Important Information and Warnings
FG
Power supply unit
Earthing of FG terminal
AC input
DC output
Surge absorbing circuit
①For stability, use a regulated direct current power supply.
Surge absorbing devices（diodes, varistors, etc.）are necessary if inductive loads such as relays or
solenoids are connected to the same circuit as the PG-35H.
If using a DC power supply unit such as a switching power supply, the FG terminal should be earthed. Do
not wire in parallel to high tension cables or power lines, or use cable ducts which contain high tension
cables or power lines.
②Be careful not to crimp any wires during handling, or put any pressure on the display area of the main body
while assembling piping.
③Use pH neutral detergents to clean the body. Do not use solvents such as thinners.
④This product is dust proof and drip proof（IP65 of IEC standards）and is not suitable for use in
environments requiring higher standards.
Also, do not use this product in an environment with a possibility of product being covered by liquids other
then water（Such as oil, solvent, and etc.）and outdoor.
⑤Do not use pointed objects such as pens to press the setting buttons on the display panel, as this may push
holes in the setting buttons and damage them.
⑥Do not insert wires, etc. in the pressure port, as this may damage the internal diaphragm and cause
malfunctioning.
⑦The PG-35H series do not have an explosion proof structure.
Do not use it for the detection of flammable gases.
⑧When analog output is supplied to a noise-sensitive device,a
low-pass filter is requested in a customer's circuit.
⑨Countermeasures for noise interference:
Please connect either the shield wire or the metal part of the
product to frame ground（FG）of the power source.
⑩In case a wire extension is needed, please use a shielded
wire.
INSTRUCTION MANUAL
Ver.3.2
Nishi-Shinjuku Prime Square., 7-5-25
Nishi-Shinjuku,
Shinjuku-ku, Tokyo 160-0023 Japan
https://www.nidec-copal-electronics.com
For more detailed information please ask for the nearest
distributor or the following sales center.
Thank you for purchasing a
NIDEC COPAL ELECTRONICS CORP. product.
In order to use the product correctly and most
appropriately, please completely read this manual before
use and keep it for future reference.
SMALL SIZE PRESSURE GAUGE
PG-35H
1
