sensor
Ion-selective, flow-through, liquid membrane
electrode
Chloride (Cl
-
) sensor
Ion-selective, flow-through, liquid membrane
electrode
Calcium (Ca
++
) sensor
Ion-selective, flow-through, liquid membrane
electrode
Lithium (Li
+
) sensor
Ion-selective, flow-through, liquid membrane
electrode
Reference System
Open liquid junction, flow-through electrode
Calibration
Fully automatic
1 point with each sample
2 point every 3 hours (9180/9181 every 4 hrs.)
Standby Mode
suspends calibrations
Warm-up time
1 minute
Temperature
Room temperature, 15 - 32° C, 60 - 90° F
Humidity
maximum 85% relative humidity,
non-condensing
Data management
Quality Control memory storage, 3 levels,
35 values; calculation of mean, standard
deviation, and coefficient of variation (CV)
Diagnostic Programs
user-controlled diagnostics,
YES/NO operation via the display
Electronics
Microprocessor-controlled
Display
LCD dot-matrix, 2 line, 16 characters per line
Printer
Integral thermal printer, 16 character width
Autosampler (9181 only)
Integral turntable - 18 positions,
2 mL or 0.25 mL sample cups