Triplett RHT32 Bedienungsanleitung

User Manual

RHT32

Digital Psychrometer

Introduction

Congratulations on your purchase of the Triplett RHT32 Digital

Psychrometer. This unique meter designed as pocket size, battery operated

for Humidity, Dry Bulb, Dew Point, Wet Bulb, External Temperature &

Temperature Differential measurement. The sensor is also specially

protected by protective turn cap.

The psychrometer is a micro processor-based design. A must device for

HVAC engineers use.

Description

METER DESCRIPTION

1. Power On/Off Button

2. °C/°F Button, Switch

between °C and °F

3. MODE Button, Switch

between Db & DP (Db=Air

Temperature)

4. HOLD Button

Hold display

Power Button +

HOLD = Non-Sleep mode

(The default setting is auto-sleep

in 5 minutes)

1. RESET Button,

Reset Min/Max memory

2. MN/MX Button

Display minimum value of

memory from when the

meter is turned on to now.

Display maximum

value of memory from

when the meter is turned

on to now.

Operation

Sensor Protective Cap

Turn the protective cap (top of

meter), in the direction of the OPEN

arrow to allow air into the sensor

cavity. Turn the cap in the direction

of the CLOSE arrow to protect the

sensors. Always open the cap to

take measurements and close when

storing.

Meter Power

Press the power button for one second to switch the meter ON/OFF.

The meter will perform a short self-test when switched ON.

Auto Power Off (Sleep Function)

The meter will turn itself off after 5 minutes.

To override Auto Power Off function, press + HOLD while the meter

is off. When "n" appears (see figure A), release the HOLD button. The

meter is now in Non-Sleep Mode.

Figure A

Mode Options

1. Turning on the protective sensor cap in counterclockwise direction.

2. Turn meter on by pressing power button (see figure B).

3. Press C/F key for more than 1 second to convert reading to

desired unit. Both the temperature and relative humidity

measurement will display simultaneously (see figure C).

Figure B Figure C (requires optional brobe)

Data Hold Function

1. Press "HOLD" button until (HLD) appears in display.

2. The current reading is now held and will not change

until the Hold function is cancelled (see figure D).

3. Press "HOLD" button again to cancel the Hold function.

Figure D

The Hold function can be used on

humidity, dew-point, dry bulb/T1, external

temperature/ T2, wet bulb and

temperature difference.

Dew Point Function

1. Press MODE button until "DP" appears on display.

2. Select to display dew point or dry bulb (air temp.) in any mode

while the unit is on (see figure E).

Figure E

Figure E1

Wet Bulb Function

Turn the meter on by pressing power button.

You will see "Wb" temperature indicated on the display (see figure E1).

External Temperature Function

1. Plug the optional external probe into the meter.

2. Press the RESET button until "Ex" appears on display.

The meter will now display external probe temperature. See figure F.

Figure F

Note: If the probe isn’t plugged in

meter, "Ex" won’t appear on display

even when pressing the RESET

button.

Min/Max Function

1. Press and hold MN/MX button until (MIN) appears on the

display (see figure G). The display is now showing

minimum humidity and temperature readings currently in

the memory.

2. Press and hold MN/MX button again until (MAX) appears on the

display (see figure H). The display is now showing maximum

humidity and temperature readings currently in the memory.

3. To return to the current temperature and humidity

readings press and hold the MN/MX button until Min or Max

disappear from the display.

4. Press the RESET or the MN/MX button for more than two

seconds to clear currently in the memory.

Figure G

NOTE:While checking the MIN/MAX value for "Ex" don’t replace

the probe or you will get an error code. If you don’t plug the probe

into socket before turning the meter on, the error code will also

appear when you check the MIN/MAX value.

NOTE: Low battery power tends to give inaccurate readings,

therefore make sure you have enough power.

Calibration

WARNINGS

• You can exit the calibration procedure without saving the data in

the memory by pressing the "ON/OFF" button before step 4. During

step 4, press the "ON/OFF" button to exit the calibration mode.

• Auto power off is disabled in calibration mode.

• For the highest accuracy, the calibration should be operated at

23°C.

• If the reading is out of 75.3% 0.5% at step 4, this indicates the

calibration has failed. See troubleshooting section below.

1. Turn the meter off and plug the sensor probe into 33% salt bottle.

Press the "ON/OFF + C/F " buttons for more than one second to

enter calibration mode.

2. "32.8%" will flash on the display, when "---.-" is showing on the

display, that means the values are invalid in the calibration process.

After 30 min, the flashing will stop to indicate the procedure is

finished.

3. Move the sensor to 75% salt bottle and press "MN/MX" for more

than one second to enter 75.3% calibration. "75.3%" will flash

on the display.

4. The flashing will stop after 30 minutes, at this point the

entire calibration is completed and the calibration data

has been saved in memory.

Maintenance

Cleaning and storage

5. Clean the meter housing with the sensor cap closed, using a

lightly damp cloth and mild detergent when necessary. Do not

use solvents or abrasives.

6. Store the meter -- with the protective cap closed -- in an area with

moderate temperature and humidity (refer to the operating/storage

conditions specifications).

Battery Replacement

When the batteries need replacing, the symbol will appear on the

LCD. Replace the two (2) 1.5 ‘AAA’ batteries in the rear battery

compartment, observing correct polarity.

Never dispose of used batteries or rechargeable batteries

in household waste. As consumers, users are legally

required to take used batteries to appropriate collection

sites, the retail store where the batteries were purchased,

or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste.

The user is obligated to take end-of-life devices to a designated

collection point for the disposal of electrical and electronic

equipment.

Other Battery Safety Reminders

Never dispose of batteries in a fire. Batteries may explode or

leak.

Never mix battery types. Always install new batteries of the

same type.

Error Message Displays

1. ER1: Relative Humidity measurement failure. Have the meter

repaired or replaced.

2. ER2: Internal temperature circuit failure. Have the meter repaired or

replaced.

3. ER3: Reference resistance failure. Have the meter repaired or

replaced.

4. ER4: Internal temperature sensor measurement is out of range.

Always measure within the published specified range.

5. ER5: External temperature sensor measurement is out of range.

Always measure within the specified range of the external

temperature sensor.

Specifications

Range and

Resolution

Accuracy

Humidity

0.0 to 100.0% RH

±3% RH (10 to 90%) @ 23oC

Temperature (internal sensor)

-20 to 50oC (-4.0 to

±1oC (±1.8oF)

122.0oF)

Temperature (external

-20 to 70oC (-4.0 to

±1oC (±1.8oF)

probe range)

158.0oF)

Display

Triple-reading LCD

Sensor Types

Relative Humidity: Precision capacitance sensor

Temperature (internal): Thermistor

T2 Temperature probe: Thermistor

Response Time

60 seconds typical

Dew Point range

-68 to 50oC (-90.4 to 122.0oF) (calculated from RH and air

temperature

measurements)

Wet Bulb range

-21.6 to 50oC (-6.88 to 122.0oF) (calculated from RH and air

temperature

measurements)

Operating Conditions

-20 to 50oC (-4 to 122oF); < 99% RH non-condensing

Storage Conditions

-40 to 85oC (-40 to 185oF); <99% RH non-condensing

Power Supply

2 x 1.5V ‘AAA’ batteries

Battery Life

Approx. 80 hours

Dimensions / Weight

178.5 x 48.8 x 25.2mm (7.0 x 1.9 x 1.0”); 140g (4.9 oz.)

Warranty

Triplett / Jewell Instruments extends the following warranty to the original purchaser of

these goods for use. Triplett warrants to the original purchaser for use that the products

sold by it will be free from defects in workmanship and material for a period of (1) one

year from the date of purchase. This warranty does not apply to any of our products

which have been repaired or altered by unauthorized persons in any way or purchased

from unauthorized distributors so as, in our sole judgment, to injure their stability or

reliability, or which have been subject to misuse, abuse, misapplication, negligence,

accident or which have had the serial numbers altered, defaced, or removed.

Accessories, including batteries are not covered by this warranty

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