Warnings and cautions
Operate the pump in the rated pressure range and do not exceed thesafety pressure of 9000 psi (600 bar).
Close the valves and tighten the ports when transporting the pump.
Always open the reservoir release valve during operation.
Do not over tighten the connectors or handles to avoid any damage.
Change contaminated media immediately.
Do not let the media level get below the mid line of the reservoir when
the pump is place horizontal.
Keep the outer threads clean.
Additel is not liable for any safety problems or damages caused bymisuse or incorrect operation.

Specification
Pressure range: 12.5 psi ( 0.85 bar ) vacuum to6000 psi ( 400 bar ) positive pressure
Remark：If local atmosphere pressure is 1 bar, the vacuum can reach to 0.85 bar;If local atmosphere pressure is P, the vacuum can reach to ( P 85% ) bar.

ADT925

Handheld Hydraulic Pressure Test Pump
User's ManualTemperature: （0~50）℃
Humidity: < 95%RH
Adjustment resolution: 0.015 psi ( 1 mbar )Safety pressure: < 9000 psi ( 600 bar )Pressure media: Oil or deionized water[Version number:1409V13]
Please download the latest version from www.additel.com

To reach the best performance, oil is recommended.
Recommended oil: Di-ethylhexyl Sebacate, Isovoltine II.

Size: Height: 4.72'' ( 120 mm );Base: 9.84'' ( 250 mm ) x 5.51'' ( 140 mm )Weight: 3.8 lb ( 1.7 kg ) ( excluding the media )Configuration & Pressure drawing
12 3 4

1 - Quick connector
2 - Reservoir release valve

Pressure drawing(open it to connect with atmosphere)

683 - Upper cover of reservoir
4 - High-pressure pressurization andfine pressure adjustment handle(clockwise to increase pressure)

5 - Liquid reservoir(inner is pressure media)

6 - Pre-pressurization handle

857(clockwise to increase pressure)

7 - Screw of fitting cover
8 - Vent valve(Open to connect with atmosphere)

2
5
4

6

Troubleshooting
Cause

Problem
Difficult to increase pressure withpre-pressurization handle

A. Vent valve is not closed.
B. The O-ring seal is loose or damaged.
C. Not enough media is in the reservoir.

Hard to fine adjust

it is difficult to turn valves or quickconnectors

D. The pump is not horizontal.
A. The vent valve is not closed.
B. The gauges are not connected tight.
C. The sealing ring is aged or frayed.
D. The thread surface is not smooth.
E. The connector type is mismatched to the gauge pressure port.
A. Too much force was previously applied.
B. The pre-pressurization handle may not adjust easily underhigh pressure.
C. The threads have no lubrication.

Solution
Close the vent valve.
Replace the O-ringFill with more fluid. Make sure fluid level is high enough after thegas purging process.
Place the pump horizontally to prepare for pressure or vacuum.
Close the vent valve.
Tighten the gauges.
Replace sealing ring.
Use Teflon tape on the thread and turn it in tight.
Use the correct adapter.
Do not over tighten.
Adjust pressure by using fine adjustment handle. (Pressure mayneed to be decreased with the fine adjustment handle before thepre-pressure handle can be used).
Lubricate the thread.

O-Rings for pressure connector

P/N

SizeConnector

1611300004
1611300220
1611300024

4X1.5
6.5X3
6X2

M10X1, 1/8BSP, 1/8NPT
M20X1.5, 1/2BSP, 1/2NPT
M14X1.5, 1/4BSP, 1/4NPT, 3/8BSP

Preparation
Open the reservoir①open

Filling/emptying the reservoir

ALock the reservoir

BC②open the upper coverFill or empty media

The media level should be 2/3 the height ofthe reservoir.

①close the upper cover②closeClean any impurities
from the media andreservoir.

Basic Operation
Connection

VentA

B

DIGITAL PRESSURE CALIBRATORDIGITAL PRESSURE

CALIBRATOR

Units

Units

A
0255075

A

1000SWSW

VmACOM

VmACOM

251007550Pressure Gauge

Zeroing should beoperated under
this condition only.

24V24V①openk②open

dial gauge

Purge process
DIGITAL PRESSURE

pressure switch

CALIBRATORDIGITAL PRESSURE

255075A100Vacuum displayed on the gauge(0～6）MPa

0502575100Pre-pressure

DIf air is still trapped in the pump ,then repeat the purge process 2or 3 more times until all the gas
is removed from the system.

CALIBRATOR

Units

Aflexible hose

Purge process (cont.)

C

Units

0pressure transmitter

DIGITAL PRESSURE

E

CALIBRATOR

Units

A

0100755025Pressure Gauge

Wait for gauge to vent to zero

③turn it to the smallest
degree①open②Turn all theway out①closeCALIBRATOR

Units

A

0255075100(0～6）MPa③Turn all the way inPressure Gauge②open

Vacuum preparation

F

If it is difficult to generatepressure, then repeat thepurging process to makesure all the gas is removed
from the system.

DIGITAL PRESSURE

Vacuum process

G

CALIBRATORDIGITAL PRESSURE

CALIBRATOR

Units

Units

A

02550

75

100

④turn it to the mid
position③turn it to greatest
degree②open

Pressurizing process
DIGITAL PRESSURE①open

bubble

0.06

A

0.04
0Vacuum Gauge2550750.06

1000.04

Vacuum Gauge.08

0.02.08

0.02

- 0.1

0- 0.10H

If it is difficult to generate
vacuum pressure , thenrepeat the purging process
to make sure all the gas isremoved from the system.

③generate high-pressureand fine adjust pressure②Pre-pressurization①close③fine adjust④turn it to the mid position①open②turn it to approach③turn it to the smallest
degree②open

the desire value①closeRemark:
A: Additel has made a concerted effort to provide complete and current information for the proper use of the equipment. The product specifications and other information contained thismanual are subject to change without notice.
B: Above pictures are just for reference.
Additel Corporation.USA
www.additel.com