Supco KTH User Manual

CR4-KTH RECORDER

WITH TEMPERATURE/HUMIDITY DEW POINT SENSOR

The CR4 is a precision, multifunction chart recorder. With the KTH sensor kit, the
CR4-KTH becomes a temperature, relative humidity and dew point recorder with
a digital display. The recorder was designed with the user in mind. No special
knowledge is required to operate the CR4-KTH. The menu driven setup is logi­cally simple and user friendly. All parameters are shown on a two line alphanu­meric LCD display. The backlighting of the display enhances visibility under
marginal lighting conditions.

The CR4-KTH uses two independent pens and records information on a 6 inch
circular chart. Each pen is uniquely colored to maximize chart readability. The
rotation of the chart may be set to Single Turn or Continuous.

In addition, a full function alarm feature is provided. The alarm of the CR4-KTH
can be set to sound an audible signal when the temperature and/or humidity has
exceeded an upper or lower limit. Each limit is individually set from the front
panel. A delay time before the alarm is activated may be set by the user to pre­vent nuisance alarms. Low power normally open relay contacts are provided to
allow activation of a remote alarm, phone dialer or annunciator. An optional RS­232 port allows connection to a computer for data logging or monitoring pur­poses.

Power is supplied through a 120VAC 50/60 Hz. plug-in adapter. External power
may be supplied from any 12VDC source such as automotive, marine, or other
battery. Battery backup for 48 hours is featured to provide operation during tem­porary power loss.

All functions of the CR4-KTH are accessed through five pushbuttons located on
the front panel. Selectable functions are retained in a memory to avoid re­entering settings in the event of a power failure.

QUICK START

1. Connect power supply to CR4-KTH through jack on right side of unit.

2. Plug power supply into 120VAC outlet.

3. Press ON button.

4. Pens will move to the "Home" position. (The outermost part of the chart.)

5. Pens will move to a position on the chart according to the display read­ ing. This is called the RUN Mode. (Unit is always in the ON or RUN
Mode when display is showing temperature, humidity and Dew Point
readings.)

MENU OR RUN?

The CR4-KTH has two basic modes of operation:

MENU mode. To review or change settings.
RUN mode. To display present conditions and record them.

If MENU mode is selected, the user can:

Set Chart Speed/Range.
Set red pen to record Temperature or Dew Point.
Set Single or Continuous Chart Rotation.
Set Alarm Status (Alarm delay section of MENU will not show when the
alarm is disabled.):

Alarm Delay = 0
Alarm Delay = 10 Minutes /20 Minutes /1 Hour /2 Hours

If the ALARM is enabled, the following menu selections will be available:

Set Temperature High Limit
Set Temperature Low Limit.
Set Humidity High Limit.
Set Humidity Low Limit.
After menu setting, unit will automatically go into the RUN Mode after 30
seconds.

If the RUN mode is selected: The display will show Temperature, Humidity,
and Dew Point.

While in the RUN mode, the user can:

Home the pens by pressing the HOME switch. (Allows for easy changing
of charts and pens.)
Set blue pen position.
Set red pen position.
Advance the chart by pressing the ADV button. (To match present time
with chart.)

How to Change the Chart

1. Press the HOME button to move the pens to the outer edge of the chart.

2. Lift the pens with the lever. (Just enough to lift the pens from the chart.)

3. Remove the old chart.

4. Install the new chart on to the spindle.

5. Rotate the chart to the starting point with the ADV button.

6. Lower the pens.

7. Press the MENU button. This will put Recorder in the RUN Mode.

8. If the pen(s) position needs adjustment, see Pen Adjustment section
below.

CHART SPEED AND RANGE

The CR4-KTH offers 42 combinations of Chart Ranges and Chart Speeds to
match a wide variety of applications. All functions of Chart Speed and Chart
Range have been combined in one menu to make the necessary selections as
easy and as fast as possible. A further aid to the user is the Supco chart number
shown on the display for any combination of Chart Range and Chart Speed.

Chart Speed is the term used to describe the time it takes for the recording chart
to make one complete revolution. Different applications will require different
chart speeds. For example, the 31 day chart would generally be used where
long term monitoring is required and frequent changing of the charts would be
undesirable. The main disadvantage of this is that short-term variations in tem­perature or humidity will record as a single line or step on the chart. In applica­tions that have wide short-term temperature or humidity variations the user may
prefer a faster chart speed for more accurate analysis. The fastest chart speed is
one revolution in 1.5 hours. This allows the user to record short-term variations
in temperature and humidity in great detail. An example of this would be to test
the defrost cycle in a frost free freezer or to observe the settling time of a tem­perature control system. Chart Range can be selected by the user for °F or °C. It
is important to remember to place the appropriate chart on the recorder when
changing from °F to °C or vice versa. The recorder will retain this information
even when the power is disconnected or the unit turned off.

If the measured temperature is out of range (for the chart selected), the display
will read the actual temperature, but the pen will not go beyond limit of the chart.

How to Set the Chart Speed and Range

1. While in the RUN mode, press the MENU button. This will show the Beeper is
ON (OFF) message. Press the MENU button again and the display will pres

ent the setting for chart speed.

2. To select a longer chart speed, press the A button, for shorter chart speeds
press the B button. Each time the A or B button is pressed, the speed will
change. Whatever speed is on the display will become the chart speed. The
available chart speeds are:

1.5 Hrs. 6 Hrs. 24 Hrs. 31 Days
3 Hrs. 12 Hrs. 7 Days

3. Press the MENU button again to go to the chart selection menu. To change
the chart range and chart number, press the A or B button. Each time the A or
B button is pressed, the range will change. Whatever range is on the display
will become the chart range. Note that the chart number is displayed with the
chart range for the user’s convenience. The chart ranges available are:

-20°F to +120°F -20°F to +50°F +40°F to +110°F
+5°C to +45°C -30°C to +10°C -30°C to +50°C

4. Press MENU to proceed in MENU Mode or press B to return to the RUN
mode. If no button is pressed for 30 seconds, the recorder will auto-

matically return to the Run mode.

RED PEN MODE

The red pen may be used to record Temperature or Dew Point. The blue
pen will always record Relative Humidity.

How to Select Red Pen to Record Temperature or Dew Point

1. Press MENU until "Red Pen = " message appears.

2. Press A to toggle between Temperature and Dew Point, Press B to go to
RUN mode or MENU to continue in MENU Mode.

How to set Single Turn or Continuous Chart Rotation

The recorder can be set to rotate the chart continuously or stop after one revolution.

1. Press MENU until "Single Turn or Continuous" message appears.

2. Press A to toggle between Single and Continuous.

3. Press B to go to RUN Mode.

4. Press MENU to continue in MENU Mode.

ALARM AND DELAY

When temperature, humidity or both measurements pass above or below the
thresholds set in the menu function, the CR4-KTH will execute a preset opera­tion. This operation is described as an Alarm condition or a Delay condition and
is referred to simply as Alarm or Delay.

Alarm indicates that one or both measurements are above or below the preset
thresholds and the CR4-KTH is sounding the audible alarm and has closed the
relay contacts. The display will also be flashing the parameter that has caused
the Alarm condition.

Delay is a condition in which one or both thresholds have been passed, but the
audible alarm and relay contacts are not activated for a preset delay time. Delay
is used to prevent nuisance and false alarms.

Example:

In the normal operation of an environmentally controlled chamber the door will
be periodically opened to access the contents within. When this happens warm
humid air will enter the chamber causing a momentary increase in temperature
and relative humidity. Without the Delay function this would cause a false alarm
indicating a controller failure when in fact no failure has occurred.

The Delay can also be used to prevent nuisance alarms on coolers or similar
devices which have frequent door openings. Without the Delay function an
alarm would be started as a result of a short term increase in temperature
caused by the door being opened and again no failure of the system has oc­curred.

The CR4-KTH allows the user to select one of five Delay times, Zero Delay, 10
minutes, 20 minutes, 1 hour or 2 hours. The Delay time selected will depend on
the application and will vary from installation to installation. It is up to the judg­ment of the user to determine the best Delay time for a given application. When
a Delay time of zero is selected the Delay function is disabled. When a tem­perature or humidity threshold is passed the audible alarm and relay contacts
will close immediately. When a Delay time other than zero is selected the audible
alarm and relay contacts will not activate until one or both temperature and hu­midity thresholds have been exceeded continuously for the period of the Delay
time. The display will flash the parameter which has caused the Delay condition
to alert the user that one or more thresholds have been passed. At the end of
the Delay time the audible alarm will sound and the relay contacts will close.

How to Silence the Alarm: (Relay contacts remain closed.)

1. Press MENU and the display will show "DISABLE ALARM "
message.

2. Press A to turn off alarm (only sound will be turned off, relay will
remain closed.)

3. Press B to turn alarm (sound) on.

4. Press MENU to continue in MENU Mode.

In RUN Mode:
If a temperature limit has caused the alarm, the temperature reading will
blink until the condition returns to normal.

If a humidity limit has caused the alarm, the humidity reading will blink until
the condition returns to normal.

When the condition that caused the alarm is no longer present, the alarm and
relay will be reset, the display will stop blinking and the alarm will be automati­cally reset. To disable the relay contacts and the blinking parameter(s), the
alarm must be disabled. See How to Set the Alarm and Delay below.

How to Set the Alarm & Delay

1. Press MENU button until alarm status message appears.

2. Press button A to scroll through options:
Zero Delay 20 Min. Delay 2 Hour Delay
10 Min. Delay 1 Hour Delay Alarm Disabled

(If the alarm is disabled, you must enable the alarm to get the delay sec­tions of the MENU.)

3. Press B to go to RUN Mode or MENU to continue in MENU Mode.

TEMPERATURE AND HUMIDITY LIMITS

The Temperature and Humidity Upper and Lower Limits allow the user to cus­tomize the alarm settings of the CR4-KTH to provide the greatest degree of pro­tection while at the same time preventing unnecessary alarms. Since each appli­cation is unique, careful selection of the temperature and humidity thresholds
are required to provide the maximum degree of protection. Both Temperature
and Humidity high and low limits may be set. If the alarm is enabled, and any of
these limits are exceeded, the display will blink the reading that went beyond the
limit. An audible alarm (Beeper) will sound and the relay contacts will close after
the delay time has elapsed. If the alarm is not disabled, any of the four limits
could trip the alarm, therefore all upper and lower limits must be set.

SETTING THE LIMITS

How to Set the Temperature High Limit

1. Press MENU until "Temperature High Limit" appears.

2. Press A to increase the limit, B to decrease the limit, or MENU to go to
the Temperature Low Limit. The A or B button can be held down contin­ uously to scroll the set point.

How to Set the Temperature Low Limit

1. Press MENU until "Temperature Low Limit" appears.

2. Press A to increase the limit, B to decrease the limit, or MENU to go to
Set Humidity High Limit.

How to Set the Humidity High Limit

1. Press MENU until "Humidity High Limit" appears,

2. Press A to increase the limit, B to decrease the limit, or MENU to go to
Set Humidity Low Limit.

How to Set the Humidity Low Limit

1. Press MENU until "Humidity Low Limit" appears.

2. Press A to increase limit, B to decrease limit.

3. Press MENU once and you will return to the RUN mode.

TEMPERATURE AND HUMIDITY PEN POSITION ADJUSTMENT

NOTE: The blue pen has a longer arm to allow it to move over the red pen.
Therefore one pen will record at real time and the other will lag or lead by 3/16".

In the normal course of operation charts, and eventually pens, will have to be
changed on the CR4-KTH. When this occurs it may be necessary to adjust the
pen position to match the reading of the display. This is most likely to occur
when changing a pen.

How to Adjust the Blue Pen Position on the Chart (Humidity)

1. Press the HOME button until the display reads "Homing the Pens
Please Wait"

2. Press button A to select the pen adjustment menu.

3. Press button B to move blue pen in (toward hub) and button A to move
blue pen out (toward edge of chart).

4. Press MENU to select red pen adjustment menu.

5. Press MENU again if no adjustment of the red pen is required otherwise
go to the “Adjust Red Pen“ instruction (next section).

How to Adjust the Red Pen Position on the chart
(Temperature or Dew Point)

1. Press button A to move the red pen out (toward outer edge of the chart).

2. Press button B to move the red pen in (toward hub).

3. Press MENU to return to the RUN mode.

TEMPERATURE/HUMIDITY SENSOR

• The Temperature / Humidity sensors converts the temperature and relative
humidity to electrical signals that the recorder uses to record and display tem
perature and relative humidity.

• The sensor will measure Temperature from -20°F to +130°F. (-30 to +54°C)

and Relative Humidity from 0 to 100%. The Dew Point is calculated from these
two measurements, and will range from +32°F to +130°F (-30°C to +54°C).
Any readings of Dew Point outside of these limits will be invalid.

• The sensor must not be immersed in any liquid, and must not be subjected to

temperatures outside the -20°F to +120°F range. Each sensor is field replace
able and no calibration is necessary when using a new or different sensor.
Calibration by Supco to NIST traceable standards is available as an option.

BATTERY BACKUP OPERATION

Battery backup allows the CR4-KTH to continue operation in the event of a
power loss. Actual operating time will depend upon the condition of the batter­ies. With fresh alkaline batteries the typical operating time will be 48 hours. Alka­line batteries are essential for this type of application.

When the main power is lost the CR4-KTH will sense this and immediately turn
off the backlight on the LCD display in order to save batteries energy. A “B” will
be displayed in the upper right hand corner of the display to advise the user that

the CR4-KTH is operating on battery power. No other indication will be visible.
The temperature and chart recording will continue until the batteries have been
exhausted or the AC power is restored.

The CR4-KTH will monitor the battery power and when the batteries are almost
exhausted, a "Low Battery" message will appear on the display. The batteries
should be replaced as soon as possible to avoid erroneous readings. This pre­vents possible damage due to battery leakage and also assures that the CR4­KTH will remain in operation in the event of another power failure. The sug­gested battery backup consists of eight AA cells, however, a standard nine volt
battery could be used to provide approximately one hour of backup. The fol­lowing chart shows the life expectancy of various types of batteries.

Batteries

Eight Alkaline AA cells 48 Hours
Eight Rechargeable Nicad AA cells 24 Hours
Standard 9 Volt Alkaline Battery 1 Hour

The life expectancy of the batteries is based on the time when the CR4-KTT
is being operated on batteries only. It is good practice to replace batteries
every year. Do not keep batteries in CR4-KTH when not in use.

RS-232 PORT

The CR4-KTH provides an optional RS-232C port to allow the user to connect
the recorder to a computer or network and allows continuous monitoring of the
data being recorded. An adapter cable is supplied with this option to facilitate
connection to an external computer.

Data is transmitted every time the sensor is sampled and is only interrupted
during an update of the pen position. The data is delimited ASCII text and will
transmit as Temperature, Relative Humidity, and Dew Point. The port parameters
are as follows: 4800 baud, 8 Data Bits, No Parity & 1 Stop Bit.

CR4-KTH SPECIFICATIONS

Operating Ambient Temperature Range +32°F to +120°F (0 to +50°C)
Storage Temperature 0°F to +120°F (-18°C to +50°C)
Primary Power 115VAC, 50/60 Hz. Plug-in Adapter

(220-240VAC, 50 Hz. optional)

Backup Power 8 AA alkaline batteries

(Approx. 48 Hrs.)

Alternative Power 12 Volt vehicle operation with op-

tional adapter
Temperature Accuracy +/- 2°F (+/- 1°C)
Relative Humidity Range 0 - 100%
Relative Humidity Accuracy +/- 2%
Dew Point Range +32°F to +130°F (0°C to +50°C)
Sensor Supco Part #KTH. Combined

Temperature/Humidity with 6' cable

(extended cable length is available)
Chart 6" Circular chart (see following

table)
Chart Rotation Speeds 31 Days, 7 Days, 24 Hours,

12 Hours, 6 Hours, 3 Hours or

1.5 Hours

Chart Rotation Mode User Selectable — Single turn or

continuous
Chart Speed Accuracy +/- 1 %
Display Alphanumeric backlit LCD,

16 Characters, 2 Lines

Temperature Alarm Range -20°F to +120°F (-30°C to +50°C)

Alarm Delay Range User Selectable: No Delay, 10 Min.,

30 Min., 1 Hr. or 2 Hr.
Remote Alarm Connection Normally open contacts 48 VAC/ DC,

0.1 Amp., dry contacts

Mounting Vertical or horizontal,

Free standing or wall mounted
Dimensions 9.25" x 7.25" x 2.75"
Weight 2.5 lb.
Power Consumption 3.5 Watts maximum

CHARTS

TEMPERATURE CHART SPEEDS
RANGES 12 HOURS 24 HOURS 7 DAYS 31 DAYS

-20 to +120°F E20120F12 E20120F24 E20120F7 E20120F3

-20 to +50°F E2050F12 E2050F24 E2050F7 E2050F31
+40 to +110°F E40110F12 E40110F24 E40110F7 E40110F31

-30 to +50°C E3050C12 E3050C24 E3050C7 E3050C31

-30 to +10°C E3010C12 E3010C24 E3010C7 E3010C31
+5 to +45°C E545C12 E545C24 E545C7 E545C31
*NOTE: For 1.5 Hour, 3 Hour and 6 Hour readings, use the 12 Hour charts.

RECORDERS LIMITED WARRANTY

Sealed Unit Parts Co., Inc. hereby warrants that it will repair or replace, at its op­tion, any part of the Universal Series recorder, which proves defective by reason
of improper workmanship or material, free of charge for parts and labor, for a
period of one year from the date of original purchase by the buyer. This warranty
does not apply if, in the sole opinion of Sealed Unit Parts Co., Inc., the Universal
Series has been intentionally damaged due to misuse, neglect, improper pack­ing, shipping, modification of servicing by other than Sealed Unit Parts Co., Inc.,
or personnel authorized by Sealed Unit Parts Co., Inc.. For information on how
to obtain service under this warranty contact the dealer where your Universal Se­ries recorder was purchased, or Sealed Unit Parts Co., Inc. at the address
printed below:

Sealed Unit Parts Co., Inc.
P.O. Box 21
2230 Landmark Place
Allenwood, NJ 08720 USA
Phone: [phone]
FAX: [phone]

LIABILITY DISCLAIMER STATEMENT

Sealed Unit Parts Co., Inc. (hereafter known as Supco) makes no warranty, rep­resentation, or guarantee regarding the suitability of its products for any par­ticular purpose, nor does Supco assume any liability arising out of the applica­tion or use of any product, and specifically disclaims any and all liability, includ­ing without limitation consequential or incidental damages.

Supco products are not designed, intended, or authorized for use as compo­nents in life support systems, or for any other application in which the failure of
the Supco product could create a situation where personnel injury or death or
significant financial loss may occur.

Should any person or persons purchase or use Supco products for any such
unintended or unauthorized application, that person or persons shall indemnify
and hold Supco, and its officers, employees, and affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable at­torney fees arising out of, directly or indirectly, any claim of personal injury,
death or financial loss associated with such unintended or unauthorized use,
even if such claim alleges that Supco was negligent regarding the design or
manufacture of the product in question.