MS 300 SERIES METER
Contents
1. Power Reading coefficient Internal resistance Accuracy 1 Admissible Overload 6 3 phase Range V AC DC Power Reading coefficient Internal resistance Accuracy 1 Admissible Overload 6 1 In of end of range 2 10 A on the 5A range for a maximum measurement time of 2 to 3 minutes 3 10 A on the 5A range for a maximum measurement time of 5 seconds 4 10 In on 5A range for a maximum measurement time of 2 to 3 minutes 5 10 In on 5A range for a maximum measurement time of 5 seconds 6 The current or voltage circuit can withstand permanent overloads of 25 4 MEASUREMENTS 4 1 Measurement time About 2 5 seconds 4 2 Active power Watts DC or single phase measurements U Place the switch on one of the 6 ranges on the left corresponding to the voltage of MI Poue Ex the circuit to measure Connect the MS305 as shown in the diagram the terminal on the right V3 is not connected Read the deflection of the needle on the measurement scale read the value in such a way that the reflection of the needle on the anti parallax mirror is hidden Apply the coefficient corresponding to the voltage and the current indicated by the switch Example With the switch on the 120 V range In the table the coefficient corresponding to 120 V is 5 The result is Watts is therefore Number of divisions read x 5 4 3 Active power Watts on 3 phase 3wir2. 4 wire Add the three single phase powers P1 P2 P3 to find the total active power P Seeconnection shown on the diagram below Note refer to the paragraph on single phase measurement to read P1 P2 and P3 v3 Source Use P2 P3 P1 4 8 Reactive povver Vars on 3 phase 4 vvire Proceed in the same way as for reactive power on 3 phase 3 wire non balanced without taking into account the neutral wire 5 GENERAL CHARACTERISTICS 5 1 Dimensions and weight Dimensions 165x105x50mm Weight 670g 5 2 Maximum climatic conditions Temperature use 10 C to 50 C storage 30 C to 70 C Relative humidity use 580 HR Altitude use lt 2000m 5 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 11 according to CEI 664 Allocated voltage 600V 5 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 gt 3m 6 SUPPLY To order MS305 Delivery 1 vvattmeter 1 user s manual 7 MAINTENANCE Only use the specified spare parts for maintenance The manufacturer shall not be held liable for any incident occurring following repairs carried out b
3. MS 300 SERIES METER USER S MANUAL Safety Meaning of symbol zx 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 MS305 wattmeter To obtain the best service from your unit Read these operating instructions carefully Comply with the precautions for use ra PRECAUTIONS FOR USE Never use on a voltage network over 600V with respect to the earth connection This voltage surge category III wattmeter 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 gt 600V Indoor use in environments with a maximum pollution level of 2 EN 50419 2006 temperature of 10 C to 50 C and relative humidity below 90 Respect the value and type of the fuses to avoid damaging the instrument and canceling the warranty Fuse 1A 500V Use accessories corresponding to safety standards EN 61010 1 2001 with 600V minimum voltage and surge category III Before any measuremen
4. e balanced V3 Source Use Place the switch on one of the 4 ranges of the right corresponding to the voltage of v2 the circuit measured Connected the MS305 as shown on the diagram Read the deflection of the needle on scale 90 Apply the coefficient from the table on the right corresponding to the range chosen Example With switch on range 180V 4 3 The table gives the coefficient corresponding to the range 30 The result of the measurement in Watts is Number of divisions read x 30 v3 Source Use Same procedure as for the measurement on single phase with connected as shown on the diagram opposite In addition to the coefficient for the position of the switch apply the coefficient as for 3 phase See example of measurement on single phase Q Number of divisions read x 5 x V3 4 4 Reactive power Vars on 3 phase 3 wire balanced 4 5 Active power Watts on 3 phase 3 wire non balanced In this case use the two wattmeter method and find the sum of the two single phase powers P1 P2 to obtain the total active power P See connection on the diagram below Note refer to the paragraph on single phase measurement for reading of P1 and P2 V3 Source Use 4 6 Reactive power Vars on 3 phase 3 wire non balanced Take the sum of three powers P1 P2 P3 and apply the coefficient 1 43 to get the total reactive power Seeconnection shown ofthe diagram below V3 Use 4 7 Active power Watts on 3 phase
5. ent 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 Connect the leads to the wattmeter be careful of switch position see below and connect to the circuit to be controlled When an estimated measurement is unknown place the switch at the highest caliber and then gradually reduce it until the appropriate caliber is achieved To obtain power in W multiply the appropriate range value by the reading coefficient indicated in the table 480 V 2400 W 20 480 kO 600 V 2 800 V 3 2404 3 V 3600 W 40 480 kQ 600 V 4 800 V 5 360V 1800 W 20 360 480 V 2 800 V 3 240 V 1200 VV 10 240 kO 380 V 2 400 V 3 1804 3 V 2700 W 30 360 480 V 4 800 V 5 180 V 900 W 10 180 kO 1 on AC 2 5 on DC 240 V 2 400 V 3 1204 3 v 1800 W 20 240 kQ 380 V 4 500 V 5 120 V 600 W 120 kO 240 V 2 400 V 3 60 4 3 v 900 VV 10 120 220 V 4 380 V 5 60 V 300 W 2 5 60 kQ 120 V 2 400 V 3 Single phase Range V AC DC
6. t ensure correct positioning of the leads on the wattmeter 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 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 CONTENTS DESCRIPIWION Pp 2 2 REFERENCE CONDITIONS 2 S PEC F CALIQN n y s s E s 3 MEASUREMENT 5 0 4 4 N E R E 6 GENERAL CHARACTERISTICS 5 SUPPLY O AT 7 7 1 DESCRIPTION The MS305 wattmeter is for everyday use by electricity professionals It offers the following functions Wattmeter power measurement DC and AC 1 1 Safety terminals O4mm COM common terminal receiving the black lead 1 A for Apc and calibers 2 COM V1 common terminal receiving the black lead or voltage 3 V2 for voltage 4 V3 for voltage 5 1 2 2 range dial 6 One black and one red with anti parallax mirror for the Ppc and Pac 1 3 Range selection switch 7 2 REFERENCE CONDITIONS Temperature 23 C 2 C Humidity 45 RH 5 Position horizontal 2 Ensure that the pointer is at zero before starting any measurements Zero adjustm
7. y a party other than its after sales service or approved repairers 7 1 Changing the fuses Opening the wattmeter Open the device by removing the black over Use the same type of fuses to ensure the safety of users and of the device Fuse 5 A 500V 7 2 Storage If the wattmeter is not used for a period of over 60 days remove the battery and store it separately For a shorter period avoid leaving the wattmeter in ohmmeter position There is a risk of premature battery wear if the tips come into contact with it 7 3 Cleaning The wattmeter 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
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