• How to Change the Detecting Level
5
4
3
2
1
0
9
8
7
6
1
2
3
4
5
6
ON
Detecting Level Adj.
Detecting Level Adj. Pin
Input Monitor LED PL1
V
–
Connect to Terminal 6
of the base socket.
Voltmeter
A voltmeter of class 0.5 or better accuracy with pointed
probes is required.
1) Connect the negative probe of voltmeter to the terminal 6
of base socket.
2) If you need a noise filter, set the SW4 and SW5 in ad-
vance.
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.
+
–
OUTPUT
1
2
U(+)
V(–)
POWER
7
8
PU-2x
MODULAR JACK
–
INPUT
+ 5
4
6
+
EXC.
9
10
ALARM OUTPUT
V
A
Ammeter
Voltmeter
11
RESET
INPUT
• How to Change the Excitation
A voltmeter and ammeter of class 0.5 or better accuracy are
required.
1) Connect the voltmeter across the terminals 4 – 6.
2) Connect the ammeter to terminal 4.
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.
25
5
12
24
60
120
CURRENT (mA)
VOLTAGE (V)
Voltage (V) × Current (A) ≤ 600mW
■
ANALOG OUTPUT ADJUSTMENT
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
• How to Calibrate The Output Signal
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply the number of pulses equivalent to zero
count (or set the input count to zero count using the Pro-
gramming Unit) and adjust output to 0%.
2) SPAN: Apply the number of pulses equivalent to span
count (or set the input count to span count using the Pro-
gramming Unit) and adjust output to 100%.
3) Check ZERO adjustment again with zero count.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
JPQ2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-1579 Rev.3 P. 6 / 8