40LV
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-9531 Rev.4 P. 4 / 4
DECIMAL POINT POSITION
Close across the terminals as following.
Use a short-circuit bar or a short wire.
DP1 (×10
1
) LED ON Terminal 7 to 3
DP2 (×10
2
) LED ON Terminal 6 to 3
DP3 (×10
3
) LED ON Terminal 5 to 3
10
3
10
2
10
1
DP3
DP1
10
0
DP2
DISPLAY HOLD COMMAND
Connect the contacts across HOLD to COM.
L
HOLD
H
L
HOLD
H
Twisted pair cable
Twisted pair cable
Relay
Photo-Coupler
COM
HOLD
COM
HOLD
(a) Photo-Coupler
(b) Relay
MAINTENANCE
Regular calibration procedure is explained below:
■
CALIBRATION
1) Turn on the power supply on the unit and keep on sup-
plying the voltage for 10 minutes or more.
2) Remove the front panel.
3) Make a line between terminals 1 to 2 short-circuited and
confirm that the display becomes “000.”
4) Connect a signal generator to the unit, adjust the signal
to the values in the following table and confirm the dis-
plays.
MODEL
SIGNAL VALUE
DISPLAY VALUE
40LV-V1-R
199.0 mV
1990
40LV-V2-R
1.990 V
1990
40LV-V3-R
19.90 V
1990
40LV-V4-R
199.0 V
1990
40LV-A1-R
199.0 µA
1990
40LV-A2-R
1.990 mA
1990
40LV-A3-R
19.90 mA
1990
40LV-A4-R
199.0 mA
1990
40LV-A5-R
1.990 A
1990
5) If the display value is different from the signal value, ad-
just it turning the span adjuster at “1990.”
6) Mount the front panel to the unit again and confirm that
the measurement accuracy is according to the range.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protectors for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.
