M-system Mini-M M2ADS Instruction Manual page 3

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.
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) ZERO: Apply the input signals which should lead the
calculated result as 0%, and adjust output to 0%.
2) SPAN: [K + K ≥ 1] Apply the input signals which should
1 2
lead the calculated result as 100%, and adjust output to
100%.
[K + K < 1] Apply the input signals which should lead
1 2
the calculated result as [100 × (K
output to [100 × (K + K
1 2
3) Check ZERO adjustment again.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
+ K )]%, and adjust
1 2
)]%.
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
EQUATION
Output = K × Input 1 + K
1
K , K : 0.10 to 2.00 specified when ordering
1 2
(0.40 ≤ K + K )
1 2
Input 1, Input 2: 0 to 120%
Forcibly limited to 0% and 120% respectively when
the signal is out of range.
MAINTENANCE
Regular calibration procedure is explained below:
■ CALIBRATION
Warm up the unit for at least 10 minutes.
[K + K ≥ 1] Apply the input signals which should lead the
1 2
calculated result as 0%, 25%, 50%, 75% and 100%. Check
that the output signal for the respective input signal re-
mains within accuracy described in the data sheet.
[K + K < 1] Apply the input signals which should lead the
1 2
calculated result as 0%, [25 × (K
[75 × (K + K )]% and [100 × (K
1 2
output signal for the respective input signal remains within
accuracy described in the data sheet. When the output is
out of tolerance, recalibrate the unit according to the "AD-
JUSTMENT 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.
M2ADS
× Input 2
2
+ K )]%, [50 × (K + K
1 2 1 2
+ K )]%. Check that the
1 2
EM-5088 Rev.7 P. 3 / 3
)]%,