Triplett RHT37 Bedienungsanleitung

User Manual

RHT37

Dual Input Hygro-Thermometer

Psychrometer

Introduction

Congratulations on yourpurchase of theTriplett RHT37Dual Input Hygro-

Thermometer/Psychrometer. This displays humidity, dew point, wet bulb,

temperature and temperature differential. The triple backlit LCD can be

changed to display humidity, temperature, dew point or humidity,

temperature and wet bulb or humidity, temperature and Type K

thermometer. The RHT37 can also display the temperature difference

between Type K T1 and T2 or air temperature and Type K or Type K and

dew point.

Description

METER DESCRIPTION

1. Humidity Sensor & Air Temperature Sensor

2. Triple LCD Display

3. On/Off; Set Mode

4. Min/Max/Average; Reset Min/Max

5. Air, T1, Air-T1, Dew Point

6. T1 probe input

7. T2 probe input

8. T1-T2, T2, T1-Dew Point, Wet Bulb

9. Store Current Reading; Backlight

10. Hold; Recall Mode

11. RS232 port

Note: Battery compartment is located on the rear of

the instrument.

Display Description

1. Air, T1, Air-T1, Dew Point, Low

Battery

2. Temperature °C/°F

3. T2, T1-T2, T1-Dew Point, Wet Bulb

4. Temperature °C/°F

5. Date (month, day, year), Time (24

hour clock)

6. Memory Store/Recall Location

7. Relative Humidity %

8. Maximum, Minimum

9. Hold, Average

Operation

Open the Protective Sensor Cap

Twist the protective sensor cap, located

at the top of the meter, counter-

clockwise a quarter of a turn to expose

the sensors.

Turn Power ON or OFF

Press the [ON/OFF] button to turn

power on or off. The meter will perform

a short self-test when turned on.

Taking measurements

1. Hold the probe in the area to be tested.

2. Allow adequate time for readings to stabilize.

3. The Relative Humidity measurement appears in the right display along

with the date and time.

4. Air Temperature appears in the top left display.

5. Wet Bulb is in the lower left display.

6. Pressing the [T1T/DPSEL]button toggles the top left display

between Air temperature, T1 temperature, Air-T1, and DP

(Dew Point).

7. Pressing the [T2▲WB]button toggles the lower left display between

WB (Wet Bulb), T1-T2, T2, and T1-DP (Dew Point).

SETUP

When the meter is off, press and hold the [ON/OFFSET]button for more

than 2 seconds to enter setup mode. Prnt will appear on the display.

3. Selecting temperature units of measure (C/F)

Momentarily press the [T1T/DPSEL]button until “unit” appears in the display.

Press the [MEM] button to toggle between C or F.

Press the [T2▲WB]button to confirm the setting and return to normal

operation.

1. Setting the Date/Time (24 hour clock)

Press the [T1T/DPSEL]button to select Year, Month, Day, Hour and Minute in

sequence.

Press the [MEM] button to change the settings.

Press the [T2▲WB]button to confirm the date/time setting and return to

normal operation.

Data Hold

Press the [RECHOLD]button momentarily to freeze the displayed reading.

The 'HLD' icon will appear on the upper right-hand side of the display.

Press the [RECHOLD]button again to return to normal operation.

Minimum (MN) Maximum (MX) Average (AVG) Function

The MIN/MAX/Average mode allows the user to view only the lowest (MN),

highest (MX) or average readings. Press the [Min/AVRST]button once and

MN appears on the display. The display is now showing the lowest humidity

and temperature readings in memory. Press the [Min/AVRST]button again

and MX appears on the display. The display is now showing the maximum

humidity and temperature readings in memory. Press the [Min/AVRST]button

again to display the average (AVG) readings in memory. To exit the

MIN/MAX/AVG mode, press the [Min/AVRST]button. To clear the current

min/max/avg readings in memory, press and hold the [Min/AVRST]button for

more than two seconds.

Backlight Display

Press the [Min/AVRST]and [MEM] buttons together to turn on the

backlight. It will remain on for ten seconds.

Automatic Power OFF

With the meter off, press and hold down the [ON/OFFSET] +

[RECHOLD]buttons for more than 1 second to enter auto power off

settings.

Press the [MEM] button to select non-sleep (n) or 2, 5, 10, 20, 40 and 60

minutes autosleep.

Press [T2▲WB]to confirm the selection.

Manual Datalogging

Manual datalogging allows the user to store and recall up to 99 readings with

the press of a button.

4. Press the [MEM] button to manually store a single reading into

memory. The display will flash 3 times and the memory location

number will be displayed below the humidity reading.

5. To view stored readings, press and hold the [RECHOLD]button for 2

seconds and “RECALL” will blink next to the memory location number

on the display.

6. Press the [MEM] button to manually increment through the stored

readings.

7. Press [RECHOLD] + [MEM] for more than 1 second to clear the

memory.

8. Press [RECHOLD]for more than 1 second to return to normal

operation.

Note: In RECALL mode, pressing the [Min/AVRST ] button for min/max/avg

readings will auto search the stored readings in memory and display

the minimum, maximum and average values of the stored readings.

RS-232 PC Communications Interface

The meter is equipped with an RS -232 PC interface jack (3.5mm phono) for

connection to a PC for Data Acquisition.

Specifications

Function

Range and Resolution

Accuracy

Humidity

0.0 to 100.0% RH

±3% RH (10 to 90%)

@ 23

Temperature (air)

-20 to 50

C (-4.0 to

122.0

±1

C (±1.8

Temperature

(external K)

-200 to 1370

C (-328 to

2498

±(0.3% rdg + 1

(1.8

F))

Display

Triple LCD

Sensor Type

Humidity: Precision

capacitance sensor

Internal Temperature:

Thermistor

External Temperature: K-Type Thermocouple

Response Time

60 seconds typical

Dew Point

-68 to 50

C (-90.4 to 122.0

F) (calculated from RH

and Air temperature

measurements)

Wet Bulb

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

RH and Air

temperature measurements)

Low Battery

Indicator

Yes

Overrange

Indicator

E2 (air) E5 (T1), E8 (T2)

Underrange

Indicator

E3 (air), E6 (T1), E9 (T2)

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

4 x 1.5V ‘AAA’ batteries

Battery Life

Approx. 300 hours

Dimensions /

Weight

230 x 57 x 44mm (9 x 2.2 x 1.7”); 153g (5.3 oz.)

Maintenance

Cleaning and storage

1. The meter should be cleaned with a damp cloth and mild detergent

when necessary. Do not use solvents or abrasives.

2. Store the meter in an area with moderate temperature and humidity

(refer to the operating and storage range in the specifications chart

earlier in this manual).

Battery Replacement

When the battery power falls low, the symbol will appear on the

LCD. Replace the four (4) 1.5 ‘AAA’ batteries by removing the rear

battery compartment cover and accessing the battery compartment.

Observe polarity when placing the batteries in the compartment.

Ensure that the compartment cover is securely fastened when finished.

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.

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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