7/27/2019 internal DMM assembly.pdf

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Ribbon Cable

Agilen t 34970A/34972A Opt ion 001

In t erna l DMM Assembly

I nstal l at i on I nstru cti ons for 34970-80010 Retr ofi t K it

1 Disconnect the power cord.

2 Remove the outer cover from the 34970A/34972A.

To remove the instru ments cover , follow the procedures

shown in chapter 6 of t he 34970A/ 34972A Ser vice Gui de.

3 Connect the internal DMM ribbon cable to themain circuit board.

Connect t he loose end of th e gr ey ribbon cable to connector

J202 on the ma in circuit boa rd . Press down firmly on t he

ribbon cable connector a nd secure th e cable in place with the

locking clips .

Snap Locking Clipsover the top of theconnector to securethe Ribbon Cable

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4 Install the internal DMM circuit board into the chassis.

P osition the interna l D MM circuit boa rd inside th e inst rum entcha ss is by t i l t ing i t a t a n angle a s shown below. Be sure t o position

t he cir cu it board over the tabs in the chassis a s show n. Then,

low er the a ssembly into th e cha ssis unt il it is para l lel with the

34970A/34972A circuit boar d.

5 Lock the internal DMM circuit board in place.

Slide the in terna l D MM circuit boa rd t o t he left (towa rd the rear of

t he in s t r umen t )unt il it locks in place. You will hear a click w hen it is

properly locked in pla ce.

Make sure that shield islocked in place behindthis tab

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6 Twist the internal DMM input cable.

Tw ist the interna l D MM input cable (labeled P101) a t l eas t one ful lturnbefore plugging it into the backplane connector. If you do not t wist t h e

ca ble a s show n, specificat ions will be c ompromised .

7 Insert theDMM input cable into the backplaneconnector.

Insert the interna l DMM input cable into the ba ckpla ne conn ect or a s

shown. P ress firmly t o ensure a good electrical connect ion .

8 Enable the internal DMM.

After insta lling the interna l D MM assembly, you must enable i t for

opera t ion. From th e front -pa nel, select t he DMM ENABLED choice fr

omthe Ut i l i tymenu. From the remote interfa ce, use the INST:DMMcomma nd.

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Opt 001

9 Modify the Labeling on the Rear Panel.

If you origina lly ordered th e inst rument withoutthe in terna lDMM, a solid bla ck circle should be visible above the rear -panel

Opt . 001 label. After insta lling the interna l D MM retrofit kit ,

be sure t o draw an X through t he bla ck circle using a permanent

marker a s shown below.

10 Replace the outer cover on the Agilent34970A/34972A.

To replace the cover, follow the procedures sh own in chapter 6 of t he

34970A/ 34972A Ser vice Gui de.

Ca l i b r a t i o n I nf or m a t i on

The in ternal DMM w as ca librat ed before it w a s shipped from t he

fa ct ory (a ca libra tion certificat e is included). H ow ever, a ft er installingthe in t er na l DMM, you will w a n t t o ma ke sure tha t you run theZeroAdjustmentprocedure a s outlined in chapter 4 in t he

34970A/ 34972A Ser vice Gui de. The in ternal DMM is g uaranteed

t o meet the inst rumen t s 1-yea r accuracy specifica t ions .

Agilent Technologies, Inc. 1998-2010Printed in Malaysia E0210

Edition 1 February 2010

Opt 001

Internal DMM

is NOT installed.

Internal DMM

is installed.

*34970-90053*34970-90053