CHY 801C Operating Instructions

OPERATING INSTRUCTIONS
MODEL 801C
MULTI-TYPE THERMOMETER
INTRODUCTION
This instrument is a 3½ digit, compact-sized portable
digital thermometer designed to use external K/J/T/E type
thermocouples as temperature sensor. Temperature indica-
tion follows Reference Temperature/Voltage Tables
(N.I.S.T. Monograph 175 Revised to ITS-90) for K/J/T/E
type thermocouples.
SAFETY INFORMATION
It is recommended that you read the safety and opera-
tion instructions before using the thermometer.
WARNING
To avoid electrical shock, do not use this instrument
when working voltages at the measurement surface
over 24V AC or DC.
WARNING
To avoid damage or burns, do not make temperature
measurement in microwave ovens.
CAUTION
Repeated sharp flexing can break the thermocouple
leads. To prolong lead life, avoid sharp bends in the
leads, especially near the connector.
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:
Thermocouple Range
K-TYPE(0.1°C) -200°C to 1372°C, -328°F to 1999°F
J-TYPE(0.1°C) -210°C to 1050°C, -346°F to 1922°F
T-TYPE(0.1°C) -200°C to 400°C, -328°F to 752°F
E-TYPE(0.1°C) -220°C to 790°C, -364°F to 1454°F
Auto range: 0.1°C/1°C, 0.1°F/1°F
Accuracy: Accuracy is specified for operating tempera-
tures over the range of 18°C to 28°C (64°F to 82°F), for
1 year, not including thermocouple error.
±(0.1%rdg+1°C) on -60°C to 1372°C
±(0.1%rdg+2°C) on -60°C to -220°C
±(0.1%rdg+2°F) on -76°F to 1999°F
±(0.1%rdg+4°F) on -76°F to -364°F
ENVIRONMENTAL
Ambient Operating Ranges:
0°C to 50°C (32°F to 122°F) <80% R.H.
Storage Temperature:
-20°C to 60°C (-4°F to 140°F) <70% R.H.
GENERAL
Display: 3½ digit liquid crystal display (LCD) with a
maximum reading of 1999.
Polarity: Automatic, positive implied, negative polarity
indication.
Overrange: "OL" or "-OL" is displayed.
Zero: Automatic.
Reading Rate: 1 time per second.
Low battery indication: The " " is displayed when the
battery voltage drops below the operating level.
Measurement rate: 1 time/second.
Accuracy: Stated accuracy at 23°C±5°C, <75% R.H.
Dimensions: 160mm(H) x 83mm(W) x 38mm(D).
Weight: approx. 265g including batteries.
Input Connector: Accepts standard miniature thermocou-
ple connectors (flat blades spaced 7.9mm, center to cen-
ter).
Battery Life: 200 hours typical with carbon zinc batteries.
Auto power off: The meter will be inactive for more than
30 minutes, press power key to resume operation.
Temperature Coefficient: 0.1 times the applicable accu-
racy specification per °C from 0°C to 18°C and 28°C to
50°C (32°F to 64°F and 82°F to 122°F).
Input Protection: 24V dc or 24V ac rms maximum input
voltage on any combination of input pins.
OPERATING INSTRUCTIONS
1. " " Power Button
The " " key turns the thermometer on or off. In the
MAX/MIN record mode can not power off, must exit
MAX/MIN record mode then power off. In power off
status, pushing this key more than 4 seconds to disable
auto power-off and turn on the power.
2. "HOLD" Button
Press the "HOLD" key to enter the Data Hold mode,
the "HOLD" annunciator is displayed. When HOLD
mode is selected, the thermometer held the present read-
ings and stops all further measurements.
Pressing the "HOLD" key again to cancel HOLD
mode, make thermometer to resume taking measure-
ments. In the MAX/MIN recording mode, press
"HOLD" key to stop the recording. Press "HOLD" key
again to resume recording. (Previously recorded read-
ings are not erased.)
3. " /°C/°F" Button
Press " " button to turn on or off backlight. The
backlight will switch-off automatically after 30 seconds.
Readings is displayed in either degrees Celsius (°C)
or degrees Fahrenheit (°F). When the thermometer is
turned on, it is set to the temperature scale that was in
use then the thermometer was last turned off. To change
the temperature scale, pressing the "°C/°F" button more
than 2 seconds to toggle the °C/°F.
4. "REL" Button
Press "REL" key to enter the Relative mode, zero the
display, and store the displayed Reading as a reference
value and annunciator REL is displayed. Pressing
"REL" key more than 2 seconds to exit the relative
mode. The relative value can also be entered by the user.
(See "SET mode" later in this manual). When the de-
sired Relative value has been entered, press "SET" key
use set Relative value as a reference value. Press "REL"
key again to exit the relative mode.
In the Relative mode, the value (can not be ±2,000
counts) shown on the LCD is always the difference be-
tween the stored reference and the present reading.
5. "Type" Button: K/J/T/E Input Thermocouple Type
The "TYPE" key switch the input circulating selects
the K/J/T/E type thermocouple as input. When the ther-
mometer is turned on, it is set to the type selected that
was in use when the thermometer was last turned off.
6. "MAX/MIN" Button: Record mode
Press "MAX/MIN" key to enter the MAX/MIN Re-
cording mode, (Displays the Maximum reading, Mini-
mum reading, "MAX-MIN" reading and Average read-
ing stored in record mode). In this mode the automatic
power-off feature is disabled and " " key and all func-
tion key are disabled. The beeper emits a tone when a
new maximum or minimum value is recorded.
Push "MAX/MIN" key to cycle through the MAX,
MIN, MAX-MIN and AVG readings. If overload is re-
corded, the averaging function is stopped and average
value display "OL" or "-OL". In this mode, press
"HOLD" key to stop the recording of readings, all val-
ues are frozen, press again to restart recording. To pre-
vent accidental loss of MAX, MIN, "MAX-MIN" and
AVG data, in this mode can only be cancelled by press-
ing and hold down the MAX/MIN key for 2 seconds to
exit and erased recorded readings.
7. "Hi/Lo" Button: LIMITS mode
Press "Hi/Lo" key to enter the Hi/Lo LIMITS com-
parative mode, "LIMIT" is displayed. When the input
temperature value more than Hi value, the beeper emits
a continuity pulse tone and "Hi" is displayed, and when
input temperature value less than Lo value. The beeper
emits a discontinuous pulse tone and "Lo" is displayed.
Press "Hi/Lo" LIMIT key again to exit the Hi/Lo LIMIT
mode.
8. "T1 ▲" Button: Input channel selection and in
creases the setting value.
The "T1" key switch the measurement input to T1.
"T1" annunciator is displayed. LCD display will display
the temperature which is from T1 input slot. The "▲"
key increases the setting value. (See "SET mode" later
in this manual.)
9. "TC OFFSET" Button
Set the Cool Junction Compensation. User can ad-
justment the measurement readings in ±5.0 counts. This
value is used to compensate the thermocouple sensor. If
this value has been entered, the readings displayed on
LCD would be auto added or subtracted this setting
value. (See "SET mode" later in this manual.)
10. "T1-T2 ◄" Button: Input channel selection
and change setting digit.
The "T1-T2" key switch the temperature measure-
ment input to T1-T2. "T1-T2" annunciator is displayed.
LCD display will display the temperature which are
from T1 and T2 input slot. T1 minus T2 will show on
LCD display. If any of the slot is empty, the LCD dis-
play will show "OL" or "–OL". The "◄" key changes