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EP-8000 Series Electro-Pneumatic Transducers Product/Technical Bulletin
7
If the calculated sensitivity does not fall within these
limits, the desired span cannot be obtained. Reselect
new desired values in Steps 1 and 2. Repeat Steps 3
and 4.
5. Determine if the zero setting is within one of the
adjustment ranges below:
Voltage Models: –6 P
L – (VL x SV)  +6
Current Models: –6 P
L – (IL x SI)  +6
If the zero setting does not fall within one of these
limits, the device cannot be zeroed. Reselect new
desired values in Steps 1 and 2. Repeat Steps 3
through 5.
6. Remove the cover from the unit by gently prying up
on the two snap-in cover tabs.
7. Connect filtered 20 psig (140 kPa) supply pressure
to the supply “S” connection on the unit.
(Low-volume models require a 0.007 inch
restrictor.)
8. Connect a JC 5361 Hypodermic Needle Test
Probe Assembly with a 0 to 30 psig (0 to 210 kPa)
G-2010 Series Air Pressure Gauge (both items
ordered separately) to the hypodermic needle test
point on the unit.
Note: In areas where use of a hypodermic needle
test probe is prohibited, an output test port can be
installed on the output side of the unit.
9. Connect an input signal to the unit: 0 to 10 VDC for
voltage models, 4 to 20 mA DC for current models.
10. Set the input signal to the desired low value (V
L or
I
L).
11. Turn the zero adjustment screw to obtain the
desired low pressure (P
L). Clockwise rotation
increases the pressure; counterclockwise rotation
decreases the pressure.
12. Set the input signal to the desired high value (V
H or
I
H).
13. Turn the span adjustment potentiometer to obtain
the desired high pressure (P
H).
14. Repeat Step 10 to check that the desired low value
(P
L) has not changed after adjusting the span. If
necessary, repeat Steps 11 through 13 to fine tune
the unit.
15. Disconnect the test probe assembly and gauge
from the unit.
16. Feed the input DC wires through the wiring entry
slot molded in the transducer cover, and snap the
cover into place.
Repair Information
If the EP-8000 Series Electro-Pneumatic Transducer
fails to operate within its specifications, replace the
unit. For a replacement transducer, contact the nearest
Johnson Controls representative.
To Order
Specify the code number from the following selection
chart.
IMPORTANT: For voltage models,
counterclockwise rotation decreases the pressure,
and clockwise rotation increases the pressure. For
current models, counterclockwise rotation increases
the pressure, and clockwise rotation decreases the
pressure.
Table 2: Selection Chart
Code Number Output Input Input Range Factory Output Range psig
(kPa)
EP-8000-1
1
Low Volume (Non-Relay) Voltage 0.5 to 9 VDC 1 to 18 (7 to 126)
EP-8000-2 High Volume (Relay) Voltage 0.25 to 9.5 VDC 0.5 to 19 (3.5 to 133)
EP-8000-3
1
Low Volume (Non-Relay) Current 4 to 20 mA DC 3 to 15 (21 to 105)
EP-8000-4 High Volume (Relay) Current 4 to 20 mA DC 3 to 15 (21 to 105)
1. Low-volume models are one-pipe instruments requiring a 0.007 in. (0.017 mm) R-3710 Series Restricter, ordered
separately.
Table 3: Accessories
Code Number Description
R-3710 0.007 in. Restricter (Required for Low-Volume Models)
EP-8000-101 Electro-Pneumatic Transducer Mounting Kit (For Mounting the EP-8000 to a Pneumatic Valve Actuator)