An O ME GA Te c h n o l o g i e s Co m p a n y
M2105/1294
INSTRUCTION
SHEET
DP18 Series
Models DP18-AC1 / -AC2 / -AC3 / -AC4
AC Milliammeter
CCD1294APC2BA
DISPLAYS . . . . . . . . . . . . . . . . . . . . . . 3 digits, 7 segment, red LED
HEIGHT . . . . . . . . . . . . . . . . . . . . . . . . 0.56" (14.2 mm.)
SYMBOLS . . . . . . . . . . . . . . . . . . . . . . 1.8.8.8
DECIMAL POINTS . . . . . . . . . . . . . . . . Selectable by jumpers
OVERRANGE INDICATION . . . . . . . . . Display flashing 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
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.
SPAN
OFFSET
1
10
D
C
B
A
+
-
REAR VIEW
Setpoint R1
(option)
Setpoint R2
(option)
FRONT VIEW
FIG. 2
FIG. 1
SIGNAL
INPUT
SPAN : ADJUST THE MAXIMUM READING.
OFFSET : NOT IN SERVICE
SPAN ADJUSTMENT IS ACCESSIBLE BEHIND THE LOW DOOR.
Isolated digital output
(option)
HOLD,
latch the reading
display, while these pins
are linked
ANALOG OUTPUT
(OPTION)
POWER SUPPLY
see instrument label
½
2
20
200
1.999
19.99
199.9
DISPLAY
READING
DP18-AC1
DP18-AC2
DP18-AC3
DP18-AC4
RANGE
mAac.
MODEL
2000
1999
DECIMAL POINT
CLOSE JUMPER
FIG.5
mA.
RESOLUTION
IMPEDANCE
R
S
in
Ω
D3
D2
D1
-----
221
Ω
22.1
Ω
2.21
Ω
0.187
Ω
0.001
0.01
0.1
1
1650
Ω
R4 value
in
Ω
1580
Ω
RANGE SELECTION
FIG. 3
SIGNAL CONDITIONER
PT1
C
B
A
RS
R4
GROSS SPAN ADJUSTMENT
COMPONENTS VIEW
SIGNAL INPUT
mAac
SELECT THE DESIRED RANGE, MODIFIYNG THE RESISTANCE VALUE Rs AND R4, TO GET THE READING DESIRED,
ACCORDING TO THE VALUES SHOWN IN THE TABLE.
AC CURRENT INSTRUMENT, 3
½
DIGITS, WITH FOUR RANGES SELECTABLE ON THE SIGNAL CONDITIONER BY ONLY MODIFIYNG THE
VALUE OF TWO RESISTORS (SEE TABLE ON FIG.3 ). THE READING CAN NOT BE MODIFIED IN ENGINEERING UNITS UNLESS THE VALUES
OF RS AND R4 ARE CHANGED. THEREFORE USING THE STANDARD VALUES THE DISPLAY WILL SHOW EXACTLY THE VALUE PRESENT
AT THE INPUT SIGNAL.
SPECIFICATIONS
