Greyline Instruments LIT25 User manual

USER’S GUIDE
Installation & Operation
Instructions
Level Indicating Transmitter
Model LIT25
Manual Series 3.5.1

Note: This page has been left blank intentionally.

IMPORTANT NOTE: This instrument is manufactured and calibrated to meet product specifications.
Please read this manual carefully before installation and operation. Any unauthorized repairs or
modifications may result in a suspension of the warranty.
Available in English
Available in Adobe Acrobat pdf format
Disponible en français
Disponible en español
Page 3
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
INDEX
Bench Test ······················································· 4
Connections ······················································ 4
Calibration System················································· 6
Menu ··························································· 7
Calibration Units Selection ·········································· 8
4mA Calibration ·················································· 9
Signal Relay····················································· 10
Damping························································ 11
Echo Loss Response ·············································· 11
Output Simulation ················································ 12
Store/Save Calibration ············································· 12
Temperature Indication ············································ 13
Enclosure Installation·············································· 14
Sensor Mounting ················································· 15
Error/Warning Messages ··········································· 18
Troubleshooting ·················································· 19
Applications Hotline ·············································· 22
Product Return Procedure ·········································· 23
Warranty ······················································· 24
Appendix A ····················································· 25
Appendix B ····················································· 30
Conversion Guide ················································ 31
Specifications···················································· 32

QUICK BENCH TEST:
Connect Sensor as shown below, then apply Power. When properly connected a soft clicking can be
heard from the sensor and figures will show on the LCD display. Test operation of the LIT25 by holding
the sensor steadily and aiming at a flat, stable target 12 to 28" (305 to 711 mm) away from the end of the
sensor. Allow a few seconds for the LIT25 to lock onto the target before displaying its distance. The
LIT25 will now display range in inches or cm.
Note: The LIT25 will not detect targets beyond the user entered maximum range.
CONNECTIONS:
POWER INPUT: The standard model requires AC power input between 100 to 130VAC 50/60Hz (1
amp fuse is recommended). No adjustments are necessary for any voltage in this range. Option EI rating
is 100-240VAC 50/60Hz. (See OPTIONS section of this manual for connection of optional 24VDC
power input).
IMPORTANT NOTE: To comply with CSA/NRTL standards, AC power input and relay connection
wires must have a water tight fitting conduit entry to the instrument enclosure.
Page 4
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
14 AWG MAX
SENSOR
RELAY
(1 AMP)
LINE
NEUTRAL
4-20mA
+ –
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND ( 1 Ohm)
WITH 14 AWG CONDUCTOR
<
CONNECT SHIELD
TO GROUND
(THIS END ONLY)
RG62AU COAXIAL
TO SENSOR
GROUND
GND
CURRENT SOURCE
DO NOT POWER LOOP

RECOMMENDED CONDUIT ENTRY
Use a screwdriver to "knock-out" conduit entry points at bottom of enclosure.
Use one entry for power input and relay wires. Use separate entry for 4-20mA and sensor cable.
Page 5
LIT25 Level Indicating Transmitter
Manual Series 3.5.1

KEYPAD SYSTEM
The LIT25 has a simple 2-key calibration system. Operating and calibration modes are shown on the
4-digit display. The keys are used to calibrate the LIT25, and to view operating mode and functions. If
the keys are not used for 10 minutes, the LIT25 will automatically go to NORMAL MODE. Except in
OUTPUT SIMULATION mode, the Relay and 4-20mA output are not affected by use of the keys until your
calibration is stored.
MENU - FLOW CHART
The following diagram shows the LIT25 Menu system. Arrows show the directions to leave a box.
Pressing a corresponding key will move to the next box in the direction shown. Numeric values are
changed by pressing and holding the Çor Èkeys.
At the bottom of the Menu is a YES? prompt. To store the calibration values permanently (even through
power failure), press the Çkey. If the Èkey is pressed from the YES? prompt no changes will be
stored and the system will return to NORMAL mode.
Page 6
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
PERCENT INCHES CM
LIT25
LEVEL INDICATING TRANSMITTER
ECHO
RELAY
CALIBRATION KEYS
POWER
CONNECTION
4-DIGIT LCD DISPLAY
SENSOR
CONNECTION
4-20mA
CONNECTION
GND
+–

MENU
Page 7
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
dp10
706.9
721.4
r oFF
ron
roc1
20 = 40.6
762.0
4=
123.4
CALU
638.6
CM
CM
CM
CM
LEVEL CM
PERCENT INCHES CM
RANGE CM
23c
3,5 1,2,4
TEMPERATURE
Displays Temperature at Sensor
RANGE DISPLAY
Displays Distance from Sensor to Target
(Does not affect 4-20mA output or Relay)
NORMAL MODE
CALIBRATION UNITS SELECTION
Press Çto select inches, cm or percent
4mA and 20mA CALIBRATION
Wait for the Numeric value then press ÇÈ
È
or to increase
or decrease. Value displayed is Distance from the Sensor
in inches or cm.
for Next FunctionWaitfor4=or20=andPress
RELAY SET POINTS
Wait for Numeric value and press
C).°
ÇÈand to
adjust Set Points (in Units selected, or
DAMPING (0 - 20 SECS. )
Press to AdjustÇ
RELAY OPERATION CHOICE
Press Çto select:
1 = Level Alarm
2 = Level + Echo Loss
3 = Echo Loss Only
4 = Temperature Alarm
5=Off
13
13
8
8
9
10
11
11
12
12
See Page #
YES?
-C.S-
0.0OPSL
ELC 1
CM
YES
NO
ECHO LOSS CHOICE (4-20mA OUTPUT)
Press to Select action when echo lost
1 - Hold 2 = Go to 4mA 3 = Go to 20mA
Ç
OUTPUT SIMULATION
Wait for Numeric value and press or to Increase
or Decrease Simulated Output
(Automatically returns to NORMAL mode in 10 min.).
ÇÈ
STORE YES?
Press to Store Calibration (Displays -C.S.-)Ç
Press Calibration Not StoredÈ
Sb=n
Press
equipped with an optional Intrinsic Safety Barrier for
sensor mounting in hazardous locations. This setting
compensates for the electrical characteristics of an
Intrinsic Safety Barrier.
Çto select "Y" (Yes) only when the instrument is
11

NORMAL MODE
CALIBRATION UNITS SELECTION
Press Èfrom NORMAL mode, Display will show:
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
Page 8
LEVEL CM
Fl
as
h
es w
h
en goo
d
ec
h
oes
are received
ON - Relay energized
OFF - Relay de-energized
When Calibrated
for 20mA at Minimum Range
(Maximum Level)
ECHO
RELAY
When Calibrated
for 20mA at
Maximum Range
20mA =
20mA = 4mA =
4mA =
Ç
Ç
Ç
PERCENT
INCHES
CM
PERCENT INCHES CM
È
4-20mA
CALIBRATION
Echo light keeps
f
lashing
to show instrument
still operating

4mA CALIBRATION
20mA CALIBRATION
Wait for 4=and press Èto display 20 =. Now follow the same procedure to calibrate the distance from
the Sensor for 20mA output.
Remember that the LIT25 automatically reads LEVEL if 20 = is set to the minimum distance from the
sensor. Calibrate in RANGE mode by setting 20= to the maximum distance from the sensor.
Page 9
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
È
20 =
È
È
È
761.9
761.8
761.7
Ç
Ç
Ç
762.1
762.2
762.3
The Display will alternate between every 3 seconds
.
MAXIMUM VALUES: 600 inches / 1524 cm
MINIMUM VALUES: 8 inches / 20.3 cm
MINIMUM SPAN (distance between 4= and 20=): 2" (5 cm)
and
RANGE
(Outage)
4mA =
20mA =
12"/30.5cm
2"/5cm
LEVEL
(Inventory)
20mA =
4mA =
12"/30.5cm
2"/5cm

SIGNAL RELAY
The LIT25 Relay is rated 1ampere, 24VDC, 120/240VAC. It includes an
internally connected noise suppressor or “snubber” with 25K ohms impedance.
Very low AC electrical loads may appear to “leak” current.
Maximum leakage is:
10mA @ 110VAC
20mA @ 220VAC
No leakage will be measured with DC electrical loads.
RELAY OPERATION CHOICE
The LIT25’s Signal Relay can be configured to operate as:
ROC1 = Level Alarm
ROC2 = Level + Echo Loss Alarm
ROC3 = Echo Loss only Alarm
ROC4 = Temperature Alarm (measured at the Sensor)
ROC5 = OFF (de-energize) at all times
Press Çto select the ROC.
RELAY CALIBRATION
ROC1 (Level Alarm)
ROC2 (Level + Echo Loss Alarm) - Relay will be energized when the Relay ON set point is
reached.
or if the echo is lost (no echoes for more than 20 seconds).
ROC4 (Temperature Alarm) - Minimum Set Point -40°C(=-40°F)
- Maximum Set Point 100°C(=212°F)
NOTE: The Set Points are displayed in the units selected at CALU. Two different Set Points (RON and
ROFF) allows a Relay “deadband” for Pump Control and to avoid Relay chatter.
Page 10
LIT25 Level Indicating Transmitter
Manual Series 3.5.1
RELAY
(1 AMP)
INTERNALLY
CONNECTED
SUPPRESSOR
Ç
Ç
Ç
ROC2
ROC3
ROC4
È
ROC = 3,5
È
È
ROC = 1,2,4
È
È
È
È
721.3
721.2
721.1
Ç
Ç
Ç
0.0
0.1
0.2
The Display will alternate between every 3 second
s
ÈÇ
and