DATAKOM DKM-401 Digital Multimeter Installation Guide

DATAKOM DKM-401 Digital Multimeter Installation Guide

DKM-401 MULTIMETER

The DKM-401 is a low cost precision instrument designed to display various AC parameters in a 3- phase distribution panel.

SAFETY NOTICE
Failure to follow below instructions will result in death or serious injury

• Electrical equipment should be installed only by qualified specialist. No responsibility is assured by the manufacturer or any of its subsidiaries for any consequences resulting from the non-compliance to these instructions.
• Check the unit for cracks and damages due to transportation. Do not install damaged equipment.’
• Do not open the unit. There is no serviceable parts inside.
• Fuses of fast type (FF) with a maximum rating of 6A must be connected to the power supply and phase voltage inputs, in close proximity of theunit.
• Disconnect all power before working on equipment.
• When the unit is connected to the network do not touch terminals.
• Short circuit terminals of unused current transformers.
• Any electrical parameter applied to the device must be in the range specified in the user manual.
• Do not try to clean the device with solvent or the like. Only clean with a dry cloth.
• Verify correct terminal connections before applying power.
• Only for front panel mounting.

INSTALLATION

Before installation:

• Read the user manual carefully, determine the correct connection diagram.
• Remove all connectors and mounting brackets from the unit, then pass the unit through the mounting opening.
• Put mounting brackets and tighten. Do not tighten too much, this can brake the enclosure.
• Make electrical connections with plugs removed from sockets, then place plugs to their sockets.
• Note that the power supply terminal is separated from measurement terminals, with common neutral point.

Below conditions may damage the device:

• Incorrect connections.
• Incorrect power supply voltage.
• Voltage at measuring terminals beyond specified range.
• Current at measuring terminals beyond specified range

****Current Transformers must be used for current measurement.
No direct connection allowed

Below conditions may cause abnormal operation:

• Power supply voltage below minimum acceptable level.
• Power supply frequency out of specified limits
• Current transformers not matching related phases.

ELECTRICAL INSTALLATION

**** Do not install the unit closeto high electromagnetic noise emitting devices like contactors, high current busbars, switchmode power supplies and the like

Although the unit is protected against electromagnetic disturbance, excessive disturbance can affect the operation, measurement precision and data communication quality.

• Use cables of appropriate temperature range.
• Use adequate cable section, at least 0.75mm2 (AWG18).
• For current transformer inputs, use at least 1.5mm2 section (AWG15) cable.
• The current transformer cable length should not exceed 1.5 meters. If longer cable is used, increase the cable section proportionally.
• Current transformers must have 5A output.

**** Current Transformers must be used for current measurement. No direct connection allowed

PANEL CUTOUT

REQUIRED PANEL DEPTH

TECHNICAL SPECIFICATIONS

Power Supply Input:
170 – 275VAC, 45 – 66 Hz
Different AC supply voltages available.

Measurement Input Range:
Voltage inputs:
10 – 300 V AC (L-N)
20 – 520 V AC (L-L)

Current inputs: 0.2 – 5.5 A AC
Frequency: 30 – 100 Hz

Accuracy:
Voltage: 0.5%+1digit
Current: 0.5%+1 digit
Frequency: 0.5%+1 digit

Measurement Range:
CT range: 5/5A to 5000/5A
Power Consumption: < 4 W
Voltage burden: < 0.1VA per phase
Current burden: < 1VA per phase

Operating Temperature:
-20°C to +80°C (-4 to +176 F).
Maximum humidity:
95% non-condensing.
Degree of Protection:
IP 54 (Front Panel) ,
IP 30 (Back panel)
Enclosure:
Non-flammable, ROHS compliant,
ABS/PC (UL94-V0)
Installation:
Flush mounting with rear retaining brackets
Dimensions:
102x102x53mm (WxHxD)
Panel Cutout: 92x92mm
Weight: 200 gr

PUSHBUTTON FUNCTIONS

Three buttons on the front panel provide access to configuration and measurement screens.

| ·

• Upper screen·
• Increase related
  value (config mode)

|

• Lower screen·
• Decrease related
  value (config mode)

| NO BUTTON PRESSED FOR _5 MINUTES:
_returns to the main display screen

ADJUSTING THE CT RATIO

| In order to CT ratio configuration menu, hold both MENU buttons pressed for 2 seconds.

Now adjust the desired CT primary rating with MENU buttons.If no button is pressed for 30 seconds, the configuration mode is automatically terminated.Configuration mode may be also exited by holding both MENU buttons pressed.

MENU NAVIGATION

| In order to change the bottom display, push one of the MENU buttons until the desired value appears.

CONNECTION DIAGRAM

References

• DATAKOM ELECTRONICS ENGINEERING A.S

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