DMR35-DCA.A01.D04 Page 5 of 8

DMR35-DCA Series

Precision DC Shunt Ammeter

www.murata-ps.com

METER CONFIGURATION

Meter Range Settings

DMR35 meter configuration is controlled through a 5-position DIP switch (SW1-SW5) on the rear of the meter. The individual switches are labelled 1

through 5 on the unit, and the ON position of the switches is also labelled. These switches are used to select both the meter’s measurement range

and the display intensity (brightness).

Switches SW3 through SW5 select the meter’s measurement range, as shown in the table below. Note that for these five meter models, switch SW3

selects either unipolar (OFF) or bipolar (ON) measurement ranges. Switches SW4 and SW5 select the magnitude of the measurement range.

Switch Setting

DMR35 Model

SW3 SW4

SW5

DIP switch

-DCA1

-DCA2

OFF

OFF

OFF

0-1 A

0-10 A

OFF

OFF

ON

0-2 A

0-15 A

OFF

ON

OFF

0-3 A

0-20 A

OFF

ON

ON

0-5 A

0-25 A

ON

OFF

OFF

±1 A

±10 A

ON

OFF

ON

±2 A

±15 A

ON

ON

OFF

±3 A

±20 A

ON

ON

ON

±5 A

±25 A

Display Intensity Settings

Set the display intensity by setting the switches as shown:

SW1 SW2

Dipswitch

Display Intensity

OFF

OFF

Low

OFF

ON

Medium

ON

OFF

High

ON

ON

High2 †3

The meter behaves differently depending on whether bipolar or unipolar

range setting is selected. When the meter is set to a bipolar range

setting, it will display measurements over a +/- range, flashing the

display to indicate overflow for input values greater than +RANGE, and

flashing the display to indicate underflow for input values less than –

RANGE. A zero-value measurement will illuminate a single center LED.

Increasingly negative input values will illuminate the bargraph from

center to the leftmost LED until all left-side LEDs are illuminated at

negative full-scale, and increasingly positive input values will illuminate

the bargraph from center to the rightmost LED until all right-side LEDs

are illuminated at positive fullscale.

When set to a unipolar range setting, the meter will display

measurements over a positive only range. Negative input values will

result in an underflow condition of a flashing zero reading. Positive

input values exceeding the maximum range will result in a flashing

overflow condition. The bargraph will indicate a measurement of zero

or less by illuminating the leftmost LED, and increasingly positive input

values will illuminate the bargraph to the rightmost LED until all LEDs

are illuminated at positive fullscale.

The DMR35 meter family provides the ability to adjust the display

intensity to maximize readability over a range of ambient lighting

conditions. Switches SW1 and SW2 select the display intensity, as

shown in the table below. The meter provides for four settings (LOW,

MEDIUM, HIGH, and HIGH+). Note that the HIGH2 setting results in only

a slightly higher brightness than the HIGH setting.

3

Provides only slightly higher intensity than ‘High’ setting