■
LOW-END CUTOUT & ALARM TRIP
[Example]
Input zero frequency: 0 Hz
Input span frequency: 1 kHz
Low-end cutout: 60%
Low-end cutout deadband: 1%
Low alarm setpoint: 50%
Alarm deadband: 20%
• When the input is decreasing:
The output goes down to 0% when the input goes below
60%. With the low alarm setpoint set to 50%, the alarm is
turned on (0% output).
OUTPUT
INPUT (%)
Alarm Contact ON
0
60
100
0 Hz
1 kHz
• When the input is increasing:
The low-end cutout is reset when the input goes above 61%
(low-end output at 60% plus 1% deadband). With the low
alarm setpoint set to 50%, the alarm is turned off when
the input goes above 70% (alarm setpoint at 50% plus 20%
deadband).
OUTPUT
INPUT (%)
Alarm Contact ON
0
61 70
100
0 Hz
1 kHz
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ANALOG
OUTPUT ADJUSTMENT” procedure.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
JPA2
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-1572 Rev.5 P. 9 / 9