Hampshire Controls TT Series User manual

TEMPERATURE TRANSMITTER
OPERATING INSTRUCTIONS
H AMPSHIRE C ONTROLS C ORPORATION
PO Box 516, Dover NH 03821
Tel [phone]
Toll-free [phone]
Fax [phone]
Please Visit Our Web Site!
www.hampshirecontrols.com

Hampshire Controls Corp.
Revision 1.2 Temperature Transmitter Operating Instruction Page 1 of 21
©2014
Limited Warranty
Hampshire Controls Corporation warrants each manufactured item against defects in material
and workmanship, when used as recommended, for a period of one year from original purchase.
Products believed to have such defects must be returned to the factory by prepaid transportation.
Hampshire Controls’ obligation under this warranty is limited to the repair or replacement, at its
option, of those items which upon examination prove to be defective. Such repair or replacement
will be made without charge.
This warranty will be void if repairs or alterations are made or attempted without factory
authorization; or if the item has been subject to misuse, negligence or accident.
Hampshire Controls Corporation assumes no liability for consequential damages of any kind.
The purchaser, by acceptance of the product, assumes all liability of the consequence of its use or
misuse.
Hampshire Controls Corporation makes no other warranty, whether expressed or implied, in
connection with the sale or use of its products.

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Table of Contents
User Interface.................................................................................................................................. 3
Connecting the Antenna.................................................................................................................. 4
Sensor Probe ................................................................................................................................... 5
Probe Installation........................................................................................................................ 5
Probe Location............................................................................................................................ 5
Installing Batteries.......................................................................................................................... 6
Power-up Sequence......................................................................................................................... 7
Connecting to a Network................................................................................................................ 8
Web Configuration Mode........................................................................................................... 8
Operating the Display................................................................................................................... 12
Min/Max Reset.......................................................................................................................... 12
Constant Display....................................................................................................................... 12
Alarm Conditions.......................................................................................................................... 13
Temperature Alarms ................................................................................................................. 13
Door Switch Alarm (Optional) ................................................................................................. 14
Battery Low Condition ............................................................................................................. 14
Communication Fault................................................................................................................ 14
Programming Mode...................................................................................................................... 15
Calibration Mode.......................................................................................................................... 17
One-Point Calibration (Offset) ................................................................................................. 17
Two-Point Calibration (Offset & Slope)................................................................................... 18
Specifications................................................................................................................................ 19
Care and Cleaning......................................................................................................................... 19
Acronyms & Definitions............................................................................................................... 20
Revision History ........................................................................................................................... 21

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User Interface
The user interface of the Temperature Transmitter consists of the following:
•3.5 digit LCD
•Alarm & Status LED (STATUS)
•Audible alarm indicator (buzzer)
•Display, program & increment button (DISP/PROG)
•Mute (silence), calibrate & decrement button (MUTE/CAL)
•Reset button (RESET)
Throughout this manual you will encounter the following instructions for operating the buttons
on the user interface:
Tap Briefly press and release the button.
Press-and-hold Press the button and continue to hold it in its pressed state until instructed
otherwise.
Release Release the button from its pressed state.

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Connecting the Antenna
Carefully thread the included antenna onto the connector located on the upper left side of the
Temperature Transmitter case. Tighten the connection with your fingers, no tools are required.
Flex and rotate the antenna to an upright position as shown below.

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Sensor Probe
The probe supplied with the Temperature Transmitter is a highly accurate temperature sensor.
The sensor may be put in water or other mild aqueous solutions from 0°C to 100°C.
NOTE: Avoid submerging the probe in solvents or harsh chemicals. Use protective thermo-
wells when monitoring such materials.
NOTE: The warranty does NOT cover damage to probes or electronics that is caused by
exceeding temperature limitations, or damage to probes caused by using them in solvents
or other unsuitable environments.
NOTE: If the displayed temperature shows a consistent high (> 100°C) or low (< -100°C) value,
most likely, the probe has failed. The unit must be returned for probe replacement and
recalibration.
Probe Installation
The probe may be used in air or in simulated product.
If installing the sensor in a refrigerator, try to place the probe in a water and glycol chlorine
solution to stop bacteria formation.
If installing the sensor in a cabinet or enclosure (particularly freezers), make sure to use good
techniques to prevent room moisture from getting into the cabinet. Whenever possible, install the
probe through an existing access port provided by the cabinet manufacturer, then reseal the port.
Alternatively, the probe can be run under, over, or through the door-sealing gasket. Often a door
gasket will have a joint at one or more corners. Open that joint slightly by carefully making a slit
with a razor blade. Insert the probe wire and then reseal the joint with flexible silicone sealing
compound. Inside the cabinet, run the probe wire so that it will not become snagged during
loading, unloading or cleaning procedures.
Probe Location
Install the sensor probe in a location where it will respond to the average temperature of the
space being monitored and not to local conditions caused by door openings, etc.
The object of the probe location is to provide some safety for the area being monitored without
generating “false” or nuisance alarms. For example, locating the sensor probe on the bottom of a
chest freezer will result in the alarm being sounded later than if it was located near the top.
However, locating the sensor too close to the top of the chest freezer could result in the alarm
being sounded due to routine lid opening. Choose a probe location that offers the safety desired
for the enclosure contents.

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Installing Batteries
The Temperature Transmitter uses three AA sized batteries. For optimum battery life Hampshire
Controls Corp. recommends using lithium batteries such as Energizer Ultimate Lithium (L91) or
equivalent. The Temperature Transmitter will operate for approximately one year on a fresh set
of L91 batteries under normal operating conditions. High quality alkaline batteries may be used,
but with moderately decreased lifetime.
NOTE: The following conditions will shorten battery life.
•RF interference or congestion in the 2.4GHz band (Wi-Fi).
•Excessive time spent in an alarm state (flashing LED & chirping buzzer).
•Excessive time spent in the Web Configuration or Calibration modes.
•Excessive use of the LCD display (see Constant Display on page 12).
The battery orientation is shown in the diagram below.
BE CAREFUL TO INSERT THE BATTERIES IN THE PROPER ORIENTATION!
Do not mix batteries of different ages, types, or manufacturers!

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Power-up Sequence
There is no on/off switch on the Temperature Transmitter. The device will turn on when all
three batteries are inserted. The power-up sequence takes about 20 seconds, during which the
device will go through the following states:
For the first 10 seconds the LCD will show all segments and the STATUS LED will be solid red
. During this interval the device can be put into Web Configuration Mode or Calibration
Mode by pressing and holding the DISP/PROG or the MUTE/CAL button respectively. These
two modes are described later in this document.
If no buttons are pressed, after the 10 second delay has elapsed, the device will start its boot
procedure. The buzzer will emit a short beep and the LED will change to green . The Wi-Fi
electronics will power-up, and the unit will try to connect to the network SSID which was
entered during the Web Configuration. During the connection attempt the STATUS LED will
quickly flash green . If the connection is successful, the LED will slowly flash green 3
times … … and then turn off. If the connection fails, the LED will blink red once
every 5 seconds, until the next connection attempt (every 60 seconds).
NOTE: See Connecting to a Network (page 8) if the Temperature Transmitter fails to connect
on initial power-up.
If the Wi-Fi connection was successful, the LCD will display the following sequence:
The initials of Hampshire Controls Corp.
The firmware version number.
The current battery (cell) voltage.
Finally the current probe temperature.
Each value will be displayed for three seconds. After displaying the temperature, the LCD will
turn off (blank display). The device is now in its operational state. During normal operation the
probe temperature will be read, and a wireless temperature transmission will take place, every 3
minutes.

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Connecting to a Network
If your Temperature Transmitter was not factory-configured to connect to your wireless (Wi-Fi)
network, you will need to perform this configuration step yourself. This section describes the
method used to configure the network connection settings of the Temperature Transmitter.
Web Configuration Mode
In order to use the Web Configuration Mode, you will need a wireless device such as a laptop
computer or a smartphone capable of connecting to an IEEE Standard 802.11B/G wireless
network. Your wireless device must be configured to obtain its IP address using DHCP (see
your devices manual, on-line help, or an IT professional for instructions).
If you have installed the three provided AA batteries in your Temperature Transmitter, it will be
powered on. To enter the Web Configuration mode you must tap the RESET button. The
STATUS LED will illuminate red . When this occurs, immediately press-and-hold the
DISP/PROG button until the STATUS LED starts flashing red and green . Release the
DISP/PROG button. When the STATUS LED stops flashing and turns green the sensor is in
Web Configuration mode.
Now, on your wireless device, go to the wireless
network configuration and search for new wireless
networks. You should see a network with an SSID
similar to HCC-0B73F2, where the last six
characters will be a random sequence containing 0-
9 and A-F. Connect your device to this network as
shown in the adjacent image.

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Once your device is connected and has been
assigned an IP address, open a web browser and
enter HTTP://192.168.1.1 into the address bar and
press the ENTER key or click the GO button.
The Temperature Transmitter will now serve you
its main configuration page, which will look like
the image shown to the left.
To configure the wireless network settings on the
Temperature Transmitter click on Set Wi-Fi Access
Point.
This page also lists the sensors MAC address,
which may be required by some network
administrators to enforce security settings.
Depending on your device options, this menu may
have other options.

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Type in the SSID for your wireless network, then
select the proper security settings and enter the
network passphrase.
Contact your System/Network Administrator or IT
professional for any assistance with these settings.
For your convenience, the Temperature Transmitter
performs a network search prior to serving this
page. Any detected networks are displayed under
Available Networks.
Click on Save Settings when you are finished. You
will be returned to the main menu. Select Set IP
Configuration to continue with the network setup.
On this page you must first select “Use static IP”.
After selecting “Use Static IP” you must fill in the
Static IP, Subnet, Gateway, and DNS Server fields.
DHCP is NOT currently supported!
Contact your System/Network Administrator or IT
professional for any assistance with these settings.
Finally, you must enter the IP Address of the
T°Sentry ALERT System server in the
Monitoring System IP field.
Click on Save Settings when you are finished. You
will be returned to the main menu. Select Alarm
and Display Settings to configure the Temperature
Transmitter Unit ID and temperature alarm limit
setting.

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This is the final step in the Web Configuration.
First select a unique 5 character Unit ID. This will
identify the Temperature Transmitter on the
T°Sentry ALERT System server.
You may then change the other alarm and display
options (See Programming Mode, page 15, for
more information).
Select Save Settings when you are done. Select
Reboot the module from the main menu or tap the
RESET button to reboot the Temperature
Transmitter.
Depending on your device options, this menu may
have other options.
If the Temperature Transmitter fails to connect to your network after the initial Web
Configuration, you should first repeat the Web Configuration to verify that the settings you
entered were correct. Some common mistakes are incorrect case in the SSID or network
password, or mistyping values on the IP configuration page.

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Operating the Display
You may view the current temperature on the display at any time by tapping the DISP/PROG
button. Tapping the button repeatedly will sequence through the following readings:
The current temperature.
The minimum temperature since the last RESET.
The maximum temperature since the last RESET.
Finally the average battery (cell) voltage during the past
hour. Nominal cell voltage should range from about 1.150 to
1.800 for AA size 1.5V Alkaline or Lithium batteries. At
voltages near 1.150, the low battery alarm will be activated.
If the DISP/PROG button is tapped again it will cycle back to the current temperature. If the
button is not tapped for a period of 5 seconds at any time, the display will turn off.
NOTE: The “current” temperature is updated every three minutes during normal operation, just
prior to the wireless temperature transmission. Pressing the DISP/PROG button does not cause
the sensor to take a new probe temperature reading.
Min/Max Reset
The minimum and maximum temperature readings can be reset by pressing-and-holding the
MUTE/CAL button at any time during the normal operating mode. You may release the
MUTE/CAL button after you hear a short beep. The min/max values will also be cleared when
the RESET button is pressed, or when the batteries are changed.
Constant Display
If you would like to have continuous display of the current probe temperature, the option is
available. To toggle the constant display setting, you first must enter the Programming Mode
(see page 15) by pressing-and-holding the DISP/PROG button for 5 seconds, until you hear a
short beep. Release the DISP/PROG button and then press-and-hold the MUTE/CAL button for
5 seconds. After you hear one beep for enable or two beeps for disable, you may release the
MUTE/CAL button. Program Mode will exit and the display will either be blank, or will
continuously display the current temperature, updated every three minutes.
Battery life will be decreased by approximately one month when using this feature.

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Alarm Conditions
Temperature Alarms
The Temperature Transmitter has programmable low and high temperature limits as well as an
alarm delay time which control when the alarm indication is activated. The alarm conditions are
checked every 3 minutes following each new temperature reading. Alarm processing is based on
the following flowchart.
The local temperature alarm is indicated by a triple beep from the buzzer and 5 slow red flashes
… … … … of the LED repeated every 15 seconds.
NOTE: Depending on the configuration of the T°Sentry ALERT System software, alert messages
may be sent before, after, or at the same time (within 3 minutes) as the Temperature Transmitter
local alarm.

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Door Switch Alarm (Optional)
A dry-contact switch input is available as an option on the Temperature Transmitter. Normally
this input is used in conjunction with a magnetic reed switch mounted to a refrigerator or freezer
door. If the door is left open for an unusually long period of time, an alarm condition is
generated. The switch input can be used with either normally open (NO) or normally closed
(NC) contacts. The door switch alarm uses the same delay time as the low/high temperature
alarms. The door switch alarm is indicated by a double beep from the buzzer and 5 slow red
flashes … … … … of the LED repeated every 15 seconds.
NOTE: Depending on the configuration of the T°Sentry ALERT System software, alert messages
may be sent before, after, or at the same time (within 3 minutes) as the Temperature Transmitter
local alarm.
Battery Low Condition
The Temperature Transmitter constantly monitors the state of the batteries. When a low battery
level is detected a “battery low” notification is added to the Wi-Fi transmissions. The T°Sentry
ALERT System will then send “battery low” warning messages to those on the Temperature
Transmitter contact list. The battery low condition is also indicated locally by a single beep from
the buzzer and 5 red flashes on the STATUS LED repeated every 15 minutes.
Communication Fault
As with any wireless communication system, disruptions can sometimes occur. The
Temperature Transmitter can detect some disruptions and try to reestablish the connection to the
network. However, if the interference or outage prevents the Temperature Transmitter from
reconnecting to the network, the T°Sentry ALERT System will send “communication failure”
alerts to those on the Temperature Transmitter contact list if no data has been received from the
Temperature Transmitter for 20 minutes or more.
There is no defined local alarm for this condition. However, during reconnect attempts, the LED
quickly flash green , and then slowly flash green 3 times … … or blink red
once every 5 seconds to indicate connection or failure to connect. If you witness this, there may
be a network connection problem.
Certain communication faults may cause the unit to reset. If this occurs, the Temperature
Transmitter will go through the full power-up sequence discussed on page 7.
NOTE: If communication faults occur too frequently under normal operating conditions,
installation of additional Wireless Access Points (WAP) may be required. The WAPs should be
strategically placed to minimize the overall distance between each Temperature Transmitter and
its nearest WAP. Additionally, a wireless site survey should be conducted periodically to
determine the optimal settings for the wireless network, and to decrease the likelihood of
interference due to nearby networks.

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Programming Mode
To enter Programming Mode press-and-hold the DISP/PROG button for 5 seconds. You will
hear a beep. The LCD will turn on and show the following:
This indicates that you are about to change the Low
Temperature Alarm Limit. If you tap either the
DISP/PROG button or the MUTE/CAL button the current
Low Temperature Alarm Limit will be displayed on the
LCD.
To increase the low limit tap the DISP/PROG button, to
decrease the low limit tap the MUTE/CAL button. When
you are finished, or if you do not want to change the
value, simply wait. If no buttons are tapped for 5
seconds, the current value will be saved and the next
option will be displayed.
This indicates that you are about to change the Low
Temperature Alarm Limit. If you tap either the
DISP/PROG button or the MUTE/CAL button the current
Low Temperature Alarm Limit will be displayed on the
LCD.
To increase the high limit tap the DISP/PROG button, to
decrease the high limit tap the MUTE/CAL button. When
you are finished, or if you do not want to change the
value, simply wait. If no buttons are tapped for 5
seconds, the current value will be saved and the next
option will be displayed.
This indicates that you are about to change the Alarm
Delay (in minutes). If you tap either the DISP/PROG
button or the MUTE/CAL button the current Alarm Delay
will be displayed on the LCD.
To increase the alarm delay tap the DISP/PROG button,
to decrease the alarm delay tap the MUTE/CAL
button.
When you are finished, or if you do not want to change
the value, simply wait. If no buttons are tapped for 5
seconds, the current value will be saved and the next
option will be displayed.
This indicates that you are about to change the Alarm
Mute or Silence Period (in minutes). If you tap either the
DISP/PROG button or the MUTE/CAL button the current
Silence Period will be displayed on the LCD.

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To increase the silence period tap the DISP/PROG
button, to decrease the silence period tap the MUTE/CAL
button. When you are finished, or if you do not want to
change the value, simply wait. If no buttons are tapped
for 5 seconds, the current value will be saved and the
next option will be displayed.
This indicates that you are about to change the Door
Switch Alarm Polarity. If you tap either the DISP/PROG
button or the MUTE/CAL button the current Switch
Polarity will be displayed on the LCD.
The door switch alarm polarity options are Alarm on
OPEN or Alarm on CLOSED indicated by the two LCDs
shown to the left. Alarm on OPEN indicates that the
alarm will be triggered when the contacts of the switch
are open-circuit. Tap either the DISP/PROG or
MUTE/CAL button to toggle between the two options.
If your Temperature Transmitter does not have the Door
Switch option, this value must be set to .
This indicates that you are about to change the
temperature display to either degrees Celsius or degrees
Fahrenheit. If you tap either the DISP/PROG button or
the MUTE/CAL button the current selection will be
displayed on the LCD.
Tap either the DISP/PROG or MUTE/CAL button to
toggle between the two options.
This indicates that you are about to change the
calibration method to either one point or two points. If
you tap either the DISP/PROG button or the MUTE/CAL
button the current selection will be displayed on the
LCD.
1Pt is for field calibration using a single known
temperature. 2Pt is primarily for factory calibration at
0°C and 40°C. Tap either the DISP/PROG or
MUTE/CAL button to toggle between the two options.
After the 5 second timeout following the CAL mode programming, any modified settings will be
saved, the display will turn off and the device will return to its normal operation.
You may exit Program Mode at any time by pressing-and-holding the DISP/PROG button for 5
seconds. You will hear two short beeps and the display will turn off. MODIFICATIONS TO
THE SETTINGS WILL NOT BE SAVED!

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Calibration Mode
Calibration Mode is entered by pressing-and-holding the MUTE/CAL button during the 10
second power-up delay. If the Temperature Transmitter is in its normal operating mode, you
must first tap the RESET button. The STATUS LED will illuminate red . When the STATUS
LED illuminates, immediately press-and-hold the MUTE/CAL button until the STATUS LED
turns off. Release the MUTE/CAL button. The LCD will turn on and may display either the
current temperature or the current analog-to-digital converter (A/D) reading.
It is recommended to change the temperature display to °C in the Sensor Settings before
beginning any calibration.
One-Point Calibration (Offset)
If One-Point Calibration (1Pt) has been selected, the LCD will display the current probe
temperature. The temperature readout will update every half second. To change the calibration
of the sensor you can tap the DISP/PROG button to increase the sensor readout or the
MUTE/CAL button to decrease the sensor readout until it matches the reading of a calibrated
thermometer. Each button tap adjusts the calibration offset by 0.05°C. The decimal digit on the
LCD may flicker ±0.1°C, this is within the accuracy limits of the Temperature Transmitter.
Once you are satisfied with the temperature reading on the LDC, press-and-hold the DISP/PROG
button until you hear a beep. Release the DISP/PROG button and then tap the RESET button to
re-boot the sensor. The sensor will use the new calibration offset when it restarts.
For best results, the sensor probe and the calibrated thermometer probe should be in very close
proximity. Both probes should be immersed in, and acclimated to a liquid of uniform
temperature. The temperature of the calibration medium should be close to the expected nominal
probe temperature of the sensors intended application (i.e. room, refrigerator or freezer
monitoring).
If you find that the sensor reading is correct at the calibration temperature but incorrect at a
higher or lower temperature, the sensor will require a Two-Point Calibration (2Pt) using the
method described in the following section. If you do not have the equipment to perform the
Two-Point Calibration, contact Hampshire Controls Corp. to arrange for factory recalibration.
Performing the One-Point Calibration at two different temperatures does not constitute a Two-
Point Calibration. Only the most current One-Point Calibration value is stored.

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Two-Point Calibration (Offset & Slope)
If Two-Point Calibration (2Pt) has been selected, the LCD may display either the current
temperature or the current value of the A/D in hexadecimal (hex) format. The display will
update every half second. To toggle between temperature and hex tap the MUTE/CAL button.
An example of both readouts is shown below.
Temperature display is easily noted by the decimal point.
Hexadecimal display may contain the numbers 0-9 and
the letters A-F.
During Two-Point Calibration you can also activate the ±0.1°C hysteresis that is used during
normal operation to stabilize the temperature readout. Hysteresis is indicated by the tilde symbol
on the display.
For field calibration, select the temperature readout and turn off hysteresis.
Now immerse the probe into a water bath at 0°C. Verify the water bath temperature using a
calibrated thermometer. Let the Temperature Transmitter temperature reading stabilize. The
decimal digit may flicker ±0.1°C. When you are satisfied that the reading on the Temperature
Transmitter has stabilized, press-and-hold the MUTE/CAL button until you hear a short beep,
then release the button. You have now set the zero-degree offset.
The readout should now display ±0.1°C.
Next, immerse the probe in a 40°C water bath. Verify the water bath temperature using a
calibrated thermometer. Let the Temperature Transmitter temperature reading stabilize. The
decimal digit may flicker ±0.1°C. When you are satisfied that the reading on the Temperature
Transmitter has stabilized, press-and-hold the DISP/PROG button until you hear a short beep,
then release the button. You have now set the forty-degree point.
The readout should now display ±0.1°C.
Return the probe to the 0°C water bath and verify the reading is still acceptable. Tap the RESET
button to return the Temperature Transmitter to normal operation.
If the STATUS LED starts to flash red at any time during the calibration, then the
Temperature Transmitter requires a factory recalibration. Please contact Hampshire Controls
Corp. to arrange for recalibration. Tap the RESET button to exit the Calibration Mode.

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Specifications
Power Requirements: Three 1.5V AA Batteries, approximate battery life is 1 year
Sensor: 100 ohm RTD in 4” s.s. sheath, waterproof, with 10’ Teflon 22 ga.
twisted pair
Temperature Range: -100 to +100°C (-148 to +212°F)
Resolution: Centigrade display: 0.1°C (over full range)
Fahrenheit display: 0.2 °F (-148 to +199.8°F), 1.0°F (+200 to +212°F)
Accuracy: ±0.2°C (±0.36°F)
Mechanical: Case is black ABS plastic, 4”w x 4”h x 1.6”d
Wall mount with Velcro, or set on bottom edge
Wires and antenna exit through sides
Outputs: Wi-Fi (IEEE Std. 802.11b/g) transmission via UDP/IP every 3
minutes (Requires Hampshire Controls T°Sentry ALERT System
software)
Special Options: Dry contact input for use with a magnetic reed switch
Care and Cleaning
The Temperature Transmitter case is not watertight. Avoid spilling liquids on the case, as it
could cause damage to internal electrical components.
When cleaning the case or the LCD display, use only a soft, lint-free cloth, which is dry or
slightly moistened with water. Avoid using alcohol or any harsh chemicals.