Trouble-Shooting; Normal Operation - Endress+Hauser nivotester FTC 4 serie Montage- Und Betriebsanleitung

Nivotester FTC 420/421

Normal operation

Table 5

Trouble-shooting

Testing the measuring
system
Endress+Hauser Sales Centers
A Tel. (01) 8 80 56-0, Fax (01) 8 80 56-35
B+L Tel. (02) 2 48 06 00, Fax (02) 2 48 05 53
CAN Tel. (9 05) 6 81 92 92, Fax (9 05) 6 81 94 44
CH Tel. (0 61) 7 15 62 22, Fax (0 61) 7 11 16 50
D Tel. (0 76 21) 9 75 01, Fax (0 76 21) 97 55 55
DK Tel. (31) 67 31 22, Fax (31) 67 30 45
ES Tel. (93) 4 80 33 66, Fax (93) 4 73 38 39
F Tel. 89 69 67 68, Fax 89 69 48 02
BA 021F/00/a2/05.98
HD/CV4.2
4. Trouble-shooting
When the Nivotester FTC 420 or 421 is operating:
• the green LED lights continuously,
• the red LED lights when the relay output is de-energised.
The switching of the relay depends upon the fail-safe mode
selected see Figs 7 and 8 on page 28.
Fault Possible reason
Green LED No power - check wiring
does not light
Nivotester does Wiring/probe fault
not switch - check as described below
Nivotester New product? New electronic insert?
switches too late Calibrate again.
For FTC 421 - check timer
Red LED Build-up at probe
remains lit/unlit Bad calibration - repeat
a) Testing the Nivotester FTC 420/421 alone:
• If the FTC 420/421 signals »empty«, short-circuiting terminals
8 and 10 must lead to a »full« signal.
• If the FTC 420/421 signals »full«, which is only possible when a
probe with electronic insert EC 61 is connected, short-circuiting
terminals 8 and 9 leads to an »empty« signal.
b) Testing the complete measuring system:
• Touching the central fixing screw of the electronic insert with an
insulated (electrician's) screwdriver: the relay in the Nivotester
must switch.
GB Tel. (01 61) 2 86 50 00, Fax (01 61) 9 98 18 41
HK Tel. 25 28 31 20, Fax 28 65 41 71
I Tel. (02) 92 10 64 21, Fax (02) 92 10 71 53
J Tel. (04 22) 54 06 11, Fax (04 22) 55 02 75
MAL Tel. (03) 7 33 48 48, Fax (03) 7 33 88 00
N Tel. (0 32) 85 10 85, Fax (0 32) 85 11 12
NL Tel. (0 35) 6 95 86 11, Fax (0 35) 6 95 88 25
S Tel. (08) 6 26 16 00, Fax (08) 6 26 94 77
SF Tel. (90) 8 59 61 55, Fax (90) 8 59 60 55
SGP Tel. 4 68 82 22, Fax 4 66 68 48
Trouble-shooting
THA Tel. (2) 9 96 78 11-20, Fax (2) 9 96 78 10
USA Tel. (3 17) 5 35-71 38, Fax (3 17) 5 35-14 89
ZA Tel. (0 11) 4 44 13 86, Fax (0 11) 4 44 19 77
INTERNATIONAL Tel. + Fax: see »D«
http://www.endress.com
10.97
015399- 0000