FT5500 FIELD MOUNT TRANSMITTER STRAIN GAUGE (BRIDGE) INPUT
- NEMA 4X Splashproof Enclosure
- Optional 3-1/2 Digit Display
- Input Spans as low as 0.4mV/V (at 10V excitation)
- Excitation Adjustable from 4 to 12V
- Offset and Nonstandard Ranges Available
- Urethane-Coated Circuit Boards
- AC or DC Power Options
The Model FT5500 Strain Gauge Transmitter supplies excitation to a strain gauge or other resistance bridge, amplifies the bridge voltage and provides a proportional, isolated DC voltage or current output. A low-drift input amplifier maintains accurate readings under varying ambient conditions. Excitation voltage may be set anywhere between 4 and 12 volts.
A rugged NEMA 4X splashproof, corrosion-resistant housing protects the transmitter in outdoor and industrial environments. The circuit boards are urethane coated for protection against condensation and contaminants. Model FDT5500 includes a 3-1/2 digit user-rangeable display to provide local process indication in engineering units.
Available options include AC and DC power choices and reverse-acting transmitter (decreasing output with increasing input). Bridge applications other than strain gauges are possible: contact the factory with your requirements.
ORDERING INFORMATION
Model Numbers:
FT5500: Transmitter only. FDT5500: Transmitter with display.
Power:
Add suffix A (Model JH5500A) for AC power, D for DC power. Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
Input Range:
Specify range required in millvolts (mV), volts (V) or millivolts per volt (mV/V). For example, with 10V bridge excitation a range of 0/20mV is the same as 0/2 mV/V. See specifications below for input capabilities. Offset input ranges are allowed.
Bridge Excitation:
User-adjustable. Normally factory-set to 10V. For other settings specify any voltage between 4 and 12Vdc. (Note: 40mA maximum load. For 120ohm bridges, specify 4.8V or less.)
Output Range:
Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below.
Display Range (optional):
Specify display reading at low end and at full scale, including decimal point if required. See "Display Capabilities" specification, below. Note that reverse-acting display is possible - full scale reading downscale from low end. Display may be re-ranged by user.
Reverse-Acting Transmitter (decreasing output with increasing input):
Change last digit of the model number to 1 (for example, FT5501A).
Loop-Powered Output:
4/20mA "current sink" output stage for connection to devices whose inputs provide 24Vdc loop excitation. Change the last digit of the model number to 2 (for example, FDT5502A).
Urethane Coating:
Specify Option U.
Conduit Connection:
Standard: A single 1/2 inch NPT conduit fitting (glass-fiber reinforced nylon) is provided at the bottom of the housing. Other options are possible, including no fitting at all. Contact factory
ELECTRICAL CONNECTIONS
Connections are made to 8 terminals within the enclosure:
1: Input plus (bridge output).
2: Input minus (bridge output).
3: Bridge excitation plus.
4: Bridge excitation minus.
5: Output plus.
6: Output minus.
7: Power (AC or, if DC power option, DC plus).
8: Power (AC or, if DC power option, DC minus).DETAILED SPECIFICATIONS
Input Capabilities:
4mV (0.4mV/V at 10V excitation) minimum span, 10V (1V/V at 10V excitation) maximum. Offset ranges are allowed. (Input Impedance: 200kohms.)
Excitation Voltage:
Adjustable 4 to 12Vdc. Factory set to 10V unless otherwise specified. 40mA maximum current. (120 ohm bridges limited to 4.8V excitation or less. 350 ohm bridges ok to 12V.)
Voltage Output Capabilities:
1 volt minimum output span, -10 to +15V absolute limit. Offset ranges are allowed. Maximum output load, 10mA (1Kohm at 10V output).
Current Output Capabilities:
1mA minimum output span, 0 to +25mA absolute limit. Positive offsets are allowed, negative outputs are not. Output drive capability, 24V (1,200 ohms max. at 20mA output).
Display Capabilities:
Low end and full scale readings may be anywhere between -1999 and +1999 counts. A fixed decimal point may be added in any position. Minimum span (full scale minus low end) is 10 counts. Reverse-acting display is possible (full scale reading downscale from low end). Display may be re-ranged by user.
Accuracy (factory calibration):
+/-0.1% of span or 10 microvolts, whichever is greater.
Adjustability:
Zero and span each are adjustable approx. +/-15% of span.
Linearity:
+/-0.05% of span or better.
Response Time:
Under 100 milliseconds.
Isolation:
3-way (Power/Input/Output) 1,500Vac rms (2,100V peak).
Guaranteed Operating Temperature:
-10 to +60oC (14 to 140oF).
Temperature Stability:
+/-(0.02% of span plus 1.3 microvolts) per oC, or better.
Power Requirements:
AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.
