Dwyer Instruments THI2-10 Manuale utente

Model THI2-10 Digital Remote Sensing Thermohygrometer

Specifications - Installation and Operating Instructions

Bulletin TE-THI2-10

S ECIFICATIONS

Service: Humidity and temperature detection in air.

Range:

Relative humidity measurement range: 0 to 100%;

Temperature range: 14 to 140°F (-10 to 60°C);

Dew point temperature range: -100 to 139.8°F (-73.4 to 59.9°C);

Wet bulb temperature range: 7.88 to 139.8°F (-13.4 to 59.9°C).

Accuracy:

Relative humidity accuracy: ±3% from 10 to 90% (at calibration

temperature); ±5% for others;

Temperature accuracy: ±1°F (±.6°C).

Display: Dual LCD display for temperature and humidity.

Temperature Limits:

Ambient: 32 to 122°F (0 to 50 C);

Storage: 68 to 140°F (-20 to 60°C).

Resolution:

Temperature resolution: 0.1°C/°F;

Humidity resolution: 0.1% RH.

ower Requirements: 4 AAA batteries included.

Weight: 5.3 oz (150 g).

Agency Approval: CE.

The THI2-10 Digital Remote Sensing Thermohygrometer accurately takes

humidity, temperature, dew point and wet bulb temperatures inside of ducts and hard

to reach areas. English and metric engineering units as well as the type of

measurement displayed can be easily selected using the push buttons. The push

buttons also allow the user to freeze the current reading or retrieve the minimum and

maximum readings. A large backlit LCD digital dual display allows the user to see both

the temperature and humidity simultaneously and a low battery indicator shows the

user when to change batteries. For hands free operation, the thermohygrometer can

be mounted on a tripod. All units include 4 AAA batteries and a hard carrying case for

safe

O ERATING INSTRUCTIONS

LCD & Keypad:

ower ON/OFF:

1. Press the button to turn on the meter and enter normal mode. Unit will

automatically turn off after 20 minutes without any buttons being pressed.

2. Press the same button to turn off the meter in any mode.

Back Light:

Press the key to turn on the back light of the LCD for 10 seconds.

Unit Selection:

In normal mode, press to switch the units between °C and °F.

Hold Reading:

1. Only in normal mode, press to freeze the current reading.

2. Press again to return to normal display.

8-5/8

[219.00]

2-13/32

[61.07]

1-1/8

[28.77]

6-45/64

[170.31]

1-19/64

[33.05]

2-49/64

[70.43]

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

Air/Dew oint/Wet Bulb:

Press and hold to switch between air temperature, dew point (DP) and wet bulb

temperature (WBT) in normal mode.

Current/Min./Max Values:

1. Press to cycle the display between the current value, minimum value, and

maximum value.

2. Press and hold more than one second to reset the minimum and maximum

values.

Disable Automatic Shut Off:

While the meter is off, press + to turn on the meter for continuous use.

Calibration:

1. To turn off the meter, plug the meter probe into a 32.8% salt bottle and hold the +

key for more than one second to turn on the meter and enter calibration mode.

2. You will see 3x.x% is flashing on the LCD.

After 30 minutes, the “3x.x%” will stop flashing, meaning that the calibration is finished

and saved. You can also manually end and save the calibration by holding the key

for more than one second.

3. ove the meter probe into a 75.3% salt bottle and hold “ N/ X/RST” for more than

one second to enter the 7x.x% calibration. “7x.x% will flash on the LCD”.

4. “7x.x%” will stop flashing after 30 min. The calibration has been completed. You can

manually end and save the calibration by holding the key for more than one

second.

Troubleshooting:

MAINTENANCE/RE AIR

Upon final installation of the odel THI2-10, no routine maintenance is required. The

odel THI2-10 is not field serviceable and should be returned if repair is needed.

Field repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact

customer service to receive a Return Goods Authorization number before shipping the

product back for repair. Be sure to include a brief description of the problem plus any

additional application notes.

When the meter is on, pluging the probe into the calibration

solution will also result in “E 33” or “E 34” in max. and min. mode.

NOTICE

a) Auto power off is automatically disabled during calibration

procedure.

b) In order to get a high accuracy, you must do the calibration at 23 ± 2°C (69.8 ±

3.6°F) and in a steady airflow room.

c) Once the calibration is finished, if the value differs from 7x.x% or 3x.x% for more than

.3%, it means the calibration has failed (see troubleshooting 3.)

NOTICE

Symptom

ower On But No Display

Display Disappeared

Calibration Failure

Display Message E11

Display Message E33

Display Message E34

Action

ake sure the time of pressing the key is more

than 100 ms.

Check that the batteries are in place, good contact

and correct polarity.

Replace new batteries and try again.

ove the batteries away for one minute and install

again.

Check whether the low battery indicator is on before

the display disappeared. If yes, replace with new

batteries.

Turn on the meter by pressing the + key

to disable auto power off function for long time usage.

Check whether the low battery indicator is on before

the display disappeared. If yes, replace with new

batteries.

ake sure that the sealing is good when plugging the

meter probe into the salt bottle.

ake sure the free air temperature is within 23 ±2°C

(73.4 ±35.6°F) and the airflow is stable.

RH calibration error, re-calibrate.

Circuit error in RH measurement, return the meter to

its dealer.

Circuit error in temperature measurement channel,

return the meter to its dealer.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

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