MCP MS 300 Series User manual

MS 300 SERIES METER
USER’S MANUAL

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Safety
Meaning of symbol
CAUTION! Please consult the operating instructions before using the device. In these operating instructions, failure to
follow or carry out instructions preceded by this symbol may result in personal injury or damage to the device and the
installations.
Meaning of symbol
This appliance is protected by double insulation or reinforced insulation. It does not have to be connected to an earth
protection terminal for electrical safety.
Thank you for purchasing this MS301 meter.
To obtain the best service from your unit:
- Read these operating instructions carefully,
- Comply with the precautions for use.
PRECAUTIONS FOR USE
 Never use on a voltage network over 600V with respect to the earth connection. This voltage surge category III
current meter complies with stringent reliability and availability requirements, corresponding to fixed industrial and
domestic installations (see IEC 664-1).
 Do not use on alternative and continuous voltages > 600V.
 Indoor use in environments with a maximum pollution level of 2 (EN 50419:2006) temperature of -10ºC to +50ºC
and relative humidity below 90%.
 Respect the value and type of the fuses to avoid damaging the instrument and canceling the warranty.
 Fuse 500V/3A
 Fuse 500V/10A
 Use accessories corresponding to safety standards (EN 61010-1:2001) with 600V minimum voltage and surge
category III.
 Before any measurement, ensure correct positioning of the leads on the current meter and of the switch. When the
value range of a measurement is not known, place the switch at the highest caliber, and then gradually reduce it until
the appropriate caliber is achieved: the reading should preferably be in the upper 2/3 of the range.
 During current intensity measurements (without a clip-on current meter), stop circuit power supply before
connecting or disconnecting the current meter or changing caliber.
 The leads must be disconnected to open the lower half of the meter case
 Never connect to the circuit to be measured if the casing is not properly closed.

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CONTENTS
1 - D e s c r i p t i o n …………………………………………………………………………………2
2 - R e f e r e n c e c o n d i t i o n s ………………………………………………………………………3
3 - S p e c i f i c a t i o n s ………………………………………………………………………………3
4 - G e n e r a l c h a r a c t e r i s t i c s ……………………………………………………………………4
5 - S u p p l y ……………………………………………………………………………………5
6 - M a i n t e n a n c e ………………………………………………………………………………5
1 DESCRIPTION
The MS301 meter is for everyday use by electricity professionals. It offers the following functions:
-Current meter: current intensity measurement (ADC and AAC)
1-1 Safety terminals, Φ4mm
 COM common, terminal receiving the black lead (1)
 A for ADC and AAC calibers (2)
 10A for 10A calibers (DC/AC) (3)
1-2 4-range dial (4)
2 black, with anti-parallaxe mirror, for the ADC
2 red for the AAC measurements
1-3 Function selection switch (5)

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2 REFERENCE CONDITIONS
Temperature: 23ºC±2ºC
Humidity: 45%RH±5%
Position: horizontal±2°
Ensure that the pointer is at zero before starting any measurements.
Zero adjustment: open the device. Mechanical zero adjustment is carried out by turning the screw on the back of the null
meter.
Ensure that the switch is correctly positioned.
When an estimated measurement is unknown, place the switch at the highest caliber, and then gradually reduce it until the
appropriate caliber is achieved: the reading should preferably be in the upper 2/3 of the range.
3 SPECIFICATIONS
3-1 DC CURRENT
ADC Scale(indication) Reading coefficient Voltage drop at
inputs Accuracy Protection
100mV 100 ×1 100mV
100μA 100 ×1 375mV
300μA 30 ×10 375mV
1mA 100 ×0.01 375mV
3mA 30 ×0.1 375mV
10mA 100 ×0.1 375mV
30mA 30 ×1 375mV
100mA 100 ×1 375mV
300mA 30 ×10 375mV
1A 100 ×0.01 375mV
3A 30 ×0.1 375mV
3A/500V
10A 100 ×0.1 100mV
1.5%
10A/500V

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Do not use input AAC on unprotected intensity transformers.
3-2 AC CURRENT
AAC 10mA 30mA 100mA 300mA 1A 3A 10A
Scale(indication) 100 30 100 30 100 30 100
Reading coefficient ×0.1 ×1 ×1 ×10 ×0.01 ×0.1 ×0.1
Voltage drop at inputs 750mV 750mV 750mV 750mV 750mV 750mV 100mV
Accuracy 2.0%
Protection 3A/500V 10A/500V
4 GENERAL CHARACTERISTICS
4-1 Dimensions and weight
Dimensions: 165×105×50mm
Weight: 670g
4-2 Maximum climatic conditions
Temperature use -10ºC to +50ºC; storage -30ºC to +70ºC
Relative humidity use ≤80% HR
Altitude use <2000m
4-3 Compliance with international standards
Electrical safety (EN 61010-1 -2001)
CEI 1010-1 EN61010 NF-C 42020 VDE 0411
 Double insulation:
 Pollution level: 2
 Installation category: III according to CEI 664
 Allocated voltage: 600V
4-4 Electromagnetic compatibility
 Emission (EN 61326-1:2006)
 Immunity (EN 61326-1:2006)
Maximum influence in the presence of conducted radio frequencies: 3 times the accuracy class if the length of the
measured circuit is >3m

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5 SUPPLY
To order MS301
Delivery:
- 1 current meter
- 1 user’s manual
6 MAINTENANCE
Only use the specified spare parts for maintenance. The manufacturer shall not be held liable for any incident occurring
following repairs carried out by a party other than its after-sales service or approved repairers.
6-1 Fuse change
Opening the current meter:
Open the device. Use the same type of fuses to ensure the safety of users and of the device.
A and COM = (3A fuse(s)),
10A and COM = (10A fuse).
6-2 Cleaning
The current meter must be disconnected from all electricity sources.
To clean the casing, use a cloth dampened with soapy water. Wipe over with a damp cloth. Dry quickly with a dry cloth or
forced air.