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7. Press and release the Trigger. The Min and Max values
will be reset and the CTG861 will flash SCAN to obtain
new readings.
8. Pushing in the REC button and holding it in for 3
seconds deactivates the REC mode.
Measuring Temperature with K-Type
Thermocouple
1. Squeeze the trigger on the instrument and hold it in or
release it.
2. Press the push button and hold it in.
3. When the LCD displays TC release the push button.
4. Plug the temperature probe into the socket on the side
of the CTG861.
5. Insert the probe tip into the air, liquid or surface to be
measured.
6. Read the temperature on the LCD of the thermometer.
NOTE: You can select the mode of measurement
(°F/°C) or the REC function for K-type temperature
measurement.
Activating Alarm Function
The alarm function only operates in the IR mode. The
CTG861 will compare the measured temperature to
stored Lo and Hi values and will sound an alarm when the
reading is outside those temperatures.
1. Press and release the Trigger.
2. Press and hold the button.
3. Press and hold the E button until "Alarm" shows on the
LCD.
4. Release the buttons.
5. To exit the function, repeat the above steps until
"Alarm" no longer is displayed on the LCD.
Setting High/Low Alarms
1. With the Alarm function activated, press and hold the E
button about 3 seconds. "Alarm" and "High" will flash
in the display.
2. Use the and buttons to adjust the high alarm
value.
3. Press the E button. "Alarm" and "Low" will flash in the
display.
4. Use the and buttons to adjust the low alarm value.
5. Press and hold the E button to return to "Alarm" mode.
6. When measuring temperature if the value is higher or
lower than the alarm settings, "Alarm High" or "Alarm
Low" will display and a continuous beep will be heard.
ZCTG861CE Rev. A
Distance to Target Ratio
The CTG861 has a distance to target ratio of 12 to 1. This
means at a distance of 12 inches the thermometer will
have a target size of 1 inch diameter. At a distance of 12
feet the thermometer will have a target size of 1 foot
diameter.
Emissivity
The emissivity of a material (E) is the relative ability of its
surface to emit energy by radiation. It is the ratio of
energy radiated by a particular material to energy
radiated by a black body at the same temperature. A true
black body would have an E = 1 while any real object
would have E < 1. In general, the duller and blacker a
material is, the closer its emissivity is to 1. The more
reflective a material is, the lower its emissivity.
Adjusting Emissivity
1. Squeeze the trigger on the instrument and hold it in.
2. Push and release the E button and the E will start
flashing on the LCD.
3. Push the button to increase the emissivity or the
button to decrease the emissivity.
4. Push the E button to save the setting.
Setting Emissivity Using K-Type
Contact Probe When Emissivity is not
Known
1. Squeeze the Trigger and release it..
2. Press and hold the push button until TC shows on
the LCD. Release the button.
3. Plug the contact temperature probe into the socket on
the side of the CTG861.
4. Touch the end of the probe
measured and record the temperature when the
reading stabilizes.
5. Remove the temperature probe from the instrument.
6. Push the LOCK button and let the instrument turn off
(Do not push in the trigger).
7. After the unit turns off, squeeze the trigger and point
the instrument at the location the contact probe took
the measurement.
8. Press the E button and push the LOCK or °C/°F until the
reading on the display matches the recorded reading in
step 5 above.
9. Press the SEL button to save the setting.
10. Emissivity is now set for the surface being measured.
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to the surface to be
(01/19)
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