4220 Flow Meter

Section 1 Introduction

1-8

1.6 Technical Specifications

The technical specifications for the 4220 Flow Meter are found in

Table 1-2. The anticipated longevity for a roll of paper used in the

internal plotter is shown for various chart speeds in Table 1-4.

Battery life expectancy is found in Table 1-5.

Table 1-2 Technical Specifications for the 4220 Flow Meter

Physical Specifications

Size 16" high × 11 1⁄2" wide × 10 1⁄2" deep (40.6 × 29.2 × 26.7 cm) (without
power source attached).
Weight 17 lb. 4 oz. (7.7 kg)
Material High-impact molded polystyrene structural foam.
Type Self-certified NEMA 4X Enclosure.
Display Type 2-line, 40 character/line alphanumeric dot matrix liquid crystal.
Power 12 -14 VDC, 16 mA average at 12.5 VDC (Plotter set at 1" per hour).
Typical Battery Life 7-10 days with plotter at 1" per hour and 4 Ampere-hour Ni-Cad bat-
tery.
14 days with plotter turned off.
Operating Temperature 0° to 140°F (–18° to 60°C).
Storage Temperature –40° to 158°F (–40° to 70°C).
Additional Power Required
for Optional Equipment
Modem 60 mA maximum during operation; 0.1 mA maximum standby.
High-Low Alarm Relay Box 10 mA standby, typical; 190 mA - both relays operated.
Internal Printer
Chart Speeds Off, 1⁄2, 1, 2, or 4 inches per hour.
Ribbon 19.7 ft. (6 m) black nylon - replaceable.
Operating Speed 1.5 lines per second at 68° F. (20° C).
Character Size 0.09" high × 0.07" wide (2.4mm × 1.7 mm), 12 pitch.
Printer Recording Span
Chart Resolution
Display Resolution
User-selected from 1⁄4 ft. (3.6 cm) to over 30 ft. (9.1 m) with multiple
over-ranges.
1⁄240 of selected recording span
0.001 ft. (0.3 mm)
Paper 4.5" wide × 65 ft. (11.4 cm × 19.8 m) plain white paper, replaceable.
Printer Reliability 2.5 million lines MCBF (mean cycles before failure).
Reports Printed Program selections, interval activity reports, flow meter history.
Printer Recording Modes Level, flow rate; includes totalized flow, sampler events, rainfall, tem-
perature, velocity, pH (or) D. O. (dissolved oxygen).
Plotted Linear Data 3 different linear plots can be printed at the same time.