Machine Guard MG4-REF11 A
15
SPM Instrument AB
• Box 504 • SE-645 25 Strängnäs • Sweden
Technical data are subject to change without notice.
Tel +46 152 225 00 • Fax +46 152 15075 • [email protected] • www.spminstrument.com
ISO 9001:2000 certified © SPM 2017-09. 71947 B
Programming a SPM channel
Select the SPM channel with the SET key and press ENT to get the sequence of programming menus.
”TLT” on line 2 of menu (A) shows the transducer line status. For an SPM channel it is a number
expressing the quality of the measuring circuit. Normal values are around 20, the lowest acceptable
value is 15 (recommended). Values below 15 invalidates the measuring results because the input
signal quality is poor. RETURN takes you back to the main menu. Press ENT.
Move the cursor with SET to mark SETUP (A). Press ENT (password should be open). In menu B the
first line contains the channel name, which can be changed. W-POINT is the working point and can
be set 20 to 60 % (default 30%). The correct gain will be set automatically from this preset value
(the MG4-REF11A unit automatically adjusts the gain).
On the menu (C) you can change the value for TLTA ( = transducer line alarm) and the two standard
alarm limits A1 (70%) and A2 (10%). Both limits are relative values based on dBc values. A1 and A2
will trigger the relays and change the evaluation in green/red, indicated by the status LED display.
System alarm (TLTA) and the two alarm limits A1 and A2 can be linked to any of the available relays
by setting the relay number 1 to max. 5. A relay can be linked to more than one alarm cause. The
setting ” – ” means no link to a relay.
On the menu (D) you set the link to an analog output channel for the 4 - 20 mA signal by setting a
channel number from 1 to max. 4. SPM monitoring returns three values, % (relative value based on
dBc), maximum value dBm (dBsv) and carpet value dBc (dBsv). The analog line can not, of course,
be linked to more than one measuring channel. Only free channel numbers are displayed.
On the menu (E) you set the dBsv value corresponding to 4 mA (100 dBsv is always 20 mA out).
The analog current will be scaled accordingly to the setting.
Alarm delay is set in steps of 2 seconds by stepping to a number above 0 on menu (E). The maxi-
mum is 600 seconds or 10 minutes.
Set W-point:
SPM channel
TLT 18 return
Adjust
Setup
SPM channel
W-point 40 %
SPM channel
Analog out 1 %
Analog out 2 dBc
Analog out 3 dBm
dBsv and alarm delay:
SPM channel
4 mA = 0 dBsv
Alarm
delay – – – s
Press ENT to exit to
the measuring mode
A
B
E
D
Select setup:
Analog output channel:
Alarms, links to relays:
SPM channel
TLTA 15
Relay 5
A1 % 70
Relay 1
A2 % 10
Relay 2
C
Summary of Contents for Machine Guard MG4-REF11A
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