Troubleshooting And Repair; Specifications - Emerson Fisher FLOBOSS 407 Instruction Manual

FloBoss 407 Instruction Manual
A.5 TROUBLESHOOTING AND REPAIR
The lightning protection modules function by shunting the high voltage transients through gas discharge
tubes to the ground lead. In the event of an I/O signal failure, verify the signal is not interrupted by the
LPM. Proceed to the troubleshooting and repair procedures for I/O in previous sections of this manual.
Before removing an LPM, make sure all devices and processes remain in a safe state. Remove the
LPM and disconnect the field wiring. Remove any range resistors from the LPM. With a digital
multimeter, verify continuity through each connector socket to the corresponding field wiring terminal.
If there is no continuity, replace the LPM.
With a digital multimeter, check each of the input terminals for continuity to the ground lead. If the test
shows continuity to the ground lead, replace the LPM.
A.6 SPECIFICATIONS
The following specifications are for the LPM.
ELECTRICAL Series Resistance: 10 ohms from
input to output, each terminal.
DC Clamping Voltage: 72 to 108
volts.
100 V/ms Impulse Clamping
Voltage: 500 volts maximum.
Clamping Release Voltage: 52
volts minimum.
10 KV/microsecond Impulse
Clamping Voltage: 900 volts
maximum.
Surge Life: Module can withstand
300 surges of 10 to 1000 micro-
seconds duration at 500 amps
minimum.
Insulation Resistance: 10,000
megohm minimum.
Capacitance: 1.0 picofarad
maximum
A-4

Specifications

1 MHz, each terminal.
@
CASE Material: ABS polycarbonate
thermoplastic.
Dimensions: 0.65 in. H by 0.84
in. W by 1.58 in. D (17 mm by 21
mm by 40 mm).
Length of Ground Wire: 48
inches (1.2 m) nominal.
SURGE
Meets surge requirements
WITHSTAND
CCITT K17-K20.
ENVIRONMENTAL
Operating Temperature: -40 to
75 °C (-40 to 167 °F).
Storage Temperature: -60 to
100 °C (-76 to 212 °F).
Operating Humidity: To 95%
relative, non-condensing.
WEIGHT 1.2 ounces (34 grams).
Approved by CSA for hazardous
APPROVALS
locations Class I, Division 2,
Groups A, B, C, and D.
Rev 5/00