Cautions:
When the temperature detector head not put into the meter, the displaying
value is meaningless, attached with the meter, the limited temperature of the
conjunction thermoelectric couple , which is the K type WRNM-010, bareness
style, is 250
℃
( may reach 300
℃
in short time)
。
4.10 Measurement of frequency
Turn the range switch into the range 2kHz, put the black pen into the jack
“COM”, the red into the jack“V/
”, in parallel connect the two pens into the
measured circuit, get the reading.
4.11 Measurement of phase sequence
Turn the range switch into the range AC600V, put the black pen into the
jack“COM”, the red into the jack “V/
”, take a press on the button for
measurement of phase sequence, LCD shall display symbol“
”
，
for
measuring phase sequence, after a measure to phase sequence, if measuring
again, it is necessary to press the button for phase sequence to cancel the
function on measurement of phase sequence at first, then restart the function
on measurement of phase sequence, the meter sets its phase sequence as
A B C.
4.11.1 Measurement of three-phase four-wire system:
(1)
Confirm phase A: connect the black pen into the zero wire or the
ground wire, the red pen into any hot wire, LCD shall show the
symbol A, here the phase connected with the red pen is defined as
phase A.
(2)
Find phase B or phase C: connect the black pen into the zero wire or
the ground wire, the red into any hot wire of the other hot wires, when
LCD shows the symbol B, the phase connected with the red pen is
defined as phase B
，
when LCD shows the symbol C, the phase
connected with the red pen is defined as phase C
(3)
During measuring, the meter may show the value of the line voltage
of the measured phase:
(a) When the measured line voltage is less than 30% of the other
phases, then the phase is lost;
(b) When either phase B or phase C cannot be found, then either phase
B or phase C is lost.
4.11.2 Measurement of three-phase three-wire system
：
(1)
Confirm phase A: connect the black pen into any wire, the red pen into
any wire of the other, LCD shall show the symbol A, here the phase
connected with the black pen is defined as phase A.
(2)
Find phase B or phase C:
(a)
Keep the black on the original phase, connect the red into the third
phase, when LCD showing B, here the phase connected with the red
is phase B, may judge the phase connected with the red in step (1) is
phase C.
(b)
When LCD showing C, here the phase connected with the red is
phase C, may judge the phase connected with the red in step (1) is
phase B.
(3)
During measuring to step (1)
、
(2), the meter shall show line voltage
（
380V
）
. If the voltage of a phase is less than 30% of the others, then
the phase of the lower voltage is lost, after phase A is confirmed, either
phase B or phase C cannot be found, then either phase B or phase C is
lost.
Cautions
：
please reset before each measurement
（
quit the function
on the measurement of phase sequence, then restart the function
）
measuring period may not more than 10 seconds.
5. Technological Indices
Accuracy guarantee: 1 year
，
Temperature of keeping accuracy:23
℃
±5
℃
Relative humidity:<75 %
。
Function
Range
Resolution
Accuracy
20A
10mA
ACA
600A
1A
1.9%
5
ACV
600V
1V
1.2%
5d
20V
0.01V
DCV
600V
1V
0.8%
2d
Resistor
2k
1
1.0%
2d
FREQ
2kHz
1Hz
2.0%
5d
ACA frequency range
：
50~60Hz( sine wave)
，
ACV frequency range
：
50~100Hz(sine wave)
。
Function
Range
Resolution
Accuracy
-30~400
℃
1
℃
1.2%
4d
Temperature
400~1000
℃
1
℃
1.9%
15d
Diode
Show the value of the forward voltage. Test conditions:
forward DC current is about 1mA
，
backward DC voltage
is about3V
。
Connection &
disconnection
When Conductive resistance is less than about 50
, the
buzzer in the meter sounds, test conditions
：
open voltage
is about 3V
。
Phase
sequence
May measure the phase sequence of AC when phase
tolerance is under ±25
Resistor,Diode;Buzzer,FREQ Overload Protection :250V
6. Maintenance of the Meter
Cautions
！
Before open the covers of the meter, or the batteries, shall
switch off power and disconnect the pens and any input signal to prevent
danger of shock.
6.1 when the meter shows symbol“
”, shall change battery. Open the
battery cover, change a fresh battery with 9V ( Automatic range meter
：
Two
new batteries with AAA1.5V ), to make sure the meter normal work.
6.2 Keep the meter and the pens clean, dry and non-damage, may clean the
meter surface with clean clothes or eradicator, abrasive or organic solvent is
banned.
6.3 Avoid mechanical damage, shake, impact, keep the meter away from high
temperature and strong magnet field.
6.4 The meter shall be calibrated once a year.
7. Accessories
7.1 A pair of pen
7.2 A manual
7.3 K type detector head for temperature