Gas Specific Data
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SafeCheck 200 Operator’s Manual
27
7. GAS SPECIFIC DATA
Note: Underwriters Laboratories, Inc. has assessed only the combustible gas
portion of this instrument for performance.
Gas
Range Reso-
lution
Accu-
racy*
Drift** Alarm
High***
Alarm
Low***
Oxygen
O
2
0.30% 0.1% ±5% <1% 23.5% 19.5%
Gas Range Resolution Accuracy* Drift** Alarm
High***
Combustibles
(LEL)
0-100% 1%
±5%
<5% 10%
Methane
CH
4
0-5% 0.1%
±5%
<5% 0.5%
* Sensor accuracy, listed by City Technology, as a percentage of the reading. **
Long term output drift listed as percentage of signal loss per month
For the LEL sensor, refers to long term zero drift based on Methane
*** Factory default settings. Recommended for normal use.
Specifications
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SafeCheck 200 Operator’s Manual
28
8. SPECIFICATIONS
Size: 6.9" x 3.4" x 2.0" (17.5 cm x 8.6 cm x 5.1 cm)
Weight: 22 ounces ( 0.6 kg)
Power: Nickel Cadmium Battery Pack - Rechargeable
Nickel Metal Hydride Battery Pack - Rechargeable
Alkaline Battery Pack - 2 "C" Cells (User Replaceable)
Battery Life: 10 hours/charge with the NiCad or NiMH battery pack. 16
hours with alkaline battery pack.
Sensors: Combustible gases/methane (catalytic diffusion type) &
oxygen
Sensor Oxygen and combustible
Configurations:
Measurement: Continuous (one sample/second)
Display: Two line alphanumeric backlighted LCD
Alarms: Pulsating audio tone and flashing visual
Alarm High level, Low level (O2 only), Low battery
Thresholds:
Operating Safety chirp
Indicator:
Temperature -10 to 40°C (14 to 104°F) operating
Range: -15 to 60°C (5 to 140°F) storage
Humidity 0 to 99% relative humidity, non-continuous, non-
condensing
Range: 15 to 90% relative humidity, continuous, non-condensing
Warranty: Sensors 1 year, electronics 1 year
Cell Life Oxygen sensor: 1 year
Expectancy: Combustible gas sensor: unlimited
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