Teledyne 4250 Installation And Operation Manual page 21

Display Type
Power
Typical Battery Life
Operating Temperature
Storage Temperature
Modem
High-Low Alarm Relay Box
Chart Speeds
Ribbon
Operating Speed
Character Size
Printer Recording Span
Chart Resolution
Display Resolution
Paper
Printer Reliability
Reports Printed
Printer Recording Modes
Plotted Linear Data
Memory Partitions
Data Storage
Baud Rates
Storage
Level Data
Table 1-2 4250 Technical Specifications
2-line, 40 character/line alphanumeric dot matrix liquid crystal.
12 to 14 VDC; 14 mA average at 12.5 VDC (printer set at 1" per hour, 1 minute level
reading interval, 5 minute velocity reading interval.)
(Standard 4 Ampere-hour nickel-cadmium battery.) 8 to 11 days with printer set at 1"
per hour, 1 minute level reading interval, 5 minute velocity reading interval. 15 days
with printer turned off.
o o
0 to 140 F (–18 to 60 C).
o o
–40 to 140 F (–40 to 60
Additional Power Required for Optional Equipment
60 mA maximum during operation; 0.1 mA maximum standby.
10 mA standby, typical; 190 mA - both relays operated.
Internal Printer
1
/
Off, , 1, 2, or 4 inches per hour.
2
See Table 1-5 for longevity in days.
19.7 ft. (6 m) black nylon - replaceable.
1.5 lines per second at 68
0.09" high  0.07" wide (2.4mm  1.7 mm), 12 pitch.
1
/
User-selected from ft. (3.6 cm) to over 30 ft. (9.1 m) with multiple over-ranges.
4
1
/
of selected recording span
240
0.001 ft. (0.3 mm)
4.5" wide  58 ft. (11.4 cm  17.7 m) plain white paper, replaceable.
2.5 million lines MCBF (mean cycles before failure).
Program selections, interval activity reports, flow meter history.
Level, flow rate, rainfall, temperature, velocity, pH (or) D. O.; includes totalized flow,
sampler events,
3 different linear plots can be printed at the same time.
Flowlink Data Storage and Retrieval System
Maximum of 6 user-defined memory partitions for level or event storage.
Rate of data storage user-selected in 1, 2, 5, 10, 15, 30, 60, or 120 minute intervals.
Serial connection - 300, 1200, 2400, 4800, or 9600 baud.
Serial connection with the optional internal modem - 2400 baud.
80,000 bytes, apportioned per reading as follows: flow = 4 bytes,
level = 2 bytes, sample = 4 bytes, pH or D. O. = 1 byte)
Level readings are stored as a 16-bit number representing .1mm (0.0394 inch); effec-
tive range is 0–65279 meters.
C).
o o
F. (20 C).
4250 Flow Meter
Section 1 Introduction
1-9