Onset Computer Corporation S-UCC-M006 User manual

Pulse Input Adapters (Part # S-UCC/D-M006)
for use with HOBO®H21 and H22 Series Data Loggers
© 2007 Onset Computer Corporation
The Pulse Input Adapters are used to log the number of switch
closures per interval and are designed to work with smart
sensor-compatible HOBO data loggers. The adapter has a
plug-in modular connector that allows it to be added easily to
these loggers. Two versions are available: one for mechanical
contact closures (ideal for connecting tipping-bucket rain
gauges to HOBO H21 series loggers), and one for solid-state
electronic switches (used for connecting compatible pulse
output sensors to HOBO H22 series loggers).
Inside this package
•Pulse Input Adapter
•2 wire nuts
Pulse Input AdapterSpecification
S-UCC-M006
for Electronic Switches S-UCD-M006 for Contact Closures
Maximum Input Frequency 120 Hz (120 pulses per second) 2 Hz (2 pulses per second)
Measurement Range 0 – 65,533 pulses per logging interval
Resolution 1 pulse
Lockout time 45 µs ± 10% 327 ms ± 10%
Recommended Input Type Electronic solid state switch closure or
CMOS-level digital output (example:
FET, opto-FET or open collector)
Mechanical contact closure (example:
reed switch in a tipping-bucket rain
gauge)
Preferred Switch State†Active low input Normally open
Edge Detection Falling edge, Schmitt Trigger buffer (logic levels: low ≤0.6 V, high ≥2.7 V)
Minimum Pulse Width 1 ms
Input/Output Impedance 100 KΩ
Open Circuit Input Voltage 3.3 V
Maximum Input Voltage 3.6 V
User Connection 24 AWG wires, 2 leads: white(+), black(-)
Operating Temperature
Range
-40° to 75°C (-40° to 167°F)
Overall Cable Length 6.5 m (21 ft.)
Housing Weatherproof PVC housing protects input adapter electronics
Housing Dimensions 14 x 0.95 cm (5.5 x 0.375 in.)
Weight 310 g (11 oz.)
Bits per Sample 16
Number of Data Channels 1
Measurement Averaging
Option
No (reports the number of pulses over the logging interval)
Part Number S-UCC-M006 S-UCD-M006
†For maximum battery life, the Pulse Input Adapters should be used with their preferred switch type. The adapters
will work with active high inputs (S-UCC) and normally closed switches (S-UCD), but battery life will not be
optimized.
Part #: MAN-S-UCC/D
Doc #: 11805-A

Pulse Input Adapters
Using the Pulse Input Adapter with the H21-001 HOBO Weather Station or
H21-002 HOBO Micro Station
Connecting the Input Adapter
Typical Setup
The adapter housing should be installed outside the logger enclosure. Be sure to follow the instructions
included with the logger to ensure that the logger is properly sealed where the sensor cable exits the
logger enclosure. Secure the adapter housing to the mast or sensor mounting arm. Excess cable should be
coiled and secured with cable ties.
When making a connection to a third-party sensor, take time to make sure that the connection is reliable.
The connection should be protected from rain, dirt, and direct exposure to the elements. The input cable
can be connected directly to screw terminals on the sensor or to sensor cables with the included wire nuts.
To use the wire nuts, strip about 1 cm (3/8") of insulation from the end of wires, taking care not to nick
the metal conductors. Then, twist the stripped wires together clockwise and then screw on the wire nut
clockwise. Check the connection by gently pulling on the wires to verify a solid mechanical connection.
Always strain-relief the connection to make sure that the connection is not broken by being jerked or
repeatedly worked back and forth.
Installation Considerations
•If sensor cables are left on the ground, use a conduit to protect against animals, lawn mowers,
exposure to chemicals, etc.
•Refer to the HOBO Weather Station User’s Guide or the HOBO Micro Station User’s Guide for
information about setting up complete stations.
Input Connections
The Pulse Input Adapter sensor has two input connections. The white wire (+) is powered at 3.3 V
through a 100 KΩresistor. This power is supplied from the logger’s battery. The black wire (-) is
connected through the adapter to the logger’s ground connection.
Typical Setup of S-UCD-M006 with a Tipping Bucket Rain Gauge or Mechanical Contact Switch
The Contact Closure Pulse Input Adapter (S-UCD-M006) is designed to work with Tipping-Bucket Rain
Gauges and other devices with normally open, mechanical contact closure, switched outputs with a
maximum pulse frequency of 2 Hz. This sensor has a pre-set lockout time of 327 ms and is designed to
work with signals that must be de-bounced to be accurately measured.
Note
•“Bounce” is a phenomenon where a single pulse may contain several false pulses or bounces.
De-bouncing a signal is typically required when measuring signals from mechanical switches,
contact closures, and reed switches.
The lockout time prevents bounce-induced false pulses from being counted as separate switch closures. If
your gauge has a counter display and battery, disconnect them and connect the Pulse Input Adapter in
their place. In most cases, the black and white wires can be connected directly to the relay output. (When
connecting to relay or switch contacts, polarity does not matter.)
Page 2 of 6

Pulse Input Adapters
Page 3 of 6
A typical setup for connecting a sensor with a mechanical switch output is shown below.
Figure 1: 2 Hz Pulse Input Adapter (S-UCD-M006) connected to a device that has a mechanical contact
closure output
Note
•The Pulse Input Adapters consume about 1 µA of current with the input high (switch open) and
about 33 µA with the input low (switch closed). For maximum logger battery life, use the Pulse
Input Adapters with normally open switches or with transducers that are off (circuit open) for
90% of the time or longer.
Connecting to the Logger
To start using the Pulse Input Adapter, stop the logger and insert the adapter’s modular jack into an
available sensor connection port on the logger. If no port is available, use a 1-to-2 sensor connection
adapter (Onset Part # S-ADAPT), which allows you to plug two sensors into one port on the HOBO
Weather Station only. (The HOBO Weather Station supports a maximum of 15 data channels and 15
sensor ports. The HOBO Micro Station supports a maximum of 15 data channels and 4 sensor ports and
cannot be expanded with the 1-to-2 adapters.)
The logger automatically detects the new input adapter the next time you launch it. Launch the logger and
verify that the Pulse Input Adapter is functioning correctly. Refer to the HOBO Weather Station User’s
Guide for more details about connecting HOBO smart sensors to the HOBO Weather Station.
Verifying Functionality
To verify proper operation of the Pulse Input Adapter, connect the adapter to a logger and launch the
logger. With the logger launched, enter a known number of pulses (for example, if using a tipping-bucket
rain gauge, tip the bucket several times). Then read out the logger and verify that the number of pulses in
the data file is correct.
If you think that the Pulse Input Adapter is not capturing pulses, check the connections to the adapter and
verify that the device being measured is functioning normally. If you believe the adapter is not working
properly, you can send the adapter back to Onset for repair. Contact Onset or your Onset Authorized
Dealer for a Return Merchandise Authorization (RMA) number.
S-UCD-M006
Pulse Input Adapter
H21-001 HOBO Weather Station (shown)
or H21-002 HOBO Micro Station
Device with Mechanical Contact Closure Output
(Tipping-Bucket Rain Gauge shown as example)
Sensor
Normally Open
Switch
S-UCD-M006
Pulse Input Adapter
3.3 Volts
100 K Ohms
1 K Ohms
Input Port
GND
White
Black

Pulse Input Adapters
Page 4 of 6
Using the Pulse Input Adapter with the H22-001 HOBO Energy Logger ProTM
Connecting the Input Adapter
Typical Setup
When making a connection to a third-party sensor, take time to make sure that the connection is reliable.
Note: Third-part sensors purchased from Onset, such as WattNode®or Veris pulse output kWh
transducers, are supplied with documentation that provides additional information for system
configuration.
To use the included wire nuts, strip about 1 cm (3/8") of insulation from the end of wires, taking care not
to nick the metal conductors. Then, twist the stripped wires together clockwise and then screw on the wire
nut clockwise. Check the connection by gently pulling on the wires to verify a solid mechanical
connection. Always strain-relief the connection to make sure that the connection is not broken by being
jerked or repeatedly worked back and forth.
Input Connections
The Pulse Input Adapter sensor has two input connections. The white wire (+) is powered at 3.3 V
through a 100 KΩresistor. This power is supplied from the logger’s battery. The black wire (-) is
connected through the adapter to the logger’s ground connection.
Typical Setup of S-UCC-M006 with a FET Switch Transducer
The 120 Hz Pulse Input Adapter (S-UCC-M006) is designed for devices with a normally open solid-state
switch, FET switch or open collector, with a maximum pulse frequency of 120 Hz. This input adapter will
not work with sensors that have mechanical switch outputs, AC outputs, or outputs that must be de-
bounced (see previous section). A typical setup of a FET switch transducer is shown below.
Figure 2: 120 Hz Pulse Input Adapter (S-UCC-M006) connected to a device that has a FET switch output
Note
•The Pulse Input Adapters consume about 1 µA of current with the input high (switch open) and
about 33 µA with the input low (switch closed). For maximum logger battery life, use the Pulse
Input Adapters with normally open switches or with transducers that are off (circuit open) for
90% of the time or longer.
S-UCC-M006
Pulse Input Adapter
3.3 Volts
100 K Ohms
1 K Ohms
Input Port
GND
White
Black
Transducer
Pulse
Output FET
H22-001
HOBO Energy Logger Pro
S-UCC-M006
Pulse Input Adapter
Device with FET Switch Output
(Pulse Output Kwh Transducer shown as example)

Pulse Input Adapters
Page 5 of 6
Connecting to the Logger
To start using the Pulse Input Adapter, stop the logger and insert the adapter’s modular jack into an
available sensor connection port on the logger. If no port is available, use a 1-to-2 sensor connection
adapter (Onset Part # S-ADAPT-5), which allows you to plug two sensors into one port on the HOBO
Energy Logger Pro. The HOBO Energy Logger Pro supports a maximum of 15 data channels.
The logger automatically detects the new input adapter the next time you launch it. Launch the logger and
verify that the Pulse Input Adapter is functioning correctly. Refer to the HOBO Energy Logger Pro
User’s Guide for more details about connecting HOBO smart sensors to the HOBO Energy Logger Pro.
Verifying Functionality
To verify proper operation of the Pulse Input Adapter, connect the adapter to a logger and launch the
logger. If you think that the Pulse Input Adapter is not capturing pulses, check the connections to the
adapter and verify that the device being measured is functioning normally. If you believe the adapter is
not working properly, you can send the adapter back to Onset for repair. Contact Onset or your Onset
Authorized Dealer for a Return Merchandise Authorization (RMA) number.

Pulse Input Adapters
Page 6 of 6
Warranty
This product is warranted to be free from defects in material and workmanship for a period of one year
from the date of original purchase. During the warranty period, Onset will, at its option, either repair or
replace products that prove to be defective. This warranty is void if the Onset products have been
damaged by customer error or negligence, or if there has been an unauthorized modification.
Tune-up Service
Onset will examine and retest this or any other smart sensor or input adapter. A tune up fee may be
charged.
© 2007 Onset Computer Corporation. All rights reserved.
Onset and HOBO are registered trademarks and Energy Logger Pro
is a trademark of Onset Computer Corporation. Other products and
brand names may be trademarks or registered trademarks
of their respective owners.
Part #: MAN-S-UCC/D
Document #: 11805-A