4 1/2 DIGIT
PROCESS METER WITH TRANSMITTER EXCITATION
MODEL 2002B-E
/ 3002-E
BUILT-IN TRANSMITTER EXCITATION SUPPLY
Model 2002B-E
is a high-resolution digital process monitor which incorporates an
electrically-floating supply for powering transmitters, active transducers
and bridges. In many cases, this built-in supply can eliminate the
need for a more expensive external supply. The output voltage is adjustable
from 10 to 24 V dc. Maximum output current is 50 mA at any voltage
setting.
HIGH-RESOLUTION
PROCESS MONITOR
Except for
the excitation supply, the 2002B-E is identical to the 2002B-P, a
low-cost 4 1/2 digit (+19,999-count) process monitor for indication-only
applications. It provides extensive zero and span adjustments to measure
signals such as 4-20 mA, 1-5 V and 0-10 V in engineering units. Scaling
and calibration are easily accomplished in the field by multiturn
potentiometers accessible behind the lens. Accuracy is up to 99.98%
of reading.
COMPACT
CASE
The 2002B-E
is housed in a 1/8 DIN case that requires less than 4.1 in (104 mm)
behind the panel. A screw-terminal barrier strip for signal and power
is standard.
SPECIFICATIONS
ANALOG
INPUT
|
Signal
Range
|
4-20
mA
|
1-5
V
|
0-10
V
|
|
Resolution
|
0.8
µA
|
0.2
mV
|
0.5
mV
|
|
Input
resistance
|
130
ohm
|
1 Mohm
|
1 Mohm
|
|
Bias
current
|
50 pA
|
10 pA
|
5 pA
|
|
Maximum
input
|
55 mA
|
250
V
|
250
V
|
Span
range: 0 to 19,999 counts
Zero range:
19,999 to +19,999 counts
REFERENCE
Internal
(standard): 1.0 V ±5%, 12 kohm source resistance
External
(ratiometric): 0.5 to 2.0 V, 680 kohm input resistance
ACCURACY
AT 25°C
|
REFERENCE
|
INTERNAL
|
EXTERNAL
|
|
Maximum
error
|
±0.01%
of span
|
±0.01%
of span
|
| |
±2
counts
|
±2
counts
|
|
Zero
tempco
|
±0.5
counts/°C
|
±1
count/°C
|
|
Span
tempco
|
±0.01%
of span/°C
|
±0.005%
of span/°C
|
Full-scale
step response: 1.0 s
Warmup
to rated accuracy: 10 min
NOISE
REJECTION
NMR, SIG
HI to SIG LO: 70 dB, 50/60 Hz
CMR, SIG
GND to PWR GND: 120 dB, DC to 60 Hz
CMV, SIG
GND to PWR GND: 1500 Vp per HV test, 354 Vp per IEC spacing
ANALOG-TO-DIGITAL
CONVERSION
Technique:
Dual-slope, average value
Signal
integration period: 100 ms
Read rate:
2.5/s
TRANSMITTER
EXCITATION SUPPLY
Output
voltage: adjustable from 10 or 24V dc
Output
current: 50 mA max
Line regulation:
±0.01% typ, ±0.04% max for 10% change of AC power voltage
Load regulation:
±0.15% typ, ±0.5% from zero to max load
Tempco:
±0.02%/°C
Ripple
at 50/60 Hz: 0.01%
DISPLAY
Type:
7-segment, red LED
Height:
0.56 in (14.2 mm)
Symbols:
1.8.8.8.8
Decimal
points: Four positions, programmable by jumpers behind lens or
at connector, 10 mA sink to DIG GND
Overrange
indication: Four least-significant digits flash
DIGITAL
INPUTS
Signals:
Display hold, blanking, display test, decimal point select
Level:
TTL or 5 V CMOS compatible
POWER
AC voltages:
115 or 230 V ac, ±15%
AC frequency:
49 to 440 Hz
DC voltages:
9-32 V dc, isolated to 300 Vp; 26-56
V dc, isolated to 300 Vp
Power consumption:
4.0 W nominal
Output
voltages: +4.7 V dc and 4.7 V dc ±5%, 10 mA max
ENVIRONMENTAL
Operating
temperature: 0 to 60°C
Storage
temperature: 40 to +85°C
Relative
humidity: 95% at 40°C (non-condensing)
MECHANICAL
Dimensions:
Newport DIN2A (short 1/8 DIN) case (see Mechanical section for drawings)
Weight:
15 oz (425 g)
Case material:
94V-0 UL-rated polycarbonate
Connectors
- Power & signal: D4 screw-terminal barrier strip (std)
Display
control: D1 36-pin PCB edge connector (opt)
Model
2002B-E w/electrically-floating excitation supply & process signal
conditioner, configured for operation with a 2-wire 4-20 mA transmitter
(powered by 4-20 mA loop). Excitation return is tied to signal low.