cec 4-137 Quick Start Manual

DESCRIPTION
The 4-137 is a seismic mass type velocity transducer designed for measuring radial vibrations at high temps up to +700°F
(+371°C). A seismic mass magnet moves on special ceramic bearings. A coil is attached to the case, and movement
between the magnet and coil produce the output signal when the case vibrates. This air damped system operates above
its natural frequency. The voltage output is proportional to velocity.
SPECIFICATIONS
Sensitivity: @+77°F (+25°C), 100 Hz, 1 IPS (25.4 mm/s) RMS into 10,000 ohm resistive load
4-137-0006:
4-137-0011:
4-137-0015:
4-137-0016:
4-137-0022:
4-137-0121:
Sensitivity at Temperature:
Mounting Orientation:
Frequency Range:
Amplitude Range:
Acceleration Range:
Linearity:
Transverse Response:
Temperature Range:
Thermal Coefficient of Sensitivity:
Shock:
Damped Resonant Frequency:
Excitation:
Coil Resistance:
Insulation Resistance:
Polarity:
Accessories Included:
INSTALLATION
Mounting Rigidly attach the transducer to a clean machined flat surface of the equipment under test using the
appropriate size screws and lock washers. Be sure to tighten the screws securely (20 – 25 in/lb).
Wiring For non-hazardous locations the transducer should be wired according to figure 1 (page 2).
For hazardous locations, the wiring method is dependant on the area classification.
Class 1, Division 2, Groups ABCD T6-T1
EEx nA II T6-T1 X
Transducer may be installed without the use of a safety barrier. Wiring to the transducer must comply
with the safety requirements of the hazardous area in which it is mounted. Reference figure 1 (page
2) for wiring configuration.
Class 1, Division 1, Groups ABCD T6-T1
II 1 G EEx ia IIB or IIC T6-T1:
Transducer may be connected through a safety barrier to the safe area receiver in accordance with
figure 2 (page 3).
CAUTION:
Never apply in excess of 45VDC across the terminals.
700218-25-0006 Rev. X
Type 4-137
VELOCITY VIBRATION TRANSDUCER
Made in the United States of America
60 ±3 mV/ ips (Triangle Base, w/ integral 6 ft. (1.83m) cable)
145 ±3 mV/ ips (Square Base, w/ integral 20 ft. (6m) cable)
145 ±3 mV/ ips (Square Base, w/ integral 10 ft. (3m) cable)
145 ±3 mV/ ips (Square Base, w, integral 14 ft. (4.2m) cable)
105 ±3 mV/ ips (Square Base, w/ integral 3 ft. (.9m) cable)
145 ±3 mV/ ips (Square Base, w/ integral 30 ft. (9m) cable)
At an operational temperature of +900°F the sensitivity will be ≅ -20% of the
stated sensitivity.
Sensitive axis is in longitudinal direction
45 – 2000 Hz
0.1 inch (2.5 mm) pk-pk maximum
1 to 50 g peak vertical
1.5 to 50 g peak horizontal
±5% from 1 to 50 g peak
2% maximum
-40°F to +700°F (-40°C to +371°C)
0.02%/°F from reference +77°F (0.011%/°C from reference +25°C)
50 g
20 Hz nominal
Self-generating
450 ±25% ohms at reference temperature 77°F
1 meg-ohms minimum at +700°F (+371°C)
Pin 2 is positive when case is moved away from base.
Calibration Record
:
1 of 4