OM-50 Series data loggers record
when devices change between on
and off or open and closed states
and store the time, date and state
for each change (the black arrows
in the diagram below show when
data is recorded).
These data loggers have two LED
indicator lights, one red and one
green. One of these LEDs will blink
every two seconds. If the contact is
open or the device is off, the red
LED will blink. If the contact is
closed or the device is on, then the
green LED will blink. Although the
LEDs blink every other second, the
state is checked every half second,
with state changes recorded as
detected. Simply connect the
data logger to your PC using the
RS-232 cable and download stored
data using the Windows software.
Model OM-51 State data logger has
two inputs, a magnetic reed switch
located in the middle of the hinge of
the case (opposite the connectors),
and an external contact closure
input. The data logger records
contact closures/openings of its
internal magnetic reed switch and
contact closures (open/shorted)
in a cable connected to its 2.5 mm
stereo jack. The OM51 data logger detects the
cable's open/shorted condition by
applying a positive voltage pulse to
the tip (white wire in the cable).
Model OM-52 Motor On/Off
Data logger uses an AC magnetic
field threshold sensor to determine
if a motor is on or off. The AC
magnetic field threshold is
approximately 2 Gauss at 60 Hz.
Position the logger so that its green
LED blinks when the motor is on.
is usually best to mount the
data logger on the side of the motor.
MEASUREMENT SPECIFICATIONS
OM-51 STATE DATA LOGGERInputs: two inputs;
a magnetic sensor mounted in the
datalogger and an external cable for
detecting contact closures (external
cable is included). Spacing Between Data logger and
External Magnet:
closed, less than or equal to 3/4";
open, greater than or equal to 3/4"
(external magnet is included) External Contact Input:
passive relay switch or contact
closure
OM-52 MOTOR ON/OFF
DATA LOGGER Sensor Type:
AC field sensor Magnetic Field
Threshold: approx. 2 Gauss at 60
Hz; the logger will typically work
with AC motors drawing 1A or more Mounting:
mount the data logger on or close
to the motor housing or to one
phase of the power line to the
equipment being monitored Angular Response:
the datalogger is sensitive
to that part of the AC field that
is perpendicular to the
data logger's face
GENERAL SPECIFICATIONS
Measurement Capacity:
2000 state changes Time Resolution: 0.5 seconds
Minimum State Duration:
0.5 seconds Memory Modes: stop when full,
wrap-around when full (user
selectable) Memory: non-volatile
EEPROM memory retains data
even if battery fails Operation: blinking LED lights
show current state Time Accuracy: ±1 minute per
week at 20°C (68°F) Operating Temperature: -20 to 70°C (-4 to 158°F) Operating Humidity:
0 to 95% non-condensing Storage Temperature: -20 to 70°C (-4 to 158°F) Power: 3.6 V lithium battery Battery Life: 1 year Dimensions: 2.4"H x 1.9"W x 0.8"D (68 x 48 x 19 mm) Weight: 1 oz (29 g)
† All dollar amounts on this site are shown in US currency.
Note: Data loggers are supplied with complete operator's manual and mounting kit (hook/loop, magnet and tape). Model OM-51 State Data logger includes external magnet and external input cable for detecting contact closures. Ordering Example: (1) OM-51 State datalogger, $76.00
