Seaward MTS1A Manuel utilisateur

MTS Range

Operating Instructions

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

Operating Instructions

MTS Range

Limited Warranty & Limitation of Liability

CROPICO guarantees this product for a period of 1 year. The period of

warranty will be effective at the day of delivery.

public in any form or manner, either electronically, mechanically, by

photocopying, recording, or in any manner, without prior written consent

from CROPICO. This also applies to accompanying drawings and

diagrams.

Due to a policy of continuous development CROPICO reserves the right to

alter the equipment specification and description outlined in this

publication without prior notice and no part of this publication shall be

deemed to be part of any contract for the equipment unless specifically

referred to as an inclusion within such contract.

Operating Instructions

MTS Range

Disposal of Old Product

This product has been designed and manufactured with high quality

materials and components that can be recycled and reused.

When the crossed out wheelie bin symbol is attached to a product it means

the product is covered by the European Directive 2002/96/EC.

Please familiarise yourself with the appropriate local separate collection

system for electrical and electronic products.

Please dispose of this product according to local regulations. Do not

dispose of this product along with normal waste material. The correct

disposal of this product will help prevent potential negative consequences

for the environment and human health.

User Note:

These Operating Instructions are intended for the use of Competent

Personnel.

Operating Instructions

MTS Range

Contents

Page

Introduction 4

Operation 4

Technical Information 5

Service and Calibration 8

Additional Products from Cropico 9

Operating Instructions

MTS Range

Introduction

The MTS1A and MTS2 Milliohmmeter Test Standards are designed for easy

calibration of low resistance ohmmeters and Kelvin/Thompson Bridges.

The MTS3 Milliohmmeter Test Standard is designed for easy calibration of low

resistance ohmmeter type RCP2A.

True four terminal resistance standards are selected using a specially constructed

switch with low thermal contacts for potential selections and low resistance

contacts for current selection.

The resistance standards may be switched between + full scale, true four terminal

zero, and - full scale (current terminals reversed).

Operation

Important Note: If possible, the MTS Range of Test Standards should be

used in a temperature controlled environment

NOTES: Always refer to manufacturer’s calibration procedure before

attempting to calibrate an instrument.

When taking measurements, always wait for a steady reading.

The instrument to be calibrated is connected to the current and potential terminals

of the MTS Standard. A chassis connection is also provided, although this is not

required when calibrating Cropico ohmmeters. The only requirement for the current

cables is that they can be used up to 10A. The potential cables should be low

thermal emf leads (preferably pure multi-stranded copper with crimped copper

connections).

Three operating modes are possible as follows:

1. +Full Scale

In this mode, the Standard is connected as follows:

This is the standard configuration for calibrating an instrument for full scale value.

Selected

Resistance

Stan

dard

Operating Instructions

MTS Range

Zero

In this mode, the Cl and C2 terminals are short circuited, with no current flowing

through the resistance standards. This gives a true four terminal zero

-Full Scale

This facility has been especially designed for calibrating Cropico Ohmmeter type

DO4A and D07. It may, however, be suitable for use with some other makes of

Ohmmeter.

In this mode, the current connections to the resistance standard are reversed as

follows:

The potential terminals remain unchanged, and therefore this mode is unsuitable

for testing Kelvin/Thompson Bridges.

Technical Information

Terminals: 4 mm. binding posts will accept spade tags and 4 mm.

banana plugs. Low thermal emf types are used for the potential

Working Temp: 5 …20 … 40°C

Storage Temp.: 5 ... +50°C

Switches: Special combination switch with low thermal gold/silver contacts for

the potential selection and low resistance contacts for the current selection.

Size: 215x88x250mm. (WHD)

½ 19” Rack 2U High

467 x 374 x 216 mm. packed in card carton.

Mass 2.8 kg. approx. (3.5 kg. packed in card carton)

Resistance

Standard

Operating Instructions

MTS Range

MILLIOHMMETER TEST STANDAR

D TYPE MTS1

Resistance

Value

(Ohms)

Uncertaint

adjustment

at 20°C

Dissipated

Max

Watts

Current

Max

Amps

Typical Temp.

Coefficient

15 to 20°C

100 kΩ±0.01% 0.1 1 mA <10 ppm

10 kΩ±0.01% 0.1 3 mA <10 ppm

1 kΩ±0.01% 0.6 25 mA <10 ppm

100 Ω±0.01% 0.6 75 mA <10 ppm

19 Ω±0.01% 0.43 150 mA <10 ppm

10 Ω±0.01% 0.45 212 mA <10 ppm

1.9 Ω±0.01% 0.475 500 mA <10 ppm

1 Ω±0.01% 0.56 750 mA <10 ppm

100 mΩ±0.01% 0.625 2.5 A <10 ppm

10 mΩ±0.01% 0.25 5 A <10 ppm

1 mΩ±0.01% 0.1 10 A <10 ppm

MILLIOHMMETER TEST STANDAR

D TYPE MTS2

Resistance

Value

(Ohms)

Uncertaint

adjustment

at 20°C

Dissipated

Max

Watts

Current

Max

Amps

Typical

Temp.

Coefficient

15 to 20°C

400 kΩ±0.01% 0.1 0.45 mA <10 ppm

40 kΩ±0.01% 0.1 1.5 mA <10 ppm

4 kΩ±0.01% 0.1 5 mA <10 ppm

400 Ω±0.01% 0.1 15 mA <10 ppm

40 Ω±0.01% 0.1 50 mA <10 ppm

4 Ω±0.01% 0.1 150 mA <10 ppm

400 mΩ±0.01% 0.1 500 mA <10 ppm

40 mΩ±0.01% 0.1 1.5 A <10 ppm

4 mΩ±0.1% 0.4 10 A <10 ppm

400 Ω±0.1% 0.04 10 A <10 ppm

MILLIOHMMETER TEST STANDAR

D TYPE MTS3

Resistance

Value

(Ohms)

Uncertaint

adjustment

at 20°C

Current

Max 2

seconds

Amps

Typical Temp.

Coefficient

15 to 20°C

5 Ω±0.05% 1 A <10 ppm

500 mΩ±0.05% 10 A <10 ppm

50 mΩ±0.05% 10 A <10 ppm

5 mΩ±0.1% 10 A <10 ppm

Operating Instructions

MTS Range

NOTES

MTS1

A & MTS2

The stated currents are for the reference conditions stated. A 25% overload is

permissible for short periods of time.

MTS3

Is designed for calibration of the Microhmmeter type RCP2A the max. current

stated above is only valid for a pulse current as produced by the RCP2A . The

MTS3 is not intended to be used for measurements where a continuous current

is used.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

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Operating Instructions

MTS Range

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