M-system JFR2 Instruction Manual page 6

• How to Change the Detecting Level
Input Monitor LED
Detecting Level Adj.
Detecting Level Adj. Pin
1
2
3
SW1
4
5
6
7
8
1
2
3
SW2
4
5
6
7
8
A voltmeter of class 0.5 or better accuracy with pointed
probes is required.
1) Connect the negative probe of voltmeter to the terminal 4
of base socket.
2) If you need a noise filter, set the SW1-7 and SW1-8 in
advance.
3) Connect the positive probe to the test pin and turn the
Detecting Level Adjustment until the meter shows de-
sired value.
4) Apply input signals and check that input monitor LED
(PL1) blinks according to the input signal.
If the LED does not blink, the detecting level may be out
of pulse amplitude range. Check the pulse amplitude
and the DC offset again and readjust the detecting level.
■ SENSOR EXCITATION ADJUSTMENT
You can change the sensor excitation voltage with the sen-
sor excitation adj. located behind the front cover. If you
need to change it, check that the required current is within
the specification.
• How to Change the Excitation
A voltmeter and ammeter of class 0.5 or better accuracy are
required.
SENSOR EXC.
V Voltmeter
A
Ammeter
MODULAR JACK
PU-2x
1) Connect the voltmeter across the terminal 5 – 4.
2) Connect the ammeter to terminal 5.
3) Turn the potentiometer until the meter shows the de-
sired value.
Check that the current value indicated on the ammeter
is within the allowable limit. If the value is greater than
the limit, lower the voltage value or connect a separate
power source. Otherwise, the transmitter may fail.
Voltage (V) × Current (A) ≤ 600mW
24
12
5
25 60
CURRENT (mA)
Voltmeter
V
SW3
–
Connect to Terminal 4
of the base socket.
– 4 1 +
OUTPUT
+ 5 2 –
7
U(+)
POWER
8
V(–)
120
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
JFR2
EM-1581 Rev.4 P. 6 / 8