are gauges for air, hydraulics, speed, temperature and
humidity. What about your AC power?
had a machine with a glitch in its process control unit?
Threw a monkey wrench in your plant operation, Right?
it be nice to have a gauge to check to see what really
caused it to lose control?
a PDI on any machine that has been acting strange lately.
See what happened the instant it failed. Before you start
replacing parts, you will know if the PLC or Process Control
unit was affected by some Power Disturbance...and you
won't need an EE degree to figure it out!
HERE for more details...
PDI samples voltage on up to three phases, 64 times every
cycle (0.16) second), constantly updating a large LED display
for each phase. Normal running voltage averages are calculated
to determine a nominal reference voltage.
"SAG" LED lights and stays lit whenever voltage
drops below 80% of the established normal voltage level
during a half cycle.
voltage drops below 50% of normal for one half cycle, a
red "LOSS" LED lights up. Another red LED will
be added for each 50% half cycle voltage loss.
LED lights whenever a "SPIKE" or "SURGE"
a reset button to start monitoring. A green LED lights until
a power variation is detected. Each phase has it's own set
of LED indicators.
Did you know?...
of all plant interruptions are the result of VOLTAGE SAGS, which
last less than two tenths of a second. Lights don't have to flicker
for a machine process control unit to hiccup. Over 60% of voltage
sags involve only one phase. Two phases rarely sag at the same
PDI helps uncover those susceptible "weak links" in
the automated process control systems of today's modern industrial
operations that cause:
Defective End Products
Damaged Power Supplies/Control
Boards Scrap &
you can see if machine alarms occur at the same time you have
a power disturbance. No Programming - No Computer interfacing
-- just turn it on and push the button.
PDI has two modules; a Viewing Display Module and a Power Connection
Module. Both are normally attached. They can also be separated
by up to 100 feet. 10' and 25' Interconnection Cable Assemblies
are optional accessories, as well as custom lengths. A set of
four, color-coded Safety Shroud Test Leads is included. Insulated
alligator clamps on one end make power connections to machine
or power source (main/sub-panel) convenient.
Sampling: 64 times every cycle. Updated every 100ms.
Voltage Range: 120-480VAC; single or three phase; wye or
Button: Clears previous readings. New reading accumulate
until next reset.
(Each phase has its own set of LED's)
LED: Large seven-segment display shows voltage present
LED: No power problems on that phase. Extinguishes when
LED: Any Transient Spike/Surge exceeding 850V peak.*
LED:SAG - Any 1/2 cycle deviation below 80% of reference
LED: LOSS - Any 1/2 cycle deviation lower than 50% of reference
Each module is 8" x 8" x 4" deep. Combined:
8" x 16" x 4"
Red segment lights for each additional half cycle loss up
to ten. *Note: When these LED's light, they stay on until
Plant Electrican Pros Best Friend