PRO-TEK 608 User manual

608
50000 Count Digital Multimeter
Protei<

TABU! OF CONTENTS
1-1. MAIN FEATURES 4
._-_._,_ .
._ -- -_ . __ .. _--
._ ....... 1 . ~ FRO~.T.P.ANEL OESCI1I~!I!!I(lCO . KEY.ROTARY.SOClEI) 5
1-3. REAR PANEL OESCRIPlION(RS232C.TlU·STANO.BATTERy) I
tMODJ.!!fY Ol'.ERAflD L ____. ______ .____ J
LI!PE~I1.!lL ___ .. ___ .. _ H PO W.!11 _ 0 !li~ . ____ . _________ I _.
H OCmV . OCY I
._._ ._ .. ._._ ... _... .... • ... _ .• ...•... .. . __ ...... . __ .__.. !: .3
c
AC mY,.A. CY . AC + OC mV .A C+ OCV
II
--_._----
3·4. DCuA.OCmA.DCA 1•
. 3· 5. ACuA.ACmA . ACA . AC + OCuA .A C+.O_ CmA.Ai:. . :+: . OEA __ l_l .
_.
__ ._ .. _. ____ . _____ • __ ._ .l . c!c _ ohm. CONTlN .U!l!!I'.hm 11
3·7. nS 12
-------_ ._ ._._ -_ .. _--_.
____ __ ._ ... •._ .•.. . _. __ .. .• ... _._ ..... _ ... • ... _ . .l,8.J!,N_ ER _ ol!'f1 ._ E_ .. . __ _
12
H CAPAC1TANCE 13
---_._ .. _-----------
3·10 . Hz
14
--_ ._ -_ . 14
15
3·11.P ULSE WIDTH
=~ --~~~---=- 3 ..c 12 . TEMPERATURE
4"llt2.~lC INU~JA!;L _ ..... ___ ~ ·1. CONNECTIO N BETWEE N PC & METER
11
4-2. RS232C CABLE & PIN CONNECTION 1i
4·3.C OMMUNICATlON SPEC. 1i• • • H ••• _._._ •• ___ .. __ .. _. ___ • __ • ____________ ___ • _______ _
4 ... INSTAllATION
11
4·5. OPERATION 11
~. SPECI.~L FU.!l.I;!IDN D~~.~IPT.!I! !L . ~ . ~ ., AUm~F.F __ . _____ ._ .___.._... ___ .. __ . •. _ .. _'_I_ ..
__ ..::. 5.2 _.L_ OW _B_ ATT _ E_ RY _I_ NO . ICATlON 11
5· 3. BAR GRAPH DISPLAY 11
-_ ...... _--_ ._- ------_._._- ----_._--- - --_._---,
_._ .. _ ...... _._._ .. _____ ._ .. __ . ____ ..._ .. 5 :!.!o!_~. I'! .. . ..... _ .... _ ... _. ___ ._ •..•..•. __ !!...
5·5 . ± PEAK
11
5·6. AVERAG E
-.. --.--- . ---.- ~~"'-- -
5·). GOiNG
II
.. __ .... .-
II
21 5·B. STORE
5·9. RECAU 21
iCM AINTENANCI ------- - &:"I-:--G - EN - ERAl -··-··-- .. -- .. ---·-- .. · ·-·· .. -·-·--- ZI-·
. __ . __ .
6·2. BATTERY REPLACEMENT 21
_ .H .. . __ ... _ ... _ __ _ ___ ___ __ .... __ . ____ _ __ ... _ __ _ .. __ __ .H .. ... __ . __ .. _ .... .. __ ._._ .. • ___ •_ ___ ..._ ..... ___ __ _. ... __ •_ _. ____ ..__ .. _" _H. __ _
6 ·3. FUSE REPLAC EM EN) ZZ
._-- -- -- -_ ._---- -_. __ ._------------------_._---_._---
H CAlI8RATIO N 23
2)
7-2 . ElECTRICAL SP E CIFICATI ", ON ,== __ .
)·3. RANGE SWITCHING BY FUNCTIONS 33
_ •• ___ •• H. __ _ . . ....... ____ ••• _._ . ___ ............... _ . . . . .. __ ._'" . __ • ____ • ____ .~ ___ • • _._ ...... __ ._. __ . _._._
7-4 . MODE SElECTION BY fU NCT IONS 34
------ .-.------- ... - ... - ...... ---- .... - .--- .~ --.-.-------._. __ ._ -_ .. _.._ .. _._ ._-_._._-
)·5. SPECIAL SYMBOLS ON LCD
15
)·6. lCo STAT US BY FUNCTIONS 11
... _....- ...• _._ ... - ._ ... _._. __ ._ ...... - ~-- ... -.- . -- .- .---- -.-.--- .. .- .. - .. - -- .. -.
H LCD STATUS BY M ODES 3)
)·B . ASSEMBLY DIAG "R"A ", M ,- ______ _
)·9. SAFETY .
)· 10 . REPLACEMENT PARTS LIST
11
4Z

IN11IODUCT1ON
4
o INTRODUCTION
I-I. MAIN FEATURES
1) 0.05% basic accuracy, 50,000 count resolution with SOms sampling time
featuring 4th order delta-sigma analog to digital conversion and a var-
iety of useful functions makes the 608 by far the best hand·held DMM
available today.
2) DCm V measurement function has 0.05% accuracy and more than
IGigaohm of input impedance. A wide 0 to 2500mV full scale measuring
range with a Resolution of 10 uvolts enables accurate and precise meas-
urements.
3) Large LCD with 67x47mm of viewing area, a dualS digit display, 54 an-
nundators and An Electro-luminescentback light with an innovative
bar-graph based on binary bit expression, which gives immediate perc-
eption of minute changes in signal levels and an easy understanding of
binary code.
4) Zener diode function for testing Zener diodes from 0 through more
than 15V, together with low voltage ohm & conductance (nS) test func-
tions, provides very easy and powerful circuit analysis ability in electronic
test and measurement work.
5) Pulse width, Duty cycle & Hz measurement functions, used together
with otherbasic functions, provides very useful testing ability in appli-
cations such as automotive testing etc. .
6) 10 locations of nonvolatile EEPROM permanently stores data without
a backup battery or applied power.
7) Auto power off function for saving energy.
8) Designed for safety and to prevent electrical shock.
9) Holster for rugged use is included.
10) RS232C computer interface enables data to be captured and transferred
to a PC for processing and storage.

INTRODUCTION
1-2. FRONT PANEL LAYOUT
[O .... Q .... Q .... Q·>-~ ++-- MODE KEY SELECTION
10000i
·c· .. ~ .. ;;i ~ ' . ~;/~s . 'H; ;PW" •••••••••• '
, lVO ,.. / Temp
,..~
-tt-="'-; '+II -- ROTARY SWITCH
FOR SELECTING MEASUREMENT
FUNCTION
5

6
'-3 . REAR PANEL LAYOUT
=
=
=
=
=
=
=
@ 0
.---------if- .. 11(11 lUI
<>-H~--+-- 1T(PIIOT1I TIl
-++--+- ..... IS2lZC UIIf HOllO
-II=~- .. STAID
=
=
=
=
=
=
IATlUY COVEl
_RIOT

.6
MODE KEY
OPERATION
WARNING
READ THE 'SAFETY" IN APPENDICES BEFORE USING THE METER.
fJ MODE KEY OPERA nON
2-1. HOLD
This key when pressed 'freezes' the measurement reading on the LCD,
no further updates to the LCD display will happen and the HOLD ann-
unciator turns. Pressing the HOLD key again restores the DMM to normal
operation.
2-2. REt
The relative mode allows the operator to measure values with respect to
a reference value other than zero.
The relative value is computed by the
equation: Relative = measured -reference
Pressing the REt key enters the measured value on the LCD as the refe-
rence and displays the REL annunciator. Pressing the ENTER key only
while in the
REL mode updates the Reference Value .
-Press the REL key to en ter the measured value on the LCD as the relative
value and to display the
REL symbol.
Pressing the REL key again releases the relative mode and returns the
DMM to the normal
mode ofoperation
~ 1) The REL mode can only be used for numerical data; it cannot be used for con-
tinueinuity, which displays open or short instead of numbers.
2) The REL mode is especially useful for low ohms measurement, which requires
the test lead resistance to be cancelled.
2-3 . LIGHT
Pressing this key turns on the LCD backlight; pressing the back light key
again will turn it
off. In order to conserve battery power the backlight will
automatically shut off30 seconds after it is turned on.
7

8
MODE KEY
OPERATION
2-4. MENU
Pressing this key places the meter in the menu mode. Pressing this key
again the meter will ex it from the menu mode and return to the previous
operation.
Once the meter is in the menu mode , an the menu annunciators appear
on the upper portion of the LCD with the flashing cursor over one annu-
nciator. To select the desired menu item, press the Left or Right (or) keys
until the flashing cursor is over
the desired annunciator, then press the
ENTER key to select. The exception to this procedure is the GO/NO Testing
function, which
is explained in detail in chapter 5 sections 5-7 of this manual.
2-5. ALT -F
This key is used for selecting the alternate functions, which share the same
position
on the rotary function switch (e.g. HzlPW). When the Function
selector switch is rotat ed to this position the default function is HZ. Pressing
the ALT·F function key will select PW (pulse width)
2-6 . LEFT
This key is used to select the manual range mode and shift the present
mea su rement range one decimal place to the left. Each time this key is
pressed the decimal point will
sh ift one place to the left. Pressing this key
in the Menu mode will cause the blinking cursor to move to the left.
2-1.RIGHT
This key is used to select the manual range mode and shift the present
meas urement range one decimal place to the right.
Each time this key
is pressed the decimal point will shift one place to the
ri ght. Press ing this key in the Menu mode will cause the blinking cursor
to move to the right.
2-8.ENTER
Pressing the ENTER key executes the function se lected by the Right and
Left Keys as de scri bed above in the menu mode . When pressed, the blin-
king
annunciator will stop blinking and all the other menu items will dis-
appear If how ever, the "A UTO OFF" and " RS232C" annunciators had been
selected previously they will remain on the LCD. Another important fun
ction of this key is to restore the power to the meter after AUTO POWER
OFF has occurred.

OPERATING
~ OPERATING
3- 1. POWER ON /OFF
When not used for very long time (a few months, etc), it would be better
to shut off the unit with the function selector switch instead ofdepending
on th e auto power off, which draws about 70uA ofbattery consumption,
or about S months of battery lifetime with commo nl y used types of 9Y
ca rborv'zin c batteries.
When the power switch is turned on, all the segments on the LCD display
will appear (see Fig 1 on page 36)and the bui lt in buzzer in the meter will
so und for 1 second and then normal operation will be started and measur-
ements
may be now be obtained according to what the rotary function
selec
tor switch has been set to.
3-2. DCmV and DCV
1) Rotate the rotary selector switch to the mY or Y position. The LCD
screen wiU appear as shown in fig Nos. 2 and Son page 36 of this manu al.
If the alternate mode (AC or AC+ DC) has been select ed (as indicated
by the LCD Annunciators) press th e ALT-F key to select DC.
2) Co nne ct the red and black test leads into the correspondingcolored
input sockets and then connect
the probe e nd of the test leads to the
vo ltage so urce to be measured.
3) The LCD will display the measured value along with the corresponding
bar
graph value.
4) If the measured voltage is too high , the "OL"will appear. In this case,
immediately remove the probes from the voltage source and determine
the
ca us e of the ove rload,
S) The secondary or lower display will indicates the meter's input impedance
value
-
.-----"<""--
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Dire ct Voltage Test
9

&
Ol'ERAnNG
3·3. ACmV, ACY, AC+DCmV, AC+DCV
1) Rotate the Rotary se lector switch to mV or V position, and then pr es s
the ALT- F key to display the AC annunciator on the left side of the LCD
see fig. 3 & 6
on page 36) Pressing the ALT -F key again will display the
annunciators for both AC and DC lhis is for the AC + DC true RMS mode.
Pressing
the ALT-F key 3 consecutive times will cycle th e meter through
the 3 voltage modes (DC, AC, AC + DC)
2) Attach
the probe tips to the voltage source.
3)
The voltage measur eme nt will appear on the display.
4)
The Bar graph will display the voltage va lue as a binary bit expression.
S) H the measured voltage is too hig h, the measurement range will be
changed automatically to the next higher range. When the measured
voltage is greater than the highest range the display will read " OL ".
6) Th e secondary digit display will read the decibel value based on 600
OHM ifrlpedance calculated by the following formula.
dBm =20 log(V1 0. 7746)
3·4. DCUA,. DCMA, DCA
1) Select uA, rnA or A with the rotary switch.
2) Press
the ALT-F key to se lect DC if necessary.
3) Break the circuit where the current i~ to be measured.
4) Connect the two test l ea ds to complete the broken drcuit.
S) If the measured current is too high, th e display will indicate "OL".
In this case, the higher current range (rnA or A) should be selected.
6)
The bar-graph segments will indi cate th e measured val ue as a binary
sequence.
7) Th e secondary display will show the shunt resister value for calculating
the insertion voltage drop caused by meter using the formula V= IR .
&. 8) The "A" input socket has a special function designed for safety, which is
called
the "WARNING BEEP". When the rotary switch is set up to any
function other than the "Am ps ", inserting the te st leads in the "Amps"
socket will cause the warning beeper to sound.
The itA (Amp)" input terminal allows current measure ment continuously
up to SA or within 3 minutes for currents to lOA. Successive high current
measurements above SA require 10 minutes of cooling time between
measurements.
WARNING
DO NOT MEASURE HIGH CURRENT OF MORE THAN lOA TO AVOID
OPENING THE FUSE OR OVER HEATING THE PCB
10

'.
OPERATING
~
--
nnnn"..
Current
-UUUUU · Source
.....
idci :
8gg9
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\~
II
3-5. ACuA ACmA ACA AC+OCuA, AC+OCmA AC+OCA
1) Select uA, rnA or A with the rotar y switch. Press the ALT-F key once
to select the
AC m ode .. Pressing th e ALT-F key again selects the AC+DC
True rm s mod e.
2) Use th e same pr oce dure as described in section 3-4
(DC c ur rent m eas ureme nts)
3-6. Ohm, CONTINUI TY, Lo Vol' ohm
1) Rotate th e rotary selector switch to the OHMS position.
2)
If the test l eads are opened th e display w ill read "OL".
3) Shorting the test leads will disp l ay zero or an extremely low val ue
Re sistance value, this is th e test lead resistance.
4) Relative
mod e is us eful to cancel this error by subtracting the test lead
Resistance from
the m easured resis tan ce.
S) The seco
nd ary display reads 2.5V if normal O hms measurement has
been selected,
O.2SV if Lo Volt Ohms has been selected. These voltage
values are
th e open circuit test voltag e. If continuity is selected, the
measured resistance va lue is displa ye d on the secondary display.
6)
One of th ese 3 functions may be sel ected by pr essing the ALT-F key
until the desired a
nnunciator is displayed on the l ower left of the LCD.
7) . The continuity function is useful for check ing for open or short circuits.
The resistance value is read on the secondary dispJ ay whil e the main
display reads
either "OPEN" or "S HORT ". The buzzer will sound when
th e displ ay reads "SHORT'. Pressing th e LEFT or RlGHT key while in the
co ntinuity function increases or decreases continuity measure ment range
there by increasing or decreasing
the resistance value, which turns the
bu
zzer on or off. .( See continuity specifications in the Appendices)
11

12
OP£RAnNG
8) La Volt Ohms function is useful for accurate resistance measurements
in a circuit, which includes semiconductor devices. There is no need to
remove the resistor or semiconductor device from the circuit.
~
.. U.l ~
l1'5 .
8888
"~
I~~
-'[.1 .-
I
Resistance Test
3-7. nS (Conductance)
1) Rotate the function selector switches to the capacitance/nS position.
Press the ALT-F key once to select the nS (conductance) function.
2) The secondary digit display reads the resistance value of the measure-
me nt in Gigaohms, while the primary display reads the conductance
value in nanosiemans which
is calculated from the equation,S = tJR.
This measurement function is very useful f~r checkingextremely high
resistances or leakage properties of insulation materials etc.
3-8. ZENER DIODE
1) Rotate the function selector switch to the Ze ner diode/femp position.
The Zenerannunciator will appear on the lower left of the display.
2) With the test leads open the primary display will read about 2OY, this is
the maximum
open circuit test voltage. The secondaty display will read
lmA, the constant t.est current.
The Zener diode function is very useful for analyzing complex circuits
that include semiconductor devices such as
les, transistor, Zener etc.
The Zener diode function has a test voltage much higher than the test
voltage in the diode test ~ which is commonly seen, in most digital mul-
timeters. This function along
with Lo Volt Ohms function makes this
instr
ument a powerful tool for various electronic circuit analyses.

OPERAnNG
3) Connect th e blacklead tip to the anode of th e Zener diode under test
and the red lead tip to the cathode . The Zener voltage will be displayed
on the LCD. For diode test, connect the black lead tip to cathode of diode
and the red lead tip to the anode . The diode 's forward voltage drop will
be
di splayed on th e LCD.
3-9. CAPACITANCE
1) Rotate the fu nction selector switch to the ca pacitance po sition.
2) Discharge the capacitor to be measured.
3) Co nne ct the test lead tips to th e capacit or. No te: capacitors must be
me asured out of the circuit.
If th e capacitor to be meas ur ed is an electroly ti c type with polarity, the
Re d test lead should be connected to + lead of ca pacitor and the black
to - lead of capacitor.
+"
--
"
aaaa ··
-
···· ·· 8 '
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13

14
Ea TIrt seamdmy disp/JJy muIs 1M Itst oolbJge tJIIll 1M CJJpOCiIDr /IllS drargetI
to in flUs ~ 1M tIG!ue is 2.5Y. TIrt azpaciIor is tJrm discJrJuged through
altSistor cin:uitwith TIfllvts from 1.5k ohm to 1Megohm dep<nding on
1M 1IIlJJS1lmrrmt rtmge.
3- JO. Hz
1) Rotate the rotary function switch to the Hz position.
2) Aitach
the test lead tips to signal source to be measured.
3) The main display will read the measured frequency.
4) Secondary display will read the AC voltage of the signalsource: The
voltage range of the secondary display is 0 to 500V with 10m Vof resolution.
5) The AC voltage isspecified to 20 kHz ass hown on the AC mV & V spe -
cifications on page 27. When the measured frequency exceeds 20kHz,
the secondary displayis no longer useful due to the attenuation of the
signallevel.
nnnn
uuuu
3- ll . ±PULSE WIDTH
Frequency Measuremmt
1) Select HzIPW with rotary switch. Press the ALT-F key once -for positive
pulse width measurement or twioe for negative pulse width measurement
2) Connect the test lead tips to the signal source to be measured.
3) The main display will read the measured pulse width .
4)
The secondary display reads the percent duty cycle.

OPERATING
3-12. TEMPERATURE
1) Rotate the Function selectorswitch to the Zener diode/femp position.
Press the ALT-F key once for Centigrade, or twice for Fahrenheit meas-
urement.
2) Connect the temp adaptor to the meter VI rnA/ COMN input sockets as
shown in the figure below. .
3) Connect the thermocouple (K type) to the temp adaptor, observe the
polarity.
4) Allow at least 10 minutes for connectors of temp 'adaptor to be stabilize-
zed for accurate measurements.
5) If no thermocouple is connected to the temp adaptor, the ambient
temperature around the adaptor will be measured and displayed.
6) The main display reads the temperature in Centigrade or in Fahrenheit,
while the secondary display reads the absolute temperature in degrees
Kelvin .The Following formulae are used for temperature calculation.
OOK=-273.1°C 0°C=32°F 100 °C=212°F
['t]=[ oK].273.1 [OF]=[°C]x9/S+32
The meter actually measures only the Kelvin degrees \I()and calculates
the Centigrade and Fahrenheit temperature ("C,OF)from the above
equations.
7) The Temperature adaptor and thermocouple produces ImV per eK at
the output terminal marked
"V". The meter reads 1"1< per mV at the "V"
input terminal and 0 OK for a OV input. Therefore lo:xJ"K is an input signal
of 1V This meter can measure the applied voltage at V terminal with an
accuracy of0. 05 % for an inputs of OV through 2.5V Therefore the total
accuracy depends upon the accuracy of the temperature adaptor and
thermocouple.
15

RSZ32C INTERFACE
D RS232C INTERFACE
4- I. CONNECTION BETWEEN PC AND.MfTER
Connect the RS232C cable to the built-in RS232 connector in the meter
and to the PC serial port.
16
4-2. RS232C CABLE & PIN CONNECTION
COMPUTER
RS232 ADAI'I'OII
[9PJN D-SUB) [SPIN
WAFER)
'OCD~
2.RX ---
f2=
3.TX ---
1. RX--IT
4.DTR 2.TX
-- IR
S.GND -- l I
3. CTS
6. DSR L
t- I-
4.DTR
7. RTS 5.GND
8.CTS
9.Rl
4-3. COMMUNICATION SPEC.
. BAUD RATE: 9600
- DATA BIT: 7
-
STOP BIT: 1
. PARITY: NONE
DMM
[PHOTO COUPLING)
~
IR(IR LED)
IT(IR DETECTOR)

Rsn2C INTERFACE
4-4. INSTALLATION
The supplied software programs
run on mM PC compatiblecomputers
only.
1) Insert the supplied CD ROM into the drive.
There are 2 files
on the CD ROM labeled:
WIN 95_98
WIN 3_1
2) Type in th e following statementfrom the run command line selected
from the
START menu if your computerhas the WIN95 or WIN 98
operating system 0: lsetup95\setup.exe (Press enter)or double click
the My Computericon
on the Wmdows Desk top and click on the
0: CD ROM drive icon then click the setup file.exe Icon.
3) If your operating system in your computer is WIN3.1, then type in
the following statement
in the RUN dialog box.
0: lsetup3 _1 Ise tup .exe
or double the click CD-ROM icon on the file manager then select set
up 3-1 to execute setup.exe
4) Follow the message on the monitor screen.
Refer to the RS232 manual and the read-me file for further details.
4-5. OPERATING
Refer to the help file on the supplied diskette for operatingprocedure.
17

SPECIAL FUNCTION
DESCRIPTION
E1 SPECIAL FUNCTION DESCRIPTION
1B
5- I. AUTO OFF
This Feat ure is used for conservi ng batter y po wer . When the meter is le ft
on for more th an 15 minute s with out pre ssing keys or rotating th e rotary
sw itch the meter will s hut off (go in to Auto p owe r off status). The meter
can be restarted by pressing the ENTER key or turning the rotary switch
to the off po sition and then back to its original position. This feature can
be disabled by selecting the Auto off annunciator from the menu and then
press the e nt er Key. The Annunciator will djsappear from the LCD. This
is the continuous use mode; the meter win opera te until the battery is drained.
5-2 . lOW BATTERY INDICATION
A Battery symbol app ears on the di splay when the battery voltage falls
below 6±lV to the Battery symbol warns th e user to replace the current
battery with a new one.
5-3 . BAR GRAPH DI S PLAY
This meter ha s an inn ovative style of bar graph based on binary bit expr-
ession that w ill ind icate a cha nge no matter h ow small has occurred in the
signal l eve l through an easy to und ers tand binary code. The bar -gr aph
segments correspond to the numerical value of the main display's reading.
As the
input measurement increases, the bargraph seg ment s will increase
in a binary sequ ence
For Example:
:- .......................... ~ 1
. __ - - - - II I:
• 1 24'1114 251 u: .... 1111 •
• ••. ...•......•...............•
1 +4+ 16+128+1024 +8 192 +3 2768= 42133 is shown on the main display .
5-4. MAX/MIN
The MAX or MIN capture mode stores the highest or lowest of the measured
valu es into memory and displays them on th e main display. The meter
can cap tur e and hold signal le ve l c hange s lOOmS or greater in duration.
If a sho rter cap tu re time is required, use th e peak detection mode.
To display the MAX or MIN values,
1) Press th e m en u key
2) Press the Right or Left key to move the blinking cursor to the MAX or
MIN .
3) Press the ENTER key to select and start.the MIN or Max capture. To
clear the pr ese nt value of MAX or MIN or restart th e capture mode ,
press the ENTER key.

SPECIAL FUNcnON
DESCRIPTION
5-5. ± PEAK
The peak detection mode is for capturing high-speed changes in signal
level of5mS
or greater in duration. This mode is available only in DCMY,
ocv,DCUA, DCMA and DCA. To use this mode press the menu key and
move the blinking cursor to + Peak for positive signals or Peak for negative
signals
with the Right or Left keys then press ENrER. To clear the present
value
of the peak or to restart the peak detection mode, press the ENTER
key only.
5-6. AVERAGE
The AVG function mode is useful for measuringa signal, which contains
ripple, noise or fluctuations Strictly speaking; this AVG function is diffe-
rent from the average by mathematical definition. More exactly it is a
smoothing function, which reduces changes due to ripple or fluctuation
by 100 times from the following calculation:
AVG = [sum of previous 100 data measured] / 100
5-7. GOING
The GOING function provides an easy way to determine if a readingfalls
within a designated range ofvalues. The LCD indicates on the primary
display if the input value is out of (fail) or within the range (pass), which
you selected. Before starting the GOING function, the tolerance range that
an input value will be compared against must be set. This can be accom-
plished with the following procedure .
1) Press the menu key.
2) Move the blinkingcursor to the GOING.
3) Press the ENTER key to select the GOING function mode and to enter
the input reference value. The displaywill show the memory address
number in the secondary display
and the memory contents in the main
display
used as the reference value.
4) There are 2
ways for inputting the reference value.
Method 1: Direct input ofreference value by the following method.
Press the ENTER key for longer than 1sec to modify the contents of the
reference memory. The first digit will start blinking. The digit value may
be changed by pressing the Left/Right arrow keys. Pressing the ENTER
key again will cause the second digit to blink. Press the Left/ltight keys
to change the digit value as required and then press the enter key. This
will make the next digit blink. In the same manner, change its value and
likewise for all the remaining digits. After the last digit is entered, the-
negative sign will blink. Press the Left/Right keys to select positive or
negative and press the enter key. This will make the first decimal point
19

20
blink. Press the Left/Right keys to move the dedmal point to appropriate
position and then press the enter key. This oompletes the input of reference
value and displays the +%annunciator on the top right of the display and
a blinkingsecondary display. The +%tolerance is entered through the se-
condary displayby pressing the Right/left keys Pressing the EN'IER key will
store the +lbIerance value and display the Tolerance annunciato< To enter
the % value use the same procedure as for the +% tolerance value. C1nce the
-%tolerance is entered the GOINO function will start.
5) The second method is the indirect input from one of 10 memories See se-
ctions 5-8 and £>.9 below). The data stored in one of the 10 memory locations
can be used as the reference by the following procedure: fuform the-Steps 1
through3 in this section. Press the LefVRight keys to select the memory add-
ress number where the reference value is stored, then press the EN'IER key.
This
setS the input reference value. Th set the +% and %tolerances use the
procedure in step 4 above.
5-8. STORE
Up to 10 measurements can be stored or recalled in memory at any time.
To store a measurementvalue in memory
1) Press the menu key
2) Press the Left/Right arrow keys to position the blinking cursor over the
STORE annunciato<
3) Press
the ENTER key to select the store mode.
4) Press
the left or right key to select appropriate memory address. The
secondary display will show the address number. Pressing the ENTER
key stores the displayed measurement reading Note Only numerical data
can be stored in memory. OPENISHRT Continuity and GOING test data
cannotbe stored in memory
5) The memories used for this function are nonvolatile type of EEPROM.
So the memory contents are not erased when the batteries go dead or re-
place. The only way to change the data is by writing new data to a location.
5-9. RECALL
This function recalls data from a memory location that data has been pre-
viously stored in: To Recall a memory location:
1) Press the menu key.
2) Move the Left or right key to position the blinking cursor over recall.
3) Press
the enter key.
4) Press the Left or Right key to select the desired memory address.
The main display will read the contents of the memory indicated by the
address number on the secondary display.