LM1000
LEVEL MONITOR
AND CONTROL

• Available in panel mount and NEMA 4X enclosed versions.

• Bright 4 digit LED Display indicates level in feet to two decimal

• places

• Built in level sensor calibrator

• Relay output that can be used for alarm or control output.

• Setpoint adjustable over entire 4-20 mA span

• Dead band adjustable 1% to 90%

• Built in 24 VDC 2 wire sensor transmitter power supply

• UL/cUL Recognized

DESCRIPTION

The LM1000 is designed to monitor the level of liquids using a pressure sensor as the source of level data. A four digit LED display indicates level in feet to two decimal places (XX.XX). The LM1000 provides 24 VDC regulated power for a 2 wire transmitter.

An Alarm circuit with a SPDT relay output can be set as a high or low alarm. It can be configured as a Normal or Reverse Acting (fail safe) alarm. The Setpoint control is adjustable over the entire 4-20 mA input range and a Deadband control allows the Hysteresis to be set from less than 1% to 90% of the span.

Using the Alarm circuit, the LM1000 can also be used as a level control by setting the Alarm to trip at a high level to start the pump and setting the Deadband to stop the pump when the level falls to the desired lower limit.

The LED display can be switched to indicate level or to accurately indicate the loop 4-20 mA current. A built in calibrator allows the loop current to be adjusted over the 4-20 mA range with a ten turn potentiometer. The calibrator function is chosen with a spring loaded switch that returns the LM1000 to the Level indication mode when released. This spring loaded switch insures the unit is not inadvertently left in the Calibration mode. The unique positioning of the switch in relationship to the adjustment potentiometer allows single handed simultaneous operation of both the switch and the potentiometer.

The calibration function can be used to calibrate the LED display in Level. It can also be used to calibrate the alarm Setpoint and Deadband. An LED indicator behind the display lens indicates when the alarm is energized.

Available options include the LS1000 pressure transducer / transmitter level sensor and a pipe mounting kit for the NEMA 4X enclosure.

SPECIFICATIONS

Power:
120 VAC or 240 VAC
  ± 10% 50/60 Hz

INPUT
2 wire transmitter, output proportional to level
  (LM1000 provides 24 VDC power to transmitter)

OUTPUT
4 - 20 mADC proportional to Level

ALARM / CONTROL OUTPUT
SPDT Relay
  Rated 5 Amps, 240 VAC

OUTPUT DEADBAND
Adjustable 1% to 90% of scale

DISPLAY
4 Digit .56" LED

DISPLAY RESOLUTION
2 decimal places to 99.99 Ft. or loop current in mADC

CONTROL TYPE
On - Off
  Reverse (pump out) or Direct (pump in)

POWER CONSUMPTION
3.5 VA maximum

ACCURACY
0.05% of Span ± 1 digit

OPERATING TEMPERATURE
-13°F to 176°F
(-25°C to 80°C)

Panel Mount (PM)
  Anodized aluminum front panel
  Dimensions: 6.13" x 7.75" x 1.88"

NEMA 4X (N4)
  Fiberglass reinforced polyester NEMA 4X enclosure
  Hinged door with viewing window
  SS latch with padlock hasp
  Dimensions: 9.59"H x 7.71"W x 4.03"D

Custom (CU)
  Per customer specification