Bante Instruments 221 User Manual

Troubleshooting I 42
Accuracy
± 0.5% F.S.
Calibration Points
1 to 5 points
Calibration Solutions
10 µ S/cm, 84 µ S/cm, 1413 µ S/cm,
12.88 mS/cm, 111.8 mS/cm
Temperature Compensation
0 to 100° C (32 to 212° F)
Temperature Coefficient
Linear (0.0 to 10.0%/° C)
pure water
Reference Temperature
20° C or 25° C
Cell Constant
K = 0.1, 1, 10 or custom
TDS
Range
0.00 to 10.00 ppt (max. 200 ppt)
Resolution
0.01, 0.1, 1
Accuracy
± 1% F.S.
TDS Factor
0.1 to 1.0 (default 0.5)
Salinity
Range
0.00 to 80.00 ppt, 0.00 to 42.00 psu
Resolution
0.01
Accuracy
± 1% F.S.
Resistivity
Range
0.00 to 20.00 MΩ
Resolution
0.01, 0.1
Accuracy
± 1% F.S.
Dissolved Oxygen
Range
0.00 to 20.00 mg/L
0.0 to 200.0% saturation
Resolution
0.01, 0.1
Accuracy
± 0.2 mg/L, ± 2.0%
Calibration Points
1 or 2 points
Temperature Compensation
0 to 50° C (32 to 122° F)
Pressure Correction
60.0 to 112.5 kPa, 450 to 850 mmHg
Salinity Correction
0.0 to 50.0 g/L
Temperature
Range
0 to 105° C (32 to 221° F)
Resolution
0.1° C (0.1° F)
Accuracy
± 0.5° C (± 0.9° F)
Calibration Point
1 point
Other Specifications
Memory
500 data sets
Communication Interface
USB-B
Operating Temperature
0 to 50° C (32 to 122° F)
Storage Temperature
0 to 60° C (32 to 140° F)
Relative Humidity
< 80% (non-condensing)
Display
LCD, 80 × 60 mm (3.15 × 2.36 in.)
Power Requirements
3 × 1.5V AA alkaline batteries or
5V DC power adapter
Auto-Off
30 minutes after last key pressed
Dimensions
170 (L) × 85 (W) × 30 (H) mm
(6.69 × 3.35 × 1.18 in.)
Weight
300 g (10.5 oz.)
Troubleshooting
Fault
Cause and Corrective Action
Electrode dried out.
Soak the pH electrode in 3M KCl solution for about
30 minutes.
Soak the ion selective electrode in 100 ppm standard
solution for about 30 minutes.
Soak the conductivity electrode in tap water for
about 10 minutes.
Measurement exceeded the maximum range.
Check the electrode and sample.
Drifting erratic
readings
Check whether electrode is contaminated, clogged
or broken.
pH buffer problem. Use freshly prepared buffer
solutions to calibrate the meter.
Electrode has expired. Replace pH electrode.
DO electrolyte solution is depleted.
Refilling electrolyte solution.
Zero oxygen solution is contaminated.
Replace the calibration solution.
Keypad is not
working
Replace the batteries.

Bante Instruments 221 Specifications

General

Brand	Bante Instruments
Model	221
Category	Measuring Instruments
Language	English