TRH 8706N Manual de usuario
OPERATION MANUAL
Model:
Model:8903/8904/8906
POCKET
PSYCHROMETER
8706
8716
8706N
Thank you very much for purchasing
this psychrometer!
This unique meter is designed as pocket
size, battery operated for Humidity, Dry
Bulb, Dew Point, Wet Bulb, External
Temperature & Temperature Differential
measurement. The sensor is also
specially protected by tunable cap.
The psychrometer is a micro processor-
based design. Amust device for HVAC
engineers use. No need to whirl the
meter or refer to the chart. Easy to get
Wet Bulb/ Dry Bulb and Dew Point
temperature quickly!
Features :
1
INTRODUCTION
Triple LCD digital display.
T1-T2 & T2-DP function.(Model:8716)
Data Hold to capture readings.
Pocket size, easy to fit in pocket.
Low battery indication.
Fast response .
Accurate reading .
Maximum record function .
Minimum record function.
Dew Point calculated in seconds.
(Model:8706, 8716)
Wet Bulb calculated in seconds.
(Model:8706, 8716)
Microprocessor circuitry for reliability.
Auto power off time frame selectable.
Disable power off.
Tunable cap to protect sensor.
External Temp. probe.
2
The meter x 1
Battery x 2 (AAAsize )
Operation manual
White plain box / gift box
Optional accessory :
External temperature probe :
P/N: VZ87P6AZ
Calibration salt bottles :
(33% and 75%)
P/N: VZ0033AZ1 , VZ0075AZ1
Hard carry case :
P/N: VM68706B
MATERIAL SUPPLIED
WARNING
IMPORTANT:
CLOSE OPEN
External probe port
BE SURE TO OPEN THE SENSOR
PROTECTION CAP BEFORE STARTING
THE MEASUREMENT IN ORDER TO
GET ACCURATE VALUE FOR ALL
MODELS.
This package contains:
HOLD
MX/MNMX/MN
oo
C/ F
MODE
RESETRESET
5) RESET Key
- Reset Min/Max memory
6) MN/MX Key
- Display minimum value of memory
from power on to the moment.
- Display maximum value of memory
from power on to the moment.
1) Key
- Power on/off
oo
2) C/ F Key
-Switch between
o
display of C
o
and F
3) MODE key
- N/A
4) HOLD Key
- Hold display
- + HOLD = Non-Sleep mode (The
default setting is auto-sleep in 5 min.)
3
CONTROLS AND INDICATORS
Db
Ex.
OC
OF
LCD DISPLAY
RH%
Dry Bulb
External
Temperature
Model:8706N
Db
DP
Wb
Ex.
OC
OF
LCD DISPLAY
RH%
Dry Bulb
Dew Point
Wet Bulb
External
Temperature
Model:8706
HOLD
MX/MNMX/MN
oo
C/ F
MODE
RESETRESET
1) Key
- Power on/off
5) RESET Key
- Reset Min/Max memory
- Wb and Ex mode switch (Press to
display only while external probe is
plugged.)
6) MN/MX Key
- Display minimum value of memory
from power on to the moment.
- Display maximum value of memory
from power on to the moment.
oo
2) C/ F Key
-Switch between
o
display of C
o
and F
3) MODE key
-Switch between
display of Db &
DP
(Db=Air Temp.)
4) HOLD Key
- Hold display
- + HOLD = Non-Sleep mode (The
default setting is auto-sleep in 5 min.)
4
5
LCD DISPLAY
1) ON/OFF key
-Power on/off
oo
3) C/ F key
-Switch between
oo
C and F
Model:8716
2) key
-Switch between
,DP and T1.
( T=T1-T2,
T1=Air Temp.
T2=ExternalTemp.)
T/DP
T1
T
5) key
-Switch between , WB and T2.
( =T2-DP,T2=ExternalTemp.)
/WB
T2
6) key
- Reset Min/Max memory.
- Display minimum value of memory
from power on to the moment.
- Display maximum value of memory
from power on to the moment.
Air Temp.
RH%
Dew
Point
T1-T2
Wet Bulb
External
Temperature
T2-DP
4) HOLD Key
- Hold display
- ON/OFF + HOLD = Non-Sleep mode.
Non-sleep time is selectable from 2, 5,
10, 20, 40 to 60 min. (The default
setting is auto-sleep in 10 min.)
HOLD
T/DP
T2
T1
/WB
ON/OFFON/OFF
oo
C/ F
RESETRESET
MX/MNMX/MN
RESETRESET
MX/MNMX/MN
Fig. A
6
Unit will turn itself off after 5 minutes
(8706N, 8706) or 10 minutes (8716).
To override Auto Power Off function,
press + HOLD (8706N, 8706) or
ON/OFF + HOLD(8716) while the meter
is off. When " n" appears (See Fig.A),
release HOLD button. Meter is now in
Non-Sleep Mode.
(1) Turning on the protective sensor cap
in counterclockwise direction.
(2) Turn meter on by pressing (8706N,
8706) or ON/OFF(8716) button.
(See Fig.B)
(3) Press C/F key more than 1 sec. to
convert reading to desired unit.
Both temperature and relative
humidity measurement will display
simultaneously.(See Fig.C)
Fig. B
AUTO POWER OFF
(SLEEP FUNCTION)
MODE OPTIONS
Db
DP
Wb
Ex.
OC
OF
8706
Fig. C
8716
For 8716, the auto power off time frame
could be selectable from 2, 5, 10, 20,
40 to 60 minutes.
Press "HOLD" button until (HLD)
appears in display.
The current reading is now held and will
not change until Hold function cancelled.
(See Fig.D).
Press "HOLD" button again to cancel
Hold function. Hold function can be
used on humidity, dew-point, dry bulb/T1
, Ext. Temp./T2, wet bulb and
temp. Difference.
DATA HOLD FUNCTION
7
Wb
OC
Db
8706
Fig. D
PARTIAL HOLD FUNCTION FOR 8716
While in normal mode, press "HOLD"
+ ,only the T1, RH will be held.
Press "HOLD"again to release.
While in normal mode, press "HOLD"
+ ,only the T2 will be held.
Press "HOLD"again to release.
T2
/WB
T/DP
T1
Press MODE button until "DP" appears
on display. Select to display dew point
or dry bulb (air temp.) in any mode while
the unit is on. See Fig. E
DEW POINT FUNCTION
8706:
8706N isn't equippedwith this function.
WET BULB FUNCTION
Turn the meter on by pressing button.
User will see "Wb" temperature
indicated on the display. See Fig.E
8706
8716
/WB
T2
Press until Wbappear on the
LCD.User will see"Wb" temperature
indicated on thedisplay. See Fig.E1
8706N isn't equippedwith this function.
Fig. E Fig. E1
Press button until "DP" appears
on display. Select to display dew point,
T1( air temp.) or delta T(T1-T2) in any
mode while the meter is on. See Fig. E1.
8716:
T/DP
T1
Wb
OC
DP
Ex. TEMPERATURE FUNCTION
Plug the external probe into the meter.
Unit will now display external probe
temperature. See Fig.F1
8706N
Plug the external probe into the meter.
Short press RESET button until "Ex"
appears on display. Unit will now display
external probe temperature. See Fig.F2
8706
8
9
Fig. F1
Db
Ex.
OF
OC
DP
Ex.
Fig. F2 Fig. F3
8716
Plug the external probe into the meter.
Press button until "T2" appears
on display. Unit will now display external
probe temperature. See Fig.F3
T2
/WB
Remark: For 8706 and 8716, If the probe
isn't plugged in meter, "Ex"or "T2" won't
appear on display even pressing the
RESET or key.
T2
/WB
MIN./MAX. FUNCTION
(1) Press and hold MN/MX (8706N, 8706)
or (8716) button until (MIN)
appears on display.(See Fig.G)
Display is now showing minimum
humidity and temperature readings
in memory.
(2) Press and hold MN/MX(8706N,8706)
or (8716) button again until (MAX)
appears on display. (See Fig.H)
Display is now showing maximum
humidity and temperature readings in
memory.
RESETRESET
MX/MNMX/MN
RESETRESET
MX/MNMX/MN
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