Hobo S-FS-TRMSA Manual

FlexSmart™ TRMS Module (S-FS-TRMSA & S-FS-TRMSA-D) Manual
FlexSmart TRMS Module
Models: S-FS-TRMSA
S-FS-TRMSA-D
Included Items:
• Detachable screw terminal
connector
• Imprintable label
10093-H MAN-S-FS-TRMSA
The S-FS-TRMSA and S-FS-TRMSA-D are easy-to-configure, True-RMS input measurement
modules. The S-FS-TRMSA is compatible with HOBO® H22 series data loggers. The S-FS-TRMSA-D
is compatible with HOBO H22 loggers, U30 stations, and RX3000 stations. The "-D" variant has a
modular connector for connecting to an available smart-sensor port. Both 2-channel modules
have an input range of 512 millivolts RMS full-scale. Thus, they are fully compatible with
industry-standard voltage and current transformers (PT and CT) which output 333 millivolts RMS
full-scale.
The modules feature extremely low-power operation, resulting in long battery life for
unattended data logging applications.
Note: Refer to the H22 logger, U30 or RX3000 station, and HOBOware® software manuals at
www.onsetcomp.com/support/manuals for additional information on using and configuring the
FlexSmart TRMS module.

Specifications

Input Channels
Field Wiring
Input Range
Minimum Input Voltage
Maximum Input Voltage
Input Frequency
Accuracy
ADC Resolution
AC Waveform
Power Requirements
Transfer Function
Measurement Averaging Option
Two; AC-coupled
Two-wire via screw terminals on detachable connector, 16-24 AWG
Replacement detachable connectors: Part of spares kit (A-FS-TRMSA-
4P-1)
5 to 512 mVRMS
5mVRMS; Input voltages < 5mV will be clipped to zero (see graph
below)
±1V referred to AC- terminals (pins 2 and 4)
50/60 Hz
±0.3% of reading +/- 0.5% of FSR
15 bits
<4 Crest Factor
+3.3V @ 3mA active, 6μA sleep
[ ]
T
1
( )

2
= •
VRMS V t dt
T
0
Yes
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
Minimum Input Voltage Graph