Home » Maid Labs MLMMD MerMaid Datalogger
Maid Labs MLMMD MerMaid Datalogger
please call (877)766-5412 to confirm
USD (change) 
MerMaid (Motors & Events Recorder) is a three phases X three motors (or other equipment) current, voltage, frequency, digital and analog recorder system. It simultaneously examines all phases at the same time of several electrical equipment and monitors.
It fits where no other recorder will.
Most control panels do not have the internal space or available power required to leave an electrical datalogger inside for a long period of time. Sometimes, to catch an intermittent problem or to monitor specific equipment, there is no choice but to leave an expensive power metering instrument outside an open panel for a long period of time. MerMaid is 5 times smaller than the average power analyzer and will operate for 4 months non stop (under normal conditions) on 2 inexpensive user replaceable internal batteries. With rechargeable batteries, AC power and integrated DIN rail attachment, it’s ideal for permanent installation. An optional internal modem is also available.
Find problems 3 times faster
In some cases, the problem is caused by a sequence of operation of multiple pieces of equipment. It is difficult to find these problems if only one piece of equipment is monitored. Problems are also caused by operator’s behavior, limit switches or when a pressure, temperature or other actions take place. The basic MerMaid (with the appropriate sensors) can monitor the current and frequency for 3 phases on 3 motors, pumps or other electrical equipments simultaneously, plus has 4 digital inputs, 1 analog input and 1 power failure input (when operating on batteries). Power consumption is calculated by entering a voltage in the software or by using an optional external three-phase 600V potential transformer connected to one of the motor input. All of the motor inputs can be converted to 4-20mA, 0-5V, 0-12V or 0-24V with an optional adapter. All inputs are viewed on an optional Palm computer. Windows and Palm software are included.
Simple to use
Designed by electricians for electricians, MerMaid uses intelligent recording based on events or variations to record data, therefore no setting is required eliminating the most common errors. The user simply needs to use the right sensors for its application. MerMaid is so simple to use, most will never read more than the one page quick guide.
What the users have found?
Based on a significant survey including hundreds of MerMaid’s monitored equipment owned by 65 large multinational companies or cities, 32 % of all equipment monitored had multiple abnormal operations every day and another 18% had this problem few times every week. Most of these anomalies were unknown because they were not permanently disturbing the production … yet. Is this the best time to correct these problems?
The Bad:
The Bottom Line:
Full Review
- Fast and easy to use
- No settings
required, simply select the right sensor for the job.
- MerMaid electrical datalogger:
- 9 current / frequency sensors inputs or 6 current + 3 voltage
inputs
- 3 digital inputs, 1 pulse input (low frequency), 1
analog input (4-20, 0-5V set by software), internal temperature and battery
status.
- Power consumption (KVA and KVAH) with optional
external three-phase 600V potential transformer
- 4 months non stop operation on 2 type C alkaline
batteries.
- Up to 15 starts and stops recorded per motor per
second
- Up to 60 changes of state per digital inputs
- All analog values are checked, then compare to values
in memory before being recorded every two seconds or less.
- Roll over memory after 500,000 records. (No one was
able to fill the memory in less than a week in a survey including more than 200
electrical equipments and most would have required more than 3 weeks to do so!)
- Real time data viewed on an optional Palm using infrared communication or serial communication
- Windows and Palm
software
- Kits available
Technical Data |
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|
Inputs |
Motors:
3 three-phase motors, pumps or
other electrical equipment can be monitored simultaneously. Each three-phase
motor input can monitor frequency, current, voltage or be used as an analog
input. Sequence:
1 to 9 electric sensors (current,
voltage or analog) can be connected simultaneously, which greatly helps in
finding problems related to sequence of operation. Current: 9 current sensors can be connected simultaneously (if
not used for anything else). Current sensors not included. Voltage:
1 to 3 three-phase plus ground
670V voltage transformer can be connected simultaneously (if not used for
anything else). (Optional) Motor
operation: Up to 15 starts and
stops can be recorded per second per motor. Frequency: Phase 1 on each motor monitors frequency from 25Hz
to 250Hz through current sensors or voltage transformers. Digital: 3 dry contacts can record 100 changes of state per
second on one input or down to 10 changes of state per second if all inputs
are used Pulse: 1 dry contact, one pulse per 2 seconds Analog: 1 internal single-ended differential 4 to 20 mA or
0-5V, software selectable. Analog
inputs module: adds three 4-20mA,
0-5V, 0-10V or 0-24V inputs connected on any motor inputs (if not used for
anything else). (Optional) Power
Failure: Detected through power
supply or power antenna (when operating on internal batteries) |
|
Outputs |
One
0.5A @ 125VAC relay activated based on one of the following criteria: Current
too high, Unbalance
phase No
communication Frequency
too low Frequency
too high Instrument’s
internal temperature Low
batteries Analog
input |
|
Power
and energy |
Optional
670V voltage transformer required VAR Measurement
range: current clamp dependant Accuracy: current clamp accuracy + ±0.5% for voltage kVARh Measurement
range: current clamp dependant Accuracy: current clamp accuracy + ±0.5% for voltage |
|
Unbalance |
Volts: Measurement
range: 15V – 670V Accuracy: ±0.5% Current: Measurement
range: current clamp dependant Accuracy: Directly related to the accuracy of the sensors
and the location of the wire within the sensor. |
|
Sampling |
Recording
algorithm: Intelligent automatic
recording based on differences between readings and data in memory. Motor
starts and stops: Up to 10 change
of state per second per motor. 2% of the sensor scale is required to record a
start assuming 1.5V output at full range or 0.03V Frequency: every 2 seconds or slower, depending on algorithm Type
of inputs: For each three-phase
motor input, one of the following input type can be selected: Current,
voltage or analog (4-20mA, 0-5V, 0-10V or 0-24V). It records when a variation
higher than 0.8% occurs. Current: every 2 seconds or slower, depending on algorithm Voltage: every 2 seconds or slower, depending on algorithm Analog
input(s): every 2 seconds or
slower, depending on algorithm Pulse
input: one reading every 2 seconds
or slower, depending on algorithm Digital
inputs: 100 changes of state per
second on one input or down to 10 changes of state per second if all inputs
are used. Memory: From 400,000 to 1.5M readings, based on type of
reading. Recording
time: Endless, first in first out. |
|
Palm
Software |
Display
resolution: 320x480, 320x320 and
160x160 Display
type: Touch screen Motor
input screen: 9 bars in one graph
shows the current, voltage for 9 phases on 3 electrical equipment or
frequency for 3 electrical equipment. Minimum, maximum and reset buttons Communication
with datalogger: Infrared, RS-232,
Bluetooth (with optional datalogger module) Analog
input screen: Minimum, maximum and
reset buttons Language: English and French Graph: Paperless type with zoom in and out functions for
17 preset graphs. |
|
Windows
software |
Zoom: From months to one second Basic
graph templates:
User
customizable graphs User
can create its own graph templates with any of the following to appear in any
line type, thickness or color:
Graph
can be saved as jpeg file or copied in memory (to be pasted into a word
processor). Tables User
can select any of the following to appear in a table:
Specified
data can be exported to spreadsheet or database software |
|
Enviromental Specifications |
|
|
Operating
temperature |
-18
°C to +60 °C (0 °F to 140 °F) |
|
Storage
temperature |
-40
°C to +60 °C (-40 °F to 140 °F) |
|
Safety Specifications |
|
|
Electrical
Safety |
Based on current sensors’
specifications |
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Mechanical & General
Specifications |
|
|
Size |
80
H x 65 W x 172 D mm (3 H x 2.5 W x 6.75 D inches) |
|
Weight |
0.45
kg (1 lb) including two C alkaline batteries |
|
Material |
Polyphenylene
oxide |
|
|
4
to 6 months of operation assuming normal use. |
|
Warranty |
1 year |
