Newport 305-A User Manual

NEWPORT Electronics, Inc. warrants this unit to be free of defects in materials and workmanship for a

®

period of one (1) year from the date of purchase. In addition to NEWPORT’s standard warranty period,
NEWPORT Electronics will extend the warranty period for one (1) additional year if the warranty card
enclosed with each instrument is returned to NEWPORT.

If the unit should malfunction, it must be returned to the factory for evaluation. NEWPORT’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or written
request. Upon examination by NEWPORT, if the unit is found to be defective it will be repaired or
replaced at no charge. NEWPORT’s WARRANTY does not apply to defects resulting from any action of
the purchaser, including but not limited to mishandling, improper interfacing, operation outside of
design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows
evidence of having been tampered with or shows evidence of being damaged as a result of excessive
corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or
other operating conditions outside of NEWPORT’s control. Components which wear are not warranted,
including but not limited to contact points, fuses, and triacs.

NEWPORT is pleased to offer suggestions on the use of its various products. However,
NEWPORT neither assumes responsibility for any omissions or errors nor assumes liability
for any damages that result from the use of its products in accordance with information
provided by NEWPORT, either verbal or written. NEWPORT warrants only that the parts
manufactured by it will be as specified and free of defects. NEWPORT MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein
are exclusive and the total liability of NEWPORT with respect to this order, whether based
on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not
exceed the purchase price of the component upon which liability is based. In no event shall
NEWPORT be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by NEWPORT is not intended to be used, nor shall it be used: (1) as a
“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in
medical applications or used on humans. Should any Product(s) be used in or with any nuclear
installation or activity, medical application, or used on humans, or misused in any way, NEWPORT
assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and
additionally purchaser will indemnify NEWPORT and hold NEWPORT harmless from any liability or
damage whatsoever arising out of the use of the Product(s) in such a manner.

Return Requests/Inquiries

Direct all warranty and repair requests/inquiries to the NEWPORT Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO NEWPORT, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM NEWPORT’S CUSTOMER SERVICE DEPARTMENT (IN
ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the
outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to

Warranty/Disclaimer

prevent breakage in transit.

FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting NEWPORT:

1. P.O. number under which the product was
PURCHASED,

2. Model and serial number of the product
under warranty, and

3. Repair instructions and/or specific problems
relative to the product.

NEWPORT’s policy is to make running changes, not model changes, whenever an improvement is
possible. This affords our customers the latest in technology and engineering.
NEWPORT is a registered trademark of NEWPORT Electronics, Inc.

© Copyright 1998 NEWPORT Electronics, Inc. All rights reserved.
This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic
medium or machine-readable form, in whole or in part, without prior written consent of NEWPORT
Electronics, Inc.

FOR NON-W
NEWPORT for current repair charges. Have the
following information available BEFORE
contacting NEWPORT:

1. P.O. number to cover the COST of the repair,

2. Model and serial number of product, and

3. Repair instructions and/or specific problems

For immediate technical or application assistance please call:

2229 South Yale Street • Santa Ana, CA • 92704-4426 • U.S.A.

Toll Free: 1-800-639-7678 • e-mail: [e-mail]

976 Bergar • Laval (Quebec) • H7L 5A1 • Canada

Toll Free: 1-800-639-7678 • e-mail: [e-mail]

One Omega Drive • River Bend Technology Centre

Toll Free: 0800-488-488 • e-mail: [e-mail]

Postbus 8034 • 1180 LA Amstelveen • The Netherlands

Toll Free: 0800 0993344 • e-mail: [e-mail]

ul. Rude armady 1868 • 733 01 Karvina-Hranice • Czech Republic

Toll Free: 0800-1-666432 • e-mail: [e-mail]

Daimlerstrasse 26 • D-75392 Deckenpfronn • Germany

Toll Free: 0130 11 21 66 • e-mail: [e-mail]

Toll Free: 0800-4-63978 • e-mail: [e-mail]

En Español: [phone] • e-mail: [e-mail]

NEWPORTnet

Newport Electronics, Inc.

TEL: [phone] • FAX: [phone]

Newport Technologies, Inc.

TEL: [phone] • FAX: [phone]

Newport Electronics, Ltd.

Northbank, Irlam, Manchester

Tel: [phone] • FAX: [phone]

TEL: [phone] • FAX: [phone]

TEL: [phone] • FAX: [phone]

TEL: [phone] • FAX: [phone]

9, rue Denis Papin • 78190 Trappes • France

TEL: [phone] • FAX: [phone]

TEL: [phone] • FAX: [phone]

M44 5EX, England

Newport Electronics B.V.

Newport Electronics spol s.r.o.

Newport Electronics GmbH

Newport Electronique S.A.R.L.

Mexico and Latin America

SM

On-Line Service

http://www.newportUS.com

It is our policy to comply with all applicable safety and EMC/EMI regulations worldwide. We are
constantly pursuing certification of our products to the European New Approach Directives. We will
add the CE mark to every appropriate device upon certification.

This device is marked with the international caution symbol. It is important to read the Setup
Guide before installing or commissioning this device as it contains important information
relating to safety and EMC.

ARRANTY REPAIRS, consult

relative to the product.

Internet e-mail

[e-mail]

NEWPORT

Made in the USA

MODEL 305-A

3 1/2 DIGIT MINI-SIZE VOLTMETER

SPECIFICATIONS

Analog Input

Range ±199.9 mV ±1.999 V ±19.99 V ±199.9 V
Input resistance 1 GΩ 1.1 MΩ 1.0 MΩ 1.0 MΩ
Bias current 50 pA 5 pA 1 pA 1 pA
Maximum input 130 Vp 250 Vp 250 Vp 250 Vp

Noise Rejection

NMR, sig hi to sig lo 56 dB, 50/60 Hz
CMR, sig lo to pwr gnd 120 dB, DC to 60 Hz
CMV, sig lo to pwr gnd 1500 Vp per HV test; 354 Vp per

IEC spacing

CMV, sig lo to dig gnd 0 volts

Accuracy at 25°C / Display

Maximum error ±0.05% of reading ±1 count
Display range ±1999
Span tempco ±0.02% of reading / °C
Full-scale step response 1 second
Warmup 30 minutes
Reading rate 2.5 / second
Overrange indication Three least-significant digits blank

Power Options

Input power 24, 100, 115 or 230 Vac ±15%,

49-63 Hz
+5 or 7-32 Vdc, non-isolated

Environmental

Operating temperature 0 to 60°C
Storage temperature -40 to +85°C
Relative humidity 95% at 40°C (non-condensing)

Mechanical

Case type 3/64 DIN (DIN 2472-100)
Bezel 1.89 x 3.78 in (48 x 96 mm)
Panel cutout 1/8 DIN 1.72 x 3.62 in (45 x 92 mm)
Depth behind bezel 4.32 in (110 mm), with connector
Weight 8 oz (227 g)
Case material 94V-1 UL-rated thermoplastic

CHG ECO DATE BY CHK

C 9352 26 OCT 98 ML

11433ML-01

®

TOP VIEWSIDE VIEW

1.89

[48.0]

BEZEL

BACKPLATE

CASE

3.78

[96.0]

3.76

[95.5]

0.76 [19.3]

4.32

[109.7]

MAX

1/8 DIN PANEL CUTOUT

0.25 [6.4] MAX

0.03 [0.8] MIN

PANEL THICKNESS

3.622 +0.032/-.000
[92.00 +0.81/-0.00]

1.772 +0.024/-.000
[45.0 +0.61/-0.00]

0.06
[1.5]

4PLCS

R

S3

P1

DISPLAY

SPAN

ZERO

W1 W2 W3

S3

A

B

C

DE

1
2
3
4
5
6
7

RANGE SELECTION DIMENSIONS

BACKPLATE

SCREWS

METER

BEZEL

LENS

PANEL WITH
1/8 DIN CUTOUT

Voltage Input Range S3

±199.9 mV dc -

±1.999 V dc A
±19.99 V dc B
±199.9 V dc C

Voltage operation was configured per customer order. 115 and
230 Vac operation use the same transformer and may be reversed
with simple wiring installation.

TRANSFORMER # AC VOLTAGE INSTALL REMOVE

48131 115 W1, W3 W2
48131 230 W2 W1, W3

INSTALLATION

1. Remove the 2 phillips screws from behind the display (you don't
have to go inside the meter) holding the rectangular backplate to
the meter. Remove the backplate and set aside.

2. Cut or punch a hole in the panel where you want the meter to
go. The panel can be as thick as 0.25" (6.4mm) to as thin as

0.03" (0.8mm).

3. Insert the meter into the panel cutout.

4. From the rear of the panel, slide the backplate over the case
(smooth side out).

5. Install the 2 phillips screws to secure the meter in 1/8 DIN
mount. Center the meter in hole prior to tightening screws.

ELECTRICAL CONNECTIONS

POWER AND SIGNAL INPUT

P1 ~ AC POWER - DC POWER

1 SIG HI (+S) SIG HI (+S)
2 SIG LO (-S) SIG LO (-S)
3 Hold Hold
4 Digital Return Digital Return
5 Earth GND (ý) -DC (-)
6 Neutral (N) + DC (+)
7 Line (L) No Connection (N/C)

OPTION DESCRIPTION PART #
230 V ac power input Add suffix "-C1"
100 V ac power input Add suffix "-C5"
24 V ac power input Add suffix "-C8"
5 V dc power input Add suffix "-C3"

AVAILABLE OPTIONS

7-32 V dc power input Add suffix "-C2"
Green LED display (instead of Red) Add suffix "-G"

ZERO SPAN

A

B

C

S1

Decimal Point S1

1.999 A

19.99 B

199.9 C
1999 Store jumper above A

CALIBRATION

1. Apply a voltage equivalent to 95% of the range selected to the
signal input.

2. Adjust the span pot for a reading of 1900 ±1 count.

3. Reinstall the lens.