Omega DP18-RT1 User Manual

An OME GA Te c h n o l o g i e s Co m p a n y
DP18 Series
Model DP18-RT1
True RMS Ammeter
INSTRUCTION
SHEET

True RMS Ammeter for current transformer X/5

½
3 DIGITS AC AMMETER, TRUE-RMS VALUES, WITH SELECTABLE RANGES ON THE SIGNAL CONDITIONER BY PLUG-IN JUMPERS. THE
READING CAN NOT BE MODIFIED IN ENGINEERING UNITS, UNLESS THE AMPLIFIER IS MODIFIED. THEREFORE USING THE STANDARD
AMPLIFIER THE DISPLAY WILL SHOW THE VALUES INDICATED ON THE TABLE. THE INPUT ALLOWS DIRECT CONNECTION TO A CURRENT
TRANSFORMER (CT) WITH A 5 Aac. SECONDARY, WITHOUT NEED FOR AN INTERMEDIATE STEP DOWN.

SPECIFICATIONS

DISPLAYS . . . . . . . . . . . . . . . . . . . . . . 3
HEIGHT . . . . . . . . . . . . . . . . . . . . . . . . 0.56" (14.2 mm.)
SYMBOLS . . . . . . . . . . . . . . . . . . . . . . 1.8.8.8
DECIMAL POINTS . . . . . . . . . . . . . . . . Selectable by jumpers
OVERRANGE INDICATION . . . . . . . . . Display flashes 1999
INPUT CONFIGURATION . . . . . . . . . . . Bipolar single
ZERO . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
SPAN ADJUSTMENT . . . . . . . . . . . . . . ± 5 %
CONVERTER . . . . . . . . . . . . . . . . . . . . Dual-slope, average value
SIGNAL INTEGRATION PERIOD . . . . . 80 ms.
READ RATE . . . . . . . . . . . . . . . . . . . . 3.12 / sec.
RANGES . . . . . . . . . . . . . . . . . . . . . . . See table selection fig. 3
HOLD . . . . . . . . . . . . . . . . . . . . . . . . . Optional
NOISE REJECTION NMR . . . . . . . . . . . 50 dB. 50/60 Hz.
ACCURACY . . . . . . . . . . . . . . . . . . . . 0.2 % ± 1 count
WARMUP TO RATED ACCURACY . . . 2 minutes
SPAN TEMPCO . . . . . . . . . . . . . . . . . . 150 ppm.
ZERO TEMPCO . . . . . . . . . . . . . . . . . . 2.5 µV/°C.
OPERATING TEMPERATURE . . . . . . . 0 to 50 °C (32 to 122 °F)
STORAGE TEMPERATURE . . . . . . . . . -40 to 80 °C (-40 to 176 °F)
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . 310 gr. (0.68 lb)
CASE MATERIAL . . . . . . . . . . . . . . . . ABS, DIN 43700, black color
STANDARD POWER . . . . . . . . . . . . . . 115 Vac. ± 10 %, 50/60 Hz.
POWER CONSUMPTION . . . . . . . . . . . 5.5 VA for AC.
ELECTRICAL CONNECTIONS . . . . . . . Push-in cable connectors
BURN-IN . . . . . . . . . . . . . . . . . . . . . . . 24 h.
FIG. 3
SIGNAL INPUT
5 Aac.
PLACE THE PLUG-IN JUMPER ON THE
SELECTOR S1, IN FUNCTION OF THE
NOMINAL CURRENT
TRANSFORMER, AND THE DECIMAL
POINT JUMPER ON THE
CORRESPONDING POSITION (FIG. 5).
TO OBTAIN THE INDICATED PERFOR-
MANCE, USE CURRENT
TRANSFORMERS CLASS 0.5 OR
BETTER
M2107/1294
½
digits, 7 segment, red LED

RANGE SELECTION

C
B
SIGNAL CONDITIONER
COMPONENTS VIEW
A
CLOSE
I NOMINAL READING
Amp.AC Amp.AC JUMPER
5 5.00 F
10 10.00 C
15 15.0 B
40 40.0 G
50 50.0 F
60 60.0 E
75 75.0 D
100 100.0 C
CCD1294APC2BA
FRONT VIEW
FIG. 1
SPAN : ADJUST THE MAXIMUM READING.
OFFSET : NOT IN SERVICE
SPAN ADJUSTMENT IS ACCESSIBLE BEHIND THE LOW DOOR.
FIG. 2
Setpoint R2
(option)
Isolated digital output
(option)
SIGNAL
INPUT
ANALOG OUTPUT
(OPTION)
HOLD,
latch the reading
display, while these pins
are linked
B
IC2
A
S1 SELECTOR
RESOLUTION I NOMINAL
Amp.AC Amp.AC
150
0.01
400
500
600
750
0.1
1000
1500
2000
SPAN OFFSET
REAR VIEW
Setpoint R1
(option)
D
C
1
10
B
A
+
-
POWER SUPPLY
see instrument label
D F
C E G
CLOSE
READING RESOLUTION
Amp.AC JUMPER Amp.AC
0.1
150.0 B
400 G
500 F
600 E
750 D
1
1000 C
1500 B
1999 A