Table of Contents
Advertisement
CALIBRATION
USING MODEL 263
CALIBRATOWSOURCE
Environmental
Conditions
me fo~oting pua~aphs ptide
detded pmcedwes for
c~bratig
the Model 485 Picommeter
using the Model
263 Wbrator/Some.
M but one of the cfibratimr ad-
jmtienta
~e digiti md ~
& done km the ~nt pmel
m over the ~EE~
bus.
TOc~brate the tis~ent
bm the tint pmel, pefiom
the fo~otig
pmedures,
muitig
pma~aph 'TEEE=
BW Cfibration". TO ctibate
the Model 485 over the
=4
bus, pdom
the foflwtig
pmedmes,
ornitig
pmagaph 'Tmnt ~el
Mbration".
Calibmtion Stomge Enable
The Model 485 mmt be in cfibratimr storage enable to
stem cfihation
comtita
h NVRAM. E the instiment
k not placed h ti
mode, subsequent ctibration W be
lost when the ~
at k bd
off. @fiOm the fOflw-
~g steps tO enable cab~mtiOn stOrage.
1. M the Model 485 is presently rm, *
it off.
2. We
holtig
k the S~/CLR button, -
the ina~-
ment back on.
3. When the "CA~ message is displayed, mle=e the
~/CLR
button. The ina~ent
ti
~
to the rmr-
md diapl~ mode md the stotig
of cdibratimr con-
s~ts
is now enabled.
Required Equipment
The fo~-g
item (one of each) me necess~
ti ctihate
the Model ~:
1. WitMq Model 263 Cti&ator/Some.
2. Trim to Tri= Cable (suppfied with 263)
3. kiW~
Model W
Mde BNC to Pemde Tfi
Adapter.
N~:
The fo~owtig ad~tiond item@
be nwces~
if c~bration is to be petioned
over the ~E4
bus.
4. KiMey Model 4853 EEE48
Intetiace tisti~ed h the
Model 485.
5. ~
85 Computer eqtipped tik
~
82937 GP~ kter-
face md 1/0 ROM.
6. KltMey Model 7008 ~E
cable.
C~bration shmdd be pefiomed under labrato~
ccm&-
tiom hatig
m -bient
tempera~
of 23 +l°C md a
relative hufidity
of less tha 70%. With both the Model
485 and 263 on, dow them to wam up for one hem. K
either ina~ent
has ken subjected to mtieme temper-
atim or hufidity,
dow at least one ad~tiond how for
the titiment
to stabike before be@tig
the ctibra-
tion procedw.
NWE
Cfibration can be stopped at ay tie
md ody
those ranges out of spwificatimr need be cd-
bra~d.
Front Panel Calibmtion
Petiom the foE-
steps to dbrate
the Model&
tim
the front pmek
.
1. On the Model 485, depress ZERO C~CK
and select
the M
rmge.
2. With m open tiput, adjust the Z~O
pot for.~
AI
count on the display.
N~E
H
Q104, U105, RIU, Rl14 or RIB hwe been re-
placed, the pico-der
may not zero. See paa-
&aph 5.7 h the Model&
btition
Manual fur
the pmcedti
to bdmce the tiput amp~er.
3. Comect the output of the Model 263 ~hatur/Sowe
to the tiput of the Model 485 as show
h Fi~
2.
M*e
sue the ctibrator is h standby.
4. On the Model 485, press the R~
arrd ~G
pwh-
buttmrs stidtanemrsly
md hold k unti the message
"CAH is &played.
Release the buttons. The tit
is
now h the c~bration mode m kdicated by the "~~
annunciator.
5. Release Z~O
HCK
on the Model 485.
6. Pro&mn the Model 263 to output .m
nA. Use the
AMPS (active) -ent
some.
7. The Model&
maybe displaying a smfl offset (=1
count). TOcmcel this offset, press ML rm the Model
485 to zem the display.
8. Pro~a
the Model 263 to output 1.900W nA.
9. Adjust the display of the Model 485 to read l.~
uatig the S~/CLR
md RCL httons.
The STO/CLR
button hcrements the displayed reading and the R~
button demments
the displayed reatig.
Advertisement
Table of Contents
