HTC TM-527 Handheld Digital TeslaMeter User Manual
- June 10, 2024
- HTC
Table of Contents
TM-527
Handheld Digital TeslaMeter
USER’S MANUAL
TM-527 Handheld Digital TeslaMeter
HTC reserves the right to add, improve, modify, or withdraw function, design
modification, or products at any time without notice. HTC shall not be liable
for errors contained herein or for incidental or consequential damages in
connection with use of this material.
The HTC website, www.htcinstrument.com
contains details of all our products. This site is regularly update, so check
it from time to time to learn about recent development.
GENERAL DESCRIPTION
The TM-527 Handheld Digital Telemeter is a field-portable unit that measures DC magnetic fields with direct digital readout in mT or G. The unit is designed for wide range, auto-range, high accuracy, and ease of use.
SPECIFICATIONS
2.1. TM-527
| Range | 200 mT/2000 mT |
|---|---|
| Scope | Maximum calibration field 2400 mT, 24 kiloguass |
| Resolution | 10 µT |
| Accuracy | 0~1000 mT: 2% |
1000 mT ~ 2400: mT 5%
Display| （4 digit in Decimal）
Power| 9 V (6F22) x1
Operating environment| 0ºC ~ 50ºC
Storage temperature| 20 ~ 50ºC
Dimensions| 160 mm × 80 mm × 32 mm
Weight| 260 (include battery and cable)
Hall probe| Transverse probe , with 1 m cable
INTRODUCTION
TM-527 Handheld Digital Telemeter front panel is shown in Fig1
TM-527 front panel key are defined as follows.
- ON/OFF : Turns power to the unit on/off.
- Hold: Turn Max Hold feature on and off. Max Hold captures and displays the highest field reading.
- Turn backlight feature on and off. Backlight lighten up the LCD for reading.
- NULL: Used to zero or null effects of ambient low level fields from the probe. When user pushes the NULL key ,”0000.0G or 000.00 mT” displayed. The unit then automatically accepts whatever residual field it reads as a zero offset .
- mT/G: Changes units from mT to gauss .Gauss is used in the cgs system :1G=0.1 mT mT is used in the SI system :1 mT=10 G
When the stud-snap battery is used up, you should take the follow steps to replace it. Firstly, use a long-stemmed driver to remove off the screw which on the hole shown in the fig 3. Secondly, unfasten the snap of the battery, then take a new battery replace of the old, fasten the snap, screw on. Finally replace the battery door.
TRANSVERSE PROBE
TM-527 can use either the transverse probe shown in Fig 4.
CAUTION : Care must be taken when handing the probe .The tip of the probe is very fragile .Pressure the Hall sensor can alter its calibration. Don’t apply more force than is required to hold probe in place. So there is no excessive pressure which will tend to bend or depress the sensor substrate and will destroy the Hall element inside.
INITIAL SETUP
5.1. Install Batteries
When the stud-snap battery is used up, you should take the follow steps to
replace it. Secondly, unfasten the snap of the battery, then take a new
battery replace of the old ,fasten the snap, screw on. Finally replace the
battery door.
5.2. Select probe
You can select the axial or transverse probe.
5.3. Connect the Hall probe
Plug the probe into the male connector at the top of the telemeter. Make sure
that the groove of female connector with the probe and bump of the male
connector be matched shown in Fig 5 . However, it is most important that
certain precautions be taken when handing and installing probes so that they
are not damage or destroyed, and to preserve their accurate calibration.
5.4. Turn on apparatus
Push the ON/OFF key on. The LCD displays like Fig 2.
5.5. Null Probe
It is good practice to zero the instrument immediately prior to making
critical field measurements. For absolute zeroing ,place the probe in a zero-
field region, either in a zero field chamber or inside a suitable , magnetic
field, so that the probe is shielded from the earth’s magnetic field and other
stray fields. If desired, a relative zero setting may be done; the instrument
is zeroed after the probe is placed in its measurement position .Thus any
ambient field is automatically subtracted from subsequent measurement. The
probe should not be moved once zeroing is complete.
OPERATION
6.1. Turn on meter
Push the ON/OFF key. The LCD displays parameters as range, polarity,
value, unit, battery indicator, percent of range and so on.
6.2. Gauss/mT
Press the Gauss/mT key to toggles the display between the two units.
6.3. Handing probe
The tip of the probe is very fragile. Stressing the Hall senor alter its
calibration. Any excess force can easily break the sensor. Broken sensor are
not repairable. The axial sensor is exposed on the end of the probe. A
collision with a hard surface can damage the sensor or wear away its
protective coating. The transverse sensor is somewhat susceptible to bending
stress and erosion of the protective coating.
When the meter is not in use, the probe should be mounted by cover.
6.4. Probe operation
For best results, the instrument and probe should warm up for at least 10
minutes before operation.
When magnetic field forward vertical cross the Hall sensor, the polarity is
positive(N) see Fig 6, or is negative (S)
Probe readings are dependent on the angle of the sensor in relation to the magnetic field. The magnetic field should Vertical cross the sensor. Maximum output occurs when the flux vector is perpendicular to the plane of the sensor. The greater the deviation from Vertical orientation, the larger error of reading.
6.5. Hold
The Hold function display the largest field magnitude measured .When the Hold
key is pressed, the maximum value is captured and shown in the display. The
“Hold” is displayed in the LCD like in Fig 2. Press the Hold key again, Hold
function will be turn off ,the “Hold” is disappear .The meter is real-time
measurement of magnetic field.
IN CASE OF TROUBLE
- Can’t turn on the power or automatic shut off. The solution :check the battery install correctly and the power is sufficient. If not please take the steps like the section “INITIAL SETUP” to change a new battery or fasten the snap.
- The LCD can’t light up. Check the female connector of probe and the male connector at the top of TM-527 tighten or connected correctly.
References
Read User Manual Online (PDF format)
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