HYGRO-MOISTURE METER
MODEL: 291
Customer Approved By: Prepared By:
CHY FIREMATE CO., LTD.
NO.3 SHENG-LI 1ST STREET, HSIN-TIEN VILLAGE,
JEN-TE HSIANG, TAINAN HSIEN, TAIWAN R.O.C.
TEL: 886-6-2794811 FAX: 886-6-2700227
E-Mail:
chy@ksts.seed.net.tw
Ver. 1.2 091310
Bruce Hsieh
Engineer Manager
CHY
FEATURES
Measure % moisture of wood & building materials.
Conductivity measurement on electrical.
Settable measuring ranges for different materials.
%RH humidity measuring, Dew point and wet bulb.
MAX/MIN/AVG and HOLD functions.
Auto-power off function.
Backlight function.
Protective cap for safe storage.
Attached with carrying strap.
Storage temperature:
-20°C to 60°C, 0 to 80% R.H. with battery removed from
meter.
Low battery indication:
The “
” is displayed when the battery voltage drops
below the operating level.
Battery:
1.5Vx2pcs AAA size.
Dimensions:
24.7mm(T) x 50.9mm(W) x 132.9mm(H)
Weight:
Approx. 118g including batteries.
MEASURING RANGES
Sensor:
Electrical Resistance
Moisture material
8.8 to 54.8%
For beech, spruce, larch, bi
rch cherry and walnut
(Grouped as wood 1)
7.0 to 47.9%
For oak, pine, maple, ash-tree, Douglas-fir and meranti
(Grouped as wood 2)
0.9 to 22.1%
For cement screed, concrete and plaster (Grouped as mortar 3)
0.0 to 11.0%
For anhydrite screed (Grouped as mortar 4)
0.7 to 8.6%
For cement mortar (Grouped as mortar 5)
0.6 to 9.9%
For lime mortar (Grouped as mortar 6)
0.1 to 16.5%
For brick (Grouped as mortar 7)
Accuracy:
Conductivity measurement: ±1% at 23±5°C(73.4±9°F)
Resolution:
0.1%
RELATIVE HUMIDITY
Sensor:
Digital Capacitive humidity sensor
Range:
0% to 100% RH
Accuracy:
±2.5% 10% to 90% RH
±5% 0% to 10% RH, 90% to 100% RH
Sensor Response Time for 90% of Total Range:
60sec typical.
Sensor Hysteresis(excursion of 10% to 90% to 10%
RH):
±1.0%RH typical.
TEMPERATURE RANGES
Sensor:
Thermistor temperature sensor, NTC
Range:
-20°C to 60°C, -4°F to 140°F
Resolution:
0.1°C / 0.1°F
Accuracy:
±0.5°C for 0°C to 45°C
±1.0°C for -20°C to 0°C, 45°C to 60°C
±1.0°F for 32°F to 113°F
±2.0°F for -4°F to
32°F, 113°F to 140°F
Measurement rate:
1 time/second
Operating environment:
-20°C to 60°C at<70% R.H.
Stated accuracy at 23°
C±5°C, <70% R.H.
Temperature Coefficient:
0.1 times the applicable
accuracy specification per °C
out of 18°C to 28°C(64°F
to 82°F).
