FLUS ET-951W User manual

User's Manual
Professional Humidity & Temperature Meter
Please read this user's manual thoroughly before using this unit
and keep it properly for your future reference.

Contents
1. Safety............................................................... 1
2. Introduction......................................................2
3. Features............................................................ 2
4. Specifications................................................... 3
5. Meter Description............................................ 4
6. LCD Display Description.................................5
7. Operation Instruction....................................... 6
8. Notes.............................................................. 10
9. Accessories.....................................................10

1
1. Safety
Read the following safety information carefully before attempting
to operate or service the meter.
Use the meter only as specified in this manual; otherwise, the
protection provided by the meter may be impaired.
◆Environment conditions:
RH≤90％（Non-Condensation）
Operating Temperature: -30℃ ～ 60℃
◆Maintenance
Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
Wipe the unit with a dry soft cloth. Do not use abrasives or
solvents on this instrument.
◆Safety Symbol
Comply with EMC

2
2. Introduction
The Humidity & Temperature Meter is designed with a high
accuracy temperature & humidity sensor, providing high accuracy,
fast response and stable readings. It is widely used for monitoring
and collecting data of environment temperature and humidity.
This meter is widely used for measurement of temperature and
humidity of room, metro, library, commercial center,
communication center room, etc.
3. Features
◆Temperature units: ℃/℉
◆MAX record
◆MIN record
◆Data hold
◆Dew Point Temperature
◆Backlight
◆Resolution 0.1%RH, 0.1℃
◆Calibration function

3
4. Specifications
Humidity
Measuring
range
Accuracy
0～100%RH
40%～60%RH: ±2.0%
20%～40%RH;60%～80%RH: ±3.0%
0～20%RH;80%～100%RH: ±4.0%
Temp.
-35℃～100℃
-31℉～212℉
-35℃～-10℃, 70℃～100℃: ±1.0℃
-10℃～70℃: ±0.5℃
-31℉～+14℉,158℉～212℉: ±1.8℉
14℉～158℉: ±0.9℉
Dew Point
Temp.
-35～100℃
-31℉～212℉
25℃,40%～100%RH : ±1.0℃(±1.8℉)
Wet bulb
Temp.
0 ℃ ～ 80 ℃
32℉～176℉
25℃,40%～100%RH； ±1.0 ℃(±1.8
℉)
Sampling
rate
2 times per second
Resolution
0.1%RH, 0.1℃
Working
Temp.
-30℃to 60℃
Power
Resource
9V battery
Dimension
(L*W*H)
185*66*33(mm)
Weight
237g

4
5. Meter Description
⑴Probe connector
⑵LCD Display
⑶Backlight ON/OFF key
⑷ ℃/℉temperature units key
⑸MAX/UP key
⑹UNITS
⑺MIN/DOWN key
⑻Power ON/OFF key
⑼Data hold key
⑽SET key
⑾Temperature & Humidity sensor
⑿Tripod nut
⒀Battery compartment

5
6. LCD Display Description
⑴Humidity unit icon
⑵Humidity reading
⑶Dew point temperature units icon
⑷Wet bulb temperature units icon
⑸Auto power off icon
⑹Battery icon
⑺MAX/MIN icon
⑻Data hold icon
⑼Temperature reading
⑽Temperature unit icon

6
7. Operation Instruction
(1) Open battery cover and install a 9-volt battery in the battery
compartment.
(2) Power ON: Turn the meter on by pressing " " button for 1
second until the LCD is lighted, then loose the button.
(3) Power OFF: Turn the meter off by pressing and holding
" " button for approx. 3 seconds until the LCD is switched off,
then loose the button.
(4) MAX record: press " " button once, MAX icon will
appear on the LCD, which indicates the current maximum reading,
press this button again to exit MAX record display.
(5) MIN record: press " " button once, MIN icon will appear
on the LCD, which indicates the current maximum reading, press
this button again to exit MIN record display.
(6) In the measuring mode, press " " button to convert the
temperature units ℃/℉.

7
(7) Auto power off icon, the meter will automatically turn off
after approx. 15 minutes of inactivity.
(8) UNITS :press“ ”button once，“ ”icon will appear
on the LCD, the meter enters into dew temperature
measuring mode, press the button again,“ ”icon will
appear on the LCD, the meter enters into wet bulb
temperature mode, press the button for the third time, meter
goes back to normal temperature measuring.
(9) Hold: press " " button once, "HOLD" icon will appear on
the LCD, which indicates the data is freezed. To release the held
reading, press the button again.
(10) Humidity Calibration
In the Power OFF mode, keep pressing " " button then power
the meter on, after the LCD displays, release all the buttons, the
LCD will display as follows:

8
The upper reading is the real humidity value, the middle reading is
the calibration value and the lower one is the MAX icon, which
indicates the calibration value is above 75%RH. Press “▲” or
“▼” button to increase or decrease the value, after finished
calibration, press "HOLD" button to exit the Humidity Calibration
Mode and the calibrated value will be kept automatically.
If not exit the mode, press SET button once, the MIN icon will
appear on the lower part of LCD, which indicates the calibration
value is below 35%RH, Press “▲” or “▼” button to increase or
decrease the value, after finished calibration, press "HOLD"
button to exit it and the calibrated value will be kept automatically,
LCD display will as below:

9
(11) Backlight ON/OFF；In the Power ON mode, press " "
button once, the backlight will be on, press this button again to
turn off it.

10
8. Notes
(1) This meter has already been calibrated before delivery. Do not
revise the calibration parameters without professional personnel
and device. The recommended calibration period is one year.
(2) Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
(3) Wipe the unit with a dry soft cloth. Do not use abrasives or
solvents on this instrument.
(4) Remove the battery when the meter is to be stored for long
periods of time to avoid battery leakage.
(5) Replace new batteries when the low battery icon " "
appears.
9. Accessories
○
1
User's manual
○
2
9V battery
○
3
Tripod (Optional)