Az-instrument 8708 Manuale utente

8709

Model:

8708

Model:8903/8904/8906

INSTRUCTION MANUAL

PEN TYPE HYGROMETER

8709 KIT

(1) Turn meter on bypressing ON/OFF

button.

(2) Press F/C button to convertreading

to desired range.Bothtemperature

and relative humiditymeasurement

will display simultaneously.(8708)

NORMAL MEASUREMENT

INTRODUCTION

8708

Therm-

Hygrometer

ON/OFF

HOLD

MIN/MAX

TEMP

(F/C)

RESET

MIN

MAX

%HLD

8708

Thermo-

Hygrometer

ON/OFF

HOLD

MIN/MAX

TEMP

(F/C)

RESET

MIN

MAX

%HLD

8709

Therm-

Hygrometer

Congratulation on yourpurchase of

the Pen typeThermo-Hygromter .

This is alow cost buteasy use toget

accurate measurement .

The difference between model 8708

and 8709 isthe latter onefeatures

self-calibration by using0033RH/

0075RH salt solutionto maintain the

meter to geta reading .

The front panelof 8708 withTEMP

(F/C) printing ,instead 8709 without

a button withprinting F/C,CAL .

ccurate

MIN

MAX

%HLD

(1)Power on themeter by pressing

ON/OFF button. You will seea full

display on thescreen ( thoughyou

might have seen"td","WB" shown

on the screen,however these icons

are only availablefor other models)

, then "HLD" icon will disappearin

one second ,thenafter 3 seconds,

the meter willstart measuring the

temperature and humidityand

display both readingsat the same

time.

POWER ON THE METER

(1) Turn meter on bypressing ON/OFF

button.

(2) Use apen tip topress F/C key

whenever you needto.

Press F/C to convert readingto

desired range. Bothtemperature

and relative humiditymeasurement

will display simultaneously.(8709)

READ BEFORE USE

MIN

MAX

%HLD

MIN

MAX

(2) The defaultsetting of temperature

display can bein F or C. You can

press F/C button for 2seconds to

change the temperaturedisplay

from Cto For vice versa. You

may use apen tip topress F/C

button whenever convenient.(8709)

(1) Press andhold MIN/MAX button

until MIN appears on display.

The LCD screenis now showing

the minimum humidityand tem-

perature readings inmemory.

MIN/MAX FUNCTION

%MIN

(2) Press andhold MIN/MAX button

again until MAX appears on

display. The LCD screenis now

showing the maximumhumidity

and temperature readingsin

memory.

MAX

(3) To return tomeasuring mode of

current temperature andhumidity,

press and holdMIN/MAX button

until MIN or MAX disappears from

the display.

(4) To clear currentMIN and MAX

readings from memory, press and

hold RESET button until thefull

display flashes .Themeter reading

turns to thenormal measurement

with either MIN or MAX icon , after

about 10 second,the MIN/MAX icon

will disappear automatically.

DATA HOLD FUNCTION

Press hold buttonuntil "HLD" appears

in display. The currentreading is now

being held andwill not changeuntil

Hold function iscancelled. Press

RESET button to cancelHold function.

Hold function canbe used forHumidity

and Temperature .

%HLD

AUTO POWER OFF

Unit will turnitself off after 20 minutes.

(Sleep mode).To override AutoPower

Off function (Non-Sleep Mode) press

ON/OFF ,MIN/MAX keys simultane-

ously.

After the fulldisplay appears release

ON/OFF button, the displayshows

"n" on thescreen. When "n" appears

then release MIN/MAX button. Unit

will now bein Non-sleep mode.

1. Turn off the meter.

2. Press ON/OFF button. When LCD

displays full readings,press F/C

button with apen tip andthe LCD

shows original temperaturedefault

Cor Fright down thecorner.

3. Press MAX/MIN button to switch

the default Cor F. Press F/C button

to save thenew temperature scale

default and LCDwill first show"S"

then show "%MIN" right upthe corner.

Turn offthe meter.

The procedure iscompleted.

CHANGE DEFAULT OF

TEMPERATURE SCALE

(8709 only)

CHECK AND CALIBRATION

The carrying caseis for notonly

storage (see FIG1)butalso calibra-

tion (see FIG2).

MIN

FIG 1

FIG 2

HR 33 MgCl

TEMP

RH%

ooooo

15 C 20 C 25 C 30 C 35 C

33.30 33.07 32.78 32.44 32.05

(8709 only)

NOTE:

A convenient look-uptable has been

built in toaid calibration.

HR 33 MgCl

TEMP

RH%

ooooo

15 C 20 C 25 C 30 C 35 C

33.30 33.07 32.78 32.44 32.05

If different temperatures, say 25 C,

the RH ofMgCl is 32.78and in 30 C,

the RH is32.44. o

The same referencesays 30 C , the

RH of Naclis 75.09 RH%humidity

and in 35 C , theRH is 74.87%.

(See the table)

HR75 NaCl

TEMP

RH%

ooooo

15 C 20 C 25 C 30 C 35 C

75.61 75.47 75.29 75.09 74.87

The relations arerecorded in thelook

-up table.

Once the calibrationmode in ON, the

meter will searchthe right humidity

value according tothe current temp-

erature to getmore accurate calibra-

tion.

Before checking thehumidity 33% or

75% , makesure you purchasedmodel

8709 and saltsolution 33% (dark

brown bottle) ,75% ( bluebottle ) as

well as thecarry case, ifyou purchased

model 8708 ,it is themodel not avail-

able for checkingor re-calibration .

1.1. CHECK HUMIDITY 33%

1.1.1. Turn on the meter. Plug unit

in 33% saltreference bottle and

put unit intothe carrying caseas

shown FIG2. Checkthe reading

on LCD after40 minutes. Ifthe

display reads between31.5% and

34.5%, that meansthe meter is

accurate. Otherwise, itneeds

to be recalibrated.

Please calibrate themeter by

following calibration instruction

1.3.A.

1.2.CHECK HUMIDITY 75%

1.2.1. Turn on the meter.Plugunit

in 75% saltreference bottle asyou

do in step1.1.1.Check the reading

on the LCDafter 40 minutes. If the

display reads between73.5% and

76.5%, that meansthe meter is

accurate. Otherwise, itneeds to

be calibrated. Pleasecalibrate the

meter by followingcalibration

instruction 1.3.B

(8709 only)

1.3.CALIBRATION

A. CALIBRATION FOR

RELATIVE HUMIDITY 33%

1. Turn off the meter.

2. Press ON/OFF button. When LCD

displays full readings,press F/C

button after pluggingthe meter in

the 33% saltreference bottle for 40

minutes(you have donein 1.a).

3. Press RESET button and theLCD

shows " %MIN ".

4. Press F/C button to savethe cali-

bration value of33%. The LCD

shows "S" for 2seconds and then

the "%MAX" shows rightup the

corner of LCD.

5. Turn off the meter. Thecalibration

of 33% iscompleted.

MIN

MAX

B .CALIBRATION FOR

RELATIVE HUMIDITY 75%

1. Turn off the meter.

2. Press ON/OFF button. When LCD

displays full readings,press F/C

button after pluggingthe meter in

the 75% saltreference bottle for 40

minutes.( you havedone in 1.2.1)

3. Press RESET button twice andthe

LCD shows "%MAX" .

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