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Chapter 15. Specifications
Sensor
Temperature Semiconductor Sensor
Humidity High Molecular Electrostatic Capacity Sensor
Measurement Ranges
Temperature
-20°C-50°C/0°F-120°F
-20°C-80°C/0°F-170°F (with Sensor Extension Cable)
Humidity
20-90%RH (No Condensation)
0-100%RH (with Sensor Extension Cable, No condensation)
Display (LCD)
Resolution 0.1°C/0.1°F, 0.1%RH
Temperature -20°C-80°C/0°F-170°F
Humidity 0-100%RH
Display interval 10 seconds (standard mode), 60 seconds (Energy saving mode)
Others
Dew Point (-80°C-80°C/112°F-170°F)
Absolute Humidity (0-290g/m3)
Battery Checker, Alarm, Chart Speed, Set-Up Mode etc
Recording
Fiber Tip Pen Ink Lower Pen: Temperature (red) Upper Pen: Humidity (blue)
Chart Paper Z-Fold Type, 12m/39.37 ft. (L), 113mm/4.45 in. (W), Folding pitch 40mm/1.57 in
Working width 100mm/3.93 in. (for both Temperature and Humidity)
Feeding Sprocket
Feeding Accuracy ±3mm/0.12 in. (at 12m/39.37 ft. Long Recording)
Chart Speed Recording Cycle
Recording Period
(Reference only)
Battery Service Life
(Standard Mode)
Battery Service Life
(Energy Saving Mode)
(ST-50A) (ST-50M) (ST-50A) (ST-50M)
2.5mm (abt. 0.10 in.)/H 6minutes 6months 3months 3months 6months 4months
5.0mm (abt. 0.20 in.)/H 3minutes 3months 3months 3months 3months 3months
10.0mm (abt. 0.39 in.)/H 1.5minutes 1.5months 1.5months 1.5months 1.5months 1.5months
20.0mm (abt. 0.79 in.)/H 1.5minutes 3/4months 20days 20days 20days 20days
Recording range
Temperature
Full span, 0-50°C (30-130°F), or
*Discretionary enlarged range
* (Central temperature of charts can be set discretionarily.
The ranges from the center are ±25°C, ±10°C, ±25°F or ±50°F)
Humidity
Full span or *Discretionary enlarged range
* (Central humidity of charts can be set discretionarily.
The ranges from the center is ±25%RH or ±10%RH)
Memory storage
(ST-50M only)
Storage medium SD memory card
Storage capacity 128MB-2GB
Storage format Comma-delimited text file (CSV format)
Recording cycle
1minute/1.5minutes/3 minutes/5 minutes/6 minutes/10 minutes/12 minutes/
15 minutes/30 minutes/60 minutes
Stored files Maximum of 512 files: 1 file per day and 1 file per month
Accuracy
Temperature ±1.0°C/±1.8°F (Measurement Ranges at 0-50°C/32-122°F)
Humidity ±3%RH (at 25°C/77°F, Measurement Ranges 20-80%RH)
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Installation
Indoor-use only, installation of altitude up to 2,000 m (6,561 ft). Main supply voltage
fluctuations not to exceed ±10% of the nominal voltage.
condition
Temperature -20°C-50°C/0°F-120°F
Humidity 20-90%RH, No condensation
Vibration No vibration allowed
Installation
Not inclined more than +/-10 degrees from the horizontal plane
(Not inclined more than +/-10 degrees from the vertical plane when mounted on the wall)
: Transport/Storage condition -30°C-70°C/-22°F-158°F
Power Supply
Battery (LR20, 1.5V x 4) : AC Adapter : Instrument Rating
Input power voltage rating : DC9V
Power rating : 5VA
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Callibration
Temperature
(Calibration range: -20°C-80°C, 0.1°C, 0.1°F unit)
Maxium calibration span: ±10°C, ±18°F
Humidity
1-point (Calibration range: 0-100%RH, 0.1%RH unit)
Maxium calibration span: ±20%RH
2-point (Calibration range: 33±5%RH, 75±5%RH)
Alarms
Temperature
(2 points) Upper and lower limits setting
(Range: -20°C-80°C, 1°C/1°F unit)
Humidity
(2 points) Upper and lower limits setting
(Range: 0-100%RH, 1%RH unit)
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Standard Accessories
4 x D size Batteries (used for trial), 1 x Chart Paper,
1 each x Fiber Tip Pen (for Temperature and Humidity), 1 x Operation Manual
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Optional Accessories
Sensor Extension Cable 5m (16.40 ft), 20m (65.62 ft)
and 50m (164.04 ft) ,Dust-Proof and Splash-Proof Cover
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