!
!
A347$#(S76;9(A9>$G/ 63'>73$&(178$U473$ '#(
!
If!e nabled,!the!semi‐automatic!calibration!uses!a!resistor!present!with in!the!pres sure!transducer,!to!calibrate!the!instrument!
to!the! transducer .!The!resistor!i s!used!to!force!the!mV!output!from!tra nsd ucer!to!a!fi xed!percentage!of!the!full!scale!value!
wh en!the!calibration !relay!shorts!out!the!R‐CAL!connections.!Strain!Gauge!Ca libration!is!a!s ub‐menu!option!i n!Input!
Configuration,!but!can!also!be!accesse d!at!any!time!by!pressing!DOWN!and!FORWARD!s imultaneously.!Allow !time!for!the!
instrument!and!process! to!reach!operating!temperat ure!before!starting.!The!first!strain!gauge!input!is!calibrated!the n!the!
sec ond!if!i t!is!fitted!and!con figured .!
1. Select!the!Shunt!Resistor!as!K#7U895.!If#enabled#the#semi‐automatic#calibration#procedure#is#used.#If#it#is#disabled,#use#
the#Manual#calibration#i nstructions#below .!
2. Set !the!Calibration!Resis tor!value!(default!=!80%!of!sensor!maximu m).!The#instrument#must#know#wha t#percentage#will#
be#applied#to# calibrate#correctly#–#Check#sensor#datasheet.!
3. At!the! Low!Po int!Cali bration!screen,!ensure!the!tr ansduc er!is!at!workin g!te mperat ure!with!zero!pressure!applied,!then!
press!UP!and!DOWN!simultaneously.!Low#end#calibratio n#is#per formed #and#a#completed#message#shown.#The#error#
message#“Count#Failure”#is#shown#if#the#input#was#not#± 10mV#of#the#nominal#0m V#expected#sig nal,#and#calibration#is#not#
altered.#0J$%(&'685(%$;#$X"(7(X768 3"(347#%56&94Y (Z'6(&7#('#8"(>'[9(' #3'(J$;J(9#5(&78$U473$'#('#&9(3J9(<4'U8 9>($%(
&'449& 395(7#5(8'\(&78$U473$'#(J 7%(U99#(&' ><8939 5(%6&&9%%X688"]!
4. At!the! High!Point!Cal ibration!screen,!press!UP!and!DOWN!simultaneously. !The!calibration!relay!turns!ON!to!short!the!R‐
CAL!terminals!together!and!force!required!%mV!value!to!be !output!from!transdu cer!into!the!instruments! input.!High#
end#calibration#is#performed#and#a#completed#message#shown.#The#err or#message#“R #Cal#Failure”#is#shown#if#the#signal#
was#less!than!+20mV!or!greater!than!+ 50mV,#and#calibration#is#not#altered.#0J$%(&'68 5(%$;#$X "(7(X768 3"(347#%56&94(+G178(
49% $%3' 4Y(+9<973(3 J9(&78$U473$'#( <4'&95 649('#&9(3J9(<4'U89>($%(&'449&395Y!
5. The!procedure!from!1!to!4!is!repeated!if!a!2
nd
!str ain!gauge!input!is !configured.!
!
!
A347$#(S76;9(^7#678(178$U473$'#(
!
If!the!shunt!is!disabled,!a!Manual!Calibration!needs!to!be!p erformed!by!user. !Manual!Calibration!requires!the!user!t o!input!
known!Zero!Offset!and!Full! Scale!mV!values!into! the!inp ut!terminals!of!the!in strument!using!an!accurate!mV!calibration!
source .!
!
The!Manu al!Calibration! process!for!the!low!offse t!is!as!follows: !!
1. Ensure!Unit!is!power ed!on!and!mV!Input!from!th e!calibration!signal!source!is !wired!to!the!instrum ent’s!st rain!gauge!
input!terminals.!
2. Enter!the!Strain!Gauge!Calibration!mode,!(e.g.!pr ess! DOWN!and!FORWARD!simul taneou sly).!
3. Select!the!Shunt!Resistor!as!Disabled.!
4. The!Calibr ation!R esistor!percentage!value! is!fi xed!to!100.0%!and!ca nnot!be!changed!by!t he!user.!
5. At!the! Low!Po int!Cali bration!screen,!check!that!the!calibration!signal!is!set!to! exactly!the!tra nsducer!mV!signal!at!zero!
pressu re,!then!press!UP!and!DOWN!simultaneously.!Low#end#calibration#is#pe rfor med#and#a#completed#message#shown.#
The#error#message#“Count#Failure”#is#shown#if#the#input#was#no t#±10mV#of#the#nominal#0mV#expected#signal,# and#
calibration#is# not#altered.#1J9&F("' 64(% $;#78(7#5(49<973(3J9(&78$U473 $'#( <4'&9%%(X4'>(3J9(%3743Y(Z'6(&7#('#8"(> '[9('#3'(
J$;J(9#5(&78$U473$ '#('#&9(8'\(&78$U473$'#(J7%(U99#(&'><89395(% 6&&9%%X688"]!
6. At!the! High!Point!Cal ibration!screen,!check!that!the!c alibrati on!signal!is!set!to!the!full!scale!mV! signal!as!per!the!
transducer!datasheets!(e.g.! 33.3mV),!then !press!UP!and!DOWN!simultaneously.!High#end#calibration#is#pe rfor med#and#a#
completed#message#shown.#The#error#message#“R#Ca l#Fa ilure”#is#shown#and#calibration#i s#not#altered#if#the#signal#was#
less!than!+20mV!or!greater!than!+50mV!O R!the!High!Cal!–!Low!Cal! value!is!less!than!10mV.#1J9&F("'64(%$;#78(7#5(
49<973(3J9(&78$U473$'#(<4'&9%%(X4'>(3J 9(%3 743Y !
To Next Page
Loading...
