MRC HD-3008 User manual
Dew Point + Type K Thermometer
HYGROMETER
Model : HD-3008
PLEASE READ THIS MANUAL CAREFULLY BEFORE OPERATION
MRC.8.20
TABLE OF CONTENTS
1. FEATURES............................................................. 1
2. SPECIFICATIONS................................................... 2
3. FRONT PANEL DESCRIPTION.................................
.
5
3-1 Display...................................................................5
3-2 Power Button.........................................................
.
5
3-3 REC. Button............................................................5
3-4 Hold Button............................................................ 5
3-5 Button..................................................................... 5
3-6 Function Button ..................................................... 5
3-7 Battery Compartment/Cover.................................... 5
3-8 Temp. Probe input Socket .......................................
.
5
3-9 Humidity Probe input Socket ....................................5
3-10 RS-232 Output Terminal......................................... 5
3-11 Stand.................................................................... 5
4. MEASURING PROCEDURE.......................................6
4-1 Hygrometer measurement..................................
.
6
4-2 Dew point measurement.....................................6
4-3 Type K thermometer measurement.....................
.
6
4-4 Data Hold..........................................................
.
7
4-5 Data Record (Max, Min reading).......................... 7
5. OFFSET TEMPERATURE ADJUSTMENT for
Type K THERMOMETER........................................... 8
6. AUTO POWER OFF DISABLE.....................................10
7. RS232 PC SERIAL INTERFACE..................................
.
10
8. BATTERY REPLACEMENT..........................................11
9. OPTIONAL PROBES & ACCESSORIES.........................12
1. FEATURES
* Hygrometer + Dew point + Type K Thermometer are
combined into one meter, intelligent.
* Dew point measurement.
* Thin-film capacitance sensor for humidity
measurement, high precision.
* Type K thermometer build in temperature linearity
& precision cold junction compensation circuit, high
accuracy.
* Microprocessor circuit assures maximum possible
accuracy, provides special functions and features.
* Large LCD with two display, easy readout.
* Heavy duty & compact housing case, designed
for easy carry out & operation.
* Records Maximum and Minimum readings with Recall.
* Auto shut off saves battery life.
* Data hold function for freezing the desired value
on display.
* RS 232 PC serial interface.
* Show the humidity & temperature values on the
LCD display at same time.
* Conversion is selected by push button on front
panel easily.
* Built-in low battery indicator.
* Humidity measurement uses a high precision
thin-film capacitance sensor for fast response,
not depending on air flow passing through the probe.
* Humidity probe built-in thermistor sensor for
temperature measurement, fast response time.
* Wide humidity & temp. measuring range.
* Separate humidity & temp. probe, easy operation. &
remote measurement.
1
2. SPECIFICATIONS
2-1 General Specifications
Circuit Custom one-chip of microprocessor LSI
circuit.
Display 51 mm x 32 mm, 15 mm ( 0.6" ) digit size.
dual function LCD display,
Measurement
Hygrometer :
R.H. ( Relative Humidity )
Temperature - 蚓, 蚌.
Dew point :
Type K thermometer :
Sensor
Hygrometer ( Dew Point ) meter :
* Humidity : High precision thin-film
capacitance sensor.
* Temperature : Thermistor.
Type K thermometer :
Thermocouple probe.
Data Hold Freeze the display reading by push button.
Memory Recall Maximum & Minimum.
Sampling Time Approx. 0.8 second.
Power off Auto shut off saves battery life or manual off
by push button.
Data Output RS 232 PC serial interface.
Operating 0 to 50 .
Temperature
Operating Main instrument : Less than 80% R.H.
Humidity Probe : Less than 95% R.H.
Power Supply 006P DC 9V battery
( Alkaline or Heavy duty type ).
2
Power Current Approx. DC 7 mA.
Weight 250 g/0.55 LB.
Dimension
Main instrument:
195 x 68 x 30 mm ( 7.6 x 2.6 x 1.2 inch )
Humidity Sensor Probe:
Round 26 mm Dia. x 160 mm.
Accessories Instruction manual......................1 PC.
Included Humidity probe...........................1 PC.
Carryin
g
case.............................
.
1 PC.
Optional
33% RH HUMIDITY CALIBRATOR
Accessories Model: RHA-33
75% RH HUMIDITY CALIBRATOR
ref. page 11
Model : RHA-75
Type k thermocouple Probe :
Model : TP-01, TP-02A, TP-03,
TP-04.
2-2 Electrical Specifications ( 23 5 蚓)
Humidity/ Temperature
Ran
g
e 10 % to 95 % R.H.
Humidity Resolution 0.1 % R.H.
Accuracy
70% RH :
( 3 % readin
g
+ 1 % R.H.)
< 70 % R.H. :
3% R.H.
Ran
g
e0
蚓
to 50
蚓
, 32
蚌
to 122
蚌
.
Temperature Resolution 0.1 de
g
ree
Accuracy
蚓
- 0.8
蚓
.
蚌
- 1.5
蚌
.
3
Dew Point
蚓
Ran
g
e -25.3
蚓
to 48.9
蚓
Resolution 0.1
蚓
蚌
Ran
g
e -13.5
蚌
to 120.1
蚌
.
Resolution 0.1
蚌
.
Remark :
* Dew Point display value is calculated from the
Humidity/Temp. measurement automatically.
*The Dew Point accuracy is sum accuracy value of Humidity
& Temperature measurement..
Type K Thermomete
r
蚓
Ran
g
e -100.0 to 1300.0
蚓
Resolution 0.1
蚓
Accuracy
-
5
0
.0 to 130
0
.0
蚓
:
( 0.2 % + 0.5
蚓
)
-
5
0
.1 to
-
10
0
.0
蚓
:
( 0.2 % + 1
蚓
)
蚌
Ran
g
e -148.0 to 2372.0
蚌
Resolution 0.1
蚌
.
Accuracy
-
5
8
.0 to 237
2
.0
蚌
:
( 0.2 % + 1
蚌
)
-
5
8
.1 to
-
14
8
.0
蚌
:
( 0.2 % + 1.8
蚌
)
4
3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display 3-8 Temp. Probe input Socket
3-2 Power Button 3-9 Humidity Probe input Socket
3-3 REC. Button 3-10 RS-232 Output Terminal
3-4 Hold Button 3-11 Stand
3-5 蚓,蚌Button 3-12 Sensor Head ( R.H., Temp. )
3-6 Function Button 3-13 Probe Handle
3-7 Battery Compartment 3-14 Probe Plug
/C
over 5
4. MEASURING PROCEDURE
4-1 Hygrometer measurement
( Humidity & temperature measurement )
1)Plug the Humidity probe into the " Humidity Probe input
Socket " ( 3-9, Fig. 1 ).
2)Power on the meter by pressing the Power Button ( 3-2,
Fig. 1 ), the LCD shows the unit " % RH " & " 蚓" at the
same time and measured value will show on the display
( upper display is Humidity value, the lower display is the
temperature value ) .
3)Press the " 蚓,蚌Button " ( 3-5, Fig. 1 ) to select the
temperature unit. You can see the current unit at the
bottom-right position of the LCD display.
4-2 Dew point measurement
The procedures of " Dew point measurement " are same as the
" Hygrometer measurement ", except select the " Dew point "
function by pressing the " Function Button "(3-6, Fig. 1), the
LCD will show the unit " DEW " & " 蚓( or 蚌).
4-3 Type K thermometer measurement
1)Take out the humidity probe away from the " Humidity
Probe input Socket " ( 3-9, Fig. 1 ).
*
If not take out the humidity probe, the type K
measurement will be still available.
2)Plug the optional type K temperature probe into the
" Temp. Probe input Socket " ( 3-8, Fig. 1 ). Press the
" Function Button " ( 3-6, Fig. 1 ) once a while until the
display showing the unit of " 蚓" ( or 蚌) only.
6
4-4 Data Hold
During the measurement, press the " Hold Button " ( 3-4,
Fig. 1 ) will hold the measured value & the LCD will
indicate a " HOLD " symbol on the display.
* Press the " Hold Button " again to release the data hold
function.
4-5 Data Record ( Max., Min. reading )
* The data record function records the maximum and
minimum readings. Press the " REC. Button " ( 3-3, Fig.
1 ) to start the Data Record function and there will be a
" REC " symbol on the display.
* With the " REC " symbol on the display :
a)Press the " REC. Button " ( 3-3, Fig. 1 ) once, the
" REC Max " symbol along with the maximum value
will appear on the display.
If intend to delete the maximum value, just press
the " Hold Button " ( 3-4, Fig. 1 ) for a while, then
the display will show the " REC " symbol only &
execute the memory function continuously.
b)Press the " REC. Button " ( 3-3, Fig. 1 ) again, the
" REC Min " symbol along with the minimum value
will appear on the display.
If intend to delete the minimum value, just press
the " Hold Button " ( 3-4, Fig. 1 ) for a while, then
the display will show the " REC " symbol only &
execute the memory function continuously.
c) To exit the memory record function, just press the
" REC " button for 2 seconds at least. The display will
revert to the current reading.
7
5. OFFSET TEMPERATURE ADJUSTMEN
T
Type K THERMOMETER
The instrument is fully calibrated to assure the high quality
measuring performance. Usually it is not necessary to execute
the Offset Temperature Adjustment procedures, however the
measured result could be influenced by using different type of
temperature probes. Under such condition, customer can
easily compensate the temperature value by push button on the
front panel. However, in general conditions, customers are
always not recommended to execute the Offset Temperature
Adjustment Procedures without qualified calibration
equipment.
Offset Temp. Adjustment Procedure
1)Power on the instrument.
2)Connect with a reliable temperature calibrator.
3)Adjust the calibrator and make it 0.0 output.
4)Press the " Hold Button " ( 3-4, Fig. 1 ) and " REC.
Button " ( 3-3, Fig. 1 ) at the same time for around 1
seconds, the upper display and lower display will show the
same value like
0.20.2
8
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