Product Description

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).