Omega Products CTH100-1D Installation Manual

OPERATIONAL PRECAUTIONS

• When the cover becomes dirty, wipe it with a
clean, soft, damp cloth. If dirt cannot be wiped
off, use a soft damp cloth with a weak solution
of neutral detergent and completely wipe off any
remaining dampness with a soft dry cloth. Never
use a chemical liquid such as alcohol, benzene,
or a thinner and never spray an insecticide or
organic solvent. This may cause a deformity or
discoloration.

• Note that the battery included in the packing
with the recorder may not last a full year after
delivery.

• Never insert the battery incorrectly. Be sure
that the positive and negative poles are not
reversed from the markings on the recorder.
Otherwise, the chart will not turn.

• Kokusai Chart Corporation is not responsible
for any damage to users caused by the use of
this recorder.

PROHIBITED ACTIONS

• Never loosen the white screw. Otherwise, the
temperature and humidity readings cannot be
guaranteed.

• This recorder cannot be used for any
accounting or certification transactions.

SPECIFICATIONS

Type Self-recording, wall mounted

Number of pens One red and one blue

Last for six months.

Recording chart Circular chart 165 mm

in diameter (6.6 inch)

Recording Time One revolution every day,

eight days, or thirty-two days
Power Supply One 1.5V battery
(IEC R6P, ANSI AA) The service life is one year
before replacement is necessary.

Sensors Built in

Temperature: Bimetal

Humidity: Nylon film

Scale ranges Temperature: -10°C to 40°C

or 10°F to 110°F

Relative humidity: 0% to 100% RH

Accuracy Temperature: ±2°C or±4°F

(minimum scale on chart 1°C or 2°F)

Relative humidity:±5% RH between
30% and 90% RH
(minimum scale on chart: 2%)

External dimension Approx. 200mm x 200mm

x 60mm (8x8x2.4inch)
Color of cover Green or ice-white
Weight Approximately 650g (1.5lb)
Standard accessories
30 sheets of circular recording-chart paper
A set of disposable pen cartridges
(one red, one blue)
One battery (IEC R6P, ANSI AA)
One mounting wood screw
Optional consumables
Model No. CTH100-1D (1day recording model)
Model No. CTH100-8D (8day recording model)
Model No. CTH100-32D (32day recording)
30 sheets of circular recording chart paper
A set of disposable pen cartridges
(one red, one blue)
□: C for°C, F and °F

Note: The pen cartridges are designed to last
for six months without replacement, but this
period may vary depending on the

installation en vi ro nm ent

.

WHAT TO DO IF YOU SUSPECT THERE IS A PROBLEM

What you see Reason What to do

Too thin a
pen trace

Discontinuous
pen trace

Color change
In pen trace
(mix of colors)
Scratchy pen
Trace

No pen trace
Whatsoever
Chart no
turning

Inaccurate
Temperature
Or humidity
readings

The pen tip is too sharp ▪Remove the pen from the arm. Rub

The pen is improperly attached
to the arm.
The lifted pen is not in contact with
the chart
If a pen traces over a trace that is
still wet, some of the wet ink is
sucked up into the pen.
The ink has dried up because the
pen was left unused.

The pen is completely used up. ▪Replace the pen with a new one.

The battery is improperly inserted
(the positive and negative poles are
reversed).
The battery is dead. ▪Replace the battery with a new one

Too much friction is preventing the
chart from turning.

The chart drive fails to function. ▪If the above measures are not

Environmental conditions or the
Measurement method results in
Errors
The temperature and humidity
recording pens paths cross, and the
pens touch each other.
There is stress on the sensor due to a
harsh environment beyond the
operating temperature limits resulting
in an error.

the tip against the chart to blunt it and
then use it again.
▪Re-attach the pen, referring to the
manual.
▪Return your recorder to the
distributor or manufacturer.
▪Let the recording continue and the
original color will return after a while
Or, replace the pen with a new one.
▪Use water to wet the pen tip. If this is
not effective in loosing the dried ink,
replace the pen with a new one.

▪Insert the battery correctly.

(IEC R6P, ANSI AA).
▪Turn the pen rest to the standard
position.
▪Check the back of the chart. If it is
wet, wipe off the dampness
or replace the chart with a new one.

effective, return your recorder to the
distributor or manufacturer.
▪Install the recorder in a different
location and compare the recording
with the reference equipment.
▪Consult your local distributor.

LIMITED WARRANTY

OMEGA ENGINEERING INC. warrants this instrument to be free from defects in materials

and workmanship and to give satisfactory service for a period of twelve months after delivery.
If the instrument should malfunction, it must be returned to the seller for evaluation. Upon

examination by OMEGA ENGINEERING INC, if the instrument is found to be defective
it will be repaired or replaced at no charge at OMEGA ENGINEERING INC.'s option.

This warranty is void if the instrument shows evidence of having been tampered with or
shows evidence of being damaged as a result of accident, abuse, improper installation and

application as determined by OMEGA ENGINEERING INC. OMEGA ENGINEERING I NC

makes no further warranty of any kind with regard to this manual, including, but not limited to,
implied warranty of merchantability and fitness for a particular purpose.

Instruction Manual

CTH100

TEMP/RH RECORDER

OPERATION

1. First-time Use

(1) Opening and Closi ng the Cover and Removing

Pen Arm Positioning Material

• Place the recorder on a flat surface. Press the latch
(À) located on one side of the recorder and lift both
sides of the cover (Á).

• When closing the cover, be sure to do it gently,
pressing down on both sides (Á) in a reverse manner
from opening until the latch ( À) clicks shut.

• Remove from between the necks of the pen a rms the
foam rubber pi ece use in tra nsport.

(2) Installing the Battery

• Install the included battery (IEC R6P, ANSI AA) in the
holder with its + pole fa cing left. Installing the ba ttery
starts running the chart.

• See Figure 2. Attach the battery holder cover at the
rear of the recorder.

(3) Attaching the Pens

• Slightly lift the tip of the pen rest to release it from its
latch pin and turn it clockwise until the recording pen
tips are supported on the rest, as show in Figure 3. (The
pen rest keeps the pens from making marks on the
chart.)

• Take the pen cartridges out of the package and
remove the caps. Place the caps on the holders
(projections) as seen in the upper right corner in the
figure.

• Attach the pen cartridges, referring Figure 4, with the
red pen attached to the pen arm marked “°C” or “°F” for
temperature recording and the blue pen to the arm
marked “%” for humidity recording.
À Press the two ends indicated by the arro ws to release
the sides of the spring clip A-B.
Á Attach the pen cartridge so that the guide pins fits
into the guide holes on the pe n arm.
 Press the sides of the clip indicated by the arrows to
engage the clip and secure the pen. Be sure that the
cartridge fits snugly on the arm, as observed from the
side.

• To attach or replace the bl ue pen cartri dge (the bottom
cartridge) when the red-p en arm is directly above, move
the arm for the blue pen to the 0% side. Never move it
to the 100% side.

(4) Starting Measurement (Recording) and

Setting the Time

• To start recording, simply move the pen rest to its
original pos ition.

• The tips of the chart guide on the left-hand side
(from among two guides) projects to a point. Place
the recording chart so that the tip points to the
current time on the time sc ale on the chart.

• The chart’s drive mechanism has a play in rotation
of approximately one hour. (for an 8-day recording
model).

• To adjust the recording time precisely, turn the
chart clock -wise to align the time scale to the current
line. When adjusted, the tip of the red (temperature)
pen nearly points to the current time.

• Replace the chart wit a new one every eight days
from an 8-day recording model (likewise, every day
and every 32 days for the 1-day and 32-day
recording models).

• The chart can be replaced with the recorder
installed.

• To install the recorder, refer to INSTALLATION.

(5) Stopping Measurement (Recording)

• When stoppin g measureme nt or when
measurement for a prescribed period is c ompleted,
place the caps back on the r ecording pens to
prevent the ink from volatilizing.

• Remove the battery.

2. Replacing the Recording Chart

• Slightly lift the tips of the pen rest to release it from
its latch pin and turn it clock-wise until the recording
pen tips are supported on the rest.

• Lift the chart’s magnetized hub cover off and
replace the chart with a new one.

• Verify that t he new chart is correctly positioned
under the three chart guides.

INSTALLATION

1. Mounting Position

Basically, this recorder should be mounted on the
wall.

• To view the recorder from the front, be sure that it
is mounted vertically as show in Figure 6. Titled
mounting will cause a reading error.

• A forward or backward inclination within ±10° is
allowed, as show in Figure 7.

2. Installation Pr o cedure

• Hang the recorder on a wall or column. Use the
attached wood screw is necessary.

• Avoid using the type of self-adhesive hooks
available to many hardware stores. The hook may
come off it is must constantly support the weight of
the recorder.

3. Precautions on Installation Location

• Do not seal the ventilation openings on the sides
and at the bottom of the case since there are
temperature and humidity sensors in it. Be sure
there is nothing within 20 c m around the recorder.

• Do not install the recorder where it will be
exposed to direct sunlight, on a stove, or near the
duct of an air-conditioner.

• Do not installed the recorder in an environment
where dust or poisonous gases are present, where
vibration or mechanical shock may occur, or where
it will be exposed to elements of nature

• When not in us e, the hub cover can
be set on the recorder panel in the

magnetized bot tom right corner, as shown

in Figure 5, to avoid losin g it.