LOW-COST, 3 1/2 DIGIT PROCESS METER
MODEL 202A-P
Option - E Process Meter with Transmitter Excitation
Made in Santa Ana, CA
Electromagnetic Compatibility

NEWPORT PRODUCT INFO
MANUAL - PDF Version 202A-P
MECHANICAL 1/8 DIN (2A) Case
MECHANICAL Connections Diagram
PRICE
REQUIRES ADOBE ACROBAT - HELP
STANDARD FEATURES
Zero and span adjustments of 2,000 counts each ±1,999-count display span
Standard signal ranges of 4-20 mA, 1-5 V, 0-10 V
120 dB CMR, 56 dB NMR
Bright, 0.56 in (14.2 mm) LED display
Automatic polarity
Display hold and test
115/230 Vac power
EMI/RFI filter for AC power
Screw-terminal barrier strip
Short 4.1 in (104 mm deep) 1/8 DIN case
   
OPTIONS
Isolated 9-32 Vdc power
Isolated 26-56 Vdc power
NEMA-4 splash-proof lens cover

Model 202A-P
is a low-cost 3 1/2 digit (±1,999 count) process meter for applications where indication-only is required. It provides a span adjustment of 2,000 counts for all signals, a zero adjustment of ±1,000 counts for input signals of 4-20 mA and 1-5 V and a zero adjustment of ­1,500 to +500 counts for input signals of 0-10 V. Scaling and calibration are easily accomplished in the field by multiturn potentiometers accessible behind the lens. Accuracy is 99.9% of reading.

The 202A-P can also be used in ratiometric pot-follower applications to determine liquid level or valve setting from the position of a potentiometric wiper. The required external reference voltage can be derived from the meter's own 4.7 V dc supply.

COMPACT CASE
The 202A-P 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.

OPTIONS
Options are isolated 9-32 V dc or 26-56 V dc power, a PCB edge connector for display control and output of +4.7 V dc and ­4.7 V dc power, and a splash-proof lens cover which meets NEMA-4 requirements.

SPECIFICATIONS

ANALOG INPUT
Range
4-20 mA
1-5 V
0-10 V
Input resistance
13 ohm
1 Mohm
1 Mohm
Bias current
50 pA
10 pA
5 pA
Maximum input
55 mA
250 V
250 V
Ratiometric reference
0.1 or 1.0 V dc +100%/­50%

NOISE REJECTION
NMR, SIG HI to SIG LO:
56 dB, 50/60 Hz
CMR, SIG GND to SIG HI: 120 dB, DC to 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

ACCURACY AT 25°C
Maximum error:
±0.05% of reading ±1 count
Zero tempco: ±0.01% of offset/°C
Span tempco, ratiometric: ±0.01% of reading/°C
Span tempco, non-ratiometric: ±0.03% of reading/°C
Full-scale step response: 1 s
Warmup to rated accuracy: 1 min

ANALOG-TO-DIGITAL CONVERSION
Technique:
Dual-slope, average value
Signal integration period: 100 ms
Read rate: 2.5/s

DISPLAY
Type:
7-segment, red LED
Height: 0.56 in (14.2 mm)
Symbols: ­1.8.8.8
Decimal points: Three positions, programmable by jumpers or at connector, 10 mA sink
Overrange indication: Three least-significant digits blank

DIGITAL INPUTS
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: 3.7 W
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


Copyright 2003, NEWPORT Electronics, Inc. All rights reserved.
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