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ES2 Electronic Liquid Level Transmitter
EX-1845
ES2 Range Adjustment Rotary
Switch Settings
The ES2 transmitter span can be turned down from the
nominal range indicated by the model number. (Refer to
"Span Adjustment Range" under Specifications on page
2.) This is how the transmitter's pressure range can be
reduced for a specific application.
Coarse Range Setting
An initial coarse range setting is provided by the rotary
switch. Use the previously outlined Zero/Span Calibration
to achieve the final trim setting for precise 4.00-20.00 mA
output over the intended pressure range.
The Span Ranging rotary switch on the transmitter circuit
board affects the span (range) of the transmitter and can
be used in addition to the fine span adjustment of the
potentiometer.
The rotary switch provides 16 increments of coarse adjust-
ment. Prior to changing the switch setting, check the current
output of the transmitter at the desired upper pressure
value. Also note the existing switch setting.
2-1.
Apply the desired maximum pressure to the sensing
diaphragm of the ES2 transmitter (requires a pres-
sure test shell available from King Engineering).
2-2. Record the existing setting position of the rotary
switch.
2-3. Adjust the potentiometer to maximum output by
turning clockwise until it “clicks”.
2-4.
To increase the milliamp output, use a higher switch
setting; to reduce the milliamp output, use a lower
setting. (The goal is to achieve a output signal value
just slightly above 20 milliamps and then use the
potentiometer to trim the setting.)
2-5.
Follow the Zero/Span Calibration procedure to check
both the zero and span output.
5
A
6
E
D
C
B
0 1
F
3
4
2
9
8
7
F = Highest
Decrease
Increase
Detail - Rotary
Span Switch
0 = Lowest
5
A
6
E D C B
0
1
F
3 4
2
9
8
7
WHEN NOT TO CHANGE SPAN
If a KING-GAGE indicator is part of the system, you
should not have to change the range (span) of the
transmitter.
When the ES2 transmitter is used with a KING-GAGE
digital tank level indicator, the "Application Datapack"
(iButton memory module) is generally programmed with
the nominal range setting. The indicator programming
will correlate the output signal to tank capacity regard-
less of whether the maximum tank level generates less
than 20.00 mA output from the transmitter.
