Supco CRTH2 User Manual

CRTH2

Temperature, Humidity &

Dew Point Recorder Manual

SEALED UNIT PARTS CO., INC.

PO Box 21, 2230 Landmark Place

Allenwood, NJ 08720 USA

www.supco.com

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 or 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

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 or medical systems, or for any other application in which the failure of
the SUPCO product could create a situation where personal injury, 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, affiliates and distributors harmless against
all claims, costs, damages, 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.

cRtH2 RecoRdeR

WitH tempeRatuRe/Humidity deW point sensoR

The CRTH2 is a precision, multifunction chart recorder. The recorder was designed with
the user in mind. No special knowledge is required to operate the CRTH2. 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 CRTH2 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 CRTH2 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.

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 CRTH2 are accessed through five push buttons located on the front
panel. Selectable functions are retained in a memory to avoid re-entering settings in the
event of a power failure.

Quick staRt

1. Connect power supply to CRTH2 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
reading. 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.)

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menu oR Run?

The CRTH2 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 star ting 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.

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cHaRt speed and Range

The CRTH2 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 short­term 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 the 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 present
the setting for chart speed.

2. To select a longer chart speed, press the A button, for shor ter char t 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

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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 CRTH2 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 CRTH2 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. This is most likely to occur when changing a pen.

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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 CRTH2 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 reach the delay sections of the
MENU.)

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

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tempeRatuRe and Humidity Limits

The Temperature and Humidity Upper and Lower Limits allow the user to customize the
alarm settings of the CRTH2 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 (Beep) 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 continuously 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

CRTH2. When this occurs it may be necessary to adjust the pen position to match the reading
of the display.

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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 sensor converts the temperature and relative
humidity to electrical signals that the recorder uses to record and display
temperature 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 replaceable
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 CRTH2 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 CRTH2 will sense this and immediately turn off the
backlight on the LCD display in order to save the batteries’ energy. A “B” will be displayed
in the upper right hand corner of the display to advise the user that the CRTH2 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.

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The CRTH2 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 CRTH2 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

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cRtH2 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 optional
adapter
Temperature Accuracy +/- 2°F (+/- 1°C)
Relative Humidity Range 0 - 90% Non-condensing
Relative Humidity Accuracy +/- 5% Full Scale
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 or1.5 Hours
Chart Rotation Mode User Selectable — Single turn or continuous
Chart Speed Accuracy +/- 5 %
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.

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SEALED UNIT PARTS CO., INC.

PO Box 21, 2230 Landmark Place

Allenwood, NJ 08720 USA

www.supco.com

21035

11142014

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