General DTR900 Bedienungsanleitung

INSIDE-OUTSIDE

THERMOMETER

WITH MIN/MAX MEMORY

USER’S MANUAL

DTR900

Please read this manual carefully

and thoroughly before using this product.

INTR DUCTI N

Thank you for purchasing General Tools &

Instruments’ DTR900 Inside-Outside Thermometer

with MIN/MAX Memory. Please read this user’s

manual carefully and thoroughly before using the

product.

The DTR900 is an affordable instrument that is

accurate enough (±1.8°F) for residential or office

monitoring of indoor and remote temperatures. Its

ability to store and recall two sets of maximum and

minimum temperatures—one sensed by the

display unit (installed indoors) and the other

sensed by a probe at the end of a 6.5 ft. (2m) long

cable—makes the DTR900 suitable for household

use or for monitoring the temperature of a

greenhouse or a food market’s walk-in and reach-

in refrigeration cases. In a food market, for

example, the display unit could be mounted

outside a refrigeration case and the external

sensor could be placed inside the case. In such an

installation, recalled time- and date-stamped

minimum and maximum temperature readings

TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . 3 –4

Key Features . . . . . . . . . . . . . . . . . . . . . . . . 4

What’s In the Box . . . . . . . . . . . . . . . . . . . . . 5

Product verview . . . . . . . . . . . . . . . . . 5 –7

Setup Instructions . . . . . . . . . . . . . . . . 7 – 13

Activate the Unit . . . . . . . . . . . . . . . 7 –8

Choose Your Temperature

Unit & Time and Date Format . . . . 9 – 10

Set the Time and Date . . . . . . . . 11 – 12

Extend and Secure the

External Sensor Cable . . . . . . . . . . . . 13

perating Instructions . . . . . . . . . . . . 14 – 17

Specifications . . . . . . . . . . . . . . . . . . . . . . 17

Maintenance Tips . . . . . . . . . . . . . . . . . . . 18

Warranty Information . . . . . . . . . . . . 18 – 19

Return for Repair Policy . . . . . . . . . . 19 – 20

WHAT’S IN THE B X

The DTR900, including its non-detachable external

temperature probe, is packaged in a box along

with this user’s manual. A single “AAA” battery

with an activation tab is pre-installed in a

compartment accessible from the rear of the unit.

PR DUCT VERVIEW

Figure 1 shows the front of the DTR900. Note the

three separate liquid-crystal displays within one

window (callout 1), the bundled external cable and

probe (callout 2) and the MIN/MAX (callout 3) and

IN/DATE (callout 4) buttons.

Fig. 1. The DTR900 with

its display window in

“normal” configuration

(showing the time and IN

and UT temperatures)

could help the market operator determine the

impact of a power failure on the temperature of

stored food.

The DTR comes in a box along with a non-

detachable external sensor-tipped probe, one

“AAA” battery and this user’s manual.

KEY FEATURES

• Simultaneously displays the time and inside and

remote probe temperatures, or the time and date

and the remote probe (outside) temperature

• Stores and recalls minimum and maximum

inside and outside temperatures with time and

date stamps

• Fast response

• Waterproof exterior probe cable is thin enough to

fit under a window

• One switch selects ºF or ºC temperature unit and

time and date format

• Mounts on a wall or a flat surface

햳햴햵

• The cutouts (callouts 9 and 10) on the bottom

corners of the case, with the external probe

cable threaded through the left cutout.

SETUP INSTRUCTI NS

ACTIVATE THE UNIT

To begin, remove the plastic film protecting the

display. Holding the unit in your hand with the back

facing you, open the battery compartment by

pushing its cover down (in the direction of the

arrow on it) and away from the unit. Remove the

external sensor cable from the large well of the

compartment so it hangs loosely below the unit,

but do not remove the twist tie keeping the cable

in a bundle.

Note from Fig. 3 that an “AAA” battery (callout 11)

is already installed in the battery compartment.

To extend the battery’s life and to protect the unit

from possible battery leakage during storage, the

unit ships with a plastic tab (callout 12) between

the battery’s anode and the metal plate it connects

Figure 2 shows the back of the unit with the

battery compartment closed. Note:

• The °F/°C switch (callout 5) at the top of the

case.

• The two hanger holes (callouts 6 and 7) at the

top corners of the case. Use these to wall-mount

the unit.

• The rectangular recess (callout 8) near the

bottom of the case. Use this recess to raise the

unit’s kickstand for mounting on a horizontal

surface.

Fig. 2.

The back of

the DTR900

with the battery

compartment

closed

햶햸

햺

햹햻

햷

15 seconds, the unit’s software assumes that

the displayed time and date are correct as

shown, so it will stop the display from flashing

and begin operating the unit in dual

temperature display mode. nce the display

has stopped flashing, you cannot set or adjust

an individual time or date field. You must

remove and reinstall the battery and reset all

four fields in order.

CHOOSE YOUR TEMPERATURE

UNIT & TIME AND DATE FORMAT

The position of the °F/°C switch on the back of

the DTR900 (callout 5 of Fig. 2) determines more

than just whether the unit displays temperatures

in Fahrenheit (°F) or Celsius (°C) units. It also

determines the format of displayed times and

dates.

If the switch is in the °F position:

• The DTR900 uses a 12-hour clock and the TIME

display indicates whether the reading is AM or

PM. For example, pressing the MIN/MAX button

to on the right side of the unit (marked by a

+ sign). This tab must be removed by the end

user to activate the unit.

Fig. 3.

The back of

the DTR900

with the

battery

compartment

open

Before removing the activation tab, make sure you

know the current date and have access to an

accurate clock. Once you remove the tab (applying

battery power to the unit), the TIME display at right

will start flashing, indicating that it is waiting for

an input. You will then have 15 seconds to begin

setting the minutes field. You also will have

15 seconds to finish setting each of the three

remaining fields (hour, month and day) in order.

If you allow any field to flash for more than

햽햾

SET THE TIME AND DATE

Flip the unit over in your hand so its front faces you

and note that the minutes field of the TIME display

at right is flashing. Press the MIN/MAX button as

many times as necessary to advance the minutes

reading to the correct value. Then press the

IN/DATE button to store the setting.

Note that storing the minutes setting causes the

hour field of the TIME display to begin flashing.

Without delay, press the MIN/MAX button as many

times as necessary to advance the hour reading to

the correct value (including AM or PM if you have

chosen °F units). Then press the IN/DATE button to

store the setting.

Immediately after the hour setting is stored, the

month field of the DATE display at lower left will

begin flashing. (If you have chosen °F units, the

month field will be on the left; if you have chosen

°C units, the month field will be on the right).

Without delay, press the MIN/MAX button as many

times as necessary to advance the month to the

correct value. Then press the IN/DATE button to

store the setting.

when the display is flashing “11:XX AM”

advances the display to “12:XX PM”.

• The DTR900 will show the date in a “Month-

Day” format (as in the U.S., China and Japan).

If the switch is in the °C position:

• The DTR900 uses a 24-hour clock (also called

military or railway time). For example, pressing

the MIN/MAX button when the TIME display is

flashing “12:XX” advances the display to

“13:XX”.

• The DTR900 will show the date in a

“Day-Month” format (as in South America

and most of Europe).

Move the °F/°C switch to the position you prefer.

Then—if you are prepared to enter the time and

date quickly—remove the tab between the

battery’s + terminal and its connector. This

activates the unit. You must then begin within

15 seconds to…

EXTEND AND SECURE THE

EXTERNAL SENSOR CABLE

To complete setup, the metal tip of the external

sensor cable must be placed in a different

environment than the display if you wish to

simultaneously monitor two different temperatures.

To install the sensor, remove the twist tie keeping

the external sensor cable in a bundle. Then extend

the cable under a window or through a hole in a

wall or frame. Attached to the cable is an -shaped

piece of metal with loops at both ends. Detach this

component from the cable and slip the larger loop

over the white plastic cylinder that serves as a

socket for the metal sensor. Secure the tip of the

cable by placing a nail or screw through the

smaller loop of the metal piece and attaching

it to the frame or apron of a window or door or to

an outside wall.

Immediately after the month setting is stored, the

day field of the DATE display will begin flashing.

(The field will be on the right if you have chosen

the °F setting, and on the left if you have chosen

°C.) Without delay, press the MIN/MAX button as

many times as necessary to advance the day to

the correct value. Then press the IN/DATE button

to store the setting. Once you have stored the day

setting, the UT display at upper left will

automatically begin tracking temperature. Until you

extend the external sensor cable (see the next

section), the UT display will track the inside

temperature, as sensed by the DTR900 display

unit’s internal sensor.

Once you have set the time and date, flip the

DTR900 over in your hand and carefully thread the

external sensor cable first through the cutout on

either side of the battery compartment cover, and

then through the slot in the bottom of the well on

the same side. Then snap the battery compartment

cover back into place, first at the top and then at

the bottom, squeezing the bottom of the unit’s case

to make the cover fit.

To recall time- and date-stamped maximum

and minimum inside and outside tempera tures,

use the MIN/MAX button as follows:

• Press the MIN/MAX button once and the upper

left display will show the maximum remote

temperature measured since the battery was

installed or the unit was reset (see below),

indicated by the words MAX and UT. The lower

left and right displays will indicate the date and

time when this maximum temperature occurred.

The three display readings

will remain on-screen for

15 seconds. After 15 seconds, the three displays

will return to the “normal” configuration.

• Press the MIN/MAX twice (within 15 seconds)

and the upper left display will show the

minimum remote temperature measured since

the battery was installed or the unit was reset,

indicated by the words MIN and UT. The lower

left and right displays will indicate the date and

time when this minimum

temperature occurred.

PERATING INSTRUCTI NS

Once you have installed the external sensor cable,

the DTR900 will monitor both inside (IN) and

outside ( UT) temperatures. This display

configuration—with IN and UT temperatures

shown on the left and the TIME shown at right—

is the “normal” configuration, as shown in Fig. 1.

To switch the IN display at lower left to display the

current date (see Fig. 4), press the IN/DATE button.

Use the IN/DATE button to toggle the display on

the lower left between the inside temperature and

the date.

Fig. 4. The DTR900

displaying the time,

date and outside

temperature

next highest and lowest temperatures measured

since the battery was installed.

SPECIFICATI NS

Inside temperature range: 14° to 122°F

(-10° to 50°C)

Probe temperature range: -40° to 176°F

(-40° to 80°C)

Accuracy: ±1.8°F (±1°C)

Resolution: 0.1° (F or C)

Probe length: 6.5 ft. (2m)

Display window size: 2.53(W) x 0.91(H) in.

(64.3 x 23.1mm)

Unit size: 3.5 x 3.5 x 1 in.

(88.9 x 88.9 x 25.4mm)

Unit weight: 3.76 oz. (106g)

Power source: 1 “AAA” battery

• Press the MIN/MAX button three times and the

upper left display will show the maximum inside

temperature measured since the battery was

installed or the unit was reset, indicated by the

words MAX and IN. The lower left and right

displays will indicate the

date and time when this

maximum temperature occurred.

• Press the MIN/MAX button four times and the

upper left display will show the minimum inside

temperature measured since the battery was

installed or the unit was reset, indicated by the

words MIN and IN. The lower left and right

displays will indicate the date

and time when this minimum

temperature occurred.

To reset (erase) stored maximum and minimum

readings, press the MIN/MAX button and hold it

for at least three seconds. Then press the IN/DATE

button. This will clear the stored Min and Max

values. The display will confirm the reset by

showing this pattern: “--.-”. It will then show the

by non-authorized personnel or misuse, altera -

tions, normal wear and tear, or accidental damage.

The defective unit must be returned to General

Tools & Instruments or to a General-authorized

service center, freight prepaid and insured.

Acceptance of the exclusive repair and replace -

ment remedies described herein is a condition of

the contract for purchase of this product. In no

event shall General be liable for any incidental,

special, consequential or punitive damages, or for

any cost, attorneys’ fees, expenses, or losses

alleged to be a consequence of any damage due to

failure of, or defect in any product including, but

not limited to, any claims for loss of profits.

RETURN F R REPAIR P LICY

Every effort has been made to provide you with a

reliable product of superior quality. However, in the

event your instrument requires repair, please

contact our Customer Service to obtain an RGA

(Return Goods Authorization) number before

forwarding the unit via prepaid freight to the

attention of our Service Center at this address:

MAINTENANCE TIPS

Although the external sensor cable is waterproof,

the display unit is NOT waterproof. Do not install

the display unit outdoors.

To clean the display unit, wipe it gently with a dry

or damp cloth. Avoid using chemical cleaners.

To replace the battery, refer to the Setup

Instructions on page 7.

WARRANTY INF RMATI N

General Tools & Instruments’ (General’s) DTR900

Inside-Outside Thermometer with MIN/MAX

Memory is warranted to the original purchaser to

be free from defects in material and workmanship

for a period of one year. Subject to certain

restrictions, General will repair or replace this

instrument if, after examination, the company

determines it to be defective in material or

workmanship.

This warranty does not apply to damages that

General determines to be from an attempted repair

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