Chapter 10. Specifications
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 215
Environmental
Operating
Temperature: –20 to 55°C (–4 to 131° F)
Storage
Temperature: –40 to 70°C (–40 to 158° F)
Note: To ensure maximum battery life storage, do not exceed 35 °C (95° F)
for long periods.
Operating Modes
Flow Measurement: Transit-Time™ mode with clamp-on or wetted
transducers
Energy: To calculate energy flow rate, use the external
loop-powered RTD transmitter (Part # 2CHRT)
Input/Output
Keypad: 25-key rubberized tactile membrane keypad
Display: 240 × 200 pixel LCD graphic display
with EL backlight
Printer/Terminal: Infrared communications port
Analog Output: One 4-20 mA or 0-20 mA current output
Digital Output: One user-selectable pulse (solid-state, 5-V max.) or
frequency (5-V square wave, 100 to 10,000 Hz)
Analog Input: Two 4-20 mA analog inputs with switchable 16 V
supply for loop-powered temperature transmitters
Acoustic: One pair of LEMO® coaxial transducer connectors
Cable and length: Cable length 8 m (25 ft) standard. Up to 305 m
(1000 ft) optional with extension cables.