Tenmars TM-291 User manual

Electrostatic Meter
TM-291
User’s Manual
HB2TM2910000

Contents
1 Introduction........................................................ 1
2 Accessories ....................................................... 1
3 Safety Precaution .............................................. 1
4 Instrument Description....................................... 2
5 Operation........................................................... 3
5-1 Disable Auto Power Off Mode.................... 4
5-2 Zeroing....................................................... 4
5-3 Manual record mode.................................. 4
5-4 Display logs mode ..................................... 5
5-5 Backlight Mode.......................................... 5
5-6 Setting mode.............................................. 5
6 Specifications..................................................... 7
7 Maintenance or Repair ...................................... 8
8 Battery Replacement ......................................... 8
9 Product Disposal................................................ 8

1
1Introduction
This contactless precise electrostatic field meter can
immediately sensor the static voltage on a charged body
without contact. The measuring range is 0.010kV ~
20.000kV with the sensing distance 1 inch (2.54cm).
The meter provides alarm function for prompt.
2 Accessories
1
1
1
1
Meter
User’s Manual
9V alkaline battery
Carrying case
3 Safety Precaution
Caution! Please refer to this manual.
Improper use may damage the meter
and its components.
Complies with European Directive.
Do not operate in environments with flammable gas or
humid environments.
Operating altitude: up to 2000M.
Operating environment: Indoor use; Pollution degree 2.
Clean with soft cloth when dirty, such as glasses cloth.
Do not clean with chemicals and other solvents.
EMC: EN61326-1:CISPR 11:Group 1, Class B
Class B – Equipment for use in all establishments other
than
domestic.
Group 1 – RF energy generated is needed for internal
functioning.

2
4 Instrument Description
1. Sensor
2. LCD display
3. +peak value (max.
value)
4. -peak value (min.
value)
5. Zero setting button
6. Power button
7. Function Setting button
8. Record readings / up
button
9. Display logs / down
button
10.Data hold
11.Backlight button
12.Grounding socket
13.Tripod nut
14.battery cover
15.Grounding wire
16.Crocodile clip
17.Protection cap

3
5 Operation
Before use, the meter must be grounded. Please
choose one of the following two methods to ground the
meter:
1. The first method is connecting the meter's ground
socket with one end of the grounding wire of
accessory and connecting to the earth end of the
building with another end of the grounding wire, or
connecting to the electrical socket for earthing, or
clamping the earth end with a crocodile clip.
2. The second method is the operator wears the
anti-static wrist strap and connecting to the earth
end of the building with another end of the anti-static
wrist strap. Note that the anti-static wrist strap is not
an accessory and shall be prepared by yourself.
During the measuring for static voltage, please
fasten ceramic spacers on the fix-threads besides the
sensor. Keep the sensor from the area under test for 1
inch (2.54 cm).
Click the Power button.
Make sure the meter is grounded before operating.
Aim the sensor point to the area under test, keeping
your fingers away from the area under test as possible.
Read the value (static voltage value) on the LCD.
As completing a measurement, click the
button to lock the reading permanently to hold the
Warning
The meter must be securely
grounded during measuring, and the
hold
ing position not close to the
sensor
so to avoid the risk of electric
shock.

4
reading on the LCD for a long time; click the
button again to unlock to unlock the reading.
Click the button to continuously update the
maximum measuring value on the LCD to keep the
+peak value (max. value), click the button again
to cancel.
Click the button to continuously update the
minimum measuring value on the LCD to keep the -peak
value (min. value), click the button again to
cancel.
5-1 Disable Auto Power Off Mode
The meter will automatically power off after
powering on for about 15 minutes. The LCD
displays symbol at the mode. If to
disable the function, press and hold the
button for more than 2 seconds.
5-2 Zeroing
Prior to measuring the static voltage, click the
button for more than 2 seconds to clear the reading if an
old reading survived on the LCD. (Note: Set the static
voltage of the surrounding environment to be 0, if not,
the measuring may be biased.)
5-3 Manual record mode
At measuring mode, click button to record

5
the present reading, the records can be logged up to 99.
5-4 Display logs mode
At measuring mode, click button to display
the readings of logged data while MEM symbol appears
on the LCD. Click button again to quit the mode.
Click button or button to select the
number of logs.
5-5 Backlight Mode
During measuring, click button to turn on the
backlight of LCD for 15 seconds and then turn off
automatically.
5-6 Setting mode
Press button repeatedly and enter the settings of
Step 1 to 4 sequentially.
Step 1. Set (HI) + alarm
1. While the LCD displays SET1 HI symbol, Press
or to move digits, press or
button to change the settings.
2. Quickly press button again and enter Step 2.
Step 2. Set (LO)- alarm
1. While the LCD displays SET2 LO symbol, Press
or to move digits, press or
button to change the settings.

6
2. Quickly press button again and enter Step 3.
Step 3. Set the alarm on or off
1. While the LCD displays SET3 and symbols,
press or button to change as
or OFF.
2. Quickly press button again and enter Step 4.
Step 4. Clear memory
1. While the LCD displays SET4 dEL symbol, press
or button to change as
or . As is chosen, press
button to get memory cleared.
2. Quickly press button to quit the settings
status.
PS: If to quit the settings status, press
button in any step.

7
6 Specifications
Display for readings: Liquid crystal display (LCD) of
4 1/2 digits with the displaying value up to 19999.
Resolution: 0.001KV.
Measuring range：-19.999KV～+19.999KV
Accuracy: ±(5%+10dgt).
Overloading indication: OL.
Sampling period: 2 times per second.
Battery: 9V NEDA 1604、IEC 6F22 or JIS 006P.
Battery life: Approximately 100 hours.
Operation temperature and humidity: 5 to 40oC (41
to 104oF); < 80%RH.
Storage temperature and humidity: -10ºC to 60ºC
(14 to 140oF), < 70%RH.
Weight: Approximately 210g.
Dimension: 148(L)x65(W)x37.5(H)mm.
Professional and precise static voltmeter with
resolution of 0.001kV.
Function including Data lock (HOLD), Max. value
(+PEAK) lock, Min. value (-PEAK) lock, Record
(REC) the displayed value, Display the logged data
(R-M), Zeroing (ZERO)
High voltage alarm:+/- 18.000KV。
Alarm setting:0.001KV～18.000KV
Auto power off (for about 15 minutes).
Battery low display .
Overload display OL.