DLRO200-115 Megger, DLRO200-115 Datasheet
DLRO200-115
Manufacturer Part Number
DLRO200-115
Description
DIGITAL LOW RESISTANCE OHMMETER, 1OHM
Manufacturer
Megger
Datasheet
1.DLRO200-115.pdf
(2 pages)
Specifications of DLRO200-115
Resolution (ohm)
0.1µohm
Test Current
200A
Accuracy
Voltage
External Height
410mm
External Width
250mm
External Depth
270mm
Weight
32lb
Lead Free Status / RoHS Status
na
Lead Free Status / RoHS Status
na
DLRO 200-115
Digital Low Resistance Ohmmeter
DESCRIPTION
The DLRO200-115 is designed to check and measure contact
resistance in high voltage circuit breakers, disconnecting
switches (isolators), busbar joints, or for any low resistance
measurement. The test set accurately measure resistances
ranging from 0.1µΩ to 1Ω, at high currents.
This versatile instrument can provide test currents from
10 amps up to 200 amps, subject to the load resistance
and supply voltage. For those applications that demand a
smooth dc current, the DLRO200-115 has extra filtering on
the output to reduce mains frequency ripple and can drive
200 amps through a total current loop resistance of
11 milliohms. The filtered output of the DLRO200-115 also
eliminates magnetic transients that could inductively trip a
breaker’s control (bus differential relay), if left in the test
circuit.
The unique design allows the weight and size of the
DLRO200-115 to be kept to a minimum; the instrument
weighs less than 32 lbs. (14.5 kg). This small size plus a
water/dust ingress rating of IP54 makes the test set equally
at home in the workshop, on the production floor or in the
field.
As many as 300 sets of results may be stored in the test set’s
on-board memory for later download to a PC or may be sent
directly to a printer via the RS232 port. You may also add
notes to any stored result by using the on-board
alphanumeric keypad, thereby making later identification of
results easier to determine.
As well as adding notes to stored results, the alphanumeric
keypad allows you to set the test current directly by keying
in the value required. The DLRO200-115 will check the
continuity of the test circuit, and will quickly ramp the test
current up to the desired level. The keyboard is also used to
set upper and lower limits for the result and to prevent the
use of excessive currents by setting an upper limit to the
allowable test current.
The DLRO200-115 uses a four terminal measurement
technique to cancel the resistance of the test leads from the
measurement.
The test set operates in one of three modes, which are
simply selected from the on-screen menu.
CONTINUOUS mode is provided for users who wish to
monitor a resistance over a period of time. Connect the test
leads, select the test current and press the TEST button. The
DLRO200-115 will pass a current continuously, and measure
the load resistance at 2 second intervals, until the test button
is pressed to stop the test or the test circuit is interrupted.
In NORMAL mode you connect the leads, select the test
current and press the TEST button. The test current will
ramp up to the desired level, hold for 2 seconds and then
ramp down. The whole process takes approximately
10 seconds.
In AUTO mode select the desired current, connect the
current leads and press the TEST button. The TEST lamp
will flash to show that the DLRO200-115 is ready to carry out
a test. As soon as the potential leads are connected, a test
Small and weighs less than 32 lbs (14.5kg)
Test currents from 10 A to 200 A d.c.
Filtered direct current output eliminates
magnetic transients
0.1 µΩ best resolution
On board memory for up to 300 test
results and notes
RS232 port to download stored results
or for real time output to a printer
Supplied complete with 16 ft. (5m)
test leads and download software
Digital Low Resistance Ohmmeter
DLRO 200-115
DLRO200-115 Summary of contents
Page 1
... The whole process takes approximately 10 seconds. In AUTO mode select the desired current, connect the current leads and press the TEST button. The TEST lamp will flash to show that the DLRO200-115 is ready to carry out a test. As soon as the potential leads are connected, a test DLRO 200-115 ...
Page 2
... They will remain connected there until all tests have been completed. When the voltage leads make contact across a joint, the DLRO200-115 detects that all four leads are connected, carries out a test and stops. When you move to the next joint the DLRO200-115 detects the already completed circuit automatically and carries out the next test, and so on until all joints have been tested ...