M2PHS2
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-5105 Rev.4 P. 4 / 4
HOLD MODES
■
PEAK HOLD MODE
The transmitter output responds only to an increasing sig-
nal, holding the maximum value until a higher signal or a
command to reset is received.
■
VALLEY HOLD MODE
The transmitter output responds only to a decreasing sig-
nal, holding the minimum value until a lower signal or a
command to reset is received.
■
PEAK-TO-PEAK HOLD MODE
The transmitter output responds only when the input sig-
nal goes over the previously monitored maximum value or
goes below the previously monitored minimum value.
The output is proportional to the peak-to-peak value, ab-
solute difference between the maximum and the minimum
values.
t
HOLD
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
t
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
INPUT
OUTPUT
RESET
• Peak-to-Peak Hold Mode
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
13 – 14 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
When the output does not track the input signal, check
that the contact closure of the terminals 5 – 8 matches
the DIP switch setting.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
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) Cancel the signal hold mode.
2) ZERO: Apply 0% input and adjust output to 0%.
3) SPAN: Apply 100% input and adjust output to 100%.
4) Check ZERO adjustment again with 0% input.
5) When ZERO value is changed, repeat the above proce-
dure 2) – 4).
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 “ADJUST-
MENT PROCEDURE” explained earlier.
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.
