LUTRON HT-315 Humidity Meter User Manual

LUTRON HT-315 Humidity Meter

Model : HT-315

FEATURES

• Humidity + Temperature + Dew point are combined into one meter, intelligent and professional.
• 0.01 %RH resolution for the humidity reading, 0.01 degree resolution for the Temp. reading.
• Pocket size with Separate humidity & temp. probe, easy operation. & remote measurement.
• Fast humidity measuring response time.
• High accuracy and high precision.
• Dew point measurement.
• Manual and auto manual data logger.
• Just few panel buttons, easy operation.
• Microprocessor circuit assures maximum possible accuracy, provides special functions and features.
• LCD with two display, easy readout.
• Heavy duty & compact housing case, designed for easy carry out & operation.
• Records Maximum and Minimum readings with Recall.
• Auto shut off saves battery life.
• Data hold function for freezing the desired value on display.
• RS 232 PC serial interface.
• Show the humidity & temperature values on the LCD display at same time.
• Built-in low battery indicator. Wide humidity & temp. measuring range.
• DC 9V power adapter input socket.

SPECIFICATIONS

General Specifications

Temperature : ℃ or ℉.
Dew point : ℃ or ℉.
Response Time| 5 to 30 seconds typically.

@ Reach the 85% reading value

Temperature Compensation| Automatic temp. compensation for the humidity function.
Data Hold| Freeze the display reading.
Memory Recall| Maximum & Minimum value.
Sampling Time| Approx. 0.8 second.
Power off| Auto shut off saves battery life or manual off by push button.
Data Output| RS 232 PC serial interface.
Operating Temperature| 0 to 50 ℃.
Operating

Humidity

| Main instrument : Less than 85% R.H.

Probe : 0 to 95 %RH.

Power Supply| 006P DC 9V battery

( Alkaline or Heavy duty type ).

@ Battery is included.

Dimension| Main instrument : 135 x 60 x 33 mm,

( 5.3 x 2.4 x 1.3 inch ).

Humidity Sensor Probe :

197 mm ( 7.8 inch ) in length.

Accessories Included| Instruction manual………………….1 PC

Humidity probe………………………1 PC

Optional Accessories| RS232 cable, UPCB-02

Data Acquisition software, SW-801-WIN Case wall holder

Power adapter ( ACV to DC 9V )

Electrical Specifications 23± 5 ℃

Humidity/ Temperature

__

Humidity

| Range| 0 % to 95 % R.H.
---|---|---
Resolution| 0.01 % R.H.
Accuracy| ≧70% RH

± (3% reading + 1% RH).

< 70% RH – 3% RH.

± 3% RH.

__

Temperature

| Range| 0 ℃ to 50 ℃,32 ℉ to 122 ℉.
Resolution| 0.01 degree
Accuracy| ℃ – 0.8 ℃.

℉ – 1.5 ℉.

Dew Point

Remark :

*  Dew Point display value is calculated from the Humidity/Temp. measurement automatically.

*  The Dew Point accuracy is sum accuracy value of Humidity & Temperature measurement..

@ Above specification tests under the environment RF Field Strength less than 3 V/M & frequency less than 30 MHz only.

FRONT PANEL DESCRIPTION

1. Display
2. Power Button
3. Hold Button ( Esc Button )
4. REC Button ( Enter Button )
5. Function Button ( Send Button )
6. Set Button ( Logger Button )
7. Battery Compartment/Cover
8. RS-232 Output Terminal
9. Probe Input Socket
10. Probe Plug
11. Probe handle
12. Probe head ( Humidity & Temperature )
13. DC 9V Power Adapter Input Socket

GENERAL MEASURING PROCEDURE

The meter default value are :

• The temperature reading unit is ℃.
• The auto power off.

Humidity and Temperature measurement

1. Plug the ” Probe Plug ” ( 3-10, Fig. 1 ) into the ” Probe Input Socket ” ( 3-9, Fig. 1 ).

2. Power on the meter by pressing the ” Power Button ” ( 3-2, Fig. 1 ), the LCD shows the unit ” %RH ” & ” ℃ ” at the same time and measured value will show on
   the display ( upper display is Humidity value, the
   lower display is the temperature value ) .

3. The meter Temp. display unit is defaulted to ” ℃ “. If intend to let the meter’s temperature unit default to ” ℉ ” , then please refer section 5-1 ( page 9 ).

Dew point measurement
The procedures of ” Dew point measurement ” are same as the above ” 4-1 Humidity and Temperature measurement ” except select the ” Dew point ” function by pressing the ” Function Button ” ( 3-5, Fig. 1 ) once, the LCD will show the unit ” DEW ” & ” ( or ℃℉ ). The upper display show the Dew point value, the lower display show the temperature value

Data Hold
During the measurement, press the ” Hold Button ” ( 3-3, Fig. 1 ) once will hold the measured value & the LCD will display a ” HOLD ” symbol. * Press the ” Hold Button ” once again will release the data hold function.

Data Record ( Max., Min. reading )

• The data record function records the maximum and minimum readings. Press the ” REC Button ” ( 3-4, Fig. 1 ) once to start the Data Record function and there will be a ” REC. ” symbol on the display.
• With the ” REC. ” symbol on the display :
  • a ) Press the ” REC Button ” ( 3-4, Fig. 1 ) once, the ” REC. MAX. ” symbol along with the maximum value will appear on the display. If intend to delete the maximum value, just press the ” Hold Button ” ( 3-3, Fig. 1 ) once, then the display will show the ” REC. ” symbol only & execute the memory function continuously.
  • b ) Press the ” REC Button ” ( 3-4, Fig. 1 ) again, the ” REC. MIN. ” symbol along with the minimum value will appear on the display. If intend to delete the minimum value, just press the ” Hold Button ” ( 3-3, Fig. 1 ) once, then the display will show the ” REC. ” symbol only & execute the memory function continuously.
  • c ) To exit the memory record function, just press the ” REC ” button for 2 seconds at least. The display will revert to the current reading.

ADVANCED MEASURING PROCEDURE

Before executing advanced adjustment procedures, exit the ” Hold function ” and the ” Record ” function.

1. a. Hold the ” Set Button ” ( 3-6, Fig. 1 ) at least two seconds until the lower display show ” COde “, then release the ” Set Button “, the upper display will show ” 1000 “.

2. 1000 is the password code that allow to execute the Advanced Measuring Procedure following.
   After display show ” COde 1000 “, push the ” Enter Button ” ( 3-4, Fig. 1 ) once will go to the following b. procedures.

3. If push the ” ESC Button ” ( 3-3, Fig. 1 ) will escape the selecting function and return to the normal measuring display.

4. b. One by one to press the ” Set Button ” ( 3-6, Fig. 1 ) once a while to select the two main function that show on the lower display as

5. ℉ ……. Change the Temp ℃, ℉ unit

6. OFF…….Auto power ON/OFF management

Change the Temp ℃, ℉ unit
Use the ” Set Button ” to select the main function to ” ℉ “, then one by one to press the ” Function Button ” ( 3-5, Fig. 1 ) a while will determine the default Temp. unit to ℃ or ℉

• Press the ” Function Button “, if the upper display value show ” 0 “, the default Temp. unit is ℃
• Press the ” Function Button “, if the upper display value show ” 1 “, the default Temp. unit is ℉.

After the function is determined, press the ” Enter Button ” ( 3-4, Fig. 1 ) to confirm and save the selection data into memory IC permanently. Press the ” Esc Button ” ( 3-3. Fig. 1 ) will revert to normal display screen.

Auto power ON/OFF
Use the ” Set Button ” to select the main function to ” OFF “, then one by one to press the ” Function Button ” ( 3-5, Fig. 1 ) a while will determine the default the power management system is Auto Power Off enable or disable.

• Press the ” Function Button ” once, if the upper display value show ” 0 “, it is not Auto Power Off management ( disable ).
• Press the ” Function Button ” once, if the upper display value show ” 1 “, it is the Auto Power Off management ( enable ).

After the function is determined, press the ” Enter Button ” ( 3-4, Fig. 1 ) to save the selection function into memory IC permanently. Press the ” Esc Button ” ( 3-3. Fig. 1 ) will revert to normal display screen.

RS232 PC SERIAL INTERFACE

The instrument has RS232 PC serial interface via a 3.5 mm terminal ( 3-8, Fig. 1 ). The data output is a 16 digit stream which can be utilized for user’s specific application. A RS232 lead with the following connection will be required to link the instrument with the PC serial port.

The 16 digits data stream will be displayed in the following format : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Each digit indicates the following status

If the display reading is 1234, then D8 to D1 is : 00001234

D9| Decimal Point(DP), position from right to the left

0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP

D10| Polarity

0 = Positive   1 = Negative

D11 & D12| Annunciator for Display
℃ = 01| ℉ = 02| % RH = 04
D13| When send the upper display data = 1 When send the lower display data = 2
D14| 4
D15| Start Word

RS232 FORMAT : 9600, N, 8, 1

BATTERY REPLACEMENT

1. When the left corner of LCD display show “ “, it is necessary to replace the battery. However, in-spec. measurement may still be made for several hours after low battery indicator appears before the instrument become inaccurate.
2. Slide the ” Battery Cover ” ( 3-7, Fig. 1 ) away from the instrument and remove the battery.
3. Replace with 9V battery ( Alkaline or Heavy duty type ) and reinstate the cover.
4. Make sure the battery cover is secured after changing the battery.

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